/* 二十四节气成品页 · 年度循环主题（配合 learn.css 基座） */

.learn-body.st-body {
    --learn-accent: #b06a3a;          /* 大地棕，节气主色 */
    --learn-accent-soft: #f6ecdf;
    --st-spring: #6ba368;             /* 春 · 青 */
    --st-summer: #d98a4e;             /* 夏 · 暑 */
    --st-autumn: #c9a227;             /* 秋 · 金 */
    --st-winter: #5b86a6;             /* 冬 · 寒 */
    --st-paper: #fbf7ef;              /* 宣纸底 */
}

/* ===== 节气歌（镇页之宝） ===== */
.st-song {
    background: var(--st-paper);
    border: 1px solid var(--learn-border);
    border-radius: 14px;
    padding: 28px 24px 22px;
    margin: 8px 0 28px;
    text-align: center;
}
.st-song h2 { margin: 0 0 14px; font-size: 16px; color: var(--learn-ink-light); font-weight: 600; letter-spacing: 2px; }
.st-song-lyrics {
    font-family: "STKaiti", "KaiTi", "PingFang SC", serif;
    font-size: clamp(20px, 5vw, 30px);
    line-height: 2;
    color: #3a2c1d;
    letter-spacing: 3px;
}
.st-song-lyrics .st-char { transition: color .15s, background .15s; padding: 0 1px; border-radius: 4px; }
.st-song-lyrics .st-char.active { background: rgba(217,138,78,.28); color: #b0531f; font-weight: 700; }
.st-song-tail { margin-top: 12px; font-size: 14px; color: var(--learn-ink-light); line-height: 1.8; }
.st-song-audio { margin-top: 16px; }
.st-song-play {
    display: inline-flex; align-items: center; gap: 7px;
    background: var(--learn-accent); color: #fff; border: none;
    padding: 9px 20px; border-radius: 999px; font-size: 15px; cursor: pointer;
    transition: filter .2s;
}
.st-song-play:hover { filter: brightness(1.07); }
.st-song-play[disabled] { opacity: .5; cursor: default; }

/* ===== 年轮条（24 节气一年循环导航） ===== */
.st-yearbar { margin: 6px 0 26px; }
.st-yearbar-track {
    display: grid;
    grid-template-columns: repeat(24, 1fr);
    gap: 3px;
    border-radius: 10px;
    overflow: hidden;
}
.st-yb-cell {
    aspect-ratio: 1 / 2.2;
    border: none; padding: 0; cursor: pointer;
    font-size: 0;
    position: relative;
    transition: transform .15s;
}
.st-yb-cell:hover { transform: scaleY(1.12); }
.st-yb-cell.spring { background: var(--st-spring); }
.st-yb-cell.summer { background: var(--st-summer); }
.st-yb-cell.autumn { background: var(--st-autumn); }
.st-yb-cell.winter { background: var(--st-winter); }
.st-yearbar-legend { display: flex; justify-content: center; gap: 18px; margin-top: 10px; font-size: 13px; color: var(--learn-ink-light); }
.st-yearbar-legend span { display: inline-flex; align-items: center; gap: 5px; }
.st-yearbar-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* ===== 四季分区 + 节气卡 ===== */
.st-season { margin-bottom: 30px; scroll-margin-top: 16px; }
.st-season-head {
    display: flex; align-items: baseline; gap: 10px;
    padding-bottom: 8px; margin-bottom: 14px;
    border-bottom: 2px solid var(--season-color, var(--learn-accent));
}
.st-season-head h2 { margin: 0; font-size: 22px; color: var(--season-color); }
.st-season-head .st-season-sub { font-size: 13px; color: var(--learn-ink-light); }

.st-terms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
}
.st-term {
    border: 1px solid var(--learn-border);
    border-left: 4px solid var(--season-color, var(--learn-accent));
    border-radius: 10px;
    background: var(--learn-card);
    padding: 12px 14px;
    cursor: pointer;
    transition: box-shadow .18s, transform .12s;
    scroll-margin-top: 16px;
}
.st-term:hover { box-shadow: 0 4px 16px rgba(0,0,0,.08); transform: translateY(-2px); }
.st-term-name { font-size: 18px; font-weight: 700; color: var(--learn-ink); }
.st-term-pinyin { font-size: 12px; color: var(--learn-ink-light); margin-left: 6px; font-weight: 400; }
.st-term-date { font-size: 13px; color: var(--learn-ink-light); margin-top: 2px; }
.st-term-oneliner { font-size: 13px; color: var(--learn-ink); margin-top: 6px; line-height: 1.5; }
.st-term[aria-expanded="true"] { box-shadow: 0 4px 16px rgba(0,0,0,.1); }

/* ===== 详情面板（点开展开，内容始终在 DOM 利于 SEO） ===== */
.st-detail {
    grid-column: 1 / -1;
    display: none;
    border: 1px solid var(--learn-border);
    border-top: 3px solid var(--season-color, var(--learn-accent));
    border-radius: 12px;
    background: var(--st-paper);
    overflow: hidden;
    margin-top: 2px;
}
.st-detail.open { display: grid; }
@media (min-width: 620px) { .st-detail.open { grid-template-columns: 300px 1fr; } }
.st-detail-img { width: 100%; aspect-ratio: 1/1; object-fit: cover; background: #ece5d8; display: block; }
.st-detail-body { padding: 18px 20px 22px; }
.st-detail-body h3 { margin: 0 0 2px; font-size: 22px; }
.st-detail-meta { font-size: 13px; color: var(--learn-ink-light); margin-bottom: 12px; }
.st-detail-meta .st-huangjing { color: var(--season-color); font-weight: 600; }

.st-sanhou { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.st-hou {
    flex: 1 1 0; min-width: 80px;
    background: #fff; border: 1px solid var(--learn-border); border-radius: 8px;
    padding: 8px 6px; text-align: center;
}
.st-hou .st-hou-label { font-size: 11px; color: var(--learn-ink-light); display: block; }
.st-hou .st-hou-text { font-size: 14px; color: #3a2c1d; font-weight: 600; margin-top: 2px; }

.st-fields { display: grid; gap: 10px; margin-top: 8px; }
.st-field { font-size: 14px; line-height: 1.7; }
.st-field .st-field-k { font-weight: 700; color: var(--season-color); margin-right: 4px; }
.st-poem {
    margin-top: 12px; padding: 12px 14px;
    background: #fff; border-radius: 8px; border: 1px dashed var(--learn-border);
    font-family: "STKaiti", "KaiTi", serif;
}
.st-poem-text { font-size: 16px; color: #3a2c1d; line-height: 1.8; }
.st-poem-cite { font-size: 12px; color: var(--learn-ink-light); margin-top: 4px; text-align: right; }

/* ===== 资料来源（可审计 provenance） ===== */
.st-sources { font-size: 12px; color: var(--learn-ink-light); line-height: 1.7; }
.st-sources summary { cursor: pointer; font-size: 13px; color: var(--learn-accent); }
.st-sources p { margin: 8px 0 0; }

@media (max-width: 480px) {
    .st-terms-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
    .st-song-lyrics { letter-spacing: 1px; }
}

/* ===== 自适应练习 ===== */
.st-practice .stp-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.st-practice .stp-head h2 { margin: 0; }
.stp-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--learn-accent); color: #fff; font-weight: 700;
    padding: 6px 14px; border-radius: 999px; font-size: 15px;
    transition: transform .2s;
}
.stp-badge.pulse { animation: stpPulse .4s ease; }
@keyframes stpPulse { 0%{transform:scale(1);} 40%{transform:scale(1.28);background:#e0902f;} 100%{transform:scale(1);} }
.stp-title-row { font-size: 13px; color: var(--learn-ink-light); margin: 8px 0 0; }
.stp-title-row strong { color: var(--learn-accent); }

.stp-card { margin-top: 16px; border: 1px solid var(--learn-border); border-radius: 12px; background: var(--learn-card); padding: 18px 18px 20px; }
.stp-q { font-size: 17px; font-weight: 600; line-height: 1.6; margin-bottom: 14px; }
.stp-lv { display: inline-block; font-size: 11px; font-weight: 700; color: #fff; border-radius: 5px; padding: 1px 7px; margin-right: 8px; vertical-align: middle; }
.stp-lv1 { background: var(--st-spring); }
.stp-lv2 { background: var(--st-summer); }
.stp-lv3 { background: var(--st-winter); }
.stp-opts { display: grid; gap: 10px; }
@media (min-width: 520px) { .stp-opts { grid-template-columns: 1fr 1fr; } }
.stp-opt {
    text-align: left; font-size: 15px; padding: 12px 14px; cursor: pointer;
    border: 1.5px solid var(--learn-border); border-radius: 10px; background: #fff;
    color: var(--learn-ink); transition: border-color .15s, background .15s;
}
@media (hover: hover) { .stp-opt:hover:not(:disabled) { border-color: var(--learn-accent); background: var(--learn-accent-soft); } }
.stp-opt:disabled { cursor: default; }
.stp-opt.right { border-color: var(--st-spring); background: #eaf6ea; font-weight: 700; }
.stp-opt.wrong { border-color: #d9534f; background: #fbeaea; }
.stp-fb { margin-top: 14px; font-size: 14px; line-height: 1.7; color: var(--learn-ink-light); }
.stp-fb .stp-ok { color: var(--st-spring); font-weight: 700; }
.stp-fb .stp-no { color: #d9534f; font-weight: 700; }
.stp-next {
    display: block; margin: 14px 0 0; margin-left: auto;
    background: var(--learn-accent); color: #fff; border: none;
    padding: 9px 20px; border-radius: 999px; font-size: 15px; cursor: pointer;
}
.stp-next:hover { filter: brightness(1.07); }
.stp-unlock { margin-top: 12px; padding: 10px 14px; background: var(--st-paper); border: 1px dashed var(--learn-accent); border-radius: 10px; font-size: 14px; }
.stp-unlock strong { color: var(--learn-accent); }
.stp-share { margin-left: 10px; background: #fff; border: 1.5px solid var(--learn-accent); color: var(--learn-accent); border-radius: 999px; padding: 4px 14px; font-size: 13px; cursor: pointer; }

/* 加分飞行气泡 */
.stp-fly {
    position: fixed; z-index: 9999; pointer-events: none;
    font-weight: 800; font-size: 20px; color: var(--learn-accent);
    transform: translate(-50%, -50%); transition: transform .6s cubic-bezier(.4,0,.2,1), opacity .6s ease;
    text-shadow: 0 1px 3px rgba(0,0,0,.15);
}

/* 资料来源列表（常显，不折叠） */
.st-source-list { margin: 6px 0 0; padding-left: 18px; }
.st-source-list li { margin: 4px 0; }
.st-source-list a { color: var(--learn-accent); word-break: break-all; }

.stp-title-max { color: var(--learn-accent); font-size: 12px; margin-left: 6px; }

/* ===== 分享本页 ===== */
.st-sharepage { text-align: center; }
.st-sharepage-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--learn-accent); color: #fff; border: none;
    padding: 12px 30px; border-radius: 999px; font-size: 16px; font-weight: 600;
    cursor: pointer; transition: filter .2s, transform .12s;
}
@media (hover: hover) { .st-sharepage-btn:hover { filter: brightness(1.08); } }
.st-sharepage-btn:active { transform: scale(.97); }
.st-sharepage-tip { display: block; margin-top: 10px; font-size: 13px; color: var(--learn-ink-light); min-height: 18px; }

/* 报错按钮：适度提升可见性（描边色，一眼可点；仍明显弱于分享）—— 仅覆盖本页，不动共享 partial */
.st-body .re-disclaimer .re-btn {
    border-color: var(--learn-accent); color: var(--learn-accent);
    font-size: 13px; padding: 4px 14px;
}
.st-body .re-disclaimer .re-btn:hover:not(:disabled) {
    background: var(--learn-accent); color: #fff; border-color: var(--learn-accent);
}

/* ===== 节气分享卡（SOP 第③段传播 · B 方案） ===== */
.st-share-btn {
    display: inline-flex; align-items: center; gap: 7px;
    margin-top: 16px;
    background: var(--season-color, var(--learn-accent)); color: #fff; border: none;
    padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
    cursor: pointer; transition: filter .2s, transform .12s;
}
@media (hover: hover) { .st-share-btn:hover { filter: brightness(1.08); } }
.st-share-btn:active { transform: scale(.97); }

.stsh-modal {
    display: none; position: fixed; inset: 0; z-index: 1200;
    background: rgba(28,20,12,.55); padding: 20px;
    align-items: center; justify-content: center;
}
.stsh-modal.active { display: flex; }
.stsh-box {
    background: #fff; border-radius: 16px; padding: 18px 18px 16px;
    width: 100%; max-width: 420px; max-height: 92vh; overflow-y: auto; text-align: center;
}
.stsh-box h3 { margin: 0 0 10px; font-size: 17px; color: var(--learn-ink); }
.stsh-stage { min-height: 200px; display: flex; align-items: center; justify-content: center; }
.stsh-loading { color: var(--learn-ink-light); font-size: 14px; padding: 60px 0; }
.stsh-img {
    width: 100%; max-width: 360px; height: auto; display: block; margin: 0 auto;
    border-radius: 12px; box-shadow: 0 6px 24px rgba(0,0,0,.18);
}
.stsh-actions { display: flex; gap: 10px; justify-content: center; margin-top: 12px; }
.stsh-actions button {
    padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
    cursor: pointer; border: 1.5px solid var(--learn-accent); font-family: inherit;
}
.stsh-actions .stsh-primary { background: var(--learn-accent); color: #fff; }
.stsh-actions .stsh-ghost { background: #fff; color: var(--learn-accent); }
@media (hover: hover) { .stsh-actions button:hover { filter: brightness(1.06); } }