/* ============================================
   美特邦自动化设备 公共样式
   头部 / 尾部 / 通用组件
   ============================================ */

/* ---------- 全局基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333e52; line-height: 1.7; background: #fff;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: all .3s ease; }
ul, li { list-style: none; }
img { max-width: 100%; display: block; border: 0; }
input, button { font-family: inherit; outline: none; border: none; background: none; }

/* ---------- 主题变量 ---------- */
:root {
    --mtb-primary: #003a78;        /* 主色 深蓝 */
    --mtb-primary-2: #012a57;      /* 次深蓝 */
    --mtb-primary-dark: #001c3e;   /* 最深 */
    --mtb-accent: #ff8f1f;         /* 活力橙 */
    --mtb-accent-2: #ff6b00;
    --mtb-gold: #d4a44e;           /* 金色点缀 */
    --mtb-text: #333e52;
    --mtb-gray: #8491a5;
    --mtb-border: #e9edf3;
    --mtb-bg: #f7f9fc;             /* 浅灰底 */
    --mtb-container: 1450px;
    --mtb-radius: 6px;
    --mtb-shadow: 0 10px 40px rgba(0,45,92,.1);
    --mtb-shadow-lg: 0 20px 60px rgba(0,45,92,.16);
    --mtb-transition: all .35s cubic-bezier(.25,.8,.25,1);
}

/* ---------- 通用容器 ---------- */
.mtb-container { width: 100%; max-width: var(--mtb-container); margin: 0 auto; padding: 0 24px; }

/* ---------- 通用区块标题 ---------- */
.mtb-section { padding: 100px 0; }
.mtb-section--bg { background: var(--mtb-bg); }
.mtb-head { text-align: center; margin-bottom: 60px; }
.mtb-head__label {
    display: inline-flex; align-items: center; gap: 10px;
    font-size: 13px; letter-spacing: 5px; color: var(--mtb-accent);
    font-weight: 700; text-transform: uppercase;
}
.mtb-head__label::before, .mtb-head__label::after {
    content: ""; width: 34px; height: 1px; background: var(--mtb-accent);
}
.mtb-head__title {
    font-size: 40px; font-weight: 800; color: var(--mtb-primary-dark);
    letter-spacing: 2px; margin: 12px 0 14px; line-height: 1.3;
}
.mtb-head__title span { color: var(--mtb-primary); }
.mtb-head__bar {
    width: 70px; height: 4px; background: linear-gradient(90deg, var(--mtb-accent), var(--mtb-accent-2));
    margin: 0 auto 16px; border-radius: 2px; position: relative;
}
.mtb-head__bar::after {
    content: ""; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
    width: 10px; height: 10px; background: #fff; border: 2px solid var(--mtb-accent); border-radius: 50%;
}
.mtb-head__desc { font-size: 15px; color: var(--mtb-gray); max-width: 640px; margin: 0 auto; }

/* ---------- 通用按钮 ---------- */
.mtb-btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 15px 40px; font-size: 15px; font-weight: 700; letter-spacing: 1px;
    border-radius: 50px; cursor: pointer; transition: var(--mtb-transition);
    position: relative; overflow: hidden; z-index: 1;
}
.mtb-btn::before {
    content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
    background: var(--mtb-primary-dark); transform: scaleX(0); transform-origin: right; transition: transform .4s ease;
}
.mtb-btn:hover::before { transform: scaleX(1); transform-origin: left; }
.mtb-btn--primary { background: var(--mtb-primary); color: #fff; }
.mtb-btn--accent { background: linear-gradient(135deg, var(--mtb-accent), var(--mtb-accent-2)); color: #fff; box-shadow: 0 8px 24px rgba(255,143,31,.3); }
.mtb-btn--ghost { border: 2px solid rgba(255,255,255,.55); color: #fff; }
.mtb-btn--ghost::before { background: rgba(255,255,255,.15); }
.mtb-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0,45,92,.25); }

/* ============================================
   头部
   ============================================ */
.mtb-header { position: relative; z-index: 200; }

/* 顶部条 */
.mtb-topbar {
    background: var(--mtb-primary-dark); color: rgba(255,255,255,.7);
    font-size: 13px; line-height: 42px; height: 42px; position: relative; z-index: 50;
}
.mtb-topbar__inner { display: flex; justify-content: space-between; align-items: center; height: 42px; }
.mtb-topbar__left { display: flex; gap: 28px; }
.mtb-topbar__item { display: inline-flex; align-items: center; gap: 7px; }
.mtb-topbar__item i { color: var(--mtb-accent); font-size: 12px; }
.mtb-topbar__right { display: flex; align-items: center; gap: 24px; }
.mtb-topbar__hotline { display: inline-flex; align-items: center; gap: 8px; }
.mtb-topbar__hotline i { color: var(--mtb-accent); }
.mtb-topbar__hotline b { color: var(--mtb-accent); font-size: 16px; font-weight: 800; }

/* 多语言下拉 */
.mtb-lang { position: relative; }
.mtb-lang__toggle {
    display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
    color: rgba(255,255,255,.85); font-size: 13px; padding: 0 4px; user-select: none;
}
.mtb-lang__toggle i:last-child { font-size: 10px; transition: transform .3s; }
.mtb-lang__menu {
    position: absolute; top: calc(100% + 6px); right: 0; min-width: 140px;
    background: #fff; border-radius: var(--mtb-radius); box-shadow: var(--mtb-shadow-lg);
    padding: 6px 0; opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: all .3s ease; z-index: 10;
}
.mtb-lang--open .mtb-lang__menu { opacity: 1; visibility: visible; transform: translateY(0); }
.mtb-lang--open .mtb-lang__toggle i:last-child { transform: rotate(180deg); }
.mtb-lang__menu a {
    display: flex; align-items: center; gap: 10px; padding: 10px 18px;
    font-size: 13px; color: var(--mtb-text); transition: var(--mtb-transition);
}
.mtb-lang__menu a:hover { background: var(--mtb-bg); color: var(--mtb-primary); padding-left: 24px; }
.mtb-lang__menu .mtb-lang__active { color: var(--mtb-accent); font-weight: 700; }
.mtb-lang__menu .mtb-lang__active i { font-size: 10px; }

/* 导航主体 */
.mtb-navbar { background: #fff; box-shadow: 0 4px 20px rgba(0,45,92,.08); }
.mtb-navbar__inner { display: flex; align-items: center; justify-content: space-between; height: 96px; }

/* LOGO */
.mtb-logo { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.mtb-logo__img { display: block; height: 58px; width: auto; }
/* 深色尾部背景下 logo 带白底承托 */
.mtb-logo__img--drawer { height: 38px; }
.mtb-logo__img--footer { height: 62px; background: #fff; border-radius: 8px; padding: 8px 14px; box-sizing: border-box; }
.mtb-logo__mark {
    width: 54px; height: 54px; border-radius: 10px;
    background: linear-gradient(135deg, var(--mtb-primary) 0%, var(--mtb-primary-dark) 100%);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 28px; font-weight: 900; font-style: italic;
    box-shadow: 0 6px 18px rgba(0,58,120,.3); position: relative; overflow: hidden;
}
.mtb-logo__mark::after {
    content: ""; position: absolute; top: -50%; right: -50%; width: 60%; height: 100%;
    background: rgba(255,255,255,.12); transform: rotate(30deg);
}
.mtb-logo__name { font-size: 22px; font-weight: 900; color: var(--mtb-primary-dark); letter-spacing: 1px; line-height: 1.2; }
.mtb-logo__name span { color: var(--mtb-accent); }
.mtb-logo__en { font-size: 11px; color: var(--mtb-gray); letter-spacing: 3px; text-transform: uppercase; margin-top: 2px; }

/* 导航 */
.mtb-nav { display: flex; align-items: center; height: 96px; }
.mtb-nav__item { position: relative; height: 100%; display: flex; align-items: center; }
.mtb-nav__link {
    --mtb-nav-pad: 18px;
    position: relative; display: inline-flex; align-items: center; gap: 6px;
    padding: 0 var(--mtb-nav-pad); font-size: 15px; font-weight: 700; color: var(--mtb-text); height: 100%;
    white-space: nowrap;
}
.mtb-nav__link::after {
    content: ""; position: absolute; left: var(--mtb-nav-pad); right: var(--mtb-nav-pad); bottom: 24px;
    height: 3px; background: var(--mtb-accent); border-radius: 2px;
    transform: scaleX(0); transform-origin: center; transition: transform .35s ease;
}
.mtb-nav__link:hover, .mtb-nav__link--active { color: var(--mtb-primary); }
.mtb-nav__link:hover::after, .mtb-nav__link--active::after { transform: scaleX(1); }
.mtb-nav__link > i { font-size: 10px; color: var(--mtb-gray); transition: transform .3s; }
.mtb-nav__item:hover .mtb-nav__link > i { transform: rotate(180deg); }

/* 下拉子菜单 */
.mtb-nav__dropdown {
    position: absolute; top: 100%; left: 50%; transform: translate(-50%, 12px);
    min-width: 200px; background: #fff; border-radius: var(--mtb-radius);
    box-shadow: var(--mtb-shadow-lg); padding: 10px 0;
    opacity: 0; visibility: hidden; transition: all .3s ease;
    border-top: 3px solid var(--mtb-accent);
}
.mtb-nav__item:hover .mtb-nav__dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.mtb-nav__dropdown a {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 22px; font-size: 14px; color: var(--mtb-text);
    border-left: 3px solid transparent; transition: var(--mtb-transition);
}
.mtb-nav__dropdown a i { font-size: 10px; color: var(--mtb-gray); opacity: 0; transition: all .3s; }
.mtb-nav__dropdown a:hover {
    background: var(--mtb-bg); color: var(--mtb-primary);
    border-left-color: var(--mtb-accent); padding-left: 28px;
}
.mtb-nav__dropdown a:hover i { opacity: 1; color: var(--mtb-accent); }

/* 右侧操作 */
.mtb-navbar__actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.mtb-navbar__search {
    width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--mtb-border);
    display: flex; align-items: center; justify-content: center;
    color: var(--mtb-primary); cursor: pointer; transition: var(--mtb-transition);
}
.mtb-navbar__search:hover { background: var(--mtb-primary); color: #fff; border-color: var(--mtb-primary); transform: rotate(90deg); }
.mtb-navbar__tel {
    display: flex; align-items: center; gap: 10px; padding: 10px 22px;
    background: linear-gradient(135deg, var(--mtb-primary), var(--mtb-primary-2));
    color: #fff; border-radius: 50px; font-size: 14px; font-weight: 700;
}
.mtb-navbar__tel i { color: var(--mtb-accent); font-size: 16px; }
.mtb-navbar__tel b { font-size: 16px; }

/* 汉堡按钮 */
.mtb-burger {
    display: none; width: 46px; height: 46px; cursor: pointer;
    flex-direction: column; align-items: center; justify-content: center; gap: 6px;
    border: 1px solid var(--mtb-border); border-radius: var(--mtb-radius);
}
.mtb-burger span { display: block; width: 22px; height: 2px; background: var(--mtb-primary); transition: all .35s; border-radius: 2px; }
.mtb-burger--open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.mtb-burger--open span:nth-child(2) { opacity: 0; }
.mtb-burger--open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* 移动端抽屉 */
.mtb-drawer {
    position: fixed; top: 0; right: -340px; width: 320px; height: 100vh;
    background: #fff; z-index: 1000; box-shadow: -10px 0 40px rgba(0,20,45,.15);
    transition: right .4s cubic-bezier(.25,.8,.25,1); overflow-y: auto;
}
.mtb-drawer--open { right: 0; }
.mtb-drawer__head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 22px 26px; border-bottom: 1px solid var(--mtb-border);
}
.mtb-drawer__head .mtb-logo__name { font-size: 18px; }
.mtb-drawer__close {
    width: 36px; height: 36px; border-radius: 50%; background: var(--mtb-bg);
    display: flex; align-items: center; justify-content: center;
    color: var(--mtb-gray); cursor: pointer; font-size: 18px; transition: var(--mtb-transition);
}
.mtb-drawer__close:hover { background: var(--mtb-primary); color: #fff; }
.mtb-drawer__nav { padding: 10px 0; }
.mtb-drawer__link {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 26px; font-size: 16px; font-weight: 700;
    color: var(--mtb-text); border-bottom: 1px solid var(--mtb-bg);
    transition: var(--mtb-transition);
}
.mtb-drawer__link:hover, .mtb-drawer__link--active { color: var(--mtb-primary); background: var(--mtb-bg); padding-left: 34px; }
.mtb-drawer__link i { font-size: 12px; color: var(--mtb-gray); }
.mtb-drawer__foot { padding: 26px; margin-top: 20px; }
.mtb-drawer__foot-tel {
    display: flex; align-items: center; gap: 12px; padding: 14px 18px;
    background: var(--mtb-bg); border-radius: var(--mtb-radius); margin-bottom: 12px;
}
.mtb-drawer__foot-tel i { color: var(--mtb-accent); font-size: 18px; }
.mtb-drawer__foot-tel div span { display: block; font-size: 11px; color: var(--mtb-gray); }
.mtb-drawer__foot-tel div b { font-size: 16px; color: var(--mtb-primary); }
.mtb-drawer__mask {
    position: fixed; inset: 0; background: rgba(0,20,45,.55); z-index: 999;
    opacity: 0; visibility: hidden; transition: all .35s;
    backdrop-filter: blur(2px);
}
.mtb-drawer__mask--show { opacity: 1; visibility: visible; }

/* ---------- 搜索弹层（公共组件，各栏目通用） ---------- */
.mtb-search-layer {
    position: fixed; inset: 0; z-index: 2000;
    background: rgba(0,20,45,.92); backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: all .4s ease;
}
.mtb-search-layer--open { opacity: 1; visibility: visible; }
.mtb-search-layer__close {
    position: absolute; top: 30px; right: 36px;
    width: 50px; height: 50px; border-radius: 50%;
    background: rgba(255,255,255,.1); color: #fff; font-size: 22px;
    display: flex; align-items: center; justify-content: center; cursor: pointer;
    transition: var(--mtb-transition);
}
.mtb-search-layer__close:hover { background: var(--mtb-accent); transform: rotate(90deg); }
.mtb-search-layer__inner { width: 100%; max-width: 640px; padding: 0 24px; text-align: center; }
.mtb-search-layer__inner h3 { font-size: 28px; color: #fff; font-weight: 800; margin-bottom: 30px; letter-spacing: 2px; }
.mtb-search-layer__box {
    display: flex; gap: 0; background: #fff; border-radius: 50px; overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.mtb-search-layer__box input {
    flex: 1; padding: 18px 28px; font-size: 16px; color: var(--mtb-text);
}
.mtb-search-layer__box input::placeholder { color: #aaa; }
.mtb-search-layer__box button {
    width: 70px; background: var(--mtb-primary); color: #fff; font-size: 20px;
    cursor: pointer; transition: var(--mtb-transition);
}
.mtb-search-layer__box button:hover { background: var(--mtb-accent); }
@media (max-width: 576px) {
    .mtb-search-layer__close { top: 18px; right: 18px; width: 42px; height: 42px; }
    .mtb-search-layer__inner h3 { font-size: 22px; margin-bottom: 22px; }
}

/* ============================================
   尾部
   ============================================ */
.mtb-footer { background: #0a1d38; color: rgba(255,255,255,.65); font-size: 14px; position: relative; }
.mtb-footer::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--mtb-primary), var(--mtb-accent), var(--mtb-primary));
}

.mtb-footer__main { padding: 76px 0 56px; }
.mtb-footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 52px; }
.mtb-footer__brand .mtb-logo__name { color: #fff; }
.mtb-footer__brand .mtb-logo__en { color: rgba(255,255,255,.35); }
.mtb-footer__intro { margin: 22px 0; line-height: 2; font-size: 13px; }
.mtb-footer__social { display: flex; gap: 10px; }
.mtb-footer__social a {
    width: 40px; height: 40px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,.18);
    display: flex; align-items: center; justify-content: center; font-size: 15px;
    transition: var(--mtb-transition);
}
.mtb-footer__social a:hover {
    background: var(--mtb-accent); border-color: var(--mtb-accent);
    color: #fff; transform: translateY(-4px); box-shadow: 0 8px 20px rgba(255,143,31,.3);
}
/* 微信图标 hover 弹出二维码 */
.mtb-footer__wx { position: relative; display: inline-flex; }
.mtb-footer__wx-pop {
    position: absolute; left: 0; bottom: calc(100% + 12px); z-index: 30;
    width: 134px; padding: 12px 12px 10px; background: #fff; border-radius: 10px;
    text-align: center; box-shadow: 0 14px 36px rgba(0,0,0,.3);
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
    pointer-events: none;
}
.mtb-footer__wx-pop::after {
    content: ""; position: absolute; left: 14px; bottom: -6px;
    width: 12px; height: 12px; background: #fff; transform: rotate(45deg);
}
.mtb-footer__wx-pop img { width: 110px; height: 110px; display: block; border-radius: 4px; }
.mtb-footer__wx-pop em { font-style: normal; font-size: 12px; color: #555; display: block; margin-top: 6px; }
.mtb-footer__wx:hover .mtb-footer__wx-pop {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.mtb-footer__title {
    font-size: 17px; color: #fff; font-weight: 700; margin-bottom: 26px;
    padding-bottom: 14px; position: relative;
}
.mtb-footer__title::after {
    content: ""; position: absolute; left: 0; bottom: 0; width: 34px; height: 3px;
    background: var(--mtb-accent); border-radius: 2px;
}
.mtb-footer__links li { margin-bottom: 13px; }
.mtb-footer__links a { display: inline-flex; align-items: center; gap: 9px; transition: var(--mtb-transition); }
.mtb-footer__links a i { font-size: 9px; color: var(--mtb-accent); transition: transform .3s; }
.mtb-footer__links a:hover { color: var(--mtb-accent); }
.mtb-footer__links a:hover i { transform: translateX(4px); }

/* 产品中心子栏目：每列默认显示 5 条，多出的自动换到下一列 */
.mtb-footer__links--prod {
    display: grid;
    grid-auto-flow: column;
    grid-template-rows: repeat(5, auto);
    grid-auto-columns: max-content;
    column-gap: 20px;
    row-gap: 0;
}
.mtb-footer__links--prod li { margin-bottom: 13px; }
.mtb-footer__contact li { display: flex; gap: 14px; margin-bottom: 18px; line-height: 1.8; }
.mtb-footer__contact i { color: var(--mtb-accent); margin-top: 5px; font-size: 15px; flex-shrink: 0; }

.mtb-footer__bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; }
.mtb-footer__bottom-inner { display: flex; justify-content: space-between; align-items: center; font-size: 13px; flex-wrap: wrap; gap: 10px; }
.mtb-footer__bottom a { transition: var(--mtb-transition); }
.mtb-footer__bottom a:hover { color: var(--mtb-accent); }

/* 右侧在线客服（含返回顶部） */
.mtb-service {
    position: fixed; right: 16px; top: 68%; transform: translateY(-50%);
    z-index: 1500; display: flex; flex-direction: column;
    border-radius: 10px; overflow: visible;
    box-shadow: 0 10px 34px rgba(0,45,92,.22);
}
.mtb-service__item { position: relative; }
.mtb-service__item + .mtb-service__item { margin-top: 2px; }
.mtb-service__btn {
    width: 62px; height: 62px; background: var(--mtb-primary); color: #fff;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 3px; cursor: pointer; font-size: 19px; transition: var(--mtb-transition);
    user-select: none;
}
.mtb-service__btn small { font-size: 11px; letter-spacing: 1px; }
.mtb-service__item:first-child .mtb-service__btn { border-radius: 10px 10px 0 0; }
.mtb-service__item:last-child .mtb-service__btn { border-radius: 0 0 10px 10px; }
.mtb-service__item:only-child .mtb-service__btn { border-radius: 10px; }
.mtb-service__btn:hover { background: var(--mtb-accent); }
/* 弹出面板 */
.mtb-service__panel {
    position: absolute; right: calc(100% + 14px); top: 50%; transform: translateY(-50%) translateX(12px);
    background: #fff; border-radius: 10px; padding: 18px 20px;
    width: 208px; text-align: center;
    box-shadow: 0 14px 44px rgba(0,45,92,.2);
    opacity: 0; visibility: hidden; transition: all .3s ease;
    pointer-events: none;
}
.mtb-service__panel::after {
    content: ""; position: absolute; left: 100%; top: 50%; transform: translateY(-50%);
    border: 8px solid transparent; border-left-color: #fff;
}
.mtb-service__item:hover .mtb-service__panel {
    opacity: 1; visibility: visible; transform: translateY(-50%) translateX(0);
    pointer-events: auto;
}
.mtb-service__panel-title {
    font-size: 14px; font-weight: 700; color: var(--mtb-primary-dark); margin-bottom: 10px;
}
.mtb-service__tel {
    display: block; font-size: 20px; font-weight: 900; color: var(--mtb-accent);
    letter-spacing: .5px; line-height: 1.3; margin-bottom: 6px;
}
.mtb-service__mail {
    display: block; font-size: 14px; font-weight: 700; color: var(--mtb-primary);
    word-break: break-all; line-height: 1.5; margin-bottom: 6px;
}
.mtb-service__panel p { font-size: 12px; color: var(--mtb-gray); margin: 0; }
.mtb-service__qr {
    display: block; width: 150px; height: 150px; aspect-ratio: 1 / 1;
    object-fit: cover; margin: 0 auto 8px; border: 1px solid var(--mtb-border); border-radius: 6px;
}
/* 返回顶部按钮：滚动后才显示 */
#mtb-backtop { opacity: 0; visibility: hidden; transform: translateY(8px); transition: var(--mtb-transition); }
#mtb-backtop.mtb-service__item--show { opacity: 1; visibility: visible; transform: translateY(0); }
#mtb-backtop .mtb-service__btn { border-radius: 0 0 10px 10px; }
#mtb-backtop .mtb-service__btn:hover { background: var(--mtb-accent); }
/* 未滚动时邮箱按钮承担底部圆角 */
.mtb-service:not(.mtb-service--scrolled) .mtb-service__item:nth-last-child(2) .mtb-service__btn {
    border-radius: 0 0 10px 10px;
}
@media (max-width: 768px) {
    .mtb-service { right: 10px; }
    .mtb-service__btn { width: 50px; height: 50px; font-size: 16px; }
    .mtb-service__btn small { font-size: 10px; }
    .mtb-service__panel { width: 178px; padding: 14px 16px; }
    .mtb-service__qr { width: 124px; height: 124px; }
    .mtb-service__tel { font-size: 17px; }
}

/* ============================================
   通用内页 Banner（各栏目复用，仅换图与文字）
   用法：
   <section class="mtb-pagebanner">
     <div class="mtb-pagebanner__bg" style="background-image:url('image/xxx.jpg')"></div>
     <div class="mtb-pagebanner__mask"></div>
     <div class="mtb-pagebanner__inner">
       <span class="mtb-pagebanner__en">ABOUT US</span>
       <h1 class="mtb-pagebanner__title">关于我们</h1>
       <div class="mtb-pagebanner__bar"></div>
       <p class="mtb-pagebanner__desc">栏目介绍文字</p>
     </div>
   </section>
   左对齐追加修饰类：mtb-pagebanner--left
   ============================================ */
.mtb-pagebanner {
    position: relative; width: 100%; min-height: 420px;
    display: flex; align-items: center; justify-content: center; text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--mtb-primary-dark) 0%, var(--mtb-primary) 58%, #0a4f96 100%);
}
.mtb-pagebanner__bg {
    position: absolute; inset: 0;
    background-repeat: no-repeat; background-position: center; background-size: cover;
    opacity: .38;
}
.mtb-pagebanner__mask {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,20,45,.55) 0%, rgba(0,58,120,.42) 55%, rgba(0,20,45,.78) 100%);
}
/* 装饰斜条 */
.mtb-pagebanner::before {
    content: ""; position: absolute; top: -60%; right: -8%; width: 340px; height: 220%;
    background: linear-gradient(180deg, rgba(255,143,31,.14), rgba(255,143,31,0));
    transform: skewX(-18deg); z-index: 1; pointer-events: none;
}
/* 大号水印英文 */
.mtb-pagebanner::after {
    content: "MEITEBANG"; position: absolute; right: -1.5%; bottom: -14px;
    font-size: 140px; font-weight: 900; letter-spacing: 10px; line-height: 1;
    color: rgba(255,255,255,.05); white-space: nowrap; pointer-events: none;
}
.mtb-pagebanner__inner {
    position: relative; z-index: 2; width: 100%;
    max-width: var(--mtb-container); padding: 90px 24px;
}
.mtb-pagebanner__en {
    display: inline-block; font-size: 14px; font-weight: 700;
    letter-spacing: 8px; color: var(--mtb-accent); text-transform: uppercase;
    margin-bottom: 18px;
}
.mtb-pagebanner__title {
    font-size: 46px; font-weight: 900; color: #fff;
    letter-spacing: 5px; line-height: 1.2;
}
.mtb-pagebanner__bar {
    width: 76px; height: 4px; margin: 24px auto 0; border-radius: 2px;
    background: linear-gradient(90deg, var(--mtb-accent), var(--mtb-accent-2));
    position: relative;
}
.mtb-pagebanner__bar::after {
    content: ""; position: absolute; left: 50%; top: 50%;
    transform: translate(-50%,-50%);
    width: 10px; height: 10px; background: #fff;
    border: 2px solid var(--mtb-accent); border-radius: 50%;
}
.mtb-pagebanner__desc {
    margin-top: 24px; font-size: 16px; line-height: 1.9;
    color: rgba(255,255,255,.88); letter-spacing: 1px;
}
/* 左对齐变体（其他栏目按需调用） */
.mtb-pagebanner--left { justify-content: flex-start; text-align: left; }
.mtb-pagebanner--left .mtb-pagebanner__bar { margin-left: 0; margin-right: 0; }

/* ---------- 通用面包屑 ---------- */
.mtb-crumb {
    position: relative; z-index: 3;
    background: var(--mtb-bg); border-bottom: 1px solid var(--mtb-border);
    font-size: 14px; color: var(--mtb-gray);
}
.mtb-crumb__inner {
    display: flex; align-items: center; flex-wrap: wrap;
    gap: 8px 12px; padding-top: 15px; padding-bottom: 15px;
}
.mtb-crumb a { color: var(--mtb-gray); }
.mtb-crumb a:hover { color: var(--mtb-accent); }
.mtb-crumb__home i { margin-right: 6px; color: var(--mtb-primary); }
.mtb-crumb__sep { font-size: 13px; color: #c2ccd9; }
.mtb-crumb__current { color: var(--mtb-primary); font-weight: 700; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
    .mtb-nav__link { --mtb-nav-pad: 12px; font-size: 14px; }
    .mtb-navbar__tel { display: none; }
    .mtb-logo__img { height: 46px; }
    .mtb-footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 992px) {
    .mtb-navbar__inner { height: 76px; }
    .mtb-nav, .mtb-navbar__search { display: none; }
    .mtb-burger { display: flex; }
    .mtb-topbar__left .mtb-topbar__item:nth-child(2) { display: none; }
    .mtb-section { padding: 64px 0; }
    .mtb-head { margin-bottom: 44px; }
    .mtb-head__title { font-size: 30px; }
    .mtb-logo__img { height: 46px; }
    .mtb-pagebanner { min-height: 320px; }
    .mtb-pagebanner__inner { padding: 64px 24px; }
    .mtb-pagebanner__title { font-size: 34px; letter-spacing: 3px; }
    .mtb-pagebanner::after { font-size: 90px; }
}
@media (max-width: 576px) {
    .mtb-container { padding: 0 16px; }
    .mtb-topbar__left .mtb-topbar__item:first-child { display: none; }
    .mtb-footer__grid { grid-template-columns: 1fr; gap: 34px; }
    .mtb-footer__main { padding: 52px 0 40px; }
    .mtb-footer__bottom-inner { justify-content: center; text-align: center; }
    .mtb-logo__name { font-size: 18px; }
    .mtb-logo__en { font-size: 9px; letter-spacing: 2px; }
    .mtb-head__title { font-size: 25px; }
    .mtb-pagebanner { min-height: 250px; }
    .mtb-pagebanner__inner { padding: 52px 16px; }
    .mtb-pagebanner__en { font-size: 12px; letter-spacing: 5px; margin-bottom: 12px; }
    .mtb-pagebanner__title { font-size: 26px; letter-spacing: 2px; }
    .mtb-pagebanner__bar { margin-top: 18px; }
    .mtb-pagebanner__desc { margin-top: 16px; font-size: 13px; line-height: 1.8; }
    .mtb-pagebanner::after, .mtb-pagebanner::before { display: none; }
    .mtb-crumb { font-size: 13px; }
}