/* 锐捷以太彩光技术专栏 — 全部样式限定在 .rj-tech-column 内 */

.rj-tech-column {
    --rj-red: #e60039;
    --rj-blue: #007bff;
    --rj-link: #0175e8;
    --rj-text: #2a2b2e;
    --rj-text-mid: #6a6b6d;
    --rj-text-weak: rgba(0, 0, 0, 0.65);
    --rj-bg: #f7f9fa;
    --rj-bg-gray: #ebeff3;
    --rj-line: #e3e5e6;
    --rj-title: #141414;
    --rj-content: 1400px;
    --rj-main: 1273px;
    /* PC 字号 token */
    --rj-fs-hero: 36px;
    --rj-fs-section: 26px;
    --rj-fs-title: 20px;
    --rj-fs-body: 16px;
    --rj-fs-desc: 16px;
    --rj-fs-small: 14px;
    box-sizing: border-box;
    color: var(--rj-text);
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: var(--rj-fs-body);
    line-height: 1.5;
    background: #fff;
    width: 100%;
    overflow-x: hidden;
    overflow-x: clip;
    /* 支持 clip 的浏览器优先，避免 sticky 失效 */
    -webkit-font-smoothing: antialiased;
}

.rj-tech-column *,
.rj-tech-column *::before,
.rj-tech-column *::after {
    box-sizing: border-box;
}

.rj-tech-column a {
    color: inherit;
    text-decoration: none;
}

.rj-tech-column img {
    display: block;
    max-width: 100%;
    border: 0;
}

.rj-tech-column button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
    appearance: none;
}

.rj-tech-column ul,
.rj-tech-column p,
.rj-tech-column h1,
.rj-tech-column h2,
.rj-tech-column h3 {
    margin: 0;
    padding: 0;
    font-weight: inherit;
}

.rj-tech-column ul {
    list-style: none;
}

.rj-tech-column .rj-mobile-only {
    display: none !important;
}


/* ========== Banner ========== */

.rj-tech-column .rj-banner {
    position: relative;
    height: 320px;
    background: #ebeff3;
    overflow: hidden;
}


/* 设计稿：底图 + 实色 #ebeff3 毛玻璃层，最终视觉接近纯色灰底 */

.rj-tech-column .rj-banner__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.rj-tech-column .rj-banner__bg img {
    position: absolute;
    left: 0;
    top: -24.33%;
    width: 100%;
    height: 180.1%;
    max-width: none;
    object-fit: cover;
}

.rj-tech-column .rj-banner__frost {
    position: absolute;
    inset: 0;
    background: #ebeff3;
    backdrop-filter: blur(24.05px);
    -webkit-backdrop-filter: blur(24.05px);
    pointer-events: none;
}


/* 1920 画布：内容区 1400 居中 = 左右各 260；内容 top 55、高 210 */

.rj-tech-column .rj-banner__inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--rj-content);
    height: 100%;
    margin: 0 auto;
    padding: 55px 0;
    display: flex;
    align-items: center;
    gap: 30px;
    box-sizing: border-box;
}


/* 280×210 含 4px 白边（已烘焙进图），外阴影与设计稿一致 */

.rj-tech-column .rj-banner__visual {
    flex-shrink: 0;
    width: 280px;
    height: 210px;
    border-radius: 8px;
    box-shadow: 0 0 16px rgba(17, 66, 133, 0.08);
    overflow: hidden;
    background: #ebeff3;
}

.rj-tech-column .rj-banner__visual img {
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
    display: block;
}

.rj-tech-column .rj-banner__content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    max-width: 1081px;
    height: 210px;
}

.rj-tech-column .rj-banner__copy {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.rj-tech-column .rj-banner__visual picture {
    display: block;
    width: 100%;
    height: 100%;
}

.rj-tech-column .rj-banner__title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--rj-text);
}

.rj-tech-column .rj-banner__desc {
    font-size: 16px;
    line-height: 1.5;
    color: rgba(0, 0, 0, 0.65);
}

.rj-tech-column .rj-banner__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: center;
}

.rj-tech-column .rj-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 46px;
    padding: 0 40px;
    border-radius: 4px;
    font-size: 16px;
    line-height: 1.5;
    transition: background 0.2s, color 0.2s, border-color 0.2s, opacity 0.2s, box-shadow 0.2s;
    white-space: nowrap;
    cursor: pointer;
}

.rj-tech-column .rj-btn--primary {
    background: var(--rj-red);
    color: #fff;
    border: 1px solid var(--rj-red);
}

.rj-tech-column .rj-btn--ghost {
    background: transparent;
    border: 1px solid var(--rj-red);
    color: var(--rj-red);
}


/* 按钮 Hover（锐捷主站组件：主按钮加深，描边按钮填红） */

@media (hover: hover) and (pointer: fine) {
    .rj-tech-column .rj-btn--primary:hover {
        background: #c40030;
        border-color: #c40030;
        opacity: 1;
    }
    .rj-tech-column .rj-btn--ghost:hover {
        background: var(--rj-red);
        color: #fff;
        opacity: 1;
    }
}


/* ========== Body + Aside ========== */

.rj-tech-column .rj-body {
    width: 100%;
    max-width: var(--rj-content);
    margin: 0 auto;
    padding: 40px 0 0;
    display: flex;
    /* 设计稿：侧栏区到主内容起点 127，侧栏宽 101 → gap 26 */
    gap: 26px;
    align-items: flex-start;
}

.rj-tech-column .rj-aside {
    flex-shrink: 0;
    width: 101px;
    position: sticky;
    /* 默认值；JS 会按 .ys_hd_pc 实际高度写入 --rj-sticky-top */
    top: var(--rj-sticky-top, 116px);
    z-index: 21;
    align-self: flex-start;
    height: fit-content;
    background: #fff;
    overflow: visible;
}

.rj-tech-column .rj-aside__list {
    border-left: 1px solid #ebeef3;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.rj-tech-column .rj-aside__item {
    position: relative;
    padding-left: 16px;
    font-size: 16px;
    line-height: 17px;
    color: var(--rj-text-weak);
    cursor: pointer;
    transition: color 0.2s;
    white-space: nowrap;
    overflow: visible;
}

.rj-tech-column .rj-aside__item.is-active {
    color: var(--rj-blue);
    font-weight: 800;
}

.rj-tech-column .rj-aside__item.is-active::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    width: 3px;
    height: 18px;
    background: var(--rj-blue);
    border-radius: 2px;
}

.rj-tech-column .rj-main {
    flex: 1;
    min-width: 0;
    max-width: var(--rj-main);
    display: flex;
    flex-direction: column;
    gap: 60px;
    padding-bottom: 60px;
}


/* ========== Section ========== */

.rj-tech-column .rj-section__head {
    display: flex;
    align-items: center;
    gap: 4px;
    /* 设计稿图标 26 + 文案 left 30 */
    padding-bottom: 20px;
    min-height: 39px;
}

.rj-tech-column .rj-section__icon {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    overflow: hidden;
}

.rj-tech-column .rj-section__icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.rj-tech-column .rj-section__title {
    font-size: 26px;
    font-weight: 600;
    line-height: 34px;
    color: var(--rj-title);
}

.rj-tech-column .rj-section__title--m {
    display: none;
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--rj-text);
    margin-bottom: 40px;
}


/* ========== Hot ========== */

.rj-tech-column .rj-hot__cards {
    display: flex;
    gap: 16px;
    height: 388px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 24px;
}

.rj-tech-column .rj-hot__card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 4px;
    padding: 20px;
    overflow: hidden;
    height: 100%;
    box-sizing: border-box;
}

.rj-tech-column .rj-hot__card--lg {
    width: 843px;
    flex-shrink: 0;
}

.rj-tech-column .rj-hot__card--sm {
    flex: 1;
    min-width: 0;
    width: 414px;
}

.rj-tech-column .rj-hot__card-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
    z-index: 0;
}

.rj-tech-column .rj-hot__card picture {
    position: absolute;
    inset: 0;
    z-index: 0;
    display: block;
}

.rj-tech-column .rj-hot__card picture .rj-hot__card-img {
    position: absolute;
    inset: 0;
}

.rj-tech-column .rj-hot__card::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient( 180deg, rgba(0, 0, 0, 0) 72.561%, rgba(0, 0, 0, 0.54) 89.812%);
}

.rj-tech-column .rj-hot__badge {
    position: absolute;
    left: 20px;
    top: 20px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 6px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    font-size: 14px;
    line-height: 1.5;
    white-space: nowrap;
}

.rj-tech-column .rj-hot__badge img {
    width: 12px;
    height: 16px;
    display: block;
    flex-shrink: 0;
}

.rj-tech-column .rj-hot__title {
    position: relative;
    z-index: 2;
    width: 100%;
    font-size: 20px;
    font-weight: 700;
    line-height: 1.25;
    color: #fff;
    word-break: break-word;
}

.rj-tech-column .rj-link-list {
    background: var(--rj-bg);
    border-radius: 4px;
    padding: 0 16px;
}

.rj-tech-column .rj-link-list__item {
    display: block;
    height: 60px;
    line-height: 28px;
    padding: 16px 0;
    border-bottom: 0.5px solid var(--rj-line);
    font-size: 16px;
    color: var(--rj-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.2s;
}

.rj-tech-column .rj-link-list__item:last-child {
    border-bottom: none;
}


/* ========== Text cards ========== */

.rj-tech-column .rj-card-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    width: 100%;
}

.rj-tech-column .rj-card-row+.rj-card-row {
    margin-top: 24px;
}

.rj-tech-column .rj-text-card {
    background: var(--rj-bg);
    padding: 16px;
    min-height: 132px;
    width: calc((100% - 48px) / 3);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    transition: box-shadow 0.2s;
}

.rj-tech-column .rj-text-card__title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--rj-text);
    transition: color 0.2s;
    word-break: break-word;
}

.rj-tech-column .rj-text-card__arrow {
    width: 24px;
    height: 24px;
    position: relative;
}

.rj-tech-column .rj-text-card__arrow img {
    width: 24px;
    height: 24px;
}

.rj-tech-column .rj-arrow--hover {
    display: none;
}


/* ========== Feature (方案/趋势) ========== */

.rj-tech-column .rj-feature {
    display: flex;
    gap: 24px;
    align-items: stretch;
    background: #f7f9fa;
    padding: 16px;
    margin-bottom: 24px;
    height: 273px;
    box-sizing: border-box;
    cursor: pointer;
    transition: box-shadow 0.2s;
    color: inherit;
    text-decoration: none;
}

.rj-tech-column .rj-feature__media {
    position: relative;
    width: 441px;
    height: 233px;
    flex-shrink: 0;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 0 16px rgba(17, 66, 133, 0.08);
    background: #0a1628;
}

.rj-tech-column .rj-feature__media img {
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.35s ease;
}

.rj-tech-column .rj-feature__body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    padding: 20px;
}

.rj-tech-column .rj-feature__title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--rj-text);
    transition: color 0.2s;
}

.rj-tech-column .rj-feature__desc {
    font-size: 16px;
    line-height: 1.5;
    color: var(--rj-text-mid);
}

.rj-tech-column .rj-feature__arrow {
    width: 24px;
    height: 24px;
    position: relative;
}

.rj-tech-column .rj-feature__arrow img {
    width: 24px;
    height: 24px;
    position: absolute;
    left: 0;
    top: 0;
}


/* ========== Demo ========== */

.rj-tech-column .rj-demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.rj-tech-column .rj-demo-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
}

.rj-tech-column .rj-demo-card__media {
    position: relative;
    width: 100%;
    aspect-ratio: 408.33 / 224.24;
    overflow: hidden;
    border-radius: 4px 4px 0 0;
}

.rj-tech-column .rj-demo-card__media img.rj-demo-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}


/* 播放按钮已烘焙进 2x 导出图，不再叠一层 */

.rj-tech-column .rj-demo-card__media .rj-play {
    display: none;
}

.rj-tech-column .rj-demo-card__title {
    padding: 16px 0;
    font-size: 18px;
    line-height: 1.5;
    color: var(--rj-text);
    word-break: break-word;
    min-height: 86px;
    box-sizing: border-box;
}


/* ========== Cases ========== */

.rj-tech-column .rj-tabs {
    display: flex;
    width: 100%;
    border-bottom: 1px solid var(--rj-line);
    margin-bottom: 24px;
}

.rj-tech-column .rj-tabs__item {
    padding: 12px 32px;
    font-size: 20px;
    line-height: 1.5;
    color: var(--rj-text-mid);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: color 0.2s;
}

.rj-tech-column .rj-tabs__item.is-active {
    color: var(--rj-red);
    border-bottom-color: var(--rj-red);
}

.rj-tech-column .rj-case-panel {
    display: none;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.rj-tech-column .rj-case-panel.is-active {
    display: grid;
}

.rj-tech-column .rj-case-list {
    width: 100%;
}

.rj-tech-column .rj-case-group {
    display: contents;
}

.rj-tech-column .rj-case-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 4px;
    background: #fff;
    color: inherit;
    text-decoration: none;
}

.rj-tech-column .rj-case-card__img {
    width: 100%;
    aspect-ratio: 408.33 / 230.48;
    overflow: hidden;
}

.rj-tech-column .rj-case-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.rj-tech-column .rj-case-card__body {
  background: #f7f9fa;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
}

.rj-tech-column .rj-case-card__body .rj-more {
  margin-top: auto;
}

.rj-tech-column .rj-case-card__title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--rj-text);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.rj-tech-column .rj-case-card__desc {
    font-size: 16px;
    line-height: 1.5;
    color: var(--rj-text-mid);
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rj-tech-column .rj-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 16px;
    line-height: 1.5;
    color: var(--rj-red);
}

.rj-tech-column .rj-more img {
    width: 24px;
    height: 24px;
}

.rj-tech-column .rj-more--blue {
    color: var(--rj-link);
}


/* ========== Industry ========== */

.rj-tech-column .rj-industry-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.rj-tech-column .rj-industry-card {
    position: relative;
    display: block;
    border-radius: 8px;
    overflow: hidden;
    height: 520px;
    min-height: 520px;
    padding: 40px 24px;
    background: #f7f9fa;
    box-shadow: 0 4px 24px rgba(17, 66, 133, 0.06);
    box-sizing: border-box;
    color: inherit;
    text-decoration: none;
}

.rj-tech-column .rj-industry-card__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: 8px;
    overflow: hidden;
}


/* 设计稿：底色 #f7f9fa + 浅蓝渐变贴图 */

.rj-tech-column .rj-industry-card__bg::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background-color: #f7f9fa;
    background-image: url("../assets/industry-grad.webp");
    background-repeat: no-repeat;
    background-size: 127.35% auto;
    background-position: -13.67% 14.6%;
}

.rj-tech-column .rj-industry-card__bg img {
    position: absolute;
    left: 0;
    top: 65.03%;
    width: 100%;
    height: 52.36%;
    max-width: none;
    object-fit: cover;
    object-position: center;
    z-index: 0;
}


/* 与底部实景图的柔和衔接 */

.rj-tech-column .rj-industry-card__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient( 180deg, #f0f4fa 66.237%, rgba(240, 244, 250, 0) 94.495%);
}

.rj-tech-column .rj-industry-card__body {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.rj-tech-column .rj-industry-card__title {
    font-size: 22px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--rj-link);
}

.rj-tech-column .rj-industry-card__desc {
    font-size: 14px;
    line-height: 1.5;
    color: var(--rj-text-mid);
}

.rj-tech-column .rj-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.rj-tech-column .rj-tag {
    height: 32px;
    padding: 0 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid #fff;
    font-size: 14px;
    color: var(--rj-text);
    display: inline-flex;
    align-items: center;
}


/* ========== FAQ ========== */

.rj-tech-column .rj-faq {
    position: relative;
    padding: 60px 0;
    overflow: hidden;
    background: #fff;
    min-height: 468px;
    box-sizing: border-box;
}

.rj-tech-column .rj-faq__bg {
    position: absolute;
    inset: 0;
    background: center / cover no-repeat;
    opacity: 0.35;
}

.rj-tech-column .rj-faq__inner {
    position: relative;
    z-index: 1;
    max-width: var(--rj-content);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.rj-tech-column .rj-faq__heading {
    font-size: 30px;
    font-weight: 700;
    line-height: 1.5;
    flex-shrink: 0;
    color: var(--rj-text);
}

.rj-tech-column .rj-faq__grid {
    width: 1057px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.rj-tech-column .rj-faq-card {
    background: #fff;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    min-height: 148px;
    color: inherit;
    text-decoration: none;
}

.rj-tech-column .rj-faq-card__title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--rj-text);
    word-break: break-word;
}

.rj-tech-column .rj-faq-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--rj-link);
    font-size: 16px;
}

.rj-tech-column .rj-faq-card__link img {
    width: 24px;
    height: 24px;
}


/* ========== Interactive Hover（桌面指针设备，对齐锐捷组件态） ========== */

@media (hover: hover) and (pointer: fine) {
    /* 侧栏 */
    .rj-tech-column .rj-aside__item:hover {
        color: var(--rj-blue);
    }
    /* 热门图卡 */
    .rj-tech-column .rj-hot__card-img {
        transition: transform 0.4s ease;
    }
    .rj-tech-column .rj-hot__card:hover .rj-hot__card-img {
        transform: scale(1.04);
    }
    .rj-tech-column .rj-hot__title {
        transition: opacity 0.2s;
    }
    .rj-tech-column .rj-hot__card:hover .rj-hot__title {
        opacity: 0.92;
    }
    /* 链接列表 */
    .rj-tech-column .rj-link-list__item:hover {
        color: var(--rj-red);
    }
    /* 文字卡 */
    .rj-tech-column .rj-text-card:hover {
        box-shadow: 0 4px 16px rgba(17, 66, 133, 0.08);
    }
    .rj-tech-column .rj-text-card:hover .rj-text-card__title {
        color: var(--rj-red);
    }
    .rj-tech-column .rj-text-card:hover .rj-text-card__arrow .rj-arrow--default {
        display: none;
    }
    .rj-tech-column .rj-text-card:hover .rj-text-card__arrow .rj-arrow--hover {
        display: block;
    }
    /* 方案 / 趋势大卡 */
    .rj-tech-column .rj-feature:hover {
        box-shadow: 0 4px 16px rgba(17, 66, 133, 0.1);
    }
    .rj-tech-column .rj-feature:hover .rj-feature__title {
        color: var(--rj-red);
    }
    .rj-tech-column .rj-feature:hover .rj-feature__media img {
        transform: scale(1.03);
    }
    .rj-tech-column .rj-feature:hover .rj-feature__arrow .rj-arrow--default {
        display: none;
    }
    .rj-tech-column .rj-feature:hover .rj-feature__arrow .rj-arrow--hover {
        display: block;
    }
    /* 实景演示 */
    .rj-tech-column .rj-demo-card__img {
        transition: transform 0.35s ease;
    }
    .rj-tech-column .rj-demo-card__title {
        transition: color 0.2s;
    }
    .rj-tech-column .rj-demo-card:hover .rj-demo-card__img {
        transform: scale(1.04);
    }
    .rj-tech-column .rj-demo-card:hover .rj-demo-card__title {
        color: var(--rj-red);
    }
    /* 案例 Tab */
    .rj-tech-column .rj-tabs__item:hover {
        color: var(--rj-red);
    }
    /* 落地案例卡 */
    .rj-tech-column .rj-case-card {
        cursor: pointer;
        transition: box-shadow 0.2s;
    }
    .rj-tech-column .rj-case-card__img img {
        transition: transform 0.35s ease;
    }
    .rj-tech-column .rj-case-card__title {
        transition: color 0.2s;
    }
    .rj-tech-column .rj-case-card:hover {
        box-shadow: 0 4px 16px rgba(17, 66, 133, 0.1);
    }
    .rj-tech-column .rj-case-card:hover .rj-case-card__img img {
        transform: scale(1.04);
    }
    .rj-tech-column .rj-case-card:hover .rj-case-card__title {
        color: var(--rj-red);
    }
    .rj-tech-column .rj-more {
        transition: opacity 0.2s, color 0.2s;
    }
    .rj-tech-column .rj-case-card:hover .rj-more,
    .rj-tech-column .rj-more:hover {
        opacity: 0.85;
    }
    .rj-tech-column .rj-more--blue:hover {
        color: #015bb8;
        opacity: 1;
    }
    /* 行业方案卡 */
    .rj-tech-column .rj-industry-card {
        cursor: pointer;
        transition: box-shadow 0.25s ease, transform 0.25s ease;
    }
    .rj-tech-column .rj-industry-card__title {
        transition: color 0.2s;
    }
    .rj-tech-column .rj-industry-card:hover {
        box-shadow: 0 8px 28px rgba(17, 66, 133, 0.12);
        transform: translateY(-2px);
    }
    .rj-tech-column .rj-industry-card:hover .rj-more--blue {
        color: #015bb8;
    }
    /* FAQ 卡 */
    .rj-tech-column .rj-faq-card {
        cursor: pointer;
        transition: box-shadow 0.2s, transform 0.2s;
    }
    .rj-tech-column .rj-faq-card__title {
        transition: color 0.2s;
    }
    .rj-tech-column .rj-faq-card__link {
        transition: color 0.2s, opacity 0.2s;
    }
    .rj-tech-column .rj-faq-card:hover {
        box-shadow: 0 4px 16px rgba(17, 66, 133, 0.1);
        transform: translateY(-2px);
    }
    .rj-tech-column .rj-faq-card:hover .rj-faq-card__title {
        color: var(--rj-link);
    }
    .rj-tech-column .rj-faq-card:hover .rj-faq-card__link {
        opacity: 0.85;
    }
}


/* ========== Tablet ========== */

@media (min-width: 992px) and (max-width: 1499px) {
    .rj-tech-column .rj-banner__inner,
    .rj-tech-column .rj-body,
    .rj-tech-column .rj-faq__inner {
        padding-left: 40px;
        padding-right: 40px;
        max-width: none;
    }
    .rj-tech-column .rj-faq__grid {
        width: auto;
        flex: 1;
    }
    .rj-tech-column .rj-feature {
        height: auto;
        min-height: 273px;
    }
    .rj-tech-column .rj-feature__media {
        width: 36%;
        max-width: 441px;
        height: auto;
        aspect-ratio: 441 / 233;
    }
    .rj-tech-column .rj-hot__card--lg {
        width: 66.22%;
    }
    .rj-tech-column .rj-hot__card--sm {
        width: auto;
    }
}


/* ========== Mobile ========== */

@media (max-width: 991px) {
    /*
   * 全站移动适配：设计稿 375 宽为基准
   * 覆盖主流机型：
   * - iPhone SE / 小屏安卓 320–360
   * - iPhone 12–15 / 常规安卓 375–393
   * - Plus / Pro Max / 大屏安卓 414–430
   */
    .rj-tech-column {
        --rj-fs-hero: clamp(26px, 8.533vw, 32px);
        --rj-fs-section: clamp(20px, 6.4vw, 24px);
        --rj-fs-title: clamp(17px, 5.333vw, 20px);
        --rj-fs-feature-title: clamp(17px, 5.333vw, 20px);
        --rj-fs-hot: clamp(16px, 4.979vw, 18.67px);
        --rj-fs-industry: clamp(18px, 5.867vw, 22px);
        --rj-fs-body: clamp(14px, 4.267vw, 16px);
        --rj-fs-desc: clamp(13px, 3.733vw, 14px);
        --rj-fs-small: clamp(12px, 3.733vw, 14px);
        --rj-fs-faq: clamp(24px, 8vw, 30px);
        --rj-pad-x: clamp(16px, 5.333vw, 20px);
        --rj-pad-y: clamp(32px, 10.667vw, 40px);
        --rj-gap: clamp(16px, 6.4vw, 24px);
        --rj-gap-sm: clamp(12px, 4.267vw, 16px);
        --rj-gap-lg: clamp(28px, 10.667vw, 40px);
        --rj-banner-h: clamp(168px, 56vw, 210px);
        --rj-hot-h: clamp(156px, 49.867vw, 187px);
        --rj-media-h: clamp(156px, 50.133vw, 188px);
        --rj-btn-h: clamp(40px, 12.267vw, 46px);
        --rj-industry-h: clamp(400px, 128vw, 480px);
        --rj-card-min-h: clamp(110px, 35.2vw, 132px);
        font-size: var(--rj-fs-body);
    }
    .rj-tech-column .rj-pc-only {
        display: none !important;
    }
    .rj-tech-column .rj-mobile-only {
        display: block !important;
    }
    /* ----- Banner ----- */
    .rj-tech-column .rj-banner {
        height: auto;
    }
    .rj-tech-column .rj-banner__bg,
    .rj-tech-column .rj-banner__frost {
        display: none;
    }
    .rj-tech-column .rj-banner__inner {
        flex-direction: column;
        height: auto;
        gap: 0;
        max-width: none;
        padding: 0;
    }
    .rj-tech-column .rj-banner__visual {
        width: 100%;
        height: var(--rj-banner-h);
        border-radius: 0;
        box-shadow: 0 0 16px rgba(17, 66, 133, 0.08);
        background: #ebeff3;
    }
    .rj-tech-column .rj-banner__visual img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center center;
    }
    .rj-tech-column .rj-banner__content {
        width: 100%;
        max-width: none;
        height: auto;
        padding: var(--rj-pad-y) var(--rj-pad-x);
        gap: clamp(24px, 8.533vw, 32px);
        background: #ebeff3;
    }
    .rj-tech-column .rj-banner__copy {
        gap: var(--rj-gap-sm);
    }
    .rj-tech-column .rj-banner__title {
        font-size: var(--rj-fs-hero);
    }
    .rj-tech-column .rj-banner__desc {
        font-size: var(--rj-fs-body);
    }
    .rj-tech-column .rj-banner__cta {
        flex-direction: column;
        gap: var(--rj-gap-sm);
        width: 100%;
    }
    .rj-tech-column .rj-btn {
        width: 100%;
        height: var(--rj-btn-h);
        padding: 0 var(--rj-gap-sm);
        font-size: var(--rj-fs-body);
        white-space: normal;
        text-align: center;
    }
    .rj-tech-column .rj-btn--ghost {
        background: #fff;
    }
    .rj-tech-column .rj-crumb {
        display: flex !important;
        align-items: center;
        gap: 8px;
        height: clamp(44px, 13.333vw, 50px);
        padding: 0 var(--rj-pad-x);
        background: var(--rj-bg);
        font-size: var(--rj-fs-body);
        color: var(--rj-text);
    }
    .rj-tech-column .rj-crumb img {
        width: 14px;
        height: 14px;
        object-fit: contain;
    }
    /* ----- Layout ----- */
    .rj-tech-column .rj-body {
        display: block;
        padding: 0;
        max-width: none;
    }
    .rj-tech-column .rj-aside {
        display: none;
    }
    .rj-tech-column .rj-main {
        max-width: none;
        gap: 0;
        padding-bottom: 0;
    }
    .rj-tech-column .rj-section {
        padding: var(--rj-pad-y) var(--rj-pad-x);
        background: #fff;
    }
    .rj-tech-column .rj-section__head {
        display: none;
    }
    .rj-tech-column .rj-section__title--m {
        display: block !important;
        font-size: var(--rj-fs-section);
        margin-bottom: var(--rj-gap-lg);
    }
    /* ----- 热门推荐 ----- */
    .rj-tech-column .rj-hot__cards {
        flex-direction: column;
        height: auto;
        gap: var(--rj-gap);
        margin-bottom: var(--rj-gap);
        overflow: visible;
        border-radius: 0;
    }
    .rj-tech-column .rj-hot__card,
    .rj-tech-column .rj-hot__card--lg,
    .rj-tech-column .rj-hot__card--sm {
        width: 100%;
        height: var(--rj-hot-h);
        min-height: var(--rj-hot-h);
        max-height: var(--rj-hot-h);
        padding: var(--rj-gap-sm);
        border-radius: 0;
        flex: none;
        flex-shrink: 0;
    }
    .rj-tech-column .rj-hot__card::after {
        inset: auto 0 0 0;
        height: clamp(130px, 42.667vw, 160px);
        background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, #000 100%);
    }
    .rj-tech-column .rj-hot__badge {
        left: var(--rj-gap-sm);
        top: var(--rj-gap-sm);
        font-size: var(--rj-fs-small);
    }
    .rj-tech-column .rj-hot__title {
        font-size: var(--rj-fs-hot);
        font-weight: 400;
        line-height: 1.5;
    }
    .rj-tech-column .rj-m-hot-list {
        display: flex !important;
        flex-direction: column;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-m-hot-list .rj-text-card {
        width: 100%;
        min-height: var(--rj-card-min-h);
    }
    /* ----- 技术原理 / 通用文字卡 ----- */
    .rj-tech-column .rj-card-row {
        flex-direction: column;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-card-row+.rj-card-row {
        margin-top: var(--rj-gap);
    }
    .rj-tech-column .rj-text-card {
        width: 100%;
        height: auto;
        min-height: var(--rj-card-min-h);
        padding: var(--rj-gap-sm);
        gap: var(--rj-gap-sm);
    }
    .rj-tech-column .rj-text-card__title {
        font-size: var(--rj-fs-title);
    }
    /* ----- 方案解读 / 趋势观点 ----- */
    .rj-tech-column .rj-feature {
        flex-direction: column;
        height: auto;
        min-height: 0;
        padding: 0;
        gap: 0;
        margin-bottom: var(--rj-gap);
        background: transparent;
        overflow: visible;
    }
    .rj-tech-column .rj-feature__media {
        width: 100%;
        height: var(--rj-media-h);
    }
    .rj-tech-column .rj-feature__body {
        height: auto;
        background: #f7f9fa;
        padding: var(--rj-gap-sm);
        gap: clamp(8px, 2.667vw, 10px);
        justify-content: flex-start;
        overflow: visible;
    }
    .rj-tech-column .rj-feature__title {
        font-size: var(--rj-fs-feature-title);
        font-weight: 600;
        line-height: 1.15;
    }
    .rj-tech-column .rj-feature__desc {
        font-size: var(--rj-fs-desc);
        line-height: 1.5;
        overflow: visible;
        display: block;
    }
    /* ----- 实景演示 ----- */
    .rj-tech-column .rj-demo-grid {
        grid-template-columns: 1fr;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-demo-card__media {
        height: var(--rj-media-h);
        aspect-ratio: auto;
    }
    .rj-tech-column .rj-play {
        width: clamp(40px, 12.8vw, 48px);
        height: clamp(40px, 12.8vw, 48px);
    }
    .rj-tech-column .rj-demo-card__title {
        font-size: var(--rj-fs-body);
        padding: var(--rj-gap-sm) 0 0;
        min-height: 0;
        line-height: 1.5;
    }
    /* ----- 落地案例：手风琴（标题下紧跟内容，再排其他分类） ----- */
    .rj-tech-column .rj-case-list {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .rj-tech-column .rj-case-group {
        display: flex;
        flex-direction: column;
        gap: 0;
    }
    .rj-tech-column .rj-case-group.is-open {
        gap: var(--rj-gap);
        margin-bottom: var(--rj-gap);
    }
    .rj-tech-column .rj-m-case-select {
        display: none !important;
    }
    .rj-tech-column .rj-m-case-select__item {
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        height: var(--rj-btn-h);
        padding: 0 clamp(10px, 3.2vw, 12px);
        background: #f1f3f5;
        border: none;
        border-bottom: 1px solid transparent;
        margin: 0;
        cursor: pointer;
        box-sizing: border-box;
        font-family: inherit;
        text-align: left;
    }
    .rj-tech-column .rj-m-case-select__item.is-active {
        background: #f1f3f5;
        border-bottom-color: var(--rj-red);
    }
    .rj-tech-column .rj-m-case-select__item span {
        font-size: var(--rj-fs-body);
        color: var(--rj-text-mid);
    }
    .rj-tech-column .rj-m-case-select__item.is-active span {
        font-weight: 700;
        color: var(--rj-text);
    }
    .rj-tech-column .rj-m-case-select__item img,
    .rj-tech-column .rj-m-case-select__icon {
        width: 24px;
        height: 24px;
        object-fit: contain;
        flex-shrink: 0;
        display: block;
    }
    .rj-tech-column .rj-case-group .rj-case-panel {
        display: none;
    }
    .rj-tech-column .rj-case-group.is-open .rj-case-panel,
    .rj-tech-column .rj-case-panel.is-active {
        display: flex;
        flex-direction: column;
        grid-template-columns: none;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-case-card {
        width: 100%;
    }
    .rj-tech-column .rj-case-card__img {
        height: var(--rj-media-h);
        aspect-ratio: auto;
    }
    .rj-tech-column .rj-case-card__body {
        padding: var(--rj-gap-sm);
        gap: var(--rj-gap-sm);
    }
    .rj-tech-column .rj-case-card__title {
        white-space: normal;
        overflow: visible;
        text-overflow: unset;
        font-size: var(--rj-fs-feature-title);
        line-height: 1.25;
    }
    .rj-tech-column .rj-case-card__desc {
        font-size: var(--rj-fs-desc);
        -webkit-line-clamp: unset;
        display: block;
        overflow: visible;
    }
    .rj-tech-column .rj-more {
        font-size: var(--rj-fs-body);
    }
    /* ----- 行业方案 ----- */
    .rj-tech-column .rj-industry-grid {
        grid-template-columns: 1fr;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-industry-card {
        height: auto;
        min-height: var(--rj-industry-h);
        padding: clamp(24px, 8.533vw, 32px) var(--rj-pad-x);
    }
    .rj-tech-column .rj-industry-card__body {
        gap: var(--rj-gap-sm);
    }
    .rj-tech-column .rj-industry-card__title {
        font-size: var(--rj-fs-industry);
    }
    .rj-tech-column .rj-industry-card__desc {
        font-size: var(--rj-fs-desc);
    }
    .rj-tech-column .rj-tag {
        height: clamp(28px, 8.533vw, 32px);
        padding: 0 var(--rj-gap-sm);
        font-size: var(--rj-fs-small);
    }
    /* ----- FAQ ----- */
    .rj-tech-column .rj-faq {
        padding: var(--rj-pad-y) var(--rj-pad-x) clamp(60px, 21.333vw, 80px);
        min-height: 0;
    }
    .rj-tech-column .rj-faq__inner {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--rj-gap-lg);
        padding: 0;
    }
    .rj-tech-column .rj-faq__heading,
    .rj-tech-column .rj-faq__title {
        font-size: var(--rj-fs-faq);
    }
    .rj-tech-column .rj-faq__grid {
        width: 100%;
        grid-template-columns: 1fr;
        gap: var(--rj-gap);
    }
    .rj-tech-column .rj-faq-card {
        min-height: var(--rj-card-min-h);
        height: auto;
        padding: clamp(16px, 5.333vw, 20px);
        gap: var(--rj-gap-sm);
    }
    .rj-tech-column .rj-faq-card__title {
        font-size: var(--rj-fs-title);
    }
    .rj-tech-column .rj-faq-card__link {
        font-size: var(--rj-fs-body);
    }
}


/* 超小屏补充（iPhone SE 1/2、部分安卓 320） */

@media (max-width: 359px) {
    .rj-tech-column {
        --rj-pad-x: 14px;
        --rj-pad-y: 28px;
        --rj-gap: 16px;
    }
    .rj-tech-column .rj-banner__title {
        letter-spacing: -0.02em;
    }
    .rj-tech-column .rj-industry-card {
        min-height: 380px;
    }
}