diff --git a/apps/web/components/chain/ChainAdjudication.tsx b/apps/web/components/chain/ChainAdjudication.tsx
index 4de70df..abed663 100644
--- a/apps/web/components/chain/ChainAdjudication.tsx
+++ b/apps/web/components/chain/ChainAdjudication.tsx
@@ -4,6 +4,7 @@ import { useCallback, useEffect, useState } from "react";
 
 import { ConflictCard } from "@/components/review/ConflictCard";
 import { useToast } from "@/components/Toast";
+import { Button } from "@/components/ui/Button";
 import { api } from "@/lib/api/client";
 import { buildResumeRequest } from "@/lib/chain/chain";
 import { friendlyFromApiError } from "@/lib/errors/messages";
@@ -159,14 +160,14 @@ export function ChainAdjudication({
         </ul>
       )}
 
-      <button
-        type="button"
+      <Button
+        variant="primary"
         onClick={() => void onResume()}
         disabled={resuming || !allResolved(drafts)}
-        className="self-start rounded bg-cinnabar px-4 py-2 text-sm text-white disabled:opacity-50"
+        className="self-start"
       >
         {resuming ? "续跑中…" : "裁决完成，续跑"}
-      </button>
+      </Button>
       {pending.length > 0 ? (
         <p className="text-xs text-conflict">
           还有 {pending.length} 条冲突未裁决。
diff --git a/apps/web/components/chain/ChainProgress.tsx b/apps/web/components/chain/ChainProgress.tsx
index b8b68e5..480db14 100644
--- a/apps/web/components/chain/ChainProgress.tsx
+++ b/apps/web/components/chain/ChainProgress.tsx
@@ -1,5 +1,6 @@
 "use client";
 
+import { Card } from "@/components/ui/Card";
 import type { ChainPhase, ChainResultView } from "@/lib/chain/chain";
 
 interface ChainProgressProps {
@@ -18,8 +19,9 @@ const PHASE_LABEL: Record<ChainPhase, string> = {
 // 链进度视图：相位徽标 + 进度条 + 已写章号清单（token/正文绝不展示，result 只含元数据）。
 export function ChainProgress({ phase, progress, result }: ChainProgressProps) {
   return (
-    <section
-      className="flex flex-col gap-3 rounded border border-line bg-panel p-5"
+    <Card
+      as="section"
+      className="flex flex-col gap-3 p-5"
       aria-label="链进度"
     >
       <div className="flex items-center justify-between gap-3">
@@ -58,6 +60,6 @@ export function ChainProgress({ phase, progress, result }: ChainProgressProps) {
           第 {result.awaitingChapter} 章存在未决冲突，请在下方逐条裁决后续跑。
         </p>
       ) : null}
-    </section>
+    </Card>
   );
 }
diff --git a/apps/web/components/foreshadow/ForeshadowBoard.tsx b/apps/web/components/foreshadow/ForeshadowBoard.tsx
index 21a73a6..8818295 100644
--- a/apps/web/components/foreshadow/ForeshadowBoard.tsx
+++ b/apps/web/components/foreshadow/ForeshadowBoard.tsx
@@ -6,6 +6,7 @@ import { Flag, Plus } from "lucide-react";
 import { AppShell } from "@/components/AppShell";
 import { Badge } from "@/components/ui/Badge";
 import { Button } from "@/components/ui/Button";
+import { Card } from "@/components/ui/Card";
 import { EmptyState } from "@/components/ui/EmptyState";
 import { PageHeader } from "@/components/ui/PageHeader";
 import type { ForeshadowView, ProjectResponse } from "@/lib/api/types";
@@ -137,10 +138,7 @@ function ForeshadowBoardSummary({
       className="mb-3 grid grid-cols-2 gap-2 sm:grid-cols-4"
     >
       {LANES.map((status) => (
-        <div
-          key={status}
-          className="rounded border border-line bg-panel px-3 py-2"
-        >
+        <Card key={status} className="px-3 py-2">
           <div className="flex items-center justify-between gap-2">
             <Badge variant={SUMMARY_VARIANTS[status]}>
               {LANE_LABELS[status]}
@@ -152,7 +150,7 @@ function ForeshadowBoardSummary({
             {" · "}
             {total > 0 ? `${Math.round((counts[status] / total) * 100)}%` : "0%"}
           </p>
-        </div>
+        </Card>
       ))}
     </section>
   );
diff --git a/apps/web/components/foreshadow/RegisterForm.tsx b/apps/web/components/foreshadow/RegisterForm.tsx
index e9728eb..99c00db 100644
--- a/apps/web/components/foreshadow/RegisterForm.tsx
+++ b/apps/web/components/foreshadow/RegisterForm.tsx
@@ -5,6 +5,7 @@ import { Plus } from "lucide-react";
 
 import { Button } from "@/components/ui/Button";
 import { TextInput } from "@/components/ui/TextInput";
+import { cardClass } from "@/lib/ui/variants";
 import type { RegisterInput } from "@/lib/foreshadow/board";
 
 interface RegisterFormProps {
@@ -79,7 +80,7 @@ export function RegisterForm({
         e.preventDefault();
         void submit();
       }}
-      className="rounded border border-line bg-panel p-4"
+      className={cardClass("p-4")}
     >
       <div className="grid grid-cols-2 gap-3 sm:grid-cols-3">
         <FormSlot label="代号 *" id="f-code">
diff --git a/apps/web/components/generation/ConflictAdjudication.tsx b/apps/web/components/generation/ConflictAdjudication.tsx
index b3cb3e8..908fab5 100644
--- a/apps/web/components/generation/ConflictAdjudication.tsx
+++ b/apps/web/components/generation/ConflictAdjudication.tsx
@@ -1,5 +1,6 @@
 "use client";
 
+import { Button } from "@/components/ui/Button";
 import type { IngestConflicts } from "@/lib/generation/cards";
 
 interface ConflictAdjudicationProps {
@@ -56,22 +57,22 @@ export function ConflictAdjudication({
         ))}
       </ul>
       <div className="flex gap-2">
-        <button
+        <Button
           type="button"
+          variant="danger"
           onClick={onAcknowledge}
           disabled={busy}
-          className="rounded bg-conflict px-3 py-1.5 text-sm text-white disabled:opacity-50"
         >
           已知悉，强制入库
-        </button>
-        <button
+        </Button>
+        <Button
           type="button"
+          variant="secondary"
           onClick={onCancel}
           disabled={busy}
-          className="rounded border border-line px-3 py-1.5 text-sm text-ink disabled:opacity-50"
         >
           取消，回去改卡
-        </button>
+        </Button>
       </div>
     </div>
   );
diff --git a/apps/web/components/projects/ProjectLibrary.tsx b/apps/web/components/projects/ProjectLibrary.tsx
index e9252e8..6d61727 100644
--- a/apps/web/components/projects/ProjectLibrary.tsx
+++ b/apps/web/components/projects/ProjectLibrary.tsx
@@ -16,7 +16,7 @@ import {
   type ProjectSort,
   type ProjectViewMode,
 } from "@/lib/projects/projects";
-import { buttonClass, cn } from "@/lib/ui/variants";
+import { buttonClass, cardClass, cn } from "@/lib/ui/variants";
 
 interface ProjectLibraryProps {
   projects: ProjectResponse[];
@@ -47,7 +47,11 @@ export function ProjectLibrary({ projects }: ProjectLibraryProps) {
 
   return (
     <div className="space-y-4">
-      <div className="grid gap-3 rounded border border-line bg-panel p-3 md:grid-cols-[1fr_auto_auto_auto] md:items-center">
+      <div
+        className={cardClass(
+          "grid gap-3 p-3 md:grid-cols-[1fr_auto_auto_auto] md:items-center",
+        )}
+      >
         <label className="relative block">
           <span className="sr-only">搜索作品</span>
           <Search
@@ -155,7 +159,10 @@ export function ProjectLibrary({ projects }: ProjectLibraryProps) {
           <li>
             <Link
               href="/projects/new"
-              className="flex items-center justify-center gap-2 rounded border border-dashed border-line bg-panel/70 px-4 py-3 text-sm text-cinnabar transition-colors hover:border-cinnabar hover:bg-panel"
+              className={buttonClass({
+                variant: "outline",
+                className: "w-full border-dashed px-4 py-3",
+              })}
             >
               <Plus className="h-4 w-4" aria-hidden="true" />
               新建作品
@@ -200,7 +207,10 @@ function NewProjectCard() {
   return (
     <Link
       href="/projects/new"
-      className="group flex h-full min-h-[176px] flex-col items-center justify-center rounded border border-dashed border-line bg-panel/70 text-center transition-colors hover:border-cinnabar hover:bg-panel"
+      className={buttonClass({
+        variant: "outline",
+        className: "group h-full min-h-[176px] flex-col border-dashed text-center",
+      })}
     >
       <span className="mb-3 flex h-10 w-10 items-center justify-center rounded bg-[var(--color-cinnabar-wash)] text-cinnabar transition-colors group-hover:bg-cinnabar group-hover:text-panel">
         <Plus className="h-5 w-5" aria-hidden="true" />
diff --git a/apps/web/components/rules/RulesPage.tsx b/apps/web/components/rules/RulesPage.tsx
index 81ce618..41ae654 100644
--- a/apps/web/components/rules/RulesPage.tsx
+++ b/apps/web/components/rules/RulesPage.tsx
@@ -18,6 +18,7 @@ import {
   type RuleLevel,
 } from "@/lib/rules/rules";
 import { useRules } from "@/lib/rules/useRules";
+import { cardClass } from "@/lib/ui/variants";
 
 interface RulesPageProps {
   project: ProjectResponse;
@@ -120,21 +121,24 @@ export function RulesPage({ project, initialRules }: RulesPageProps) {
                   {groups[lv].map((rule) => (
                     <li
                       key={rule.id}
-                      className="flex items-start justify-between gap-3 rounded border border-line bg-panel px-3 py-2 text-sm text-ink"
+                      className={cardClass(
+                        "flex items-start justify-between gap-3 p-3 text-sm text-ink",
+                      )}
                     >
                       <span className="min-w-0 flex-1 break-words">
                         {rule.content}
                       </span>
-                      <button
-                        type="button"
+                      <Button
+                        variant="danger"
+                        size="sm"
                         disabled={busy}
                         onClick={() => void remove(project.id, rule.id)}
                         aria-label="删除规则"
-                        className="inline-flex shrink-0 items-center gap-1 rounded border border-transparent px-2 py-1 text-xs text-ink-soft transition-colors hover:border-conflict/25 hover:bg-conflict/10 hover:text-conflict disabled:opacity-50"
+                        className="shrink-0"
                       >
                         <Trash2 className="h-3 w-3" aria-hidden="true" />
                         删除
-                      </button>
+                      </Button>
                     </li>
                   ))}
                 </ul>
diff --git a/apps/web/components/style/RefineView.tsx b/apps/web/components/style/RefineView.tsx
index d4f84b6..66ae8a0 100644
--- a/apps/web/components/style/RefineView.tsx
+++ b/apps/web/components/style/RefineView.tsx
@@ -46,14 +46,15 @@ export function RefineView({
     >
       <div className="mb-2 flex items-center justify-between">
         <h3 className="font-semibold text-ink">回炉对比</h3>
-        <button
+        <Button
           type="button"
+          variant="ghost"
+          size="icon"
           onClick={onClose}
-          className="rounded border border-transparent p-1 text-ink-soft hover:border-line hover:text-cinnabar"
-          aria-label="关闭回炉对比"
+          aria-label="关闭"
         >
           <X className="h-4 w-4" aria-hidden="true" />
-        </button>
+        </Button>
       </div>
 
       {segment.trim().length === 0 ? (
diff --git a/apps/web/components/style/StylePanel.tsx b/apps/web/components/style/StylePanel.tsx
index c8b8064..7af5e7a 100644
--- a/apps/web/components/style/StylePanel.tsx
+++ b/apps/web/components/style/StylePanel.tsx
@@ -4,6 +4,7 @@ import { CheckCircle2, CircleDashed, RotateCcw } from "lucide-react";
 
 import { Badge } from "@/components/ui/Badge";
 import { Button } from "@/components/ui/Button";
+import { cardClass } from "@/lib/ui/variants";
 import type { StyleDriftReport, StyleDriftSegment } from "@/lib/review/sse";
 
 interface StylePanelProps {
@@ -63,7 +64,7 @@ export function StylePanel({ style, incomplete, onRefine }: StylePanelProps) {
               {style.segments.map((seg, i) => (
                 <li
                   key={i}
-                  className="rounded border border-line bg-panel p-2"
+                  className={cardClass("p-2")}
                   data-testid="drift-segment"
                 >
                   <div className="flex items-center gap-2">
diff --git a/apps/web/components/style/StyleUpload.tsx b/apps/web/components/style/StyleUpload.tsx
index 952b618..95edb7b 100644
--- a/apps/web/components/style/StyleUpload.tsx
+++ b/apps/web/components/style/StyleUpload.tsx
@@ -8,6 +8,7 @@ import { Button } from "@/components/ui/Button";
 import { Field } from "@/components/ui/Field";
 import { StatusNote } from "@/components/ui/StatusNote";
 import { TextArea } from "@/components/ui/TextArea";
+import { buttonClass } from "@/lib/ui/variants";
 
 interface StyleUploadProps {
   busy: boolean;
@@ -76,7 +77,7 @@ export function StyleUpload({
       </Field>
 
       <div className="flex items-center gap-3">
-        <label className="cursor-pointer rounded border border-line px-3 py-1.5 text-sm text-ink hover:border-cinnabar hover:text-cinnabar">
+        <label className={buttonClass({ variant: "secondary", className: "cursor-pointer" })}>
           选择文本文件
           <input
             type="file"
diff --git a/apps/web/components/templates/TemplatesManager.tsx b/apps/web/components/templates/TemplatesManager.tsx
index 91ca143..f1d0492 100644
--- a/apps/web/components/templates/TemplatesManager.tsx
+++ b/apps/web/components/templates/TemplatesManager.tsx
@@ -16,6 +16,7 @@ import {
   isTemplateDraftValid,
   type TemplateDraft,
 } from "@/lib/templates/templates";
+import { cardClass } from "@/lib/ui/variants";
 
 interface TemplatesManagerProps {
   // 初始模板列表（Server Component 预取；失败给空数组 + loadError 文案）。
@@ -87,7 +88,7 @@ export function TemplatesManager({ initial }: TemplatesManagerProps) {
   return (
     <div className="flex flex-col gap-6">
       <form
-        className="flex flex-col gap-3 rounded border border-line bg-panel p-5"
+        className={cardClass("flex flex-col gap-3 p-5")}
         aria-label="新建模板"
         onSubmit={(e) => {
           e.preventDefault();
diff --git a/apps/web/components/toolbox/TemplateFiller.tsx b/apps/web/components/toolbox/TemplateFiller.tsx
index 02e3486..88db071 100644
--- a/apps/web/components/toolbox/TemplateFiller.tsx
+++ b/apps/web/components/toolbox/TemplateFiller.tsx
@@ -3,8 +3,10 @@
 import { useCallback, useEffect, useState } from "react";
 
 import { useToast } from "@/components/Toast";
+import { Button } from "@/components/ui/Button";
 import { api } from "@/lib/api/client";
 import type { TemplateResponse } from "@/lib/api/types";
+import { buttonClass } from "@/lib/ui/variants";
 
 interface TemplateFillerProps {
   // 可填入的目标输入字段名（如 brief / text）；空 → 不渲染（无可填字段）。
@@ -44,13 +46,14 @@ export function TemplateFiller({ targetField, onFill }: TemplateFillerProps) {
 
   if (!open) {
     return (
-      <button
-        type="button"
+      <Button
+        variant="secondary"
+        size="sm"
         onClick={() => setOpen(true)}
-        className="self-start rounded border border-line px-3 py-1 text-sm text-ink-soft hover:text-ink"
+        className="self-start"
       >
         从模板填入
-      </button>
+      </Button>
     );
   }
 
@@ -61,13 +64,13 @@ export function TemplateFiller({ targetField, onFill }: TemplateFillerProps) {
     >
       <div className="flex items-center justify-between">
         <span className="text-sm text-ink-soft">选一个模板填入「{field}」</span>
-        <button
-          type="button"
+        <Button
+          variant="ghost"
+          size="sm"
           onClick={() => setOpen(false)}
-          className="text-xs text-ink-soft hover:text-ink"
         >
           收起
-        </button>
+        </Button>
       </div>
       {templates === null ? (
         <p className="text-sm text-ink-soft">加载中…</p>
@@ -84,7 +87,10 @@ export function TemplateFiller({ targetField, onFill }: TemplateFillerProps) {
                   setOpen(false);
                   toast(`已填入模板「${t.title}」。`, "success");
                 }}
-                className="w-full rounded border border-line px-3 py-2 text-left text-sm text-ink hover:border-cinnabar"
+                className={buttonClass({
+                  variant: "secondary",
+                  className: "w-full justify-start text-left text-ink",
+                })}
               >
                 <span className="font-serif">{t.title}</span>
                 {t.tool_key ? (