h1 {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: left;
    margin-bottom: 30px;
    line-height: 1.3;
    color: #fff;
    width: 100%;
    max-width: 1500px;
    margin-left: auto;
    margin-right: auto;
}

h1 span {
    color: #2CC1C5;
    font-weight: 300;
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 25px;
    margin-top: 50px;
    color: #fff;
    width: 100%;
    max-width: 1500px;
    margin-left: auto;
    margin-right: auto;
}

p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    font-weight: 300;
    color: #fff;
    width: 100%;
    max-width: 1500px;
    margin-left: auto;
    margin-right: auto;
}

hr {
    border: none;
    height: 1px;
    background-color: #fff;
    margin: 40px auto;
    width: 100%;
    max-width: 1500px;
}
/* 导航项样式 */
.nav-item {
    flex: 1;
    text-align: center;
    padding: 15px 0;
    color: #fff;
    font-size: 18px;
    text-decoration: none;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    position: relative;
}

/* 选中状态 - 上品团队 */
.nav-item.active {
    background-color: #00C08B; /* 绿色背景 */
}

.nav-item.active span {
    color: #fff; /* 保持文字为白色 */
}

/* 响应式调整 */
@media (max-width: 768px) {
    .nav-item {
        font-size: 16px;
        padding: 12px 0;
    }
}

@media (max-width: 480px) {
    .nav-item {
        font-size: 14px;
        padding: 10px 0;
    }
}
.highlight {
    font-weight: 400;
    color: #f0f0f0;
}

.model-container {
    width: 100%;
    max-width: 1500px;
    position: relative;
    margin: 0 auto;
}

/* 中心菱形 */
.center-diamond {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    transform: translate(-50%, -50%) rotate(45deg);
}

.center-diamond span {
    color: #000;
    font-size: 2rem;
    font-weight: bold;
    transform: rotate(-45deg);
}

/* 四个方向箭头 */
.direction-line {
    position: absolute;
    background-color: #fff;
}

/* 连接线 */
.connection-line {
    position: absolute;
    background-color: #fff;
}

/* 顶部 - 用户 */
.top-section {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: 300px;
}

/* 右侧 - 竞争 */
.right-section {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    text-align: right;
    width: 300px;
}

/* 底部 - 自身 */
.bottom-section {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: 300px;
}

/* 左侧 - 环境 */
.left-section {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    text-align: left;
    width: 300px;
}

/* 方向标题 */
.direction-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 20px;
}

/* 内容列表 */
.content-list {
    list-style: none;
    line-height: 1.8;
}

.content-list li {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

/* 连接线样式 */
.line-top {
    top: 150px;
    left: 50%;
    width: 2px;
    height: 150px;
    transform: translateX(-50%);
}

.line-right {
    top: 50%;
    right: 150px;
    width: 150px;
    height: 2px;
    transform: translateY(-50%);
}

.line-bottom {
    bottom: 150px;
    left: 50%;
    width: 2px;
    height: 150px;
    transform: translateX(-50%);
}

.line-left {
    top: 50%;
    left: 150px;
    width: 150px;
    height: 2px;
    transform: translateY(-50%);
}

/* 箭头样式 */
.arrow {
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}

.arrow-top {
    top: 150px;
    left: 50%;
    border-width: 0 10px 20px 10px;
    border-color: transparent transparent #fff transparent;
    transform: translateX(-50%);
}

.arrow-right {
    top: 50%;
    right: 150px;
    border-width: 10px 0 10px 20px;
    border-color: transparent transparent transparent #fff;
    transform: translateY(-50%);
}

.arrow-bottom {
    bottom: 150px;
    left: 50%;
    border-width: 20px 10px 0 10px;
    border-color: #fff transparent transparent transparent;
    transform: translateX(-50%);
}

.arrow-left {
    top: 50%;
    left: 150px;
    border-width: 10px 20px 10px 0;
    border-color: transparent #fff transparent transparent;
    transform: translateY(-50%);
}

/* 响应式调整 */
@media (max-width: 900px) {
    .direction-title {
        font-size: 1.6rem;
    }
    
    .content-list li {
        font-size: 1rem;
    }
    
    .center-diamond {
        width: 150px;
        height: 150px;
    }
    
    .center-diamond span {
        font-size: 1.5rem;
    }
    
    .top-section,
    .bottom-section {
        width: 250px;
    }
    
    .left-section,
    .right-section {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .model-container {
        transform: scale(0.8);
    }
}

@media (max-width: 600px) {
    .model-container {
        transform: scale(0.7);
    }
    
    body {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .model-container {
        transform: scale(0.6);
    }
}