/* 关于我们页面专属样式，复用 solution.css 的 Hero / 按钮 / 卡片 / 区块体系 */
.dl-about-page {
    --about-accent: #2b6cff;
    --about-ink: #20283a;
    --about-muted: #697589;
    --about-line: #e5eaf1;
    background: #fff;
}

/* 锚点区块避开吸顶导航 */
.dl-about-page section[id] {
    scroll-margin-top: 72px;
}

/* 区块导航：等分全宽 */
.dl-about-nav {
    position: sticky;
    top: 64px;
    z-index: 20;
    padding: 0;
    border-bottom: 1px solid var(--about-line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
}

.dl-about-nav .dianle-width {
    width: min(1180px, calc(100% - 48px));
    display: flex;
    justify-content: center;
    gap: 0;
}

.dl-about-nav a {
    flex: 0 1 auto;
    padding: 18px 26px 16px;
    color: #697589;
    font-size: 14px;
    border-bottom: 3px solid transparent;
    transition: color 0.18s ease, border-color 0.18s ease;
}

.dl-about-nav a:hover,
.dl-about-nav a.is-active {
    color: var(--about-accent);
    border-bottom-color: var(--about-accent);
}

/* 左右分栏（公司简介 / 团队文化） */
.dl-about-split {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 56px;
    align-items: center;
}

.dl-about-split.is-reverse {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
}

.dl-about-split.is-reverse .dl-about-split-media {
    order: 2;
}

.dl-about-split-media {
    overflow: hidden;
    background: #dfe8f5;
}

.dl-about-split-media img {
    width: 100%;
    height: 100%;
    min-height: 420px;
    display: block;
    object-fit: cover;
}

.dl-about-split-copy {
    padding: 8px 0;
}

.dl-about-split-copy > small {
    color: var(--about-accent);
    font-size: 12px;
    letter-spacing: 1.5px;
}

.dl-about-split-copy h2 {
    margin: 12px 0 0;
    color: var(--about-ink);
    font-size: 30px;
    font-weight: 600;
    line-height: 1.4;
}

.dl-about-split-copy > p {
    margin: 16px 0 0;
    color: var(--about-muted);
    font-size: 15px;
    line-height: 1.95;
}

/* 数据看板：蓝色色带，呼应首页数据区 */
.dl-about-stats {
    padding: 54px 0;
    background: linear-gradient(120deg, #0a2a66 0%, #123ea0 55%, #1c5cd0 100%);
}

.dl-about-stats .dianle-width {
    width: min(1180px, calc(100% - 48px));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.dl-about-stat {
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.dl-about-stat:last-child {
    border-right: 0;
}

.dl-about-stat strong {
    display: block;
    color: #fff;
    font-size: 42px;
    font-weight: 600;
    line-height: 1.1;
}

.dl-about-stat strong i {
    font-style: normal;
    font-size: 26px;
}

.dl-about-stat span {
    display: block;
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 14px;
}

/* 核心价值观：复用 dl-capability-card，去掉固定最小高度 */
.dl-about-value-grid .dl-capability-item {
    min-height: 0;
}

/* 发展历程：横向时间线 */
.dl-about-timeline {
    margin: 0;
    padding: 30px 0 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}

.dl-about-timeline::before {
    content: "";
    position: absolute;
    top: 38px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: linear-gradient(90deg, rgba(43, 108, 255, 0.15), rgba(43, 108, 255, 0.55), rgba(43, 108, 255, 0.15));
}

.dl-about-timeline li {
    position: relative;
    padding: 0 18px;
    text-align: center;
}

.dl-about-timeline-dot {
    display: block;
    width: 16px;
    height: 16px;
    margin: 0 auto 22px;
    border: 3px solid var(--about-accent);
    border-radius: 50%;
    background: #fff;
    position: relative;
    z-index: 1;
}

.dl-about-timeline b {
    display: block;
    color: var(--about-accent);
    font-size: 26px;
    font-weight: 600;
}

.dl-about-timeline h3 {
    margin: 10px 0 0 !important;
    color: #273044;
    font-size: 17px;
    font-weight: 600;
}

.dl-about-timeline p {
    margin: 8px 0 0 !important;
    color: #7b8597;
    font-size: 13px;
    line-height: 1.8;
}

/* 团队文化关键词 */
.dl-about-culture-list {
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 28px;
}

.dl-about-culture-list li {
    position: relative;
    padding: 12px 14px 12px 16px;
    color: var(--about-muted);
    font-size: 14px;
    border-left: 3px solid var(--about-accent);
    background: #fff;
}

.dl-about-culture-list li b {
    margin-right: 10px;
    color: var(--about-ink);
    font-size: 15px;
    font-weight: 600;
}

/* 联系我们 */
.dl-about-contact {
    padding: 82px 0;
    background: #fff;
}

.dl-about-contact .dianle-width {
    width: min(1180px, calc(100% - 48px));
}

.dl-about-contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.dl-about-contact-item {
    padding: 30px 22px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid #e7ebf2;
    background: #fff;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

a.dl-about-contact-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(25, 45, 85, 0.1);
}

.dl-about-contact-icon {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    color: var(--about-accent);
    background: #eaf1ff;
    border-radius: 50%;
}

.dl-about-contact-icon svg {
    width: 26px;
    height: 26px;
}

.dl-about-contact-item > span {
    margin-top: 16px;
    color: #7b8597;
    font-size: 13px;
}

.dl-about-contact-item > strong {
    margin-top: 6px;
    color: #20283a;
    font-size: 17px;
    font-weight: 600;
    word-break: break-all;
}

.dl-about-contact-qr {
    width: 104px;
    height: 104px;
    margin-top: 10px;
    object-fit: cover;
    border: 1px solid #eef1f6;
}

/* 底部 CTA：视频 + 深色遮罩，白字 */
.dl-about-cta .dl-solution-cta-video {
    display: block;
}

.dl-about-cta .dl-solution-cta-overlay {
    display: none;
}

.dl-about-cta h2 {
    color: #fff;
    font-size: 28px;
    font-weight: 600;
}

.dl-about-cta p {
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
}

/* 响应式 */
@media screen and (max-width: 900px) {
    .dl-about-nav .dianle-width {
        justify-content: flex-start;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .dl-about-nav .dianle-width::-webkit-scrollbar {
        display: none;
    }

    .dl-about-nav a {
        flex: none;
        padding: 16px 18px 14px;
        white-space: nowrap;
    }

    .dl-about-split,
    .dl-about-split.is-reverse {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .dl-about-split.is-reverse .dl-about-split-media {
        order: 0;
    }

    .dl-about-split-media img {
        min-height: 260px;
    }

    .dl-about-stats .dianle-width {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px 0;
    }

    .dl-about-stat:nth-child(2) {
        border-right: 0;
    }

    .dl-about-timeline {
        grid-template-columns: 1fr;
        gap: 28px;
        padding-left: 24px;
    }

    .dl-about-timeline::before {
        top: 8px;
        bottom: 8px;
        left: 31px;
        right: auto;
        width: 2px;
        height: auto;
        background: linear-gradient(180deg, rgba(43, 108, 255, 0.15), rgba(43, 108, 255, 0.55), rgba(43, 108, 255, 0.15));
    }

    .dl-about-timeline li {
        padding: 0 0 0 28px;
        text-align: left;
    }

    .dl-about-timeline-dot {
        position: absolute;
        left: -24px;
        top: 6px;
        margin: 0;
    }

    .dl-about-timeline h3 {
        margin-top: 0 !important;
    }

    .dl-about-contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 640px) {
    .dl-about-split-copy h2 {
        font-size: 24px;
    }

    .dl-about-stats {
        padding: 40px 0;
    }

    .dl-about-stat strong {
        font-size: 32px;
    }

    .dl-about-stat strong i {
        font-size: 20px;
    }

    .dl-about-culture-list {
        grid-template-columns: 1fr;
    }

    .dl-about-contact-grid {
        grid-template-columns: 1fr;
    }

    .dl-about-cta .dianle-width {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }

    .dl-about-cta h2 {
        font-size: 23px;
    }
}