/* ==========================================================================
   应用场景页（版式参照通锐 trvip.cn 应用领域）
   1) 行业应用：4 张图片卡
   2) 典型应用场景：按产品分类筛选的文字卡
   3) 询价 CTA
   ========================================================================== */

/* ---------------------------- 1. 行业应用 ---------------------------- */
.tr-appi {
    padding: 76px 0 66px;
    background: #fff;
}

.tr-appi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.tr-appi-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid #eef1f5;
    overflow: hidden;
    transition: all .35s ease;
}

.tr-appi-card:hover {
    border-color: transparent;
    box-shadow: 0 16px 34px rgba(6, 26, 43, .14);
    transform: translateY(-4px);
}

.tr-appi-cardpic {
    display: block;
    position: relative;
    padding-top: 62%;
    overflow: hidden;
    background: #eef1f5;
}

.tr-appi-cardpic img {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}

.tr-appi-card:hover .tr-appi-cardpic img {
    transform: scale(1.06);
}

.tr-appi-cardbody {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    padding: 20px 20px 22px;
}

.tr-appi-en {
    display: block;
    font-style: normal;
    font-size: 11px;
    letter-spacing: 2px;
    color: #9aa4b1;
    text-transform: uppercase;
}

.tr-appi-name {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-top: 8px;
    font-size: 19px;
    font-weight: 700;
    color: #222;
    transition: color .3s ease;
}

.tr-appi-name i {
    color: var(--tr-main);
}

.tr-appi-card:hover .tr-appi-name {
    color: var(--tr-main);
}

.tr-appi-sub {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: #4d5b6b;
}

.tr-appi-desc {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
    margin: 12px 0;
    font-size: 13px;
    line-height: 1.8;
    color: #8a949f;
}

.tr-appi-parts-line {
    display: block;
    margin-top: auto;
    padding-top: 12px;
    font-size: 12px;
    line-height: 1.7;
    color: #9aa4b1;
    border-top: 1px dashed #e8edf3;
}

.tr-appi-parts-line i {
    margin-right: 4px;
    color: var(--tr-main);
}

/* ------------------------- 2. 典型应用场景 ------------------------- */
.tr-appi-scenes-sec {
    padding: 72px 0 76px;
    background: #f6f8fb;
}

.tr-appi-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin: 0 0 34px;
    padding: 0;
    list-style: none;
}

.tr-appi-tabs li {
    padding: 9px 22px;
    font-size: 14px;
    color: #4d5b6b;
    background: #fff;
    border: 1px solid #e3e9f0;
    border-radius: 999px;
    cursor: pointer;
    transition: all .3s ease;
}

.tr-appi-tabs li:hover,
.tr-appi-tabs li.active {
    color: #fff;
    background: var(--tr-main);
    border-color: var(--tr-main);
    box-shadow: 0 10px 22px rgba(0, 102, 204, .22);
}

.tr-appi-scenes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 18px;
}

.tr-scene {
    position: relative;
    padding: 22px 20px 20px;
    background: #fff;
    border: 1px solid #eef1f5;
    transition: all .35s ease;
}

.tr-scene:hover {
    border-color: transparent;
    box-shadow: 0 14px 30px rgba(6, 26, 43, .1);
    transform: translateY(-3px);
}

.tr-scene-ico {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-bottom: 14px;
    font-size: 17px;
    color: var(--tr-main);
    background: rgba(0, 102, 204, .08);
    border-radius: 10px;
}

.tr-scene-name {
    display: block;
    padding-right: 76px;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    color: #222;
}

.tr-scene-tag {
    position: absolute;
    right: 20px;
    top: 26px;
    padding: 3px 9px;
    font-size: 12px;
    color: #5b7ea0;
    background: #f0f5fa;
    border-radius: 3px;
}

.tr-scene-desc {
    margin: 10px 0 0;
    font-size: 13px;
    line-height: 1.8;
    color: #7d8794;
}

.tr-scene-parts {
    margin: 12px 0 0;
    padding-top: 12px;
    font-size: 12px;
    line-height: 1.7;
    color: #9aa4b1;
    border-top: 1px dashed #e8edf3;
}

.tr-scene-parts i {
    margin-right: 4px;
    color: var(--tr-main);
}

/* ---------------------------- 3. 询价 CTA ---------------------------- */
.tr-appi-cta {
    padding: 62px 0 72px;
    background: #fff;
}

.tr-appi-cta-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 26px;
    padding: 30px 34px;
    background: #f7f9fc;
    border: 1px solid #eef1f5;
    border-left: 4px solid var(--tr-main);
}

.tr-appi-cta-txt b {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: #222;
}

.tr-appi-cta-txt p {
    margin: 8px 0 0;
    font-size: 14px;
    line-height: 1.8;
    color: #66727f;
}

.tr-appi-cta-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tr-appi-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    color: #333;
    background: #fff;
    border: 1px solid #d8e0ea;
    text-decoration: none;
    white-space: nowrap;
    transition: all .3s ease;
}

.tr-appi-btn:hover {
    color: var(--tr-main);
    border-color: var(--tr-main);
}

.tr-appi-btn--main {
    color: #fff;
    background: var(--tr-main);
    border-color: var(--tr-main);
}

.tr-appi-btn--main:hover {
    color: #fff;
    background: #0a4f96;
    border-color: #0a4f96;
}

/* ---------------------------- 响应式 ---------------------------- */
@media screen and (max-width: 1199px) {
    .tr-appi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .tr-appi {
        padding: 42px 0 36px;
    }

    .tr-appi-grid {
        gap: 14px;
    }

    .tr-appi-cardbody {
        padding: 14px 14px 16px;
    }

    .tr-appi-name {
        font-size: 16px;
    }

    .tr-appi-scenes-sec {
        padding: 42px 0 46px;
    }

    .tr-appi-tabs {
        gap: 8px;
        margin-bottom: 24px;
    }

    .tr-appi-tabs li {
        padding: 8px 16px;
        font-size: 13px;
    }

    .tr-appi-scenes {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .tr-appi-cta {
        padding: 36px 0 42px;
    }

    .tr-appi-cta-inner {
        padding: 22px 20px;
    }

    .tr-appi-cta-txt b {
        font-size: 17px;
    }
}

/* 窄屏单列：中文行业名较长，两列会挤到出界 */
@media screen and (max-width: 560px) {
    .tr-appi-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .tr-appi-name {
        font-size: 17px;
    }

    .tr-appi-en {
        letter-spacing: 1px;
    }
}