*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 14px;
    line-height: 1.7;
    color: #333;
    background: #fff;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
button { border: 0; background: none; padding: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.25; font-weight: 600; }

:root {
    --blue: #0c75ba;
    --blue-dark: #0864a0;
    --blue-light: #edf6fd;
    --gray-1: #f5f5f5;
    --gray-2: #e5e5e5;
    --gray-3: #dcdcdc;
    --text: #333;
    --muted: #777;
    --dark: #333;
    --footer: #333;
    --shadow: 0 2px 10px rgba(0,0,0,.08);
}

.container {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 56px 0;
}

.topbar {
    background: #565656;
    color: rgba(255,255,255,.9);
    font-size: 12px;
}
.topbar-inner {
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.topbar-tip {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.topbar-tip i { font-size: 14px; }
.topbar-links {
    display: flex;
    align-items: center;
}
.topbar-links a {
    position: relative;
    padding: 0 16px;
    border-left: 1px solid rgba(255,255,255,.3);
}
.topbar-links a:last-child {
    border-right: 1px solid rgba(255,255,255,.3);
}
.topbar-wechat-qr {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    z-index: 120;
    width: 142px;
    padding: 8px;
    background: #fff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 10px 26px rgba(0,0,0,.18);
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 8px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
    pointer-events: none;
}
.topbar-wechat-qr::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 50%;
    width: 12px;
    height: 12px;
    background: #fff;
    border-left: 1px solid #e5e5e5;
    border-top: 1px solid #e5e5e5;
    transform: translateX(-50%) rotate(45deg);
}
.topbar-wechat-qr img {
    position: relative;
    z-index: 1;
    display: block;
    width: 124px;
    height: 124px;
    object-fit: cover;
}
.topbar-wechat:hover .topbar-wechat-qr,
.topbar-wechat:focus .topbar-wechat-qr {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
    pointer-events: auto;
}

.site-header {
    background: #fff;
}
.site-brandbar {
    height: 112px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}
.brand-logo img {
    width: min(738px, 100%);
    height: auto;
    display: block;
}
.brand-mark {
    width: 124px;
    height: 76px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 5px solid #1c75bc;
    border-radius: 50%;
    color: #1c75bc;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 42px;
    font-weight: 800;
    font-style: italic;
    line-height: 1;
    letter-spacing: -2px;
}
.brand-name {
    display: inline-flex;
    flex-direction: column;
    margin-left: 16px;
    color: #111;
    white-space: nowrap;
}
.brand-name strong {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1.15;
}
.brand-name em {
    margin-top: 4px;
    font-family: Arial, Helvetica, sans-serif;
    font-style: normal;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1;
}
.brand-certs {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 0;
}
.cert-badge {
    height: 70px;
    min-width: 88px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.1;
}
.cert-badge strong {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 34px;
    font-weight: 800;
    line-height: 1;
}
.cert-badge em {
    font-style: normal;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 11px;
    font-weight: 700;
    line-height: 1.15;
}
.cert-cma {
    color: #e22d33;
    border: 4px solid #e22d33;
    border-radius: 50%;
    transform: skew(-5deg);
}
.cert-cma strong,
.cert-cma em {
    transform: skew(5deg);
}
.cert-ilac {
    width: 76px;
    min-width: 76px;
    border: 2px solid #3d89bb;
    border-radius: 50%;
    color: #2f77a9;
}
.cert-ilac strong {
    font-size: 15px;
}
.cert-cnas {
    min-width: 136px;
    flex-direction: row;
    gap: 6px;
    color: #0b3f93;
}
.cert-cnas strong {
    font-size: 37px;
    font-style: italic;
}
.cert-cnas em {
    text-align: left;
    font-size: 11px;
}
.brand-phone {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    color: #1e5a9b;
}
.brand-phone img {
    width: 39px;
    height: 31px;
    object-fit: contain;
}
.brand-phone span {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.1;
}
.brand-phone em {
    font-style: normal;
    font-size: 14px;
}
.brand-phone strong {
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
    font-size: 30px;
    font-weight: 500;
    letter-spacing: 1px;
}
.mobile-header-actions {
    display: none;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}
.mobile-lang {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    color: #777;
    font-size: 22px;
}
.mobile-nav-toggle {
    display: inline-flex;
    width: 34px;
    height: 30px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.mobile-nav-toggle span {
    display: block;
    width: 24px;
    height: 3px;
    border-radius: 3px;
    background: var(--blue);
    transition: transform .18s ease, opacity .18s ease;
}
.site-header.is-nav-open .mobile-nav-toggle span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.site-header.is-nav-open .mobile-nav-toggle span:nth-child(2) {
    opacity: 0;
}
.site-header.is-nav-open .mobile-nav-toggle span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.main-nav {
    background: var(--blue);
    position: relative;
    z-index: 50;
}
.main-nav-inner {
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}
.main-nav-list {
    display: flex;
    align-items: stretch;
    min-height: 54px;
}
.main-nav-list > li {
    position: relative;
}
.main-nav-list > li > a {
    min-width: 110px;
    height: 54px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 0 18px;
}
.main-nav-list > li:hover > a,
.main-nav-list > li > a.is-active {
    background: #0868aa;
}
.nav-home {
    min-width: 55px !important;
    font-size: 19px;
}
.nav-dropdown {
    position: absolute;
    left: 0;
    top: 54px;
    width: 280px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    padding: 10px 0;
    background: rgba(12, 92, 185, .9);
    box-shadow: 0 8px 18px rgba(0,0,0,.18);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.has-dropdown:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.nav-dropdown a {
    display: block;
    height: 46px;
    line-height: 46px;
    padding: 0 16px;
    color: #fff;
    font-size: 14px;
    white-space: nowrap;
}
.nav-dropdown a:hover {
    background: rgba(255,255,255,.12);
}

.section-title-wrap {
    position: relative;
    text-align: center;
    margin-bottom: 28px;
}
.section-title-wrap h2 {
    position: relative;
    display: inline-block;
    font-size: 30px;
    color: #333;
    font-weight: 500;
    z-index: 1;
}
.section-title-wrap i {
    display: block;
    width: 320px;
    height: 1px;
    margin: 16px auto 0;
    background: var(--gray-3);
    position: relative;
}
.section-title-wrap i::before,
.section-title-wrap i::after {
    content: "";
    position: absolute;
    top: -4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #4aa2f0;
}
.section-title-wrap i::before { left: 155px; }
.section-title-wrap i::after { left: 166px; }
.section-ghost {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 48px;
    font-weight: 800;
    color: rgba(0,0,0,.03);
    white-space: nowrap;
    letter-spacing: 1px;
    pointer-events: none;
    user-select: none;
}
.section-sub {
    display: inline-block;
    margin-left: 8px;
    padding: 4px 12px;
    border-radius: 999px;
    background: #6ba6e6;
    color: #fff;
    font-size: 12px;
    line-height: 1.4;
    vertical-align: middle;
}

.site-footer {
    background: #353535;
    color: #d7d7d7;
    padding: 18px 0 24px;
}
.footer-top {
    font-size: 13px;
}
.footer-links {
    text-align: center;
    padding: 6px 0 8px;
}
.footer-links a {
    display: inline-block;
    padding: 0 6px;
    color: #fff;
    white-space: nowrap;
}
.footer-summary {
    line-height: 1.8;
    color: #d0d0d0;
    text-align: center;
    margin-top: 12px;
}
.footer-line {
    height: 1px;
    background: rgba(255,255,255,.18);
    margin: 18px 0 14px;
}
.footer-bottom-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    font-size: 13px;
    color: #e0e0e0;
}
.footer-bottom-note {
    margin-top: 14px;
    color: #d0d0d0;
    line-height: 1.8;
}

@media (max-width: 1180px) {
    .main-nav-list > li > a { min-width: 84px; font-size: 14px; }
}

@media (max-width: 960px) {
    .site-brandbar { height: auto; padding: 18px 0; flex-wrap: wrap; justify-content: center; }
    .brand-phone { margin-left: 0; }
    .main-nav-list { flex-wrap: wrap; justify-content: flex-start; }
    .main-nav-list > li > a { min-width: 72px; padding: 0 14px; }
    .nav-dropdown { position: static; display: none; width: 100%; opacity: 1; visibility: visible; transform: none; box-shadow: none; }
    .has-dropdown:hover .nav-dropdown { display: grid; }
    .topbar-inner { flex-direction: column; align-items: flex-start; padding: 8px 0; }
    .topbar-tip { white-space: normal; }
    .footer-bottom-row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
    .container { width: min(100% - 20px, 1200px); }
    .section { padding: 42px 0; }
    .section-title-wrap h2 { font-size: 26px; }
    .section-ghost { font-size: 24px; }
    .site-brandbar { gap: 16px; }
    .brand-logo { width: 100%; justify-content: center; }
    .brand-logo img { max-width: 100%; }
    .brand-phone img { width: 34px; height: 27px; }
    .brand-phone em { font-size: 12px; }
    .brand-phone strong { font-size: 24px; }
    .main-nav-list > li > a { min-width: 64px; height: 46px; font-size: 13px; }
    .main-nav { overflow: auto; }
    .main-nav-inner { min-width: max-content; }
    .main-nav-list { min-width: max-content; }
}

@media (max-width: 768px) {
    body {
        padding-top: 62px;
    }
    .topbar {
        display: none;
    }
    .site-header {
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        width: 100%;
        background: #fff;
        z-index: 80;
        border-bottom: 1px solid #e9eef3;
        box-shadow: 0 1px 8px rgba(0,0,0,.06);
    }
    .site-brandbar {
        width: min(100% - 20px, 1200px);
        height: 62px;
        padding: 0;
        display: grid;
        grid-template-columns: minmax(0, 1fr) 40px;
        align-items: center;
        gap: 10px;
    }
    .brand-logo {
        width: auto;
        max-width: calc(100% - 96px);
        justify-content: flex-start;
        min-width: 0;
        overflow: hidden;
    }
    .brand-logo img {
        width: min(278px, calc(100vw - 78px));
        max-width: 100%;
        height: auto;
        max-height: 42px;
        object-fit: contain;
        object-position: left center;
    }
    .brand-phone {
        display: none;
    }
    .mobile-header-actions {
        display: inline-flex;
        width: 40px;
        z-index: 5;
        min-width: 42px;
        justify-content: flex-end;
    }
    .mobile-lang {
        display: none;
    }
    .mobile-nav-toggle {
        width: 40px;
        height: 40px;
        border-radius: 4px;
        background: #fff;
        border: 0;
    }
    .main-nav {
        display: none;
        overflow: hidden;
    }
    .site-header.is-nav-open .main-nav {
        display: block;
    }
    .site-header.is-nav-open {
        z-index: 300;
    }
    .main-nav .container {
        width: 100%;
        height: 100%;
    }
    .main-nav-inner {
        min-width: 0;
        min-height: 0;
        height: 100%;
        display: block;
    }
    .main-nav-list {
        width: 100%;
        min-width: 0;
        min-height: 0;
        height: calc(100vh - 62px);
        display: block;
        position: relative;
        overflow-y: auto;
        overflow-x: hidden;
        background: var(--blue);
    }
    .site-header.is-nav-open .main-nav {
        position: fixed;
        left: 0;
        right: 0;
        top: 62px;
        bottom: 0;
        height: auto;
        box-shadow: 0 12px 24px rgba(0,0,0,.18);
    }
    .site-header.is-nav-open .main-nav-list {
        position: fixed;
        left: 0;
        top: 62px;
        bottom: 0;
        height: auto;
        max-height: none;
    }
    .site-header.is-subnav-open .main-nav-list {
        width: 40%;
    }
    .main-nav-list > li > a {
        width: 100%;
        height: 44px;
        min-width: 0;
        justify-content: flex-start;
        padding: 0 18px;
        border-top: 1px solid rgba(255,255,255,.12);
    }
    .main-nav-list > li > a.is-active,
    .main-nav-list > li.is-mobile-active > a {
        background: #0b82c8;
    }
    .nav-home {
        min-width: 0 !important;
    }
    .nav-dropdown {
        position: fixed;
        left: 40%;
        right: 0;
        top: 62px;
        bottom: 0;
        width: auto;
        display: none;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-content: start;
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        overflow-y: auto;
        background: #333;
    }
    .site-header.is-subnav-open .main-nav-list > li.is-mobile-active .nav-dropdown {
        display: grid;
    }
    .nav-dropdown a {
        height: 38px;
        line-height: 38px;
        padding: 0 18px;
        font-size: 13px;
        overflow: hidden;
        text-overflow: ellipsis;
        border-top: 1px solid rgba(255,255,255,.08);
    }
    .section {
        padding: 46px 0;
    }
    .section-title-wrap {
        margin-bottom: 22px;
    }
    .section-title-wrap h2 {
        font-size: 24px;
    }
    .section-title-wrap i {
        width: min(320px, 84vw);
        margin-top: 14px;
    }
    .section-title-wrap i::before {
        left: calc(50% - 11px);
    }
    .section-title-wrap i::after {
        left: calc(50% + 1px);
    }
    .section-ghost {
        top: -7px;
        max-width: 100%;
        overflow: hidden;
        font-size: 34px;
    }
}