/* 主内容布局 */
        .join-container {
            background: var(--white);
            border-radius: var(--radius-lg);
            margin: 48px 0;
            padding: 48px 52px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--slate-100);
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 28px;
            border-left: 5px solid var(--blue);
            padding-left: 20px;
        }
        .section-title i {
            font-size: 26px;
            color: var(--blue);
        }
        .section-title h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--slate-800);
        }
        .fee-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0 30px;
        }
        .fee-table th, .fee-table td {
            border: 1px solid var(--slate-200);
            padding: 14px 16px;
            text-align: left;
        }
        .fee-table th {
            background: var(--slate-50);
            font-weight: 700;
            color: var(--slate-800);
            width: 35%;
        }
        .fee-table td {
            color: var(--slate-600);
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin: 30px 0 25px;
        }
        .contact-card {
            background: var(--slate-50);
            border-radius: var(--radius-md);
            padding: 28px 24px;
        }
        .contact-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-card p {
            margin-bottom: 12px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-card i {
            width: 24px;
            color: var(--blue);
        }
        .bank-note {
            background: var(--blue-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin: 20px 0 30px;
            border-left: 4px solid var(--blue);
        }
        .bank-note p {
            font-size: 14px;
            margin-bottom: 6px;
        }
        .download-area {
            text-align: center;
            margin: 40px 0 20px;
            padding: 30px 20px;
            background: var(--slate-50);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--blue);
        }
        .btn-download {
            background: var(--blue);
            color: white;
            border: none;
            padding: 14px 36px;
            border-radius: 48px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .btn-download:hover {
            background: var(--blue-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(2,132,199,0.3);
        }
        .download-note {
            font-size: 13px;
            color: var(--slate-500);
        }
        footer {
            background: var(--slate-900);
            color: #94a3b8;
            padding: 50px 0 28px;
            margin-top: 60px;
        }
        .footer-cols {
            display: grid;
            grid-template-columns: 2.5fr 1fr 1fr;
            gap: 44px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            padding-bottom: 30px;
        }
        .copyright {
            text-align: center;
            font-size: 11px;
            margin-top: 22px;
        }
        @media (max-width: 860px) {
            .menu-toggle { display: flex; }
            .nav-list {
                position: fixed; top:0; right:0; width: 280px; height: 100vh;
                background: white; flex-direction: column; padding: 90px 24px;
                transform: translateX(100%); transition: transform 0.35s;
                z-index: 995;
            }
            body.nav-active .nav-list { transform: translateX(0); }
            body.nav-active .nav-overlay { opacity: 1; visibility: visible; }
            .dropdown-menu {
                position: static; opacity: 0; visibility: hidden; max-height: 0;
                overflow: hidden; transition: max-height 0.3s;
            }
            .dropdown-menu.show { opacity: 1; visibility: visible; max-height: 200px; margin: 6px 0; }
            .join-container { padding: 28px 20px; }
            .contact-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-cols { grid-template-columns: 1fr; text-align: center; }
        }
        @media (max-width: 640px) {
            .page-banner h1 { font-size: 28px; }
            .section-title h2 { font-size: 20px; }
            .fee-table th, .fee-table td { padding: 10px 12px; font-size: 14px; }
        }