feat(frontend): update pages, components and branding

Refresh Astro frontend implementation including new pages (Portfolio, Teams, Services), components, and styling updates.

apps/frontend/src/sections/TeamsHero.astro

@@ -0,0 +1,95 @@
+---
+/**
+ * TeamsHero - Hero section for Teams page
+ * Pixel-perfect implementation based on Webflow design
+ */
+interface Props {
+  title?: string
+  subtitle?: string
+}
+
+const {
+  title = '恩群大本營',
+  subtitle = 'Team members of Enchun',
+} = Astro.props
+---
+
+<header class="hero-overlay-team">
+  <div class="centered-container w-container">
+    <div class="div-block">
+      <h1 class="hero_title_head-team">{title}</h1>
+      <p class="hero_sub_paragraph-team">{subtitle}</p>
+    </div>
+  </div>
+</header>
+
+<style>
+  /* Teams Hero Styles - Pixel-perfect from Webflow */
+  .hero-overlay-team {
+    background-color: var(--color-dark-blue);
+    padding: 120px 20px 80px;
+    text-align: center;
+  }
+
+  .centered-container {
+    max-width: 1200px;
+    margin: 0 auto;
+  }
+
+  .w-container {
+    max-width: 1200px;
+    margin: 0 auto;
+  }
+
+  .div-block {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+  }
+
+  .hero_title_head-team {
+    color: #ffffff;
+    font-family: "Noto Sans TC", sans-serif;
+    font-weight: 700;
+    font-size: 3.39em;
+    line-height: 1.2;
+    margin-bottom: 16px;
+  }
+
+  .hero_sub_paragraph-team {
+    color: var(--color-gray-100);
+    font-family: "Quicksand", "Noto Sans TC", sans-serif;
+    font-weight: 400;
+    font-size: 1.5em;
+    line-height: 1.2;
+  }
+
+  /* Responsive Adjustments */
+  @media (max-width: 991px) {
+    .hero-overlay-team {
+      padding: 80px 20px 60px;
+    }
+
+    .hero_title_head-team {
+      font-size: 2.45em;
+    }
+
+    .hero_sub_paragraph-team {
+      font-size: 1.15em;
+    }
+  }
+
+  @media (max-width: 767px) {
+    .hero-overlay-team {
+      padding: 60px 16px 40px;
+    }
+
+    .hero_title_head-team {
+      font-size: 7vw;
+    }
+
+    .hero_sub_paragraph-team {
+      font-size: 3.4vw;
+    }
+  }
+</style>