M2: 主题系统（sablog经典+modern简约）+ 前台全部页面 + 老 URL 301 兼容 + markdown 双份导入

themes/modern/assets/style.css

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+/* ============ Modern 简约主题 ============ */
+:root {
+    --bg: #fafafa;
+    --card: #fff;
+    --text: #1a1a1a;
+    --muted: #767676;
+    --accent: #e74c3c;
+    --border: #eaeaea;
+}
+@media (prefers-color-scheme: dark) {
+    :root {
+        --bg: #151515;
+        --card: #1e1e1e;
+        --text: #e8e8e8;
+        --muted: #9a9a9a;
+        --accent: #ff6b5e;
+        --border: #2c2c2c;
+    }
+}
+* { margin: 0; padding: 0; box-sizing: border-box; }
+body { background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.8; }
+a { color: var(--accent); text-decoration: none; }
+a:hover { opacity: 0.8; }
+.m-container { max-width: 720px; margin: 0 auto; padding: 0 20px; }
+
+.m-header { border-bottom: 1px solid var(--border); background: var(--card); }
+.m-header .m-container { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; }
+.m-logo { font-size: 22px; font-weight: 800; letter-spacing: 1px; color: var(--text); }
+.m-nav { display: flex; gap: 18px; font-size: 14px; align-items: center; }
+.m-nav a.active { font-weight: 700; }
+.m-link-btn { background: none; border: none; color: var(--accent); font-size: 14px; cursor: pointer; padding: 0; }
+.inline-form { display: inline; }
+
+.main-layout { padding: 36px 20px; }
+.main-layout .content { max-width: 720px; margin: 0 auto; }
+
+.post-card, .post-full, .comments-section { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 26px 30px; margin-bottom: 22px; }
+.post-card.sticky { box-shadow: inset 3px 0 0 var(--accent); }
+.post-title { font-size: 20px; margin-bottom: 8px; line-height: 1.45; }
+.post-card .post-title a { color: var(--text); }
+.badge { background: var(--accent); color: #fff; font-size: 11px; padding: 2px 7px; border-radius: 3px; margin-right: 6px; vertical-align: 2px; }
+.post-meta { color: var(--muted); font-size: 13px; margin-bottom: 12px; }
+.post-excerpt { color: var(--muted); }
+.post-footer { margin-top: 12px; display: flex; gap: 12px; flex-wrap: wrap; font-size: 14px; }
+.read-more { font-weight: 600; }
+
+.post-full .post-title { font-size: 28px; }
+.post-content { margin-top: 14px; }
+.post-content img { max-width: 100%; border-radius: 8px; }
+.post-content pre { background: #0d1117; color: #c9d1d9; padding: 16px; border-radius: 8px; overflow-x: auto; margin: 14px 0; }
+.post-content code { background: rgba(128,128,128,.15); padding: 2px 6px; border-radius: 4px; font-size: 14px; }
+.post-content pre code { background: none; padding: 0; }
+.post-content blockquote { border-left: 3px solid var(--accent); padding-left: 16px; color: var(--muted); margin: 14px 0; }
+.post-content h1, .post-content h2, .post-content h3 { margin: 20px 0 8px; }
+
+.post-cover { margin: -26px -30px 18px; border-radius: 12px 12px 0 0; overflow: hidden; }
+.post-cover img { width: 100%; display: block; max-height: 380px; object-fit: cover; }
+
+.tag-link { color: var(--accent); font-size: 14px; margin-right: 8px; }
+
+.comments-section { margin-top: 8px; }
+.section-title { font-size: 17px; margin-bottom: 14px; }
+.comment { padding: 12px 0; border-bottom: 1px solid var(--border); }
+.comment:last-of-type { border-bottom: none; }
+.comment-head { font-size: 14px; margin-bottom: 4px; }
+.comment-time { color: var(--muted); font-size: 13px; }
+.comment-body { color: var(--text); font-size: 15px; }
+.comment-form { margin-top: 14px; }
+.form-row { margin-bottom: 12px; }
+.form-row label { display: block; font-size: 14px; margin-bottom: 4px; color: var(--muted); }
+.form-row input, .form-row textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); font-size: 15px; font-family: inherit; }
+.honeypot { position: absolute; left: -9999px; opacity: 0; }
+.error { color: var(--accent); font-size: 13px; }
+.btn { background: var(--accent); color: #fff; border: none; padding: 10px 24px; border-radius: 8px; font-size: 15px; cursor: pointer; }
+.alert { padding: 12px 18px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
+.alert-success { background: rgba(46,160,67,.12); color: #2ea043; }
+.alert-error { background: rgba(248,81,73,.12); color: #f85149; }
+.empty { color: var(--muted); text-align: center; padding: 40px 0; }
+
+.list-title { font-size: 24px; margin-bottom: 20px; }
+
+.archive-year { font-size: 16px; margin: 16px 0 6px; }
+.archive-list { list-style: none; }
+.archive-posts { margin: 4px 0 12px 22px; }
+.archive-posts time { color: var(--muted); font-size: 13px; }
+
+.pagination { margin: 16px 0; }
+.pagination-links { display: flex; gap: 8px; flex-wrap: wrap; }
+.pagination-links a, .pagination-links .current, .pagination-links .disabled { padding: 6px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; background: var(--card); color: var(--text); }
+.pagination-links .current { background: var(--accent); color: #fff; border-color: var(--accent); }
+.pagination-links .disabled { color: var(--muted); }
+
+.m-footer { border-top: 1px solid var(--border); padding: 26px 0 40px; margin-top: 30px; text-align: center; color: var(--muted); font-size: 13px; }
+
+.tag-cloud.big { line-height: 2.4; }
+.links-list { list-style: none; }
+.links-list li { padding: 6px 0; }
+.link-note { color: var(--muted); font-size: 14px; }
+
+.auth-layout { display: flex; justify-content: center; padding: 50px 20px; }
+.auth-box { width: 100%; max-width: 420px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 30px; }
+.auth-alt { margin-top: 14px; font-size: 14px; color: var(--muted); text-align: center; }
+.search-form { margin-bottom: 16px; display: flex; gap: 8px; }
+.search-form input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); font-size: 15px; }

themes/modern/theme.json

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+{
+    "title": "Modern 简约",
+    "version": "1.0.0",
+    "description": "极简现代风格，支持深色模式",
+    "author": "LaraLog",
+    "screenshot": null
+}

themes/modern/views/partials/footer.blade.php

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+<footer class="m-footer">
+    <div class="m-container">
+        <p>&copy; {{ date('Y') }} {{ $siteName }}
+        @if($siteIcp)<a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener">{{ $siteIcp }}</a>@endif
+        </p>
+        <p>LaraLog · 用 Markdown 书写，用 AI 审核</p>
+    </div>
+</footer>

themes/modern/views/partials/head.blade.php

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+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <title>{{ $pageTitle ?? $siteName }}</title>
+    <meta name="description" content="{{ $pageDescription ?? $siteDescription }}">
+    @if(($pageKeywords ?? '') !== '')
+        <meta name="keywords" content="{{ $pageKeywords }}">
+    @endif
+    <meta name="generator" content="LaraLog">
+    <link rel="canonical" href="{{ url()->current() }}">
+    <link rel="alternate" type="application/rss+xml" title="{{ $siteName }}" href="{{ route('feed.rss') }}">
+    <link rel="stylesheet" href="{{ theme('asset', 'style.css') }}">
+    @stack('head')
+</head>

themes/modern/views/partials/header.blade.php

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+<header class="m-header">
+    <div class="m-container">
+        <a href="{{ route('home') }}" class="m-logo">{{ $siteName }}</a>
+        <nav class="m-nav">
+            <a href="{{ route('home') }}" class="{{ request()->routeIs('home') ? 'active' : '' }}">首页</a>
+            <a href="{{ route('archives') }}" class="{{ request()->routeIs('archives*') ? 'active' : '' }}">归档</a>
+            <a href="{{ route('tags') }}" class="{{ request()->routeIs('tags*') ? 'active' : '' }}">标签</a>
+            <a href="{{ route('links') }}" class="{{ request()->routeIs('links') ? 'active' : '' }}">友链</a>
+            @auth
+                <a href="{{ route('profile') }}">{{ auth()->user()->name }}</a>
+                <form action="{{ route('logout') }}" method="post" class="inline-form">
+                    @csrf
+                    <button type="submit" class="m-link-btn">退出</button>
+                </form>
+            @else
+                <a href="{{ route('login') }}">登录</a>
+            @endauth
+        </nav>
+    </div>
+</header>