如何让CSS Grid布局中的头像底部保持水平对齐？

我想要制作类似Facebook的头像组件，刚学习了CSS Grid并尝试将其应用在此处。目前所有部分都正常，唯独头像的底部无法处于同一水平线上，请问我哪里出现了错误？

我是一名初学者，欢迎指正，提前万分感谢！

以下是我的HTML（body部分）代码：

<body>
    <div class="layout">
        <div class="profile">
            <img src="../cat-1.jpg" class="profile-picture">
            <div class="profile-name">
                Oliver
            </div>
            <div class="profile-details">
                <div class="mutual-friends-bar">
                    <img class="mutual-friend" src="../dog-1.jpg">
                    <div class="no-mutual-friends">
                        2 mutual friends
                    </div>
                </div>
                <div class="add-friend">
                    <button>
                        Add Friend
                    </button>
                </div>
            </div>
        </div>


        <div class="profile">
            <img src="../cat-2.jpg" class="profile-picture">
            <div class="profile-name">
                Mimi
            </div>
            <div class="profile-details">
                <div class="mutual-friends-bar">
                    <img class="mutual-friend" src="../dog-1.jpg">
                    <div class="no-mutual-friends">
                        3 mutual friends
                    </div>
                </div>
                <div class="add-friend">
                    <button>
                        Add Friend
                    </button>
                </div>
            </div>
        </div>


        <div class="profile">
            <img src="../dog-2.jpg" class="profile-picture">
            <div class="profile-name">
                Rex
            </div>
            <div class="profile-details">
                <div class="mutual-friends-bar">
                    <img class="mutual-friend" src="../dog-1.jpg">
                    <div class="no-mutual-friends">
                        2 mutual friends
                    </div>
                </div>
                <div class="add-friend">
                    <button>
                        Add Friend
                    </button>
                </div>
            </div>
        </div>
    </div>
</body>

CSS代码：

* {
  font-family: Arial;
}

.profile {
  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3);
}

.profile-picture {
  width: 100%;
  object-fit: cover;
  margin-bottom: 7px;
}

.profile-name {
  display: inline-block;
  font-family: Arial;
  font-weight: 600;
  margin-left: 7px;
}
.profile-name:hover{
  cursor: pointer;
  text-decoration: underline;
}


.mutual-friends-bar {
  margin-left: 5px;
  display: grid;
  grid-template-columns: 25px 1fr;
  column-gap: 10px;
  border-radius: 50%;
  align-items: center;
}

.profile-details {
  display: grid;
  grid-template-rows:29px 29px;
  row-gap: 7px;
}

.mutual-friend {
  width: 100%;
  border-radius: 50%;
  cursor: pointer;
}

.no-mutual-friends {
  font-size: 13px;
  color: rgb(92, 92, 92);
}
.no-mutual-friends:hover{
  text-decoration: underline;
  cursor: pointer;
}

button {
  background-color: rgb(93, 105, 112);
  color: white;
  border: none;
  border-radius: 3px;
  padding: 5px 10px;
  margin-left: 5px;
}
button:hover{
  cursor: pointer;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr;
  column-gap: 18px;
}

核心问题是：你只给头像图片设置了width:100%，但未固定高度，不同比例的原图缩放后高度不一致，直接导致头像底部错位。

只需修改两处即可解决：

• 给.profile-picture添加固定高度，搭配已有的object-fit: cover，让所有头像强制保持统一高度，图片会自动裁剪适配，不会变形
• 给.layout添加align-items: start，保证卡片顶部对齐，视觉更整齐

修改后的关键CSS代码：

.profile-picture {
  width: 100%;
  height: 220px; /* 固定头像高度，可按需调整 */
  object-fit: cover;
  margin-bottom: 7px;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  column-gap: 18px;
  align-items: start; /* 让卡片顶部对齐 */
}

额外优化建议：给.profile添加padding-bottom: 10px，避免按钮紧贴卡片底部，提升视觉舒适度。

内容的提问来源于stack exchange，提问作者Toriqul_Islam