/* ========== 基础 + Banner ========== */
* { box-sizing: border-box; }

.zdb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.zdb-title-bar {
    display: inline-block;
    width: 4px;
    height: 28px;
    background-color: #d61c2a;
    margin-right: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* Banner — 整图 */
.top-banner {
    width: 100%;
    height: 500px;
    overflow: hidden;
    position: relative;
}
.top-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}
@media (max-width: 768px) { .top-banner { height: 280px; } }
@media (max-width: 480px) { .top-banner { height: 200px; } }

/* ========== 优势图标栏 ========== */
.zdb-feat-row {
    width: 100%;
    padding: 28px 0;
    background-color: #f8fbff;
    border-bottom: 1px solid #f0f0f0;
}
.zdb-feat-row-inner {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 0;
    position: relative;
}
.zdb-feat-item {
    flex: 1 1 25%;
    max-width: 25%;
    display: flex;
    flex-direction: row;          /* ← 图标左、文字右 */
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 16px 20px;
    position: relative;
    transition: transform 0.3s;
}
/* 除最后一个外，每个 item 右侧加竖线分隔 */
.zdb-feat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 50%;
    background-color: #e5e8ed;
}
.zdb-feat-item:hover { transform: translateY(-2px); }
.zdb-feat-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.zdb-feat-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
/* 右侧文字容器：主标题上 + 副描述下 */
.zdb-feat-text {
    display: flex;
    flex-direction: column;      /* ← 主标题上、副描述下 */
    gap: 4px;
    min-width: 0;
}
.zdb-feat-label {
    font-size: 16px;
    color: #1a1a1a;
    font-weight: 600;
    line-height: 1.3;
}
.zdb-feat-desc {
    font-size: 12px;
    color: #888888;
    line-height: 1.5;
    margin: 0;
}

@media (max-width: 992px) {
    .zdb-feat-item { padding: 10px 16px; gap: 10px; }
    .zdb-feat-icon { width: 44px; height: 44px; }
    .zdb-feat-label { font-size: 14px; }
    .zdb-feat-desc { font-size: 11px; }
}
@media (max-width: 768px) {
    .zdb-feat-row { padding: 22px 0; }
    .zdb-feat-row-inner { flex-wrap: wrap; }
    .zdb-feat-item { flex: 1 1 50%; max-width: 50%; padding: 10px 14px; }
    .zdb-feat-item:nth-child(2)::after { display: none; }
    .zdb-feat-item:nth-child(-n+2) { border-bottom: 1px solid #e5e8ed; }
}
@media (max-width: 480px) {
    .zdb-feat-item { flex: 1 1 50%; padding: 8px 10px; gap: 8px; }
    .zdb-feat-icon { width: 36px; height: 36px; }
    .zdb-feat-label { font-size: 13px; }
    .zdb-feat-desc { font-size: 10px; line-height: 1.3; }
}

/* ========== 通用标题 ========== */
.zdb-sec {
    width: 100%;
    padding: 50px 0;
    background-color: #ffffff;
}
.zdb-sec-title {
    font-size: 28px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0 0 10px 0;
    line-height: 1;
    display: flex;
    align-items: center;
}
.zdb-sec-sub {
    font-size: 14px;
    color: #888;
    margin: 0 0 35px 0;
    padding-left: 16px;
}
.zdb-sec-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 35px;
}
.zdb-sec-more {
    font-size: 14px;
    color: #d61c2a;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    padding-top: 8px;
    white-space: nowrap;
}
.zdb-sec-more::after {
    content: '→';
    font-size: 16px;
    transition: transform 0.3s;
}
.zdb-sec-more:hover::after { transform: translateX(3px); }

/* ========== 型号选择 ========== */
.zdb-model {
    background-color: #ffffff;
    padding: 50px 0;
}
.zdb-model-header {
    margin-bottom: 28px;
}
.zdb-model-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.zdb-model-title-wrap h2 {
    font-size: 28px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1;
    display: flex;
    align-items: center;
}
.zdb-model-sub {
    font-size: 14px;
    color: #888;
    margin: 0;
    padding-left: 16px;
    line-height: 1.6;
}
.zdb-model-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}
.zdb-model-item {
    background: #ffffff;
    border: 1px solid #e5e8ed;
    border-radius: 4px;
    padding: 28px 16px;
    text-align: center;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    transition: all 0.3s;
    min-height: 130px;
}
.zdb-model-item:hover {
    border-color: #d61c2a;
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}
.zdb-model-num {
    font-size: 42px;
    font-weight: bold;
    color: #2b6cb0;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1;
}
.zdb-model-btn {
    display: inline-block;
    padding: 5px 18px;
    font-size: 12px;
    color: #ffffff;
    background-color: #2b6cb0;
    border-radius: 2px;
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 1px;
    transition: background 0.3s;
}
.zdb-model-btn:hover { background-color: #1e5799; }

/* 最后一张：深蓝大卡，跨 2 列 */
.zdb-model-more-card {
    grid-column: span 2;
    background-color: #0067ac;
    border-color: #0067ac;
    padding: 28px 24px;
    gap: 18px;
    justify-content: center;
}
.zdb-model-more-card:hover {
    background-color: #3062a0;
    border-color: #3062a0;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(30,58,95,0.3);
}
.zdb-model-more-text {
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
    text-align: center;
    line-height: 1.5;
}
.zdb-model-btn--white {
    background-color: #ffffff;
    color: #1e3a5f;
    border: 1px solid #ffffff;
}
.zdb-model-btn--white:hover { background-color: #f0f4f8; }

@media (max-width: 992px) {
    .zdb-model { padding: 40px 0; }
    .zdb-model-grid { grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .zdb-model-num { font-size: 32px; }
    .zdb-model-item { padding: 22px 10px; min-height: 110px; gap: 14px; }
    .zdb-model-more-card { grid-column: span 2; }
}
@media (max-width: 768px) {
    .zdb-model-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .zdb-model-num { font-size: 28px; }
    .zdb-model-item { padding: 20px 8px; min-height: 100px; gap: 12px; }
    .zdb-model-more-card { grid-column: span 2; }
    .zdb-model-more-text { font-size: 15px; }
}
@media (max-width: 480px) {
    .zdb-model-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .zdb-model-num { font-size: 26px; }
    .zdb-model-item { padding: 20px 6px; min-height: 96px; gap: 10px; }
    .zdb-model-more-card { grid-column: span 2; }
    .zdb-model-more-text { font-size: 14px; }
}

/* ========== 产品中心 ========== */
.zdb-pd { padding: 50px 0; }

/* 标题区：左侧超大标题 + 右侧英文/中文两行 */
.zdb-pd-header {
    display: flex;
    align-items: flex-start;
    gap: 22px;
    margin-bottom: 24px;
}
.zdb-pd-title {
    font-size: 40px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.1;
    flex-shrink: 0;
}
.zdb-pd-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 6px;
}
.zdb-pd-en {
    font-size: 14px;
    color: #555555;
    letter-spacing: 1.5px;
    margin: 0;
    line-height: 1.2;
}
.zdb-pd-sub {
    font-size: 14px;
    color: #888888;
    margin: 0;
    line-height: 1.4;
}

/* 三列卡片 */
.zdb-pd-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}
.zdb-pd-card {
    position: relative;
    display: block;
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 4px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
    aspect-ratio: 327 / 292;
}
.zdb-pd-card:hover {
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

/* 产品图：整张铺满卡片作为背景 */
.zdb-pd-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}
.zdb-pd-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.5s;
}
.zdb-pd-card:hover .zdb-pd-img img { transform: scale(1.05); }

/* 文字层：左上标题 + 列表 + 左下按钮 */
.zdb-pd-overlay {
    position: absolute;
    inset: 0;
    padding: 20px 0 18px 20px;
    display: flex;
    flex-direction: column;
    z-index: 1;
    pointer-events: none;
}
.zdb-pd-name {
    font-size: 20px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.3;
}
/* 标题下深蓝色短横线 */
.zdb-pd-name::after {
    content: '';
    display: block;
    width: 100px;
    height: 2px;
    background-color: #1e3a5f;
    margin-top: 12px;
}
.zdb-pd-list {
    list-style: none;
    padding: 0;
    margin: 22px 0 0 0;
    display: flex;
    flex-direction: column;
}
.zdb-pd-list li {
    font-size: 13px;
    color: #999999;
    line-height: 2.15;
}
.zdb-pd-btn {
    display: inline-block;
    align-self: flex-start;
    margin-top: auto;
    padding: 7px 20px;
    font-size: 13px;
    font-weight: 500;
    color: #ffffff;
    background-color: #2b7fd8;
    border-radius: 2px;
    text-decoration: none;
    letter-spacing: 1px;
    pointer-events: auto;
    transition: background 0.3s;
}
.zdb-pd-btn:hover { background-color: #1e6fc4; }

@media (max-width: 992px) {
    .zdb-pd-title { font-size: 32px; }
    .zdb-pd-grid { gap: 18px; }
    .zdb-pd-name { font-size: 18px; }
    .zdb-pd-list li { font-size: 13px; }
}
@media (max-width: 768px) {
    .zdb-pd-header {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 20px;
    }
    .zdb-pd-title { font-size: 26px; }
    .zdb-pd-title-wrap { padding-top: 0; }
    .zdb-pd-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .zdb-pd-name { font-size: 16px; }
}
@media (max-width: 480px) {
    .zdb-pd-grid { grid-template-columns: 1fr; gap: 16px; }
    .zdb-pd-card { aspect-ratio: 4 / 3; }
    .zdb-pd-name { font-size: 18px; }
    .zdb-pd-btn { padding: 6px 16px; font-size: 12px; }
}

/* ========== 产品特点 ========== */
.zdb-ft-bg { background-color: #ffffff; }

/* 标题区：左侧大标题 + 右侧英文/中文两行（与设计图一致） */
.zdb-ft-header {
    display: flex;
    align-items: center;
    gap: 42px;
    margin-bottom: 32px;
}
.zdb-ft-title {
    font-size: 32px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.2;
    flex-shrink: 0;
}
.zdb-ft-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.zdb-ft-en {
    font-size: 13px;
    color: #999999;
    letter-spacing: 2px;
    margin: 0;
    line-height: 1.3;
}
.zdb-ft-sub {
    font-size: 14px;
    color: #888888;
    margin: 0;
    line-height: 1.4;
}
@media (max-width: 768px) {
    .zdb-ft-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 24px;
    }
    .zdb-ft-title { font-size: 24px; }
}
.zdb-ft-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

/* 卡片：上图 + 下文字（白底、细边框、圆角） */
.zdb-ft-card {
    display: block;
    background: #ffffff;
    border: 1px solid #ececec;
    border-radius: 4px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.3s;
}
.zdb-ft-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* 顶部图片：满宽、3:2 裁切 */
.zdb-ft-img {
    width: 100%;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background: #eeeeee;
}
.zdb-ft-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s;
}
.zdb-ft-card:hover .zdb-ft-img img { transform: scale(1.05); }

/* 文字区：蓝色标题 + 灰色说明 */
.zdb-ft-body {
    padding: 14px 14px 18px;
}
.zdb-ft-name {
    font-size: 15px;
    font-weight: bold;
    color: #2b7fd8;
    margin: 0 0 8px 0;
    line-height: 1.4;
}
.zdb-ft-desc {
    font-size: 13px;
    color: #777777;
    margin: 0;
    line-height: 1.75;
}

@media (max-width: 992px) {
    .zdb-ft-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .zdb-ft-body { padding: 12px 12px 16px; }
    .zdb-ft-name { font-size: 15px; }
    .zdb-ft-desc { font-size: 13px; }
}
@media (max-width: 768px) {
    .zdb-ft-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
}
@media (max-width: 480px) {
    .zdb-ft-grid { grid-template-columns: 1fr; gap: 14px; }
    .zdb-ft-body { padding: 12px 14px 16px; }
}

/* ========== 应用领域 ========== */
.zdb-app { background-color: #ffffff; }

/* 标题区：左侧大标题 + 右侧英文/中文两行 */
.zdb-app-header {
    display: flex;
    align-items: center;
    gap: 42px;
    margin-bottom: 32px;
}
.zdb-app-title {
    font-size: 32px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.2;
    flex-shrink: 0;
}
.zdb-app-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.zdb-app-en {
    font-size: 13px;
    color: #999999;
    letter-spacing: 2px;
    margin: 0;
    line-height: 1.3;
}
.zdb-app-sub {
    font-size: 14px;
    color: #888888;
    margin: 0;
    line-height: 1.4;
}

/* 6 列网格 */
.zdb-app-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}
.zdb-app-card {
    border-radius: 4px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: all 0.3s;
    background: #ffffff;
    border: 1px solid #ececec;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.zdb-app-card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}
.zdb-app-img {
    width: 100%;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background: #eeeeee;
}
.zdb-app-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s;
}
.zdb-app-card:hover .zdb-app-img img { transform: scale(1.05); }

/* 文字区：蓝色标题 + 灰色描述，均居中 */
.zdb-app-body {
    padding: 14px 10px 16px;
    text-align: center;
}
.zdb-app-name {
    font-size: 16px;
    font-weight: bold;
    color: #2b7fd8;
    margin: 0 0 6px 0;
    line-height: 1.4;
}
.zdb-app-desc {
    font-size: 13px;
    color: #777777;
    margin: 0;
    line-height: 1.5;
}

@media (max-width: 992px) {
    .zdb-app-title { font-size: 26px; }
    .zdb-app-header { gap: 28px; }
    .zdb-app-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .zdb-app-name { font-size: 15px; }
    .zdb-app-desc { font-size: 12px; }
}
@media (max-width: 768px) {
    .zdb-app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 24px;
    }
    .zdb-app-title { font-size: 24px; }
    .zdb-app-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}
@media (max-width: 480px) {
    .zdb-app-grid { grid-template-columns: 1fr; }
}

/* ========== 质量检测 ========== */
.zdb-qc { background-color: #ffffff; }

/* 标题区：左侧大标题 + 右侧英文/中文两行 */
.zdb-qc-header {
    display: flex;
    align-items: center;
    gap: 42px;
    margin-bottom: 32px;
}
.zdb-qc-title {
    font-size: 32px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.2;
    flex-shrink: 0;
}
.zdb-qc-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.zdb-qc-en {
    font-size: 13px;
    color: #999999;
    letter-spacing: 2px;
    margin: 0;
    line-height: 1.3;
}
.zdb-qc-sub {
    font-size: 14px;
    color: #888888;
    margin: 0;
    line-height: 1.4;
}

/* 三列：左大图 + 中间检测项卡片 + 右侧图片组 */
.zdb-qc-body {
    display: grid;
    grid-template-columns: 1.62fr 0.95fr 1.55fr;
    gap: 16px;
    align-items: stretch;
}
.zdb-qc-left {
    border-radius: 6px;
    overflow: hidden;
    background: #f2f2f2;
}
.zdb-qc-left img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 中间卡片 */
.zdb-qc-mid {
    background: #ffffff;
    border: 1px solid #e8edf3;
    border-radius: 8px;
    padding: 22px 20px;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.zdb-qc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.zdb-qc-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.zdb-qc-item-ico {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.zdb-qc-item-ico img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.zdb-qc-item-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}
.zdb-qc-item-text {
    font-size: 17px;
    font-weight: bold;
    color: #2b7fd8;
    line-height: 1.3;
}
.zdb-qc-item-desc {
    font-size: 13px;
    color: #888888;
    line-height: 1.4;
}

/* 右侧图片组：上方大图 + 下方三张小图 */
.zdb-qc-right {
    display: grid;
    grid-template-rows: 1.32fr 1fr;
    gap: 10px;
}
.zdb-qc-photo {
    border-radius: 6px;
    overflow: hidden;
    background: #f2f2f2;
}
.zdb-qc-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s;
}
.zdb-qc-photo:hover img { transform: scale(1.05); }
.zdb-qc-photo-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

@media (max-width: 992px) {
    .zdb-qc-title { font-size: 26px; }
    .zdb-qc-header { gap: 28px; }
    .zdb-qc-body { grid-template-columns: 1.4fr 1fr; }
    .zdb-qc-right { grid-template-rows: 1fr 1fr; grid-column: span 2; }
    .zdb-qc-item-text { font-size: 16px; }
    .zdb-qc-mid { padding: 18px 16px; }
}
@media (max-width: 768px) {
    .zdb-qc-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 24px;
    }
    .zdb-qc-title { font-size: 24px; }
    .zdb-qc-body { grid-template-columns: 1fr; gap: 14px; }
    .zdb-qc-right { grid-column: auto; }
    .zdb-qc-left img { max-height: 260px; }
}
@media (max-width: 480px) {
    .zdb-qc-item-text { font-size: 15px; }
    .zdb-qc-item-desc { font-size: 12px; }
    .zdb-qc-list { gap: 14px; }
}

/* ========== 关于博特 ========== */
.zdb-about {
    width: 100%;
    background-color: #ffffff;
    padding: 30px 0 0;   /* 白底只包裹标题区，蓝色通栏直接到底 */
}

/* 标题区（白色背景）：左侧大标题 + 右侧英文/中文两行 */
.zdb-about-header {
    display: flex;
    align-items: flex-start;
    gap: 26px;
    margin-bottom: 30px;
}
.zdb-about-title {
    font-size: 34px;
    font-weight: bold;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.1;
    flex-shrink: 0;
}
.zdb-about-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 5px;
}
.zdb-about-en {
    font-size: 13px;
    color: #666666;
    letter-spacing: 1.5px;
    margin: 0;
    line-height: 1.2;
}
.zdb-about-sub {
    font-size: 13px;
    color: #888888;
    margin: 0;
    line-height: 1.4;
}

/* 蓝色通栏区块：蓝色背景只占 div 高度的 80%，下方 20% 透出白底 */
.zdb-about-blue {
    width: 100%;
    background: linear-gradient(to bottom, #0d72c1 0%, #0d72c1 80%, transparent 80%, transparent 100%);
    padding: 46px 0 20px;
}
.zdb-about-wrap {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

/* 左侧文字列：宽度 1100px */
.zdb-about-text {
    width: 1100px;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}
.zdb-about-company {
    font-size: 28px;
    font-weight: bold;
    color: #ffffff;
    margin: 0 0 8px 0;
    line-height: 1.3;
    letter-spacing: 1px;
}
.zdb-about-slogan {
    font-size: 14px;
    color: #a9c9e6;
    margin: 0 0 18px 0;
    line-height: 1.4;
}
.zdb-about-p {
    font-size: 13px;
    color: #dbe7f2;
    margin: 0 0 10px 0;
    line-height: 2;
    text-align: justify;
}
.zdb-about-btn {
    display: inline-block;
    align-self: flex-start;
    margin-top: 0;
    padding: 5px 16px;
    font-size: 13px;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.85);
    border-radius: 3px;
    text-decoration: none;
    transition: all 0.3s ease;
}
.zdb-about-btn:hover {
    background-color: #ffffff;
    color: #0d72c1;
}
.zdb-about-btn-arrow {
    margin-left: 6px;
    display: inline-block;
    transition: transform 0.3s ease;
}
.zdb-about-btn:hover .zdb-about-btn-arrow { transform: translateX(3px); }

/* 底部行：左 按钮+Logo，右 图片；顶部对齐（按钮顶 ≈ 图片顶），图片延伸更低 */
.zdb-about-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 28px;
    position: relative;
    z-index: 1;
}
.zdb-about-side {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex-shrink: 0;
}

/* 左下 BTP logo */
.zdb-about-logo {
    margin-top: 50px;
    display: flex;
    align-items: center;
}
.zdb-about-logo img {
    height: 40px;
    width: auto;
    display: block;
}

/* 右侧图片：约占内容宽 74%，带白色描边与投影，完全位于蓝色区域内 */
.zdb-about-img {
    width: 74%;
    max-width: 890px;
    flex-shrink: 0;
    border-radius: 8px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
}
.zdb-about-img img {
    width: 100%;
    aspect-ratio: 3.8 / 1;
    object-fit: cover;
    object-position: center;
    display: block;
    border-radius: 4px;
}
@media (max-width: 992px) {
    .zdb-about { padding: 30px 0 0; }
    .zdb-about-title { font-size: 26px; }
    .zdb-about-blue { padding: 36px 0 30px; }
    .zdb-about-text { width: 100%; }
    .zdb-about-company { font-size: 22px; }
    .zdb-about-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 26px;
    }
    .zdb-about-img {
        width: 100%;
        max-width: 100%;
    }
    .zdb-about-img img { aspect-ratio: 16 / 7; }
    .zdb-about-logo { margin-top: 28px; }
}
@media (max-width: 768px) {
    .zdb-about-header {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 20px;
    }
    .zdb-about-title { font-size: 24px; }
    .zdb-about-title-wrap { padding-top: 0; }
}
@media (max-width: 480px) {
    .zdb-about { padding: 26px 0 0; }
    .zdb-about-company { font-size: 18px; }
    .zdb-about-slogan { font-size: 13px; }
    .zdb-about-p { font-size: 12px; line-height: 1.9; }
    .zdb-about-btn { padding: 5px 14px; font-size: 12px; }
    .zdb-about-logo img { height: 34px; }
}