/* 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;
}

/* 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-light);
    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: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* Hero 区块样式 */
.pttekno-hero {
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    color: white;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

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

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

.pttekno-hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.pttekno-hero-title span {
    display: block;
    color: #ffffff;
}

.pttekno-hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.pttekno-hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTQ0MCIgaGVpZ2h0PSI3NjUiIHZpZXdCb3g9IjAgMCAxNDQwIDc2NSIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHBhdGggZD0iTTE0NDAgNzY1SDBWMEgxNDQwVjc2NVoiIGZpbGw9IndoaXRlIi8+CjxjaXJjbGUgY3g9Ijc2NS41IiBjeT0iNDMyLjUiIHI9IjQzMi41IiBmaWxsPSJ3aGl0ZSIvPgo8Y2lyY2xlIGN4PSIxNzcuNSIgY3k9IjQ1Ny41IiByPSIxNzcuNSIgZmlsbD0id2hpdGUiLz4KPGNpcmNsZSBjeD0iMTI2My41IiBjeT0iMjQ3LjUiIHI9IjE3Ni41IiBmaWxsPSJ3aGl0ZSIvPgo8L3N2Zz4K');
    background-size: cover;
    z-index: 1;
}

/* 历史概述部分 */
.pttekno-history-overview {
    padding: 5rem 0;
    background-color: var(--background-white);
}

.pttekno-history-intro {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: center;
}

.pttekno-intro-content h2 {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.pttekno-intro-content h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.pttekno-intro-content p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 1.05rem;
}

.pttekno-intro-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* 时间轴部分 */
.pttekno-timeline {
    padding: 5rem 0;
    background-color: var(--background-light);
}

.pttekno-timeline-container {
    position: relative;
}

.pttekno-timeline-container:before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 85px;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    z-index: 1;
}

.pttekno-timeline-item {
    display: flex;
    margin-bottom: 4rem;
    position: relative;
}

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

.pttekno-timeline-year {
    flex-shrink: 0;
    width: 170px;
    padding-right: 2rem;
    text-align: right;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.pttekno-timeline-content {
    flex: 1;
    background-color: var(--background-white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    margin-left: 2rem;
    position: relative;
}

.pttekno-timeline-content:before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 4px solid var(--background-white);
    left: -38px;
    top: 25px;
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.pttekno-timeline-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.pttekno-timeline-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.pttekno-timeline-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* 成长统计部分 */
.pttekno-growth-stats {
    padding: 5rem 0;
    background-color: var(--background-white);
}

.pttekno-stats-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

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

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

.pttekno-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.pttekno-stat-card {
    background-color: var(--background-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.pttekno-stat-card:hover {
    transform: translateY(-10px);
}

.pttekno-stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.pttekno-stat-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.pttekno-stat-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 奖项部分 */
.pttekno-awards {
    padding: 5rem 0;
    background-color: var(--background-light);
}

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

.pttekno-award-card {
    display: flex;
    background-color: var(--background-white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.pttekno-award-image {
    width: 150px;
    height: 150px;
    flex-shrink: 0;
    margin-right: 2rem;
    object-fit: contain;
}

.pttekno-award-content {
    flex: 1;
}

.pttekno-award-content h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.pttekno-award-content > p {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.pttekno-award-description p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 未来愿景部分 */
.pttekno-future-vision {
    padding: 5rem 0;
    background-color: var(--background-white);
}

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

.pttekno-vision-text h2 {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.pttekno-vision-text h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.pttekno-vision-text > p {
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.pttekno-vision-goals {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.pttekno-vision-goal {
    background-color: var(--background-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.pttekno-vision-goal:hover {
    box-shadow: var(--box-shadow);
    transform: translateX(5px);
}

.pttekno-vision-goal h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.pttekno-vision-goal p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.pttekno-vision-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* CTA 部分 */
.pttekno-cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    color: white;
}

.pttekno-cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.pttekno-cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pttekno-cta-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.pttekno-cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.pttekno-cta-buttons .pttekno-btn {
    padding: 0.9rem 2rem;
}

.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-awards-grid {
        grid-template-columns: 1fr;
    }
    
    .pttekno-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 992px) {
    .pttekno-history-intro,
    .pttekno-vision-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .pttekno-award-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .pttekno-award-image {
        margin-right: 0;
        margin-bottom: 1.5rem;
    }
    
    .pttekno-footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .pttekno-timeline-container:before {
        left: 25px;
    }
    
    .pttekno-timeline-year {
        width: 50px;
        font-size: 1.5rem;
        padding-right: 0;
        text-align: center;
    }
    
    .pttekno-timeline-content:before {
        left: -32px;
    }
}

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

@media (max-width: 576px) {
    .pttekno-nav-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .pttekno-subnav-list {
        flex-direction: column;
        align-items: center;
    }
    
    .pttekno-cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pttekno-hero {
        padding: 3rem 0;
    }
    
    .pttekno-hero-title {
        font-size: 2rem;
    }
    
    .pttekno-timeline-content {
        padding: 1.5rem;
        margin-left: 1rem;
    }
}