/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* 顶部 LOGO 区域 */
.top-logo {
    min-height: 15vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    border-bottom: 1px solid #eee;
}
.logo-container img {
    max-width: 100px;
    height: auto;
}

/* 导航栏 - 浅紫色 */
.navbar {
    background-color: #b39ddb;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}
.nav-menu {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 2rem;
}
.nav-menu li {
    color: #2c3e50;
    font-size: 1.2rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    font-weight: 500;
}
.nav-menu li:hover {
    background-color: #e67e22;
    color: white;
}
.nav-menu li.active {
    background-color: #e67e22;
    color: white;
}

/* 主要内容 */
main {
    min-height: 60vh;
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* ========= 产品解读页 ========= */
.hero-fullscreen {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    padding: 0;
}
.hero-fullscreen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 左右分栏（独立彩色区块） */
.two-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin: 0;
    padding: 0;
}
.two-columns .col {
    flex: 1;
    padding: 2rem;
    min-width: 280px;
    text-align: center;
}
.col h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}
.col p {
    font-size: 1rem;
    line-height: 1.6;
    text-align: left;
}

/* 长标题 */
.section-title {
    text-align: center;
    margin: 2rem 0;
}
.large-title h2 {
    font-size: 2rem;
    color: #2c3e50;
}

/* 四个优势区块 */
.grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
}
.grid-item {
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.grid-item img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 1rem;
}
.grid-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #e67e22;
}

/* 普通大图 */
.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}
.full-width-image {
    width: 100%;
    margin: 2rem 0;
}
.full-width-image img {
    width: 100%;
    display: block;
}

/* ========= 专业团队页 ========= */
.center-title {
    text-align: center;
    margin: 2rem 0 1rem;
}
.center-title h2 {
    font-size: 2rem;
}
.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    letter-spacing: 2px;
}
.text-block {
    max-width: 1100px;
    margin: 1rem auto;
    padding: 0 20px;
    text-align: justify;
}

/* 三行两列布局，图片高度与文案区域一致 */
.team-features-grid {
    max-width: 1200px;
    margin: 2rem auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 0 20px;
}
.team-feature-item {
    display: flex;
    align-items: stretch;
    background: #f3e5f5;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.feature-img {
    flex: 0 0 150px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem;
}
.feature-img img {
    width: 100%;
    height: auto;
    max-height: 100%;
    object-fit: contain;
}
.feature-text {
    flex: 1;
    background-color: #b39ddb;
    color: #2c3e50;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.feature-text h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}
.feature-text p {
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ========= 关于我们页 ========= */
/* 参考源网站 .a_bg01 和 .a_ys_p 样式：深色半透明背景 + 白色加粗文字 + 明显阴影 */
.about-blurred-hero {
    position: relative;
    height: 80vh;
    overflow: hidden;
}
.blur-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.blur-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.3);
    filter: blur(3px);
}
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* 深紫色半透明，对比度高，同时隐约可见背景 */
    background-color: rgba(106, 27, 154, 0.85); /* 深紫色 #6a1b9a */
    display: flex;
    align-items: center;
    justify-content: center;
}
.overlay-content {
    display: flex;
    flex-wrap: wrap;
    width: 80%;
    max-width: 1000px;
    justify-content: space-between;
    align-items: center;
    color: white;
}
.about-text {
    flex: 2;
    padding-right: 2rem;
}
.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: white;
    font-weight: 600;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}
.about-text p {
    margin-bottom: 0.8rem;
    font-weight: 500;
    color: white;
    font-size: 16px;
    line-height: 30px;   /* 参考源网站 line-height */
    text-shadow: 1px 1px 2px rgba(0,0,0,0.4);
}
.about-logo {
    flex: 1;
    text-align: center;
}
.about-logo img {
    max-width: 150px;
    filter: brightness(0) invert(1);
}

/* 企业文化 */
.corporate-culture {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 20px;
}
.culture-header {
    text-align: center;
    margin-bottom: 2rem;
}
.title-box {
    display: inline-block;
    background-color: #b39ddb;
    color: #2c3e50;
    padding: 0.8rem 2rem;
    font-size: 1.8rem;
    font-weight: bold;
    border-radius: 40px;
}
.culture-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: center;
}
.culture-text {
    flex: 1;
    text-align: justify;
}
.culture-image {
    flex: 1;
    overflow: hidden;
}
.culture-image img {
    width: 100%;
    transition: transform 0.3s ease;
}
.culture-image img:hover {
    transform: scale(1.05);
}

/* 企业优势 */
.corporate-advantages {
    background-color: #e8eaf6;
    padding: 2rem 20px;
    text-align: center;
}
.corporate-advantages h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
}
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}
.adv-item {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}
.adv-text {
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.5;
}
.adv-item img {
    max-width: 100%;
    height: auto;
}
.hotline {
    margin-top: 3rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: #e67e22;
}

/* 底部紫色区域 */
.bottom-purple {
    background-color: #b39ddb;
    padding: 2rem 0 1rem;
    margin-top: 3rem;
}
.footer-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer-icon-item {
    text-align: center;
    color: #2c3e50;
    flex: 1;
    min-width: 100px;
}
.footer-icon-item img {
    width: 60px;
    margin-bottom: 0.5rem;
}
.footer-icon-item span {
    display: block;
    font-size: 0.9rem;
}
.copyright {
    text-align: center;
    color: #4a4a4a;
    font-size: 0.8rem;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #9c27b0;
}
.copyright a {
    color: #e67e22;
    text-decoration: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 0.5rem;
    }
    .nav-menu li {
        font-size: 1rem;
        padding: 0.3rem 0.8rem;
    }
    .two-columns {
        flex-direction: column;
    }
    .grid-2x2 {
        grid-template-columns: 1fr;
    }
    .team-features-grid {
        grid-template-columns: 1fr;
    }
    .team-feature-item {
        flex-direction: column;
    }
    .feature-img {
        width: 100%;
        padding: 0.5rem;
    }
    .overlay-content {
        flex-direction: column;
        text-align: center;
    }
    .about-text {
        padding-right: 0;
        margin-bottom: 1rem;
    }
    .culture-content {
        flex-direction: column;
    }
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    .footer-icons {
        flex-wrap: wrap;
        gap: 1rem;
    }
    .about-blurred-hero {
        height: 60vh;
    }
    .about-text p {
        font-size: 14px;
        line-height: 24px;
    }
}