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@@ -1,29 +1,35 @@
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/**
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* 页面顶部光晕背景(通用)
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* 源自 academy .academy-block-1::before,各页通过 CSS 变量调整高度与图片。
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* 页面背景(通用)
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*
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* 用法:
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* <main class="aifo-page-bg">
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* <div class="页面内容容器">...</div>
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* </main>
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* <main class="aifo-page-bg aifo-page-bg--top-glow">...</main>
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*
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* 注意:aifo-page-bg 应为全宽外层,勿与 max-width 内容容器写在同一元素上。
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* aifo-page-bg 只负责导航间距与定位;背景光晕三选一(勿混用):
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* aifo-page-bg--top-glow 顶部全宽光晕(默认 academy 图)
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* aifo-page-bg--top-left-glow 左上角光晕
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* aifo-page-bg--grid 网格底纹(无光晕图)
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*
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* 按页覆盖光晕高度:
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* 按页覆盖 — 顶部全宽:
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* #my-page { --aifo-page-bg-height: 920px; }
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*
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* 按页覆盖背景图:
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* #my-page { --aifo-page-bg-image: url(../images/...); }
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*
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* 按页覆盖 — 左上角:
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* #my-page { --aifo-page-bg-top-left-top: 97px; }
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* #my-page { --aifo-page-bg-top-left-image: url(../images/...); }
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*
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* 按页增加导航下方内容间距(不含 header 高度):
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* #my-page { --aifo-page-content-offset: 1.5rem; }
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*
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* 叠加网格底纹(可选):
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* <main class="aifo-page-bg aifo-page-bg--grid">...</main>
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*/
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:root {
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:root {
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/* 与 #academy-main margin-top、固定导航高度保持一致 */
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--aifo-nav-height: 5.9375rem;
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/* 左上角光晕(默认 top:0,配合 .aifo-page-bg 的 margin-top 对齐导航下方) */
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--aifo-page-bg-top-left-top: 0;
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--aifo-page-bg-top-left-left: -2vw;
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--aifo-page-bg-top-left-size: min(60vw, 555px);
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--aifo-page-bg-top-left-max-height: min(52vh, 485px);
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--aifo-page-bg-top-left-image: url("../images/backgrounds/new-user-promo-corner-glow.png");
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}
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@media (max-width: 768px) {
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@@ -42,7 +48,8 @@
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padding-top: var(--aifo-page-content-offset, 0);
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}
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.aifo-page-bg::before {
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/* 顶部全宽光晕 */
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.aifo-page-bg--top-glow::before {
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content: "";
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position: absolute;
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top: 0;
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@@ -56,12 +63,27 @@
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--aifo-page-bg-image,
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url("../images/backgrounds/academy/academy_bg_1.webp")
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);
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background-position: center;
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background-repeat: no-repeat;
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background-size: cover;
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}
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/* 左上角光晕 — 源自 special-offer-50;contain 完整显示 PNG,避免 cover 裁切硬边 */
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.aifo-page-bg--top-left-glow::before {
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content: "";
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position: absolute;
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top: var(--aifo-page-bg-top-left-top);
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left: var(--aifo-page-bg-top-left-left);
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width: var(--aifo-page-bg-top-left-size);
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height: var(--aifo-page-bg-top-left-size);
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max-height: var(--aifo-page-bg-top-left-max-height);
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pointer-events: none;
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z-index: 3;
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background: var(--aifo-page-bg-top-left-image) no-repeat left top;
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background-size: contain;
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}
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/* 网格底纹(无光晕图) */
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.aifo-page-bg--grid {
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background-image: image-set(
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url("../images/backgrounds/academy/bg_grid.webp") type("image/webp"),
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