:root {
    --bg: #0d0d12;
    --bg2: #13131a;
    --card-bg: rgba(20, 18, 32, 0.85);
    --card-border: rgba(212, 163, 58, 0.18);
    --gold: #d4a33a;
    --gold-light: #e8c86a;
    --gold-glow: rgba(212, 163, 58, 0.25);
    --purple: #7c3aed;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --text-dark: #64748b;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--bg);
    min-height: 100vh;
    color: var(--text);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #1a1a2e; }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 4px; }

.container { max-width: 1400px; margin: 0 auto; padding: 20px; }

.breadcrumb { margin-bottom: 20px; font-size: 13px; color: var(--text-dark); }
.breadcrumb a { color: var(--gold); text-decoration: none; }
.breadcrumb .separator { margin: 0 8px; color: var(--text-dark); }

/* ===== 内容卡片 ===== */
.content-card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
}

/* ===== 标题 + 元信息 ===== */
.content-card .title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.4;
}

.content-card .meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-dark);
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(212,163,58,0.08);
}
.content-card .meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.content-card .type-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
}
.type-question { background: rgba(245,158,11,0.1); color: #fcd34d; }
.type-tutorial { background: rgba(124,58,237,0.1); color: #a78bfa; }
.content-card .cat-tag,
.content-card .version-tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 500;
}
.content-card .cat-tag { background: rgba(59,130,246,0.1); color: #60a5fa; }
.content-card .version-tag { background: rgba(212,163,58,0.1); color: var(--gold); }

/* ===== 内容正文 ===== */
.content-body {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-dim);
}
.content-body h1,
.content-body h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin: 24px 0 12px;
}
.content-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--gold-light);
    margin: 20px 0 10px;
}
.content-body p { margin-bottom: 14px; }
.content-body a { color: var(--gold); text-decoration: underline; }
.content-body ul,
.content-body ol { padding-left: 20px; margin-bottom: 14px; }
.content-body li { margin-bottom: 6px; }
.content-body pre {
    background: var(--bg2);
    border: 1px solid rgba(212,163,58,0.08);
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    margin-bottom: 14px;
}
.content-body code {
    background: rgba(255,255,255,0.06);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
}
.content-body pre code { background: none; padding: 0; }
.content-body blockquote {
    border-left: 3px solid var(--gold);
    padding: 10px 16px;
    margin: 14px 0;
    background: rgba(212,163,58,0.04);
    border-radius: 0 8px 8px 0;
}
.content-body img { max-width: 100%; border-radius: 8px; margin: 16px 0; }
.content-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 14px;
}
.content-body th,
.content-body td {
    border: 1px solid rgba(212,163,58,0.12);
    padding: 8px 12px;
    text-align: left;
}
.content-body th { background: rgba(212,163,58,0.06); color: var(--gold-light); }

/* ===== 付费锁 ===== */
.purchase-locked {
    text-align: center;
    padding: 40px 20px;
    background: rgba(212,163,58,0.04);
    border: 1px dashed rgba(212,163,58,0.2);
    border-radius: 12px;
    margin: 20px 0;
}
.lock-icon { font-size: 48px; margin-bottom: 12px; }
.lock-text { font-size: 14px; color: var(--text-dim); margin-bottom: 16px; }
.btn-purchase {
    padding: 10px 32px;
    border-radius: 30px;
    border: none;
    background: linear-gradient(135deg, var(--gold), #f59e0b);
    color: #1a1a2e;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

/* ===== 打赏按钮 ===== */
.tip-section { margin-top: 24px; text-align: center; display: flex; align-items: center; justify-content: center; gap: 12px; }
.btn-tip {
    padding: 10px 28px;
    border-radius: 30px;
    border: 1px solid rgba(212,163,58,0.2);
    background: rgba(212,163,58,0.06);
    color: var(--gold-light);
    font-size: 13px;
    cursor: pointer;
}
.btn-tip:hover { background: rgba(212,163,58,0.12); }
.tip-stats { font-size: 12px; color: var(--text-dark); }

/* ===== 打赏弹窗 ===== */
.tip-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.tip-modal {
    background: var(--bg2);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    max-width: 380px;
    width: 90%;
    overflow: hidden;
}
.tip-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(212,163,58,0.08);
}
.tip-modal-header h3 { font-size: 16px; color: var(--text); font-weight: 600; margin: 0; }
.tip-modal-body { padding: 20px; }
.tip-modal-body p { font-size: 13px; color: var(--text-dim); margin-bottom: 14px; }
.tip-modal-body p strong { color: var(--text); }
.tip-amount-btns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}
.tip-amount-btn {
    padding: 10px;
    border-radius: 10px;
    border: 1px solid rgba(212,163,58,0.12);
    background: rgba(255,255,255,0.02);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}
.tip-amount-btn:hover { border-color: var(--gold); }
.tip-amount-btn.selected {
    background: rgba(212,163,58,0.12);
    border-color: var(--gold);
    color: var(--gold-light);
}
.tip-custom-input {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid rgba(212,163,58,0.12);
    background: rgba(255,255,255,0.02);
    color: var(--text);
    font-size: 13px;
    margin-bottom: 8px;
    box-sizing: border-box;
}
.tip-limit-info { font-size: 11px; color: var(--text-dark); }
.tip-modal-footer {
    padding: 12px 20px;
    border-top: 1px solid rgba(212,163,58,0.08);
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}
.tip-modal-footer button {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid rgba(212,163,58,0.12);
    background: transparent;
    color: var(--text-dim);
    font-size: 13px;
    cursor: pointer;
}
.tip-modal-footer button:hover { background: rgba(255,255,255,0.04); }
.btn-tip-confirm {
    background: linear-gradient(135deg, var(--gold), #f59e0b) !important;
    color: #1a1a2e !important;
    font-weight: 600 !important;
    border: none !important;
}

/* ===== 回答区 ===== */
.answers-section { margin-bottom: 24px; }
.answers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid rgba(212,163,58,0.08);
    margin-bottom: 16px;
}
.answers-title { font-size: 16px; font-weight: 600; color: var(--text); }

.answer-item {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(212,163,58,0.06);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}
.answer-meta {
    font-size: 12px;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: flex;
    gap: 12px;
    align-items: center;
}
.answer-body, .answer-content { font-size: 14px; line-height: 1.7; color: var(--text-dim); }
.answer-body p, .answer-content p { margin-bottom: 8px; }
.answer-body code, .answer-content code {
    background: rgba(212,163,58,0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}
.answer-body pre, .answer-content pre {
    background: rgba(0,0,0,0.25);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 13px;
    margin-bottom: 10px;
}
.answer-body img, .answer-content img { max-width: 100%; border-radius: 8px; }

/* 回答评分区域 */
.answer-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-top: 8px;
    border-top: 1px solid rgba(212,163,58,0.06);
}
.rating-btn {
    background: transparent;
    border: 1px solid rgba(212,163,58,0.1);
    border-radius: 6px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}
.rating-btn:hover { border-color: var(--gold); }
.rating-count { font-size: 13px; color: var(--text); min-width: 16px; text-align: center; }
.rating-info { font-size: 11px; color: var(--text-dark); margin-left: 4px; }

/* 采纳按钮/标签 */
.btn-accept {
    padding: 4px 12px;
    border-radius: 6px;
    border: 1px solid var(--gold);
    background: rgba(212,163,58,0.1);
    color: var(--gold-light);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-accept:hover { background: rgba(212,163,58,0.2); }
.accept-badge {
    padding: 2px 10px;
    border-radius: 4px;
    background: rgba(34,197,94,0.12);
    color: #4ade80;
    font-size: 12px;
}

/* 回答表单 */
.answer-form { margin-top: 16px; }
.answer-form textarea {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(212,163,58,0.12);
    background: rgba(255,255,255,0.02);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 8px;
}
.answer-form .btn-submit {
    padding: 10px 28px;
    border-radius: 30px;
    border: none;
    background: linear-gradient(135deg, var(--gold), #f59e0b);
    color: #1a1a2e;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

/* ===== 详情页元信息行所有 span 右对齐（教程列表页 meta 也统一） ===== */
.content-card .meta { justify-content: flex-end; }

/* ===== 相关推荐 ===== */
.related-section { margin-bottom: 20px; }
.related-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}
.related-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.related-item {
    padding: 8px 0;
    cursor: pointer;
    transition: all 0.2s;
    border-bottom: 1px solid rgba(212,163,58,0.06);
    position: relative;
}
.related-item:last-child { border-bottom: none; }
.related-item:hover { padding-left: 4px; }
.ri-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dim);
    line-height: 1.5;
    display: block;
}
.ri-title:hover { color: var(--gold-light); }
.ri-meta {
    font-size: 11px;
    color: var(--text-dark);
    white-space: nowrap;
    margin-right: 6px;
}

/* ===== 分享弹窗 ===== */
.share-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); z-index: 9999;
    display: none; align-items: center; justify-content: center;
}
.share-overlay.show { display: flex; }
.share-modal {
    background: var(--bg2); border: 1px solid var(--card-border);
    border-radius: 16px; padding: 32px;
    text-align: center; max-width: 340px; width: 90%;
}
.share-modal h3 { font-size: 16px; margin-bottom: 20px; color: var(--text); }
.qrcode-box { display: flex; justify-content: center; margin-bottom: 16px; }
.share-url { font-size: 12px; color: var(--text-dark); word-break: break-all; margin-bottom: 16px; padding: 8px; background: rgba(0,0,0,0.2); border-radius: 8px; }
.close-share {
    padding: 8px 32px; border-radius: 30px; border: 1px solid var(--card-border);
    background: transparent; color: var(--text-dim); cursor: pointer; font-size: 13px;
}

/* ===== 桌面/手机端显隐 ===== */
.desktop-only { display: block; }
.mobile-only { display: none !important; }

/* ===== 移动端导航栏 ===== */
.detail-nav {
    display: none;
    position: sticky; top: 0; z-index: 100;
    background: rgba(13,13,18,0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212,163,58,0.1);
    padding: 12px 16px;
    align-items: center;
    justify-content: space-between;
}
.detail-nav .back-btn { font-size: 20px; cursor: pointer; color: var(--gold); }
.detail-nav .nav-title {
    flex: 1; text-align: center;
    font-size: 15px; font-weight: 500;
    color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    margin: 0 12px;
}
.detail-nav .share-btn { font-size: 18px; cursor: pointer; }

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 20px;
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--gold); color: #0d0d12;
    border: none; font-size: 18px; cursor: pointer;
    display: none; align-items: center; justify-content: center;
    box-shadow: 0 4px 12px rgba(212,163,58,0.3);
}

/* ===== 加载 / 错误 ===== */
.loading { text-align: center; padding: 60px 20px; color: var(--text-dark); font-size: 15px; }
.error { text-align: center; padding: 60px 20px; color: #f87171; font-size: 15px; }

/* ===== 手机端响应式 ===== */
@media (max-width: 768px) {
    .container { padding: 12px; }
    .content-card { padding: 20px; border-radius: 12px; }
    .content-card .title { font-size: 20px; }
    .content-card .meta { gap: 8px; font-size: 12px; }
    .detail-nav { display: flex; }
    .desktop-only { display: none !important; }
    .mobile-only { display: block !important; }
    .breadcrumb { display: none; }
    .related-list { grid-template-columns: 1fr; }
    .back-to-top { display: flex; }
}