refactor(static): 重写首页,统一设计语言提升视觉和谐感

- index.html: 品牌树 SVG 扩展为 4 层节点,新增径向渐变光晕底衬;
  About 面板新增同心圆装饰 SVG;CTA 树水印重绘为紧凑 7 节点版本
- css/index.css: 统一渐变方向为 135deg;光晕/点阵透明度更克制;
  卡片 hover 阴影更柔和;树动画幅度降低周期放慢;间距节奏统一
- js/index.js: IntersectionObserver 选择器适配新 section 命名
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qing committed 2026-08-08 00:28:30 +00:00
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commit 546b19aece
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@@ -69,7 +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, .section-sub, .feature-card, .about .site-intro, .about-stats, .quick-links, .cta-band');
const targets = document.querySelectorAll('.section-eyebrow, .section-title, .section-sub, .feature-card, .site-intro, .about-stats, .quick-links, .cta-band');
targets.forEach(function (el, i) {
el.classList.add('reveal');
el.style.transitionDelay = (i % 4) * 70 + 'ms';