/* ==========================================
   About Page Styles (关于我们) - 生产级适配版
   ========================================== */

/* --- 基础重置 --- */
* {
    box-sizing: border-box;
}

html, body {
    max-width: 100%;
    overflow-x: hidden; /* 防止移动端横向溢出 */
}

body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: #2f3338;
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: min(100%, 1240px);
    margin: 0 auto;
    padding: 0 20px;
}

.about-page {
    min-height: 100vh;
}

/* --- 通用标题样式 --- */
.section-header-center {
    text-align: center;
    margin-bottom: 60px;
}

.section-header-center h2 {
    margin: 20px 0 12px;
    font-size: 28px;
    font-weight: bold;
    color: #2f3338;
}

.section-header-center .header-line {
    width: 60px;
    height: 6px;
    background-color: #ff3010;
    margin: 0 auto;
    border-radius: 2px;
}
.culture-img-en {
    display: none !important;
}
.culture-img-zh {
    display: block !important;
}

/* 当页面语言切换为英文时：隐藏中文图，显示英文图 */
html[lang="en"] .culture-img-zh {
    display: none !important;
}
html[lang="en"] .culture-img-en {
    display: block !important;
}
/* ==========================================
   Hero 头部
   ========================================== */
.about-hero {
    position: relative;
    min-height: 500px;
    padding-top: 60px;
    overflow: hidden;
    background-color: #f9fafb;
    background-image: url("https://sld2025.oss-cn-shanghai.aliyuncs.com/gw/wei-tu-2x-15.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.about-hero-inner {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
}

.about-hero-copy {
    position: relative;
    z-index: 2;
    padding-top: 20px;
}

.about-hero-copy h1 {
    margin: 0 0 10px;
    font-size: 48px;
    font-weight: bold;
    letter-spacing: 2px;
    color: rgba(51, 51, 51, 1);
}

.about-hero-copy p {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
    color: rgba(101, 113, 130, 1);
}

/* ==========================================
   关于我们介绍
   ========================================== */
.about-intro {
    padding: 80px 0;
    background-color: #f4f6f8; /* 弱网环境图片未加载时的兜底安全色 */
    background-image: url("https://sld2025.oss-cn-shanghai.aliyuncs.com/gw/wei-tu-22.png");
    background-repeat: no-repeat;
    background-size: 100% 100%; /* PC端维持原貌，移动端将在媒体查询中重置为cover */
}

.about-intro-grid {
    display: grid;
    grid-template-columns: 1.7fr 1fr;
    align-items: center;
}

.intro-text h2 {
    font-size: 36px;
    font-weight: bold;
    margin: 0 0 24px;
    color: rgba(51, 51, 51, 1);
}

.intro-text p {
    font-size: 12px;
    line-height: 1.9;
    color: rgba(51, 51, 51, 0.64);
    margin: 0 0 16px;
    text-indent: 2em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    /* gap: 20px; */
    margin-top: 40px;
}

.stat-item {
    text-align: center;
}

.stat-item .item_img {
    width: 50px;
    height: 50px;
    margin: 10px auto;
}

.stat-item .item_img img {
    width: 100%;
    height: 100%;
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 900;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: #6d7888;
}

/* ==========================================
   发展历程 (时间线)
   ========================================== */
.timeline-section {
    padding: 40px 0 60px;
    background: #fff;
}

/* 替代原先硬编码的负边距内联样式 */
.timeline-top-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto;
    margin-top: -80px;
    margin-bottom: 30px;
    position: relative;
    z-index: 2;
}

.timeline-wrapper {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    border-left: 2px dashed #ff3010;
    transform: translateX(-50%);
    z-index: 0;
    opacity: 0.6;
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 30px 1fr;
    gap: 20px;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
}

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

.timeline-left {
    text-align: right;
    padding-right: 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.timeline-right {
    text-align: left;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.timeline-year {
    font-size: 26px;
    font-weight: 900;
    color: #ff3010;
    line-height: 1.2;
    margin-top: 4px;
}

.timeline-mid {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    position: relative;
}

.timeline-dot {
    width: 16px;
    height: 16px;
    background-image: url("https://sld2025.oss-cn-shanghai.aliyuncs.com/gw/tuo-yuan-xing-2x.png");
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.timeline-img {
    width: 16px;
    height: 16px;
    background-image: url("https://sld2025.oss-cn-shanghai.aliyuncs.com/gw/tuo-yuan-xing-bei-fen-11-2x.png");
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.timeline-content h3 {
    margin: 0 0 6px;
    font-size: 18px;
    color: #2f3338;
    font-weight: bold;
}

.timeline-content p {
    margin: 0;
    font-size: 14px;
    color: rgba(153, 153, 153, 1);
    line-height: 1.7;
    text-indent: 2em;
    text-align:left;
}

/* ==========================================
   企业文化
   ========================================== */
.culture-section {
    position: relative;
}

.culture-visual {
    position: relative;
}

.culture-bg-img {
    height: 550px;
    width: 100%;
}

.culture-glow-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 48, 16, 0.25) 0%, rgba(255, 255, 255, 0) 70%);
    box-shadow: 0 0 60px rgba(255, 48, 16, 0.15);
    z-index: 1;
}

.culture-tag {
    position: absolute;
    padding: 6px 18px;
    background: #ff3010;
    color: #fff;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(255, 48, 16, 0.2);
}

.culture-tag.tag-top { top: 60px; left: 50%; transform: translateX(-50%); }
.culture-tag.tag-right { top: 50%; right: 40px; transform: translateY(-50%); }
.culture-tag.tag-bottom { bottom: 60px; left: 50%; transform: translateX(-50%); }
.culture-tag.tag-left { top: 50%; left: 40px; transform: translateY(-50%); }

.culture-label {
    position: absolute;
    font-size: 12px;
    color: #6d7888;
    z-index: 2;
    text-align: center;
    max-width: 160px;
}

.culture-label.label-top { top: 92px; left: 50%; transform: translateX(-50%); }
.culture-label.label-right { top: 52%; right: -10px; transform: translateY(-50%); }
.culture-label.label-bottom { bottom: 92px; left: 50%; transform: translateX(-50%); }
.culture-label.label-left { top: 52%; left: -10px; transform: translateY(-50%); }

/* ==========================================
   联系我们
   ========================================== */
.contact-section {
    padding-top: 80px;
    padding-bottom: 80px;
    /* background-color: #f4f6f8; 弱网环境兜底色 */
    background-image: url("https://sld2025.oss-cn-shanghai.aliyuncs.com/gw/ju-xing-2x.png");
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto 40px;
}

.contact-card {
    background: #fff;
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid #f0f2f5;
    transition: transform 0.3s;
}

.contact-card:hover {
    transform: translateY(-4px);
}

.contact-icon {
    margin-bottom: 16px;
}

.icon-circle {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-circle img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.contact-card h3 {
    margin: 0 0 6px;
    font-size: 18px;
    font-weight: bold;
    color: #2f3338;
}

.contact-card p {
    margin: 0;
    font-size: 14px;
    color: rgba(51, 51, 51, 1);
}

/* ==========================================
   知识产权与软著
   ========================================== */
.copyright-section {
    padding: 80px 0;
    background: #fff;
}

.copyright-header-info {
    text-align: center;
    margin-bottom: 50px;
}

.copyright-subtitle {
    color: #6d7888;
    font-size: 16px;
    margin-bottom: 16px;
}

.copyright-stats {
    color: #6d7888;
    font-size: 16px;
    line-height: 1.6;
}

.copyright-stats span {
    color: #ff3010;
    font-weight: bold;
    font-size: 18px;
    margin: 0 4px;
}

.copyright-scroll-wrapper {
    display: flex;
    flex-direction: column;
    gap: 32px;
    overflow: hidden;
}

.scroll-row-container {
    position: relative;
    overflow: hidden;
    width: 100%;
}

.scroll-track {
    display: flex;
    width: max-content;
    align-items: stretch;
}

.copyright-card {
    width: 400px; 
    flex-shrink: 0;
    margin-right: 24px;
    background: #f9fafb;
    border-radius: 12px;
    padding: 24px;
    min-width: 400px;
    display: flex;
    align-items: flex-start;
    transition: box-shadow 0.3s ease;
}

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

.copyright-icon-box {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(255, 48, 16, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ff3010;
    margin-right: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.copyright-content h3 {
    font-size: 18px;
    font-weight: bold;
    margin: 0 0 8px 0;
    color: #2f3338;
    line-height: 1.4;
}

.copyright-content p {
    font-size: 14px;
    color: #999;
    margin: 0;
}


/* ==========================================
   响应式适配 (合并 PC 原始与移动端深度优化)
   ========================================== */

/* --- 1024px 平板横屏 --- */
@media (max-width: 1024px) {
    .about-intro-grid {
        gap: 30px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .culture-tag.tag-right { right: 20px; }
    .culture-tag.tag-left { left: 20px; }
    .culture-label.label-right { right: 10px; }
    .culture-label.label-left { left: 10px; }
}

/* --- 768px 平板及大屏手机 --- */
@media (max-width: 768px) {
    .about-hero {
        min-height: 360px;
        padding-top: 56px;
    }
    .about-hero-copy h1 { font-size: 40px; }
    .about-hero-copy p { font-size: 16px; }

    /* 背景图防止强制拉伸变形 */
    .about-intro, 
    .contact-section {
        background-size: cover !important;
        background-position: center center !important;
    }

    .about-intro { padding: 50px 0 30px; }
    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .stat-item .item_img {
        width: 40px;
        height: 40px;
        margin: 5px auto;
    }
    .stat-number {
        font-size: 26px;
        margin-bottom: 2px;
    }
    .stat-label { font-size: 12px; }

    /* 时间轴适配 */
    .timeline-top-icon {
        margin-top: -50px;
    }
    .timeline-section { padding: 40px 0 50px; }
    .timeline-line {
        left: 16px;
        transform: none;
    }
    .timeline-item {
        grid-template-columns: 1fr 20px 1fr;
        gap: 20px;
        margin-bottom: 30px;
    }
    .timeline-left, .timeline-right {
        text-align: left;
        padding-right: 0;
        padding-left: 40px;
        grid-column: 1 / -1;
        order: 2;
    }
    .timeline-mid {
        grid-column: 1 / 2;
        order: 1;
        align-items: flex-start;
        padding-left: 6px;
    }
    .timeline-year { font-size: 18px; }
    .timeline-content h3 { font-size: 16px; }

    /* 企业文化适配 */
    .culture-section { padding: 40px 0 50px; }
    .culture-visual { height: 320px; }
    .culture-bg-img { height: 320px; }
    .culture-glow-center {
        width: 140px;
        height: 140px;
    }
    .culture-tag {
        font-size: 12px;
        padding: 4px 12px;
    }
    .culture-tag.tag-top { top: 30px; }
    .culture-tag.tag-bottom { bottom: 30px; }
    .culture-tag.tag-left { left: 20px; }
    .culture-tag.tag-right { right: 20px; }
    .culture-label {
        font-size: 10px;
        max-width: 100px;
    }
    .culture-label.label-top { top: 56px; }
    .culture-label.label-bottom { bottom: 56px; }
    .culture-label.label-left { left: -4px; }
    .culture-label.label-right { right: -4px; }

    /* 联系我们适配 */
    .contact-section { padding: 40px 0 50px; }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        max-width: 400px;
    }
    .contact-card { padding: 30px 16px; }
    .icon-circle {
        width: 60px;
        height: 60px;
    }

    /* 软著滚动卡片防溢出与弹性适配 */
    .copyright-card {
        width: 80vw !important;
        min-width: 260px !important; 
        padding: 16px;
        margin-right: 12px;
    }
    .copyright-scroll-wrapper { gap: 16px; }
    .copyright-content h3 { font-size: 15px; }
    .copyright-content p { font-size: 12px; }
    .copyright-stats { font-size: 14px; }
}

/* --- 480px 小屏手机端 --- */
@media (max-width: 480px) {
    /* 容器全局安全边距收缩 */
    .container { padding: 0 16px; }

    .about-hero-copy h1 { font-size: 32px; }
    .about-hero-copy p { font-size: 14px; }

    .about-intro { padding: 80px 0 20px; }
    .intro-text h2 { font-size: 22px; }
    .stat-number { font-size: 22px; }

    /* 时间轴进一步微调 */
    .timeline-section,
    .culture-section,
    .contact-section,
    .copyright-section {
        padding: 30px 0;
    }
    .timeline-item {
        gap: 8px;
        margin-bottom: 24px;
    }
    .timeline-left, .timeline-right { padding-left: 32px; }
    .timeline-year { font-size: 16px; }
    .timeline-content h3 { font-size: 14px; }
    .timeline-content p {
        font-size: 13px;
        line-height: 1.6;
    }

    /* 企业文化极简适配 */
    .culture-visual { height: 260px; }
    .culture-bg-img { height: 260px; }
    .culture-glow-center {
        width: 100px;
        height: 100px;
    }
    .culture-tag {
        font-size: 10px;
        padding: 3px 8px;
    }
    .culture-label {
        font-size: 9px;
        max-width: 80px;
    }
    .culture-label.label-top { top: 44px; }
    .culture-label.label-bottom { bottom: 44px; }

    /* 软著卡片排版极简模式 */
    .copyright-icon-box {
        width: 32px;
        height: 32px;
        margin-right: 12px;
    }
    .copyright-content h3 {
        font-size: 14px;
        margin-bottom: 4px;
    }
    .copyright-content p { font-size: 11px; }
}

.culture-title{
    margin: 30px auto 0 0;
    font-size: 22px;
}
.culture-subtitle{
    font-size: 22px;
    text-align: center;
    margin-bottom: 30px;
}