feat(static): 优化社区首页 — Hero首屏+特性卡片+悬浮毛玻璃导航，CTA随登录态切换

static/public/css/index.css

@@ -4,31 +4,177 @@ body {
     align-items: normal;
 }
 
-/* ===== 头部 ===== */
+@media (prefers-reduced-motion: no-preference) {
+    html { scroll-behavior: smooth; }
+}
+
+/* ===== 按钮 ===== */
+.btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 0.55rem 1.3rem;
+    font-size: 0.88rem;
+    font-weight: 600;
+    font-family: inherit;
+    border: 1px solid transparent;
+    border-radius: var(--radius-sm);
+    cursor: pointer;
+    text-decoration: none;
+    line-height: 1.4;
+    transition: opacity 0.15s, transform 0.1s, background 0.15s, border-color 0.15s;
+}
+.btn:active { transform: scale(0.96); }
+.btn-primary { background: var(--accent); color: #fff; }
+.btn-primary:hover { background: var(--accent-dark); opacity: 1; }
+.btn-ghost { background: var(--accent-soft); color: var(--accent-dark); }
+.btn-ghost:hover { border-color: var(--accent); opacity: 1; }
+.btn-lg { padding: 0.7rem 1.9rem; font-size: 1rem; border-radius: var(--radius-md); }
+
+/* ===== 头部：悬浮毛玻璃导航（镜像 minimap/userpanel 风格） ===== */
 .header {
+    position: sticky;
+    top: 0.75rem;
+    z-index: 100;
     display: flex;
     justify-content: space-between;
     align-items: center;
+    flex-wrap: wrap;
+    gap: 0.5rem;
     width: 100%;
+    max-width: 960px;
+    margin: 0 auto;
+    padding: 0.5rem 1rem;
+    border-radius: var(--radius-md);
+    background: rgba(253, 246, 238, 0.72);
+    border: 1px solid var(--border-light);
+    backdrop-filter: blur(12px);
+    -webkit-backdrop-filter: blur(12px);
+    box-shadow: var(--shadow-md);
+    transition: background 0.2s, border-color 0.2s;
 }
+@media (prefers-color-scheme: dark) {
+    .header {
+        background: rgba(30, 23, 18, 0.72);
+        border-color: var(--border);
+    }
+}
+
+.header h1 {
+    font-size: 1.15rem;
+    cursor: pointer;
+    user-select: none;
+    transition: color 0.15s;
+}
+.header h1:hover { color: var(--accent); }
 
 .right-group {
     display: flex;
     align-items: center;
-}
+    flex-wrap: wrap;
-
+    gap: 0.4rem;
-.right-group > img,
-.right-group > b,
-.right-group > button {
-    margin-left: 5px;
-    margin-right: 5px;
 }
 
 #avatar {
+    width: 36px;
+    height: 36px;
     border-radius: 50%;
+    border: 1.5px solid var(--border);
+    object-fit: cover;
 }
 
-/* ===== 网站简介 ===== */
+#name {
+    font-size: 0.88rem;
+    max-width: 120px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+/* ===== Hero 首屏 ===== */
+.hero {
+    position: relative;
+    text-align: center;
+    padding: 4rem 1rem 3rem;
+}
+.hero::before {
+    content: "";
+    position: absolute;
+    inset: 0;
+    background: radial-gradient(ellipse 60% 50% at 50% 30%, var(--accent-glow), transparent 70%);
+    pointer-events: none;
+}
+.hero > * { position: relative; }
+.hero-title {
+    font-size: clamp(1.8rem, 5vw, 2.6rem);
+    font-weight: 800;
+    line-height: 1.35;
+    letter-spacing: 0.02em;
+    margin-bottom: 0.75rem;
+}
+.accent-text { color: var(--accent); }
+.hero-sub {
+    font-size: 1.05rem;
+    color: var(--fg-secondary);
+}
+.hero-actions {
+    display: flex;
+    justify-content: center;
+    flex-wrap: wrap;
+    gap: 0.75rem;
+    margin-top: 1.75rem;
+}
+
+/* ===== 特性卡片 ===== */
+.section-title {
+    text-align: center;
+    margin-top: 3rem;
+}
+.features {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
+    gap: 0.9rem;
+    width: 100%;
+    max-width: 960px;
+    margin: 0 auto;
+}
+.feature-card {
+    background: var(--card);
+    border: 1px solid var(--border-light);
+    border-radius: var(--radius-md);
+    padding: 1.4rem 1.25rem;
+    box-shadow: var(--shadow-sm);
+    transition: transform 0.18s, box-shadow 0.2s, border-color 0.2s;
+}
+.feature-card:hover {
+    transform: translateY(-3px);
+    border-color: var(--border);
+    box-shadow: var(--shadow-md);
+}
+.feature-icon {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 38px;
+    height: 38px;
+    margin-bottom: 0.75rem;
+    border-radius: var(--radius-sm);
+    background: var(--accent-soft);
+    color: var(--accent-dark);
+}
+.feature-icon svg { width: 20px; height: 20px; }
+.feature-card h3 { margin-bottom: 0.35rem; }
+.feature-card p {
+    font-size: 0.86rem;
+    line-height: 1.65;
+    color: var(--fg-secondary);
+}
+
+/* ===== 关于本站 ===== */
+.about {
+    text-align: center;
+    padding-bottom: 2rem;
+}
 .site-intro {
     max-width: 640px;
     margin: 0 auto;
@@ -36,3 +182,42 @@ body {
     line-height: 1.9;
     color: var(--fg-secondary);
 }
+.quick-links {
+    display: flex;
+    justify-content: center;
+    flex-wrap: wrap;
+    gap: 1.25rem;
+    margin-top: 1.5rem;
+}
+.quick-links a {
+    font-size: 0.85rem;
+    color: var(--muted);
+    text-decoration: none;
+    transition: color 0.15s;
+}
+.quick-links a:hover { color: var(--accent); }
+
+/* ===== 入场动画 ===== */
+@keyframes fade-up {
+    from { opacity: 0; transform: translateY(12px); }
+    to { opacity: 1; transform: none; }
+}
+@media (prefers-reduced-motion: no-preference) {
+    .hero > *, .feature-card, .about { animation: fade-up 0.5s ease both; }
+    .hero-sub { animation-delay: 0.08s; }
+    .hero-actions { animation-delay: 0.16s; }
+    .feature-card:nth-child(2) { animation-delay: 0.06s; }
+    .feature-card:nth-child(3) { animation-delay: 0.12s; }
+    .feature-card:nth-child(4) { animation-delay: 0.18s; }
+}
+
+/* ===== 响应式 ===== */
+@media (max-width: 480px) {
+    .header { top: 0.5rem; padding: 0.45rem 0.75rem; }
+    .header h1 { font-size: 1rem; }
+    #name { max-width: 72px; }
+    .hero { padding: 2.5rem 0.5rem 2rem; }
+    .hero-sub { font-size: 0.95rem; }
+    .hero-actions { flex-direction: column; align-items: stretch; }
+    .section-title { margin-top: 2rem; }
+}

static/public/index.html

@@ -1,35 +1,91 @@
 <!DOCTYPE html>
 <html lang="zh-CN">
 <head>
-    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
+    <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="DNFS 树状笔记：以树状结构组织知识的笔记社区，支持 Markdown、链接卡片、图片与文件分享。">
+    <meta name="theme-color" media="(prefers-color-scheme: light)" content="#fdf6ee">
+    <meta name="theme-color" media="(prefers-color-scheme: dark)" content="#1e1712">
+    <link rel="icon" href="favicon.ico">
     <link rel="stylesheet" href="css/theme.css">
     <link rel="stylesheet" href="css/index.css">
-    <title>DNFS 欢迎来到树状笔记</title>
+    <title>DNFS 树状笔记 — 让知识自然成体系</title>
 </head>
 <body>
     <header class="header">
-        <h1 onclick="window.location.href='index.html'">DNFS 树状笔记</h1>
+        <h1 id="logo">DNFS 树状笔记</h1>
-        <div class="right-group">
+        <nav class="right-group" aria-label="用户操作">
-            <img src="favicon.ico" alt="头像加载失败" id="avatar" width="70px" height="70px">
+            <img src="favicon.ico" alt="用户头像" id="avatar" style="display:none">
-            <b id="name">DNFS</b>
+            <b id="name" style="display:none"></b>
-            <button id="enterBtn" onclick="window.location.href='dnfs.html'" style="display:none">进入笔记</button>
+            <button id="enterBtn" class="btn btn-primary" style="display:none">进入笔记</button>
-            <button id="logoutBtn" style="display:none">退出</button>
+            <button id="logoutBtn" class="btn btn-ghost" style="display:none">退出</button>
-            <button id="loginBtn" onclick="window.location.href='login.html'">登录</button>
+            <button id="loginBtn" class="btn btn-primary">登录</button>
-            <button id="registerBtn" onclick="window.location.href='register.html'">注册</button>
+            <button id="registerBtn" class="btn btn-ghost">注册</button>
-        </div>
+        </nav>
     </header>
-    <div id="main-page">
+
-        <h2>关于本站</h2>
+    <main id="main-page">
-        <p class="site-intro">
+        <section class="hero">
-            DNFS 树状笔记是一个以树状结构组织内容的笔记社区：每个节点都可以生长出子节点，
+            <h2 class="hero-title">让知识像树一样<br><span class="accent-text">自然生长</span></h2>
-            像树枝一样层层延展，让知识自然成体系。支持 Markdown 文本、链接卡片、图片与文件分享，
+            <p class="hero-sub">每个节点都可以生长出子节点，像树枝一样层层延展</p>
-            注册登录后即可创建属于你自己的知识树。
+            <div class="hero-actions">
-        </p>
+                <button id="ctaBtn" class="btn btn-primary btn-lg">开始记录</button>
-    </div>
+                <a class="btn btn-ghost btn-lg" href="#features">了解更多</a>
+            </div>
+        </section>
+
+        <section id="features">
+            <h2 class="section-title">为什么选择树状笔记</h2>
+            <div class="features">
+                <div class="feature-card">
+                    <div class="feature-icon" aria-hidden="true">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="18" cy="5" r="3"/><circle cx="6" cy="12" r="3"/><circle cx="18" cy="19" r="3"/><line x1="8.59" y1="10.51" x2="15.42" y2="6.51"/><line x1="8.59" y1="13.49" x2="15.42" y2="17.49"/></svg>
+                    </div>
+                    <h3>树状结构组织</h3>
+                    <p>每个节点都能生长出子节点，像树枝般层层延展，让零散的想法自然汇聚成体系。</p>
+                </div>
+                <div class="feature-card">
+                    <div class="feature-icon" aria-hidden="true">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 20h9"/><path d="M16.5 3.5a2.121 2.121 0 0 1 3 3L7 19l-4 1 1-4L16.5 3.5z"/></svg>
+                    </div>
+                    <h3>Markdown 写作</h3>
+                    <p>原生支持 Markdown 渲染，代码块、引用、列表一应俱全，专注内容本身。</p>
+                </div>
+                <div class="feature-card">
+                    <div class="feature-icon" aria-hidden="true">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>
+                    </div>
+                    <h3>多媒体分享</h3>
+                    <p>链接卡片、图片直显、文件下载，多种内容形态一站承载，分享更自由。</p>
+                </div>
+                <div class="feature-card">
+                    <div class="feature-icon" aria-hidden="true">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
+                    </div>
+                    <h3>深色模式</h3>
+                    <p>跟随系统偏好自动切换明暗主题，日夜皆宜的舒适阅读体验。</p>
+                </div>
+            </div>
+        </section>
+
+        <section class="about">
+            <h2 class="section-title">关于本站</h2>
+            <p class="site-intro">
+                DNFS 树状笔记是一个以树状结构组织内容的笔记社区：每个节点都可以生长出子节点，
+                像树枝一样层层延展，让知识自然成体系。支持 Markdown 文本、链接卡片、图片与文件分享，
+                注册登录后即可创建属于你自己的知识树。
+            </p>
+            <div class="quick-links">
+                <a href="allcolor.html">调色板</a>
+                <a href="games/">小游戏</a>
+                <a href="LICENSE.html">用户使用条例</a>
+            </div>
+        </section>
+    </main>
+
     <footer class="footer">
-		<a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener">蜀ICP备2024107064号-2</a>
+        <a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener">蜀ICP备2024107064号-2</a>
-	</footer>
+    </footer>
-	<script src="js/index.js"></script>
+    <script src="js/index.js"></script>
 </body>
 </html>

static/public/js/index.js

@@ -1,16 +1,30 @@
 /* index.js — 社区首页逻辑
  *
  * 登录态检测：POST /whoami（HttpOnly q4_token Cookie 自动携带，JS 不经手 Token）
- * 已登录：显示用户名与"进入笔记/退出"按钮；未登录：显示"登录/注册"
+ * 已登录：显示头像/用户名与"进入笔记/退出"按钮，首屏 CTA 指向笔记页
+ * 未登录：显示"登录/注册"，首屏 CTA 指向登录页
  */
 (function () {
 	'use strict';
 
 	const nameEl = document.getElementById('name');
+	const avatarEl = document.getElementById('avatar');
 	const enterBtn = document.getElementById('enterBtn');
 	const logoutBtn = document.getElementById('logoutBtn');
 	const loginBtn = document.getElementById('loginBtn');
 	const registerBtn = document.getElementById('registerBtn');
+	const ctaBtn = document.getElementById('ctaBtn');
+	const logoEl = document.getElementById('logo');
+
+	let loggedIn = false;
+
+	function go(url) { window.location.href = url; }
+
+	logoEl.addEventListener('click', () => go('index.html'));
+	enterBtn.addEventListener('click', () => go('dnfs.html'));
+	loginBtn.addEventListener('click', () => go('login.html'));
+	registerBtn.addEventListener('click', () => go('register.html'));
+	ctaBtn.addEventListener('click', () => go(loggedIn ? 'dnfs.html' : 'login.html'));
 
 	async function checkLogin() {
 		try {
@@ -18,11 +32,15 @@
 			if (!res.ok) return;
 			const data = await res.json();
 			if (data && data.login && data.user) {
+				loggedIn = true;
 				nameEl.textContent = String(data.user);
+				nameEl.style.display = '';
+				avatarEl.style.display = '';
 				enterBtn.style.display = '';
 				logoutBtn.style.display = '';
 				loginBtn.style.display = 'none';
 				registerBtn.style.display = 'none';
+				ctaBtn.textContent = '进入我的知识树';
 			}
 		} catch (e) {
 			console.warn('index: 登录态检测失败', e.message);