:root {
    --primary-color: #4338ca;
    --primary-dark: #3730a3;
    --primary-light: #6366f1;
    --accent-color: #f97316;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
}

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

body {
    font-family: 'PingFang SC', 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* 增强标题区域 */
header {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: var(--text-white);
    border-radius: var(--border-radius-lg);
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
}

header h1 {
    font-size: 3.2rem;
    margin-bottom: 20px;
    font-weight: 800;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    color: var(--text-white);
    letter-spacing: 0.5px;
}

header p {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.5;
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    color: #f0f0ff;
}

/* 增强内容区块 */
.content-section {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 5px solid var(--primary-light);
}

.content-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.content-section h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e5e7eb;
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-section h2:before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 30px;
    background: var(--primary-color);
    border-radius: 4px;
}

.content-section h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-top: 30px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-section h3 i {
    color: var(--accent-color);
}

.content-section ul {
    padding-left: 20px;
    margin-bottom: 25px;
}

.content-section li {
    margin-bottom: 15px;
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary-light);
}

/* 增强特性列表 */
.feature-list {
    list-style: none;
    padding: 0;
    margin-bottom: 25px;
}

.feature-list li {
    padding: 15px 0;
    border-bottom: 1px solid #f3f4f6;
    display: flex;
    align-items: flex-start;
    transition: transform 0.2s ease;
}

.feature-list li:hover {
    transform: translateX(5px);
}

.feature-list li:before {
    content: "\f058";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--accent-color);
    margin-right: 15px;
    font-size: 1.2rem;
}

/* 改善按钮样式 */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    display: inline-block;
    padding: 18px 25px;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn:after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.5s ease;
    z-index: -1;
}

.btn:hover:after {
    transform: scaleX(1);
    transform-origin: left;
}

.btn.primary {
    background-color: var(--accent-color);
    color: white;
    box-shadow: 0 4px 6px rgba(249, 115, 22, 0.25);
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn.primary:hover {
    background-color: #ea580c;
}

.btn.secondary:hover {
    background-color: rgba(79, 70, 229, 0.1);
}

/* 增强高亮区域 */
.highlight {
    background-color: #fff7ed;
    padding: 20px 15px;
    margin: 20px 0;
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--accent-color);
}

.highlight p {
    margin: 10px 0;
}

footer {
    text-align: center;
    padding: 30px;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-top: 40px;
    border-top: 1px solid #e5e7eb;
}

/* 增强FAQ区域 */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.faq-item {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    padding: 5px;
    transition: all 0.3s ease;
    border-left: 3px solid var(--primary-color);
}

.faq-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.faq-question {
    padding: 15px;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.faq-answer {
    padding: 0 15px 15px 15px;
    color: var(--text-light);
    border-top: 1px solid #f3f4f6;
    font-size: 1.05rem;
    line-height: 1.6;
}

.download-tip-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
    backdrop-filter: blur(5px);
}

.tip-content {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    max-width: 90%;
    width: 450px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: slideIn 0.4s ease;
    border-top: 5px solid var(--accent-color);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.tip-content p {
    color: var(--text-dark);
    font-size: 1.2rem;
    margin-bottom: 1.8rem;
    line-height: 1.6;
}

.tip-close-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0.8rem 2.5rem;
    border-radius: var(--border-radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(249, 115, 22, 0.25);
}

.tip-close-btn:hover {
    background: #ea580c;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(249, 115, 22, 0.25);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header {
        padding: 35px 15px;
        margin-bottom: 25px;
        border-radius: var(--border-radius-md);
    }
    
    header h1 {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    header p {
        font-size: 1.1rem;
    }
    
    .content-section {
        padding: 20px 15px;
        margin-bottom: 20px;
        border-radius: var(--border-radius-md);
    }
    
    .content-section h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
        padding-bottom: 10px;
    }
    
    .content-section h2:before {
        height: 25px;
        width: 6px;
    }
    
    .content-section h3 {
        font-size: 1.2rem;
        margin-top: 20px;
        margin-bottom: 15px;
    }
    
    .feature-list li {
        padding: 10px 0;
    }
    
    .feature-list li:before {
        font-size: 1rem;
        margin-right: 10px;
    }
    
    .faq-question {
        padding: 10px;
        font-size: 1rem;
    }
    
    .faq-answer {
        padding: 0 10px 10px 10px;
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 14px 20px;
        font-size: 1rem;
    }
    
    .tip-content {
        padding: 1.8rem;
        width: 90%;
    }
    
    .tip-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .tip-close-btn {
        padding: 0.7rem 1.8rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .content-section h2 {
        font-size: 1.3rem;
    }
    
    .content-section h3 {
        font-size: 1.1rem;
    }
    
    .feature-list li {
        font-size: 0.95rem;
    }
    
    .tip-close-btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
}