/*** 关于我们 ***/

  * { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --gov-blue: #005BAC;
            --tech-blue: #00A0E9;
            --gov-dark: #0d1b3e;
            --white: #ffffff;
            --bg-light: #F5F7FA;
            --text-dark: #1a1a2e;
            --text-light: #6b7280;
            --border: #e5e7eb;
        }
        body { font-family: 'Noto Sans SC', -apple-system, sans-serif; background: #ffffff; color: var(--text-dark); }
        /* Top Nav */
        .top-nav {
            background: var(--gov-dark);
            height: 64px;
            display: flex;
            align-items: center;
            padding: 0 60px;
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1000;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            color: white;
            text-decoration: none;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--gov-blue), var(--tech-blue));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .nav-logo-text { display: flex; flex-direction: column; gap: 2px; }
        .nav-logo-top { font-size: 18px; font-weight: 700; color: #fff; letter-spacing: 2px; }
        .nav-logo-title { font-size: 14px; font-weight: 600; }
        .nav-logo-sub { font-size: 10px; opacity: 0.6; letter-spacing: 1px; }

        .nav-menu {
            display: flex;
            gap: 4px;
            margin-left: 60px;
        }

        .nav-menu a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            padding: 10px 18px;
            font-size: 14px;
            border-radius: 6px;
            transition: all 0.3s;
        }

        .nav-menu a:hover { background: rgba(255,255,255,0.1); color: white; }
        .nav-menu a.active { background: var(--gov-blue); color: white; }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown-toggle {
            display: flex;
            align-items: center;
            gap: 4px;
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            padding: 10px 18px;
            font-size: 14px;
            border-radius: 6px;
            transition: all 0.3s;
            cursor: pointer;
        }

        .nav-dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            border-radius: 8px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.15);
            min-width: 140px;
            padding: 8px 0;
            z-index: 100;
        }

        .nav-dropdown:hover .nav-dropdown-menu {
            display: block;
        }

        .nav-dropdown-menu a {
            display: block;
            padding: 10px 20px;
            color: var(--text-dark);
            font-size: 13px;
            white-space: nowrap;
        }

        .nav-dropdown-menu a:hover {
            background: var(--bg-light);
            color: var(--gov-blue);
        }

        .nav-right {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .lang-switch {
            display: flex;
            gap: 4px;
            background: rgba(255,255,255,0.1);
            padding: 4px;
            border-radius: 8px;
        }

        .lang-switch button {
            padding: 5px 10px;
            border: none;
            background: transparent;
            color: rgba(255,255,255,0.7);
            font-size: 12px;
            cursor: pointer;
            border-radius: 5px;
            transition: all 0.3s;
        }

        .lang-switch button:hover, .lang-switch button.active {
            background: var(--gov-blue);
            color: white;
        }

        .nav-auth a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            font-size: 13px;
        }

        .nav-auth .btn-login {
            padding: 7px 20px;
            background: var(--tech-blue);
            border-radius: 6px;
            color: white !important;
        }

        .main-wrapper { margin-top: 64px; }

        /* Page Banner */
        .page-banner {
            background: linear-gradient(135deg, #0a1f5c 0%, #1a3a8f 50%, #2b5aa0 100%);
            padding: 40px 60px;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .page-banner-content {
            position: relative;
            z-index: 1;
            max-width: 1200px;
            margin: 0 auto;
        }

        .page-banner h1 {
            font-size: 28px;
            font-weight: 700;
            color: white;
        }

        .page-banner p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-top: 8px;
        }

        /* Content Container */
        .content-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 60px;
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 32px;
        }

        /* Sidebar */
        .sidebar-menu {
            background: white;
            border-radius: 12px;
            padding: 16px;
            height: fit-content;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }

        .sidebar-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 8px;
            color: var(--text-dark);
            text-decoration: none;
            font-size: 13px;
            transition: all 0.2s;
            margin-bottom: 4px;
            border-left: 3px solid transparent;
        }

        .sidebar-item i {
            width: 18px;
            text-align: center;
            color: var(--text-light);
        }

        .sidebar-item:hover {
            background: var(--bg-light);
        }

        .sidebar-item.active {
            background: rgba(0,160,233,0.08);
            color: var(--gov-blue);
            border-left-color: var(--gov-blue);
            font-weight: 500;
        }

        .sidebar-item.active i {
            color: var(--gov-blue);
        }

        /* Main Content */
        .main-content {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        /* Vision Mission Cards */
        .vision-mission {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .vm-card {
            background: linear-gradient(135deg, var(--gov-blue), var(--tech-blue));
            border-radius: 16px;
            padding: 32px;
            color: white;
            text-align: center;
        }

        .vm-card:nth-child(2) {
            background: linear-gradient(135deg, #00695C, #00897B);
        }

        .vm-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: rgba(255,255,255,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
        }

        .vm-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .vm-desc {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.8;
        }

        /* Timeline Section */
        .timeline-section {
            background: white;
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.06);
        }

        .timeline-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 48px;
            text-align: center;
            color: var(--text-dark);
        }

        .timeline {
            position: relative;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--gov-blue), var(--tech-blue));
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 48px;
            display: grid;
            grid-template-columns: 1fr 80px 1fr;
            gap: 0;
            align-items: center;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item:nth-child(odd) .timeline-left {
            text-align: right;
            padding-right: 40px;
        }

        .timeline-item:nth-child(odd) .timeline-right {
            text-align: left;
            padding-left: 40px;
        }

        .timeline-item:nth-child(even) .timeline-left {
            text-align: left;
            padding-left: 40px;
            order: 3;
        }

        .timeline-item:nth-child(even) .timeline-center {
            order: 2;
        }

        .timeline-item:nth-child(even) .timeline-right {
            text-align: right;
            padding-right: 40px;
            order: 1;
        }

        .timeline-center {
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1;
        }

        .timeline-marker {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--gov-blue), var(--tech-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(0,90,172,0.3);
        }

        .timeline-date {
            margin-bottom: 8px;
        }

        .timeline-date-year {
            font-size: 24px;
            font-weight: 800;
            color: var(--gov-blue);
        }

        .timeline-date-month {
            font-size: 13px;
            color: var(--text-light);
        }

        .timeline-phase {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .timeline-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .timeline-image {
            height: 140px;
            border-radius: 12px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--gov-blue), var(--tech-blue));
            margin-top: 12px;
        }

        .timeline-image i {
            font-size: 48px;
            color: rgba(255,255,255,0.4);
        }

        .timeline-image.alt {
            background: linear-gradient(135deg, #1565C0, #0D47A1);
        }

        .timeline-image.green {
            background: linear-gradient(135deg, #00695C, #00897B);
        }

        .timeline-image.purple {
            background: linear-gradient(135deg, #7B1FA2, #9C27B0);
        }

        .timeline-image.orange {
            background: linear-gradient(135deg, #F57C00, #EF6C00);
        }

        .timeline-empty {
            visibility: hidden;
        }

        /* Footer */
        .footer {
            background: var(--gov-dark);
            padding: 40px 60px;
            color: rgba(255,255,255,0.6);
            margin-top: 60px;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .footer-links { display: flex; gap: 32px; }
        .footer-links a { color: rgba(255,255,255,0.6); text-decoration: none; font-size: 13px; }
        .footer-links a:hover { color: white; }
        .footer-copy { font-size: 12px; color: rgba(255,255,255,0.4); }

        @media (max-width: 1200px) {
            .content-container { grid-template-columns: 1fr; }
            .sidebar-menu { display: none; }
            .timeline::before { left: 24px; }
            .timeline-item {
                grid-template-columns: 48px 1fr;
                gap: 24px;
            }
            .timeline-item:nth-child(odd) .timeline-left,
            .timeline-item:nth-child(even) .timeline-left {
                text-align: left;
                padding-left: 0;
                order: 2;
            }
            .timeline-item:nth-child(odd) .timeline-right,
            .timeline-item:nth-child(even) .timeline-right {
                text-align: left;
                padding-left: 0;
                order: 3;
            }
            .timeline-center {
                order: 1;
                justify-content: flex-start;
            }
            .timeline-item:nth-child(even) .timeline-left { order: 2; }
            .timeline-item:nth-child(even) .timeline-right { order: 3; }
            .vision-mission { grid-template-columns: 1fr; }
        }

        @media (max-width: 900px) {
            .top-nav { padding: 0 24px; }
            .nav-menu { display: none; }
            .page-banner { padding: 30px 24px; }
            .content-container { padding: 24px; }
            .timeline-section { padding: 24px; }
            .footer { padding: 40px 24px; }
            .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
        }