.about-koivi {
    width: 100%;
    overflow-x: hidden;
    background: #ffffff;
}
.container {
    max-width: 1200px;
}
.about {
    padding: 80px 20px;
}
.row {
    display: grid;
    gap: 30px;
    margin-bottom: 90px;
}
.row-two {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}
.row-three {
    grid-template-columns: repeat(3, 1fr);
}
.row-four {
    grid-template-columns: repeat(4, 1fr);
}
.row-factory-top {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}
.row-two-sm {
    grid-template-columns: 1fr 1fr;
    gap:15px;
}
.section-head {
    text-align: center;
    margin-bottom: 50px;
}
.section-subtitle {
    display: inline-block;
    font-size: 14px;
    color: #007bbd;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
    font-weight: 500;
}
.section-title {
    font-size: 32px;
    color: #111;
    font-weight: 700;
    margin-bottom:15px;
}
.section-title.white {
    color:#ffffff;
}
.section-desc {
    max-width:700px;
    margin:0 auto;
    color:#666;
    line-height:1.8;
}
.section-head p {
    color:#555;
    line-height:1.9;
}
.about-brand p {
    font-size:16px;
    color:#555;
    margin-bottom:20px;
    line-height:1.9;
}
.placeholder-box {
    background:#f6f8fa;
    border-radius:12px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#999;
    font-size:15px;
    min-height:420px;
}
.img-box { 
    width: 100%;
    border-radius: 20px;
}
.placeholder-box.small {
    min-height:180px;
}
.placeholder-box.map {
    min-height:380px;
    background:#eef3f8;
    color:#007bbd;
}
.about-stats {
    margin-bottom:90px;
}
.stat-item {
    background:#f8fafb;
    text-align:center;
    padding:30px 20px;
    border-radius:10px;
}
.stat-item h3 {
    font-size:32px;
    color:#007bbd;
    margin-bottom:8px;
    font-weight:700;
}
.stat-item p {
    font-size:15px;
    color:#555;
}
.about-factory {
    margin-bottom:100px;
}
.factory-text {
    text-align:center;
    font-size:16px;
    color:#555;
    line-height:1.9;
    margin-top:30px;
}
.product-card {
    border:1px solid #eee;
    border-radius:12px;
    overflow:hidden;
    background:#fff;
}
.product-card .placeholder-box {
    min-height:210px;
}
.card-body {
    padding:22px;
}
.card-body h4 {
    font-size:18px;
    color:#222;
    margin-bottom:10px;
}
.card-body p {
    font-size:15px;
    color:#555;
    line-height:1.7;
}
.adv-item {
    background:#f8fafb;
    padding:30px;
    border-radius:12px;
    border-top:3px solid #007bbd;
}
.adv-item h4 {
    font-size:18px;
    color:#222;
    margin-bottom:15px;
    font-weight:600;
}
.adv-item p {
    font-size:15px;
    color:#555;
    line-height:1.8;
}
.cert-item {
    background:#f8fafb;
    padding:30px 15px;
    border-radius:12px;
    text-align:center;
}
.cert-item h4 {
    color:#007bbd;
    font-size:17px;
    margin-bottom:10px;
}
.cert-item p {
    font-size:14px;
    color:#555;
}
.global-wrap {
    background:#f8fafb;
    padding:50px;
    border-radius:12px;
    margin-bottom:90px;
}
.global-list {
    list-style:none;
    margin-top:10px;
}
.global-list li {
    padding:8px 0;
    font-size:15px;
    color:#555;
}
.video-wrap {
    max-width: 100%;
    margin: 0 auto 90px;
}
.video-player video {
    width: 100%;
    border-radius: 12px;
    background: #000;
}
.video-info {
    text-align: center;
    padding-top: 25px;
}
.video-info h4 {
    font-size: 18px;
    color: #222;
    margin-bottom: 8px;
}
.video-info p {
    font-size: 15px;
    color: #555;
}
/* Application Fields */
/* Application Fields 正方形图片卡片 */
.about-application {
    margin-bottom: 90px;
}

.application-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-bottom: 30px;
}

.application-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 1 / 1; /* 正方形 */
}

.application-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.application-item:hover .application-image img {
    transform: scale(1.05);
}

.application-label {
    position: absolute;
    bottom: 18px;
    left: 18px;
    background: rgba(0, 123, 189, 0.9);
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
}

.application-text {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    font-size: 16px;
    color: #555;
    line-height: 1.9;
}

.cooperation-block {
    background:#f8fafb;
    padding:60px;
    border-radius:12px;
    margin-bottom:90px;
}
.cooperation-block h3 {
    font-size:26px;
    color:#111;
    margin-bottom:20px;
}
.cooperation-block p {
    font-size:16px;
    color:#555;
    line-height:1.9;
    margin-bottom:20px;
}
.cta-block {
    background:#0d1f33;
    border-radius:16px;
    padding:60px;
    position:relative;
    overflow:hidden;
    margin-bottom:90px;
}
.cta-bg {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-image: radial-gradient(circle at 10% 20%, rgba(0,123,189,0.12) 0%, transparent 20%),radial-gradient(circle at 90% 80%, rgba(0,168,232,0.12) 0%, transparent 20%);
}
.cta-inner {
    position:relative;
    z-index:2;
    align-items:stretch;
}
.cta-left p {
    color:rgba(255,255,255,0.85);
    font-size:16px;
    line-height:1.8;
    margin-bottom:25px;
}
.cta-feature {
    background:rgba(255,255,255,0.06);
    border-radius:10px;
    padding:18px;
}
.cta-feature h4 {
    color:#00a8e8;
    font-size:15px;
    margin-bottom:8px;
}
.cta-feature p {
    color:rgba(255,255,255,0.75);
    font-size:14px;
    margin:0;
}
.btn-primary {
    display:inline-block;
    padding:14px 30px;
    background:#007bbd;
    color:#fff;
    border-radius:8px;
    text-decoration:none;
    font-weight:600;
    font-size:15px;
    border:none;
    cursor:pointer;
}
.cta-right {
    background:rgba(255,255,255,0.04);
    border:1px solid rgba(255,255,255,0.08);
    border-radius:12px;
    padding:30px;
}
.cta-right h4 {
    color:#fff;
    font-size:18px;
    margin-bottom:20px;
}
.inquiry-form {
    display:flex;
    flex-direction:column;
    gap:15px;
}
.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
    width:100%;
    padding:12px 15px;
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.08);
    border-radius:8px;
    color:#fff;
    font-size:15px;
    outline:none;
}
.inquiry-form textarea {
    resize:none;
}
.inquiry-form option {
    color:#222;
}

/* 响应式 */
@media(max-width:1199px){
    .row-factory-top {
        grid-template-columns:1fr 1fr;
    }
}
@media(max-width:991px){
    .row-two {
        grid-template-columns:1fr;
    }
    .row-three {
        grid-template-columns:repeat(2,1fr);
    }
    .row-four {
        grid-template-columns:repeat(2,1fr);
    }
    .row-factory-top {
        grid-template-columns:1fr;
    }
    .video-player {
        min-height:340px;
    }
}
@media(max-width:767px){
    .row-two,
    .row-three,
    .row-four,
    .row-factory-top,
    .row-two-sm {
        grid-template-columns:1fr;
    }
    .video-player {
        min-height:240px;
    }
    .section-title {
        font-size:24px;
    }
    .about {
        padding:40px 15px;
    }
    .global-wrap,
    .cooperation-block,
    .cta-block {
        padding:30px 20px;
    }
    .application-grid {
        grid-template-columns: 1fr;
    }
}