diff --git a/config.conf b/config.conf
index 353bdab..59e4631 100644
--- a/config.conf
+++ b/config.conf
@@ -42,10 +42,12 @@ animation_duration_move=500
 animation_duration_open=400
 animation_duration_tag=350
 animation_duration_close=800
+animation_duration_focus=0
 animation_curve_open=0.46,1.0,0.29,1
 animation_curve_move=0.46,1.0,0.29,1
 animation_curve_tag=0.46,1.0,0.29,1
 animation_curve_close=0.08,0.92,0,1
+animation_curve_focus=0.46,1.0,0.29,1
 
 # Scroller Layout Setting
 scroller_structs=20
diff --git a/src/animation/client.h b/src/animation/client.h
index c53638e..56a40d5 100644
--- a/src/animation/client.h
+++ b/src/animation/client.h
@@ -225,12 +225,6 @@ void scene_buffer_apply_effect(struct wlr_scene_buffer *buffer, int sx, int sy,
 
 	wlr_scene_buffer_set_corner_radius(buffer, border_radius,
 									   buffer_data->corner_location);
-
-	float target_opacity = buffer_data->percent + fadein_begin_opacity;
-	if (target_opacity > buffer_data->opacity) {
-		target_opacity = buffer_data->opacity;
-	}
-	wlr_scene_buffer_set_opacity(buffer, target_opacity);
 }
 
 void buffer_set_effect(Client *c, BufferData data) {
@@ -517,7 +511,6 @@ void client_apply_clip(Client *c, float factor) {
 	bool should_render_client_surface = false;
 	struct ivec2 offset;
 	BufferData buffer_data;
-	float opacity, percent;
 
 	enum corner_location current_corner_location =
 		set_client_corner_location(c);
@@ -537,29 +530,17 @@ void client_apply_clip(Client *c, float factor) {
 		apply_border(c);
 		client_draw_shadow(c);
 
-		opacity = c->isfullscreen	 ? 1
-				  : c == selmon->sel ? c->focused_opacity
-									 : c->unfocused_opacity;
-
 		if (clip_box.width <= 0 || clip_box.height <= 0) {
 			return;
 		}
 
 		wlr_scene_subsurface_tree_set_clip(&c->scene_surface->node, &clip_box);
 		buffer_set_effect(c, (BufferData){1.0f, 1.0f, clip_box.width,
-										  clip_box.height, opacity, opacity,
+										  clip_box.height,
 										  current_corner_location, true});
 		return;
 	}
 
-	percent =
-		c->animation.action == OPEN && animation_fade_in && !c->nofadein
-			? (double)c->animation.passed_frames / c->animation.total_frames
-			: 1.0;
-	opacity = c->isfullscreen	 ? 1
-			  : c == selmon->sel ? c->focused_opacity
-								 : c->unfocused_opacity;
-
 	// 获取窗口动画实时位置矩形
 	unsigned int width, height;
 	client_actual_size(c, &width, &height);
@@ -614,8 +595,6 @@ void client_apply_clip(Client *c, float factor) {
 	buffer_data.width = clip_box.width;
 	buffer_data.height = clip_box.height;
 	buffer_data.corner_location = current_corner_location;
-	buffer_data.percent = percent;
-	buffer_data.opacity = opacity;
 
 	if (factor == 1.0) {
 		buffer_data.width_scale = 1.0;
@@ -1048,22 +1027,128 @@ bool client_draw_fadeout_frame(Client *c) {
 	return true;
 }
 
+void client_set_focused_opacity_animation(Client *c) {
+	float *border_color = get_border_color(c);
+	memcpy(c->opacity_animation.target_border_color, border_color,
+		   sizeof(c->opacity_animation.target_border_color));
+	c->opacity_animation.target_opacity = c->focused_opacity;
+	c->opacity_animation.total_frames =
+		animation_duration_focus / all_output_frame_duration_ms();
+	c->opacity_animation.passed_frames = 0;
+	if (c->opacity_animation.running) {
+		memcpy(c->opacity_animation.initial_border_color,
+			   c->opacity_animation.current_border_color,
+			   sizeof(c->opacity_animation.initial_border_color));
+		c->opacity_animation.initial_opacity =
+			c->opacity_animation.current_opacity;
+	} else {
+		memcpy(c->opacity_animation.initial_border_color, border_color,
+			   sizeof(c->opacity_animation.initial_border_color));
+		c->opacity_animation.initial_opacity = c->unfocused_opacity;
+	}
+	c->opacity_animation.running = true;
+}
+
+void cleint_set_unfocused_opacity_animation(Client *c) {
+	// Start border color animation to unfocused
+	float *border_color = get_border_color(c);
+	memcpy(c->opacity_animation.target_border_color, border_color,
+		   sizeof(c->opacity_animation.target_border_color));
+	// Start opacity animation to unfocused
+	c->opacity_animation.target_opacity = c->unfocused_opacity;
+	c->opacity_animation.total_frames =
+		animation_duration_focus / all_output_frame_duration_ms();
+	c->opacity_animation.passed_frames = 0;
+
+	if (c->opacity_animation.running) {
+		memcpy(c->opacity_animation.initial_border_color,
+			   c->opacity_animation.current_border_color,
+			   sizeof(c->opacity_animation.initial_border_color));
+		c->opacity_animation.initial_opacity =
+			c->opacity_animation.current_opacity;
+	} else {
+		memcpy(c->opacity_animation.initial_border_color, border_color,
+			   sizeof(c->opacity_animation.initial_border_color));
+		c->opacity_animation.initial_opacity = c->focused_opacity;
+	}
+
+	c->opacity_animation.running = true;
+}
+
+bool client_apply_focus_opacity(Client *c) {
+	// Animate focus transitions (opacity + border color)
+	float *border_color = get_border_color(c);
+	if (c->isfullscreen) {
+		c->opacity_animation.running = false;
+		client_set_opacity(c, 1);
+	} else if (c->animation.running && c->animation.action == OPEN) {
+		c->opacity_animation.running = false;
+		float percent =
+			animation_fade_in && !c->nofadein
+				? (double)c->animation.passed_frames / c->animation.total_frames
+				: 1.0;
+		float opacity = c->isfullscreen	   ? 1
+						: c == selmon->sel ? c->focused_opacity
+										   : c->unfocused_opacity;
+
+		float target_opacity = percent + fadein_begin_opacity;
+		if (target_opacity > opacity) {
+			target_opacity = opacity;
+		}
+		client_set_opacity(c, target_opacity);
+	} else if (animations && c->opacity_animation.running) {
+		float linear_progress = (float)c->opacity_animation.passed_frames /
+								c->opacity_animation.total_frames;
+		float eased_progress = find_animation_curve_at(linear_progress, FOCUS);
+
+		c->opacity_animation.current_opacity =
+			c->opacity_animation.initial_opacity +
+			(c->opacity_animation.target_opacity -
+			 c->opacity_animation.initial_opacity) *
+				eased_progress;
+		client_set_opacity(c, c->opacity_animation.current_opacity);
+
+		// Animate border color
+		for (int i = 0; i < 4; i++) {
+			c->opacity_animation.current_border_color[i] =
+				c->opacity_animation.initial_border_color[i] +
+				(c->opacity_animation.target_border_color[i] -
+				 c->opacity_animation.initial_border_color[i]) *
+					eased_progress;
+		}
+		client_set_border_color(c, c->opacity_animation.current_border_color);
+		if (linear_progress == 1.0f) {
+			c->opacity_animation.running = false;
+		} else {
+			c->opacity_animation.passed_frames++;
+			return true;
+		}
+	} else if (c == selmon->sel) {
+		c->opacity_animation.running = false;
+		c->opacity_animation.current_opacity = c->focused_opacity;
+		memcpy(c->opacity_animation.current_border_color, border_color,
+			   sizeof(c->opacity_animation.current_border_color));
+		client_set_opacity(c, c->focused_opacity);
+	} else {
+		c->opacity_animation.running = false;
+		c->opacity_animation.current_opacity = c->unfocused_opacity;
+		memcpy(c->opacity_animation.current_border_color, border_color,
+			   sizeof(c->opacity_animation.current_border_color));
+		client_set_opacity(c, c->unfocused_opacity);
+	}
+
+	return false;
+}
+
 bool client_draw_frame(Client *c) {
 
 	if (!c || !client_surface(c)->mapped)
 		return false;
 
-	if (c->isfullscreen) {
-		client_set_opacity(c, 1);
-	} else if (c == selmon->sel && !c->animation.running) {
-		client_set_opacity(c, c->focused_opacity);
-	} else if (!c->animation.running) {
-		client_set_opacity(c, c->unfocused_opacity);
+	if (!c->need_output_flush) {
+		return client_apply_focus_opacity(c);
 	}
 
-	if (!c->need_output_flush)
-		return false;
-
 	if (animations && c->animation.running) {
 		client_animation_next_tick(c);
 	} else {
@@ -1074,5 +1159,6 @@ bool client_draw_frame(Client *c) {
 		client_apply_clip(c, 1.0);
 		c->need_output_flush = false;
 	}
+	client_apply_focus_opacity(c);
 	return true;
 }
diff --git a/src/animation/common.h b/src/animation/common.h
index edd7517..edd39b0 100644
--- a/src/animation/common.h
+++ b/src/animation/common.h
@@ -9,6 +9,8 @@ struct dvec2 calculate_animation_curve_at(double t, int type) {
 		animation_curve = animation_curve_tag;
 	} else if (type == CLOSE) {
 		animation_curve = animation_curve_close;
+	} else if (type == FOCUS) {
+		animation_curve = animation_curve_focus;
 	} else {
 		animation_curve = animation_curve_move;
 	}
@@ -28,6 +30,8 @@ void init_baked_points(void) {
 	baked_points_tag = calloc(BAKED_POINTS_COUNT, sizeof(*baked_points_tag));
 	baked_points_close =
 		calloc(BAKED_POINTS_COUNT, sizeof(*baked_points_close));
+	baked_points_focus =
+		calloc(BAKED_POINTS_COUNT, sizeof(*baked_points_focus));
 
 	for (unsigned int i = 0; i < BAKED_POINTS_COUNT; i++) {
 		baked_points_move[i] = calculate_animation_curve_at(
@@ -45,6 +49,10 @@ void init_baked_points(void) {
 		baked_points_close[i] = calculate_animation_curve_at(
 			(double)i / (BAKED_POINTS_COUNT - 1), CLOSE);
 	}
+	for (unsigned int i = 0; i < BAKED_POINTS_COUNT; i++) {
+		baked_points_focus[i] = calculate_animation_curve_at(
+			(double)i / (BAKED_POINTS_COUNT - 1), FOCUS);
+	}
 }
 
 double find_animation_curve_at(double t, int type) {
@@ -61,6 +69,8 @@ double find_animation_curve_at(double t, int type) {
 		baked_points = baked_points_tag;
 	} else if (type == CLOSE) {
 		baked_points = baked_points_close;
+	} else if (type == FOCUS) {
+		baked_points = baked_points_focus;
 	} else {
 		baked_points = baked_points_move;
 	}
diff --git a/src/config/parse_config.h b/src/config/parse_config.h
index 405ae93..97db321 100644
--- a/src/config/parse_config.h
+++ b/src/config/parse_config.h
@@ -178,10 +178,12 @@ typedef struct {
 	uint32_t animation_duration_open;
 	uint32_t animation_duration_tag;
 	uint32_t animation_duration_close;
+	uint32_t animation_duration_focus;
 	double animation_curve_move[4];
 	double animation_curve_open[4];
 	double animation_curve_tag[4];
 	double animation_curve_close[4];
+	double animation_curve_focus[4];
 
 	int scroller_structs;
 	float scroller_default_proportion;
@@ -1130,6 +1132,8 @@ void parse_option(Config *config, char *key, char *value) {
 		config->animation_duration_tag = atoi(value);
 	} else if (strcmp(key, "animation_duration_close") == 0) {
 		config->animation_duration_close = atoi(value);
+	} else if (strcmp(key, "animation_duration_focus") == 0) {
+		config->animation_duration_focus = atoi(value);
 	} else if (strcmp(key, "animation_curve_move") == 0) {
 		int num = parse_double_array(value, config->animation_curve_move, 4);
 		if (num != 4) {
@@ -1155,6 +1159,13 @@ void parse_option(Config *config, char *key, char *value) {
 					"Error: Failed to parse animation_curve_close: %s\n",
 					value);
 		}
+	} else if (strcmp(key, "animation_curve_focus") == 0) {
+		int num = parse_double_array(value, config->animation_curve_focus, 4);
+		if (num != 4) {
+			fprintf(stderr,
+					"Error: Failed to parse animation_curve_focus: %s\n",
+					value);
+		}
 	} else if (strcmp(key, "scroller_structs") == 0) {
 		config->scroller_structs = atoi(value);
 	} else if (strcmp(key, "scroller_default_proportion") == 0) {
@@ -2593,6 +2604,8 @@ void override_config(void) {
 	animation_duration_tag = CLAMP_INT(config.animation_duration_tag, 1, 50000);
 	animation_duration_close =
 		CLAMP_INT(config.animation_duration_close, 1, 50000);
+	animation_duration_focus =
+		CLAMP_INT(config.animation_duration_focus, 1, 50000);
 
 	// 滚动布局设置
 	scroller_default_proportion =
@@ -2725,6 +2738,8 @@ void override_config(void) {
 		   sizeof(animation_curve_tag));
 	memcpy(animation_curve_close, config.animation_curve_close,
 		   sizeof(animation_curve_close));
+	memcpy(animation_curve_focus, config.animation_curve_focus,
+		   sizeof(animation_curve_focus));
 }
 
 void set_value_default() {
@@ -2747,6 +2762,8 @@ void set_value_default() {
 		animation_duration_tag; // Animation tag speed
 	config.animation_duration_close =
 		animation_duration_close; // Animation tag speed
+	config.animation_duration_focus =
+		animation_duration_focus; // Animation focus opacity speed
 
 	/* appearance */
 	config.axis_bind_apply_timeout =
@@ -2864,6 +2881,8 @@ void set_value_default() {
 		   sizeof(animation_curve_tag));
 	memcpy(config.animation_curve_close, animation_curve_close,
 		   sizeof(animation_curve_close));
+	memcpy(config.animation_curve_focus, animation_curve_focus,
+		   sizeof(animation_curve_focus));
 
 	memcpy(config.rootcolor, rootcolor, sizeof(rootcolor));
 	memcpy(config.bordercolor, bordercolor, sizeof(bordercolor));
diff --git a/src/config/preset.h b/src/config/preset.h
index d9425a7..39cf509 100644
--- a/src/config/preset.h
+++ b/src/config/preset.h
@@ -25,10 +25,12 @@ uint32_t animation_duration_move = 500;	 // Animation move speed
 uint32_t animation_duration_open = 400;	 // Animation open speed
 uint32_t animation_duration_tag = 300;	 // Animation tag speed
 uint32_t animation_duration_close = 300; // Animation close speed
+uint32_t animation_duration_focus = 0;	 // Animation focus opacity speed
 double animation_curve_move[4] = {0.46, 1.0, 0.29, 0.99};  // 动画曲线
 double animation_curve_open[4] = {0.46, 1.0, 0.29, 0.99};  // 动画曲线
 double animation_curve_tag[4] = {0.46, 1.0, 0.29, 0.99};   // 动画曲线
 double animation_curve_close[4] = {0.46, 1.0, 0.29, 0.99}; // 动画曲线
+double animation_curve_focus[4] = {0.46, 1.0, 0.29, 0.99}; // 动画曲线
 
 /* appearance */
 unsigned int axis_bind_apply_timeout = 100; // 滚轮绑定动作的触发的时间间隔
diff --git a/src/fetch/client.h b/src/fetch/client.h
index ce93a3b..6e67522 100644
--- a/src/fetch/client.h
+++ b/src/fetch/client.h
@@ -372,3 +372,21 @@ Client *get_next_stack_client(Client *c, bool reverse) {
 	}
 	return NULL;
 }
+
+float *get_border_color(Client *c) {
+	if (c->isurgent) {
+		return urgentcolor;
+	} else if (c->is_in_scratchpad && selmon && c == selmon->sel) {
+		return scratchpadcolor;
+	} else if (c->isglobal && selmon && c == selmon->sel) {
+		return globalcolor;
+	} else if (c->isoverlay && selmon && c == selmon->sel) {
+		return overlaycolor;
+	} else if (c->ismaximizescreen && selmon && c == selmon->sel) {
+		return maximizescreencolor;
+	} else if (selmon && c == selmon->sel) {
+		return focuscolor;
+	} else {
+		return bordercolor;
+	}
+}
\ No newline at end of file
diff --git a/src/mango.c b/src/mango.c
index 6602a8d..412a27f 100644
--- a/src/mango.c
+++ b/src/mango.c
@@ -161,7 +161,7 @@ enum {
 }; /* EWMH atoms */
 #endif
 enum { UP, DOWN, LEFT, RIGHT, UNDIR }; /* smartmovewin */
-enum { NONE, OPEN, MOVE, CLOSE, TAG };
+enum { NONE, OPEN, MOVE, CLOSE, TAG, FOCUS };
 enum { UNFOLD, FOLD, INVALIDFOLD };
 enum { PREV, NEXT };
 
@@ -239,13 +239,23 @@ struct dwl_animation {
 	int action;
 };
 
+struct dwl_opacity_animation {
+	bool running;
+	float current_opacity;
+	float target_opacity;
+	float initial_opacity;
+	unsigned int total_frames;
+	unsigned int passed_frames;
+	float current_border_color[4];
+	float target_border_color[4];
+	float initial_border_color[4];
+};
+
 typedef struct {
 	float width_scale;
 	float height_scale;
 	int width;
 	int height;
-	double percent;
-	float opacity;
 	enum corner_location corner_location;
 	bool should_scale;
 } BufferData;
@@ -324,6 +334,7 @@ struct Client {
 	float scroller_proportion;
 	bool need_output_flush;
 	struct dwl_animation animation;
+	struct dwl_opacity_animation opacity_animation;
 	int isterm, noswallow;
 	int allow_csd;
 	int force_maximize;
@@ -692,6 +703,8 @@ static void resize_tile_client(Client *grabc, bool isdrag, int offsetx,
 							   int offsety, unsigned int time);
 static void refresh_monitors_workspaces_status(Monitor *m);
 static void init_client_properties(Client *c);
+static bool check_keyboard_rules_validate(struct xkb_rule_names *rules);
+static float *get_border_color(Client *c);
 static void request_fresh_all_monitors(void);
 
 #include "data/static_keymap.h"
@@ -777,6 +790,7 @@ struct dvec2 *baked_points_move;
 struct dvec2 *baked_points_open;
 struct dvec2 *baked_points_tag;
 struct dvec2 *baked_points_close;
+struct dvec2 *baked_points_focus;
 
 static struct wl_event_source *hide_source;
 static bool cursor_hidden = false;
@@ -3075,6 +3089,12 @@ void focusclient(Client *c, int lift) {
 		selmon->prevsel = selmon->sel;
 		selmon->sel = c;
 
+		if (selmon->prevsel && !selmon->prevsel->iskilling) {
+			cleint_set_unfocused_opacity_animation(selmon->prevsel);
+		}
+
+		client_set_focused_opacity_animation(c);
+
 		// decide whether need to re-arrange
 
 		if (c && selmon->prevsel &&
@@ -3091,7 +3111,6 @@ void focusclient(Client *c, int lift) {
 
 		// change border color
 		c->isurgent = 0;
-		setborder_color(c);
 	}
 
 	if (c && !c->iskilling && c->foreign_toplevel)
@@ -3119,18 +3138,17 @@ void focusclient(Client *c, int lift) {
 			 * probably other clients */
 		} else if (w && !client_is_unmanaged(w) &&
 				   (!c || !client_wants_focus(c))) {
-			setborder_color(w);
-
 			client_activate_surface(old_keyboard_focus_surface, 0);
 		}
 	}
 	printstatus();
 
 	if (!c) {
-		/* With no client, all we have left is to clear focus */
-		if (selmon && selmon->sel)
-			selmon->sel =
-				NULL; // 这个很关键,因为很多地方用到当前窗口做计算,不重置成NULL就会到处有野指针
+
+		if (selmon && selmon->sel &&
+			(!VISIBLEON(selmon->sel, selmon) || selmon->sel->iskilling ||
+			 !client_surface(selmon->sel)->mapped))
+			selmon->sel = NULL;
 
 		// clear text input focus state
 		dwl_im_relay_set_focus(dwl_input_method_relay, NULL);
@@ -4127,23 +4145,11 @@ void requeststartdrag(struct wl_listener *listener, void *data) {
 void setborder_color(Client *c) {
 	if (!c || !c->mon)
 		return;
-	if (c->isurgent) {
-		client_set_border_color(c, urgentcolor);
-		return;
-	}
-	if (c->is_in_scratchpad && selmon && c == selmon->sel) {
-		client_set_border_color(c, scratchpadcolor);
-	} else if (c->isglobal && selmon && c == selmon->sel) {
-		client_set_border_color(c, globalcolor);
-	} else if (c->isoverlay && selmon && c == selmon->sel) {
-		client_set_border_color(c, overlaycolor);
-	} else if (c->ismaximizescreen && selmon && c == selmon->sel) {
-		client_set_border_color(c, maximizescreencolor);
-	} else if (selmon && c == selmon->sel) {
-		client_set_border_color(c, focuscolor);
-	} else {
-		client_set_border_color(c, bordercolor);
-	}
+
+	float *border_color = get_border_color(c);
+	memcpy(c->opacity_animation.target_border_color, border_color,
+		   sizeof(c->opacity_animation.target_border_color));
+	client_set_border_color(c, border_color);
 }
 
 void exchange_two_client(Client *c1, Client *c2) {
@@ -5401,9 +5407,9 @@ urgent(struct wl_listener *listener, void *data) {
 			view_in_mon(&(Arg){.ui = c->tags}, true, c->mon, true);
 		focusclient(c, 1);
 	} else if (c != focustop(selmon)) {
-		if (client_surface(c)->mapped)
-			client_set_border_color(c, urgentcolor);
 		c->isurgent = 1;
+		if (client_surface(c)->mapped)
+			setborder_color(c);
 		printstatus();
 	}
 }
@@ -5552,7 +5558,7 @@ void activatex11(struct wl_listener *listener, void *data) {
 	} else if (c != focustop(selmon)) {
 		c->isurgent = 1;
 		if (client_surface(c)->mapped)
-			client_set_border_color(c, urgentcolor);
+			setborder_color(c);
 	}
 
 	if (need_arrange) {
@@ -5634,7 +5640,7 @@ void sethints(struct wl_listener *listener, void *data) {
 	printstatus();
 
 	if (c->isurgent && surface && surface->mapped)
-		client_set_border_color(c, urgentcolor);
+		setborder_color(c);
 }
 
 void xwaylandready(struct wl_listener *listener, void *data) {