:root { --tutorial-blue: #0d7ddd; --tutorial-ink: #333; }
body.tutorial-page { margin: 0; color: var(--tutorial-ink); background: #f6f7f8; font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; }
.tutorial-page button { cursor: pointer; font: inherit; }
.tutorial-page button:disabled { cursor: wait; opacity: .55; }
.tutorial-page button:focus-visible, .tutorial-page a:focus-visible { outline: 2px solid var(--tutorial-blue); outline-offset: 4px; }
.tutorial-main { width: min(1400px, calc(100% - 48px)); margin: 96px auto 100px; min-height: 60vh; }
.tutorial-tags { display: flex; gap: 12px; overflow-x: auto; padding: 0 0 24px; scrollbar-width: none; }
.tutorial-tag { border: 0; border-radius: 6px; white-space: nowrap; padding: 6px 16px; min-height: 32px; background: transparent; color: #666; font-size: 14px; }
.tutorial-tag[aria-pressed="true"] { color: var(--tutorial-blue); background: rgb(13 125 221 / 8%); }
.tutorial-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.tutorial-card { display: block; overflow: hidden; border-radius: 8px; background: #fff; color: inherit; text-decoration: none; }
.tutorial-card-cover { position: relative; aspect-ratio: 332 / 210; background: #e9e9e9; }
.tutorial-card-cover > img { display: block; width: 100%; height: 100%; object-fit: cover; }
.tutorial-card-title { margin: 0; padding: 20px 16px; font-size: 16px; font-weight: 500; line-height: 24px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tutorial-duration { position: absolute; right: 12px; bottom: 12px; display: inline-flex; align-items: center; gap: 5px; color: white; background: rgb(0 0 0 / 40%); border-radius: 20px; padding: 2px 8px; font-size: 12px; line-height: 16px; }
.tutorial-duration::before { content: ''; width: 0; height: 0; border-top: 4px solid transparent; border-bottom: 4px solid transparent; border-left: 6px solid white; }
.tutorial-status { text-align: center; padding: 48px 16px; color: #666; }
.tutorial-status button, .tutorial-more { border: 0; border-radius: 6px; padding: 10px 22px; background: white; color: var(--tutorial-blue); }
.tutorial-more { display: block; margin: 32px auto 0; }
.tutorial-detail-main { margin-top: 252px; }
.tutorial-reading-video { display: grid; grid-template-columns: minmax(0, 1024fr) minmax(300px, 352fr); align-items: start; gap: 24px; }
.tutorial-player { position: relative; min-width: 0; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 8px; background: #000; }
.tutorial-player video { width: 100%; height: 100%; display: block; object-fit: contain; }
.tutorial-share { position: absolute; top: 6px; right: 6px; z-index: 2; }
.tutorial-share-button { display: grid; place-items: center; width: 44px; height: 44px; cursor: pointer; }
.tutorial-share-icon { position: relative; display: block; width: 24px; height: 24px; }
.tutorial-share-icon img { position: absolute; max-width: none; }
.tutorial-share-background { top: 0; left: 0; }
.tutorial-share-corner { top: 5.8667px; left: 12.5333px; }
.tutorial-share-frame { top: 5.8667px; left: 5.8667px; }
.tutorial-share-arrow { top: 5.8667px; left: 11.8667px; }
.tutorial-share-status:not(:empty) { position: absolute; right: 10px; top: 44px; width: max-content; max-width: min(280px, 75vw); padding: 8px; border-radius: 4px; background: #fff; color: var(--tutorial-ink); font-size: 14px; }
.tutorial-share-link { width: 100%; border: 1px solid #ccc; color: inherit; background: #fff; }
.tutorial-reading-article .tutorial-info { position: relative; padding-right: 54px; }
.tutorial-play { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); display: grid; place-items: center; width: 64px; height: 64px; padding: 0; border: 0; border-radius: 50%; background: rgb(0 0 0 / 36%); }
.tutorial-play::after { content: ''; display: block; width: 0; height: 0; border-top: 13px solid transparent; border-bottom: 13px solid transparent; border-left: 20px solid white; }
.tutorial-play[hidden], .tutorial-media-error[hidden], .tutorial-more[hidden] { display: none; }
.tutorial-media-error { position: absolute; inset: 0; margin: 0; background: rgb(0 0 0 / 75%); color: white; display: grid; align-content: center; justify-items: center; gap: 16px; padding: 24px; text-align: center; }
.tutorial-media-error button { padding: 6px 18px; border: 1px solid #fff; border-radius: 6px; background: transparent; }
.tutorial-info { min-width: 0; }
.tutorial-official { display: flex; align-items: center; gap: 16px; font-size: 16px; line-height: 22px; }
.tutorial-official-avatar { position: relative; display: inline-block; width: 44px; height: 44px; flex: 0 0 44px; }
.tutorial-official-avatar img { width: 44px; height: 44px; }
.tutorial-official-avatar > span { position: absolute; inset: 0; display: grid; place-items: center; color: white; font-size: 9px; font-weight: 700; }
.tutorial-title { margin: 24px 0 12px; font-size: 20px; font-weight: 700; line-height: 1.5; overflow-wrap: anywhere; }
.tutorial-date { display: block; color: #999; font-size: 14px; line-height: 20px; }
.tutorial-summary { color: #666; font-size: 14px; line-height: 1.7; white-space: pre-wrap; margin: 12px 0 0; overflow-wrap: anywhere; }
.tutorial-episodes-title { font-size: 16px; font-weight: 700; margin: 28px 0 16px; line-height: 22px; }
.tutorial-episodes { display: flex; flex-direction: column; gap: 12px; max-height: 430px; overflow-y: auto; }
.tutorial-episode { width: 100%; display: flex; align-items: center; gap: 4px; text-align: left; min-height: 48px; padding: 12px 16px; border: 0; border-radius: 8px; background: #e9e9e9; color: #333; font-size: 14px; }
.tutorial-episode-number { flex: 0 0 auto; }
.tutorial-episode-indicator { width: 24px; height: 24px; flex: 0 0 24px; visibility: hidden; }
.tutorial-episode.is-current .tutorial-episode-indicator { visibility: visible; }
.tutorial-episode-indicator path { transform-box: fill-box; transform-origin: center; animation: tutorial-sound-wave 800ms ease-in-out infinite alternate; animation-play-state: paused; }
.tutorial-episode-indicator path:nth-child(2) { animation-duration: 650ms; animation-delay: 100ms; }
.tutorial-episode-indicator path:nth-child(3) { animation-duration: 950ms; animation-delay: 200ms; }
.tutorial-episode-indicator path:nth-child(4) { animation-duration: 700ms; animation-delay: 300ms; }
.tutorial-episode-indicator path:nth-child(5) { animation-duration: 850ms; animation-delay: 150ms; }
.tutorial-episodes.is-playing .tutorial-episode.is-current .tutorial-episode-indicator path { animation-play-state: running; }
@keyframes tutorial-sound-wave { from { transform: scaleY(1); } to { transform: scaleY(.35); } }
.tutorial-episode-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tutorial-reading-article { margin: 0 auto; padding: 40px 48px 56px; background: #fff; border-radius: 12px; }
.tutorial-reading-article .tutorial-title { font-size: 28px; }
.tutorial-article-body { font-size: 17px; line-height: 1.9; overflow-wrap: anywhere; margin-top: 32px; }
.tutorial-article-body p { margin: 16px 0; white-space: pre-wrap; }
.tutorial-article-body h1 { font-size: 28px; font-weight: 700; line-height: 1.5; margin: 36px 0 16px; }
.tutorial-article-body h2 { font-size: 24px; font-weight: 700; line-height: 1.5; margin: 36px 0 16px; }
.tutorial-article-body h3 { font-size: 19px; font-weight: 600; line-height: 1.5; margin: 24px 0 12px; }
.tutorial-article-body ul, .tutorial-article-body ol { padding-left: 1.6em; margin: 16px 0; }
.tutorial-article-body ul { list-style: disc; }
.tutorial-article-body ol { list-style: decimal; }
.tutorial-article-body li p { margin: 4px 0; }
.tutorial-article-body a { color: var(--tutorial-blue); text-decoration: underline; }
.tutorial-article-body figure { margin: 24px 0; }
.tutorial-article-body figure img { display: block; width: auto; max-width: 100%; height: auto; max-height: 1000px; margin: auto; border-radius: 8px; }
.tutorial-article-body figcaption { color: #999; font-size: 12px; line-height: 1.6; text-align: center; margin-top: 8px; }
.tutorial-article-body blockquote { border-left: 3px solid #d7dce2; margin: 24px 0; padding: 4px 20px; color: #666; }
.tutorial-article-body hr { border: 0; border-top: 1px solid #e9e9e9; margin: 32px 0; }
.tutorial-step { margin: 28px 0; }
.tutorial-step-heading { display: flex; align-items: center; gap: 10px; }
.tutorial-step-number { display: inline-grid; place-items: center; width: 28px; height: 28px; flex: 0 0 28px; color: white; background: var(--tutorial-blue); border-radius: 50%; font-size: 14px; }
.tutorial-callout { padding: 4px 20px; border-left: 3px solid var(--tutorial-blue); border-radius: 0 8px 8px 0; background: #edf6fd; margin: 24px 0; }
.tutorial-callout.is-warning { border-left-color: #cc8b2b; background: #fff7e8; }
.tutorial-preview-page .tutorial-main { margin-top: 24px; margin-bottom: 24px; }
.tutorial-app-mode { scrollbar-gutter: auto; }
.tutorial-app-mode body { background: #f5f5f5; }
.tutorial-app-mode #header-placeholder, .tutorial-app-mode #footer-placeholder { display: none; }
.tutorial-app-mode .tutorial-main { margin-top: 0; }
@media (max-width: 1100px) {
    .tutorial-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .tutorial-detail-main { margin-top: 130px; }
    .tutorial-reading-video { grid-template-columns: minmax(0, 1fr) 300px; }
}
@media (max-width: 767px) {
    .tutorial-main { width: calc(100% - 24px); margin-top: 86px; margin-bottom: 40px; }
    .tutorial-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .tutorial-card-cover { aspect-ratio: 170 / 100; }
    .tutorial-card-title { padding: 10px 8px; font-size: 12px; line-height: 20px; }
    .tutorial-tag { font-size: 12px; padding: 4px 12px; min-height: 28px; }
    .tutorial-tags { padding-bottom: 12px; gap: 8px; }
    .tutorial-duration { top: 12px; left: 12px; right: auto; bottom: auto; font-size: 10px; line-height: 12px; }
    .tutorial-detail-main { width: 100%; margin-top: 72px; }
    .tutorial-reading-video { display: flex; flex-direction: column; gap: 0; }
    .tutorial-player { width: 100%; aspect-ratio: 375 / 220; border-radius: 0; }
    .tutorial-info { width: 100%; padding: 16px 16px; box-sizing: border-box; }
    .tutorial-title { font-size: 16px; margin-top: 12px; }
    .tutorial-official { gap: 18px; }
    .tutorial-episodes-title { font-size: 14px; line-height: 20px; margin-top: 19px; }
    .tutorial-episodes { max-height: none; }
    .tutorial-reading-article { padding: 0 16px 32px; border-radius: 0; }
    .tutorial-reading-article .tutorial-info { padding-left: 0; padding-right: 0; }
    .tutorial-reading-article .tutorial-title { font-size: 24px; }
    .tutorial-article-body { font-size: 16px; margin-top: 0; }
    .tutorial-article-body h1 { font-size: 26px; }
    .tutorial-article-body h2 { font-size: 22px; }
    .tutorial-article-body h3 { font-size: 18px; }
    .tutorial-preview-page .tutorial-main { margin-top: 0; }
}