Fix composite margin ratio cap at 50% and add risk guide page with nav toggle.

Co-authored-by: Cursor <cursoragent@cursor.com>

templates/base.html

@@ -82,6 +82,7 @@
             <nav class="site-nav" id="site-nav">
                 <a href="{{ url_for('positions') }}" class="{% if request.endpoint in ('positions', 'trade_page', 'recommend_page') %}active{% endif %}">下单监控</a>
                 {% if nav_items.dashboard %}<a href="{{ url_for('dashboard') }}" class="{% if request.endpoint == 'dashboard' %}active{% endif %}">数据看板</a>{% endif %}
+                {% if nav_items.risk_guide %}<a href="{{ url_for('risk_guide') }}" class="{% if request.endpoint == 'risk_guide' %}active{% endif %}">风控说明</a>{% endif %}
                 {% if nav_items.strategy %}<a href="{{ url_for('strategy_page') }}" class="{% if request.endpoint in ('strategy_page', 'strategy_records_page') %}active{% endif %}">策略交易</a>{% endif %}
                 {% if nav_items.plans %}<a href="{{ url_for('plans') }}" class="{% if request.endpoint == 'plans' %}active{% endif %}">开单计划</a>{% endif %}
                 <a href="{{ url_for('keys') }}" class="{% if request.endpoint == 'keys' %}active{% endif %}">关键位监控</a>

templates/dashboard.html

@@ -35,7 +35,11 @@
     <div class="card dashboard-section dashboard-risk-card">
         <h2 class="dashboard-risk-heading">
             风控说明
+            {% if nav_items.risk_guide %}
+            <a class="dash-risk-doc-link" href="{{ url_for('risk_guide') }}">完整说明</a>
+            {% else %}
             <span class="text-muted dash-risk-doc-ref">· 详见 <code>docs/风控说明.md</code></span>
+            {% endif %}
         </h2>
         <p class="dashboard-risk-reason" id="dash-risk-reason">加载中…</p>
         <div class="stat-grid stat-grid-summary dashboard-risk-grid" id="dash-risk-grid"></div>

templates/risk_guide.html

@@ -0,0 +1,13 @@
+{# Copyright (c) 2025-2026 马建军. All rights reserved. 专有软件，详见 LICENSE.zh-CN.txt #}
+{% extends "base.html" %}
+{% block title %}风控说明 - 国内期货 · 交易复盘系统{% endblock %}
+{% block extra_css %}
+<link rel="stylesheet" href="{{ url_for('static', filename='css/doc.css') }}?v={{ asset_v }}">
+{% endblock %}
+{% block content %}
+<div class="card doc-page">
+    <article class="doc-content">
+        {{ doc_html|safe }}
+    </article>
+</div>
+{% endblock %}

templates/settings.html

@@ -218,11 +218,11 @@
                     <input name="fixed_amount" type="number" step="1" min="1" value="{{ fixed_amount }}">
                 </div>
                 <div class="field">
-                    <label>保证金占用上限（%）</label>
+                    <label>单仓保证金上限（%）</label>
                     <input name="max_margin_pct" type="number" step="1" min="1" max="100" value="{{ max_margin_pct }}">
                 </div>
                 <div class="field">
-                    <label>滚仓保证金占用上限（%）</label>
+                    <label>综合保证金上限（%）</label>
                     <input name="roll_max_margin_pct" type="number" step="1" min="1" max="100" value="{{ roll_max_margin_pct }}">
                 </div>
                 <div class="field">
@@ -236,8 +236,7 @@
             </div>
             <button type="submit" class="btn-primary" style="margin-top:.75rem">保存交易设置</button>
             <p class="hint" style="margin-top:.75rem;margin-bottom:0">
-                开仓保证金上限用于开仓校验与品种最大手数估算（默认 30%）。固定金额计仓时<strong>先按止损算手数，再按保证金上限收紧</strong>。
-                滚仓保证金上限为滚仓后<strong>总持仓</strong>占用上限（默认 50%，可在下方修改）。
+                单仓保证金上限（默认 30%）用于<strong>新开仓</strong>校验与最大手数估算；综合保证金上限（默认 50%）在单仓模式下为滚仓合计上限、多仓模式下为全部持仓合计上限。固定金额计仓时<strong>先按止损算手数，再按单仓上限收紧</strong>。
                 <strong>移动保本</strong>：达 1R 后止损移至开仓价 ± N 跳。
                 <strong>挂单超时</strong>：限价开仓未成交时，超过设定分钟数自动向柜台撤单（1~60 分钟）。
                 <span class="text-muted">{{ small_account_margin_rec.label }}。</span>