diff --git a/web/src/app/(main)/function/llm-records/page.tsx b/web/src/app/(main)/function/llm-records/page.tsx
index 5f05618..28dbe6a 100644
--- a/web/src/app/(main)/function/llm-records/page.tsx
+++ b/web/src/app/(main)/function/llm-records/page.tsx
@@ -29,21 +29,9 @@ import { Input } from "@/components/ui/input";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Switch } from "@/components/ui/switch";
-import {
-  Table,
-  TableBody,
-  TableCell,
-  TableHead,
-  TableHeader,
-  TableRow,
-} from "@/components/ui/table";
-import {
-  Select,
-  SelectContent,
-  SelectItem,
-  SelectTrigger,
-  SelectValue,
-} from "@/components/ui/select";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { HttpPacketSyntax } from "@/components/http-code-block";
 import { cn } from "@/lib/utils";
 import { api } from "@/lib/api";
 import type { LLMRecordItem, LLMRecordDetail, LLMTask } from "@/lib/types";
@@ -80,7 +68,12 @@ function tryFormatJSON(s: string): string {
 function CopyButton({ text }: { text: string }) {
   const [copied, setCopied] = React.useState(false);
   const timer = React.useRef<ReturnType<typeof setTimeout> | null>(null);
-  React.useEffect(() => () => { if (timer.current) clearTimeout(timer.current); }, []);
+  React.useEffect(
+    () => () => {
+      if (timer.current) clearTimeout(timer.current);
+    },
+    [],
+  );
 
   const disabled = !text;
   const copy = async () => {
@@ -95,7 +88,11 @@ function CopyButton({ text }: { text: string }) {
       ta.style.opacity = "0";
       document.body.appendChild(ta);
       ta.select();
-      try { document.execCommand("copy"); } catch { /* 忽略：不支持则静默 */ }
+      try {
+        document.execCommand("copy");
+      } catch {
+        /* 忽略：不支持则静默 */
+      }
       document.body.removeChild(ta);
     }
     setCopied(true);
@@ -151,9 +148,7 @@ export default function LLMRecordsPage() {
   const reqText = showRaw
     ? detail?.raw_request && tryFormatJSON(detail.raw_request)
     : detail?.request_body && tryFormatJSON(detail.request_body);
-  const respText = showRaw
-    ? detail?.raw_response
-    : detail?.response_body && tryFormatJSON(detail.response_body);
+  const respText = showRaw ? detail?.raw_response : detail?.response_body && tryFormatJSON(detail.response_body);
 
   // Per-task delete (task picker + confirm dialog)
   const [tasks, setTasks] = React.useState<LLMTask[]>([]);
@@ -167,9 +162,13 @@ export default function LLMRecordsPage() {
     let alive = true;
     api
       .settings()
-      .then((s) => { if (alive) setRecEnabled(!!s.llm_record); })
+      .then((s) => {
+        if (alive) setRecEnabled(!!s.llm_record);
+      })
       .catch(() => {});
-    return () => { alive = false; };
+    return () => {
+      alive = false;
+    };
   }, []);
 
   const toggleRecording = async (on: boolean) => {
@@ -201,7 +200,13 @@ export default function LLMRecordsPage() {
     let alive = true;
     setLoading(true);
     api
-      .llmRecords({ model: model || undefined, session: sessionQ || undefined, task: pickedTask || undefined, page, size })
+      .llmRecords({
+        model: model || undefined,
+        session: sessionQ || undefined,
+        task: pickedTask || undefined,
+        page,
+        size,
+      })
       .then((r) => {
         if (!alive) return;
         setRecords(r.records ?? []);
@@ -211,9 +216,13 @@ export default function LLMRecordsPage() {
       .finally(() => alive && setLoading(false));
     api
       .llmTasks()
-      .then((r) => { if (alive) setTasks(r.tasks ?? []); })
+      .then((r) => {
+        if (alive) setTasks(r.tasks ?? []);
+      })
       .catch(() => {});
-    return () => { alive = false; };
+    return () => {
+      alive = false;
+    };
   }, [page, size, sessionQ, model, pickedTask, reloadTick]);
 
   // Delete every LLM record for the picked task, then refetch.
@@ -244,10 +253,16 @@ export default function LLMRecordsPage() {
     setDetail(null);
     api
       .llmRecordDetail(selected.id)
-      .then((d) => { if (alive) setDetail(d); })
+      .then((d) => {
+        if (alive) setDetail(d);
+      })
       .catch(() => {})
-      .finally(() => { if (alive) setDetailLoading(false); });
-    return () => { alive = false; };
+      .finally(() => {
+        if (alive) setDetailLoading(false);
+      });
+    return () => {
+      alive = false;
+    };
   }, [selected]);
 
   const totalPages = Math.max(1, Math.ceil(total / size));
@@ -276,12 +291,7 @@ export default function LLMRecordsPage() {
             className="h-8 pl-8"
           />
         </div>
-        <Input
-          placeholder="Model"
-          className="h-8 w-48"
-          value={model}
-          onChange={(e) => setModel(e.target.value)}
-        />
+        <Input placeholder="Model" className="h-8 w-48" value={model} onChange={(e) => setModel(e.target.value)} />
         <Select value={pickedTask} onValueChange={setPickedTask}>
           <SelectTrigger size="sm" className="w-56">
             <SelectValue placeholder="选择任务…" />
@@ -407,15 +417,10 @@ export default function LLMRecordsPage() {
                   records.map((rec) => (
                     <TableRow
                       key={rec.id}
-                      className={cn(
-                        "cursor-pointer",
-                        selected?.id === rec.id && "bg-accent hover:bg-accent",
-                      )}
+                      className={cn("cursor-pointer", selected?.id === rec.id && "bg-accent hover:bg-accent")}
                       onClick={() => setSelected(rec)}
                     >
-                      <TableCell className="text-xs text-muted-foreground tabular-nums">
-                        {fmtTime(rec.ts)}
-                      </TableCell>
+                      <TableCell className="text-xs text-muted-foreground tabular-nums">{fmtTime(rec.ts)}</TableCell>
                       <TableCell className="text-xs font-mono text-muted-foreground">
                         {rec.task_id ? `#${rec.task_id}` : "-"}
                       </TableCell>
@@ -442,9 +447,13 @@ export default function LLMRecordsPage() {
                       </TableCell>
                       <TableCell>
                         {rec.status === "ok" ? (
-                          <Badge variant="secondary" className="text-xs text-emerald-600">OK</Badge>
+                          <Badge variant="secondary" className="text-xs text-emerald-600">
+                            OK
+                          </Badge>
                         ) : (
-                          <Badge variant="destructive" className="text-xs">Error</Badge>
+                          <Badge variant="destructive" className="text-xs">
+                            Error
+                          </Badge>
                         )}
                       </TableCell>
                     </TableRow>
@@ -474,16 +483,18 @@ export default function LLMRecordsPage() {
                   任务 #{selected.task_id}
                 </Badge>
               )}
-              <span className="text-xs text-muted-foreground">
-                {fmtTime(selected.ts)}
-              </span>
+              <span className="text-xs text-muted-foreground">{fmtTime(selected.ts)}</span>
               <span className={cn("text-xs", selected.latency_ms > 30000 && "text-amber-500")}>
                 {fmtLatency(selected.latency_ms)}
               </span>
               {selected.status === "ok" ? (
-                <Badge variant="secondary" className="text-xs text-emerald-600">OK</Badge>
+                <Badge variant="secondary" className="text-xs text-emerald-600">
+                  OK
+                </Badge>
               ) : (
-                <Badge variant="destructive" className="text-xs">Error</Badge>
+                <Badge variant="destructive" className="text-xs">
+                  Error
+                </Badge>
               )}
               {/* 原文视图开关。旧记录没有原文，此时禁用而非静默回退，避免看着像
                   「原文与解析一致」。 */}
@@ -497,12 +508,7 @@ export default function LLMRecordsPage() {
               >
                 原文
               </Button>
-              <Button
-                variant="ghost"
-                size="icon"
-                className="size-7 shrink-0"
-                onClick={() => setSelected(null)}
-              >
+              <Button variant="ghost" size="icon" className="size-7 shrink-0" onClick={() => setSelected(null)}>
                 <XIcon />
               </Button>
             </div>
@@ -521,7 +527,7 @@ export default function LLMRecordsPage() {
                     </div>
                   ) : (
                     <pre className="p-3 font-mono text-xs break-all whitespace-pre-wrap">
-                      {reqText || "（空）"}
+                      <HttpPacketSyntax raw={reqText || ""} lineNumbers={false} emptyFallback="（空）" />
                     </pre>
                   )}
                 </div>
@@ -538,11 +544,13 @@ export default function LLMRecordsPage() {
                       加载…
                     </div>
                   ) : (
-                    <pre className={cn(
-                      "p-3 font-mono text-xs break-all whitespace-pre-wrap",
-                      selected.status !== "ok" && "text-red-600 dark:text-red-400",
-                    )}>
-                      {respText || "（空）"}
+                    <pre
+                      className={cn(
+                        "p-3 font-mono text-xs break-all whitespace-pre-wrap",
+                        selected.status !== "ok" && "text-red-600 dark:text-red-400",
+                      )}
+                    >
+                      <HttpPacketSyntax raw={respText || ""} lineNumbers={false} emptyFallback="（空）" />
                     </pre>
                   )}
                 </div>
diff --git a/web/src/app/(main)/function/traffic/page.tsx b/web/src/app/(main)/function/traffic/page.tsx
index f80910b..21306c1 100644
--- a/web/src/app/(main)/function/traffic/page.tsx
+++ b/web/src/app/(main)/function/traffic/page.tsx
@@ -43,7 +43,6 @@ import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@
 import { Sheet, SheetContent, SheetDescription, SheetHeader, SheetTitle } from "@/components/ui/sheet";
 import { SortableHead } from "@/components/ui/sortable-head";
 import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { api } from "@/lib/api";
 import { useStoredSortPreference } from "@/lib/sort-preference";
@@ -774,7 +773,7 @@ export default function TrafficPage() {
         />
       ) : null}
       <Sheet open={selected !== null} onOpenChange={(open) => !open && setSelected(null)}>
-        <SheetContent className="w-full! max-w-none! gap-0 p-0 sm:w-[48rem]! sm:max-w-[48rem]!">
+        <SheetContent className="w-full! max-w-none! gap-0 p-0 sm:w-[72rem]! sm:max-w-[72rem]!">
           {selected && (
             <>
               <SheetHeader className="border-b px-5 py-4">
@@ -797,32 +796,24 @@ export default function TrafficPage() {
                   {importing ? "转入中…" : "送入请求重发"}
                 </Button>
               </SheetHeader>
-              <Tabs defaultValue="request" className="min-h-0 flex-1 gap-0">
-                <TabsList className="mx-5 mt-4 grid w-auto grid-cols-2">
-                  <TabsTrigger value="request">请求 Request</TabsTrigger>
-                  <TabsTrigger value="response">响应 Response</TabsTrigger>
-                </TabsList>
-                <TabsContent value="request" className="min-h-0 overflow-auto">
-                  {detailLoading ? (
-                    <div className="flex items-center gap-2 p-5 text-xs text-muted-foreground">
-                      <Loader2Icon className="size-3.5 animate-spin" />
-                      加载报文…
-                    </div>
-                  ) : (
-                    <HttpCodeBlock raw={requestWithHost(detail?.req ?? "", selected)} />
-                  )}
-                </TabsContent>
-                <TabsContent value="response" className="min-h-0 overflow-auto">
-                  {detailLoading ? (
-                    <div className="flex items-center gap-2 p-5 text-xs text-muted-foreground">
-                      <Loader2Icon className="size-3.5 animate-spin" />
-                      加载报文…
-                    </div>
-                  ) : (
-                    <HttpCodeBlock raw={detail?.resp ?? ""} />
-                  )}
-                </TabsContent>
-              </Tabs>
+              <div className="grid min-h-0 flex-1 grid-cols-1 gap-2 overflow-hidden p-2 sm:grid-cols-2">
+                {[
+                  ["request", "请求 Request", requestWithHost(detail?.req ?? "", selected)],
+                  ["response", "响应 Response", detail?.resp ?? ""],
+                ].map(([key, label, raw]) => (
+                  <div key={key} className="flex min-h-0 min-w-0 flex-col gap-1 overflow-hidden">
+                    <span className="px-1 text-[11px] font-medium text-muted-foreground">{label}</span>
+                    {detailLoading ? (
+                      <div className="flex min-h-0 flex-1 items-center justify-center gap-2 rounded-md border bg-muted/10 text-xs text-muted-foreground">
+                        <Loader2Icon className="size-3.5 animate-spin" />
+                        加载报文…
+                      </div>
+                    ) : (
+                      <HttpCodeBlock raw={raw} />
+                    )}
+                  </div>
+                ))}
+              </div>
             </>
           )}
         </SheetContent>
diff --git a/web/src/components/credential-content.tsx b/web/src/components/credential-content.tsx
index 062d36d..6f2d5a7 100644
--- a/web/src/components/credential-content.tsx
+++ b/web/src/components/credential-content.tsx
@@ -11,7 +11,6 @@ import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from "@/components/ui/dialog";
 import { Skeleton } from "@/components/ui/skeleton";
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { api } from "@/lib/api";
 import { toneClasses } from "@/lib/status";
 import type { CredentialAccount, CredentialTraffic, CredentialTrafficDetail, TaskIntelligence } from "@/lib/types";
@@ -344,26 +343,22 @@ export function CredentialTrafficViewer({
               {data.reference.side === "request" ? "请求包含匹配凭据" : "响应包含匹配凭据"}，不代表认证验证成功。
             </p>
             <p className="text-sm">绑定时保存的匹配片段</p>
-            <pre className="max-h-52 overflow-auto whitespace-pre-wrap break-all rounded bg-muted p-3 text-xs">
-              {data.reference.excerpt}
-            </pre>
+            <HttpCodeBlock raw={data.reference.excerpt} />
             {data.unavailable ? (
               <Alert>
                 <AlertDescription>原始流量已删除或不可用，仍可查看上方保存的匹配片段。</AlertDescription>
               </Alert>
             ) : (
-              <Tabs defaultValue={data.reference.side}>
-                <TabsList>
-                  <TabsTrigger value="request">请求</TabsTrigger>
-                  <TabsTrigger value="response">响应</TabsTrigger>
-                </TabsList>
-                <TabsContent value="request">
+              <div className="grid min-w-0 grid-cols-1 gap-3 sm:grid-cols-2">
+                <div className="min-w-0">
+                  <p className="mb-1 px-1 text-sm font-medium">请求 Request</p>
                   <HttpCodeBlock raw={data.req ?? ""} />
-                </TabsContent>
-                <TabsContent value="response">
+                </div>
+                <div className="min-w-0">
+                  <p className="mb-1 px-1 text-sm font-medium">响应 Response</p>
                   <HttpCodeBlock raw={data.resp ?? ""} />
-                </TabsContent>
-              </Tabs>
+                </div>
+              </div>
             )}
           </div>
         ) : (
diff --git a/web/src/components/http-code-block.tsx b/web/src/components/http-code-block.tsx
index 0a24de1..6d35240 100644
--- a/web/src/components/http-code-block.tsx
+++ b/web/src/components/http-code-block.tsx
@@ -1,7 +1,7 @@
 "use client";
 import * as React from "react";
 
-import { CheckIcon, CopyIcon, WrapTextIcon } from "lucide-react";
+import { CheckIcon, CopyIcon, SearchIcon, WrapTextIcon } from "lucide-react";
 import { toast } from "sonner";
 
 import { Button } from "@/components/ui/button";
@@ -16,15 +16,55 @@ function statusTone(status: number) {
   return "text-muted-foreground";
 }
 
+const PACKET_COLORS = {
+  method: "font-semibold text-violet-600 dark:text-violet-400",
+  url: "text-sky-600 dark:text-sky-400",
+  dim: "text-muted-foreground",
+  headerName: "text-sky-700 dark:text-sky-300",
+  headerValue: "text-emerald-600 dark:text-emerald-400",
+  jsonKey: "text-sky-700 dark:text-sky-300",
+  jsonString: "text-amber-600 dark:text-amber-400",
+  jsonNumber: "text-fuchsia-600 dark:text-fuchsia-400",
+  jsonBoolean: "text-rose-600 dark:text-rose-400",
+  tag: "text-sky-600 dark:text-sky-400",
+};
+
+const PacketHighlightContext = React.createContext("");
+
+function HighlightedText({ text, className }: { text: string; className?: string }) {
+  const query = React.useContext(PacketHighlightContext).trim();
+  if (!query || !text) return <span className={className}>{text}</span>;
+  const needle = query.toLowerCase();
+  const haystack = text.toLowerCase();
+  const parts: React.ReactNode[] = [];
+  let cursor = 0;
+  let key = 0;
+  for (;;) {
+    const match = haystack.indexOf(needle, cursor);
+    if (match < 0) {
+      parts.push(text.slice(cursor));
+      break;
+    }
+    if (match > cursor) parts.push(text.slice(cursor, match));
+    parts.push(
+      <mark key={key++} className="rounded-[2px] bg-yellow-300 text-black">
+        {text.slice(match, match + needle.length)}
+      </mark>,
+    );
+    cursor = match + needle.length;
+  }
+  return <span className={className}>{parts}</span>;
+}
+
 function StartLine({ line }: { line: string }) {
   const response = /^(HTTP\/\S+)(\s+)(\d{3})(.*)$/.exec(line);
   if (response) {
     return (
       <>
-        <span className="text-muted-foreground">{response[1]}</span>
+        <HighlightedText text={response[1]} className={PACKET_COLORS.dim} />
         {response[2]}
-        <span className={statusTone(Number(response[3]))}>{response[3]}</span>
-        {response[4]}
+        <HighlightedText text={response[3]} className={statusTone(Number(response[3]))} />
+        <HighlightedText text={response[4]} />
       </>
     );
   }
@@ -33,26 +73,26 @@ function StartLine({ line }: { line: string }) {
   if (request) {
     return (
       <>
-        <span className="font-semibold text-primary">{request[1]}</span>
+        <HighlightedText text={request[1]} className={PACKET_COLORS.method} />
         {request[2]}
-        <span className="text-chart-2">{request[3]}</span>
+        <HighlightedText text={request[3]} className={PACKET_COLORS.url} />
         {request[4]}
-        <span className="text-muted-foreground">{request[5]}</span>
+        <HighlightedText text={request[5]} className={PACKET_COLORS.dim} />
       </>
     );
   }
 
-  return line;
+  return <HighlightedText text={line} />;
 }
 
 function HeaderLine({ line }: { line: string }) {
   const separator = line.indexOf(":");
-  if (separator <= 0) return line;
+  if (separator <= 0) return <HighlightedText text={line} />;
   return (
     <>
-      <span className="text-primary">{line.slice(0, separator)}</span>
-      <span className="text-muted-foreground">:</span>
-      <span className="text-chart-2">{line.slice(separator + 1)}</span>
+      <HighlightedText text={line.slice(0, separator)} className={PACKET_COLORS.headerName} />
+      <span className={PACKET_COLORS.dim}>:</span>
+      <HighlightedText text={line.slice(separator + 1)} className={PACKET_COLORS.headerValue} />
     </>
   );
 }
@@ -63,18 +103,14 @@ function JsonBody({ body }: { body: string }) {
   let cursor = 0;
   for (const match of body.matchAll(tokens)) {
     const index = match.index ?? 0;
-    if (index > cursor) parts.push(body.slice(cursor, index));
-    let className = "text-chart-4";
-    if (match[1]) className = match[2] ? "text-primary" : "text-chart-2";
-    else if (match[3]) className = "text-chart-3";
-    parts.push(
-      <span key={`${index}-${match[0].length}`} className={className}>
-        {match[0]}
-      </span>,
-    );
+    if (index > cursor) parts.push(<HighlightedText key={`plain-${cursor}`} text={body.slice(cursor, index)} />);
+    let className = PACKET_COLORS.jsonNumber;
+    if (match[1]) className = match[2] ? PACKET_COLORS.jsonKey : PACKET_COLORS.jsonString;
+    else if (match[3]) className = PACKET_COLORS.jsonBoolean;
+    parts.push(<HighlightedText key={`${index}-${match[0].length}`} text={match[0]} className={className} />);
     cursor = index + match[0].length;
   }
-  if (cursor < body.length) parts.push(body.slice(cursor));
+  if (cursor < body.length) parts.push(<HighlightedText key={`plain-${cursor}`} text={body.slice(cursor)} />);
   return parts;
 }
 
@@ -84,15 +120,11 @@ function MarkupBody({ body }: { body: string }) {
   let cursor = 0;
   for (const match of body.matchAll(tags)) {
     const index = match.index ?? 0;
-    if (index > cursor) parts.push(body.slice(cursor, index));
-    parts.push(
-      <span key={`${index}-${match[0].length}`} className="text-primary">
-        {match[0]}
-      </span>,
-    );
+    if (index > cursor) parts.push(<HighlightedText key={`plain-${cursor}`} text={body.slice(cursor, index)} />);
+    parts.push(<HighlightedText key={`${index}-${match[0].length}`} text={match[0]} className={PACKET_COLORS.tag} />);
     cursor = index + match[0].length;
   }
-  if (cursor < body.length) parts.push(body.slice(cursor));
+  if (cursor < body.length) parts.push(<HighlightedText key={`plain-${cursor}`} text={body.slice(cursor)} />);
   return parts;
 }
 
@@ -108,7 +140,82 @@ function detectBodyFormat(body: string): BodyFormat {
 function HighlightedBody({ body, format }: { body: string; format: BodyFormat }) {
   if (format === "json") return <JsonBody body={body} />;
   if (format === "markup") return <MarkupBody body={body} />;
-  return body;
+  return <HighlightedText text={body} />;
+}
+
+export function HttpPacketSyntax({
+  raw,
+  wrapLines = true,
+  lineNumbers = true,
+  emptyFallback = "（空）",
+  lineClassName = "leading-relaxed",
+}: {
+  raw: string;
+  wrapLines?: boolean;
+  lineNumbers?: boolean;
+  emptyFallback?: string;
+  lineClassName?: string;
+}) {
+  const value = raw || emptyFallback;
+  const lines = value.replaceAll("\r\n", "\n").split("\n");
+  const lineItems = React.useMemo(() => {
+    const occurrences = new Map<string, number>();
+    return lines.map((line) => {
+      const occurrence = occurrences.get(line) ?? 0;
+      occurrences.set(line, occurrence + 1);
+      return { key: `${line}\u0000${occurrence}`, line };
+    });
+  }, [value]);
+  const separator = lines.indexOf("");
+  const body = separator >= 0 ? lines.slice(separator + 1).join("\n") : value;
+  const bodyFormat = detectBodyFormat(body);
+  const renderLine = (line: string, index: number) => {
+    if (separator < 0 && bodyFormat !== "plain") return <HighlightedBody body={line} format={bodyFormat} />;
+    if (index === 0) return <StartLine line={line} />;
+    if (separator < 0 || index < separator) return <HeaderLine line={line} />;
+    if (index === separator) return null;
+    return <HighlightedBody body={line} format={bodyFormat} />;
+  };
+  return (
+    <>
+      {lineItems.map((item, index) => (
+        <div
+          key={item.key}
+          data-line={index + 1}
+          className={cn("grid min-w-0", lineClassName, lineNumbers && "grid-cols-[2.25rem_minmax(0,1fr)]")}
+        >
+          {lineNumbers ? (
+            <span className="sticky left-0 self-stretch border-r bg-muted/20 px-1 text-right text-[11px] text-muted-foreground/50">
+              {index + 1}
+            </span>
+          ) : null}
+          <code
+            className={cn(
+              "min-h-[1lh] min-w-0 [tab-size:4]",
+              lineNumbers ? "pr-14 pl-2" : "",
+              wrapLines ? "break-words whitespace-pre-wrap" : "whitespace-pre",
+            )}
+          >
+            {renderLine(item.line, index)}
+          </code>
+        </div>
+      ))}
+    </>
+  );
+}
+
+function countMatches(value: string, query: string) {
+  const needle = query.trim().toLowerCase();
+  if (!needle) return 0;
+  const haystack = value.toLowerCase();
+  let count = 0;
+  let cursor = 0;
+  while (cursor <= haystack.length - needle.length) {
+    const index = haystack.indexOf(needle, cursor);
+    if (index < 0) return count;
+    count += 1;
+    cursor = index + needle.length;
+  }
 }
 
 // Empty grid rows have no text, so native selection copying drops their newlines.
@@ -148,11 +255,10 @@ function selectedPacketText(container: HTMLElement, value: string, lines: string
 export function HttpCodeBlock({ raw }: { raw: string }) {
   const [wrapLines, setWrapLines] = React.useState(true);
   const [copied, setCopied] = React.useState(false);
+  const [query, setQuery] = React.useState("");
   const value = raw || "（空）";
   const lines = value.replaceAll("\r\n", "\n").split("\n");
-  const separator = lines.indexOf("");
-  const body = separator >= 0 ? lines.slice(separator + 1).join("\n") : "";
-  const bodyFormat = detectBodyFormat(body);
+  const matches = React.useMemo(() => countMatches(value, query), [value, query]);
 
   React.useEffect(() => {
     if (!copied) return;
@@ -169,15 +275,8 @@ export function HttpCodeBlock({ raw }: { raw: string }) {
     toast.error("复制失败，请使用 Ctrl/Cmd+A 后复制");
   };
 
-  const renderLine = (line: string, index: number) => {
-    if (index === 0) return <StartLine line={line} />;
-    if (separator < 0 || index < separator) return <HeaderLine line={line} />;
-    if (index === separator) return null;
-    return <HighlightedBody body={line} format={bodyFormat} />;
-  };
-
   return (
-    <div className="relative mx-3 my-4 overflow-hidden rounded-md border bg-background shadow-xs">
+    <div className="relative mx-3 my-4 flex min-h-0 flex-col overflow-hidden rounded-md border bg-background shadow-xs">
       <div className="absolute top-2 right-2 flex items-center gap-0.5 rounded-md border bg-background/95 p-0.5 shadow-xs">
         <Tooltip>
           <TooltipTrigger asChild>
@@ -216,7 +315,7 @@ export function HttpCodeBlock({ raw }: { raw: string }) {
         aria-multiline="true"
         aria-readonly="true"
         tabIndex={0}
-        className="max-h-[calc(100vh-15rem)] min-w-0 overflow-auto bg-background py-3 font-mono text-xs outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-ring"
+        className="min-h-0 max-h-[calc(100vh-15rem)] flex-1 min-w-0 overflow-auto bg-background py-2 font-mono text-xs outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-ring"
         onCopy={(event) => {
           const text = selectedPacketText(event.currentTarget, value, lines);
           if (text === null) return;
@@ -234,22 +333,29 @@ export function HttpCodeBlock({ raw }: { raw: string }) {
           selection.addRange(range);
         }}
       >
-        {lines.map((line, index) => (
-          <div
-            key={`${index}-${line}`}
-            data-line={index + 1}
-            className="grid min-w-0 grid-cols-[1.5rem_minmax(0,1fr)] leading-relaxed before:sticky before:left-0 before:self-stretch before:border-r before:bg-muted/20 before:px-1 before:text-right before:text-muted-foreground/60 before:content-[attr(data-line)]"
+        <PacketHighlightContext.Provider value={query}>
+          <HttpPacketSyntax raw={value} wrapLines={wrapLines} />
+        </PacketHighlightContext.Provider>
+      </div>
+      <div className="flex items-center gap-2 border-t bg-muted/20 px-2 py-1">
+        <SearchIcon className="size-3.5 shrink-0 text-muted-foreground" />
+        <input
+          value={query}
+          onChange={(event) => setQuery(event.target.value)}
+          placeholder="搜索报文内容"
+          aria-label="搜索报文内容"
+          className="min-w-0 flex-1 bg-transparent font-mono text-xs outline-none placeholder:text-muted-foreground/60"
+        />
+        {query.trim() ? (
+          <span
+            className={cn(
+              "shrink-0 text-xs tabular-nums",
+              matches ? "font-medium text-foreground" : "text-muted-foreground",
+            )}
           >
-            <code
-              className={cn(
-                "min-h-[1lh] min-w-0 pr-16 pl-1.5 [tab-size:4]",
-                wrapLines ? "break-words whitespace-pre-wrap" : "whitespace-pre",
-              )}
-            >
-              {renderLine(line, index)}
-            </code>
-          </div>
-        ))}
+            {matches} 处命中
+          </span>
+        ) : null}
       </div>
     </div>
   );
diff --git a/web/src/components/repeater/repeater-editor.tsx b/web/src/components/repeater/repeater-editor.tsx
index 7f1fc9c..d6f4563 100644
--- a/web/src/components/repeater/repeater-editor.tsx
+++ b/web/src/components/repeater/repeater-editor.tsx
@@ -154,6 +154,7 @@ export function RepeaterEditor({ tab }: { tab: RepeaterTab }) {
           onChange={changeRequest}
           disabled={busy}
           placeholder="POST /path HTTP/1.1"
+          syntaxHighlight
         />
         <div className="flex min-h-[300px] min-w-0 flex-col gap-2 xl:min-h-0">
           {response?.error ? (
@@ -166,6 +167,7 @@ export function RepeaterEditor({ tab }: { tab: RepeaterTab }) {
             label="响应"
             value={response ? buildRawResponse(response) : ""}
             placeholder="发送后显示原始响应"
+            syntaxHighlight
           />
         </div>
       </div>
diff --git a/web/src/components/repeater/repeater-text-pane.tsx b/web/src/components/repeater/repeater-text-pane.tsx
index 8819074..1bd0342 100644
--- a/web/src/components/repeater/repeater-text-pane.tsx
+++ b/web/src/components/repeater/repeater-text-pane.tsx
@@ -3,6 +3,7 @@
 import * as React from "react";
 
 import { CopyButton } from "@/components/copy-button";
+import { HttpPacketSyntax } from "@/components/http-code-block";
 import { Textarea } from "@/components/ui/textarea";
 
 export function RepeaterTextPane({
@@ -12,6 +13,7 @@ export function RepeaterTextPane({
   onChange,
   disabled,
   placeholder,
+  syntaxHighlight = false,
 }: {
   id: string;
   label: string;
@@ -19,8 +21,10 @@ export function RepeaterTextPane({
   onChange?: (value: string) => void;
   disabled?: boolean;
   placeholder?: string;
+  syntaxHighlight?: boolean;
 }) {
   const gutter = React.useRef<HTMLPreElement>(null);
+  const syntax = React.useRef<HTMLDivElement>(null);
   const lines = React.useMemo(() => value.split(/\r\n|\r|\n/).length, [value]);
   const numbers = React.useMemo(() => Array.from({ length: lines }, (_, index) => index + 1).join("\n"), [lines]);
   return (
@@ -32,7 +36,7 @@ export function RepeaterTextPane({
         <span className="text-muted-foreground text-xs tabular-nums">{lines} 行</span>
         <CopyButton text={value} label={`复制${label}`} className="ml-auto" />
       </div>
-      <div className="flex min-h-0 flex-1 overflow-hidden rounded-lg border border-input focus-within:border-ring">
+      <div className="relative flex min-h-0 flex-1 overflow-hidden rounded-lg border border-input focus-within:border-ring">
         <div
           aria-hidden="true"
           className="w-12 shrink-0 overflow-hidden border-r bg-muted/30 text-right text-muted-foreground"
@@ -47,6 +51,10 @@ export function RepeaterTextPane({
           onChange={(event) => onChange?.(event.target.value)}
           onScroll={(event) => {
             if (gutter.current) gutter.current.style.transform = `translateY(-${event.currentTarget.scrollTop}px)`;
+            if (syntax.current) {
+              syntax.current.scrollTop = event.currentTarget.scrollTop;
+              syntax.current.scrollLeft = event.currentTarget.scrollLeft;
+            }
           }}
           disabled={disabled}
           readOnly={!onChange}
@@ -55,8 +63,28 @@ export function RepeaterTextPane({
           spellCheck={false}
           autoCapitalize="off"
           autoCorrect="off"
-          className="field-sizing-fixed h-full max-h-none min-h-0 w-0 flex-1 resize-none rounded-none border-0 px-3 py-2 font-mono text-xs leading-5 focus-visible:ring-0 md:text-xs"
+          className={
+            "field-sizing-fixed relative z-10 h-full max-h-none min-h-0 w-0 flex-1 resize-none rounded-none border-0 px-3 py-2 font-mono text-xs leading-5 focus-visible:ring-0 md:text-xs " +
+            (syntaxHighlight
+              ? "bg-transparent text-transparent caret-foreground placeholder:text-muted-foreground selection:bg-primary/20 selection:text-transparent "
+              : "")
+          }
         />
+        {syntaxHighlight ? (
+          <div
+            ref={syntax}
+            aria-hidden="true"
+            className="pointer-events-none absolute inset-y-0 right-0 left-12 overflow-hidden px-3 py-2 font-mono text-xs leading-5"
+          >
+            <HttpPacketSyntax
+              raw={value}
+              lineNumbers={false}
+              wrapLines={false}
+              emptyFallback=""
+              lineClassName="leading-5"
+            />
+          </div>
+        ) : null}
       </div>
     </div>
   );
diff --git a/web/src/components/traffic-evidence-viewer.tsx b/web/src/components/traffic-evidence-viewer.tsx
index f614f27..812c473 100644
--- a/web/src/components/traffic-evidence-viewer.tsx
+++ b/web/src/components/traffic-evidence-viewer.tsx
@@ -13,7 +13,6 @@ import { Alert, AlertDescription } from "@/components/ui/alert";
 import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from "@/components/ui/dialog";
 import { Skeleton } from "@/components/ui/skeleton";
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { api } from "@/lib/api";
 import type { FindingTrafficDetail, TrafficDetail } from "@/lib/types";
 
@@ -114,17 +113,16 @@ export function TrafficEvidenceViewer({
             <AlertDescription>{error}</AlertDescription>
           </Alert>
         ) : detail ? (
-          <Tabs defaultValue="request">
-            <TabsList>
-              <TabsTrigger value="request">请求 Request</TabsTrigger>
-              <TabsTrigger value="response">响应 Response</TabsTrigger>
-            </TabsList>
+          <div className="grid min-w-0 grid-cols-1 gap-3 sm:grid-cols-2">
             {(["request", "response"] as const).map((side) => (
-              <TabsContent key={side} value={side}>
+              <div key={side} className="flex min-w-0 flex-col gap-2">
                 <div className="flex flex-wrap items-center justify-between gap-2">
-                  <span className="text-muted-foreground text-xs">
-                    正文 {detail[side].total.toLocaleString()} 字节{detail[side].truncated ? " · 当前为预览" : ""}
-                  </span>
+                  <div>
+                    <p className="text-sm font-medium">{side === "request" ? "请求 Request" : "响应 Response"}</p>
+                    <span className="text-muted-foreground text-xs">
+                      正文 {detail[side].total.toLocaleString()} 字节{detail[side].truncated ? " · 当前为预览" : ""}
+                    </span>
+                  </div>
                   <Button
                     variant="outline"
                     size="sm"
@@ -134,7 +132,7 @@ export function TrafficEvidenceViewer({
                         .catch((e: Error) => toast.error(e.message))
                     }
                   >
-                    下载完整{side === "request" ? "请求" : "响应"}正文
+                    下载完整正文
                   </Button>
                 </div>
                 <HttpCodeBlock
@@ -145,9 +143,9 @@ export function TrafficEvidenceViewer({
                     加载更多正文
                   </Button>
                 ) : null}
-              </TabsContent>
+              </div>
             ))}
-          </Tabs>
+          </div>
         ) : (
           <Skeleton className="h-56 w-full" />
         )}
@@ -193,18 +191,16 @@ export function CapturedTrafficViewer({ id, onClose }: { id: string | null; onCl
             <AlertDescription>{error}</AlertDescription>
           </Alert>
         ) : detail ? (
-          <Tabs defaultValue="request">
-            <TabsList>
-              <TabsTrigger value="request">请求 Request</TabsTrigger>
-              <TabsTrigger value="response">响应 Response</TabsTrigger>
-            </TabsList>
-            <TabsContent value="request">
+          <div className="grid min-w-0 grid-cols-1 gap-3 sm:grid-cols-2">
+            <div className="min-w-0">
+              <p className="mb-1 px-1 text-sm font-medium">请求 Request</p>
               <HttpCodeBlock raw={detail.req} />
-            </TabsContent>
-            <TabsContent value="response">
+            </div>
+            <div className="min-w-0">
+              <p className="mb-1 px-1 text-sm font-medium">响应 Response</p>
               <HttpCodeBlock raw={detail.resp} />
-            </TabsContent>
-          </Tabs>
+            </div>
+          </div>
         ) : (
           <Skeleton className="h-56 w-full" />
         )}