/* 变量设置 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #06b6d4;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --background-light: #f8fafc;
    --background-white: #ffffff;
    --border-light: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--background-light);
}

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

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

/* 容器样式 */
.pttekno-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 标题样式 */
.pttekno-section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
    line-height: 1.2;
}

.pttekno-section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 700px;
}

.pttekno-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

/* 按钮样式 */
.pttekno-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    text-align: center;
}

.pttekno-btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.pttekno-btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
}

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

.pttekno-btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.pttekno-btn-arrow {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 600;
    padding: 0;
    position: relative;
}

.pttekno-btn-arrow:after {
    content: '→';
    margin-left: 0.5rem;
    transition: var(--transition);
}

.pttekno-btn-arrow:hover:after {
    transform: translateX(5px);
}

/* 头部样式 */
.pttekno-header {
    background-color: var(--background-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.pttekno-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pttekno-logo {
    width: 180px;
    height: 60px;
    background-image: url('img/company-logo.png');
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
}

.pttekno-nav-list {
    display: flex;
    gap: 2rem;
}

.pttekno-nav-item a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.pttekno-nav-item a:hover, .pttekno-nav-item.active a {
    color: var(--primary-color);
}

.pttekno-nav-item.active a:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.pttekno-header-actions {
    display: flex;
    align-items: center;
}

/* 子页面导航 */
.pttekno-subpage-nav {
    background-color: var(--background-white);
    border-bottom: 1px solid var(--border-light);
    padding: 0.75rem 0;
}

.pttekno-subnav-list {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.pttekno-subnav-item a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.pttekno-subnav-item a:hover, .pttekno-subnav-item.active a {
    color: var(--primary-color);
}

.pttekno-subnav-item.active a:after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* 英雄区域 */
.pttekno-hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.pttekno-hero-content {
    position: relative;
    z-index: 2;
}

.pttekno-hero-text {
    max-width: 600px;
}

.pttekno-hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.pttekno-hero-title span {
    color: var(--primary-color);
}

.pttekno-hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.pttekno-hero-bg-shapes {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-image: radial-gradient(circle at 90% 10%, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0) 50%),
                      radial-gradient(circle at 10% 90%, rgba(14, 165, 233, 0.15) 0%, rgba(14, 165, 233, 0) 50%);
    z-index: 1;
}

/* 软件类型部分 */
.pttekno-software-types {
    padding: 5rem 0;
    background-color: var(--background-white);
}

.pttekno-software-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.pttekno-software-card {
    background-color: var(--background-light);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.pttekno-software-card:hover {
    transform: translateY(-5px);
}

.pttekno-software-icon {
    margin-bottom: 1.75rem;
    display: flex;
    align-items: center;
}

.pttekno-software-icon img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.pttekno-software-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.pttekno-software-card p {
    margin-bottom: 1.25rem;
    color: var(--text-light);
    flex-grow: 1;
}

.pttekno-software-features {
    padding-left: 1.25rem;
    list-style-type: disc;
    margin-top: auto;
}

.pttekno-software-features li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

/* 软件功能部分 */
.pttekno-software-features {
    padding: 5rem 0;
    background-color: var(--background-light);
}

.pttekno-features-showcase {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.pttekno-showcase-visual {
    text-align: center;
}

.pttekno-showcase-visual img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.pttekno-features-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.pttekno-features-column {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.pttekno-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
}

.pttekno-feature-icon {
    flex-shrink: 0;
}

.pttekno-feature-icon img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.pttekno-feature-text {
    flex: 1;
}

.pttekno-feature-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.pttekno-feature-text p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 实施流程部分 */
.pttekno-implementation {
    padding: 5rem 0;
    background-color: var(--background-white);
}

.pttekno-process-stages {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.pttekno-stage {
    display: flex;
    background-color: var(--background-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.pttekno-stage:hover {
    transform: translateX(5px);
    box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.1);
}

.pttekno-stage-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem;
    width: 200px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.pttekno-stage-icon {
    margin-bottom: 1rem;
}

.pttekno-stage-icon img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.pttekno-stage-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.pttekno-stage-content {
    flex: 1;
    padding: 2rem;
}

.pttekno-stage-content p {
    margin-bottom: 1.25rem;
    color: var(--text-light);
}

.pttekno-stage-deliverables {
    padding-left: 1.25rem;
    list-style-type: disc;
}

.pttekno-stage-deliverables li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

/* 案例研究部分 */
.pttekno-case-study {
    padding: 5rem 0;
    background-color: var(--background-light);
}

.pttekno-case-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.pttekno-case-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.pttekno-case-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.pttekno-case-details {
    padding: 1rem;
}

.pttekno-case-details h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.pttekno-case-client {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.pttekno-case-challenge,
.pttekno-case-solution,
.pttekno-case-results {
    margin-bottom: 1.5rem;
}

.pttekno-case-details h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.pttekno-case-details p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.pttekno-case-details ul {
    padding-left: 1.25rem;
    list-style-type: disc;
}

.pttekno-case-details ul li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* CTA 部分 */
.pttekno-cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.pttekno-cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.pttekno-cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.pttekno-cta-text {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.pttekno-cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.pttekno-cta-buttons .pttekno-btn {
    min-width: 180px;
}

.pttekno-cta-buttons .pttekno-btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.pttekno-cta-buttons .pttekno-btn-outline {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.pttekno-cta-buttons .pttekno-btn-outline:hover {
    background-color: white;
    color: var(--primary-color);
}

/* 页脚样式 */
.pttekno-footer {
    background-color: #1e293b;
    color: #e2e8f0;
    padding: 5rem 0 2rem;
}

.pttekno-footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.pttekno-footer-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pttekno-footer-logo {
    margin-bottom: 1rem;
}

.pttekno-footer-description {
    color: #94a3b8;
    line-height: 1.7;
}

.pttekno-footer-social {
    display: flex;
    gap: 1rem;
}

.pttekno-social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.pttekno-social-link:hover {
    background-color: var(--primary-color);
}

.pttekno-footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.pttekno-footer-title {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: white;
}

.pttekno-footer-menu li, .pttekno-footer-contact li {
    margin-bottom: 0.75rem;
}

.pttekno-footer-menu a {
    color: #94a3b8;
    transition: var(--transition);
}

.pttekno-footer-menu a:hover {
    color: white;
}

.pttekno-footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: #94a3b8;
}

.pttekno-icon {
    font-size: 1.2rem;
    color: var(--primary-light);
}

.pttekno-footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    color: #94a3b8;
}

.pttekno-footer-legal {
    display: flex;
    gap: 1.5rem;
}

.pttekno-footer-legal a {
    color: #94a3b8;
}

.pttekno-footer-legal a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 1100px) {
    .pttekno-software-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 992px) {
    .pttekno-features-columns {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .pttekno-case-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .pttekno-case-image {
        margin: 0 auto;
        max-width: 500px;
    }
    
    .pttekno-footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .pttekno-stage {
        flex-direction: column;
    }
    
    .pttekno-stage-header {
        width: 100%;
        padding: 1.5rem;
        flex-direction: row;
        justify-content: flex-start;
        gap: 1.5rem;
    }
    
    .pttekno-stage-icon {
        margin-bottom: 0;
    }
}

@media (max-width: 768px) {
    .pttekno-header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pttekno-nav-list {
        gap: 1.5rem;
    }
    
    .pttekno-subnav-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .pttekno-header-actions {
        margin-top: 1rem;
    }
    
    .pttekno-hero-title {
        font-size: 2.5rem;
    }
    
    .pttekno-section-title {
        font-size: 2rem;
    }
    
    .pttekno-software-grid {
        grid-template-columns: 1fr;
    }
    
    .pttekno-footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .pttekno-footer-bottom {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        text-align: center;
    }
    
    .pttekno-feature-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .pttekno-feature-icon {
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .pttekno-nav-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .pttekno-cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pttekno-hero {
        padding: 3rem 0;
    }
    
    .pttekno-hero-title {
        font-size: 2rem;
    }
}