/* ============================================
   美特邦 关于我们页 专属样式
   通用内页Banner / 面包屑样式在 common.css
   ============================================ */

.mtb-pg-about { color: var(--mtb-text); }

/* ---------- 企业简介 ---------- */
.mtb-ab-intro__grid {
    display: grid; grid-template-columns: 560px 1fr;
    gap: 70px; align-items: center;
}
.mtb-ab-intro__media { position: relative; }
.mtb-ab-intro__frame {
    position: absolute; top: -20px; left: -20px;
    width: calc(100% - 30px); height: calc(100% - 30px);
    border: 3px solid var(--mtb-accent); border-radius: 10px; z-index: 0;
}
.mtb-ab-intro__photo {
    position: relative; z-index: 1; border-radius: 10px; overflow: hidden;
    box-shadow: var(--mtb-shadow-lg);
}
.mtb-ab-intro__photo img { width: 100%; height: auto; display: block; }
.mtb-ab-intro__badge {
    position: absolute; right: -18px; bottom: 34px; z-index: 2;
    min-width: 168px; padding: 18px 22px; text-align: center; color: #fff;
    background: linear-gradient(135deg, var(--mtb-primary) 0%, var(--mtb-primary-dark) 100%);
    border-radius: 10px; box-shadow: 0 16px 40px rgba(0,28,62,.35);
}
.mtb-ab-intro__badge b {
    display: block; font-size: 15px; font-weight: 800; letter-spacing: 2px;
}
.mtb-ab-intro__badge b span { font-size: 32px; color: var(--mtb-accent); margin-left: 4px; }
.mtb-ab-intro__badge > span { display: block; font-size: 12px; margin-top: 4px; color: rgba(255,255,255,.8); letter-spacing: 1px; }

.mtb-ab-intro__label {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; letter-spacing: 4px; color: var(--mtb-accent);
    font-weight: 700; margin-bottom: 14px;
}
.mtb-ab-intro__title {
    font-size: 36px; font-weight: 900; color: var(--mtb-primary-dark);
    line-height: 1.4; margin-bottom: 26px; letter-spacing: 1px;
}
.mtb-ab-intro__title span { color: var(--mtb-primary); }
.mtb-ab-intro__text { font-size: 15px; color: #4e5a70; line-height: 2; margin-bottom: 16px; }
.mtb-ab-intro__text strong { color: var(--mtb-primary); font-weight: 700; }
/* 单页正文（后台富文本输出） */
.mtb-ab-intro__body { font-size: 15px; color: #4e5a70; line-height: 2; margin-bottom: 16px; }
.mtb-ab-intro__body p { font-size: 15px; color: #4e5a70; line-height: 2; margin: 0 0 16px; }
.mtb-ab-intro__body strong { color: var(--mtb-primary); font-weight: 700; }
.mtb-ab-intro__body ul { list-style: none; margin: 14px 0 18px; }
.mtb-ab-intro__body li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.mtb-ab-intro__body li::before {
    content: ""; position: absolute; left: 0; top: 11px;
    width: 7px; height: 7px; border-radius: 50%; background: var(--mtb-accent);
}
.mtb-ab-intro__body img {
    display: block; max-width: 100%; height: auto; margin: 20px auto;
    border-radius: 10px; box-shadow: 0 8px 24px rgba(0,45,92,.08);
}
.mtb-ab-intro__list {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 14px 20px; margin: 26px 0 36px;
}
.mtb-ab-intro__list li {
    display: flex; align-items: center; gap: 10px;
    font-size: 14.5px; font-weight: 600; color: #3a465c;
}
.mtb-ab-intro__list i { color: var(--mtb-accent); font-size: 17px; }
.mtb-ab-intro__btns { display: flex; gap: 18px; flex-wrap: wrap; }
/* 浅色底上的描边按钮（覆盖公共 ghost 白字样式） */
.mtb-ab-intro .mtb-btn--ghost {
    border-color: var(--mtb-primary); color: var(--mtb-primary);
}
.mtb-ab-intro .mtb-btn--ghost::before { background: var(--mtb-primary); }
.mtb-ab-intro .mtb-btn--ghost:hover { color: #fff; }

/* ---------- 数据墙 ---------- */
.mtb-ab-stats { position: relative; padding: 78px 0; overflow: hidden; }
.mtb-ab-stats__bg {
    position: absolute; inset: 0;
    background-repeat: no-repeat; background-position: center; background-size: cover;
}
.mtb-ab-stats__mask {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(0,20,45,.93) 0%, rgba(0,58,120,.88) 100%);
}
.mtb-ab-stats__grid {
    position: relative; z-index: 1;
    display: grid; grid-template-columns: repeat(4, 1fr);
}
.mtb-ab-stats__item {
    text-align: center; color: #fff; padding: 10px 18px;
    border-right: 1px solid rgba(255,255,255,.14);
}
.mtb-ab-stats__item:last-child { border-right: 0; }
.mtb-ab-stats__item i { font-size: 30px; color: var(--mtb-accent); margin-bottom: 14px; display: block; }
.mtb-ab-stats__item b {
    display: block; font-size: 46px; font-weight: 900; line-height: 1.1;
    font-family: Arial, "Microsoft YaHei", sans-serif;
}
.mtb-ab-stats__item > span {
    display: block; margin-top: 10px; font-size: 15px;
    color: rgba(255,255,255,.82); letter-spacing: 1px;
}

/* ---------- 企业文化 ---------- */
.mtb-ab-culture__grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
}
.mtb-ab-culture__card {
    position: relative; background: #fff; border-radius: 10px; padding: 44px 30px 38px;
    text-align: center; border: 1px solid var(--mtb-border);
    transition: var(--mtb-transition); overflow: hidden;
}
.mtb-ab-culture__card::before {
    content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--mtb-accent), var(--mtb-accent-2));
    transform: scaleX(0); transform-origin: left; transition: transform .4s ease;
}
.mtb-ab-culture__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--mtb-shadow-lg); border-color: transparent;
}
.mtb-ab-culture__card:hover::before { transform: scaleX(1); }
.mtb-ab-culture__icon {
    width: 78px; height: 78px; margin: 0 auto 24px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 32px; color: #fff;
    background: linear-gradient(135deg, var(--mtb-primary) 0%, var(--mtb-primary-2) 100%);
    box-shadow: 0 12px 28px rgba(0,58,120,.28);
    transition: var(--mtb-transition);
}
.mtb-ab-culture__card:hover .mtb-ab-culture__icon {
    background: linear-gradient(135deg, var(--mtb-accent) 0%, var(--mtb-accent-2) 100%);
    box-shadow: 0 12px 28px rgba(255,143,31,.35);
}
.mtb-ab-culture__card h3 {
    font-size: 20px; font-weight: 800; color: var(--mtb-primary-dark);
    margin-bottom: 14px; letter-spacing: 1px;
}
.mtb-ab-culture__card p { font-size: 14px; color: #6a7689; line-height: 1.9; }

/* ---------- 发展历程（桌面横向时间轴） ---------- */
.mtb-ab-history__track {
    position: relative; display: flex;
    margin-top: 20px; padding-top: 8px;
}
.mtb-ab-history__track::before {
    content: ""; position: absolute; top: 66px; left: 6%; right: 6%;
    height: 2px; background: linear-gradient(90deg, transparent, var(--mtb-primary) 12%, var(--mtb-accent) 88%, transparent);
}
.mtb-ab-history__node {
    position: relative; flex: 1; text-align: center; padding: 0 12px;
}
.mtb-ab-history__year {
    font-size: 30px; font-weight: 900; color: var(--mtb-primary);
    font-family: Arial, sans-serif; letter-spacing: 1px; margin-bottom: 22px;
}
.mtb-ab-history__dot {
    width: 16px; height: 16px; margin: 0 auto 26px; border-radius: 50%;
    background: #fff; border: 4px solid var(--mtb-accent);
    box-shadow: 0 0 0 6px rgba(255,143,31,.15);
    position: relative; z-index: 2;
}
.mtb-ab-history__card {
    background: #fff; border: 1px solid var(--mtb-border); border-radius: 10px;
    padding: 26px 20px 24px; transition: var(--mtb-transition);
}
.mtb-ab-history__card h4 {
    font-size: 17px; font-weight: 800; color: var(--mtb-primary-dark); margin-bottom: 10px;
}
.mtb-ab-history__card p { font-size: 13.5px; color: #6a7689; line-height: 1.85; }
.mtb-ab-history__node:hover .mtb-ab-history__dot {
    background: var(--mtb-accent); transform: scale(1.15);
}
.mtb-ab-history__node:hover .mtb-ab-history__card {
    transform: translateY(-6px); box-shadow: var(--mtb-shadow); border-color: rgba(255,143,31,.4);
}

/* ---------- 5大核心优势 ---------- */
.mtb-ab-adv__grid {
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px;
}
.mtb-ab-adv__card {
    position: relative; background: #fff; border-radius: 10px; padding: 34px 24px 30px;
    border: 1px solid var(--mtb-border); overflow: hidden;
    transition: var(--mtb-transition);
}
.mtb-ab-adv__card::after {
    content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--mtb-accent), var(--mtb-accent-2));
    transform: scaleX(0); transform-origin: left; transition: transform .4s ease;
}
.mtb-ab-adv__card:hover {
    transform: translateY(-8px); box-shadow: var(--mtb-shadow-lg); border-color: transparent;
}
.mtb-ab-adv__card:hover::after { transform: scaleX(1); }
.mtb-ab-adv__top {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px;
}
.mtb-ab-adv__no {
    font-size: 40px; font-weight: 900; line-height: 1;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #cdd8e6, #eef2f7);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.mtb-ab-adv__top i {
    width: 52px; height: 52px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 21px; color: var(--mtb-primary); background: #eef4fb;
    transition: var(--mtb-transition);
}
.mtb-ab-adv__card:hover .mtb-ab-adv__top i {
    color: #fff; background: linear-gradient(135deg, var(--mtb-accent), var(--mtb-accent-2));
}
.mtb-ab-adv__card h3 {
    font-size: 18px; font-weight: 800; color: var(--mtb-primary-dark);
    margin-bottom: 12px; letter-spacing: 1px;
}
.mtb-ab-adv__card p { font-size: 13.5px; color: #6a7689; line-height: 1.9; }

/* ---------- 底部行动号召 ---------- */
.mtb-ab-cta { position: relative; overflow: hidden; }
.mtb-ab-cta__bg {
    position: absolute; inset: 0;
    background-repeat: no-repeat; background-position: center; background-size: cover;
}
.mtb-ab-cta__mask {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(0,20,45,.94) 0%, rgba(0,58,120,.88) 100%);
}
.mtb-ab-cta__inner {
    position: relative; z-index: 1; text-align: center;
    padding: 92px 24px;
}
.mtb-ab-cta__inner h2 {
    font-size: 36px; font-weight: 900; color: #fff;
    letter-spacing: 2px; margin-bottom: 16px;
}
.mtb-ab-cta__inner p {
    font-size: 15.5px; color: rgba(255,255,255,.82);
    max-width: 680px; margin: 0 auto 36px; line-height: 1.9;
}
.mtb-ab-cta__btns { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }

/* ---------- 滚动显现动画（JS 就绪后启用，无JS时内容默认可见） ---------- */
.mtb-pg-about.mtb-ab-ready .mtb-ab-reveal {
    opacity: 0; transform: translateY(34px);
    transition: opacity .7s ease, transform .7s ease;
}
.mtb-pg-about.mtb-ab-ready .mtb-ab-reveal.is-in {
    opacity: 1; transform: none;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
    .mtb-ab-intro__grid { grid-template-columns: 460px 1fr; gap: 48px; }
    .mtb-ab-intro__badge { right: 0; }
    .mtb-ab-culture__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .mtb-ab-adv__grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
    .mtb-ab-intro__grid { grid-template-columns: 1fr; gap: 56px; }
    .mtb-ab-intro__media { max-width: 560px; margin: 0 auto; }
    .mtb-ab-intro__title { font-size: 30px; }
    .mtb-ab-stats { padding: 60px 0; }
    .mtb-ab-stats__grid { grid-template-columns: 1fr 1fr; gap: 36px 0; }
    .mtb-ab-stats__item:nth-child(2) { border-right: 0; }
    .mtb-ab-stats__item:nth-child(1),
    .mtb-ab-stats__item:nth-child(2) { padding-bottom: 30px; }
    .mtb-ab-stats__item:nth-child(1),
    .mtb-ab-stats__item:nth-child(3) { border-right: 1px solid rgba(255,255,255,.14); }

    /* 发展历程改纵向 */
    .mtb-ab-history__track { flex-direction: column; padding-left: 42px; gap: 0; }
    .mtb-ab-history__track::before {
        top: 10px; bottom: 10px; left: 9px; right: auto; width: 2px;
        background: linear-gradient(180deg, var(--mtb-primary), var(--mtb-accent));
    }
    .mtb-ab-history__node {
        text-align: left; padding: 0 0 34px 0; position: relative;
    }
    .mtb-ab-history__year { margin-bottom: 10px; font-size: 26px; }
    .mtb-ab-history__dot {
        position: absolute; left: -39px; top: 6px; margin: 0;
    }
    .mtb-ab-history__card { padding: 22px 22px 20px; }
    .mtb-ab-adv__grid { grid-template-columns: 1fr 1fr; }
    .mtb-ab-cta__inner { padding: 68px 24px; }
    .mtb-ab-cta__inner h2 { font-size: 28px; }
}
@media (max-width: 576px) {
    .mtb-ab-intro__frame { left: -10px; top: -10px; }
    .mtb-ab-intro__badge { right: 10px; bottom: 18px; min-width: 140px; padding: 14px 16px; }
    .mtb-ab-intro__badge b span { font-size: 26px; }
    .mtb-ab-intro__title { font-size: 25px; }
    .mtb-ab-intro__list { grid-template-columns: 1fr; gap: 12px; }
    .mtb-ab-stats__item b { font-size: 34px; }
    .mtb-ab-stats__item i { font-size: 24px; margin-bottom: 10px; }
    .mtb-ab-stats__item > span { font-size: 13px; }
    .mtb-ab-culture__grid { grid-template-columns: 1fr; }
    .mtb-ab-adv__grid { grid-template-columns: 1fr; }
    .mtb-ab-cta__inner h2 { font-size: 23px; letter-spacing: 1px; }
    .mtb-ab-cta__inner p { font-size: 14px; }
    .mtb-ab-cta__btns .mtb-btn { width: 100%; justify-content: center; }
}