/* custom.css v3 - 科技感配色 · redian001.com */
/* === 科技感色彩体系 === */
:root{
  --c-primary:#6366f1;--c-primary-l:#818cf8;--c-primary-d:#4f46e5;
  --c-accent:#06b6d4;--c-accent-l:#22d3ee;
  --c-bg:#f8fafc;--c-surface:#ffffff;--c-surface2:#f1f5f9;
  --c-border:#e2e8f0;--c-border-l:#f1f5f9;
  --c-text:#0f172a;--c-text2:#475569;--c-text3:#94a3b8;
  --c-danger:#ef4444;--c-success:#10b981;
  --gradient:linear-gradient(135deg,#6366f1,#06b6d4);
  --gradient2:linear-gradient(135deg,#4f46e5,#0891b2);
  --radius-sm:6px;--radius:10px;--radius-lg:14px;
  --shadow:0 1px 3px rgba(0,0,0,.04);--shadow-md:0 4px 12px rgba(0,0,0,.06);
  --ease:cubic-bezier(.4,0,.2,1);--dur:.25s;
}
[data-theme=dark]{
  --c-bg:#0f172a;--c-surface:#1e293b;--c-surface2:#334155;
  --c-border:#334155;--c-border-l:#1e293b;
  --c-text:#f1f5f9;--c-text2:#94a3b8;--c-text3:#64748b;
  --shadow:0 1px 3px rgba(0,0,0,.2);--shadow-md:0 4px 12px rgba(0,0,0,.3);
}

/* === 全局基础 === */
body{background:var(--c-bg)!important;color:var(--c-text)!important}
a{color:var(--c-primary)}a:hover{color:var(--c-primary-l)}
::selection{background:rgba(99,102,241,.2)}
.main{max-width:720px;border-left:none!important;border-right:none!important;background:var(--c-bg)}
.container{gap:40px}

/* === 帖子卡片微调 === */
.post{transition:all var(--dur) var(--ease);background:var(--c-surface);border-radius:var(--radius);margin:8px 16px}
.post:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)!important}
.post-author{color:var(--c-text)}.post-author:hover{color:var(--c-primary)}
.post-title-link{color:var(--c-text)}.post-title-link:hover{color:var(--c-primary)}
.post-text{color:var(--c-text);line-height:1.7}.post-text a{color:var(--c-primary)}
.post-text code{background:var(--c-surface2);padding:2px 6px;border-radius:4px;font-size:.88em;word-break:break-all}
.post-text pre{background:var(--c-surface2);border-radius:var(--radius-sm);padding:12px;overflow-x:auto;font-size:.85em;line-height:1.5;white-space:pre-wrap;word-break:break-all;margin:8px 0}
.post-text pre code{background:0 0;padding:0;font-size:1em}
.post-thumb-link{display:block;margin:8px 0}
.post-thumb{width:100%;max-width:100%;border-radius:var(--radius-sm);max-height:360px;object-fit:cover}
.post-text p{margin-bottom:12px;line-height:1.75}
.post-text.expanded-content{line-height:1.85}

/* === 帖子图片 === */
/* 折叠状态：固定缩略图大小，防止大图溢出 */
.post-text .post-img,
.post-text:not(.expanded-content) img{display:block;width:200px!important;height:190px!important;max-width:100%;object-fit:cover;border-radius:var(--radius);margin:8px 0;cursor:pointer}
/* 展开状态：自适应宽度，限制最大高度防止远程大图溢出 */
.post-text.expanded-content img,
.post-text.expanded-content .post-img{width:auto!important;height:auto!important;max-width:100%;max-height:480px;object-fit:contain;border-radius:var(--radius);margin:8px 0}

/* === 展开/收起按钮 === */
.toggle-link{float:right;display:inline-flex;align-items:center;padding:2px 8px;margin-left:8px;color:var(--c-primary);font-size:11px;font-weight:600;cursor:pointer;white-space:nowrap;border-radius:var(--radius-sm);background:var(--c-bg);border:1px solid var(--c-border);transition:all var(--dur) var(--ease)}
.toggle-link:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* === 互动操作栏 === */
.post-actions{display:flex;align-items:center;gap:20px;margin-top:4px}
.post-action{display:flex;align-items:center;gap:4px;color:var(--c-text3);font-size:13px;text-decoration:none}.post-action:hover{color:var(--c-primary)}
.post-like-btn{display:flex;align-items:center;gap:4px;background:none;border:none;font-size:13px;cursor:pointer;padding:0;font-family:inherit;color:var(--c-text3)}.post-like-btn:hover{color:var(--c-danger)}

/* === 头像 === */
.avatar{background:var(--gradient)!important;box-shadow:0 2px 8px rgba(99,102,241,.2)}
.avatar-link:hover .avatar{transform:scale(1.08)}

/* === 删除按钮 === */
.action-delete{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;border:none;background:transparent;color:var(--c-text3);cursor:pointer;padding:0;transition:all var(--dur) var(--ease)}.action-delete:hover{background:#fee2e2;color:#dc2626}

/* === 卡片内确认删除条 === */
.del-confirm-bar{display:flex;align-items:center;gap:10px;margin-top:12px;padding:10px 14px;border-radius:var(--radius);background:#fef2f2;border:1px solid #fecaca;animation:fadeInUp .2s var(--ease)}
[data-theme=dark] .del-confirm-bar{background:#3b1010;border-color:#7f1d1d}
.del-confirm-yes{padding:6px 16px;border:none;border-radius:6px;background:#dc2626;color:#fff;font-size:13px;font-weight:600;cursor:pointer;transition:opacity .2s}.del-confirm-yes:hover{opacity:.85}
.del-confirm-no{padding:6px 16px;border:1px solid #d1d5db;border-radius:6px;background:transparent;color:var(--c-text2);font-size:13px;cursor:pointer;transition:all .2s}.del-confirm-no:hover{background:var(--c-surface2)}

/* === 链接/标签 === */
.hashtag-link{color:var(--c-accent)!important}.hashtag-link:hover{color:var(--c-accent-l)!important}

/* === 动画 === */
@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.post{animation:fadeInUp .35s var(--ease) both}

/* === 响应式微调 === */
@media(max-width:768px){.post{padding:14px}.post-text{font-size:14px}.post-title{font-size:16px}.post-text img,.post-text .post-img{max-height:240px}.post-text.expanded-content img,.post-text.expanded-content .post-img{max-height:320px}}
@media(prefers-reduced-motion:reduce){*,*::after,*::before{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* === 分类页面 === */
.categories-header{text-align:center;padding:24px 16px 12px}
.categories-header h1{font-size:24px;font-weight:800;color:var(--c-text);margin:0 0 8px;letter-spacing:-0.02em}
.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;padding:8px 16px 32px}
.category-card{display:flex;align-items:center;gap:14px;padding:18px 20px;border-radius:var(--radius-lg);border:1px solid var(--c-border);background:var(--c-surface);text-decoration:none;transition:all var(--dur) var(--ease);overflow:hidden;position:relative}
.category-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--card-color);border-radius:var(--radius-lg) 0 0 var(--radius-lg);opacity:0;transition:opacity var(--dur) var(--ease)}
.category-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--card-color)}
.category-card:hover::before{opacity:1}
.category-icon{font-size:28px;flex-shrink:0;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--c-bg);border-radius:var(--radius);transition:all var(--dur) var(--ease)}
.category-card:hover .category-icon{background:var(--card-color);color:#fff;transform:scale(1.1)}
.category-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.category-name{font-size:15px;font-weight:700;color:var(--c-text);line-height:1.3}
.category-desc{font-size:12px;color:var(--c-text2);line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.category-arrow{font-size:18px;color:var(--c-text3);flex-shrink:0;transition:all var(--dur) var(--ease)}
.category-card:hover .category-arrow{color:var(--card-color);transform:translateX(3px)}
@media(max-width:600px){.categories-grid{grid-template-columns:1fr;padding:8px 10px 24px}}

/* === APP 下载页 === */
.app-page{max-width:680px;margin:0 auto;padding:0 16px 32px}
.app-hero{text-align:center;padding:40px 20px 32px;background:var(--c-surface);border-radius:var(--radius-lg);border:1px solid var(--c-border);margin-bottom:24px}
.app-hero-inner{display:flex;align-items:center;justify-content:center;gap:40px;max-width:700px;margin:0 auto}
.app-hero-left{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center}
.app-hero-right{flex-shrink:0;display:none}
@media(min-width:640px){.app-hero-right{display:block}}
.app-icon-wrap{margin-bottom:16px}
.app-icon-large{display:inline-flex;width:88px;height:88px;border-radius:22px;background:linear-gradient(135deg,#ef4444,#f97316);align-items:center;justify-content:center;font-size:44px;box-shadow:0 8px 32px rgba(239,68,68,.3)}
.app-title{font-size:28px;font-weight:800;color:var(--c-text);margin:0 0 6px;letter-spacing:-0.03em}
.app-subtitle{font-size:15px;color:var(--c-text2);margin:0 0 20px}
.app-version-info{display:flex;justify-content:center;gap:10px;margin-bottom:24px;flex-wrap:wrap}
.app-version-badge,.app-size-badge,.app-date-badge{display:inline-block;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:600}
.app-version-badge{background:var(--c-primary);color:#fff}
.app-size-badge{background:#fef3c7;color:#92400e}
.app-date-badge{background:var(--c-surface2);color:var(--c-text2)}
.app-download-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 40px;border-radius:14px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;font-size:17px;font-weight:700;text-decoration:none;transition:all var(--dur) var(--ease);box-shadow:0 4px 20px rgba(99,102,241,.35)}
.app-download-btn:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(99,102,241,.5);color:#fff}
.app-note{font-size:12px;color:var(--c-text3);margin:16px 0 0}
.app-empty-state{padding:32px;color:var(--c-text3);font-size:16px}
.app-features h2,.app-history h2{font-size:20px;font-weight:700;color:var(--c-text);margin:0 0 16px}
.app-feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-bottom:28px}
.app-feature-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);padding:20px;transition:all var(--dur) var(--ease)}
.app-feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}
.af-icon{font-size:28px;display:block;margin-bottom:10px}
.app-feature-card strong{display:block;font-size:14px;color:var(--c-text);margin-bottom:4px}
.app-feature-card p{font-size:12px;color:var(--c-text2);line-height:1.5;margin:0}
.app-history{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:24px}
.app-timeline{padding-left:0}
.app-timeline-item{display:flex;gap:14px;padding:10px 0;border-bottom:1px solid var(--c-border-l)}
.app-timeline-item:last-child{border-bottom:none}
.ati-dot{width:10px;height:10px;border-radius:50%;background:var(--c-primary);flex-shrink:0;margin-top:6px}
.ati-content{flex:1;min-width:0}
.ati-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}
.ati-header strong{font-size:14px;color:var(--c-text)}
.ati-date{font-size:12px;color:var(--c-text3)}
.ati-log{font-size:13px;color:var(--c-text2);line-height:1.5;margin:4px 0 0}
.app-qr-wrap{display:flex;flex-direction:column;align-items:center;gap:10px;padding:16px;background:var(--c-bg);border-radius:var(--radius);border:2px dashed var(--c-border)}
.app-qr-img{display:block;border-radius:8px;box-shadow:var(--shadow-md)}
.app-qr-tip{font-size:12px;color:var(--c-text2);margin:0;font-weight:500}
@media(max-width:639px){.app-hero-inner{flex-direction:column}}
@media(max-width:600px){.app-hero{padding:28px 14px}.app-download-btn{padding:12px 28px;font-size:15px}.app-feature-grid{grid-template-columns:1fr}}

/* === AI 摘要卡片 === */
.post-ai-summary{font-size:13px;line-height:1.55;color:var(--c-text2);background:linear-gradient(135deg,rgba(99,102,241,.06),rgba(6,182,212,.04));border-left:3px solid var(--c-primary);padding:8px 12px;margin:6px 0 10px;border-radius:0 8px 8px 0;max-width:100%}

/* === 侧边栏实时热榜（双轨制） === */
.widget-trending .trending-item{display:flex;align-items:flex-start;gap:8px;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--text);transition:all .15s;margin-bottom:2px}
.widget-trending .trending-item:hover{background:var(--surface-hover)}
.widget-trending .trending-item.matched{border-left:2px solid #6366f1;background:rgba(99,102,241,.04)}
.widget-trending .trending-item.matched:hover{background:rgba(99,102,241,.08)}
.widget-trending .trending-item.trending-only{border-left:2px solid #ef4444}
.widget-trending .trending-item.trending-only:hover{background:rgba(239,68,68,.04)}
.widget-trending .trending-rank{font-size:13px;flex-shrink:0;width:20px;text-align:center;line-height:1.4}
.widget-trending .trending-content{flex:1;min-width:0}
.widget-trending .trending-name{font-size:13px;font-weight:600;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.widget-trending .trending-meta{display:flex;align-items:center;gap:6px;margin-top:3px}
.widget-trending .trending-platform-tag{font-size:10px;font-weight:600;padding:1px 6px;border-radius:8px;color:var(--text-muted);background:var(--surface)}
.widget-trending .trending-count{font-size:11px;color:var(--text-muted)}
.widget-trending .trending-hot{font-size:11px;color:#ef4444;font-weight:600}