/* roulang page: index */
:root {
            --primary: #0A4C7B;
            --sport-green: #00A86B;
            --bg-light: #F5F7FA;
            --white: #FFFFFF;
            --dark-text: #1A1A1A;
            --mid-text: #5A5A5A;
            --light-border: #E8ECF1;
            --shadow-sm: 0 2px 12px rgba(10, 76, 123, 0.08);
            --shadow-hover: 0 6px 20px rgba(10, 76, 123, 0.15);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-lg: 16px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --font-inter: "Inter", "PingFang SC", sans-serif;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            background-color: var(--bg-light);
            color: var(--dark-text);
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        /* 导航 */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--white);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 22px;
            color: var(--primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
            position: relative;
            overflow: hidden;
        }

        .logo-icon::after {
            content: "⚽";
            font-size: 18px;
            filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
        }

        .nav-menu {
            display: flex;
            gap: 32px;
            list-style: none;
            align-items: center;
        }

        .nav-menu a {
            font-size: 15px;
            color: var(--mid-text);
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .btn-primary {
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            display: inline-block;
            transition: var(--transition);
            border: none;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--sport-green);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 10px 26px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            display: inline-block;
            transition: var(--transition);
        }

        .btn-outline:hover {
            background: #E8F0F8;
        }

        .btn-large {
            background: var(--sport-green);
            color: white;
            padding: 16px 40px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(0,168,107,0.3);
        }

        .btn-large:hover {
            background: #008c5a;
            transform: translateY(-2px);
        }

        .hamburger {
            display: none;
            font-size: 26px;
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                padding: 20px 24px;
                gap: 16px;
            }
            .nav-menu.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-cta {
                display: none;
            }
            .mobile-cta {
                display: block;
                margin-top: 10px;
            }
        }

        /* Hero */
        .hero {
            padding: 80px 0 100px;
            background: var(--bg-light);
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .hero-content {
            flex: 1;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--dark-text);
            margin-bottom: 24px;
        }

        .hero-content .subtitle {
            font-size: 18px;
            color: var(--mid-text);
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-image {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .hero-image img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-lg);
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .hero-grid {
                flex-direction: column;
            }
            .hero-content h1 {
                font-size: 32px;
            }
        }

        /* 通用板块 */
        section {
            padding: 100px 0;
        }

        .section-title {
            font-size: 32px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 16px;
            text-align: center;
        }

        .section-desc {
            color: var(--mid-text);
            max-width: 700px;
            margin: 0 auto 56px;
            text-align: center;
            font-size: 17px;
        }

        /* 服务卡片 2x2 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .card-icon {
            width: 56px;
            height: 56px;
            background: #E8F0F8;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 28px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
        }

        .service-card p {
            color: var(--mid-text);
            font-size: 15px;
        }

        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 优势数据 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--sport-green);
            font-family: var(--font-inter);
        }

        .stat-label {
            font-size: 15px;
            color: var(--mid-text);
            margin-top: 8px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* 赛事案例不对称 */
        .cases-row {
            display: flex;
            gap: 24px;
            align-items: stretch;
        }

        .case-card {
            background: white;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .case-img {
            height: 180px;
            object-fit: cover;
        }

        .case-body {
            padding: 20px;
        }

        .case-body h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .tag {
            display: inline-block;
            border: 1px solid var(--sport-green);
            color: var(--sport-green);
            font-size: 13px;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 10px;
        }

        .case-main {
            flex: 1.2;
        }
        .case-side {
            flex: 1;
        }

        @media (max-width: 768px) {
            .cases-row {
                flex-direction: column;
            }
        }

        /* 步骤 */
        .steps-container {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            position: relative;
        }

        .step-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            flex: 1;
            text-align: center;
            position: relative;
        }

        .step-circle {
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 16px;
            z-index: 2;
        }

        .step-line {
            position: absolute;
            top: 22px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: dashed #ccc;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .steps-container {
                flex-direction: column;
                gap: 28px;
            }
            .step-line {
                display: none;
            }
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--light-border);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 10px;
            font-weight: 600;
            font-size: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            color: var(--dark-text);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: #FAFBFC;
            padding: 0 10px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 16px 10px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* CTA */
        .cta-block {
            background: #E8F0F8;
            text-align: center;
            padding: 80px 20px;
        }

        /* Footer */
        .footer {
            background: #1A1A1A;
            color: #B0B0B0;
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
        }

        .footer a {
            color: #B0B0B0;
        }
        .footer a:hover {
            color: white;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }