/* ============================================
   美特邦 首页样式
   ============================================ */

/* ---------- Hero Banner 幻灯 ---------- */
.mtb-hero { position: relative; }
.mtb-hero__swiper { width: 100%; height: auto; overflow: hidden; }
.mtb-hero .swiper-wrapper { height: auto; }
.mtb-hero .swiper-slide { position: relative; height: auto; }
.mtb-hero__slide-img {
    width: 100%; height: auto; display: block;
    max-height: 760px; object-fit: cover; object-position: center;
}
.mtb-hero__pagination {
    position: absolute; bottom: 34px !important; left: 50% !important;
    transform: translateX(-50%) !important; z-index: 10;
    display: flex; gap: 10px; justify-content: center;
}
.mtb-hero__pagination .swiper-pagination-bullet {
    width: 40px; height: 4px; border-radius: 2px;
    background: rgba(255,255,255,.5); opacity: 1;
    transition: all .3s; margin: 0 !important;
}
.mtb-hero__pagination .swiper-pagination-bullet-active {
    background: var(--mtb-accent); width: 60px;
}

/* ---------- 关于我们 ---------- */
.mtb-about__grid { display: grid; grid-template-columns: 560px 1fr; gap: 64px; align-items: center; }
.mtb-about__media { position: relative; }
.mtb-about__frame {
    position: absolute; top: -18px; left: -18px; width: calc(100% - 26px); height: calc(100% - 26px);
    border: 3px solid var(--mtb-accent); border-radius: 10px; z-index: 0;
}
.mtb-about__photo {
    position: relative; z-index: 1; border-radius: 10px; overflow: hidden;
    box-shadow: 0 20px 54px rgba(0,45,92,.2);
}
.mtb-about__photo img { width: 100%; height: auto; display: block; }
/* 图片下方数字统计条（数字滚动） */
.mtb-about__stats {
    position: relative; z-index: 1; margin-top: 18px;
    display: grid; grid-template-columns: 1fr 1fr;
    border-radius: 10px; overflow: hidden;
    box-shadow: 0 14px 36px rgba(0,45,92,.18);
}
.mtb-about__stat {
    background: linear-gradient(135deg, var(--mtb-primary) 0%, var(--mtb-primary-dark) 100%);
    color: #fff; text-align: center; padding: 22px 16px;
}
.mtb-about__stat + .mtb-about__stat {
    background: linear-gradient(135deg, var(--mtb-accent) 0%, #ef8400 100%);
}
.mtb-about__stat b { font-size: 38px; font-weight: 900; line-height: 1; display: block; }
.mtb-about__stat > span { font-size: 13px; margin-top: 8px; display: block; letter-spacing: 2px; color: rgba(255,255,255,.85); }
/* 右侧特性内的滚动数字 */
.mtb-num { font-style: normal; font-weight: 800; color: var(--mtb-accent); font-size: 15px; }

.mtb-about__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-about__label i { font-size: 14px; }
.mtb-about__title {
    font-size: 38px; font-weight: 900; color: var(--mtb-primary-dark);
    line-height: 1.35; margin-bottom: 28px; letter-spacing: 1px;
}
.mtb-about__title span { color: var(--mtb-primary); }
.mtb-about__text { font-size: 15px; color: #4e5a70; line-height: 2; margin-bottom: 18px; }
.mtb-about__text strong { color: var(--mtb-primary); font-weight: 700; }
.mtb-about__feats {
    display: grid; grid-template-columns: 1fr 1fr; gap: 18px 24px;
    margin: 32px 0 42px; padding: 30px 0;
    border-top: 1px dashed var(--mtb-border); border-bottom: 1px dashed var(--mtb-border);
}
.mtb-about__feat { display: flex; align-items: center; gap: 14px; }
.mtb-about__feat-icon {
    width: 50px; height: 50px; border-radius: 50%; flex-shrink: 0;
    background: linear-gradient(135deg, rgba(0,58,120,.1), rgba(255,143,31,.1));
    display: flex; align-items: center; justify-content: center;
    font-size: 19px; color: var(--mtb-primary); transition: var(--mtb-transition);
}
.mtb-about__feat:hover .mtb-about__feat-icon {
    background: linear-gradient(135deg, var(--mtb-primary), var(--mtb-primary-2));
    color: #fff; transform: scale(1.08);
}
.mtb-about__feat b { font-size: 15px; font-weight: 700; color: var(--mtb-primary-dark); display: block; }
.mtb-about__feat span { font-size: 13px; color: var(--mtb-gray); }

/* ---------- 产品中心 ---------- */
.mtb-pro__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.mtb-pro__card {
    background: #fff; border-radius: 8px; overflow: hidden;
    box-shadow: 0 6px 20px rgba(0,45,92,.06);
    transition: var(--mtb-transition); display: block;
}
.mtb-pro__card:hover { transform: translateY(-12px); box-shadow: var(--mtb-shadow-lg); }
.mtb-pro__thumb { position: relative; overflow: hidden; background: #fff; }
.mtb-pro__thumb img {
    width: 100%; height: auto; display: block;
    transition: transform .6s ease; padding: 14px;
}
.mtb-pro__card:hover .mtb-pro__thumb img { transform: scale(1.07); }
.mtb-pro__mask {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,45,92,0) 30%, rgba(0,45,92,.55) 100%);
    opacity: 0; transition: opacity .4s;
    display: flex; align-items: flex-end; justify-content: flex-end; padding: 22px;
}
.mtb-pro__card:hover .mtb-pro__mask { opacity: 1; }
.mtb-pro__more {
    width: 52px; height: 52px; border-radius: 50%;
    background: var(--mtb-accent); color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 17px;
    transform: translateY(20px); transition: transform .4s ease .05s;
    box-shadow: 0 8px 22px rgba(255,143,31,.45);
}
.mtb-pro__card:hover .mtb-pro__more { transform: translateY(0); }
.mtb-pro__badge {
    position: absolute; top: 18px; left: 18px; z-index: 2;
    background: linear-gradient(135deg, var(--mtb-accent), var(--mtb-accent-2));
    color: #fff; font-size: 12px; font-weight: 700;
    padding: 5px 12px; border-radius: 50px;
    display: inline-flex; align-items: center; gap: 5px;
    box-shadow: 0 4px 12px rgba(255,143,31,.35);
}
.mtb-pro__badge--new { background: linear-gradient(135deg, #00c853, #00a844); box-shadow: 0 4px 12px rgba(0,200,83,.3); }
.mtb-pro__body { padding: 28px 30px; position: relative; }
.mtb-pro__no {
    position: absolute; top: -24px; right: 26px;
    font-size: 56px; font-weight: 900; color: rgba(0,58,120,.07);
    line-height: 1; user-select: none;
}
.mtb-pro__name { font-size: 20px; font-weight: 800; color: var(--mtb-primary-dark); margin-bottom: 10px; transition: color .3s; }
.mtb-pro__card:hover .mtb-pro__name { color: var(--mtb-primary); }
.mtb-pro__desc { font-size: 14px; color: var(--mtb-gray); line-height: 1.7; margin-bottom: 16px; }
.mtb-pro__link {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: 14px; font-weight: 700; color: var(--mtb-primary);
}
.mtb-pro__link i { font-size: 12px; transition: transform .3s; }
.mtb-pro__card:hover .mtb-pro__link i { transform: translateX(5px); }
.mtb-pro__foot { text-align: center; margin-top: 54px; }

/* ---------- 核心优势（5列） ---------- */
.mtb-adv__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.mtb-adv__card {
    background: #fff; border: 1px solid var(--mtb-border); border-radius: 8px;
    padding: 38px 22px; text-align: center; position: relative; overflow: hidden;
    transition: var(--mtb-transition);
}
.mtb-adv__card:hover { transform: translateY(-10px); box-shadow: var(--mtb-shadow-lg); border-color: transparent; }
.mtb-adv__no {
    position: absolute; top: -10px; right: 12px;
    font-size: 56px; font-weight: 900; color: rgba(0,58,120,.06);
    line-height: 1; user-select: none;
}
.mtb-adv__icon {
    width: 76px; height: 76px; margin: 0 auto 20px; border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,58,120,.08), rgba(255,143,31,.08));
    display: flex; align-items: center; justify-content: center;
    font-size: 30px; color: var(--mtb-primary); transition: var(--mtb-transition);
}
.mtb-adv__card:hover .mtb-adv__icon {
    background: linear-gradient(135deg, var(--mtb-primary), var(--mtb-primary-dark));
    color: #fff; transform: scale(1.1);
    box-shadow: 0 10px 28px rgba(0,58,120,.28);
}
.mtb-adv__card h3 { font-size: 18px; font-weight: 800; color: var(--mtb-primary-dark); margin-bottom: 12px; }
.mtb-adv__card p { font-size: 13px; color: var(--mtb-gray); line-height: 1.8; }
.mtb-adv__line {
    width: 36px; height: 3px; margin: 20px auto 0;
    background: linear-gradient(90deg, var(--mtb-primary), var(--mtb-accent));
    border-radius: 2px; transition: width .4s ease;
}
.mtb-adv__card:hover .mtb-adv__line { width: 60px; }

/* ---------- 品质元器件 ---------- */
.mtb-parts__img {
    border-radius: 10px; overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,45,92,.12);
}
.mtb-parts__img img { width: 100%; display: block; }

/* ---------- 数据墙 ---------- */
.mtb-data { position: relative; padding: 100px 0; }
.mtb-data__bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.mtb-data__overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,28,62,.94), rgba(0,58,120,.88)); }
.mtb-data__inner { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.mtb-data__item { text-align: center; color: #fff; }
.mtb-data__item i { font-size: 44px; color: var(--mtb-accent); margin-bottom: 22px; display: block; }
.mtb-data__item b { font-size: 52px; font-weight: 900; display: inline; line-height: 1; }
.mtb-data__item b span { font-size: inherit; color: inherit; }
.mtb-data__item > span:last-child {
    display: block; font-size: 15px; color: rgba(255,255,255,.72);
    margin-top: 14px; letter-spacing: 3px;
}

/* ---------- 新闻动态 ---------- */
.mtb-news__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 32px; }
.mtb-news__main {
    background: #fff; border-radius: 8px; overflow: hidden;
    box-shadow: 0 6px 20px rgba(0,45,92,.06);
    display: block; transition: var(--mtb-transition);
}
.mtb-news__main:hover { transform: translateY(-8px); box-shadow: var(--mtb-shadow-lg); }
.mtb-news__main-thumb { position: relative; height: 340px; overflow: hidden; }
.mtb-news__main-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.mtb-news__main:hover .mtb-news__main-thumb img { transform: scale(1.07); }
.mtb-news__main-date {
    position: absolute; left: 26px; bottom: 26px;
    background: linear-gradient(135deg, var(--mtb-accent), var(--mtb-accent-2));
    color: #fff; padding: 12px 18px; border-radius: 6px; text-align: center; line-height: 1.2;
    box-shadow: 0 8px 20px rgba(255,143,31,.4);
}
.mtb-news__main-date b { font-size: 26px; font-weight: 900; display: block; }
.mtb-news__main-date span { font-size: 12px; }
.mtb-news__main-body { padding: 30px 32px; }
.mtb-news__cat {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 12px; font-weight: 700; color: var(--mtb-accent);
    margin-bottom: 14px;
}
.mtb-news__cat--blue { color: #0ea5e9; }
.mtb-news__cat--green { color: #10b981; }
.mtb-news__main-body h3 {
    font-size: 21px; font-weight: 800; color: var(--mtb-primary-dark);
    line-height: 1.5; margin-bottom: 14px; transition: color .3s;
}
.mtb-news__main:hover .mtb-news__main-body h3 { color: var(--mtb-primary); }
.mtb-news__main-body > p {
    font-size: 14px; color: var(--mtb-gray); line-height: 1.9; margin-bottom: 18px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.mtb-news__more { font-size: 14px; font-weight: 700; color: var(--mtb-primary); display: inline-flex; align-items: center; gap: 7px; }
.mtb-news__more i { transition: transform .3s; }
.mtb-news__main:hover .mtb-news__more i { transform: translateX(6px); }

.mtb-news__side { display: flex; flex-direction: column; gap: 20px; }
.mtb-news__item {
    background: #fff; border-radius: 8px; padding: 24px 26px;
    display: flex; gap: 22px; align-items: center;
    box-shadow: 0 6px 20px rgba(0,45,92,.06); transition: var(--mtb-transition); flex: 1;
}
.mtb-news__item:hover { transform: translateX(10px); box-shadow: 0 14px 36px rgba(0,45,92,.12); }
.mtb-news__item-date {
    background: var(--mtb-bg); color: var(--mtb-primary-dark); text-align: center;
    min-width: 76px; padding: 14px 8px; border-radius: 6px; flex-shrink: 0; line-height: 1.25;
    transition: var(--mtb-transition);
}
.mtb-news__item:hover .mtb-news__item-date { background: var(--mtb-primary); color: #fff; }
.mtb-news__item-date b { font-size: 28px; font-weight: 900; display: block; }
.mtb-news__item-date span { font-size: 12px; color: var(--mtb-gray); }
.mtb-news__item:hover .mtb-news__item-date span { color: rgba(255,255,255,.8); }
.mtb-news__item-body { flex: 1; }
.mtb-news__item-body h4 {
    font-size: 16px; font-weight: 700; color: var(--mtb-primary-dark);
    line-height: 1.5; margin: 8px 0 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    transition: color .3s;
}
.mtb-news__item:hover .mtb-news__item-body h4 { color: var(--mtb-primary); }
.mtb-news__item-body p {
    font-size: 13px; color: var(--mtb-gray); line-height: 1.7;
    display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.mtb-news__item-arrow { color: var(--mtb-gray); font-size: 16px; transition: all .3s; flex-shrink: 0; }
.mtb-news__item:hover .mtb-news__item-arrow { color: var(--mtb-accent); transform: translateX(4px); }
.mtb-news__foot { text-align: center; margin-top: 50px; }

/* ---------- 视频中心 ---------- */
.mtb-vdo__grid { display: grid; grid-template-columns: 1.45fr 1fr; gap: 30px; }
.mtb-vdo__main { cursor: pointer; min-width: 0; }
.mtb-vdo__cover {
    position: relative; border-radius: 8px; overflow: hidden; height: 100%; min-height: 400px;
    box-shadow: 0 10px 36px rgba(0,45,92,.18);
}
.mtb-vdo__cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.mtb-vdo__main:hover .mtb-vdo__cover img { transform: scale(1.06); }
.mtb-vdo__cover::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,28,62,.1) 30%, rgba(0,28,62,.7) 100%);
}
.mtb-vdo__play {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 2;
    width: 92px; height: 92px; border-radius: 50%;
    background: linear-gradient(135deg, var(--mtb-accent), var(--mtb-accent-2));
    color: #fff; font-size: 28px;
    display: flex; align-items: center; justify-content: center; padding-left: 6px;
    box-shadow: 0 0 0 0 rgba(255,143,31,.5); animation: mtbPulse 2.2s infinite;
    transition: transform .3s;
}
.mtb-vdo__main:hover .mtb-vdo__play { transform: translate(-50%,-50%) scale(1.12); }
@keyframes mtbPulse {
    0% { box-shadow: 0 0 0 0 rgba(255,143,31,.5); }
    70% { box-shadow: 0 0 0 28px rgba(255,143,31,0); }
    100% { box-shadow: 0 0 0 0 rgba(255,143,31,0); }
}
.mtb-vdo__cover-info {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
    padding: 26px 30px;
}
.mtb-vdo__cover-info h3 { font-size: 19px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.mtb-vdo__cover-info span { font-size: 13px; color: rgba(255,255,255,.75); }
.mtb-vdo__cover-info i { color: var(--mtb-accent); margin-right: 4px; }

.mtb-vdo__side { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.mtb-vdo__item {
    background: #fff; border-radius: 8px; overflow: hidden;
    display: flex; box-shadow: 0 6px 18px rgba(0,45,92,.06);
    cursor: pointer; transition: var(--mtb-transition); flex: 1;
    min-width: 0;
}
.mtb-vdo__item:hover { transform: translateX(8px); box-shadow: 0 14px 32px rgba(0,45,92,.12); }
.mtb-vdo__thumb {
    position: relative; flex: 0 0 42%; max-width: 42%;
    align-self: stretch; overflow: hidden;
}
.mtb-vdo__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.mtb-vdo__item:hover .mtb-vdo__thumb img { transform: scale(1.08); }
.mtb-vdo__play-sm {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 44px; height: 44px; border-radius: 50%;
    background: rgba(255,143,31,.92); color: #fff; font-size: 14px;
    display: flex; align-items: center; justify-content: center; padding-left: 3px;
    transition: transform .3s;
}
.mtb-vdo__item:hover .mtb-vdo__play-sm { transform: translate(-50%,-50%) scale(1.18); }
.mtb-vdo__info { padding: 18px 20px; display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.mtb-vdo__info h4 { font-size: 16px; font-weight: 700; color: var(--mtb-primary-dark); margin-bottom: 10px; }
.mtb-vdo__info span { font-size: 13px; color: var(--mtb-gray); }
.mtb-vdo__info i { color: var(--mtb-accent); margin-right: 4px; }
.mtb-vdo__more {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    padding: 16px; border-radius: 8px; font-size: 15px; font-weight: 700;
    color: var(--mtb-primary); border: 2px dashed var(--mtb-border);
    transition: var(--mtb-transition);
}
.mtb-vdo__more:hover { border-color: var(--mtb-primary); background: var(--mtb-primary); color: #fff; }
.mtb-vdo__more i:last-child { transition: transform .3s; }
.mtb-vdo__more:hover i:last-child { transform: translateX(5px); }

/* ---------- CTA ---------- */
.mtb-cta { position: relative; padding: 100px 0; }
.mtb-cta__bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.mtb-cta__overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,28,62,.93), rgba(0,58,120,.82)); }
.mtb-cta__inner {
    position: relative; z-index: 2;
    display: flex; align-items: center; justify-content: space-between; gap: 50px;
}
.mtb-cta__tag {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 700; color: var(--mtb-accent);
    margin-bottom: 16px;
}
.mtb-cta__title { font-size: 36px; font-weight: 900; color: #fff; margin-bottom: 16px; letter-spacing: 1px; }
.mtb-cta__desc { font-size: 16px; color: rgba(255,255,255,.78); max-width: 620px; line-height: 1.9; }
.mtb-cta__actions { display: flex; gap: 16px; flex-shrink: 0; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
    .mtb-hero__slide-img { max-height: 560px; }
    .mtb-about__grid { grid-template-columns: 480px 1fr; gap: 48px; }
    .mtb-pro__grid { gap: 18px; }
    .mtb-adv__grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
}
@media (max-width: 992px) {
    .mtb-hero__slide-img { max-height: 440px; }
    .mtb-about__grid { grid-template-columns: 1fr; gap: 48px; }
    .mtb-about__media { max-width: 600px; margin: 0 auto; width: 100%; }
    .mtb-about__title { font-size: 30px; }
    .mtb-pro__grid { grid-template-columns: repeat(2, 1fr); }
    .mtb-adv__grid { grid-template-columns: repeat(2, 1fr); }
    .mtb-data { padding: 70px 0; }
    .mtb-data__inner { grid-template-columns: repeat(2, 1fr); gap: 44px 20px; }
    .mtb-news__grid { grid-template-columns: 1fr; }
    .mtb-vdo__grid { grid-template-columns: 1fr; }
    .mtb-vdo__cover { height: 360px; min-height: 0; }
    .mtb-cta__inner { flex-direction: column; text-align: center; }
    .mtb-cta__title { font-size: 28px; }
    .mtb-cta__desc { margin: 0 auto; }
}
@media (max-width: 576px) {
    .mtb-hero__slide-img { max-height: 320px; }
    .mtb-about__stat { padding: 16px 10px; }
    .mtb-about__stat b { font-size: 30px; }
    .mtb-about__stat > span { font-size: 12px; letter-spacing: 1px; }
    .mtb-about__title { font-size: 24px; }
    .mtb-about__feats { grid-template-columns: 1fr; gap: 14px; padding: 22px 0; }
    .mtb-pro__grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .mtb-pro__thumb img { padding: 8px; }
    .mtb-pro__body { padding: 18px 16px; }
    .mtb-pro__name { font-size: 16px; }
    .mtb-adv__grid { grid-template-columns: 1fr; }
    .mtb-adv__card { padding: 34px 24px; }
    .mtb-data__item b { font-size: 40px; }
    .mtb-data__item i { font-size: 34px; }
    .mtb-news__main-thumb { height: 230px; }
    .mtb-news__main-body h3 { font-size: 18px; }
    .mtb-vdo__thumb { flex-basis: 38%; max-width: 38%; }
    .mtb-vdo__cover { height: 250px; }
    .mtb-vdo__play { width: 68px; height: 68px; font-size: 22px; }
    .mtb-cta { padding: 64px 0; }
    .mtb-cta__title { font-size: 22px; }
    .mtb-cta__desc { font-size: 14px; }
    .mtb-cta__actions { flex-direction: column; width: 100%; }
    .mtb-cta__actions .mtb-btn { justify-content: center; }
}