* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        body {
            background: #f8fafc;
            color: #0a1e2f;
            line-height: 1.6;
            padding: 1.5rem 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 2rem;
            box-shadow: 0 20px 40px -10px rgba(0,20,40,0.2);
            overflow: hidden;
            padding: 2rem 2rem 2.5rem;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(145deg, #0b2b4a, #1d4e6f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
            line-height: 1.2;
            border-left: 8px solid #d42;
            padding-left: 1.5rem;
        }
        .subhead {
            font-size: 1.2rem;
            color: #2c3e50;
            margin-bottom: 2.5rem;
            padding-left: 2rem;
            border-bottom: 2px dashed #a0c4d9;
            padding-bottom: 1rem;
        }
        .subhead strong {
            background: #f0f7ff;
            padding: 0.2rem 0.4rem;
            border-radius: 12px;
            color: #0d3b5e;
        }
        h2 {
            font-size: 2rem;
            margin: 2.2rem 0 1.2rem 0;
            position: relative;
            padding-bottom: 0.5rem;
        }
        h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: #d42;
            border-radius: 4px;
        }
        .angle-grid {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .angle-card {
            background: #ffffff;
            border-radius: 2rem;
            padding: 1.8rem 2rem;
            box-shadow: 0 6px 18px rgba(0,20,30,0.05);
            border: 1px solid rgba(0,60,100,0.08);
            transition: transform 0.2s;
        }
        .angle-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -10px rgba(0,70,120,0.15);
        }
        .angle-card h3 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #173f5f;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .angle-card h3 span {
            background: #1d4e6f;
            color: white;
            font-size: 1.2rem;
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            margin-right: 10px;
        }
        .angle-card p {
            margin-bottom: 1rem;
            font-size: 1.1rem;
            color: #1b2f40;
        }
        strong, b {
            color: #b13e2b;
            font-weight: 700;
            background: linear-gradient(to right, #fff1ed, #fff);
            padding: 0.1rem 0.3rem;
            border-radius: 6px;
            font-weight: 800;
        }
        .faq-section {
            margin-top: 3.5rem;
            background: #f1f6fa;
            border-radius: 2.5rem;
            padding: 2.5rem 2rem;
        }
        .faq-section h2 {
            margin-top: 0;
        }
        .faq-list {
            display: grid;
            gap: 1.8rem;
            margin-top: 1.8rem;
        }
        .faq-item {
            background: white;
            border-radius: 1.5rem;
            padding: 1.5rem 2rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.02);
            border-left: 6px solid #3a7ca5;
        }
        .faq-item p {
            margin-top: 0.6rem;
            font-size: 1.1rem;
        }
        .faq-question {
            font-size: 1.4rem;
            font-weight: 700;
            color: #0d2f44;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-question::before {
            content: "❓";
            font-size: 1.8rem;
            color: #d42;
        }
        .platform-section {
            margin-top: 2.5rem;
            text-align: center;
            background: #0a1a27;
            border-radius: 3rem;
            padding: 2.5rem 2rem 2.2rem;
            color: white;
        }
        .platform-section h2 {
            color: white;
            margin-top: 0;
            font-weight: 600;
        }
        .platform-section h2::after {
            background: #f5b041;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
        }
        .platform-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin: 2rem 0 0.5rem;
        }
        .platform-btn {
            display: inline-block;
            background: white;
            color: #0b2b4a;
            text-decoration: none;
            font-weight: 700;
            padding: 0.9rem 1.8rem;
            border-radius: 60px;
            font-size: 1.2rem;
            box-shadow: 0 8px 18px rgba(0,0,0,0.2);
            transition: all 0.2s;
            border: 2px solid transparent;
            min-width: 130px;
        }
        .platform-btn:hover {
            background: #f5b041;
            color: #0a1a27;
            transform: scale(1.05);
            border-color: white;
            box-shadow: 0 15px 25px rgba(0,0,0,0.3);
        }
        footer {
            margin-top: 2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #5f7d9c;
            border-top: 1px solid #d0e0ed;
            padding-top: 1.8rem;
        }
        /* 移动端优化 */
        @media (max-width: 640px) {
            .container { padding: 1.5rem 1rem; }
            h1 { font-size: 2rem; padding-left: 1rem; }
            h2 { font-size: 1.8rem; }
            .angle-card { padding: 1.5rem 1.2rem; }
            .angle-card h3 { font-size: 1.5rem; }
            .faq-question { font-size: 1.2rem; }
            .platform-btn { padding: 0.7rem 1.2rem; font-size: 1rem; min-width: 110px; }
        }
        @media (max-width: 480px) {
            .platform-buttons { flex-direction: column; align-items: center; }
            .platform-btn { width: 80%; }
        }
        /* 模拟球场装饰 */
        .grass-line {
            height: 6px;
            background: repeating-linear-gradient(45deg, #2e7d32 0px, #2e7d32 20px, #81c784 20px, #81c784 40px);
            width: 100%;
            border-radius: 6px;
            margin: 30px 0 10px;
        }