* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            background: #fefcf8;
            color: #2e2a28;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 主色调：沉稳智慧蓝 + 暖金色点缀 */
        :root {
            --primary: #2c5f8a;
            --primary-dark: #1e4161;
            --primary-light: #6a9ec0;
            --accent: #e8b15c;
            --gray-bg: #f8f6f2;
            --text-dark: #2e2a28;
            --text-light: #5b554e;
            --border-light: #e2dbd1;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* 头部导航 */
        .header {
            background: white;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.02);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 2px solid var(--primary-light);
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }

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

        .nav-links {
            display: flex;
            gap: 36px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        /* 锚点跳转平滑 */
        .anchor-offset {
            scroll-margin-top: 90px;
        }

        /* 按钮 */
        .btn {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            padding: 12px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.2s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }

        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 20px rgba(44,95,138,0.2);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }

        /* Hero 区域 */
        .hero {
            background: linear-gradient(135deg, #f0f5fa 0%, #ffffff 100%);
            padding: 80px 0 60px;
            border-bottom: 1px solid var(--border-light);
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }

        .hero-text {
            flex: 1;
        }

        .hero-text h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero-text p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 28px;
        }

        .hero-image {
            flex: 1;
            background: #e2edf6;
            border-radius: 48px;
            height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 5rem;
            background-image: radial-gradient(circle at 20% 40%, rgba(106,158,192,0.15) 2%, transparent 2.5%);
            background-size: 30px 30px;
            box-shadow: 0 12px 24px rgba(0,0,0,0.02);
        }

        /* 章节样式 */
        .section {
            padding: 70px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .section:last-of-type {
            border-bottom: none;
        }

        .section-title {
            font-size: 2.3rem;
            color: var(--primary-dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 70px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .title-center {
            text-align: center;
        }
        .title-center::after {
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
        }

        .cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 36px;
            margin-top: 48px;
        }

        .card {
            background: white;
            border-radius: 28px;
            padding: 30px 26px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.03);
            transition: all 0.3s ease;
            border: 1px solid var(--border-light);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 25px 35px rgba(44,95,138,0.08);
            border-color: var(--primary-light);
        }

        .card-icon {
            font-size: 2.6rem;
            margin-bottom: 18px;
        }

        .card h3 {
            font-size: 1.6rem;
            margin-bottom: 14px;
            color: var(--primary);
        }

        .quote {
            background: #f0f4f8;
            border-left: 5px solid var(--accent);
            padding: 28px 32px;
            border-radius: 24px;
            margin: 40px 0;
            font-style: italic;
            font-size: 1.1rem;
            color: var(--text-dark);
        }

        /* 友情链接区域 */
        .friends-section {
            background: #f1f4f0;
            margin-top: 20px;
            padding: 40px 0;
        }
        .friends-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-top: 24px;
        }
        .friend-link {
            background: white;
            padding: 12px 28px;
            border-radius: 60px;
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            transition: all 0.2s;
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
            border: 1px solid #e0e6e0;
        }
        .friend-link:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .footer {
            background: #1e2c32;
            color: #cfdfe8;
            padding: 48px 0 28px;
            text-align: center;
        }
        .footer a {
            color: #cfdfe8;
            text-decoration: none;
        }

        @media (max-width: 768px) {
            .hero-text h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.8rem; }
            .nav {
                flex-direction: column;
                gap: 14px;
            }
            .nav-links {
                gap: 20px;
                flex-wrap: wrap;
                justify-content: center;
            }
            .container {
                padding: 0 20px;
            }
        }