/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #FFFFFF;
    color: #121826;
    line-height: 1.6;
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.container {
    width: 100%;
    max-width: 1580px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    position: relative;
}

/* 背景色类 */
.bg-white {
    background-color: #FFFFFF;
}

.bg-light {
    background-color: #F5F7FA;
}

.bg-gradient {
    background: linear-gradient(135deg, #075E54, #128C7E);
}

/* 标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title h2 {
    font-size: 36px;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    background: linear-gradient(90deg, #25D366, #128C7E);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #128C7E);
    border-radius: 3px;
}

.section-title p {
    color: #3E4759;
    max-width: 700px;
    margin: 0 auto;
    font-size: 18px;
    line-height: 1.7;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 16px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: 0.6s;
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background-color: #25D366;
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-primary:hover {
    background-color: #128C7E;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
}

.btn-secondary {
    background-color: #FFFFFF;
    color: #25D366;
    border: 1px solid #25D366;
}

.btn-secondary:hover {
    background-color: #E8F5E9;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(37, 211, 102, 0.15);
}

/* Hero区样式 */
.hero {
    padding: 120px 0;
    color: #FFFFFF;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255,255,255,0.15) 0%, transparent 20%),
        radial-gradient(circle at 90% 70%, rgba(255,255,255,0.15) 0%, transparent 30%);
    animation: pulse 15s infinite;
}

@keyframes pulse {
    0% {
        background-size: 100% 100%, 120% 120%;
    }
    50% {
        background-size: 120% 120%, 100% 100%;
    }
    100% {
        background-size: 100% 100%, 120% 120%;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 35px auto 0;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 25px;
    line-height: 1.3;
    color:#FFF;
}

.hero p {
    font-size: 22px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: #FFFFFF;
    color: #25D366;
    font-size: 18px;
    padding: 16px 32px;
}

.hero .btn-secondary {
    background-color: transparent;
    color: #FFFFFF;
    border-color: #FFFFFF;
    font-size: 18px;
    padding: 16px 32px;
}

.software-preview {
    margin-top: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.software-preview img {
    width: 100%;
    display: block;
}

/* 软件简介 */
.intro-section {
    background-color: #FFFFFF;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: #E8F5E9;
    padding: 40px;
    border-radius: 12px;
    font-size: 18px;
    line-height: 1.8;
    color: #3E4759;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
}

/* 功能卡片样式 */
.features-section {
    background-color: #F5F7FA;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 3 列，每列等宽 */
    gap: 30px;
}

.feature-card {
    background-color: #FFFFFF;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #25D366, #128C7E);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: #E8F5E9;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: #25D366;
    font-size: 32px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover .feature-icon {
    background-color: #25D366;
    color: #FFFFFF;
    transform: scale(1.1) rotate(10deg);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #121826;
}

.feature-card p {
    color: #3E4759;
    line-height: 1.7;
}

/* 使用流程流程 */
.process-section {
    background-color: #FFFFFF;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    margin-top: 40px;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #128C7E);
    z-index: 1;
}

.process-step {
    flex: 1;
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    position: relative;
    z-index: 2;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #25D366;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.process-step h3 {
    margin-bottom: 15px;
    color: #121826;
}

.process-step p {
    color: #3E4759;
}

/* 适用人群样式 */
.users-section {
    background-color: #F5F7FA;
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.user-card {
    background-color: #FFFFFF;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.user-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.15);
}

.user-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background-color: #E8F5E9;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: #25D366;
    font-size: 24px;
}

.user-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #121826;
}

.user-card p {
    color: #3E4759;
    line-height: 1.7;
}

/* 对比对比表格样式 */
.comparison-section {
    background-color: #FFFFFF;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    border-radius: 12px;
    overflow: hidden;
    margin: 0 auto;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.comparison-table th {
    background-color: #E8F5E9;
    color: #128C7E;
    font-size: 18px;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover {
    background-color: rgba(232, 245, 233, 0.3);
}

.feature-name {
    font-weight: 600;
    width: 35%;
}

.comparison-note {
    background-color: #E8F5E9;
    padding: 20px;
    border-radius: 12px;
    margin-top: 30px;
    text-align: center;
    font-weight: 600;
    color: #075E54;
}

/* 系统要求样式 */
.system-requirements {
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    overflow: hidden;
    max-width: 1200px;
    margin: 0 auto;
}

.requirements-row {
    display: flex;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: background-color 0.3s ease;
}

.requirements-row:hover {
    background-color: rgba(232, 245, 233, 0.5);
}

.requirements-row:last-child {
    border-bottom: none;
}

.req-label {
    flex: 0 0 200px;
    background-color: #E8F5E9;
    padding: 20px 30px;
    font-weight: 600;
    color: #128C7E;
}

.req-content {
    flex: 1;
    padding: 20px 30px;
    color: #3E4759;
}

/* 下载与CTA样式 */
.download-section {
    background-color: #F5F7FA;
}

.download-container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    overflow: hidden;
}

.download-content {
    padding: 50px;
    text-align: center;
}

.download-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #121826;
}

.download-stats {
    background-color: #E8F5E9;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    font-size: 18px;
    font-weight: 600;
    color: #075E54;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.download-buttons .btn {
    font-size: 18px;
    padding: 16px 32px;
}

.testimonials {
    background-color: #E8F5E9;
    padding: 30px;
    border-radius: 12px;
    margin-top: 30px;
}

.testimonials h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #128C7E;
}

.testimonial-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 20px;
}

.testimonial-item:last-child {
    margin-bottom: 0;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #25D366;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.testimonial-content {
    text-align: left;
}

.testimonial-content p {
    color: #3E4759;
    margin-bottom: 10px;
}

.testimonial-author {
    font-weight: 600;
    color: #121826;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 42px;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .process-steps::before {
        display: none;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 100px 0;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .section-title h2 {
        font-size: 30px;
    }
    
    .section-title p {
        font-size: 16px;
    }
    
    .download-content {
        padding: 30px;
    }
    
    .requirements-row {
        flex-direction: column;
    }
    
    .req-label {
        flex: none;
        width: 100%;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .users-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 15px 10px;
        font-size: 14px;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .download-buttons .btn {
        width: 100%;
    }
}