主页及相关页面

Change-Id: I588797f986de01217147f16f3c9727b67992fb8f
diff --git a/src/pages/MainPage.css b/src/pages/MainPage.css
new file mode 100644
index 0000000..91325c9
--- /dev/null
+++ b/src/pages/MainPage.css
@@ -0,0 +1,63 @@
+/* src/pages/MainPage.css */
+
+.main-page-wrapper {
+    min-height: 100vh;
+    background-color: #f0f2f5;
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+}
+
+.main-page-content {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 32px 16px;
+}
+
+/* 欢迎区 */
+.main-page-header {
+    margin-bottom: 32px;
+    text-align: center;
+}
+
+.main-page-header h1 {
+    font-size: 32px;
+    color: #333;
+    margin-bottom: 8px;
+}
+
+.main-page-subtitle {
+    font-size: 16px;
+    color: #666;
+}
+
+/* 卡片样式通用区 */
+.card-section {
+    background: #fff;
+    padding: 24px;
+    border-radius: 12px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
+    margin-bottom: 32px;
+}
+
+.section-title {
+    font-size: 22px;
+    font-weight: 600;
+    margin-bottom: 20px;
+    border-bottom: 1px solid #eaeaea;
+    padding-bottom: 10px;
+}
+
+/* 推荐资源占位样式 */
+.placeholder-box {
+    height: 150px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border: 2px dashed #ccc;
+    border-radius: 8px;
+    background-color: #fafafa;
+}
+
+.placeholder-text {
+    color: #999;
+    font-size: 16px;
+}
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