feat: 初始化 AgricultureQA 农技智能问答应用

- 搭建基于 Qwen3.5 的 Streamlit 农业技术知识问答应用 - 支持思维链推理展示与模型参数调节 - 新增项目核心文件：app.py、config.py、main.py - 新增工程化配置：pyproject.toml、justfile、Dockerfile、.gitignore - 完善 README 文档，包含快速开始、部署说明及项目结构
2026-04-13 16:49:12 +08:00
parent 972c568a66
commit 256fe12605
9 changed files with 1142 additions and 2 deletions
--- a/app.py
+++ b/app.py
@@ -0,0 +1,265 @@
+"""
+农技智能问答
+基于 Qwen3.5 大模型的农业技术知识问答应用
+"""
+
+import httpx
+import streamlit as st
+from config import CHAT_API_URL, CHAT_MODEL, HEADERS
+
+# ─── Page Config ────────────────────────────────────────────────────────────
+st.set_page_config(
+    page_title="农技智能问答",
+    page_icon="🌾",
+    layout="wide",
+    initial_sidebar_state="expanded",
+)
+
+# ─── Custom CSS ──────────────────────────────────────────────────────────────
+st.markdown("""
+<style>
+:root {
+    --bg-dark: #0a1628;
+    --bg-card: #0f2040;
+    --accent-green: #4ade80;
+    --accent-gold: #f59e0b;
+    --accent-blue: #38bdf8;
+    --text-primary: #e2e8f0;
+    --text-muted: #64748b;
+    --border: rgba(74, 222, 128, 0.2);
+}
+
+html, body, [class*="css"] {
+    font-family: "PingFang SC", "Microsoft YaHei", "Noto Serif SC", serif;
+    background-color: var(--bg-dark);
+    color: var(--text-primary);
+}
+
+.stApp {
+    background: linear-gradient(135deg, #0a1628 0%, #0d1f3c 50%, #091520 100%);
+}
+
+/* Sidebar */
+[data-testid="stSidebar"] {
+    background: linear-gradient(180deg, #0f2040 0%, #0a1628 100%);
+    border-right: 1px solid var(--border);
+}
+[data-testid="stSidebar"] .stSlider label,
+[data-testid="stSidebar"] .stCheckbox label {
+    color: var(--accent-green) !important;
+    font-size: 0.82rem;
+    font-family: "JetBrains Mono", "Fira Code", "Source Code Pro", monospace;
+    letter-spacing: 0.05em;
+}
+
+/* Section headers */
+.section-header {
+    font-size: 0.75rem;
+    font-family: "JetBrains Mono", "Fira Code", "Source Code Pro", monospace;
+    letter-spacing: 0.15em;
+    color: var(--accent-gold);
+    text-transform: uppercase;
+    border-bottom: 1px solid rgba(245,158,11,0.3);
+    padding-bottom: 6px;
+    margin-bottom: 16px;
+    margin-top: 24px;
+}
+
+/* Hero title */
+.hero-title {
+    font-size: 2rem;
+    font-weight: 700;
+    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+    line-height: 1.2;
+}
+.hero-sub {
+    font-family: "JetBrains Mono", "Fira Code", "Source Code Pro", monospace;
+    font-size: 0.8rem;
+    color: var(--text-muted);
+    letter-spacing: 0.1em;
+    margin-top: 4px;
+}
+
+/* Answer card */
+.answer-card {
+    background: linear-gradient(135deg, #0f2040, #132b55);
+    border: 1px solid var(--border);
+    border-radius: 12px;
+    padding: 24px;
+    margin: 16px 0;
+    line-height: 1.8;
+}
+.answer-card h3 {
+    color: var(--accent-green);
+    font-family: "JetBrains Mono", "Fira Code", "Source Code Pro", monospace;
+    font-size: 0.85rem;
+    letter-spacing: 0.08em;
+    margin-bottom: 12px;
+}
+
+/* Thinking card */
+.thinking-card {
+    background: rgba(56, 189, 248, 0.05);
+    border: 1px solid rgba(56, 189, 248, 0.2);
+    border-radius: 10px;
+    padding: 18px;
+    margin: 12px 0;
+}
+
+/* Token usage */
+.token-usage {
+    font-family: "JetBrains Mono", "Fira Code", "Source Code Pro", monospace;
+    font-size: 0.78rem;
+    color: var(--text-muted);
+    background: rgba(255,255,255,0.03);
+    border-radius: 6px;
+    padding: 8px 14px;
+    margin-top: 12px;
+    display: inline-block;
+}
+
+/* Quick question buttons */
+[data-testid="stSidebar"] button[kind="secondary"] {
+    background: rgba(74,222,128,0.08);
+    border: 1px solid rgba(74,222,128,0.2);
+    color: var(--text-primary);
+    font-size: 0.82rem;
+    text-align: left;
+    white-space: normal;
+    line-height: 1.4;
+    transition: all 0.2s ease;
+}
+[data-testid="stSidebar"] button[kind="secondary"]:hover {
+    background: rgba(74,222,128,0.15);
+    border-color: rgba(74,222,128,0.4);
+}
+
+/* Override streamlit slider colors */
+.stSlider [data-baseweb="slider"] [data-testid="stTickBarMin"],
+.stSlider [data-baseweb="slider"] [data-testid="stTickBarMax"] {
+    color: var(--text-muted);
+}
+
+/* Alert boxes */
+.alert-error {
+    background: rgba(239,68,68,0.1);
+    border-left: 3px solid #ef4444;
+    border-radius: 0 8px 8px 0;
+    padding: 12px 16px;
+    margin: 8px 0;
+    font-size: 0.9rem;
+}
+</style>
+""", unsafe_allow_html=True)
+
+
+# ─── Quick Questions ─────────────────────────────────────────────────────────
+QUICK_QUESTIONS = [
+    "水稻稻瘟病怎么防治？什么时候打药效果最好？",
+    "小麦叶片上出现铁锈色的粉状物是什么病？怎么处理？",
+    "如何判断玉米是否需要灌溉？有哪些判断方法？",
+    "如何种榴莲？怎样成熟快？",
+]
+
+
+# ─── Sidebar ─────────────────────────────────────────────────────────────────
+with st.sidebar:
+    st.markdown('<div class="hero-title">🌾 农技问答</div>', unsafe_allow_html=True)
+    st.markdown('<div class="hero-sub">AGRICULTURE QA SYSTEM v1.0</div>', unsafe_allow_html=True)
+    st.markdown("---")
+
+    st.markdown('<div class="section-header">⚙️ 模型参数</div>', unsafe_allow_html=True)
+    temperature = st.slider("Temperature", 0.0, 1.0, 0.7, 0.1)
+    top_p = st.slider("Top P", 0.0, 1.0, 0.8, 0.1)
+    enable_thinking = st.checkbox("开启思维链", value=True)
+
+    st.markdown('<div class="section-header">💡 快捷提问</div>', unsafe_allow_html=True)
+    for q in QUICK_QUESTIONS:
+        if st.button(q, key=q):
+            st.session_state.user_input = q
+
+
+# ─── Main Layout ─────────────────────────────────────────────────────────────
+st.markdown("""
+<div style="display:flex; align-items:baseline; gap:16px; margin-bottom:4px;">
+  <div class="hero-title">农技智能问答</div>
+</div>
+<div class="hero-sub">Powered by Qwen3.5 &nbsp;|&nbsp; 支持思维链推理的农业技术知识问答</div>
+""", unsafe_allow_html=True)
+
+st.markdown("<br>", unsafe_allow_html=True)
+
+# 输入区域
+user_input = st.text_area(
+    "请输入您的农业问题：",
+    value=st.session_state.get("user_input", ""),
+    height=120,
+    placeholder="例如：水稻稻瘟病怎么防治？",
+)
+
+if st.button("提交", type="primary") and user_input.strip():
+    with st.spinner("模型正在思考中..."):
+        try:
+            payload = {
+                "model": CHAT_MODEL,
+                "messages": [{"role": "user", "content": user_input.strip()}],
+                "temperature": temperature,
+                "top_p": top_p,
+                "presence_penalty": 1.5,
+                "chat_template_kwargs": {"enable_thinking": enable_thinking},
+            }
+            resp = httpx.post(
+                CHAT_API_URL, headers=HEADERS, json=payload, timeout=120
+            )
+            resp.raise_for_status()
+            data = resp.json()
+
+            choice = data["choices"][0]["message"]
+            reasoning = choice.get("reasoning_content", "")
+            content = choice["content"]
+            usage = data["usage"]
+
+            # 显示回答
+            st.markdown(f"""
+            <div class="answer-card">
+                <h3>💬 模型回答</h3>
+                <div style="color: var(--text-primary); font-size: 0.95rem;">{content}</div>
+            </div>
+            """, unsafe_allow_html=True)
+
+            # 显示思考过程（可折叠）
+            if reasoning and enable_thinking:
+                with st.expander("🧠 查看思考过程"):
+                    st.markdown(reasoning)
+
+            # Token 用量
+            st.markdown(f"""
+            <div class="token-usage">
+                Token 用量 — 输入: {usage['prompt_tokens']} | \
+                输出: {usage['completion_tokens']} | \
+                合计: {usage['total_tokens']}
+            </div>
+            """, unsafe_allow_html=True)
+
+        except httpx.HTTPStatusError as e:
+            st.markdown(
+                f'<div class="alert-error">请求失败 (HTTP {e.response.status_code}): {e.response.text}</div>',
+                unsafe_allow_html=True,
+            )
+        except Exception as e:
+            st.markdown(
+                f'<div class="alert-error">请求异常: {e}</div>',
+                unsafe_allow_html=True,
+            )
+
+# ─── Footer ───────────────────────────────────────────────────────────────────
+st.markdown("<br>", unsafe_allow_html=True)
+st.markdown("""
+<div style="text-align:center; font-family:'JetBrains Mono',monospace; font-size:0.72rem;
+            color:#334155; padding:16px; border-top:1px solid rgba(74,222,128,0.1);">
+  Qwen3.5 + Thinking Chain &nbsp;|&nbsp; 农技智能问答系统
+</div>
+""", unsafe_allow_html=True)