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

        body {
            font-family: 'Inter', sans-serif;
            background-color: #ffffff;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 容器约束 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 通用section样式 */
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 60px 0;
        }
        .bg-light {
            background-color: #f8fafc;
        }
        .bg-white {
            background-color: #ffffff;
        }
        .section-title {
            font-weight: 700;font-size: 3rem;
            text-align: center;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            text-align: center;
            color: #475569;
            max-width: 700px;font-size: 1.9rem;
            margin: 0 auto 48px auto;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            transition: all 0.25s ease;
            cursor: pointer;
            border: none;font-size: 1.8rem;
            text-decoration: none;
        }
        .btn-primary {
            background: #2d6a4f;
            color: white;
            box-shadow: 0 4px 8px rgba(45, 106, 79, 0.2);
        }
        .btn-primary:hover {
            background: #1f543e;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 106, 79, 0.25);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid #2d6a4f;
            color: #2d6a4f;
        }
        .btn-outline:hover {
            background: #e9f5ef;
            border-color: #1f543e;
            color: #1f543e;
        }
        .btn-cta {
            background: #f97316;
            color: white;font-size: 2rem;
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
        }
        .btn-cta:hover {
            background: #ea580c;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: #3b82f6;
            color: white;
        }
        .btn-accent:hover {
            background: #2563eb;
            transform: translateY(-2px);
        }

        /* 卡片网格 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 16px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }
        .feature-card {
            background: #ffffff;
            border-radius: 28px;
            padding: 32px 24px;
            transition: all 0.3s ease;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            border: 1px solid #eef2f6;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: #cbdde6;
            box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.1);
        }
        .feature-icon {
            background: #eef2f0;
            width: 70px;
            height: 70px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 30px;
            color: #2d6a4f;font-size: 4rem;
            margin-bottom: 24px;
        }
        .feature-card h3 {
            font-weight: 700;
            margin-bottom: 12px;font-size: 2rem;
        }
        .feature-card p {
            color: #475569;font-size: 1.5rem
        }

        /* 双栏布局 */
        .two-col {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }
        .two-col > div {
            flex: 1;
        }
        .smart-list {
            list-style: none;
            margin-top: 24px;
        }
        .smart-list li {
            margin-bottom: 16px;
            display: flex;font-size: 1.5rem;
            align-items: center;
            gap: 12px;
        }
        .smart-list li i {
            color: #2d6a4f;
            width: 28px;
        }

        /* 三列图标准模块（AI作业批改流程） */
        .flow-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            margin-top: 20px;
        }
        .flow-item {
            background: white;
            border-radius: 32px;
            padding: 28px 20px;
            flex: 1;
            min-width: 200px;
            text-align: center;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
            border: 1px solid #e9edf2;
            transition: all 0.2s;
        }
        .flow-item i {
            color: #2d6a4f;font-size: 3rem;
            margin-bottom: 16px;
        }
        .flow-item h4 {
            font-weight: 700;font-size: 2rem;
            margin-bottom: 8px;
        }
        .flow-item p {
            color: #475569;font-size: 1.3rem;
        }
        .badge {
            background: #eef2ff;
            color: #2d6a4f;
            border-radius: 40px;
            padding: 4px 14px;
            font-weight: 600;font-size: 1.3rem;
            display: inline-block;
            margin-top: 12px;
        }

        /* 错题本卡片样式 */
        .error-card {
            background: linear-gradient(135deg, #fff7ed 0%, #ffffff 100%);
            border-radius: 28px;
            padding: 28px;
            border: 1px solid #ffedd5;
        }
        .error-stats {
            display: flex;
            gap: 16px;
            margin: 20px 0;
            flex-wrap: wrap;
        }
        .error-stat-item {
            background: #fffbeb;
            border-radius: 20px;
            padding: 12px 20px;
            flex: 1;font-size: 2rem;
            text-align: center;
        }

        /* 案例卡片 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .case-card {
            background: white;
            border-radius: 28px;
            padding: 24px;
            border: 1px solid #edf2f7;
            transition: 0.2s;
        }
        .case-card .quote {
            font-style: normal;
            color: #334155;font-size: 1.5rem;
            margin: 16px 0;
            line-height: 1.5;
        }
        .case-card .org {
            font-weight: 800;font-size: 1.5rem;
            color: #0f172a;
        }
        .case-card .stat {
            color: #f97316;font-size: 1.5rem;
            font-weight: 700;
        }

        /* CTA表单区 */
        .form-card {
            background: linear-gradient(135deg, #f0f9f4 0%, #ffffff 100%);
            border-radius: 40px;
            padding: 48px 40px;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
            border: 1px solid #d9e6df;
        }
        .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 32px;
        }
        .input-group {
            flex: 1;
            min-width: 200px;
        }
        .input-group input {
            width: 100%;
            padding: 14px 20px;
            border-radius: 60px;
            border: 1px solid #cbd5e1;
            transition: 0.2s;
            background: white;
        }
        .input-group input:focus {

            outline: none;
            border-color: #2d6a4f;
            box-shadow: 0 0 0 3px rgba(45,106,79,0.2);
        }

        /* 导航栏 + Footer复用自体育版，稍作调整 */
        .navbar {
            background: white;
            padding: 16px 0;
            border-bottom: 1px solid #edf2f7;
            position: sticky;
            top: 0;
            z-index: 50;
            backdrop-filter: blur(0px);
            background: rgba(255,255,255,0.96);
        }
        .nav-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-weight: 800;
            color: #1e293b;
        }
        .logo span {
            color: #2d6a4f;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            color: #334155;
            font-weight: 500;
        }
        .nav-links a:hover {
            color: #2d6a4f;
        }
        @media (max-width: 700px) {
            .nav-links { display: none; }
            .navbar .btn-outline { display: none; }
        }

        .footer {
            background-color: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 24px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col {
            min-width: 140px;
        }
        .footer-col h4 {
            color: white;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            text-decoration: none;
            margin-bottom: 10px;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: #f97316;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid #1e293b;
            padding-top: 28px;
        }
        .hero {
            padding: 150px 0 60px;
            background: linear-gradient(120deg, #ffffff 0%, #f4faf7 100%);
        }
        .hero h1 {
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;font-size: 4.5rem;
            margin-bottom: 20px;
        }
        .hero .highlight {
            color: #f97316;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin: 32px 0 16px;
        }
        @media (max-width: 768px) {
            .section { padding: 60px 0; }
            .hero h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.8rem; }
            .form-card { padding: 32px 24px; }
        }


/*ty*/

        .method-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            margin-top: 20px;
        }
        .method-item {
            background: white;
            border-radius: 32px;
            padding: 28px 20px;
            flex: 1;
            min-width: 200px;
            text-align: center;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
            border: 1px solid #e9edf2;
        }
        .method-item i {
            font-size: 5rem;
            color: #2d6a4f;
            margin-bottom: 16px;
        }
   .method-item p {
       font-size: 1.5rem;}
        .method-item h4 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
 /* 体测专用卡片 */
        .fitness-card {
            background: linear-gradient(135deg, #f0f9f4 0%, #ffffff 100%);
            border-radius: 32px;
            padding: 28px;
            border: 1px solid #d9e6df;
        }
        .metric-row {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 20px 0;
        }
        .metric-item {
            background: white;
            border-radius: 24px;
            padding: 16px;
            flex: 1;
            text-align: center;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
            border: 1px solid #eef2f6;
        }
        .metric-value {
            font-size:3.2rem;
            font-weight: 800;
            color: #2d6a4f;
        }
 .trend-up {
            color: #10b981;
            font-size: 1.6rem;
        }
        .trend-down {
            color: #ef4444;
        }
        .chart-placeholder {
            background: #f1f5f9;
            border-radius: 24px;
            padding: 20px;
            margin-top: 16px;
            text-align: center;
        }