/* ==========================================================================
   加分笔记 · lqm-apple
   Apple Newsroom 风：超大图 / 极简排版 / 大量留白 / 无卡片无阴影
   ========================================================================== */

:root {
    --bg: #FFFFFF;
    --bg-alt: #F5F5F7;
    --dark: #1D1D1F;
    --text: #1D1D1F;
    --text-2: #424245;
    --muted: #6E6E73;
    --line: #D2D2D7;
    --line-soft: #E8E8ED;
    --link: #0066CC;
    --link-hover: #004499;

    --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
        "PingFang SC", "Helvetica Neue", "Microsoft YaHei", Helvetica, Arial, sans-serif;
    --mono: "SF Mono", "Cascadia Mono", Consolas, Menlo, monospace;

    --wrap: 1180px;
    --narrow: 720px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 17px;
    line-height: 1.6;
    letter-spacing: -.012em;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

.ap-wrap {
    width: 100%;
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 22px;
}

/* ---------- 顶栏（照 apple.com：深色细条 44px + 小字导航 + 右侧图标）---------- */
.ap-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(22, 22, 23, .80);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    color: #F5F5F7;
    transition: background .3s ease;
}
.ap-header.is-stuck { background: rgba(22, 22, 23, .94); }
.ap-header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 44px;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
}
.ap-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -.02em;
    color: #F5F5F7;
    white-space: nowrap;
}
.ap-brand:hover { color: #fff; }
.ap-mark { display: block; flex: none; }
.ap-wordmark { line-height: 1; }
.ap-nav { margin: 0 auto; display: flex; align-items: center; }
.ap-nav ul.nav {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}
.ap-nav ul.nav li a {
    display: block;
    padding: 0 11px;
    line-height: 44px;
    font-size: 12px;
    letter-spacing: -.01em;
    color: rgba(245, 245, 247, .80);
    transition: color .2s ease;
}
.ap-nav ul.nav li a:hover { color: #fff; }
.ap-nav ul.nav li.nav-current > a { color: #fff; }

.ap-actions { display: flex; align-items: center; gap: 4px; }
.ap-icon {
    display: grid;
    place-items: center;
    width: 30px;
    height: 44px;
    color: rgba(245, 245, 247, .80);
    transition: color .2s ease;
}
.ap-icon:hover { color: #fff; }
.ap-icon svg { display: block; }

.ap-nav-toggle {
    display: none;
    width: 34px;
    height: 44px;
    border: 0;
    background: transparent;
    color: #F5F5F7;
    cursor: pointer;
    place-items: center;
}

/* ---------- 首屏：超大图轮播 + 重点文章 ---------- */
.ap-hero { padding-top: 0; position: relative; }
.ap-slides {
    position: relative;
    aspect-ratio: 3.5 / 1;   /* 原 16/7.6 ≈ 684px 高 → 现在 ≈ 410px（矮 40%） */
    background: var(--bg-alt);
    overflow: hidden;
}
.ap-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity .7s ease;
    pointer-events: none;
}
.ap-slide.is-active { opacity: 1; pointer-events: auto; }
.ap-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 45%;
    transition: opacity .4s ease;
}
.ap-slide:hover img { opacity: .94; }
.ap-hero-body { padding-top: 40px; padding-bottom: 18px; position: relative; }
.ap-hero-text { display: none; }
.ap-hero-text.is-active { display: block; animation: apFadeUp .5s ease both; }
@keyframes apFadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
}
/* 轮播指示点：压在图片右下角 */
.ap-dots {
    position: absolute;
    right: 22px;
    bottom: 18px;
    z-index: 3;
    display: flex;
    gap: 9px;
}
.ap-dots[hidden] { display: none; }
.ap-dot {
    width: 8px;
    height: 8px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, .45);
    box-shadow: 0 1px 4px rgba(0, 0, 0, .35);
    cursor: pointer;
    transition: all .3s ease;
}
.ap-dot:hover { background: rgba(255, 255, 255, .75); }
.ap-dot.is-active { width: 22px; background: #fff; }
.ap-eyebrow {
    margin: 0 0 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .02em;
    color: var(--muted);
}
.ap-eyebrow a:hover { color: var(--link); }
.ap-hero-title {
    margin: 0;
    font-size: 52px;
    line-height: 1.08;
    font-weight: 700;
    letter-spacing: -.028em;
    max-width: 900px;
}
.ap-hero-title a:hover { color: var(--link); }
.ap-hero-excerpt {
    margin: 18px 0 0;
    max-width: 680px;
    font-size: 21px;
    line-height: 1.45;
    color: var(--muted);
    letter-spacing: -.018em;
}
.ap-hero-meta,
.ap-item-meta {
    margin: 16px 0 0;
    font-size: 13px;
    color: var(--muted);
}
.ap-sep { padding: 0 7px; opacity: .6; }
.ap-more {
    display: inline-block;
    margin-top: 18px;
    font-size: 17px;
    color: var(--link);
    letter-spacing: -.01em;
}
.ap-more:hover { color: var(--link-hover); text-decoration: underline; }
.ap-more.is-disabled { color: var(--muted); cursor: default; text-decoration: none; }

/* ---------- 区块 ---------- */
.ap-section { padding-top: 74px; }
.ap-section-first { padding-top: 44px; }
.ap-section-tight { padding-top: 30px; }
.ap-section-title {
    margin: 0 0 30px;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -.024em;
}
.ap-related { border-top: 1px solid var(--line-soft); margin-top: 64px; padding-top: 56px; }

/* ---------- 条目网格 ---------- */
.ap-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 44px 28px;
}
.ap-item { min-width: 0; }
.ap-item-link { display: block; }
.ap-item-media { border-radius: 14px; overflow: hidden; background: var(--bg-alt); }
.ap-item-media img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform .5s cubic-bezier(.2, .8, .3, 1);
}
.ap-item-link:hover .ap-item-media img { transform: scale(1.03); }
.ap-item-body { padding-top: 18px; }
.ap-item-title {
    margin: 0;
    font-size: 21px;
    line-height: 1.25;
    font-weight: 600;
    letter-spacing: -.02em;
}
.ap-item-link:hover .ap-item-title { color: var(--link); }
.ap-item-excerpt {
    margin: 10px 0 0;
    font-size: 15px;
    line-height: 1.5;
    color: var(--muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- 文章页 ---------- */
.ap-article { padding-top: 44px; }
.ap-article-head { max-width: var(--narrow); margin: 0 auto; }
.ap-article-title {
    margin: 0;
    font-size: 46px;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -.028em;
}
.ap-article-excerpt {
    margin: 18px 0 0;
    font-size: 21px;
    line-height: 1.45;
    color: var(--muted);
    letter-spacing: -.018em;
}
.ap-article-meta { margin: 18px 0 0; font-size: 13px; color: var(--muted); }
.ap-article-figure { margin: 44px 0 0; }
.ap-article-cover {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    border-radius: 18px;
    object-fit: cover;
}
.ap-article-figure figcaption {
    max-width: 1180px;
    margin: 12px auto 0;
    padding: 0 22px;
    font-size: 12px;
    color: var(--muted);
}
.ap-article-tags {
    max-width: var(--narrow);
    margin: 48px auto 0;
    padding-top: 22px;
    border-top: 1px solid var(--line-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.ap-tag {
    padding: 5px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-size: 12.5px;
    color: var(--text-2);
}
.ap-tag:hover { color: #fff; background: var(--dark); border-color: var(--dark); }

/* ---------- 正文 ---------- */
.ap-prose {
    max-width: var(--narrow);
    margin: 40px auto 0;
    font-size: 19px;
    line-height: 1.7;
    letter-spacing: -.014em;
    color: var(--text-2);
}
.ap-prose > * + * { margin-top: 1.2em; }
.ap-prose h2,
.ap-prose h3,
.ap-prose h4 { color: var(--text); font-weight: 700; letter-spacing: -.02em; line-height: 1.2; scroll-margin-top: 80px; }
.ap-prose h2 { margin-top: 2em; font-size: 30px; }
.ap-prose h3 { margin-top: 1.7em; font-size: 23px; }
.ap-prose h4 { margin-top: 1.5em; font-size: 19px; }
.ap-prose p { margin: 0; }
.ap-prose a { color: var(--link); }
.ap-prose a:hover { text-decoration: underline; }
.ap-prose strong { color: var(--text); font-weight: 600; }
.ap-prose ul,
.ap-prose ol { padding-left: 1.25em; }
.ap-prose li + li { margin-top: .45em; }
.ap-prose blockquote {
    margin: 1.6em 0;
    padding: 2px 0 2px 20px;
    border-left: 3px solid var(--line);
    color: var(--muted);
}
.ap-prose blockquote p { margin: 0; }
.ap-prose code {
    font-family: var(--mono);
    font-size: .85em;
    padding: 2px 6px;
    border-radius: 5px;
    background: var(--bg-alt);
    color: var(--text);
}
.ap-prose pre {
    margin: 1.7em 0;
    padding: 20px 22px;
    border-radius: 12px;
    background: var(--bg-alt);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.6;
    white-space: pre;
    word-break: normal;
}
.ap-prose pre code { background: none; padding: 0; font-size: inherit; white-space: pre; }
.ap-prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.7em 0;
    font-size: 15.5px;
}
.ap-prose th,
.ap-prose td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line-soft); }
.ap-prose th { color: var(--text); font-weight: 600; border-bottom-color: var(--line); }
.ap-prose hr { margin: 2.2em 0; border: 0; border-top: 1px solid var(--line-soft); }
.ap-prose img { border-radius: 14px; margin: 1.5em auto; }
.ap-prose figcaption { text-align: center; font-size: 12.5px; color: var(--muted); margin-top: 10px; }

/* ---------- 归档 ---------- */
.ap-archive { padding: 54px 0 22px; }
.ap-archive-title { margin: 0; font-size: 44px; font-weight: 700; letter-spacing: -.028em; }
.ap-archive-desc { margin: 12px 0 0; font-size: 21px; color: var(--muted); letter-spacing: -.018em; }
.ap-archive-count { margin: 10px 0 0; font-size: 13px; color: var(--muted); }

/* ---------- 分页 ---------- */
.ap-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 56px;
    padding-bottom: 8px;
    font-size: 15px;
}
.ap-page-num { font-size: 13px; color: var(--muted); }

/* ---------- 页脚 ---------- */
.ap-footer {
    margin-top: 84px;
    background: var(--bg-alt);
    color: var(--muted);
    font-size: 12.5px;
}
.ap-footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 40px;
}
.ap-footer-brand strong { display: block; color: var(--text); font-size: 14px; }
.ap-footer-brand p { margin: 6px 0 0; max-width: 420px; line-height: 1.5; }
.ap-footer-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.ap-footer-nav ul.nav { display: flex; flex-wrap: wrap; gap: 4px; list-style: none; margin: 0; padding: 0; }
.ap-footer-nav a { display: block; padding: 5px 10px; color: var(--text-2); }
.ap-footer-nav a:hover { color: var(--link); }
.ap-footer-copy {
    margin-top: 26px;
    padding: 18px 22px 26px;
    border-top: 1px solid var(--line);
    color: var(--muted);
}
.ap-footer-copy p { margin: 0; }

/* ---------- 错误页 ---------- */
.ap-error-body { display: grid; place-items: center; min-height: 100vh; }
.ap-error { text-align: center; padding: 40px 24px; }
.ap-error-code { margin: 0; font-size: 64px; font-weight: 700; letter-spacing: -.03em; }
.ap-error h1 { margin: 6px 0 22px; font-size: 19px; font-weight: 400; color: var(--muted); }

/* ---------- 响应式 ---------- */
@media (max-width: 1068px) {
    .ap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 24px; }
    .ap-hero-title { font-size: 40px; }
    .ap-article-title { font-size: 38px; }
}

@media (max-width: 734px) {
    .ap-wrap { padding: 0 18px; }
    .ap-grid { grid-template-columns: 1fr; gap: 34px; }
    .ap-hero-media img { aspect-ratio: 4 / 3; }
    .ap-slides { aspect-ratio: 16 / 11; }
    .ap-dots { right: 18px; bottom: 14px; }
    .ap-hero-body { padding-top: 26px; }
    .ap-hero-title { font-size: 30px; }
    .ap-hero-excerpt { font-size: 17px; }
    .ap-section { padding-top: 52px; }
    .ap-section-title { font-size: 25px; margin-bottom: 22px; }
    .ap-article-title { font-size: 29px; }
    .ap-article-excerpt { font-size: 17px; }
    .ap-prose { font-size: 17.5px; }
    .ap-prose h2 { font-size: 24px; }
    .ap-prose h3 { font-size: 20px; }
    .ap-nav-toggle { display: grid; }
    .ap-actions { margin-left: 0; }
    .ap-header-inner { gap: 8px; }
    .ap-brand { margin-right: auto; }
    .ap-nav {
        position: absolute;
        top: 48px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        padding: 8px 18px 14px;
        background: rgba(22, 22, 23, .97);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        backdrop-filter: saturate(180%) blur(20px);
        display: none;
    }
    .ap-nav.is-open { display: flex; }
    .ap-nav ul.nav { flex-direction: column; align-items: stretch; }
    .ap-nav ul.nav li a { padding: 10px 4px; line-height: 1.5; font-size: 15px; }
    .ap-pagination { flex-direction: column; align-items: flex-start; gap: 10px; }
}