diff --git a/src/components/BottomNav.css b/src/components/BottomNav.css
new file mode 100644
index 0000000..3d84fc8
--- /dev/null
+++ b/src/components/BottomNav.css
@@ -0,0 +1,167 @@
+/* BottomNav — mobile bottom navigation */
+
+.bottom-nav {
+  display: none;
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  height: var(--bottom-nav-h);
+  padding-bottom: var(--safe-area-bottom);
+  background: var(--bg-secondary);
+  border-top: 1px solid var(--border-line);
+  backdrop-filter: blur(20px);
+  -webkit-backdrop-filter: blur(20px);
+  z-index: 300;
+  align-items: stretch;
+  justify-content: space-around;
+}
+
+@media (max-width: 768px) {
+  .bottom-nav {
+    display: flex;
+  }
+}
+
+/* Primary nav items */
+.bottom-nav__item {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  flex: 1;
+  min-width: 48px;
+  min-height: 48px;
+  gap: 3px;
+  color: var(--text-dim);
+  text-decoration: none;
+  font-family: var(--font-body);
+  font-size: 10px;
+  font-weight: 500;
+  letter-spacing: 0.02em;
+  transition: color 0.18s var(--ease-out);
+  -webkit-tap-highlight-color: transparent;
+  outline: none;
+  border: none;
+  background: none;
+  cursor: pointer;
+  padding: 4px 2px;
+}
+
+.bottom-nav__item:hover,
+.bottom-nav__item.is-active,
+.bottom-nav__item--active {
+  color: var(--neon-cyan);
+}
+
+.bottom-nav__item:hover .bottom-nav__icon,
+.bottom-nav__item.is-active .bottom-nav__icon,
+.bottom-nav__item--active .bottom-nav__icon {
+  filter: drop-shadow(0 0 6px var(--neon-cyan-dim));
+}
+
+/* Icon wrapper */
+.bottom-nav__icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 22px;
+  height: 22px;
+  flex-shrink: 0;
+  transition: filter 0.18s var(--ease-out);
+}
+
+.bottom-nav__icon svg,
+.bottom-nav__icon > * {
+  width: 22px;
+  height: 22px;
+}
+
+/* Label */
+.bottom-nav__label {
+  line-height: 1;
+  white-space: nowrap;
+}
+
+/* ---- More overlay backdrop ---- */
+.bottom-nav__more-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.55);
+  backdrop-filter: blur(4px);
+  -webkit-backdrop-filter: blur(4px);
+  z-index: 298;
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 0.22s var(--ease-out);
+}
+
+.bottom-nav__more-overlay.is-open {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+/* ---- More panel ---- */
+.bottom-nav__more-panel {
+  position: fixed;
+  bottom: calc(var(--bottom-nav-h) + var(--safe-area-bottom));
+  left: 0;
+  right: 0;
+  z-index: 299;
+  padding: 16px 12px 12px;
+  background: var(--surface-raised);
+  border-top: 1px solid var(--border-line);
+  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 10px;
+  transform: translateY(100%);
+  transition: transform 0.25s var(--ease-out);
+}
+
+.bottom-nav__more-panel.is-open {
+  transform: translateY(0);
+}
+
+/* More panel item */
+.bottom-nav__more-item {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  padding: 12px 4px;
+  color: var(--text-dim);
+  text-decoration: none;
+  font-family: var(--font-body);
+  font-size: 11px;
+  font-weight: 500;
+  background: var(--surface);
+  border: 1px solid var(--border-line);
+  border-radius: var(--radius-md);
+  transition: color 0.18s var(--ease-out), border-color 0.18s var(--ease-out);
+  -webkit-tap-highlight-color: transparent;
+  cursor: pointer;
+}
+
+.bottom-nav__more-item:hover,
+.bottom-nav__more-item.is-active {
+  color: var(--neon-cyan);
+  border-color: var(--neon-cyan-dim);
+}
+
+.bottom-nav__more-item:hover .bottom-nav__icon,
+.bottom-nav__more-item.is-active .bottom-nav__icon {
+  filter: drop-shadow(0 0 6px var(--neon-cyan-dim));
+}
+
+/* Reduce motion */
+@media (prefers-reduced-motion: reduce) {
+  .bottom-nav__item,
+  .bottom-nav__icon,
+  .bottom-nav__more-overlay,
+  .bottom-nav__more-panel,
+  .bottom-nav__more-item {
+    transition: none;
+  }
+}
diff --git a/src/components/BottomNav.jsx b/src/components/BottomNav.jsx
new file mode 100644
index 0000000..258be6f
--- /dev/null
+++ b/src/components/BottomNav.jsx
@@ -0,0 +1,114 @@
+import { useState, useCallback } from 'react';
+import { NavLink, useLocation } from 'react-router-dom';
+import { navLinks } from '../routes';
+import './BottomNav.css';
+
+const PRIMARY_PATHS = ['/', '/lotto', '/stock', '/travel'];
+
+// Vertical dots (three circles) icon for "more"
+function MoreDotsIcon() {
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      width="22"
+      height="22"
+      viewBox="0 0 22 22"
+      fill="currentColor"
+      aria-hidden="true"
+    >
+      <circle cx="11" cy="4.5" r="1.8" />
+      <circle cx="11" cy="11" r="1.8" />
+      <circle cx="11" cy="17.5" r="1.8" />
+    </svg>
+  );
+}
+
+const primaryLinks = navLinks.filter((link) =>
+  PRIMARY_PATHS.includes(link.path)
+);
+// Preserve the order defined in PRIMARY_PATHS
+const orderedPrimaryLinks = PRIMARY_PATHS.map((p) =>
+  primaryLinks.find((l) => l.path === p)
+).filter(Boolean);
+
+const moreLinks = navLinks.filter(
+  (link) => !PRIMARY_PATHS.includes(link.path)
+);
+
+export default function BottomNav() {
+  const [moreOpen, setMoreOpen] = useState(false);
+  const location = useLocation();
+
+  const openMore = useCallback(() => setMoreOpen(true), []);
+  const closeMore = useCallback(() => setMoreOpen(false), []);
+  const toggleMore = useCallback(() => setMoreOpen((prev) => !prev), []);
+
+  // Highlight the "more" button when the current path belongs to moreLinks
+  const isMoreActive =
+    moreOpen || moreLinks.some((link) => location.pathname === link.path);
+
+  return (
+    <>
+      {/* Backdrop */}
+      <div
+        className={`bottom-nav__more-overlay${moreOpen ? ' is-open' : ''}`}
+        onClick={closeMore}
+        aria-hidden="true"
+      />
+
+      {/* More panel */}
+      <div
+        className={`bottom-nav__more-panel${moreOpen ? ' is-open' : ''}`}
+        role="menu"
+        aria-label="더보기 메뉴"
+      >
+        {moreLinks.map((link) => (
+          <NavLink
+            key={link.id}
+            to={link.path}
+            className={({ isActive }) =>
+              `bottom-nav__more-item${isActive ? ' is-active' : ''}`
+            }
+            onClick={closeMore}
+            role="menuitem"
+          >
+            <span className="bottom-nav__icon">{link.icon}</span>
+            <span className="bottom-nav__label">{link.label}</span>
+          </NavLink>
+        ))}
+      </div>
+
+      {/* Bottom nav bar */}
+      <nav className="bottom-nav" aria-label="하단 내비게이션">
+        {orderedPrimaryLinks.map((link) => (
+          <NavLink
+            key={link.id}
+            to={link.path}
+            end={link.path === '/'}
+            className={({ isActive }) =>
+              `bottom-nav__item${isActive ? ' is-active' : ''}`
+            }
+          >
+            <span className="bottom-nav__icon">{link.icon}</span>
+            <span className="bottom-nav__label">{link.label}</span>
+          </NavLink>
+        ))}
+
+        {/* More button */}
+        <button
+          type="button"
+          className={`bottom-nav__item${isMoreActive ? ' is-active' : ''}`}
+          onClick={toggleMore}
+          aria-expanded={moreOpen}
+          aria-haspopup="menu"
+          aria-label="더보기"
+        >
+          <span className="bottom-nav__icon">
+            <MoreDotsIcon />
+          </span>
+          <span className="bottom-nav__label">더보기</span>
+        </button>
+      </nav>
+    </>
+  );
+}