:root {
            --pri: #0b1e33;
            --pri2: #112d4e;
            --accent: #e8943a;
            --accent-hover: #d17a28;
            --white: #ffffff;
            --bg-light: #f5f6f8;
            --text-dark: #1a1a1a;
            --text-mid: #2a2a2a;
            --text-heading: #0b1e33;
            --border: #d9dde3;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
            --radius: 8px;
            --radius-sm: 5px;
            --max-width: 1500px;
            --font-sm: 16px;
            --font-md: 18px;
            --font-lg: 20px;
            --font-xl: 26px;
            --font-2xl: 34px;
            --font-3xl: 44px;
            --font-hero: 48px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-dark);
            background: #fff;
            line-height: 1.6;
            font-size: var(--font-sm);
            -webkit-font-smoothing: antialiased;
        }

        /* ========== HEADER ========== */
        .header-bar {
            background: #fff;
            border-bottom: 2px solid #e8eaef;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 20px;
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 10px 0;
            gap: 14px;
        }
        .header-logo img { height: 48px; width: auto; display: block; }
        .header-contact {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 20px;
            color: var(--text-dark);
            font-weight: 600;
        }
        .header-contact a {
            color: var(--text-dark);
            text-decoration: none;
            white-space: nowrap;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-contact a:hover { color: var(--accent); }
        .header-contact a i { color: var(--accent); font-size: 16px; width: 18px; text-align: center; }
        .btn-inquiry-sm {
            display: inline-block;
            background: var(--accent);
            color: #fff !important;
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 700;
            font-size: var(--font-sm);
            text-decoration: none;
            cursor: pointer;
            transition: all 0.25s;
            white-space: nowrap;
            border: none;
            letter-spacing: 0.4px;
        }
        .btn-inquiry-sm:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(232,148,58,0.35);
        }

        /* 移动端隐藏联系方式，仅显示logo */
        @media (max-width: 768px) {
            .header-contact { display: none; }
        }

        /* ========== BANNER ========== */
        .banner-wrap {
            position: relative;
            background: rgba(0, 0, 0, 0.5) url(/jiale-ventilation/2025/12/29/banner-2-1.jpg) no-repeat center;
            background-size: cover;        /* 填满容器，无黑边 */
            background-position: center;
            background-repeat: no-repeat;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
            margin-top: 0!important;
            background-blend-mode: darken;
        }
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.45);
            z-index: 2;
        }
        .banner-inner {
            position: relative;
            z-index: 3;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 50px 30px;
            display: flex;
            align-items: center;
            gap: 40px;
            width: 100%;
            flex-wrap: wrap;
        }
        .banner-left {
            flex: 1 1 480px;
            min-width: 300px;
            color: #fff;
        }
        .banner-left h1 {
            font-size: var(--font-hero);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #ffffff;
            text-shadow: 0 2px 8px rgba(0,0,0,0.4);
            letter-spacing: -0.5px;
        }
        .banner-left h1 span { color: var(--accent); }
        .banner-left .sub-tagline {
            font-size: var(--font-lg);
            margin-bottom: 8px;
            color: #e8e8e8;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .banner-left .bullets {
            list-style: none;
            margin: 18px 0 24px;
            font-size: 20px;
            color: #dcdcdc;
        }
        .banner-left .bullets li {
            padding: 6px 0 6px 26px;
            position: relative;
            font-weight: 500;
        }
        .banner-left .bullets li::before {
            content: '\2713';
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: 700;
            font-size: 18px;
        }
        .banner-left .btn-cta-lg {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 16px 40px;
            border-radius: 36px;
            font-weight: 700;
            font-size: var(--font-lg);
            text-decoration: none;
            cursor: pointer;
            transition: all 0.3s;
            border: none;
            letter-spacing: 0.5px;
            box-shadow: 0 6px 22px rgba(232,148,58,0.5);
        }
        .banner-left .btn-cta-lg:hover {
            background: #f0a040;
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(232,148,58,0.6);
        }

        .banner-right {
            flex: 0 0 400px;
            background: #fff;
            border-radius: 12px;
            padding: 30px 28px;
            box-shadow: 0 12px 40px rgba(0,0,0,0.25);
            color: #1a1a1a;
        }
        .banner-right h3 { font-size: var(--font-xl); margin-bottom: 6px; color: var(--text-heading); font-weight: 700; }
        .banner-right .form-subtitle { font-size: var(--font-sm); color: #555; margin-bottom: 18px; }
        .banner-right .grid-box { display: flex; flex-wrap: wrap; gap: 12px; list-style: none; }
        .banner-right .grid-box .column { flex: 1 1 calc(50% - 6px); min-width: 140px; }
        .banner-right .grid-box .wid-100 { flex: 1 1 100%; }
        .banner-right .grid-box label { display: block; font-weight: 600; margin-bottom: 4px; font-size: var(--font-sm); color: #1a1a1a; }
        .banner-right .grid-box label span { color: #1a1a1a; }
        .banner-right .grid-box input,
        .banner-right .grid-box textarea {
            width: 100%; padding: 10px 14px; border: 2px solid #d5d8dd; border-radius: var(--radius-sm);
            font-size: var(--font-sm); color: #1a1a1a; background: #fafbfc; transition: border 0.2s; font-family: inherit;
        }
        .banner-right .grid-box input:focus,
        .banner-right .grid-box textarea:focus { border-color: var(--accent); outline: none; background: #fff; }
        .banner-right .grid-box textarea { min-height: 80px; resize: vertical; }
        .banner-right .grid-box .wukaka,
        .banner-right .grid-box input[type="submit"] {
            background: var(--accent); color: #fff; border: none; padding: 14px 30px; border-radius: 30px;
            font-weight: 700; font-size: var(--font-md); cursor: pointer; width: 100%; letter-spacing: 0.5px; transition: all 0.25s;
        }
        .banner-right .grid-box .wukaka:hover,
        .banner-right .grid-box input[type="submit"]:hover { background: var(--accent-hover); box-shadow: 0 6px 18px rgba(232,148,58,0.4); }
        .banner-right .txt-center { text-align: center; }

        @media (max-width: 768px) {
            .banner-wrap {
                min-height: auto;           /* 高度由内容决定，避免黑边 */
                padding: 40px 0;
            }
            .banner-right { display: none; }
            .banner-left h1 { font-size: 32px; }
            .banner-left .sub-tagline { font-size: 18px; }
            .banner-left .bullets { font-size: 16px; }
            .banner-left .btn-cta-lg { font-size: 18px; padding: 14px 30px; }
            .banner-inner { padding: 30px 18px; }
        }

        /* ========== SECTION COMMON ========== */
        .section { padding: 60px 20px; }
        .section-title {
            text-align: center; font-size: var(--font-3xl); font-weight: 800; color: var(--text-heading);
            margin-bottom: 10px; letter-spacing: -0.3px;
        }
        .section-subtitle {
            text-align: center; font-size: var(--font-md); color: #444; margin-bottom: 40px;
            max-width: 700px; margin-left: auto; margin-right: auto;
        }
        .container { max-width: var(--max-width); margin: 0 auto; }
/* ========== PRODUCT OVERVIEW ========== */
        .prod-overview { display: flex; align-items: center; gap: 50px; flex-wrap: wrap; background: var(--bg-light); border-radius: 16px; padding: 50px 40px; margin-bottom: 20px; }
        .prod-overview .ov-left { flex: 1 1 420px; min-width: 280px; border-radius: 12px; overflow: hidden; }
        .prod-overview .ov-left img { width: 100%; height: 100%; object-fit: cover; border-radius: 12px; }
        .prod-overview .ov-right { flex: 1 1 400px; min-width: 280px; }
        .prod-overview .ov-right h3 { font-size: var(--font-2xl); color: var(--text-heading); margin-bottom: 14px; font-weight: 700; }
        .prod-overview .ov-right p { font-size: var(--font-md); color: #2a2a2a; margin-bottom: 12px; line-height: 1.7; }
        .prod-overview .ov-right .feature-list { list-style: none; font-size: var(--font-md); color: #1a1a1a; }
        .prod-overview .ov-right .feature-list li { padding: 7px 0 7px 28px; position: relative; font-weight: 500; }
        .prod-overview .ov-right .feature-list li::before { content: '\25CF'; position: absolute; left: 0; color: var(--accent); font-size: 14px; top: 9px; }

        /* ========== 锚点导航 ========== */
        .anchor-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin: 10px 0 40px;
}
.anchor-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #e8943a;
    color: #fff;
    padding: 14px 30px;
    border-radius: 40px;
    font-weight: 700;
    font-size: 18px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: 0 6px 18px rgba(0,0,0,0.15);
    letter-spacing: 0.3px;
}
.anchor-nav a i {
    font-size: 20px;
}
.anchor-nav a:hover {
    background: var(--accent, #e8943a);
    border-color: var(--accent-hover, #d17a28);
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(232,148,58,0.4);
}
@media (max-width: 768px) {
    .anchor-nav {
        gap: 12px;
    }
    .anchor-nav a {
        padding: 12px 22px;
        font-size: 16px;
        width: calc(50% - 12px);
        justify-content: center;
    }
}
@media (max-width: 480px) {
    .anchor-nav a {
        width: 100%;
        padding: 14px 20px;
        font-size: 16px;
    }
}

        /* ========== PRODUCT CARDS GRID ========== */
        .prod-category { margin-bottom: 40px; }
        .prod-category h3 {
            font-size: var(--font-2xl); color: var(--text-heading); margin-bottom: 8px; font-weight: 700;
            padding-left: 6px; border-left: 5px solid var(--accent);
        }
        .prod-category .cat-desc { font-size: var(--font-sm); color: #444; margin-bottom: 20px; padding-left: 14px; }
        .prod-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 22px; }
        .prod-card {
            background: #fff; border: 2px solid #e8eaef; border-radius: 10px; overflow: hidden;
            transition: all 0.3s; box-shadow: 0 2px 8px rgba(0,0,0,0.04); text-align: center;
        }
        .prod-card:hover { border-color: var(--accent); box-shadow: 0 8px 28px rgba(0,0,0,0.1); transform: translateY(-4px); }
        .prod-card .card-img { height: 200px; display: flex; align-items: center; justify-content: center; background: #eef1f5; overflow: hidden; }
        .prod-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .prod-card .card-info { padding: 16px 14px; }
        .prod-card .card-info h4 { font-size: var(--font-md); color: #1a1a1a; margin-bottom: 6px; font-weight: 700; }
        .prod-card .card-info p { font-size: var(--font-sm); color: #333; margin-bottom: 10px; }
        .prod-card .btn-inquiry-xs { display: inline-block; background: var(--accent); color: #fff; padding: 8px 20px; border-radius: 22px; font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; border: none; transition: all 0.2s; }
        .prod-card .btn-inquiry-xs:hover { background: var(--accent-hover); }

        @media (max-width: 768px) {
            .prod-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .prod-card .card-img { height: 150px; }
            .prod-card .card-info h4 { font-size: 16px; }
            .prod-overview { padding: 28px 16px; gap: 24px; }
            .prod-overview .ov-left { min-height: 220px; }
            .section { padding: 36px 14px; }
            .section-title { font-size: 28px; }
        }
        @media (max-width: 480px) {
            .prod-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
            .prod-card .card-img { height: 130px; }
        }

        /* ========== STRENGTHS ========== */
        .strength-section { background: var(--bg-light); }
        .strength-about { display: flex; gap: 40px; flex-wrap: wrap; align-items: flex-start; margin-bottom: 40px; }
        .strength-about .sa-text { flex: 1 1 400px; min-width: 280px; }
        .strength-about .sa-text h3 { font-size: var(--font-2xl); color: var(--text-heading); margin-bottom: 14px; font-weight: 700; }
        .strength-about .sa-text p { font-size: var(--font-md); color: #2a2a2a; line-height: 1.7; margin-bottom: 10px; }
        .sa-highlights { display: flex; flex-wrap: wrap; gap: 18px; flex: 1 1 300px; min-width: 260px; }
        .highlight-box {
            background: #fff; border-radius: 10px; padding: 20px 18px; text-align: center;
            flex: 1 1 calc(50% - 9px); min-width: 130px; box-shadow: var(--shadow); border: 1px solid #e8eaef;
        }
        .highlight-box .hl-num { font-size: 36px; font-weight: 800; color: var(--accent); display: block; line-height: 1; margin-bottom: 6px; }
        .highlight-box .hl-label { font-size: var(--font-sm); color: #1a1a1a; font-weight: 600; }

        .factory-gallery {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 30px;
        }
        .factory-gallery img {
            width: 100%; height: 200px; object-fit: cover; border-radius: 8px;
            transition: transform 0.3s; border: 2px solid #e8eaef;
        }
        .factory-gallery img:hover { transform: scale(1.03); border-color: var(--accent); }
        @media (max-width: 768px) {
            .factory-gallery { grid-template-columns: repeat(2, 1fr); gap: 10px; }
            .factory-gallery img { height: 150px; }
        }
        @media (max-width: 480px) {
            .factory-gallery { grid-template-columns: repeat(2, 1fr); }
            .factory-gallery img { height: 120px; }
        }

        .certificates-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 1000px; margin: 0 auto; }
        .cert-card {
    background: #fff;
    border: 2px solid #e8eaef;
    border-radius: 10px;
    padding: 30px 20px;     /* 增大内边距 */
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}
        .cert-card img {
    width: 100%;
    max-width: 100%;
    height: auto;        
    max-height: 350px;   
    object-fit: contain;
    display: block;
}
.cert-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}
     @media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: 1fr;     /* 手机端单列 */
        gap: 16px;
        max-width: 100%;
    }
    .cert-card img {
        max-height: 280px;
    }
}
@media (max-width: 480px) {
    .cert-card img {
        max-height: 240px;
    }
}

        /* ========== HOW WE WORK ========== */
        .steps-row { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
        .step-item {
            flex: 1 1 180px; min-width: 150px; text-align: center; padding: 20px 14px;
            background: #fff; border-radius: 10px; box-shadow: var(--shadow); border: 1px solid #e8eaef;
        }
        .step-item .step-num {
            display: inline-block; width: 50px; height: 50px; line-height: 50px; border-radius: 50%;
            background: var(--accent); color: #fff; font-weight: 800; font-size: 22px; margin-bottom: 10px;
        }
        .step-item h4 { font-size: var(--font-md); color: #1a1a1a; font-weight: 700; margin-bottom: 4px; }
        .step-item p { font-size: var(--font-sm); color: #333; }

        /* ========== FOOTER ========== */
        .footer-section { background: var(--pri); color: #fff; padding: 50px 20px 30px; }
        .footer-inner { max-width: var(--max-width); margin: 0 auto; display: flex; gap: 40px; flex-wrap: wrap; }
        .footer-faq { flex: 1 1 400px; min-width: 280px; }
        .footer-faq h3 { font-size: var(--font-xl); margin-bottom: 18px; font-weight: 700; color: #fff; }
        .footer-faq .faq-item { margin-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,0.2); padding-bottom: 14px; }
        .footer-faq .faq-q { font-weight: 700; font-size: var(--font-md); color: #fff; margin-bottom: 4px; }
        .footer-faq .faq-a { font-size: var(--font-sm); color: #d5d5d5; line-height: 1.6; }
        .footer-form-wrap {
            flex: 0 0 440px; min-width: 300px; background: #fff; border-radius: 12px;
            padding: 28px 24px; color: #1a1a1a;
        }
        .footer-form-wrap h3 { font-size: var(--font-xl); color: var(--text-heading); margin-bottom: 4px; font-weight: 700; }
        .footer-form-wrap .form-sub { font-size: var(--font-sm); color: #555; margin-bottom: 16px; }
        .footer-form-wrap .grid-box { display: flex; flex-wrap: wrap; gap: 12px; list-style: none; }
        .footer-form-wrap .grid-box .column { flex: 1 1 calc(50% - 6px); min-width: 130px; }
        .footer-form-wrap .grid-box .wid-100 { flex: 1 1 100%; }
        .footer-form-wrap .grid-box label { display: block; font-weight: 600; margin-bottom: 4px; font-size: var(--font-sm); color: #1a1a1a; }
        .footer-form-wrap .grid-box input,
        .footer-form-wrap .grid-box textarea {
            width: 100%; padding: 10px 14px; border: 2px solid #d5d8dd; border-radius: var(--radius-sm);
            font-size: var(--font-sm); color: #1a1a1a; background: #fafbfc; font-family: inherit; transition: border 0.2s;
        }
        .footer-form-wrap .grid-box input:focus,
        .footer-form-wrap .grid-box textarea:focus { border-color: var(--accent); outline: none; background: #fff; }
        .footer-form-wrap .grid-box textarea { min-height: 80px; resize: vertical; }
        .footer-form-wrap .grid-box .wukaka,
        .footer-form-wrap .grid-box input[type="submit"] {
            background: var(--accent); color: #fff; border: none; padding: 14px 30px; border-radius: 30px;
            font-weight: 700; font-size: var(--font-md); cursor: pointer; width: 100%; letter-spacing: 0.5px; transition: all 0.25s;
        }
        .footer-form-wrap .grid-box .wukaka:hover,
        .footer-form-wrap .grid-box input[type="submit"]:hover { background: var(--accent-hover); box-shadow: 0 6px 18px rgba(232,148,58,0.4); }
        .footer-bottom {
            text-align: center; padding-top: 20px; margin-top: 20px; border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 15px; color: #bbb; max-width: var(--max-width); margin-left: auto; margin-right: auto;
        }
        @media (max-width: 768px) {
            .footer-inner { flex-direction: column; gap: 28px; }
            .footer-form-wrap { flex: 1 1 auto; width: 100%; }
        }

        /* 弹出表单容器（保留用户原有样式） */
        #pups_from { /* 样式由用户管理 */ }
        a, button { cursor: pointer; }
        img { max-width: 100%; height: auto; }
        input::placeholder, textarea::placeholder { color: #888; font-size: 15px; }

     #Pop_UpsBtn {
    background: url(/jiale-ventilation/2026/05/19/youxaing1.png) no-repeat center #e8943a !important;
    right: 20px !important;
    bottom: 135px !important;
    z-index: 11111 !important;
}
.Stick {
    position: fixed;
    right: 20px;
    bottom: 55px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    background: #e8943a;
    cursor: pointer;
    z-index: 11111 !important;
}
.factorytu, .certificates {
  font-size: 30px;
  color: #0b1e33;
  font-weight: 700;
  margin-bottom: 14px;
}
#pups_from form ul li input[type="submit"] {
  background: #e8943a;
}