添加爬取结果数据文件

- 最近7天的中标结果数据（2026-01-29 至 2026-02-05）
- 共 349 条记录

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

README.md

@@ -4,14 +4,15 @@
 
 ## 功能特性
 
-- **关键字过滤**：自动筛选标题中包含“中标结果”的公告。
+- **精准筛选**：通过 `tradingProcess` 字段直接筛选中标结果，无需标题关键词过滤。
-- **日期过滤**：支持指定开始和结束日期，默认为抓取当天数据。
+- **日期范围查询**：支持指定开始和结束日期，**默认为最近3个月**。
-- **自动分页**：自动处理多页数据抓取。
+- **高效分页**：每页 50 条记录，自动处理多页数据抓取。
+- **API 时间过滤**：时间参数直接通过接口 `publishStartTime` 和 `publishEndTime` 传入，减少无效数据传输。
 - **动态构造 URL**：根据接口返回字段自动生成可直接访问的详情页链接。
 - **纯 HTTP 请求**：直接使用 aiohttp 调用官方 API，无需浏览器，轻量高效。
-- **CSV 实时保存**：数据实时保存到 CSV 文件，同时输出到终端。
+- **CSV 实时保存**：数据实时保存到 CSV 文件（带 UTF-8 BOM，Excel 可直接打开），同时输出到终端。
 - **自定义输出路径**：支持通过参数指定输出文件路径。
-- **增量爬取**：支持从已有 CSV 文件自动计算时间范围，只抓取新数据，避免重复。
+- **增量爬取**：自动从已有 CSV 文件计算时间范围，只抓取新数据，避免重复。如需全量查询，删除 CSV 文件即可。
 - **数据排序**：新数据在前，旧数据在后，按发布时间倒序排列。
 
 ## 环境要求
@@ -39,37 +40,49 @@
 
 ## 使用方法
 
-### 1. 抓取今天发布的数据 (默认)
+### 1. 抓取最近3个月的数据 (默认)
-直接运行脚本，程序将自动抓取发布日期为今天的“中标结果”公告。
+直接运行脚本，程序将自动抓取最近3个月的中标结果公告。
 ```bash
-python ygp_crawler.py
+python main.py
 ```
 
 ### 2. 抓取指定日期范围
 使用 `--start-date` 和 `--end-date` 参数（格式：`YYYY-MM-DD`）。
 ```bash
-python ygp_crawler.py --start-date 2026-02-01 --end-date 2026-02-04
+python main.py --start-date 2026-02-01 --end-date 2026-02-04
+```
+
+**示例：抓取最近7天的数据**
+```bash
+python main.py --start-date 2026-01-29 --end-date 2026-02-05
 ```
 
 ### 3. 自定义输出文件路径
 使用 `-o` 或 `--output` 参数指定输出 CSV 文件的路径（默认为 `results.csv`）。
 ```bash
-python ygp_crawler.py --start-date 2026-02-01 --end-date 2026-02-04 -o my_data.csv
+python main.py --start-date 2026-02-01 --end-date 2026-02-04 -o my_data.csv
 ```
 
-### 4. 增量爬取
+### 4. 增量爬取（默认开启）
-使用 `-i` 或 `--incremental` 参数启用增量爬取模式。脚本会自动读取已有 CSV 文件，计算时间范围，只抓取新数据。
+脚本默认启用增量爬取模式。会自动读取已有 CSV 文件，计算时间范围，只抓取新数据。
 
 **自动计算日期范围（推荐）**：
 ```bash
 # 自动从已有数据的最新日期+1开始，爬取到今天
-python ygp_crawler.py -i
+python main.py
 ```
 
 **手动指定日期范围**：
 ```bash
-# 在增量模式下手动指定日期范围
+# 手动指定日期范围（仍会去重）
-python ygp_crawler.py -i --start-date 2026-02-01 --end-date 2026-02-04
+python main.py --start-date 2026-02-01 --end-date 2026-02-04
+```
+
+**全量查询**：
+```bash
+# 删除 CSV 文件后运行，即可进行全量查询
+rm results.csv
+python main.py
 ```
 
 **增量爬取特性**：

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assets/index-da9d468e.js

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+import{aa as c,ab as _,bf as h,o as n,b as r,e as t,f as e,ag as u,a2 as g,b7 as k,c as f,aS as $,$ as p,d as v,E as i,a0 as C,t as w,j as B,aj as N}from"./index-f1c6abff.js";const V={viewBox:"0 0 79 86",version:"1.1",xmlns:"http://www.w3.org/2000/svg","xmlns:xlink":"http://www.w3.org/1999/xlink"},x=["id"],E=["stop-color"],b=["stop-color"],R=["id"],S=["stop-color"],G=["stop-color"],I=["id"],z={id:"Illustrations",stroke:"none","stroke-width":"1",fill:"none","fill-rule":"evenodd"},j={id:"B-type",transform:"translate(-1268.000000, -535.000000)"},D={id:"Group-2",transform:"translate(1268.000000, 535.000000)"},M=["fill"],P=["fill"],L={id:"Group-Copy",transform:"translate(34.500000, 31.500000) scale(-1, 1) rotate(-25.000000) translate(-34.500000, -31.500000) translate(7.000000, 10.000000)"},O=["fill"],T=["fill"],U=["fill"],Z=["fill"],q=["fill"],A={id:"Rectangle-Copy-17",transform:"translate(53.000000, 45.000000)"},F=["fill","xlink:href"],H=["fill","mask"],J=["fill"],K=c({name:"ImgEmpty"}),Q=c({...K,setup(d){const s=_("empty"),l=h();return(a,m)=>(n(),r("svg",V,[t("defs",null,[t("linearGradient",{id:`linearGradient-1-${e(l)}`,x1:"38.8503086%",y1:"0%",x2:"61.1496914%",y2:"100%"},[t("stop",{"stop-color":`var(${e(s).cssVarBlockName("fill-color-1")})`,offset:"0%"},null,8,E),t("stop",{"stop-color":`var(${e(s).cssVarBlockName("fill-color-4")})`,offset:"100%"},null,8,b)],8,x),t("linearGradient",{id:`linearGradient-2-${e(l)}`,x1:"0%",y1:"9.5%",x2:"100%",y2:"90.5%"},[t("stop",{"stop-color":`var(${e(s).cssVarBlockName("fill-color-1")})`,offset:"0%"},null,8,S),t("stop",{"stop-color":`var(${e(s).cssVarBlockName("fill-color-6")})`,offset:"100%"},null,8,G)],8,R),t("rect",{id:`path-3-${e(l)}`,x:"0",y:"0",width:"17",height:"36"},null,8,I)]),t("g",z,[t("g",j,[t("g",D,[t("path",{id:"Oval-Copy-2",d:"M39.5,86 C61.3152476,86 79,83.9106622 79,81.3333333 C79,78.7560045 57.3152476,78 35.5,78 C13.6847524,78 0,78.7560045 0,81.3333333 C0,83.9106622 17.6847524,86 39.5,86 Z",fill:`var(${e(s).cssVarBlockName("fill-color-3")})`},null,8,M),t("polygon",{id:"Rectangle-Copy-14",fill:`var(${e(s).cssVarBlockName("fill-color-7")})`,transform:"translate(27.500000, 51.500000) scale(1, -1) translate(-27.500000, -51.500000) ",points:"13 58 53 58 42 45 2 45"},null,8,P),t("g",L,[t("polygon",{id:"Rectangle-Copy-10",fill:`var(${e(s).cssVarBlockName("fill-color-7")})`,transform:"translate(11.500000, 5.000000) scale(1, -1) translate(-11.500000, -5.000000) ",points:"2.84078316e-14 3 18 3 23 7 5 7"},null,8,O),t("polygon",{id:"Rectangle-Copy-11",fill:`var(${e(s).cssVarBlockName("fill-color-5")})`,points:"-3.69149156e-15 7 38 7 38 43 -3.69149156e-15 43"},null,8,T),t("rect",{id:"Rectangle-Copy-12",fill:`url(#linearGradient-1-${e(l)})`,transform:"translate(46.500000, 25.000000) scale(-1, 1) translate(-46.500000, -25.000000) ",x:"38",y:"7",width:"17",height:"36"},null,8,U),t("polygon",{id:"Rectangle-Copy-13",fill:`var(${e(s).cssVarBlockName("fill-color-2")})`,transform:"translate(39.500000, 3.500000) scale(-1, 1) translate(-39.500000, -3.500000) ",points:"24 7 41 7 55 -3.63806207e-12 38 -3.63806207e-12"},null,8,Z)]),t("rect",{id:"Rectangle-Copy-15",fill:`url(#linearGradient-2-${e(l)})`,x:"13",y:"45",width:"40",height:"36"},null,8,q),t("g",A,[t("use",{id:"Mask",fill:`var(${e(s).cssVarBlockName("fill-color-8")})`,transform:"translate(8.500000, 18.000000) scale(-1, 1) translate(-8.500000, -18.000000) ","xlink:href":`#path-3-${e(l)}`},null,8,F),t("polygon",{id:"Rectangle-Copy",fill:`var(${e(s).cssVarBlockName("fill-color-9")})`,mask:`url(#mask-4-${e(l)})`,transform:"translate(12.000000, 9.000000) scale(-1, 1) translate(-12.000000, -9.000000) ",points:"7 0 24 0 20 18 7 16.5"},null,8,H)]),t("polygon",{id:"Rectangle-Copy-18",fill:`var(${e(s).cssVarBlockName("fill-color-2")})`,transform:"translate(66.000000, 51.500000) scale(-1, 1) translate(-66.000000, -51.500000) ",points:"62 45 79 45 70 58 53 58"},null,8,J)])])])]))}});var W=u(Q,[["__file","/home/runner/work/element-plus/element-plus/packages/components/empty/src/img-empty.vue"]]);const X=g({image:{type:String,default:""},imageSize:Number,description:{type:String,default:""}}),Y=["src"],t0={key:1},e0=c({name:"ElEmpty"}),s0=c({...e0,props:X,setup(d){const s=d,{t:l}=k(),a=_("empty"),m=f(()=>s.description||l("el.table.emptyText")),y=f(()=>({width:$(s.imageSize)}));return(o,o0)=>(n(),r("div",{class:i(e(a).b())},[t("div",{class:i(e(a).e("image")),style:C(e(y))},[o.image?(n(),r("img",{key:0,src:o.image,ondragstart:"return false"},null,8,Y)):p(o.$slots,"image",{key:1},()=>[v(W)])],6),t("div",{class:i(e(a).e("description"))},[o.$slots.description?p(o.$slots,"description",{key:0}):(n(),r("p",t0,w(e(m)),1))],2),o.$slots.default?(n(),r("div",{key:0,class:i(e(a).e("bottom"))},[p(o.$slots,"default")],2)):B("v-if",!0)],2))}});var l0=u(s0,[["__file","/home/runner/work/element-plus/element-plus/packages/components/empty/src/empty.vue"]]);const n0=N(l0);export{n0 as E};

assets/index-ff57e0d0.js

@@ -0,0 +1 @@
+import{A as d,c as f,r as l,z as v,K as h,L as N,o as m,b as z,d as n,n as S,F as b,_ as x,M as w,O as B,N as C,P as D}from"./index-f1c6abff.js";import{_ as k}from"./Banner-1ed718fb.js";import{J as q,a as F}from"./JyggList-964ba23f.js";import{y as J}from"./api-f26de41c.js";import"./default-1fc3bc07.js";import"./index-a98c37f5.js";import"./KeyCode-222bce94.js";import"./index-f29230c3.js";import"./addEventListener-88586f3d.js";import"./objectDestructuringEmpty-a5c19c06.js";/* empty css                 */import"./JyggDateFilter-b9da602b.js";/* empty css                 *//* empty css                */import"./arrow-down-bold-62f05036.js";/* empty css                 */import"./dateParse-086bcd39.js";import"./useJump-b2a96f17.js";import"./index-da9d468e.js";const Z={__name:"index",setup(L){const i=d();i.getBannerConfig("交易公告");const r=f(()=>i.banner),o=l({type:"trading-type",openConvert:!1});v(o,a=>{t.pageNo=1,p(a)});const t=h({total:0,pageNo:1,pageSize:10});function g(a){t.pageNo=a,p()}const s=l([]),p=N(async(a=o.value)=>{const e=await J.getJyggList({...a,pageNo:t.pageNo,pageSize:t.pageSize});s.value=e.pageData,t.total=+e.total},500);return(a,e)=>{const c=x,u=k,_=D;return m(),z(b,null,[n(c),n(u,{title:r.value.name,subtitle:r.value.description},null,8,["title","subtitle"]),n(q,{query:o.value,"onUpdate:query":e[0]||(e[0]=y=>o.value=y)},{default:S(()=>[n(F,{"list-data":s.value},null,8,["list-data"]),w((m(),C(_,{key:Math.random(),class:"mt-6",total:t.total,index:t.pageNo,onChange:g,"page-size":t.pageSize},null,8,["total","index","page-size"])),[[B,t.total>0]])]),_:1},8,["query"])],64)}}};export{Z as default};

assets/objectDestructuringEmpty-a5c19c06.js

@@ -0,0 +1,18 @@
+import{d as p,n as l}from"./default-1fc3bc07.js";var m=`accept acceptcharset accesskey action allowfullscreen allowtransparency
+alt async autocomplete autofocus autoplay capture cellpadding cellspacing challenge
+charset checked classid classname colspan cols content contenteditable contextmenu
+controls coords crossorigin data datetime default defer dir disabled download draggable
+enctype form formaction formenctype formmethod formnovalidate formtarget frameborder
+headers height hidden high href hreflang htmlfor for httpequiv icon id inputmode integrity
+is keyparams keytype kind label lang list loop low manifest marginheight marginwidth max maxlength media
+mediagroup method min minlength multiple muted name novalidate nonce open
+optimum pattern placeholder poster preload radiogroup readonly rel required
+reversed role rowspan rows sandbox scope scoped scrolling seamless selected
+shape size sizes span spellcheck src srcdoc srclang srcset start step style
+summary tabindex target title type usemap value width wmode wrap`,h=`onCopy onCut onPaste onCompositionend onCompositionstart onCompositionupdate onKeydown
+    onKeypress onKeyup onFocus onBlur onChange onInput onSubmit onClick onContextmenu onDoubleclick onDblclick
+    onDrag onDragend onDragenter onDragexit onDragleave onDragover onDragstart onDrop onMousedown
+    onMouseenter onMouseleave onMousemove onMouseout onMouseover onMouseup onSelect onTouchcancel
+    onTouchend onTouchmove onTouchstart onTouchstartPassive onTouchmovePassive onScroll onWheel onAbort onCanplay onCanplaythrough
+    onDurationchange onEmptied onEncrypted onEnded onError onLoadeddata onLoadedmetadata
+    onLoadstart onPause onPlay onPlaying onProgress onRatechange onSeeked onSeeking onStalled onSuspend onTimeupdate onVolumechange onWaiting onLoad onError`,s="".concat(m," ").concat(h).split(/[\s\n]+/),f="aria-",g="data-";function d(n,e){return n.indexOf(e)===0}function b(n){var e=arguments.length>1&&arguments[1]!==void 0?arguments[1]:!1,o;e===!1?o={aria:!0,data:!0,attr:!0}:e===!0?o={aria:!0}:o=p({},e);var t={};return Object.keys(n).forEach(function(a){(o.aria&&(a==="role"||d(a,f))||o.data&&d(a,g)||o.attr&&(s.includes(a)||s.includes(a.toLowerCase())))&&(t[a]=n[a])}),t}var E=function(){return l()&&window.document.documentElement},u=function(e){if(l()&&window.document.documentElement){var o=Array.isArray(e)?e:[e],t=window.document.documentElement;return o.some(function(a){return a in t.style})}return!1},v=function(e,o){if(!u(e))return!1;var t=document.createElement("div"),a=t.style[e];return t.style[e]=o,t.style[e]!==a};function C(n,e){return!Array.isArray(n)&&e!==void 0?v(n,e):u(n)}var i;function y(n){if(typeof document>"u")return 0;if(n||i===void 0){var e=document.createElement("div");e.style.width="100%",e.style.height="200px";var o=document.createElement("div"),t=o.style;t.position="absolute",t.top="0",t.left="0",t.pointerEvents="none",t.visibility="hidden",t.width="200px",t.height="150px",t.overflow="hidden",o.appendChild(e),document.body.appendChild(o);var a=e.offsetWidth;o.style.overflow="scroll";var r=e.offsetWidth;a===r&&(r=o.clientWidth),document.body.removeChild(o),i=a-r}return i}function c(n){var e=n.match(/^(.*)px$/),o=Number(e==null?void 0:e[1]);return Number.isNaN(o)?y():o}function S(n){if(typeof document>"u"||!n||!(n instanceof Element))return{width:0,height:0};var e=getComputedStyle(n,"::-webkit-scrollbar"),o=e.width,t=e.height;return{width:c(o),height:c(t)}}function x(n){if(n==null)throw new TypeError("Cannot destructure "+n)}export{x as _,S as a,E as c,y as g,C as i,b as p};

assets/useJump-b2a96f17.js

@@ -0,0 +1 @@
+import{y as u,u as y,cK as l,Q as f}from"./index-f1c6abff.js";const C=()=>{u();const i=y();async function a(e){const t=await l.getAgendaDetail(e.recordId);if(!t||!t.version){f.info("当前交易日程未发布相关交易公告信息");return}const n=t.pubServicePlat,o=e.tradingType;if(e.edition==="v0"){const{href:p}=i.resolve({name:"交易公告V0",params:{infoId:t.noticeId},query:{source:n,titleDetails:o}});window.open(p);return}if(!t.tradingType)return;const c={edition:t.version,tradingType:t.tradingType},s={noticeId:t.noticeId,projectCode:t.projectCode,bizCode:t.bizCode,siteCode:t.siteCode,publishDate:t.publishDate||t.date,source:n,titleDetails:o,classify:t.projectType??e.noticeType},{href:r}=i.resolve({name:"交易公告详情-new",params:c,query:s});window.open(r)}function d(e){const t=e.pubServicePlat,n=e.noticeSecondTypeDesc;if(e.edition==="v0"){const{href:r}=i.resolve({name:"交易公告V0",params:{infoId:e.noticeId},query:{source:t,titleDetails:n}});window.open(r);return}const o={edition:e.edition,tradingType:e.noticeSecondType},c={noticeId:e.noticeId,projectCode:e.projectCode,bizCode:e.tradingProcess,siteCode:e.regionCode,publishDate:e.publishDate,source:t,titleDetails:n,classify:e.projectType},{href:s}=i.resolve({name:"交易公告详情-new",params:o,query:c});return window.open(s),s}return{jyrcJump:a,jygkJump:d}};export{C as u};

examples/list-request.sh

@@ -1,20 +1,20 @@
 curl 'https://ygp.gdzwfw.gov.cn/ggzy-portal/search/v2/items' \
-  -H 'Accept: application/json, text/plain, */*' \
-  -H 'Accept-Language: zh-CN,zh;q=0.9' \
   -H 'Connection: keep-alive' \
-  -H 'Content-Type: application/json' \
+  -b '_horizon_uid=ec39e18f-7968-4277-afeb-0bea42d5de45; _horizon_sid=0f61bd04-5719-467b-8f3a-4c2fb2208da4' \
-  -b '_horizon_sid=85f7f27a-a1ca-4d3b-87b1-9c733b1d846c; _horizon_uid=ec39e18f-7968-4277-afeb-0bea42d5de45' \
   -H 'Origin: https://ygp.gdzwfw.gov.cn' \
   -H 'Referer: https://ygp.gdzwfw.gov.cn/' \
   -H 'Sec-Fetch-Dest: empty' \
   -H 'Sec-Fetch-Mode: cors' \
   -H 'Sec-Fetch-Site: same-origin' \
   -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36' \
-  -H 'X-Dgi-Req-App: ggzy-portal' \
+  -H 'accept: application/json, text/plain, */*' \
-  -H 'X-Dgi-Req-Nonce: xHui3fC2RmcIuHyQ' \
+  -H 'accept-language: zh-CN,zh;q=0.9' \
-  -H 'X-Dgi-Req-Signature: ccd2c2a549d3ea1932cb4e843715be6c414af04b1f025ca62686913efb5b3d39' \
+  -H 'content-type: application/json' \
-  -H 'X-Dgi-Req-Timestamp: 1770198773779' \
   -H 'sec-ch-ua: "Not(A:Brand";v="8", "Chromium";v="144", "Google Chrome";v="144"' \
   -H 'sec-ch-ua-mobile: ?0' \
   -H 'sec-ch-ua-platform: "macOS"' \
-  --data-raw '{"type":"trading-type","openConvert":false,"keyword":"","siteCode":"44","secondType":"A","tradingProcess":"","thirdType":"[]","projectType":"","publishStartTime":"","publishEndTime":"","pageNo":2,"pageSize":10}'
+  -H 'x-dgi-req-app: ggzy-portal' \
+  -H 'x-dgi-req-nonce: fCuDiZcgnqabdAfT' \
+  -H 'x-dgi-req-signature: 73c3b89179feda9eeb62397c326c440be997a8aa9eab5387820b8642f2c72b79' \
+  -H 'x-dgi-req-timestamp: 1770220343291' \
+  --data-raw '{"type":"trading-type","openConvert":false,"keyword":"","siteCode":"44","secondType":"A","tradingProcess":"513,2C52,3C52","thirdType":"[]","projectType":"","publishStartTime":"20251106000000","publishEndTime":"20260204235959","pageNo":1,"pageSize":50}'

main.py

@@ -22,7 +22,6 @@ def parse_args():
     parser.add_argument("--start-date", help="开始日期 (YYYY-MM-DD)")
     parser.add_argument("--end-date", help="结束日期 (YYYY-MM-DD)")
     parser.add_argument("--output", "-o", default="results.csv", help="输出CSV文件路径 (默认: results.csv)")
-    parser.add_argument("--incremental", "-i", action="store_true", help="启用增量爬取模式")
     return parser.parse_args()
 
 
@@ -72,7 +71,7 @@ def read_existing_csv(csv_path):
     max_date = None
 
     try:
-        with open(csv_path, "r", encoding="utf-8", newline="") as f:
+        with open(csv_path, "r", encoding="utf-8-sig", newline="") as f:
             reader = csv.reader(f)
             header = next(reader, None)  # Skip header
             if not header:
@@ -125,71 +124,50 @@ def construct_detail_url(item):
     return f"{base_url}?{query}"
 
 
-def build_search_payload(page_num=1, page_size=10):
+def build_search_payload(page_num=1, publish_start_time="", publish_end_time=""):
-    """Build the search API payload."""
+    """Build the search API payload.
+
+    Args:
+        page_num: Page number
+        publish_start_time: Start time in format YYYYMMDDHHMMSS
+        publish_end_time: End time in format YYYYMMDDHHMMSS
+    """
     return {
         "pageNo": page_num,
-        "pageSize": page_size,
+        "pageSize": 50,  # Fixed page size 50
         "keyword": "",
         "siteCode": "44",
         "secondType": "",
-        "tradingProcess": "",
+        "tradingProcess": "513,2C52,3C52",  # Fixed to search for 中标结果
         "thirdType": "[]",
         "projectType": "",
-        "publishStartTime": "",
+        "publishStartTime": publish_start_time,  # Format: YYYYMMDDHHMMSS
-        "publishEndTime": "",
+        "publishEndTime": publish_end_time,      # Format: YYYYMMDDHHMMSS
         "type": "trading-type"
     }
 
 
-def process_items(items, start_date, end_date):
+def process_items(items):
-    """Process a batch of items and filter by date and keyword."""
+    """Process a batch of items - API already filters by tradingProcess and date range."""
     page_results = []
-    stop_signal = False
-    min_date_on_page = None
 
     for item in items:
         title = item.get("noticeTitle", "")
         pub_date_str = item.get("publishDate", "")
-        item_date = parse_api_date(pub_date_str)
 
-        if item_date:
-            if min_date_on_page is None or item_date < min_date_on_page:
-                min_date_on_page = item_date
-
-            if item_date > end_date:
-                continue
-            if item_date < start_date:
-                continue
-
-        if "中标结果" in title:
         page_results.append({
             "项目标题": title,
             "发布时间": format_datetime(pub_date_str),
             "详细链接": construct_detail_url(item)
         })
 
-    # Only stop if all items on this page are older than start_date
+    return page_results
-    # and there are no matching results
-    if min_date_on_page and min_date_on_page < start_date and not page_results:
-        # Check if the newest item is also older than start_date
-        max_date_on_page = None
-        for item in items:
-            item_date = parse_api_date(item.get("publishDate", ""))
-            if item_date:
-                if max_date_on_page is None or item_date > max_date_on_page:
-                    max_date_on_page = item_date
-
-        if max_date_on_page and max_date_on_page < start_date:
-            stop_signal = True
-
-    return page_results, stop_signal
 
 
-async def fetch_page(session, page_num, page_size=10):
+async def fetch_page(session, page_num, publish_start_time="", publish_end_time=""):
     """Fetch a single page of data from the API."""
     url = f"{API_BASE_URL}/search/v2/items"
-    payload = build_search_payload(page_num, page_size)
+    payload = build_search_payload(page_num, publish_start_time, publish_end_time)
 
     headers = {
         "Content-Type": "application/json",
@@ -227,19 +205,26 @@ def deduplicate_results(new_results, existing_data):
     return unique_results
 
 
+def format_api_datetime(dt):
+    """Format datetime to API format YYYYMMDDHHMMSS."""
+    return dt.strftime("%Y%m%d%H%M%S")
+
+
 async def run():
     args = parse_args()
 
     today = date.today()
-    start_date = today
+    # Default: last 3 months
+    three_months_ago = today - timedelta(days=90)
+    start_date = three_months_ago
     end_date = today
 
-    # Read existing CSV if in incremental mode
+    # Always use incremental mode - read existing CSV if exists
     existing_data = []
     csv_min_date = None
     csv_max_date = None
 
-    if args.incremental and os.path.exists(args.output):
+    if os.path.exists(args.output):
         existing_data, csv_min_date, csv_max_date = read_existing_csv(args.output)
         if csv_min_date and csv_max_date:
             print(f"Existing data range: {csv_min_date} to {csv_max_date}", file=sys.stderr)
@@ -252,8 +237,8 @@ async def run():
         except ValueError:
             print(f"Error: Invalid start date format: {args.start_date}", file=sys.stderr)
             sys.exit(1)
-    elif args.incremental and csv_max_date:
+    elif csv_max_date:
-        # In incremental mode without explicit start_date, fetch from max_date+1 to today
+        # Without explicit start_date, fetch from max_date+1 to today
         start_date = csv_max_date + timedelta(days=1)
 
     if args.end_date:
@@ -268,10 +253,15 @@ async def run():
         print(f"Existing records: {len(existing_data)}", file=sys.stderr)
         sys.exit(0)
 
+    # Format time for API: YYYYMMDDHHMMSS
+    start_datetime = datetime.combine(start_date, datetime.min.time())
+    end_datetime = datetime.combine(end_date, datetime.max.time().replace(microsecond=0))
+    publish_start_time = format_api_datetime(start_datetime)
+    publish_end_time = format_api_datetime(end_datetime)
+
     print(f"Crawling range: {start_date} to {end_date}", file=sys.stderr)
+    print(f"API time range: {publish_start_time} to {publish_end_time}", file=sys.stderr)
     print(f"Output file: {args.output}", file=sys.stderr)
-    if args.incremental:
-        print(f"Incremental mode: ON", file=sys.stderr)
 
     # Collect all new results first
     new_results = []
@@ -284,7 +274,7 @@ async def run():
 
             await delay(500)
 
-            resp = await fetch_page(session, page_num)
+            resp = await fetch_page(session, page_num, publish_start_time, publish_end_time)
 
             if resp is None:
                 print("Failed to fetch data. Stopping.", file=sys.stderr)
@@ -297,7 +287,7 @@ async def run():
                 print("No more items.", file=sys.stderr)
                 break
 
-            results, stop = process_items(items, start_date, end_date)
+            results = process_items(items)
             new_results.extend(results)
 
             # Print to console immediately
@@ -305,10 +295,6 @@ async def run():
                 print(json.dumps(r, ensure_ascii=False))
                 sys.stdout.flush()
 
-            if stop:
-                print("Date range satisfied. Stopping.", file=sys.stderr)
-                break
-
             pages = data.get("pageTotal", 0)
 
             if page_num >= pages:
@@ -320,14 +306,15 @@ async def run():
 
     print(f"\nNew results fetched: {len(new_results)}", file=sys.stderr)
 
-    # Deduplicate if in incremental mode
+    # Always deduplicate against existing data
-    if args.incremental and existing_data:
+    if existing_data:
         new_results = deduplicate_results(new_results, existing_data)
         print(f"After deduplication: {len(new_results)}", file=sys.stderr)
 
     # Write to CSV: new data first, then existing data
-    with open(args.output, "w", newline="", encoding="utf-8") as csv_file:
+    # Use utf-8-sig to add BOM for Excel to auto-detect encoding and delimiter
-        csv_writer = csv.writer(csv_file)
+    with open(args.output, "w", newline="", encoding="utf-8-sig") as csv_file:
+        csv_writer = csv.writer(csv_file, delimiter=",", quoting=csv.QUOTE_MINIMAL)
         csv_writer.writerow(["项目标题", "发布时间", "详细链接"])
 
         # Write new results first (newer data)