:root {
    --primary: #1e3a8a;
    --primary-hover: #1d4ed8;
    --secondary: #f97316;
    --secondary-hover: #ea580c;
    --dark: #0f172a;
    --gray-bg: #f8fafc;
    --border: #e2e8f0;
    --text: #334155;
    --text-muted: #64748b;
    --success: #16a34a;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background-color: #ffffff;
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部条 */
.top-bar {
    background: #0f172a;
    color: #94a3b8;
    font-size: 13px;
    padding: 8px 0;
}

.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-contacts span {
    margin-right: 20px;
}

.top-contacts a {
    color: #cbd5e1;
}

.top-contacts a:hover {
    color: #ffffff;
}

.lang-switcher select {
    background: #1e293b;
    color: #f8fafc;
    border: 1px solid #334155;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
}

/* 主导航条 */
.navbar {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 32px;
    color: var(--primary);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
}

.logo-tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--dark);
    font-weight: 600;
    font-size: 15px;
    padding: 6px 0;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

/* 按钮规范 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: #ffffff;
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #ffffff;
}

.btn-success {
    background: var(--success);
    color: #ffffff;
}

.btn-success:hover {
    background: #15803d;
    color: #ffffff;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 30px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 70px 0;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.badge-tag {
    display: inline-block;
    background: rgba(249, 115, 22, 0.2);
    border: 1px solid var(--secondary);
    color: #fdba74;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 44px;
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 17px;
    color: #cbd5e1;
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 30px;
    border-top: 1px solid rgba(255,255,255,0.15);
    padding-top: 25px;
}

.stat-item strong {
    display: block;
    font-size: 26px;
    font-weight: 800;
    color: #ffffff;
}

.stat-item span {
    font-size: 13px;
    color: #94a3b8;
}

.hero-image img {
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.3);
}

/* 资质横幅 */
.cert-bar {
    background: #f1f5f9;
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

.cert-bar-inner {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
}

.cert-item {
    font-weight: 700;
    color: #475569;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-item i {
    color: var(--primary);
    font-size: 18px;
}

/* 通用 Section 样式 */
.section {
    padding: 70px 0;
}

.bg-light {
    background: var(--gray-bg);
}

.section-title-wrap {
    margin-bottom: 40px;
}

.section-title-wrap.text-center {
    text-align: center;
}

.section-title-wrap h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 10px;
}

.section-title-wrap p {
    font-size: 16px;
    color: var(--text-muted);
}

.section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 35px;
}

/* 分类卡片网格 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 25px;
}

.category-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 25px;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cat-icon-box {
    width: 60px;
    height: 60px;
    background: #eff6ff;
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 20px;
}

.category-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.category-card p {
    font-size: 14px;
    color: var(--text-muted);
    flex-grow: 1;
    margin-bottom: 20px;
}

.cat-link {
    font-weight: 600;
    font-size: 14px;
    color: var(--primary);
}

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 25px;
}

.product-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.2s;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.prod-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    z-index: 10;
}

.prod-img-wrap {
    height: 230px;
    background: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.prod-img-wrap img {
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

.product-card:hover .prod-img-wrap img {
    transform: scale(1.04);
}

.prod-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.prod-cat-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.prod-title {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    height: 44px;
    overflow: hidden;
}

.prod-title a {
    color: var(--dark);
}

.prod-title a:hover {
    color: var(--primary);
}

.prod-quick-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.spec-pill {
    background: #f1f5f9;
    color: #475569;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
}

.prod-footer {
    display: flex;
    gap: 10px;
    margin-top: auto;
}

.prod-footer .btn {
    flex: 1;
}

/* 实力网格 */
.strength-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.strength-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 25px;
}

.strength-card .icon-wrap {
    font-size: 32px;
    color: var(--secondary);
    margin-bottom: 18px;
}

.strength-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark);
}

.strength-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* CTA 横幅 */
.cta-banner {
    background: #0f172a;
    color: #ffffff;
    padding: 60px 0;
}

.cta-banner-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.cta-content h2 {
    font-size: 30px;
    margin-bottom: 10px;
}

.cta-content p {
    color: #94a3b8;
    max-width: 650px;
}

.cta-btns {
    display: flex;
    gap: 15px;
}

/* 详情页布局 */
.page-header {
    background: var(--gray-bg);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
}

.page-header.compact {
    padding: 16px 0;
}

.breadcrumb {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.product-detail-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 45px;
    margin-bottom: 50px;
}

.main-image-viewport {
    height: 420px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 25px;
    margin-bottom: 15px;
}

.main-image-viewport img {
    max-height: 100%;
    object-fit: contain;
}

.thumb-strip {
    display: flex;
    gap: 12px;
    margin-bottom: 25px;
}

.thumb-item {
    width: 75px;
    height: 75px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 6px;
    background: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: center;
}

.thumb-item.active, .thumb-item:hover {
    border-color: var(--primary);
}

.thumb-item img {
    max-height: 100%;
    object-fit: contain;
}

.guarantee-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius);
    padding: 15px;
}

.g-item {
    font-size: 13px;
    color: #1e40af;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.g-item:last-child {
    margin-bottom: 0;
}

.detail-badges {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.badge-item-no {
    background: #e2e8f0;
    color: var(--dark);
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 4px;
}

.badge-cat {
    background: #dbeafe;
    color: #1e40af;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
}

.detail-title {
    font-size: 30px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 12px;
}

.detail-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.features-list-box {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 30px;
}

.features-list-box h4 {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.features-list-box ul {
    padding-left: 20px;
}

.features-list-box li {
    font-size: 14px;
    margin-bottom: 8px;
    color: #475569;
}

.detail-cta-box {
    margin-top: 30px;
}

.cta-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 12px;
}

.cta-note {
    font-size: 13px;
    color: var(--text-muted);
}

/* 参数规格展示区（有值才显示的核心样式） */
.specs-section {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 35px;
    margin-bottom: 40px;
}

.specs-header {
    border-bottom: 2px solid var(--primary);
    padding-bottom: 12px;
    margin-bottom: 25px;
}

.specs-header h2 {
    font-size: 22px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.specs-header p {
    font-size: 14px;
    color: var(--text-muted);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

.spec-card h3 {
    font-size: 16px;
    color: var(--primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
    margin-bottom: 15px;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
}

.spec-table tr {
    border-bottom: 1px solid #f1f5f9;
}

.spec-table td {
    padding: 10px 8px;
    font-size: 14px;
    vertical-align: top;
}

.spec-label {
    width: 45%;
    font-weight: 600;
    color: #475569;
    background: #f8fafc;
}

.spec-val {
    color: var(--dark);
}

/* 详情页大表单 */
.section-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 35px;
    margin-bottom: 40px;
}

.inquiry-box-header h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.inquiry-box-header p {
    color: var(--text-muted);
    margin-bottom: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #334155;
    margin-bottom: 6px;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-submit-row {
    text-align: center;
    margin-top: 10px;
}

.form-status-msg {
    margin-top: 15px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
}

.form-status-msg.success {
    color: var(--success);
}

.form-status-msg.error {
    color: #dc2626;
}

/* 分类过滤胶囊 */
.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 35px;
}

.filter-pill {
    padding: 8px 18px;
    border: 1px solid var(--border);
    background: #ffffff;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: #475569;
}

.filter-pill.active, .filter-pill:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* 浮动沟通按钮 */
.floating-contact {
    position: fixed;
    right: 25px;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 24px;
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
    transition: transform 0.2s;
}

.float-btn:hover {
    transform: scale(1.1);
    color: #ffffff;
}

.float-btn.whatsapp {
    background: #25d366;
}

.float-btn.inquiry {
    background: var(--secondary);
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-card {
    background: #ffffff;
    width: 90%;
    max-width: 600px;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 18px;
    color: var(--dark);
}

.close-btn {
    background: none;
    border: none;
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    color: var(--text-muted);
}

.inq-prod-hint {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 18px;
}

/* 页脚 */
.footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid #1e293b;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 15px;
}

.footer-desc {
    font-size: 14px;
    color: #94a3b8;
    margin-bottom: 20px;
}

.footer-socials {
    display: flex;
    gap: 12px;
}

.footer-socials a {
    width: 36px;
    height: 36px;
    background: #1e293b;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 16px;
}

.footer-socials a:hover {
    background: var(--primary);
}

.footer-col h4 {
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #94a3b8;
    font-size: 14px;
}

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

.footer-contact-info {
    list-style: none;
    font-size: 14px;
    color: #94a3b8;
}

.footer-contact-info li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact-info i {
    color: var(--secondary);
    margin-top: 4px;
}

.footer-bottom {
    padding: 25px 0;
    font-size: 13px;
    color: #64748b;
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 响应式 */
@media (max-width: 900px) {
    .hero-container, .product-detail-layout, .footer-grid, .about-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .nav-links {
        display: none;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}