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

    body {
        font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
        color: var(--text);
        line-height: 1.6;
        background: var(--bg-body, var(--bg-light));
    }

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

    ul {
        list-style: none;
    }

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

    /* ===== 顶部工具栏 ===== */
    .top-bar {
        background: var(--topbar-bg);
        color: var(--topbar-text);
        font-size: 13px;
        padding: 8px 0;
    }

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

    .top-bar a {
        color: var(--topbar-text);
        margin-left: 20px;
        transition: color var(--transition);
    }

    .top-bar a:hover {
        color: var(--primary);
    }

    /* ===== 导航栏 ===== */
    .navbar {
        background: var(--navbar-bg);
        box-shadow: var(--navbar-shadow);
        position: sticky;
        top: 0;
        z-index: 1000;
        transition: all var(--transition);
        backdrop-filter: var(--navbar-blur, none);
        -webkit-backdrop-filter: var(--navbar-blur, none);
    }

    .navbar .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 80px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        color: inherit;
    }

    .logo img {
        height: 50px;
    }

    .logo-text {
        font-size: 26px;
        font-weight: 700;
        color: var(--navbar-text);
    }

    .logo-text span {
        color: var(--primary);
    }

    .nav-menu {
        display: flex;
        gap: 5px;
    }

    .nav-menu > li {
        position: relative;
    }

    .nav-menu > li > a {
        display: block;
        padding: 10px 20px;
        font-size: 16px;
        font-weight: 500;
        color: var(--navbar-text);
        border-radius: 4px;
        transition: all var(--transition);
    }

    .nav-menu > li > a:hover,
    .nav-menu > li > a.active {
        background: var(--primary);
        color: var(--bg-white);
    }

    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--bg-white);
        min-width: 180px;
        box-shadow: 0 8px 25px var(--dark-10);
        border-radius: 6px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: all var(--transition);
        z-index: 999;
    }

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

    .dropdown-menu li a {
        display: block;
        padding: 12px 20px;
        font-size: 14px;
        color: var(--text-secondary);
        border-bottom: 1px solid var(--border-lighter);
        transition: all var(--transition);
    }

    .dropdown-menu li a:hover {
        background: var(--primary);
        color: var(--bg-white);
        padding-left: 28px;
    }

    .dropdown-menu li:last-child a {
        border-bottom: none;
    }

    .menu-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 5px;
    }

    .menu-toggle span {
        display: block;
        width: 28px;
        height: 3px;
        background: var(--navbar-text);
        border-radius: 3px;
        transition: all var(--transition);
    }

    /* ===== 通用标题（页面内容共用） ===== */
    .section-title {
        text-align: center;
        margin-bottom: 50px;
    }

    .section-title h2 {
        font-size: 36px;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 15px;
        position: relative;
        display: inline-block;
    }

    .section-title h2::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background: var(--primary);
        margin: 12px auto 0;
        border-radius: 2px;
    }

    .section-title p {
        font-size: 16px;
        color: var(--text-muted);
        max-width: 600px;
        margin: 0 auto;
    }

    /* ===== 页面横幅（内页共用） ===== */
    .page-banner {
        position: relative;
        height: 350px;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }

    .page-banner img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
        top: 0;
        left: 0;
    }

    .page-banner::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: var(--overlay);
    }

    .page-banner-content {
        position: relative;
        z-index: 2;
        text-align: center;
        color: var(--bg-white);
    }

    .page-banner-content h1 {
        font-size: 42px;
        font-weight: 700;
        margin-bottom: 15px;
    }

    .page-banner-content p {
        font-size: 18px;
        opacity: 0.85;
    }

    /* ===== 面包屑导航（内页共用） ===== */
    .breadcrumb {
        background: var(--bg-hover);
        padding: 14px 0;
        font-size: 14px;
        color: var(--text-muted);
    }

    .breadcrumb a {
        color: var(--primary);
    }

    .breadcrumb a:hover {
        color: var(--primary-dark);
    }

    .breadcrumb span {
        margin: 0 8px;
        color: var(--text-lightest);
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--footer-bg, var(--dark));
        color: var(--footer-text);
        padding: 60px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid var(--footer-border);
    }

    .footer-col h4 {
        color: var(--bg-white);
        font-size: 18px;
        margin-bottom: 20px;
        position: relative;
        padding-bottom: 12px;
    }

    .footer-col h4::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 40px;
        height: 3px;
        background: var(--primary);
    }

    .footer-col p {
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 15px;
    }

    .footer-col ul li {
        margin-bottom: 10px;
    }

    .footer-col ul li a {
        font-size: 14px;
        color: var(--footer-link);
        transition: all var(--transition);
    }

    .footer-col ul li a:hover {
        color: var(--footer-link-hover);
        padding-left: 5px;
    }

    .footer-bottom {
        text-align: center;
        padding: 20px 0;
        font-size: 14px;
        color: var(--footer-bottom-text);
    }

    /* ===== 响应式 - 头部 & 底部 ===== */
    @media (max-width: 992px) {
        .footer-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .page-banner {
            height: 280px;
        }

        .page-banner-content h1 {
            font-size: 32px;
        }
    }

    @media (max-width: 768px) {
        .top-bar {
            font-size: 11px;
        }
        .top-bar .container {
            flex-direction: column;
            gap: 4px;
            text-align: center;
        }
        .top-bar a {
            margin-left: 10px;
        }

        .menu-toggle {
            display: flex;
        }

        .nav-menu {
            position: absolute;
            top: 80px;
            left: 0;
            width: 100%;
            background: var(--navbar-bg);
            flex-direction: column;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s;
        }

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

        .nav-menu > li > a {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-lighter);
        }

        .dropdown-menu {
            position: static;
            box-shadow: none;
            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;
        }

        .footer-grid {
            grid-template-columns: 1fr;
        }

        .page-banner {
            height: 220px;
        }

        .page-banner-content h1 {
            font-size: 26px;
        }

        .page-banner-content p {
            font-size: 14px;
        }
    }