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

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* ==================== 页面横幅 ==================== */
.page-banner {
    position: relative;
    height: 50vh;
    min-height: 400px;
    overflow: hidden;
}

.page-banner-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease-out;
}

.page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 45, 80, 0.8) 0%, rgba(0, 0, 0, 0.6) 100%);
}

.page-banner-content {
    position: relative;
    z-index: 10;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
}

.page-banner-title {
    font-size: 48px;
    letter-spacing: 10px;
    margin-bottom: 15px;
    animation: fadeInUp 1s ease forwards;
}

.page-banner-subtitle {
    font-size: 18px;
    letter-spacing: 3px;
    opacity: 0.8;
}

/* ==================== 企业简介板块 (重点修改部分) ==================== */
.intro-section {
    padding: 100px 0;
    background: #fdfdfd;
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.intro-header {
    text-align: center;
    margin-bottom: 60px;
}

.intro-label {
    display: inline-block;
    color: #2d8cf0;;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid #ccc0c0;
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 20px;
}
.culture-header{
  text-align: center;
}
.intro-title {
    font-size: 36px;
    color: #1a2b48;
    font-weight: 700;
    margin-bottom: 15px;
}

.intro-title-line {
    width: 50px;
    height: 3px;
    background: #d6d6d6;
    margin: 0 auto 20px;
}

.intro-subtitle {
    color: #d1d1d1;
    font-size: 16px;
    letter-spacing: 2px;
}

/* 核心视差卡片样式 */
.intro-main-wrapper {
    margin-bottom: 80px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.intro-parallax {
    position: relative;
    min-height: 550px;
    display: flex;
    align-items: center;
    justify-content: flex-end; /* 内容靠右，平衡视觉 */
}

.intro-parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 120%; /* 为视差留出空间 */
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.intro-parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(0,0,0,0.5) 0%, rgba(10, 45, 80, 0.8) 100%);
    z-index: 2;
}

.intro-parallax-content {
    position: relative;
    z-index: 3;
    padding: 60px;
    max-width: 700px;
    color: #fff;
}

.company-name-en {
    font-size: 14px;
    letter-spacing: 3px;
    opacity: 0.7;
    margin-bottom: 10px;
}

.company-name-cn {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.text-divider {
    width: 60px;
    height: 2px;
    background: #4facfe;
    margin-bottom: 30px;
}

.intro-description {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: justify;
    color: rgba(255,255,255,0.9);
}

.intro-description strong {
    color: #fff;
}

/* ==================== 数字增长动画 ==================== */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-item {
    background: #fff;
    padding: 40px 20px;
    text-align: center;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

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

.stat-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
}

.stat-icon svg {
    fill: #1e5799;
}

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: #1e5799;
}

.stat-number .unit {
    font-size: 18px;
}

.stat-label {
    font-size: 15px;
    color: #666;
    margin-top: 10px;
}

/* ==================== 发展历程 ==================== */
.timeline-section {
    position: relative;
    min-height: 100vh;
    padding: 100px 0;
    color: #fff;
}

.timeline-bg-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.timeline-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease;
}

.timeline-bg.active {
    opacity: 1;
}

.timeline-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 30, 60, 0.7);
}

.timeline-container {
    position: relative;
    z-index: 10;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.timeline-vertical {
    position: relative;
    margin-top: 80px;
}

.timeline-vertical::before {
    content: '';
    position: absolute;
    left: 50%;
    width: 2px;
    height: 100%;
    background: rgba(255,255,255,0.3);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    width: 50%;
    padding: 170px 40px;
    position: relative;
    opacity: 0.3;
    transition: 0.5s;
}

.timeline-item:nth-child(even) {
    align-self: flex-end;
    margin-left: 50%;
    justify-content: flex-start;
}

.timeline-item.active {
    opacity: 1;
}

.timeline-dot {
    position: absolute;
    right: -10px;
    top: 240px;
    width: 20px;
    height: 20px;
    background: #1e5799;
    border: 4px solid #fff;
    border-radius: 50%;
    z-index: 5;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -10px;
}

.timeline-item-content {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.2);
}

.timeline-item-year {
    font-size: 24px;
    font-weight: 700;
    color: #4facfe;
    display: block;
    margin-bottom: 10px;
}

/* ==================== 企业文化 ==================== */
.culture-section {
    padding: 100px 0;
    background: #fff;
}

.culture-slogan {
    text-align: center;
    margin: 40px 0 60px;
    background: #1a2b48; 
    color: #ffffff; 
    padding: 20px ;
}

.culture-slogan-main {
    font-size: 36px;
    color: #1e5799;
    font-weight: 700;
    letter-spacing: 5px;
}

.culture-slogan-sub {
    font-size: 18px;
    color: #888;
    margin-top: 10px;
}

.culture-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.culture-card {
    height: 380px;
    perspective: 1000px;
}

.culture-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.culture-card:hover .culture-card-inner {
    transform: rotateY(180deg);
}

.culture-card-front, .culture-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    text-align: center;
}

.culture-card-front {
    background: #f8f9fa;
    border: 1px solid #eee;
}

.culture-card-back {
    background: #1e5799;
    color: #fff;
    transform: rotateY(180deg);
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.culture-card-title {
    font-size: 22px;
    margin-bottom: 10px;
}

.culture-card-back-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}

.culture-card-back-list {
    list-style: none;
    font-size: 14px;
    text-align: left;
    line-height: 2;
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 992px) {
    .stats-section, .culture-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .intro-parallax {
        justify-content: center;
    }
    .intro-parallax-content {
        padding: 40px;
    }
}

@media (max-width: 768px) {
    .stats-section, .culture-cards {
        grid-template-columns: 1fr;
    }
    .page-banner-title {
        font-size: 32px;
    }
    .timeline-vertical::before {
        left: 20px;
    }
    .timeline-item {
        width: 100%;
        margin-left: 0 !important;
        justify-content: flex-start !important;
        padding-left: 50px;
    }
    .timeline-dot {
        left: 10px !important;
    }
}

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