/* ===== 全局重置 ===== */
    * { margin: 0; padding: 0; box-sizing: border-box; }

    body {
        font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
        color: #333;
        line-height: 1.6;
        background: #fff;
    }

    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }

    .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

    /* ===== 导航栏（透明+滚动变实） ===== */
    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        padding: 20px 0;
        transition: all 0.4s ease;
        background: transparent;
    }

    .navbar.scrolled {
        padding: 8px 0;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }

    .navbar .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .logo-text {
        font-size: 24px;
        font-weight: 700;
        color: #fff;
        letter-spacing: 1px;
    }

    .logo-text span {
        background: linear-gradient(135deg, #60a5fa, #a78bfa);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .navbar.scrolled .logo-text { color: #fff; }

    .nav-menu { display: flex; gap: 4px; align-items: center; }

    .nav-menu > li > a {
        display: block;
        padding: 8px 18px;
        font-size: 15px;
        font-weight: 500;
        color: rgba(255,255,255,0.8);
        border-radius: 6px;
        transition: all 0.3s;
        position: relative;
    }

    .nav-menu > li > a::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%) scaleX(0);
        width: 60%;
        height: 2px;
        background: #60a5fa;
        transition: transform 0.3s;
    }

    .nav-menu > li > a:hover::after,
    .nav-menu > li > a.active::after { transform: translateX(-50%) scaleX(1); }

    .nav-menu > li > a:hover,
    .nav-menu > li > a.active { color: #fff; }

    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(10px);
        min-width: 180px;
        border-radius: 8px;
        padding: 8px 0;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: all 0.3s;
        z-index: 999;
        border: 1px solid rgba(255,255,255,0.08);
    }

    .nav-menu > li { position: relative; }
    .nav-menu > li:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .dropdown-menu li a {
        display: block;
        padding: 10px 20px;
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        transition: all 0.3s;
    }

    .dropdown-menu li a:hover {
        color: #fff;
        padding-left: 28px;
        background: rgba(96, 165, 250, 0.1);
    }

    .nav-cta a {
        display: inline-block;
        padding: 8px 24px;
        background: linear-gradient(135deg, #2563eb, #7c3aed);
        color: #fff;
        border-radius: 50px;
        font-size: 14px;
        font-weight: 600;
        transition: all 0.3s;
        margin-left: 12px;
    }

    .nav-cta a:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
    }

    .menu-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 10px;
        margin: -5px; /* 视觉尺寸不变，但可点区域 ≥44px */
    }

    .menu-toggle span {
        display: block;
        width: 28px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: all 0.3s;
    }

    /* ===== 通用标题 ===== */
    .section-title {
        text-align: center;
        margin-bottom: 60px;
    }

    .section-title .subtitle {
        display: inline-block;
        padding: 4px 16px;
        background: rgba(37, 99, 235, 0.08);
        color: #2563eb;
        font-size: 13px;
        font-weight: 600;
        border-radius: 50px;
        margin-bottom: 12px;
        letter-spacing: 2px;
    }

    .section-title h2 {
        font-size: 36px;
        font-weight: 700;
        color: #0f172a;
        margin-bottom: 16px;
    }

    .section-title p {
        font-size: 16px;
        color: #888;
        max-width: 560px;
        margin: 0 auto;
        line-height: 1.7;
    }

    /* ===== 页面横幅（内页） ===== */
    .page-banner {
        position: relative;
        height: 400px;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        margin-top: 0;
        padding-top: 80px;
    }

    .page-banner::before {
        content: '';
        position: absolute;
        top: 0; left: 0; right: 0; bottom: 0;
        background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    }

    .page-banner::after {
        content: '';
        position: absolute;
        top: 0; left: 0; right: 0; bottom: 0;
        background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        opacity: 0.5;
    }

    .page-banner-content {
        position: relative;
        z-index: 2;
        text-align: center;
        color: #fff;
    }

    .page-banner-content h1 {
        font-size: 42px;
        font-weight: 700;
        margin-bottom: 12px;
    }

    .page-banner-content .breadcrumb-nav {
        font-size: 14px;
        color: rgba(255,255,255,0.6);
    }

    .page-banner-content .breadcrumb-nav a { color: #60a5fa; }
    .page-banner-content .breadcrumb-nav span { margin: 0 8px; color: rgba(255,255,255,0.3); }

    /* ===== 页脚（简约社交风格） ===== */
    .footer {
        background: #0f172a;
        color: rgba(255, 255, 255, 0.6);
        padding: 60px 0 0;
    }

    .footer-main {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 60px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-brand .logo-text { font-size: 22px; display: inline-block; margin-bottom: 16px; }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.9;
        margin-bottom: 20px;
        max-width: 360px;
    }

    .footer-social { display: flex; gap: 12px; }

    .footer-social a {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        transition: all 0.3s;
        color: rgba(255,255,255,0.5);
    }

    .footer-social a:hover {
        background: linear-gradient(135deg, #2563eb, #7c3aed);
        color: #fff;
        transform: translateY(-3px);
    }

    .footer-col h4 {
        color: #fff;
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 20px;
    }

    .footer-col ul li { margin-bottom: 12px; }

    .footer-col ul li a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.5);
        transition: all 0.3s;
    }

    .footer-col ul li a:hover { color: #60a5fa; padding-left: 4px; }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.3);
    }

    .footer-bottom a { color: rgba(255,255,255,0.4); }

    /* ===== 漂浮按钮 ===== */
    .float-contact {
        position: fixed;
        right: 20px;
        bottom: 120px;
        z-index: 999;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .float-item {
        position: relative;
        width: 48px;
        height: 48px;
        background: linear-gradient(135deg, #2563eb, #7c3aed);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        box-shadow: 0 4px 15px rgba(37,99,235,0.35);
        transition: all 0.3s;
        text-decoration: none;
        color: #fff;
    }

    .float-item .float-icon { font-size: 20px; line-height: 1; color: #fff; }
    .float-item:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(37,99,235,0.4); }

    .float-backtop { background: rgba(15,23,42,0.5); box-shadow: none; }
    .float-backtop:hover { background: #0f172a; }

    .float-item .float-popup {
        display: none;
        position: absolute;
        right: 58px;
        top: 50%;
        transform: translateY(-50%);
        background: #fff;
        border-radius: 12px;
        padding: 16px;
        box-shadow: 0 8px 30px rgba(0,0,0,0.15);
        min-width: 150px;
        z-index: 1001;
    }

    .float-item .float-popup .popup-qr { text-align: center; }
    .float-item .float-popup .popup-qr img {
        width: 120px;
        height: 120px;
        display: block;
        margin: 0 auto 8px;
        border-radius: 6px;
    }
    .float-item .float-popup .popup-qr span { font-size: 12px; color: #888; }

    /* ===== 响应式 ===== */
    @media (max-width: 992px) {
        .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; }
        .page-banner { height: 320px; }
        .page-banner-content h1 { font-size: 32px; }
    }

    @media (max-width: 768px) {
        .menu-toggle { display: flex; }

        .nav-menu {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: rgba(15, 23, 42, 0.98);
            flex-direction: column;
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s, padding 0.3s;
        }

        .nav-menu.active {
            max-height: 500px;
            padding: 20px;
        }

        .nav-menu > li > a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.06); text-align: center; }

        .dropdown-menu {
            position: static;
            background: transparent;
            backdrop-filter: none;
            border: none;
            padding: 0;
            text-align: center;
            opacity: 1;
            visibility: visible;
            transform: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s;
        }

        .nav-menu > li:hover .dropdown-menu { max-height: 300px; }
        .nav-cta { margin-top: 12px; width: 100%; }
        .nav-cta a { margin-left: 0; display: block; text-align: center; padding: 12px 0; }

        .footer-main { grid-template-columns: 1fr; gap: 30px; }
        .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        .page-banner { height: 280px; padding-top: 70px; }
        .page-banner-content h1 { font-size: 26px; }

        /* 移动端点按区域 ≥44px */
        .dropdown-menu li a { padding: 12px 20px; }
        .footer-col ul li { margin-bottom: 0; }
        .footer-col ul li a { display: inline-block; padding: 11px 0; }
    }
    /* 手机端额外兼容修复 */
    @media (max-width: 768px) {
        .nav-menu > li > a[href*="#"] { cursor: pointer; }
        .dropdown-menu.open { max-height: 300px !important; }
        .nav-menu .dropdown-menu { max-height: 0 !important; overflow: hidden !important; }
        .nav-menu .dropdown-menu.open { max-height: 300px !important; }
    }
    @media (max-width: 480px) {
        .hero-content h1 { font-size: 26px !important; }
        .hero-content .hero-badge { font-size: 11px; padding: 4px 14px; }
        .hero-stats { gap: 16px !important; }
        .hero-stat .num { font-size: 28px !important; }
        .section-title h2 { font-size: 28px !important; }
        .service-grid { grid-template-columns: 1fr !important; }
        .svc-card { padding: 28px 20px !important; }
        .partners-grid { grid-template-columns: repeat(2, 1fr) !important; }
        .contact-form-wrap { padding: 24px !important; }
        .news-grid { grid-template-columns: 1fr !important; }
        .float-contact { right: 10px !important; left: auto !important; bottom: 80px !important; }
        .float-item { width: 44px !important; height: 44px !important; }
        .about-showcase { padding: 60px 0 !important; height: auto !important; }
        .as-card { padding: 16px !important; }
        .as-card .as-num { font-size: 26px !important; }
        .insights-grid { grid-template-columns: 1fr !important; }
        .case-card { height: 200px !important; }
    }