:root {
    --ink: #17181b;
    --text: #2f3440;
    --muted: #687281;
    --line: #e7ebf2;
    --soft: #f5f8fc;
    --blue: #0071ef;
    --cyan: #10b7ce;
    --green: #24b36b;
    --dark: #17181b;
    --shadow: 0 18px 42px rgba(21, 35, 56, .1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--text);
    background: #fff;
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
    letter-spacing: 0;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }

img { display: block; max-width: 100%; }

button { font: inherit; }

.page { min-width: 0; overflow: hidden; }

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid rgba(231, 235, 242, .82);
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(16px);
}

.nav {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-size: 20px;
    font-weight: 700;
    white-space: nowrap;
}

.brand-mark { position: relative; width: 34px; height: 24px; }

.brand-logo {
    display: block;
    height: 26px;
    width: auto;
    max-width: 34px;
    object-fit: contain;
}

.brand-mark::before,
.brand-mark::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 10px;
    border-radius: 3px;
    transform: skewX(-32deg);
}

.brand-mark::before { left: 0; top: 4px; background: var(--blue); }

.brand-mark::after { right: 0; bottom: 4px; background: var(--cyan); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 26px;
    margin-left: auto;
    color: #4c5563;
    font-size: 14px;
}

.nav-links a { transition: color .2s ease; }

.nav-links a:hover { color: var(--blue); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.phone { color: var(--ink); font-weight: 700; white-space: nowrap; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 20px;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(0, 113, 239, .18);
}

.btn-primary { color: #fff; background: var(--blue); }

.btn-light {
    color: var(--blue);
    background: #fff;
    border-color: rgba(0, 113, 239, .18);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fff;
    color: var(--ink);
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 4px auto;
    background: currentColor;
    border-radius: 999px;
}

.hero {
    position: relative;
    min-height: 640px;
    color: var(--ink);
    background: #eef7ff;
}

.hero-slider { position: absolute; inset: 0; }

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    background-size: cover;
    background-position: center;
    transition: opacity .6s ease;
}

.hero-slide.active { opacity: 1; }

.hero-slide::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 255, 255, .92), rgba(255, 255, 255, .7) 44%, rgba(255, 255, 255, .18));
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    min-height: 640px;
    align-items: center;
    padding: 92px 0 64px;
}

.eyebrow {
    margin: 0 0 18px;
    color: var(--blue);
    font-size: 16px;
    line-height: 1.5;
    font-weight: 700;
}

.eyebrow:empty { display: none; }

.hero h1 {
    max-width: 640px;
    margin: 0;
    color: var(--ink);
    font-size: 56px;
    line-height: 1.08;
    font-weight: 800;
}

.hero-copy {
    max-width: 560px;
    margin: 22px 0 34px;
    color: #596273;
    font-size: 20px;
    line-height: 1.8;
    white-space: pre-line;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-tabs {
    position: absolute;
    left: 50%;
    bottom: 28px;
    z-index: 2;
    display: grid;
    width: min(1180px, calc(100% - 40px));
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    transform: translateX(-50%);
}

.hero-tab {
    min-height: 64px;
    padding: 12px 14px;
    border: 1px solid rgba(0, 113, 239, .12);
    border-radius: 6px;
    color: #5f6b7a;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(12px);
    text-align: left;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(24, 55, 95, .08);
}

.hero-tab strong {
    display: block;
    margin-bottom: 4px;
    color: var(--ink);
    font-size: 15px;
}

.hero-tab span { display: block; font-size: 12px; line-height: 1.4; }

.hero-tab.active {
    color: #fff;
    border-color: var(--blue);
    background: var(--blue);
}

.hero-tab.active strong { color: #fff; }

section { padding: 88px 0; }

.section-head {
    max-width: 720px;
    margin: 0 auto 42px;
    text-align: center;
}

.section-head.align-left { margin-left: 0; text-align: left; }

.section-kicker {
    margin: 0 0 10px;
    color: var(--blue);
    font-size: 14px;
    font-weight: 700;
}

h2 {
    margin: 0;
    color: var(--ink);
    font-size: 32px;
    line-height: 1.35;
    font-weight: 700;
}

.section-desc {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.8;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.product-card {
    min-height: 214px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.product-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 113, 239, .28);
    box-shadow: var(--shadow);
}

.product-icon {
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 8px;
    background: #eef6ff;
}

.product-icon img { width: 26px; height: 26px; object-fit: contain; }

.product-card h3,
.service-card h3,
.wos-card h3 {
    margin: 0 0 10px;
    color: var(--ink);
    font-size: 20px;
    line-height: 1.35;
}

.product-card strong {
    display: block;
    margin-bottom: 12px;
    color: #303845;
    font-size: 14px;
    line-height: 1.5;
}

.product-card p,
.service-card p,
.wos-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
}

.industry { color: #fff; background: #101a2b; }

.industry h2,
.industry .section-desc { color: #fff; }

.industry .section-desc { opacity: .72; }

.industry-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 26px;
    align-items: stretch;
}

.industry-tabs { display: grid; gap: 8px; }

.industry-tab {
    min-height: 48px;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 6px;
    color: rgba(255, 255, 255, .68);
    background: rgba(255, 255, 255, .06);
    text-align: left;
    cursor: pointer;
}

.industry-tab.active { color: #fff; background: var(--blue); }

.industry-panel {
    display: none;
    min-height: 480px;
    border-radius: 8px;
    overflow: hidden;
    background: #16243a;
}

.industry-panel.active {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
}

.industry-copy { padding: 54px; }

.industry-copy h3 {
    margin: 0 0 18px;
    color: #fff;
    font-size: 30px;
    line-height: 1.35;
}

.industry-copy p {
    margin: 0 0 26px;
    color: rgba(255, 255, 255, .74);
    font-size: 16px;
    line-height: 1.9;
}

.industry-points {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.industry-points li {
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 6px;
    color: rgba(255, 255, 255, .84);
    background: rgba(255, 255, 255, .06);
    font-size: 14px;
}

.industry-visual {
    min-height: 100%;
    background-size: cover;
    background-position: center;
}

.services { background: var(--soft); }

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.service-card {
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 12px 30px rgba(21, 35, 56, .06);
}

.service-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    margin-bottom: 22px;
    border-radius: 8px;
    background: #eef6ff;
}

.service-index img { width: 30px; height: 30px; object-fit: contain; }

.map-section { position: relative; color: #fff; background: #0b2342; }

.map-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(90deg, rgba(5, 18, 36, .84), rgba(5, 18, 36, .58)), url("DituBg.ab8ee314.png");
    background-size: cover;
    background-position: center;
}

.map-content {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(300px, 1.05fr);
    gap: 48px;
    align-items: center;
}

.map-content h2,
.map-content .section-desc { color: #fff; }

.city-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.city {
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 6px;
    background: rgba(255, 255, 255, .08);
    color: rgba(255, 255, 255, .9);
    text-align: center;
}

.wos-layout {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: center;
}

.wos-panel {
    min-height: 420px;
    border-radius: 8px;
    background-image: linear-gradient(135deg, rgba(0, 113, 239, .9), rgba(16, 183, 206, .72)), url("L107.f3ec0f7c.png");
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow);
}

.wos-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.wos-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.certs { background: #f3f6fb; }

.cert-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
}

.cert {
    min-height: 150px;
    padding: 20px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    text-align: center;
}

.cert-badge {
    display: inline-flex;
    width: 64px;
    height: 64px;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    border-radius: 50%;
    background: #eef6ff;
}

.cert-badge img { width: 42px; height: 42px; object-fit: contain; }

.cert p {
    margin: 0;
    color: #303845;
    font-size: 14px;
    line-height: 1.6;
}

.cta {
    position: relative;
    overflow: hidden;
    padding: 72px 0;
    color: #fff;
    background: var(--blue);
}

.cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(90deg, rgba(0, 113, 239, .95), rgba(0, 113, 239, .82)), url("ZhuceBg.d0ce1f1c.png");
    background-size: cover;
    background-position: center;
}

.cta-inner { position: relative; text-align: center; }

.cta h2 { color: #fff; font-size: 28px; }

.cta .btn { margin-top: 26px; min-width: 150px; }

/* ---------- 多栏 Footer ---------- */
.site-footer {
    color: rgba(255, 255, 255, .72);
    background: #17181b;
    font-size: 14px;
}

.footer-main {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    padding: 56px 0 44px;
}

.footer-brand { flex: 1 1 260px; max-width: 340px; }

.footer-brand .brand { color: #fff; }

.footer-about {
    margin: 16px 0 20px;
    color: rgba(255, 255, 255, .58);
    font-size: 14px;
    line-height: 1.9;
}

.footer-hotline { margin: 0; color: rgba(255, 255, 255, .58); font-size: 13px; }

.footer-hotline strong {
    display: block;
    margin-top: 6px;
    color: #fff;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: .5px;
}

.footer-col { flex: 1 1 120px; min-width: 110px; }

.footer-col h4 {
    margin: 4px 0 18px;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
}

.footer-col ul {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-col a {
    color: rgba(255, 255, 255, .58);
    transition: color .2s ease;
}

.footer-col a:hover { color: #fff; }

.footer-contact { flex: 1 1 180px; min-width: 160px; }

.footer-contact p {
    margin: 0 0 12px;
    color: rgba(255, 255, 255, .58);
    line-height: 1.7;
}

.footer-qr { display: flex; gap: 18px; }

.footer-qr figure { margin: 0; text-align: center; }

.footer-qr img {
    width: 96px;
    height: 96px;
    padding: 4px;
    border-radius: 6px;
    background: #fff;
}

.footer-qr figcaption {
    margin-top: 8px;
    color: rgba(255, 255, 255, .55);
    font-size: 12px;
}

.footer-bottom {
    padding: 18px 0;
    border-top: 1px solid rgba(255, 255, 255, .1);
    color: rgba(255, 255, 255, .45);
    text-align: center;
    font-size: 13px;
    line-height: 1.9;
}

.footer-bottom p { margin: 0; }

.footer-bottom a { color: inherit; transition: color .2s ease; }

.footer-bottom a:hover { color: #fff; }

.float-contact {
    position: fixed;
    right: 22px;
    bottom: 28px;
    z-index: 25;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

.float-card {
    position: relative;
    display: flex;
    width: 116px;
    min-height: 176px;
    flex-direction: column;
    align-items: center;
    padding: 22px 10px 18px;
    border: 0;
    border-radius: 8px;
    color: #fff;
    background: var(--blue);
    box-shadow: 0 12px 28px rgba(0, 113, 239, .28);
    text-align: center;
    cursor: pointer;
}

.float-card::before {
    content: "";
    position: absolute;
    top: 18px;
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: #fff;
}

.float-avatar {
    position: relative;
    z-index: 1;
    width: 68px;
    height: 68px;
    overflow: hidden;
    border-radius: 50%;
    background: #fff;
}

.float-avatar img { width: 100%; height: 100%; object-fit: cover; }

.float-label {
    display: block;
    margin-top: 22px;
    font-size: 12px;
    line-height: 1.4;
    opacity: .95;
}

.float-phone {
    display: block;
    margin-top: 6px;
    font-size: 15px;
    line-height: 1.3;
    font-weight: 800;
}

.float-close {
    position: absolute;
    top: -12px;
    right: -4px;
    width: 24px;
    height: 24px;
    padding: 0;
    border: 0;
    color: var(--blue);
    background: transparent;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
}

.float-contact .back-top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(0, 113, 239, .18);
    border-radius: 8px;
    color: var(--blue);
    background: #fff;
    font-size: 22px;
    line-height: 1;
    box-shadow: 0 10px 24px rgba(21, 35, 56, .1);
}

.mobile-contact { display: none; }

@media (max-width: 1100px) {
    .product-grid,
    .cert-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

    .hero-tabs { grid-template-columns: repeat(3, 1fr); }

    .industry-panel.active,
    .map-content,
    .wos-layout { grid-template-columns: 1fr; }

    .industry-visual { min-height: 260px; }
}

@media (max-width: 820px) {
    .container { width: min(100% - 28px, 1180px); }

    .nav { height: 64px; }

    .menu-toggle { display: inline-block; }

    .nav-links {
        position: fixed;
        left: 14px;
        right: 14px;
        top: 74px;
        display: none;
        padding: 14px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: var(--shadow);
    }

    body.menu-open .nav-links { display: grid; gap: 4px; }

    .nav-links a { padding: 12px 10px; }

    .nav-actions .phone { display: none; }

    .nav-actions .btn { display: none; }

    .page { padding-bottom: 70px; }

    .mobile-contact {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 40;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
        border-top: 1px solid rgba(231, 235, 242, .9);
        background: rgba(255, 255, 255, .96);
        box-shadow: 0 -12px 28px rgba(21, 35, 56, .1);
        backdrop-filter: blur(14px);
    }

    .mobile-contact a,
    .mobile-contact button {
        display: inline-flex;
        min-height: 46px;
        align-items: center;
        justify-content: center;
        border-radius: 6px;
        font-size: 15px;
        font-weight: 700;
    }

    .mobile-contact a {
        color: var(--blue);
        border: 1px solid rgba(0, 113, 239, .22);
        background: #fff;
    }

    .mobile-contact button {
        color: #fff;
        border: 1px solid var(--blue);
        background: var(--blue);
    }

    .hero,
    .hero-content { min-height: 620px; }

    .hero-content { padding: 72px 0 150px; }

    .eyebrow { font-size: 14px; }

    .hero h1 { font-size: 38px; line-height: 1.16; }

    .hero-copy { font-size: 16px; line-height: 1.75; }

    .hero-tabs { grid-template-columns: 1fr 1fr; bottom: 16px; }

    .hero-tab { min-height: 58px; }

    section { padding: 64px 0; }

    h2 { font-size: 26px; }

    .product-grid,
    .service-grid,
    .wos-grid,
    .cert-grid,
    .industry-layout,
    .city-grid { grid-template-columns: 1fr; }

    .industry-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .industry-tab { padding: 0 12px; }

    .industry-copy { padding: 28px; }

    .industry-copy h3 { font-size: 24px; }

    .industry-points { grid-template-columns: 1fr; }

    .wos-panel { min-height: 260px; }

    .footer-main { gap: 28px; padding: 44px 0 32px; }

    .footer-brand { max-width: none; flex-basis: 100%; }

    .footer-col { flex: 1 1 40%; }

    .footer-contact { flex-basis: 100%; }

    .float-contact {
        right: 12px;
        bottom: 86px;
        display: flex;
    }

    .float-card {
        width: 104px;
        min-height: 150px;
        padding: 18px 8px 14px;
    }

    .float-card::before {
        top: 14px;
        width: 66px;
        height: 66px;
    }

    .float-avatar { width: 58px; height: 58px; }

    .float-label { margin-top: 18px; font-size: 12px; }

    .float-phone { font-size: 13px; }

    .float-contact .back-top { display: none; }
}

@media (max-width: 520px) {
    .brand { font-size: 18px; }

    .hero,
    .hero-content { min-height: 690px; }

    .hero h1 { font-size: 32px; }

    .hero-tabs { grid-template-columns: 1fr; }

    .hero-tab:nth-child(n+4) { display: none; }

    .hero-actions .btn { width: 100%; }

    .product-card,
    .service-card,
    .wos-card { padding: 22px; }

    .section-head { margin-bottom: 30px; }

    .footer-col { flex: 1 1 100%; }

    .float-contact {
        right: 10px;
        bottom: 84px;
        display: flex;
    }

    .float-card { width: 98px; min-height: 144px; }

    .float-close { top: -10px; right: -6px; }
}