/* ===== 全局重置 & 基础 ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'PingFang SC', 'Helvetica Neue', Roboto, Arial, sans-serif;
            background: #f5f7fa;
            color: #2c3e50;
            line-height: 1.6;
            scroll-behavior: smooth;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 商务稳重蓝 色彩体系 ===== */
        :root {
            --primary: #0a2a5a;
            --primary-light: #1a5a9a;
            --primary-dark: #051a3a;
            --accent: #c9a84c;
            --accent-light: #e0c56a;
            --bg-light: #f5f7fa;
            --white: #ffffff;
            --text-dark: #1a2a3a;
            --text-muted: #5a6a7a;
            --shadow-sm: 0 4px 20px rgba(10, 42, 90, 0.08);
            --shadow-md: 0 12px 40px rgba(10, 42, 90, 0.12);
            --shadow-lg: 0 24px 60px rgba(10, 42, 90, 0.18);
            --radius: 12px;
            --radius-lg: 20px;
            --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 8px;
        }

        /* ===== 导航 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 42, 90, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.4s;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding-top: 0;
            padding-bottom: 0;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 24px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 1px;
            flex-shrink: 0;
        }
        .nav-brand .brand-name {
            color: var(--white);
        }
        .nav-brand .brand-divider {
            color: var(--accent);
            margin: 0 2px;
        }
        .nav-brand .brand-tag {
            color: var(--accent-light);
            font-weight: 400;
            font-size: 18px;
        }
        .nav-phone {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-light);
            font-size: 18px;
            font-weight: 600;
            letter-spacing: 1px;
            /*background: rgba(255, 255, 255, 0.06);*/
            padding: 8px 20px;
            border-radius: 40px;
            border: 1px solid rgba(201, 168, 76, 0.25);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-phone:hover {
            background: rgba(201, 168, 76, 0.12);
            border-color: var(--accent);
        }
        .nav-phone .phone-icon {
            font-size: 20px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-menu li a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            padding: 4px 0;
        }
        .nav-menu li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-menu li a:hover {
            color: var(--white);
        }
        .nav-menu li a:hover::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }
        .nav-toggle span {
            width: 28px;
            height: 2.5px;
            background: var(--white);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* 移动端导航 */
        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(10, 42, 90, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                gap: 0;
                padding: 20px 24px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 2px solid var(--accent);
                pointer-events: none;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu li a {
                display: block;
                padding: 14px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                font-size: 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .navbar .container {
                height: 64px;
            }
            .nav-brand {
                font-size: 20px;
            }
            .nav-brand .brand-tag {
                font-size: 15px;
            }
            .nav-phone {
                font-size: 14px;
                padding: 6px 14px;
                gap: 4px;
            }
            .nav-phone .phone-icon {
                font-size: 16px;
            }
        }
        @media (max-width: 480px) {
            .nav-phone span.phone-text {
                display: none;
            }
            .nav-phone {
                padding: 6px 12px;
                font-size: 14px;
            }
            .nav-brand {
                font-size: 17px;
            }
            .nav-brand .brand-tag {
                font-size: 13px;
            }
        }

        /* ===== 移动端 悬浮拨号 ===== */
        .float-phone {
            position: fixed;
            bottom: 28px;
            right: 28px;
            z-index: 9999;
            width: 60px;
            height: 60px;
            background: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            box-shadow: 0 8px 30px rgba(10, 42, 90, 0.4);
            transition: var(--transition);
            animation: pulse-phone 2.4s ease-in-out infinite;
            border: 2px solid var(--accent);
        }
        .float-phone:hover {
            transform: scale(1.08);
            background: var(--primary-light);
        }
        @keyframes pulse-phone {
            0%,
            100% {
                box-shadow: 0 8px 30px rgba(10, 42, 90, 0.4);
            }
            50% {
                box-shadow: 0 8px 50px rgba(10, 42, 90, 0.65);
            }
        }
        @media (min-width: 769px) {
            .float-phone {
                display: none;
            }
        }

        /* ===== Banner ===== */
        .banner {
            padding: 140px 0 100px;
            background: linear-gradient(135deg, #051a3a 0%, #0a2a5a 40%, #1a5a9a 80%, #0a2a5a 100%);
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(201, 168, 76, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(26, 90, 154, 0.25) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(10, 42, 90, 0.6) 0%, transparent 50%);
            pointer-events: none;
        }
        .banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(to top, #f5f7fa, transparent);
            pointer-events: none;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .banner-content {
            max-width: 960px;
            margin: 0 auto;
        }
        .banner-tag {
            display: inline-block;
            background: rgba(201, 168, 76, 0.15);
            border: 1px solid rgba(201, 168, 76, 0.3);
            color: var(--accent-light);
            padding: 6px 24px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 2px;
            margin-bottom: 28px;
            animation: fadeInDown 0.8s ease forwards;
        }
        .banner-title {
            font-size: 48px;
            font-weight: 700;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: 18px;
            animation: fadeInUp 1s ease forwards;
        }
        .banner-title .highlight {
            color: var(--accent-light);
        }
        .banner-sub {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 720px;
            margin: 0 auto 32px;
            font-weight: 300;
            animation: fadeInUp 1.2s ease forwards;
        }
        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 16px;
            animation: fadeInUp 1.4s ease forwards;
        }
        .banner-stat-item {
            text-align: center;
        }
        .banner-stat-item .num {
            font-size: 36px;
            font-weight: 700;
            color: var(--accent-light);
            line-height: 1.2;
        }
        .banner-stat-item .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 1px;
        }
        .banner-phone-line {
            margin-top: 32px;
            font-size: 20px;
            color: var(--accent-light);
            font-weight: 500;
            animation: fadeInUp 1.6s ease forwards;
            letter-spacing: 2px;
        }
        .banner-phone-line strong {
            font-size: 26px;
            color: var(--white);
            font-weight: 700;
            background: rgba(201, 168, 76, 0.15);
            padding: 4px 18px;
            border-radius: 40px;
            border: 1px solid rgba(201, 168, 76, 0.2);
            margin-left: 8px;
        }

        /* Banner 动效 */
        @keyframes fadeInUp {
            0% {
                opacity: 0;
                transform: translateY(40px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @keyframes fadeInDown {
            0% {
                opacity: 0;
                transform: translateY(-20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .banner-title span {
            display: inline-block;
            animation: letterGlow 3s ease-in-out infinite alternate;
        }
        @keyframes letterGlow {
            0% {
                text-shadow: 0 0 20px rgba(201, 168, 76, 0.1);
            }
            100% {
                text-shadow: 0 0 40px rgba(201, 168, 76, 0.3);
            }
        }

        @media (max-width: 768px) {
            .banner {
                padding: 110px 0 70px;
                min-height: auto;
            }
            .banner-title {
                font-size: 28px;
            }
            .banner-sub {
                font-size: 16px;
            }
            .banner-stats {
                gap: 24px;
            }
            .banner-stat-item .num {
                font-size: 28px;
            }
            .banner-phone-line {
                font-size: 16px;
            }
            .banner-phone-line strong {
                font-size: 20px;
                padding: 2px 14px;
            }
            .banner-tag {
                font-size: 12px;
                padding: 4px 16px;
            }
        }

        /* ===== 通用标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            display: inline-block;
            letter-spacing: 2px;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            margin: 14px auto 0;
            border-radius: 4px;
        }
        .section-title p {
            color: var(--text-muted);
            font-size: 16px;
            margin-top: 12px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 26px;
            }
            .section-title p {
                font-size: 14px;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* ===== 滚动渐显 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 公司介绍 ===== */
        .about-section {
            padding: 80px 0;
            background: var(--white);
        }
        .about-inner {
            display: flex;
            gap: 56px;
            align-items: center;
        }
        .about-text {
            flex: 1;
            min-width: 0;
        }
        .about-text .company-name {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .about-text .company-sub {
            color: var(--primary-light);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border-left: 3px solid var(--accent);
            padding-left: 16px;
        }
        .about-text p {
            color: var(--text-dark);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .about-text .about-phone {
            display: inline-block;
            background: var(--primary);
            color: var(--white);
            padding: 8px 28px;
            border-radius: 40px;
            font-size: 18px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-top: 8px;
            border: 1px solid var(--accent);
            transition: var(--transition);
        }
        .about-text .about-phone:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .about-image {
            flex-shrink: 0;
            width: 600px;
            max-width: 100%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            background: var(--bg-light);
        }
        .about-image img {
            width: 100%;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .about-image:hover img {
            transform: scale(1.02);
        }

        @media (max-width: 992px) {
            .about-inner {
                flex-direction: column;
                gap: 32px;
            }
            .about-image {
                width: 100%;
            }
            .about-image img {
                height: 300px;
            }
            .about-text .company-name {
                font-size: 22px;
            }
        }
        @media (max-width: 480px) {
            .about-image img {
                height: 200px;
            }
            .about-text .about-phone {
                font-size: 15px;
                padding: 6px 18px;
            }
        }

        /* ===== 产品区域 ===== */
        .products-section {
            padding: 80px 0;
            background: var(--bg-light);
        }
        .product-series {
            margin-bottom: 64px;
        }
        .product-series:last-child {
            margin-bottom: 0;
        }
        .series-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .series-header h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            padding-left: 20px;
        }
        .series-header h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background: linear-gradient(180deg, var(--accent), var(--accent-light));
            border-radius: 4px;
        }
        .series-header .series-count {
            color: var(--text-muted);
            font-size: 14px;
            background: var(--white);
            padding: 4px 16px;
            border-radius: 40px;
            border: 1px solid #e8ecf0;
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .product-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: default;
            position: relative;
        }
        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .product-card .img-wrap {
            position: relative;
            width: 100%;
            padding-bottom: 100%;
            /* 正方形 */
            overflow: hidden;
            background: #f0f2f6;
        }
        .product-card .img-wrap img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .img-wrap img {
            transform: scale(1.06);
        }
        .product-card .p-name {
            padding: 14px 16px 16px;
            text-align: center;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.5px;
            background: var(--white);
            border-top: 1px solid #f0f2f6;
        }
        .product-card .p-name .a-tag {
            color: var(--accent);
            font-weight: 500;
            margin-right: 4px;
        }

        @media (max-width: 992px) {
            .product-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 640px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .series-header h3 {
                font-size: 20px;
                padding-left: 14px;
            }
            .product-card .p-name {
                font-size: 13px;
                padding: 10px 10px 12px;
            }
        }
        @media (max-width: 400px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
        }

        /* ===== 生产实力 ===== */
        .strength-section {
            padding: 80px 0;
            background: var(--white);
        }
        .strength-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .strength-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .strength-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-left-color: var(--accent);
        }
        .strength-card .s-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .strength-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .strength-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .strength-card .highlight-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 4px;
        }

        /* ===== 资质荣誉 ===== */
        .cert-section {
            padding: 80px 0;
            background: var(--bg-light);
        }
        .cert-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            text-align: center;
        }
        .cert-item {
            background: var(--white);
            border-radius: var(--radius);
            padding: 28px 16px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid #e8ecf0;
        }
        .cert-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .cert-item .cert-icon {
            font-size: 40px;
            margin-bottom: 10px;
        }
        .cert-item h5 {
            font-size: 15px;
            color: var(--primary);
            font-weight: 600;
        }
        .cert-item p {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 工程业绩 ===== */
        .cases-section {
            padding: 80px 0;
            background: var(--white);
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .case-item {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 24px 20px;
            transition: var(--transition);
            border-left: 3px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .case-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-left-color: var(--accent);
        }
        .case-item h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .case-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 底部 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 28px;
        }
        .footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
        }
        .footer-brand .ft-tag {
            color: var(--accent-light);
            font-weight: 400;
            font-size: 16px;
        }
        .footer-info p {
            font-size: 14px;
            margin-top: 6px;
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-contact {
            text-align: right;
        }
        .footer-contact .ft-phone {
            font-size: 22px;
            font-weight: 600;
            color: var(--accent-light);
            letter-spacing: 1px;
        }
        .footer-contact .ft-phone-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-links {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            margin-top: 8px;
        }
        .footer-links .friend-links,
        .footer-links .all-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
            transition: var(--transition);
            padding: 2px 0;
        }
        .footer-links a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-top {
                flex-direction: column;
                text-align: center;
            }
            .footer-contact {
                text-align: center;
            }
            .footer-contact .ft-phone {
                font-size: 18px;
            }
            .footer {
                padding: 32px 0 20px;
            }
        }

        /* ===== 通用滚动渐显辅助 ===== */
        .reveal-delay-1 {
            transition-delay: 0.1s;
        }
        .reveal-delay-2 {
            transition-delay: 0.2s;
        }
        .reveal-delay-3 {
            transition-delay: 0.3s;
        }
        .reveal-delay-4 {
            transition-delay: 0.4s;
        }
        .reveal-delay-5 {
            transition-delay: 0.5s;
        }

        /* ===== 平滑滚动 ===== */
        html {
            scroll-behavior: smooth;
        }

        /* ===== 段落间距 ===== */
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-light {
            display: inline-block;
            padding: 10px 32px;
            border: 1.5px solid var(--accent);
            color: var(--accent-light);
            border-radius: 40px;
            font-weight: 500;
            transition: var(--transition);
            background: transparent;
            font-size: 15px;
        }
        .btn-outline-light:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }

        /* 页内锚点偏移补偿 */
        .anchor-offset {
            display: block;
            position: relative;
            top: -80px;
            visibility: hidden;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 992px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
        }