* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: #1a365d;
            --secondary: #2c5282;
            --accent: #e53e3e;
            --light: #f7fafc;
            --dark: #1a202c;
            --text: #2d3748;
            --border: #e2e8f0;
            --success: #38a169;
            --warning: #dd6b20;
        }
        
        body {
            font-family: 'Noto Sans SC', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text);
            background-color: var(--light);
            overflow-x: hidden;
        }
        
        a {
            text-decoration: none;
            color: var(--secondary);
            transition: all 0.3s ease;
        }
        
        a:hover {
            color: var(--accent);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 14px 32px;
            background-color: var(--accent);
            color: white;
            border-radius: 4px;
            font-weight: 600;
            text-align: center;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        .btn:hover {
            background-color: #c53030;
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid white;
            color: white;
        }
        
        .btn-outline:hover {
            background-color: white;
            color: var(--primary);
        }
        
        .section {
            padding: 90px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 20px;
            font-size: 2.4rem;
            color: var(--primary);
            position: relative;
            font-weight: 700;
        }
        
        .section-subtitle {
            text-align: center;
            margin-bottom: 60px;
            color: #718096;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            font-size: 1.1rem;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--warning));
            margin: 15px auto 0;
            border-radius: 2px;
        }
        
        /* 顶部导航 */
        header {
            background-color: var(--primary);
            color: white;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-right: 10px;
        }
        
        .logo-text {
            display: flex;
            flex-direction: column;
        }
        
        .logo-main {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            line-height: 1;
        }
        
        .logo-sub {
            font-size: 0.9rem;
            color: #cbd5e0;
            letter-spacing: 1.5px;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
            position: relative;
        }
        
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 8px 0;
            font-size: 1.05rem;
        }
        
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover:after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        
        /* Banner区域 */
        .banner {
            background: linear-gradient(115deg, var(--primary) 0%, #1e3a5f 100%);
            color: white;
            padding: 120px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }
.full-width-container {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}
        
        .banner:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 20% 30%, rgba(255,255,255,0.05) 0%, transparent 20%),
                radial-gradient(circle at 80% 70%, rgba(255,255,255,0.05) 0%, transparent 20%);
        }
        
        .banner-content {
            position: relative;
            z-index: 1;
            max-width: 850px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .banner h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            line-height: 1.2;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        
        .banner p {
            font-size: 1.3rem;
            margin-bottom: 35px;
            opacity: 0.9;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .banner-btns {
            display: flex;
            justify-content: center;
            gap: 25px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        
        /* 卡片模块 */
        .card-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
            border: 1px solid var(--border);
        }
        
        .card:hover {
            transform: translateY(-12px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        
        .card-header {
            padding: 25px 25px 15px;
            border-bottom: 1px solid var(--border);
        }
        
        .card-icon {
            font-size: 2.5rem;
            color: var(--accent);
            margin-bottom: 15px;
        }
        
        .card h3 {
            margin-bottom: 12px;
            color: var(--primary);
            font-size: 1.4rem;
        }
        
        .card-content {
            padding: 25px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .card p {
            margin-bottom: 20px;
            color: #4a5568;
            flex: 1;
            line-height: 1.7;
        }
        
        .card-footer {
            padding: 0 25px 25px;
        }
        
        /* 学习路径 */
        .learning-path {
            background-color: #edf2f7;
            position: relative;
            overflow: hidden;
            padding: 90px 0;
        }
        
        .learning-path:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 8px;
            background: linear-gradient(90deg, var(--accent), var(--warning));
        }
        
        .steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            max-width: 1000px;
            margin: 0 auto;
            padding-top: 40px;
        }
        
        .steps::before {
            content: '';
            position: absolute;
            top: 70px;
            left: 50px;
            right: 50px;
            height: 4px;
            background-color: #cbd5e0;
            z-index: 1;
        }
        
        .step {
            text-align: center;
            position: relative;
            z-index: 2;
            width: 18%;
        }
        
        .step-number {
            width: 70px;
            height: 70px;
            background-color: white;
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: bold;
            margin: 0 auto 20px;
            border: 3px solid #cbd5e0;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.4s ease;
        }
        
        .step.active .step-number {
            background-color: var(--accent);
            color: white;
            border-color: var(--accent);
            transform: scale(1.1);
        }
        
        .step h3 {
            margin-bottom: 12px;
            font-size: 1.15rem;
            color: var(--primary);
        }
        
        .step p {
            font-size: 0.95rem;
            color: #718096;
        }
        
        /* 社群模块 */
        .community {
            background: linear-gradient(135deg, #2c5282 0%, var(--primary) 100%);
            color: white;
            text-align: center;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
            margin: 70px 0;
            position: relative;
            transform: translateY(0);
            transition: transform 0.4s ease;
        }
        
        .community:hover {
            transform: translateY(-10px);
        }
        
        .community-content {
            position: relative;
            z-index: 2;
            padding: 60px 20px 50px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .community h2 {
            font-size: 2.4rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .community-subtitle {
            font-size: 1.25rem;
            margin-bottom: 40px;
            opacity: 0.9;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .benefits {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 25px;
            margin: 50px 0;
            text-align: left;
        }
        
        .benefit-item {
            display: flex;
            align-items: flex-start;
            padding: 20px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            transition: all 0.3s ease;
        }
        
        .benefit-item:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }
        
        .benefit-icon {
            font-size: 26px;
            margin-right: 18px;
            color: var(--accent);
            min-width: 40px;
            text-align: center;
        }
        
        .benefit-content h3 {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        
        .benefit-content p {
            font-size: 0.95rem;
            opacity: 0.85;
            line-height: 1.6;
        }
        
        /* 会员套餐 - 优化版 */
        .pricing-table {
            display: flex;
            justify-content: center;
            gap: 25px;
            margin: 50px 0 30px;
            flex-wrap: wrap;
        }
        
        .pricing-plan {
            flex: 1;
            min-width: 280px;
            max-width: 320px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 12px;
            padding: 35px 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            position: relative;
            transition: all 0.4s ease;
            border: 1px solid rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .pricing-plan:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
        }
        
        .pricing-plan.popular {
            border: 2px solid var(--accent);
            transform: scale(1.05);
        }
        
        .pricing-plan.popular:hover {
            transform: scale(1.05) translateY(-10px);
        }
        
        .popular-tag {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: white;
            padding: 6px 25px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: 0 4px 10px rgba(229, 62, 62, 0.3);
        }
        
        .plan-name {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 5px;
            text-align: center;
        }
        
        .price {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin: 15px 0 5px;
            line-height: 1;
        }
        
        .price span {
            font-size: 1.4rem;
            font-weight: 600;
        }
        
        .price-period {
            color: #666;
            text-align: center;
            font-size: 1rem;
            margin-bottom: 25px;
            font-weight: 500;
        }
        
        .plan-features {
            margin: 25px 0;
            padding: 0;
            list-style: none;
            width: 100%;
        }
        
        .plan-features li {
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
            font-size: 0.95rem;
            color: #4a5568;
        }
        
        .plan-features li i {
            margin-right: 12px;
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
        }
        
        .plan-features li i.fa-check {
            color: var(--success);
        }
        
        .plan-features li i.fa-times {
            color: #ccc;
        }
        
        .pricing-btn {
            display: block;
            width: 100%;
            padding: 14px;
            background-color: var(--accent);
            color: white;
            border-radius: 4px;
            font-weight: 600;
            text-align: center;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            margin-top: auto;
        }
        
        .pricing-btn:hover {
            background-color: #c53030;
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        
        .member-count {
            text-align: center;
            color: white;
            font-size: 1.1rem;
            margin-top: 20px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.1);
            display: inline-block;
            padding: 10px 25px;
            border-radius: 30px;
        }
        
        .member-count strong {
            color: var(--accent);
            font-weight: 700;
        }
        
        /* FAQ部分 */
        .faq-section {
            background-color: #f8f9fa;
            padding: 90px 0;
        }
        
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: white;
            border-radius: 10px;
            margin-bottom: 20px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .faq-item:hover {
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }
        
        .faq-question {
            padding: 25px;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #f8fafc;
        }
        
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent);
            font-size: 1.3rem;
        }
        
        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
        }
        
        .faq-answer-content {
            padding: 0 0 30px 0;
            color: #4a5568;
            line-height: 1.8;
        }
        
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        
        .faq-item.active .faq-answer {
            max-height: 500px;
            padding: 0 25px;
        }
        
        /* 用户反馈 */
        .testimonials {
            background-color: #f8f9fa;
            padding: 90px 0;
        }
        
        .testimonial-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 35px;
        }
        
        .testimonial {
            background: white;
            padding: 35px;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            transition: all 0.4s ease;
        }
        
        .testimonial:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
        }
        
        .testimonial:before {
            content: '"';
            position: absolute;
            top: 20px;
            left: 25px;
            font-size: 5rem;
            color: rgba(26, 54, 93, 0.08);
            font-family: serif;
            line-height: 1;
            font-weight: bold;
        }
        
        .testimonial-content {
            position: relative;
            z-index: 2;
            margin-bottom: 25px;
            font-style: italic;
            line-height: 1.7;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
        }
        
        .author-avatar {
            width: 55px;
            height: 55px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            margin-right: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: white;
            font-size: 1.3rem;
        }
        
        .author-info h4 {
            margin-bottom: 5px;
            color: var(--primary);
        }
        
        .author-info p {
            font-size: 0.9rem;
            color: #718096;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 80px 0 30px;
            clip-path: polygon(0 10%, 100% 0, 100% 100%, 0 100%);
            margin-top: 60px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 45px;
            margin-bottom: 60px;
        }
        
        .footer-column h3 {
            margin-bottom: 25px;
            font-size: 1.3rem;
            position: relative;
            padding-bottom: 12px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 45px;
            height: 3px;
            background-color: var(--accent);
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column li {
            margin-bottom: 14px;
        }
        
        .footer-column a {
            color: #cbd5e0;
            display: inline-block;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }
        
        .footer-column a:hover {
            color: white;
            transform: translateX(5px);
        }
        
        .footer-about p {
            color: #a0aec0;
            margin-bottom: 25px;
            line-height: 1.8;
            font-size: 0.95rem;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-link {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            font-size: 1.1rem;
        }
        
        .social-link:hover {
            background-color: var(--accent);
            transform: translateY(-5px);
        }
        
        .disclaimer {
            background-color: rgba(229, 62, 62, 0.08);
            border-left: 4px solid var(--accent);
            padding: 20px;
            margin: 40px 0;
            border-radius: 0 8px 8px 0;
        }
        
        .disclaimer h4 {
            color: var(--accent);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .disclaimer h4 i {
            font-size: 1.3rem;
        }
        
        .disclaimer p {
            color: #e53e3e;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #2d3748;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .banner h1 {
                font-size: 2.6rem;
            }
            
            .steps {
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .step {
                width: 45%;
                margin-bottom: 40px;
            }
            
            .steps::before {
                display: none;
            }
            
            .pricing-table {
                flex-direction: column;
                align-items: center;
            }
            
            .pricing-plan {
                max-width: 450px;
            }
            
            .pricing-plan.popular {
                transform: scale(1);
            }
        }
        
        @media (max-width: 768px) {
            .section {
                padding: 70px 0;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .banner {
                padding: 100px 0 80px;
            }
            
            .banner h1 {
                font-size: 2.2rem;
            }
            
            .banner p {
                font-size: 1.1rem;
            }
            
            .banner-btns {
                flex-direction: column;
                gap: 15px;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }
            
            .step {
                width: 100%;
                max-width: 300px;
            }
        }
        
        @media (max-width: 576px) {
            .section-title {
                font-size: 1.8rem;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .logo-main {
                font-size: 1.6rem;
            }
            
            .banner h1 {
                font-size: 1.9rem;
            }
            
            .community h2 {
                font-size: 2rem;
            }
        }