/* ===== CSS 变量与全局重置 ===== */
:root {
    --primary-dark: #0a2540;
    --primary-blue: #004b8f;
    --primary-light: #4db8ff;
    --bg-light: #f8fafc;
    --text-dark: #1a2a3a;
    --text-muted: #4a6a8a;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased; /* 苹果字体平滑 */
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: var(--transition);
}

    a:hover {
        color: var(--primary-dark);
    }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
}

/* ===== 顶部通知栏 ===== */
.top-bar {
    background: rgb(0, 75, 143);
    color: rgba(255,255,255,0.8);
    font-size: 13px;
    padding: 6px 0;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

    .top-bar span {
        display: inline-block;
        margin: 0 12px;
    }

@media (max-width: 600px) {
    .top-bar {
        font-size: 11px;
        padding: 4px 0;
    }

        .top-bar span {
            margin: 0 6px;
        }
}

/* ===== 头部导航 (移动优先) ===== */
.site-header {
    background: rgb(0, 75, 143);
    color: #fff;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.logo-img{
    float: left; /*浮动，使得导航栏的所有块级元素在一行*/
    width: 50px;
    height: 50px;
}
    .logo-img img {
        width: 100%;
        object-fit: fill;
    }
.logo-icon {
    font-size: clamp(20px, 5vw, 26px);
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

    .logo-icon span {
        color: var(--primary-light);
    }

.logo-sub {
    font-size: clamp(10px, 2vw, 12px);
    color: #8ab4d6;
    border-left: 1px solid rgba(255,255,255,0.15);
    padding-left: 8px;
    white-space: nowrap;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    padding: 4px 8px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

    .menu-toggle:focus {
        outline: none;
    }

.main-nav {
    display: flex;
    align-items: center;
}

    .main-nav ul {
        display: flex;
        list-style: none;
        gap: 12px;
        flex-wrap: wrap;
        margin: 0;
        padding: 0;
    }

    .main-nav a {
        color: #cce0f0;
        font-weight: 500;
        font-size: clamp(14px, 2vw, 16px);
        padding: 4px 0;
        border-bottom: 2px solid transparent;
        transition: var(--transition);
        white-space: nowrap;
    }

        .main-nav a:hover, .main-nav a.active {
            color: #fff;
            border-bottom-color: var(--primary-light);
        }

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-dark);
        padding: 16px 20px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.2);
        transform: scaleY(0);
        transform-origin: top center;
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
        border-top: 1px solid rgba(255,255,255,0.05);
    }

        .main-nav.open {
            transform: scaleY(1);
            opacity: 1;
            visibility: visible;
        }

        .main-nav ul {
            flex-direction: column;
            gap: 6px;
        }

            .main-nav ul li {
                width: 100%;
            }

        .main-nav a {
            display: block;
            padding: 10px 12px;
            font-size: 16px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            border-radius: var(--radius-sm);
        }

            .main-nav a:hover, .main-nav a.active {
                background: rgba(77, 184, 255, 0.1);
                border-bottom-color: var(--primary-light);
            }

    .logo-sub {
        display: none;
    }
}

/* ===== Hero 主横幅 ===== */
.hero {
    background: linear-gradient(135deg, #e6f0fa 0%, #cce0f0 100%);
    padding: clamp(40px, 10vw, 80px) 0;
    text-align: center;
    margin-bottom: 30px;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero-content {
    width: 100%;
}

.hero h1 {
    font-size: clamp(1.8rem, 6vw, 3.2rem);
    font-weight: 300;
    color: var(--primary-dark);
    margin-bottom: 12px;
    line-height: 1.2;
}

    .hero h1 strong {
        font-weight: 700;
        color: var(--primary-blue);
    }

.hero p {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 20px;
    padding: 0 16px;
}

.hero .btn-primary {
    display: inline-block;
    background: var(--primary-dark);
    color: #fff;
    padding: 12px 32px;
    border-radius: 40px;
    font-weight: 600;
    font-size: clamp(1rem, 2vw, 1.1rem);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 4px 12px rgba(10,37,64,0.15);
}

    .hero .btn-primary:active {
        transform: scale(0.96);
    }

    .hero .btn-primary:hover {
        background: var(--primary-blue);
        transform: translateY(-2px);
    }

/* ===== 通用标题 ===== */
.section-title {
    text-align: center;
    font-size: clamp(1.6rem, 4.5vw, 2.4rem);
    font-weight: 300;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

    .section-title span {
        font-weight: 700;
        color: var(--primary-blue);
    }

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 16px;
}

/* ===== 三大业务卡片 ===== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0 40px;
}

@media (max-width: 480px) {
    .business-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

.business-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-bottom: 4px solid var(--primary-light);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
}

    .business-card:active {
        transform: scale(0.98);
    }

    .business-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

    .business-card .icon {
        font-size: 2.8rem;
        display: block;
        margin-bottom: 12px;
    }

    .business-card h3 {
        font-size: 1.3rem;
        color: var(--primary-dark);
        margin-bottom: 8px;
    }

    .business-card p {
        color: var(--text-muted);
        font-size: 0.95rem;
        margin-bottom: 16px;
        flex: 1;
    }

    .business-card .btn-outline {
        display: inline-block;
        border: 1px solid var(--primary-blue);
        color: var(--primary-blue);
        padding: 6px 20px;
        border-radius: 30px;
        font-weight: 500;
        font-size: 0.95rem;
        transition: var(--transition);
        touch-action: manipulation;
    }

        .business-card .btn-outline:active {
            transform: scale(0.96);
        }

        .business-card .btn-outline:hover {
            background: var(--primary-blue);
            color: #fff;
        }

/* ===== 公司简介与应用领域 ===== */
.about-section {
    background: var(--white);
    padding: 30px 0;
    border-radius: var(--radius-lg);
    margin: 30px 0;
    box-shadow: var(--shadow-sm);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: center;
    padding: 0 20px;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 16px;
    }
}

.about-text h2 {
    color: var(--primary-dark);
    font-size: clamp(1.4rem, 4vw, 2rem);
    margin-bottom: 12px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 12px;
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.app-tag {
    background: #e6f0fa;
    padding: 4px 14px;
    border-radius: 30px;
    font-size: clamp(0.8rem, 1.2vw, 0.9rem);
    color: var(--primary-blue);
    white-space: nowrap;
}

.about-image {
    background: #cce0f0;
    border-radius: var(--radius-md);
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-weight: 500;
    font-size: clamp(1rem, 2vw, 1.2rem);
}

@media (max-width: 480px) {
    .about-image {
        min-height: 120px;
    }
}

/* ===== 联系与在线咨询 ===== */
.contact-cta {
    background: var(--primary-dark);
    color: #fff;
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    margin: 30px 0 40px;
}

    .contact-cta h3 {
        font-size: clamp(1.4rem, 4vw, 2rem);
        font-weight: 300;
        margin-bottom: 8px;
    }

    .contact-cta p {
        font-size: clamp(0.95rem, 1.5vw, 1.05rem);
        margin-bottom: 16px;
        opacity: 0.9;
    }

    .contact-cta .btn-light {
        background: var(--primary-light);
        color: var(--primary-dark);
        padding: 12px 32px;
        border-radius: 40px;
        font-weight: 600;
        font-size: clamp(1rem, 2vw, 1.1rem);
        display: inline-block;
        transition: var(--transition);
        border: none;
        cursor: pointer;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

        .contact-cta .btn-light:active {
            transform: scale(0.96);
        }

        .contact-cta .btn-light:hover {
            background: #fff;
            transform: scale(1.02);
        }

/* ===== 页脚 ===== */
.site-footer {
    background: #0d1f30;
    color: #8ab4d6;
    padding: 30px 0 16px;
    border-radius: 30px 30px 0 0;
    margin-top: 20px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

@media (max-width: 480px) {
    .footer-inner {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
}

.footer-copy {
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
}

.footer-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

    .footer-links a {
        color: #8ab4d6;
        font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    }

        .footer-links a:hover {
            color: #fff;
        }

/* ===== 移动端触摸优化 ===== */
.clickable {
    min-height: 44px;
    min-width: 44px;
}

* {
    -webkit-tap-highlight-color: transparent;
}

::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: #f0f0f0;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}

/* ===== 加载动画 ===== */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 核心业务聚焦 ===== */
.business-focus {
    margin: 30px 0;
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

@media (max-width: 480px) {
    .focus-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.focus-item {
    background: var(--white);
    padding: clamp(20px, 3vw, 30px) 16px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 4px solid var(--primary-light);
    transition: var(--transition);
}

    .focus-item:active {
        transform: scale(0.98);
    }

    .focus-item .icon {
        font-size: 2.2rem;
        display: block;
        margin-bottom: 8px;
    }

    .focus-item h4 {
        color: var(--primary-dark);
        font-size: clamp(1rem, 2vw, 1.1rem);
        margin-bottom: 4px;
    }

    .focus-item p {
        color: var(--text-muted);
        font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    }

/* ===== 发展历程 ===== */
.timeline {
    margin: 30px 0;
}

.timeline-item {
    display: flex;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    align-items: flex-start;
}

    .timeline-item:last-child {
        border-bottom: none;
    }

.timeline-year {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--primary-blue);
    min-width: 80px;
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .timeline-item {
        flex-direction: column;
        gap: 4px;
        padding: 12px 0;
    }

    .timeline-year {
        min-width: auto;
    }
}

.timeline-desc {
    color: var(--text-muted);
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
}

/* ===== 企业文化与团队 ===== */
.culture-section {
    background: #f0f5fa;
    padding: clamp(25px, 4vw, 45px);
    border-radius: var(--radius-lg);
    margin: 30px 0;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

@media (max-width: 480px) {
    .culture-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.culture-item {
    text-align: center;
    padding: 12px;
}

    .culture-item .num {
        font-size: clamp(1.8rem, 4vw, 2.4rem);
        font-weight: 700;
        color: var(--primary-light);
        display: block;
    }

    .culture-item h5 {
        color: var(--primary-dark);
        font-size: clamp(1rem, 2vw, 1.1rem);
        margin: 6px 0;
    }

    .culture-item p {
        color: var(--text-muted);
        font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    }
/* ===== 页面标题 ===== */
.page-header {
    background: linear-gradient(135deg, #e6f0fa 0%, #cce0f0 100%);
    padding: clamp(30px, 8vw, 60px) 0;
    text-align: center;
    margin-bottom: 30px;
}

.page-title {
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-weight: 300;
    color: var(--primary-dark);
}

    .page-title span {
        font-weight: 700;
        color: var(--primary-blue);
    }

.page-subtitle {
    color: var(--text-muted);
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-top: 4px;
}

/* ===== 业务概述 ===== */
.overview-section {
    background: var(--white);
    padding: clamp(20px, 3vw, 35px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

    .overview-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.4rem, 3vw, 1.8rem);
        margin-bottom: 12px;
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
    }

    .overview-section p {
        color: var(--text-muted);
        font-size: clamp(0.95rem, 1.5vw, 1.05rem);
        margin-bottom: 12px;
    }

    .overview-section .highlight {
        color: var(--primary-blue);
        font-weight: 600;
    }

/* ===== 二维筛选面板 ===== */
.filter-panel {
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 25px;
}
.filter-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
}
.filter-group2 {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

    .filter-group2 label {
        font-weight: 500;
        color: var(--text-muted);
        font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    }

    .filter-group2 select {
        padding: 8px 12px;
        border: 1px solid #dce0e5;
        border-radius: var(--radius-sm);
        background: var(--white);
        font-size: clamp(0.85rem, 1.5vw, 0.95rem);
        min-width: 140px;
        -webkit-appearance: none;
        appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234a6a8a' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        padding-right: 36px;
    }
.filter-group {
    margin-bottom: 12px;
}

    .filter-group:last-child {
        margin-bottom: 0;
    }

    .filter-group .filter-label {
        font-weight: 600;
        color: var(--primary-dark);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-right: 12px;
        display: inline-block;
        min-width: 60px;
    }
.filter-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

    .filter-actions .btn-reset {
        background: #e9ecef;
        border: none;
        padding: 8px 20px;
        border-radius: var(--radius-sm);
        font-weight: 500;
        font-size: clamp(0.85rem, 1.5vw, 0.95rem);
        cursor: pointer;
        transition: var(--transition);
        touch-action: manipulation;
        color: var(--text-dark);
    }

        .filter-actions .btn-reset:active {
            transform: scale(0.96);
        }

        .filter-actions .btn-reset:hover {
            background: #dde0e3;
        }

@media (max-width: 600px) {
    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group select {
        width: 100%;
    }

    .filter-actions {
        margin-left: 0;
        justify-content: flex-end;
    }
}

.filter-options {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.filter-btn {
    background: transparent;
    border: 1px solid #dce0e5;
    padding: 4px 14px;
    border-radius: 30px;
    font-size: clamp(0.8rem, 1.2vw, 0.9rem);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
}

    .filter-btn:active {
        transform: scale(0.96);
    }

    .filter-btn:hover {
        border-color: var(--primary-light);
        color: var(--primary-dark);
    }

    .filter-btn.active {
        background: var(--primary-dark);
        color: #fff;
        border-color: var(--primary-dark);
    }

@media (max-width: 480px) {
    .filter-btn {
        padding: 4px 10px;
        font-size: 0.75rem;
    }

    .filter-group .filter-label {
        min-width: 50px;
        font-size: 0.85rem;
    }
}

/* ===== 产品列表（卡片网格） ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

@media (max-width: 360px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 18px 16px 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 4px solid var(--primary-light);
    display: flex;
    flex-direction: column;
    -webkit-tap-highlight-color: transparent;
}

    .product-card:active {
        transform: scale(0.98);
    }

    .product-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

    .product-card .product-model {
        font-size: clamp(1rem, 2vw, 1.15rem);
        font-weight: 600;
        color: var(--primary-dark);
        margin-bottom: 2px;
    }

    .product-card .product-series {
        font-size: clamp(0.7rem, 1.2vw, 0.8rem);
        color: var(--primary-blue);
        background: #e6f0fa;
        display: inline-block;
        padding: 0 12px;
        border-radius: 30px;
        margin-bottom: 8px;
        align-self: flex-start;
    }

    .product-card .product-specs {
        color: var(--text-muted);
        font-size: clamp(0.8rem, 1.5vw, 0.9rem);
        flex: 1;
        margin-bottom: 10px;
    }

        .product-card .product-specs span {
            display: inline-block;
            background: #f0f5fa;
            padding: 2px 10px;
            border-radius: 30px;
            margin: 2px 4px 2px 0;
            font-size: clamp(0.7rem, 1.2vw, 0.8rem);
            color: var(--text-dark);
        }

    .product-card .btn-detail {
        background: transparent;
        border: 1px solid var(--primary-dark);
        color: var(--primary-dark);
        padding: 6px 16px;
        border-radius: 30px;
        cursor: pointer;
        transition: var(--transition);
        text-align: center;
        align-self: flex-start;
        font-weight: 500;
        font-size: clamp(0.85rem, 1.5vw, 0.9rem);
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

        .product-card .btn-detail:active {
            transform: scale(0.96);
        }

        .product-card .btn-detail:hover {
            background: var(--primary-dark);
            color: #fff;
        }

/* ===== 分页与空状态 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
    flex-wrap: wrap;
}

    .pagination a, .pagination span {
        display: inline-block;
        padding: 6px 14px;
        border-radius: var(--radius-sm);
        border: 1px solid #dce0e5;
        background: var(--white);
        color: var(--text-dark);
        transition: var(--transition);
        font-size: clamp(0.85rem, 1.5vw, 0.95rem);
        min-height: 40px;
        min-width: 40px;
        text-align: center;
    }

        .pagination a:hover {
            background: var(--primary-dark);
            color: #fff;
            border-color: var(--primary-dark);
        }

    .pagination .current {
        background: var(--primary-dark);
        color: #fff;
        border-color: var(--primary-dark);
    }

.empty-state {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
    grid-column: 1/-1;
}

/* ===== 应用领域 ===== */
.application-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin: 30px 0;
}

@media (max-width: 480px) {
    .application-section {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.app-item {
    background: var(--white);
    padding: 16px 12px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 4px solid var(--primary-light);
}

    .app-item .icon {
        font-size: 1.8rem;
        display: block;
        margin-bottom: 4px;
    }

    .app-item h4 {
        color: var(--primary-dark);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-bottom: 2px;
    }

    .app-item p {
        color: var(--text-muted);
        font-size: clamp(0.7rem, 1.2vw, 0.8rem);
    }
/* ===== 应用领域与特点 ===== */
.feature-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 30px 0;
}

@media (max-width: 480px) {
    .feature-section {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.feature-item {
    background: var(--white);
    padding: 18px 16px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 4px solid var(--primary-light);
}

    .feature-item .icon {
        font-size: 2rem;
        display: block;
        margin-bottom: 6px;
    }

    .feature-item h4 {
        color: var(--primary-dark);
        font-size: clamp(1rem, 1.8vw, 1.1rem);
        margin-bottom: 4px;
    }

    .feature-item p {
        color: var(--text-muted);
        font-size: clamp(0.8rem, 1.2vw, 0.85rem);
    }
/* ===== 联系信息与表单网格 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 25px;
    margin: 20px 0 30px;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.contact-info {
    background: var(--white);
    padding: clamp(20px, 3vw, 35px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

    .contact-info h3 {
        color: var(--primary-dark);
        margin-bottom: 16px;
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
    }

.info-item {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: flex-start;
}

    .info-item .icon {
        font-size: 1.4rem;
        min-width: 28px;
        color: var(--primary-blue);
    }

    .info-item .detail {
        color: var(--text-muted);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
    }

        .info-item .detail strong {
            color: var(--text-dark);
            display: block;
            font-weight: 600;
        }

.contact-form {
    background: var(--white);
    padding: clamp(20px, 3vw, 35px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

    .contact-form h3 {
        color: var(--primary-dark);
        margin-bottom: 16px;
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
    }

.form-group {
    margin-bottom: 16px;
}

    .form-group label {
        display: block;
        font-weight: 500;
        color: var(--text-dark);
        margin-bottom: 4px;
        font-size: clamp(0.9rem, 1.5vw, 1rem);
    }

        .form-group label .required {
            color: #dc3545;
        }

    .form-group input, .form-group textarea, .form-group select {
        width: 100%;
        padding: 10px 14px;
        border: 1px solid #dce0e5;
        border-radius: var(--radius-sm);
        font-size: clamp(0.95rem, 1.5vw, 1rem);
        transition: var(--transition);
        font-family: inherit;
        -webkit-appearance: none;
        appearance: none;
        background: var(--white);
    }

        .form-group input:focus, .form-group textarea:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px rgba(77, 184, 255, 0.15);
        }

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

.btn-submit {
    background: var(--primary-dark);
    color: #fff;
    border: none;
    padding: 12px 32px;
    border-radius: 40px;
    font-size: clamp(1rem, 2vw, 1.1rem);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

    .btn-submit:active {
        transform: scale(0.98);
    }

    .btn-submit:hover {
        background: var(--primary-blue);
    }

/* ===== 反馈消息 ===== */
.message-feedback {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: clamp(0.95rem, 1.5vw, 1rem);
}

.message-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===== 地图 ===== */
.map-section {
    margin: 20px 0 30px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.map-placeholder {
    background: #cce0f0;
    height: clamp(200px, 30vw, 300px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-weight: 500;
    font-size: clamp(1rem, 2vw, 1.2rem);
}
/* ===== 筛选工具栏 ===== */
.download-toolbar {
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 25px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
}
/* ===== 下载列表（卡片网格） ===== */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 10px;
}

.download-card {
    background: #fff;
    border-radius: 16px;
    padding: 25px 22px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: 0.3s;
    border-left: 5px solid #4db8ff;
    display: flex;
    flex-direction: column;
}

    .download-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    }

    .download-card .file-icon {
        font-size: 2.5rem;
        margin-bottom: 10px;
    }

    .download-card h4 {
        color: #0a2540;
        margin-bottom: 8px;
        font-size: 1.1rem;
    }

    .download-card .file-type {
        font-size: 0.8rem;
        color: #0066b3;
        background: #e6f0fa;
        padding: 2px 12px;
        border-radius: 30px;
        display: inline-block;
        align-self: flex-start;
        margin-bottom: 10px;
    }

    .download-card p {
        color: #4a6a8a;
        font-size: 0.95rem;
        flex: 1;
        margin-bottom: 15px;
    }

    .download-card .btn-download {
        background: #0a2540;
        color: #fff;
        border: none;
        padding: 8px 24px;
        border-radius: 30px;
        font-weight: 500;
        cursor: pointer;
        transition: 0.3s;
        text-align: center;
        align-self: flex-start;
    }

        .download-card .btn-download:hover {
            background: #004b8f;
        }

/* ===== 系统集成服务流程 ===== */
.process-section {
    background: #f0f5fa;
    padding: clamp(20px, 4vw, 40px) 0;
    border-radius: var(--radius-lg);
    margin: 30px 0;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

@media (max-width: 480px) {
    .process-steps {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.step-item {
    text-align: center;
    padding: 12px 8px;
}

    .step-item .step-num {
        display: inline-block;
        background: var(--primary-dark);
        color: #fff;
        width: 36px;
        height: 36px;
        line-height: 36px;
        border-radius: 50%;
        font-weight: 700;
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-bottom: 6px;
    }

    .step-item h5 {
        color: var(--primary-dark);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-bottom: 2px;
    }

    .step-item p {
        color: var(--text-muted);
        font-size: clamp(0.75rem, 1.2vw, 0.8rem);
    }
/* ===== 搜索栏 ===== */
.search-section {
    background: var(--white);
    padding: clamp(16px, 2vw, 24px);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

    .search-section h3 {
        color: var(--primary-dark);
        margin-bottom: 12px;
        font-size: clamp(1.1rem, 2vw, 1.2rem);
    }
.search-box {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

@media (max-width: 480px) {
    .news-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        margin-left: 0;
    }

    .filter-group select {
        width: 100%;
    }
}

.search-box input[type="text"] {
    border: 1px solid #dce0e5;
    border-radius: 40px;
    padding: 8px 16px;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    flex: 1;
    min-width: 150px;
    transition: var(--transition);
    -webkit-appearance: none;
    appearance: none;
}

.search-box input:focus {
    border-color: var(--primary-light);
    outline: none;
    box-shadow: 0 0 0 3px rgba(77,184,255,0.1);
}

.search-box .btn-search {
    background: var(--primary-dark);
    color: #fff;
    border: none;
    border-radius: 40px;
    padding: 8px 20px;
    font-weight: 600;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    cursor: pointer;
    transition: var(--transition);
    touch-action: manipulation;
    white-space: nowrap;
}

    .search-box .btn-search:active {
        transform: scale(0.96);
    }

    .search-box .btn-search:hover {
        background: var(--primary-blue);
    }
/* ===== 快速支持入口 ===== */
.quick-support {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 30px;
}

@media (max-width: 480px) {
    .quick-support {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
}

.quick-item {
    background: var(--white);
    padding: 16px 12px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-bottom: 4px solid var(--primary-light);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

    .quick-item:active {
        transform: scale(0.96);
    }

    .quick-item:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

    .quick-item .icon {
        font-size: 2rem;
        display: block;
        margin-bottom: 4px;
    }

    .quick-item h4 {
        color: var(--primary-dark);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-bottom: 2px;
    }

    .quick-item p {
        color: var(--text-muted);
        font-size: clamp(0.7rem, 1.2vw, 0.8rem);
    }
/* ===== FAQ 常见问题 ===== */
.faq-section {
    margin: 25px 0;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    padding: 14px 18px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--primary-dark);
    transition: var(--transition);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    font-size: clamp(0.95rem, 1.5vw, 1rem);
}

    .faq-question:active {
        background: #f8faff;
    }

    .faq-question:hover {
        background: #f8faff;
    }

    .faq-question .toggle-icon {
        font-size: 1.2rem;
        transition: var(--transition);
        flex-shrink: 0;
        margin-left: 12px;
    }

.faq-answer {
    padding: 0 18px 18px;
    color: var(--text-muted);
    display: none;
    line-height: 1.8;
    font-size: clamp(0.9rem, 1.5vw, 0.95rem);
}

    .faq-answer.active {
        display: block;
    }

/* ===== 联系与支持渠道 ===== */
.contact-channels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 25px 0;
}

@media (max-width: 480px) {
    .contact-channels {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.channel-item {
    background: var(--white);
    padding: 18px 16px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

    .channel-item .icon {
        font-size: 1.8rem;
        display: block;
        margin-bottom: 6px;
    }

    .channel-item h4 {
        color: var(--primary-dark);
        font-size: clamp(0.9rem, 1.5vw, 1rem);
        margin-bottom: 2px;
    }

    .channel-item p {
        color: var(--text-muted);
        font-size: clamp(0.75rem, 1.2vw, 0.85rem);
        margin-bottom: 4px;
    }

    .channel-item .btn-link {
        display: inline-block;
        background: var(--primary-dark);
        color: #fff;
        padding: 6px 16px;
        border-radius: 30px;
        font-size: clamp(0.8rem, 1.2vw, 0.85rem);
        font-weight: 500;
        transition: var(--transition);
        border: none;
        cursor: pointer;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

        .channel-item .btn-link:active {
            transform: scale(0.96);
        }

        .channel-item .btn-link:hover {
            background: var(--primary-blue);
        }
/* === 新闻区域 === */
.news-section {
    background: white;
    padding: 50px 30px;
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    margin: 60px 0;
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
}

    .news-header h2 {
        font-size: 1.8rem;
        font-weight: 300;
    }

        .news-header h2 span {
            font-weight: 700;
            color: #004b8f;
        }

.news-filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

    .news-filter .filter-btn {
        background: #f0f4fa;
        border: none;
        padding: 6px 18px;
        border-radius: 30px;
        font-size: 0.85rem;
        cursor: pointer;
        transition: background 0.2s, color 0.2s;
        color: #333;
    }

        .news-filter .filter-btn:hover,
        .news-filter .filter-btn.active {
            background: #004b8f;
            color: white;
        }

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.news-item {
    display: flex;
    padding: 14px 10px;
    border-bottom: 1px solid #f0f3f8;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

    .news-item:last-child {
        border-bottom: none;
    }

.news-date {
    color: #888;
    font-size: 0.9rem;
    min-width: 100px;
}

.news-category {
    background: #e7edf5;
    padding: 2px 14px;
    border-radius: 30px;
    font-size: 0.8rem;
    color: #004b8f;
    font-weight: 500;
}

.news-title {
    flex: 1;
    font-weight: 500;
}

    .news-title a {
        color: #222;
    }

        .news-title a:hover {
            color: #004b8f;
        }

.news-more {
    text-align: right;
    margin-top: 25px;
}

    .news-more a {
        font-weight: 500;
    }
/* ===== 大图标导航风格 ===== */
.camera-type-icons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 16px;
    background: var(--white);
    padding: 24px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.type-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 18px 12px;
    text-decoration: none;
    color: var(--text-muted);
    transition: all 0.3s ease;
    cursor: pointer;
    min-height: 110px;
    -webkit-tap-highlight-color: transparent;
}

    .type-icon:active {
        transform: scale(0.96);
    }

    .type-icon .icon {
        font-size: 2.8rem;
        display: block;
        line-height: 1;
    }

    .type-icon .label {
        font-size: 1.05rem;
        font-weight: 600;
        text-align: center;
        color: var(--text-dark);
    }

    .type-icon .sub-label {
        font-size: 0.8rem;
        color: var(--text-muted);
        text-align: center;
    }

    .type-icon:hover {
        border-color: var(--primary-light);
        background: #f0f7ff;
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }

    .type-icon.active {
        border-color: var(--primary-blue);
        background: #e6f0fa;
        box-shadow: 0 4px 16px rgba(0,75,143,0.12);
    }

        .type-icon.active .icon {
            transform: scale(1.05);
        }

        .type-icon.active .label {
            color: var(--primary-blue);
        }

/* 移动端适配 */
@media (max-width: 600px) {
    .camera-type-icons {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        padding: 16px 12px;
    }

    .type-icon {
        min-height: 90px;
        padding: 14px 8px;
    }

        .type-icon .icon {
            font-size: 2.2rem;
        }

        .type-icon .label {
            font-size: 0.9rem;
        }

        .type-icon .sub-label {
            font-size: 0.7rem;
        }
}

@media (max-width: 400px) {
    .camera-type-icons {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 12px 8px;
    }

    .type-icon {
        min-height: 75px;
        padding: 10px 6px;
    }

        .type-icon .icon {
            font-size: 1.8rem;
        }

        .type-icon .label {
            font-size: 0.75rem;
        }
}
/* ===== 面包屑导航 ===== */
.breadcrumb {
    padding: 16px 0 8px;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    color: var(--text-muted);
}

    .breadcrumb a {
        color: var(--primary-blue);
    }

        .breadcrumb a:hover {
            color: var(--primary-dark);
        }

    .breadcrumb .sep {
        margin: 0 6px;
    }

/* ===== 产品概况区 ===== */
.product-overview {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 30px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 16px 0 25px;
}

@media (max-width: 768px) {
    .product-overview {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.product-image {
    background: #eef3f8;
    border-radius: var(--radius-md);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

    .product-image img {
        max-width: 100%;
        max-height: 300px;
        object-fit: contain;
        border-radius: var(--radius-sm);
    }

.product-info h1 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.product-info .series-tag {
    display: inline-block;
    background: #e6f0fa;
    padding: 2px 16px;
    border-radius: 30px;
    color: var(--primary-blue);
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    margin-bottom: 12px;
}

.product-info .short-desc {
    color: var(--text-muted);
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    margin-bottom: 16px;
}

.product-info .status-badge {
    display: inline-block;
    background: #d4edda;
    color: #155724;
    padding: 4px 16px;
    border-radius: 30px;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    font-weight: 500;
}

/* ===== 参数表格 ===== */
.spec-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

    .spec-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px 20px;
}

@media (max-width: 480px) {
    .spec-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}

.spec-item {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    border-bottom: 1px solid #f0f3f8;
}

    .spec-item .label {
        font-size: clamp(0.8rem, 1.2vw, 0.85rem);
        color: var(--text-muted);
        font-weight: 500;
    }

    .spec-item .value {
        font-size: clamp(0.95rem, 1.5vw, 1.05rem);
        color: var(--text-dark);
        font-weight: 600;
    }

/* ===== 详细描述区 ===== */
.desc-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

    .desc-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

    .desc-section .content {
        color: var(--text-muted);
        font-size: clamp(0.95rem, 1.5vw, 1.05rem);
        line-height: 1.8;
    }

        .desc-section .content p {
            margin-bottom: 1em;
        }

        .desc-section .content ul {
            margin-left: 20px;
            margin-bottom: 1em;
        }

/* ===== 资料下载区 ===== */
.download-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

    .download-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

.download-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
}

@media (max-width: 480px) {
    .download-list {
        grid-template-columns: 1fr;
    }
}

.download-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #f8faff;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: 1px solid transparent;
}

    .download-item:hover {
        border-color: var(--primary-light);
        background: #f0f7ff;
    }

    .download-item .icon {
        font-size: 1.8rem;
    }

    .download-item .info {
        flex: 1;
    }

        .download-item .info .title {
            font-weight: 600;
            color: var(--text-dark);
            font-size: clamp(0.9rem, 1.5vw, 0.95rem);
        }

        .download-item .info .size {
            font-size: clamp(0.7rem, 1.2vw, 0.8rem);
            color: var(--text-muted);
        }

    .download-item .btn-down {
        background: var(--primary-dark);
        color: #fff;
        border: none;
        padding: 4px 16px;
        border-radius: 30px;
        font-size: clamp(0.8rem, 1.2vw, 0.85rem);
        cursor: pointer;
        transition: var(--transition);
        touch-action: manipulation;
        white-space: nowrap;
    }

        .download-item .btn-down:active {
            transform: scale(0.96);
        }

        .download-item .btn-down:hover {
            background: var(--primary-blue);
        }

/* ===== 相关产品推荐 ===== */
.related-section {
    margin: 20px 0 30px;
}

    .related-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

@media (max-width: 480px) {
    .related-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

.related-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-bottom: 3px solid var(--primary-light);
}

    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

    .related-card .thumb {
        background: #eef3f8;
        border-radius: var(--radius-sm);
        min-height: 80px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 8px;
    }

        .related-card .thumb img {
            max-width: 100%;
            max-height: 80px;
            object-fit: contain;
        }

    .related-card .name {
        font-weight: 600;
        color: var(--text-dark);
        font-size: clamp(0.9rem, 1.5vw, 0.95rem);
    }

        .related-card .name a {
            color: var(--text-dark);
        }

            .related-card .name a:hover {
                color: var(--primary-blue);
            }
/* ===== 规格参数表 ===== */
.spec-table-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

    .spec-table-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

.spec-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
}

    .spec-table thead th {
        background: var(--primary-dark);
        color: #fff;
        padding: 10px 16px;
        text-align: left;
        font-weight: 600;
        white-space: nowrap;
    }

    .spec-table tbody tr {
        border-bottom: 1px solid #eef3f8;
    }

        .spec-table tbody tr:last-child {
            border-bottom: none;
        }

    .spec-table tbody td {
        padding: 10px 16px;
        color: var(--text-dark);
    }

        .spec-table tbody td:first-child {
            font-weight: 600;
            color: var(--text-muted);
            width: 40%;
        }

    .spec-table tbody tr:nth-child(even) {
        background: #f8faff;
    }

    .spec-table tbody tr:hover {
        background: #f0f7ff;
    }

/* ===== 光谱曲线 ===== */
.spectrum-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: clamp(20px, 3vw, 35px);
    box-shadow: var(--shadow-sm);
    margin: 20px 0;
}

    .spectrum-section h2 {
        color: var(--primary-dark);
        font-size: clamp(1.3rem, 3vw, 1.6rem);
        border-left: 4px solid var(--primary-light);
        padding-left: 12px;
        margin-bottom: 16px;
    }

.spectrum-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

@media (max-width: 768px) {
    .spectrum-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.spectrum-image {
    background: #f8faff;
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    border: 1px solid #eef3f8;
}

    .spectrum-image img {
        max-width: 100%;
        max-height: 240px;
        object-fit: contain;
    }

.spectrum-desc p {
    color: var(--text-muted);
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    margin-bottom: 12px;
    line-height: 1.8;
}

.spectrum-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.spec-tag {
    background: #e6f0fa;
    padding: 4px 16px;
    border-radius: 30px;
    font-size: clamp(0.8rem, 1.2vw, 0.9rem);
    color: var(--primary-dark);
}