diff --git a/bun.lock b/bun.lock
index a439d57..ca53293 100644
--- a/bun.lock
+++ b/bun.lock
@@ -6,7 +6,6 @@
       "name": "github-gravity",
       "dependencies": {
         "@actions/core": "^3.0.0",
-        "@dimforge/rapier2d": "^0.19.3",
         "@dimforge/rapier2d-compat": "^0.19.3",
         "@kitajs/html": "^4.2.13",
         "opentype.js": "^2.0.0",
@@ -28,9 +27,6 @@
         "rollup": "^4.57.1",
         "typescript": "^5.9.3",
       },
-      "optionalDependencies": {
-        "@rollup/rollup-linux-x64-gnu": "*",
-      },
     },
   },
   "packages": {
@@ -98,8 +94,6 @@
 
     "@bufbuild/protoplugin": ["@bufbuild/protoplugin@2.16.0", "https://registry.npmmirror.com/@bufbuild/protoplugin/-/protoplugin-2.16.0.tgz", { "dependencies": { "@bufbuild/protobuf": "2.16.0", "@typescript/vfs": "^1.6.2", "typescript": "5.4.5" } }, "sha512-3FdYJys34VhFnBQsjiV9wurBkX/DBACQAkAk+nCKdO1p8ROVNi7gmaRAcba+4qq8hQq8rYVukuutwvGCvd4kJA=="],
 
-    "@dimforge/rapier2d": ["@dimforge/rapier2d@0.19.3", "https://registry.npmmirror.com/@dimforge/rapier2d/-/rapier2d-0.19.3.tgz", {}, "sha512-3dz6q3E3+Gbla1qje6/EhzlZ+nH/oQNpUASM4Mspk8DPPH7itxutpLJyvbu7Nci1aW1hhHp7eBZ3w3j45O5MiQ=="],
-
     "@dimforge/rapier2d-compat": ["@dimforge/rapier2d-compat@0.19.3", "https://registry.npmmirror.com/@dimforge/rapier2d-compat/-/rapier2d-compat-0.19.3.tgz", {}, "sha512-5HZUgiSpu9Uba3He+4SCPVte3h2vgxcodkxWThRjd3X/zgq/Z4OyRUKpNEOsOR6AC+OfulPkkZ5asZGzRMpcwA=="],
 
     "@esbuild/aix-ppc64": ["@esbuild/aix-ppc64@0.28.2", "https://registry.npmmirror.com/@esbuild/aix-ppc64/-/aix-ppc64-0.28.2.tgz", { "os": "aix", "cpu": "ppc64" }, "sha512-XExcO+dvLKvVtNTibSTBej1NCAbaGhWn9Ww1ZPx80qsahhPFe/8jgWP0IchNe0F3HwkU7n8ejhH8bjonqht8mQ=="],
diff --git a/dist/index.js b/dist/index.js
index c1f82cc..2d22b00 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -52873,9 +52873,6 @@ async function createWorld(width, height) {
 }
 /**
  * 计算所有字形的整体包围盒
- * @param textPaths
- * @param param1
- * @returns
  */
 function getTextBoundBox(textPaths, { width, height, textTop }) {
     let minX = Infinity, maxX = -Infinity, maxY = -Infinity;
diff --git a/package.json b/package.json
index 873263f..204f23f 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,6 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "^3.0.0",
-    "@dimforge/rapier2d": "^0.19.3",
     "@dimforge/rapier2d-compat": "^0.19.3",
     "@kitajs/html": "^4.2.13",
     "opentype.js": "^2.0.0",
@@ -67,8 +66,5 @@
     "pixi.js": "^8.22.0",
     "rollup": "^4.57.1",
     "typescript": "^5.9.3"
-  },
-  "optionalDependencies": {
-    "@rollup/rollup-linux-x64-gnu": "*"
   }
 }
diff --git a/src/utils/physics.ts b/src/utils/physics.ts
index 2c5d0c3..6d67bdf 100644
--- a/src/utils/physics.ts
+++ b/src/utils/physics.ts
@@ -179,9 +179,6 @@ export interface TextPathResult {
 
 /**
  * 计算所有字形的整体包围盒
- * @param textPaths
- * @param param1
- * @returns
  */
 export function getTextBoundBox(
   textPaths: TextPathResult[],
@@ -215,7 +212,6 @@ export function getTextBoundBox(
   }
 }
 
-/** 渲染用贡献方块：轨迹已统一为关键帧形态（未压缩时为无 span 的全量关键帧） */
 /** 渲染产物：模拟产出的贡献方块叠加压缩后的轨迹 */
 export interface RenderedContribution
   extends Omit<ContributionJson, 'trajectory'> {
@@ -247,8 +243,8 @@ export interface SimulationOptions {
   /** 字体大小 */
   fontSize?: number
   /**
-   * 轨迹压缩容差，单位 SVG 像素。播放时每个原始时刻的插值坐标与真实坐标
-   * 在横向、纵向上各自的偏差不超过该值
+   * 轨迹压缩容差，单位 SVG 坐标单位。播放时每个原始时刻的插值坐标与真实坐标
+   * 的偏差不超过该值（CSS 引擎按轴向、SMIL 按合成位移）
    */
   compressionTolerance?: number
   /** 禁用轨迹压缩，保留完整轨迹。调试用途，action无法禁用压缩 */