* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
        }
        :root {
            --primary: #0c4a6e;
            --primary-dark: #082f49;
            --accent: #22d3ee;
            --silver: #e2e8f0;
            --card-bg: rgba(255, 255, 255, 0.06);
            --card-border: rgba(255, 255, 255, 0.08);
            --text: #cbd5e1;
            --text-light: #94a3b8;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }
        body {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            background-attachment: fixed;
        }
        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }
        /* 导航 */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 47, 73, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(34, 211, 238, 0.15);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            flex-wrap: wrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: var(--silver);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 100px;
            transition: all 0.3s;
            display: block;
        }
        .nav-links a:hover {
            background: rgba(34, 211, 238, 0.15);
            color: var(--accent);
            transform: translateY(-1px);
        }
        .nav-links a.nav-brand {
            background: linear-gradient(135deg, var(--accent), #0ea5e9);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            padding: 8px 22px;
            border-radius: 100px;
            box-shadow: 0 2px 20px rgba(34, 211, 238, 0.3);
        }
        /* 区块通用 */
        .section {
            padding: 72px 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(34, 211, 238, 0.05));
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 16px;
            text-transform: uppercase;
            border: 1px solid rgba(34, 211, 238, 0.2);
        }
        .section-title {
            font-size: 38px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            max-width: 700px;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        /* 卡片 */
        .card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 20px;
            padding: 32px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all 0.4s ease;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(34, 211, 238, 0.08);
            transform: translateY(-4px);
        }
        .card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at top right, rgba(34, 211, 238, 0.08), transparent 50%);
            opacity: 0;
            transition: opacity 0.4s;
        }
        .card:hover::before {
            opacity: 1;
        }
        /* 按钮 */
        .btn {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 100px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            background: linear-gradient(135deg, var(--accent), #0ea5e9);
            color: #fff;
            box-shadow: 0 4px 25px rgba(34, 211, 238, 0.35);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 35px rgba(34, 211, 238, 0.45);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(34, 211, 238, 0.1);
            border-color: var(--accent);
            box-shadow: 0 0 25px rgba(34, 211, 238, 0.2);
        }
        /* 网格 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 768px) {
            .grid-3,
            .grid-4,
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 28px;
            }
            .navbar .container {
                height: auto;
                padding: 10px 16px;
                flex-direction: column;
                gap: 8px;
            }
            .nav-links {
                justify-content: center;
                width: 100%;
            }
            .nav-links a {
                padding: 6px 12px;
                font-size: 13px;
            }
        }
        /* 图片 */
        .img-fluid {
            width: 100%;
            height: auto;
            border-radius: 16px;
            display: block;
            object-fit: cover;
        }
        .img-rounded {
            border-radius: 16px;
        }
        /* 引用 */
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(34, 211, 238, 0.05);
            border-radius: 0 12px 12px 0;
            font-style: italic;
        }
        /* 列表 */
        .list-check {
            list-style: none;
            padding: 0;
        }
        .list-check li {
            padding: 8px 0 8px 36px;
            position: relative;
        }
        .list-check li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 8px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.2);
            color: var(--accent);
            text-align: center;
            line-height: 24px;
            font-size: 13px;
        }