feat(static): 首页新增 Bento 特性卡、CTA 横幅与品牌页脚

- 特性区改 Bento 网格（首尾卡跨两列）并加底部标签胶囊
- 关于区改左文右数据面板，移动端转竖排横数据
- 新增结尾品牌渐变 CTA 横幅（含深色模式适配）
- 页脚重构为品牌+导航+备案三段
- CTA 按钮改 data-cta 多按钮绑定，渐显目标同步补全

static/public/css/index.css

@@ -255,7 +255,8 @@ body {
 .scroll-hint:hover { color: var(--accent); }
 .scroll-hint svg { width: 22px; height: 22px; }
 
-/* ===== 章节标题：eyebrow + 标题 + 渐变短杠 ===== */
+/* ===== 章节标题：eyebrow + 标题 + 渐变短杠 + 副标题 ===== */
+#features { scroll-margin-top: 5.5rem; } /* 锚点跳转时避开悬浮头部 */
 .section-eyebrow {
     text-align: center;
     margin-top: 4.5rem;
@@ -282,20 +283,32 @@ body {
     background: linear-gradient(90deg, var(--accent), var(--accent-dark));
     opacity: 0.9;
 }
+.section-sub {
+    text-align: center;
+    margin-top: 0.9rem;
+    font-size: 0.95rem;
+    letter-spacing: 0.03em;
+    color: var(--fg-secondary);
+}
 
-/* ===== 特性卡片：序号水印 + 光标光斑 + 图标点亮 ===== */
+/* ===== 特性卡片：Bento 网格 + 序号水印 + 光标光斑 + 图标点亮 ===== */
 .features {
     display: grid;
-    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+    grid-template-columns: repeat(3, 1fr);
     gap: 1.1rem;
     width: 100%;
     max-width: 960px;
     margin: 2rem auto 0;
     counter-reset: feat;
 }
+/* Bento 节奏：首尾卡片横贯两列，形成 2+1 / 1+2 交错布局 */
+.feature-card:nth-child(1),
+.feature-card:nth-child(4) { grid-column: span 2; }
 .feature-card {
     counter-increment: feat;
     position: relative;
+    display: flex;
+    flex-direction: column;
     background: var(--card);
     /* 光标光斑：JS 写入 --mx/--my，缺省停在顶部中央 */
     background-image: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), var(--accent-soft), transparent 75%);
@@ -359,31 +372,60 @@ body {
 }
 .feature-card h3 { margin-bottom: 0.4rem; font-size: 1.05rem; letter-spacing: 0.01em; }
 .feature-card p {
+    flex: 1; /* 撑开文本区，让底部标签在同行卡片间对齐 */
     font-size: 0.88rem;
     line-height: 1.75;
     color: var(--fg-secondary);
 }
+/* 底部标签胶囊 */
+.feature-tag {
+    align-self: flex-start;
+    margin-top: 1.1rem;
+    padding: 0.22rem 0.7rem;
+    font-size: 0.72rem;
+    font-weight: 600;
+    letter-spacing: 0.08em;
+    color: var(--accent-dark);
+    background: var(--accent-soft);
+    border: 1px solid var(--accent-glow);
+    border-radius: 999px;
+    transition: color 0.25s, border-color 0.25s;
+}
+.feature-card:hover .feature-tag {
+    color: var(--accent);
+    border-color: var(--accent);
+}
 
-/* ===== 关于本站 ===== */
+/* ===== 关于本站：左文右数的编辑感面板 ===== */
 .about {
     text-align: center;
     padding: 1rem 1rem 3.5rem;
-    max-width: 780px;
+    width: 100%;
+    max-width: 960px;
     margin: 0 auto;
 }
 .about .section-eyebrow, .about .section-title { margin-top: 0; }
-.about .site-intro {
+.about-panel {
     position: relative;
+    display: flex;
+    align-items: center;
+    gap: 2.4rem;
+    text-align: left;
     background: var(--card);
     border: 1px solid var(--border-light);
     border-radius: var(--radius-lg);
     box-shadow: var(--shadow-sm);
-    padding: 2rem 2.2rem;
+    padding: 2.4rem 2.6rem;
     margin-top: 2rem;
     overflow: hidden;
+    transition: border-color 0.25s, box-shadow 0.25s;
+}
+.about-panel:hover {
+    border-color: var(--border);
+    box-shadow: var(--shadow-md);
 }
 /* 左侧品牌渐变条 + 右上角装饰引号 */
-.about .site-intro::before {
+.about-panel::before {
     content: "";
     position: absolute;
     left: 0;
@@ -393,7 +435,7 @@ body {
     background: linear-gradient(180deg, var(--accent), var(--accent-dark));
     opacity: 0.85;
 }
-.about .site-intro::after {
+.about-panel::after {
     content: "”";
     position: absolute;
     top: -0.6rem;
@@ -404,11 +446,43 @@ body {
     color: var(--accent-soft);
     pointer-events: none;
 }
+.about .site-intro { flex: 1; min-width: 0; }
 .site-intro {
     font-size: 0.96rem;
     line-height: 1.95;
     color: var(--fg-secondary);
 }
+/* 右侧数据列：竖向分隔线 + 渐变数字 */
+.about-stats {
+    list-style: none;
+    flex: none;
+    display: flex;
+    flex-direction: column;
+    gap: 1.15rem;
+    padding-left: 2.4rem;
+    border-left: 1px solid var(--border-light);
+}
+.about-stats li {
+    display: flex;
+    flex-direction: column;
+    gap: 0.15rem;
+}
+.about-stats b {
+    font-size: 1.45rem;
+    font-weight: 800;
+    line-height: 1.1;
+    letter-spacing: 0.02em;
+    background: linear-gradient(120deg, var(--accent), var(--accent-dark));
+    -webkit-background-clip: text;
+    background-clip: text;
+    color: transparent;
+}
+.about-stats span {
+    font-size: 0.78rem;
+    letter-spacing: 0.02em;
+    color: var(--muted);
+    white-space: nowrap;
+}
 /* 快捷链接：胶囊按钮 */
 .quick-links {
     display: flex;
@@ -445,6 +519,135 @@ body {
 }
 .quick-links a:hover::after { transform: translateX(3px); }
 
+/* ===== 结尾行动号召：品牌渐变横幅 ===== */
+.cta-section {
+    width: 100%;
+    max-width: 960px;
+    margin: 0.5rem auto 0;
+    padding: 0 1rem;
+}
+.cta-band {
+    position: relative;
+    overflow: hidden;
+    text-align: center;
+    padding: 3.4rem 1.5rem 3.6rem;
+    border-radius: var(--radius-lg);
+    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
+    color: #fff;
+    box-shadow: 0 14px 34px rgba(232, 133, 58, 0.28);
+}
+/* 底部点阵纹理 + 顶部高光线，提升质感 */
+.cta-band::before {
+    content: "";
+    position: absolute;
+    inset: 0;
+    background-image: radial-gradient(rgba(255, 255, 255, 0.22) 1px, transparent 1px);
+    background-size: 22px 22px;
+    -webkit-mask-image: radial-gradient(ellipse 75% 80% at 50% 110%, #000 20%, transparent 72%);
+    mask-image: radial-gradient(ellipse 75% 80% at 50% 110%, #000 20%, transparent 72%);
+    pointer-events: none;
+}
+.cta-band::after {
+    content: "";
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: 0;
+    height: 1px;
+    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
+}
+/* 品牌节点树水印 */
+.cta-tree {
+    position: absolute;
+    right: -28px;
+    bottom: -18px;
+    width: min(380px, 62%);
+    height: auto;
+    color: #fff;
+    opacity: 0.14;
+    transform: rotate(-6deg);
+    pointer-events: none;
+}
+.cta-title {
+    position: relative;
+    font-size: clamp(1.45rem, 3.6vw, 1.9rem);
+    font-weight: 800;
+    letter-spacing: 0.03em;
+}
+.cta-sub {
+    position: relative;
+    margin-top: 0.65rem;
+    font-size: 0.95rem;
+    letter-spacing: 0.04em;
+    opacity: 0.92;
+}
+.btn-cta {
+    position: relative;
+    margin-top: 1.7rem;
+    background: #fff;
+    color: var(--accent-dark);
+    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.14);
+}
+.btn-cta:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
+}
+/* 深色模式：渐变底色变浅，文字与按钮反转为深棕 */
+@media (prefers-color-scheme: dark) {
+    .cta-band {
+        color: #38220f;
+        box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
+    }
+    .cta-band::before {
+        background-image: radial-gradient(rgba(56, 34, 15, 0.16) 1px, transparent 1px);
+    }
+    .cta-band::after {
+        background: linear-gradient(90deg, transparent, rgba(56, 34, 15, 0.35), transparent);
+    }
+    .cta-tree { color: #38220f; opacity: 0.16; }
+    .btn-cta { background: #38220f; color: #f7ead9; }
+}
+
+/* ===== 页脚：品牌 + 导航 + 备案 ===== */
+.footer {
+    width: 100%;
+    max-width: 960px;
+    padding: 0 1rem;
+}
+.footer-inner {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 0.85rem;
+    margin-top: 3rem;
+    padding: 1.8rem 0 0.4rem;
+    border-top: 1px solid var(--border-light);
+}
+.footer-brand {
+    display: flex;
+    align-items: center;
+    gap: 0.45rem;
+    font-size: 0.95rem;
+    font-weight: 700;
+    letter-spacing: 0.02em;
+    color: var(--fg);
+}
+.footer-brand svg { color: var(--accent); }
+.footer-nav {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 0.35rem 1.5rem;
+}
+.footer-nav a {
+    font-size: 0.84rem;
+    color: var(--fg-secondary);
+    text-decoration: none;
+    transition: color 0.15s;
+}
+.footer-nav a:hover { color: var(--accent); }
+.footer-icp { margin-top: 0.15rem; }
+
 /* ===== 入场动画（首屏元素，页面加载即播） ===== */
 @keyframes fade-up {
     from { opacity: 0; transform: translateY(14px); }
@@ -524,8 +727,9 @@ body {
     .hero::after { width: 440px; height: 440px; opacity: 0.45; }
     .hero-tree { width: 130%; opacity: 0.12; }
     .hero-title { letter-spacing: 0.02em; }
-    .features { gap: 0.9rem; }
+    .features { grid-template-columns: repeat(2, 1fr); gap: 0.9rem; }
     .feature-card { padding: 1.5rem 1.25rem; }
+    .about-panel { gap: 1.6rem; padding: 2rem 1.8rem; }
 }
 
 /* 手机：全宽布局、紧凑排版 */
@@ -559,12 +763,36 @@ body {
     .section-eyebrow { margin-top: 2.75rem; }
     .section-title { font-size: 1.3rem; }
     .features { margin-top: 1.25rem; grid-template-columns: 1fr; }
+    /* 单列布局下取消 Bento 跨列，避免撑出隐式第二列 */
+    .feature-card:nth-child(1),
+    .feature-card:nth-child(4) { grid-column: auto; }
     .feature-card:hover { transform: none; } /* 触屏取消悬浮位移 */
 
     .about { padding: 0.5rem 0.5rem 2.5rem; }
-    .about .site-intro { padding: 1.5rem 1.4rem; text-align: left; }
-    .about .site-intro::after { font-size: 3.5rem; right: 0.8rem; }
+    .about-panel {
+        flex-direction: column;
+        align-items: stretch;
+        gap: 1.4rem;
+        padding: 1.5rem 1.4rem;
+    }
+    .about-panel::after { font-size: 3.5rem; right: 0.8rem; }
+    /* 数据列转为横向排列，分隔线移到顶部 */
+    .about-stats {
+        flex-direction: row;
+        justify-content: space-between;
+        gap: 0.8rem;
+        padding-left: 0;
+        padding-top: 1.3rem;
+        border-left: none;
+        border-top: 1px solid var(--border-light);
+    }
+    .about-stats span { white-space: normal; }
     .quick-links { gap: 0.6rem 0.8rem; margin-top: 1.5rem; }
+
+    .cta-section { padding: 0 0.25rem; }
+    .cta-band { padding: 2.6rem 1.2rem 2.8rem; }
+    .cta-tree { width: 78%; opacity: 0.1; }
+    .footer-inner { margin-top: 2.2rem; }
 }
 
 /* 超小屏 */

static/public/index.html

@@ -57,7 +57,7 @@
                 <h2 class="hero-title">让知识像树一样<br><span class="accent-text">自然生长</span></h2>
                 <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>
                 <div class="hero-actions">
-                    <button id="ctaBtn" class="btn btn-primary btn-lg">开始记录</button>
+                    <button class="btn btn-primary btn-lg" data-cta>开始记录</button>
                     <a class="btn btn-ghost btn-lg" href="#features">了解更多</a>
                 </div>
             </div>
@@ -70,13 +70,15 @@
         <section id="features">
             <p class="section-eyebrow">核心特性</p>
             <h2 class="section-title">为什么选择树状笔记</h2>
+            <p class="section-sub">从灵感到体系，四个理由让知识在树上自然生长</p>
             <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>
+                    <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，长成一棵属于你的知识树。</p>
+                    <span class="feature-tag">无限层级</span>
                 </div>
                 <div class="feature-card">
                     <div class="feature-icon" aria-hidden="true">
@@ -84,6 +86,7 @@
                     </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>
+                    <span class="feature-tag">专注写作</span>
                 </div>
                 <div class="feature-card">
                     <div class="feature-icon" aria-hidden="true">
@@ -91,13 +94,15 @@
                     </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>
+                    <span class="feature-tag">自由分享</span>
                 </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>
+                    <p>跟随系统偏好自动切换明暗主题，深夜记录也不刺眼，日夜皆宜的舒适阅读体验。</p>
+                    <span class="feature-tag">日夜皆宜</span>
                 </div>
             </div>
         </section>
@@ -105,21 +110,72 @@
         <section class="about">
             <p class="section-eyebrow">我们的理念</p>
             <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="about-panel">
+                <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>
+                <ul class="about-stats">
+                    <li><b>∞</b><span>节点层级无上限</span></li>
+                    <li><b>MD</b><span>原生 Markdown 渲染</span></li>
+                    <li><b>4+</b><span>内容形态一站承载</span></li>
+                </ul>
+            </div>
             <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>
+
+        <section class="cta-section" aria-label="立即开始">
+            <div class="cta-band">
+                <!-- 品牌装饰：节点树水印（纯装饰） -->
+                <svg class="cta-tree" viewBox="0 0 640 360" fill="none" aria-hidden="true">
+                    <g stroke="currentColor" stroke-width="2" stroke-linecap="round">
+                        <path d="M320 344 L320 262"/>
+                        <path d="M320 262 C 282 236, 238 214, 202 184"/>
+                        <path d="M320 262 C 358 236, 402 214, 438 184"/>
+                        <path d="M202 184 C 178 156, 156 134, 142 104"/>
+                        <path d="M202 184 C 222 156, 244 134, 258 104"/>
+                        <path d="M438 184 C 414 156, 396 134, 382 104"/>
+                        <path d="M438 184 C 462 156, 484 134, 498 104"/>
+                    </g>
+                    <g fill="currentColor">
+                        <circle cx="320" cy="344" r="6"/>
+                        <circle cx="320" cy="262" r="4.5"/>
+                        <circle cx="202" cy="184" r="4.5"/>
+                        <circle cx="438" cy="184" r="4.5"/>
+                        <circle cx="142" cy="104" r="4"/>
+                        <circle cx="258" cy="104" r="4"/>
+                        <circle cx="382" cy="104" r="4"/>
+                        <circle cx="498" cy="104" r="4"/>
+                    </g>
+                </svg>
+                <h2 class="cta-title">准备好让知识生长了吗？</h2>
+                <p class="cta-sub">注册一个账号，种下你的第一棵知识树</p>
+                <button class="btn btn-cta btn-lg" data-cta>立即开始</button>
+            </div>
+        </section>
     </main>
 
     <footer class="footer">
-        <a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener">蜀ICP备2024107064号-2</a>
+        <div class="footer-inner">
+            <div class="footer-brand">
+                <svg viewBox="0 0 24 24" width="15" height="15" 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>
+                <span>DNFS 树状笔记</span>
+            </div>
+            <nav class="footer-nav" aria-label="页脚导航">
+                <a href="dnfs.html">树状笔记</a>
+                <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>
+            </nav>
+            <p class="footer-icp">
+                <a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener">蜀ICP备2024107064号-2</a>
+            </p>
+        </div>
     </footer>
     <script src="js/token_manager.js"></script>
     <script src="js/index.js"></script>

static/public/js/index.js

@@ -13,7 +13,7 @@
 	const logoutBtn = document.getElementById('logoutBtn');
 	const loginBtn = document.getElementById('loginBtn');
 	const registerBtn = document.getElementById('registerBtn');
-	const ctaBtn = document.getElementById('ctaBtn');
+	const ctaBtns = document.querySelectorAll('[data-cta]'); // 首屏与页尾 CTA 按钮
 	const logoEl = document.getElementById('logo');
 
 	let loggedIn = false;
@@ -24,7 +24,9 @@
 	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'));
+	ctaBtns.forEach(function (btn) {
+		btn.addEventListener('click', () => go(loggedIn ? 'dnfs.html' : 'login.html'));
+	});
 
 	async function checkLogin() {
 		try {
@@ -40,7 +42,7 @@
 				logoutBtn.style.display = '';
 				loginBtn.style.display = 'none';
 				registerBtn.style.display = 'none';
-				ctaBtn.textContent = '进入我的知识树';
+				ctaBtns.forEach(function (btn) { btn.textContent = '进入我的知识树'; });
 			}
 		} catch (e) {
 			console.warn('index: 登录态检测失败', e.message);
@@ -67,7 +69,7 @@
 
 	/* 滚动进入视口渐显：由 JS 添加 .reveal 隐藏初始态，无 JS / 减弱动效时内容天然可见 */
 	if (!reduceMotion && 'IntersectionObserver' in window) {
-		const targets = document.querySelectorAll('.section-eyebrow, .section-title, .feature-card, .about .site-intro, .quick-links');
+		const targets = document.querySelectorAll('.section-eyebrow, .section-title, .section-sub, .feature-card, .about .site-intro, .about-stats, .quick-links, .cta-band');
 		targets.forEach(function (el, i) {
 			el.classList.add('reveal');
 			el.style.transitionDelay = (i % 4) * 70 + 'ms';