/* ============================================
   SearchAI - 现代化搜索引擎样式
   ============================================ */

/* ===== 1. Reset & CSS Variables ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  /* 主色调 */
  --c-brand:#5b6af0;--c-brand2:#8b5cf6;--c-brand3:#a78bfa;
  --c-accent:#f59e0b;--c-accent2:#f97316;
  /* 中性色 */
  --c-text:#1a1a2e;--c-text2:#4a4a68;--c-text3:#9ca3af;
  --c-bg:#f0f2ff;--c-surface:#ffffff;--c-surface2:#f8f9fe;
  --c-border:#e2e4f0;--c-border2:#d4d7e5;
  /* 阴影 */
  --shadow-sm:0 1px 3px rgba(30,32,60,.06),0 1px 2px rgba(30,32,60,.04);
  --shadow-md:0 4px 16px rgba(30,32,60,.08),0 2px 6px rgba(30,32,60,.04);
  --shadow-lg:0 12px 40px rgba(30,32,60,.10),0 4px 12px rgba(30,32,60,.06);
  --shadow-xl:0 20px 60px rgba(30,32,60,.14),0 8px 20px rgba(30,32,60,.08);
  --shadow-glow:0 0 0 3px rgba(91,106,240,.12);
  /* 圆角 */
  --r-xs:6px;--r-sm:10px;--r-md:16px;--r-lg:24px;--r-xl:32px;--r-full:999px;
  /* 缓动 */
  --ease:cubic-bezier(.4,0,.2,1);
}

/* ===== 2. Global Base ===== */
html{scroll-behavior:smooth}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",
    "Microsoft YaHei","Helvetica Neue",sans-serif;
  color:var(--c-text);background:var(--c-bg);
  line-height:1.6;min-height:100vh;
  display:flex;flex-direction:column;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--c-brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--c-brand2)}

/* ===== 3. Video Background ===== */
.video-bg{position:fixed;inset:0;z-index:-2;overflow:hidden}
.video-bg video{width:100%;height:100%;object-fit:cover;border:none;outline:none;opacity:0;animation:videoFadeIn 1.2s ease .3s forwards}
.video-bg::after{content:'';position:absolute;inset:0;background:rgba(0,0,0,.35)}
@keyframes videoFadeIn{to{opacity:1}}

/* ===== 4. Background Decoration ===== */
.bg-decoration{position:fixed;inset:0;pointer-events:none;z-index:-1;overflow:hidden}
.bg-blob{
  position:absolute;border-radius:50%;filter:blur(80px);opacity:.4;
  animation:floatBlob 20s ease-in-out infinite;
}
.bg-blob:nth-child(1){
  width:500px;height:500px;top:-10%;left:-5%;animation-delay:0s;
  background:radial-gradient(circle,rgba(91,106,240,.18),transparent);
}
.bg-blob:nth-child(2){
  width:400px;height:400px;bottom:-8%;right:-3%;animation-delay:-7s;
  background:radial-gradient(circle,rgba(139,92,246,.15),transparent);
}
.bg-blob:nth-child(3){
  width:350px;height:350px;top:50%;left:50%;animation-delay:-14s;
  background:radial-gradient(circle,rgba(245,158,11,.10),transparent);
}

@keyframes floatBlob{
  0%,100%{transform:translate(0,0) scale(1)}
  25%{transform:translate(60px,-40px) scale(1.12)}
  50%{transform:translate(-30px,50px) scale(.92)}
  75%{transform:translate(-50px,-30px) scale(1.06)}
}

/* ===== 5. Header (首页导航) ===== */
.header{
  padding-top:10px;margin-left:10%;margin-right:10%;
  height:50px;line-height:50px;position:relative;z-index:10;
}
.header a{
  font-size:17px;color:#fff;margin-right:35px;
  transition:opacity .25s var(--ease);text-decoration:none;
}
.header a:hover{opacity:.75}
.icon{float:right;width:25px;vertical-align:middle;margin-top:5px}
.logon{float:right}

/* -- 搜索列表页/详情页 页眉共用基类 -- */
.search-page .header,
.detail-page .header{
  display:flex;align-items:center;
  padding:12px 28px;margin:0;height:auto;line-height:1.5;
  border-bottom:1px solid var(--c-border);background:var(--c-surface);
  position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
}
.search-page .header{justify-content:flex-start;padding-top:16px;padding-bottom:16px;gap:24px}
.detail-page .header{justify-content:space-between}

.search-page .header a,
.detail-page .header a{color:var(--c-text);font-size:13px;margin-right:0}
.search-page .header a:hover{color:var(--c-brand);opacity:1}

/* header 滚动阴影（JS 控制） */
.search-page .header.scrolled,
.detail-page .header.scrolled{box-shadow:0 2px 16px rgba(30,32,60,.08)}

/* Logo（列表/详情共用） */
.logo-small{font-size:26px;font-weight:800;flex-shrink:0}
.logo-small a{
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}

/* 详情页 header 左右分区 */
.header-left{display:flex;align-items:center;gap:24px}
.header-right{display:flex;align-items:center;gap:18px}
.header-right a{font-size:13px;color:var(--c-text2);font-weight:500}
.header-right a:hover{color:var(--c-brand)}

/* ===== 6. Utility & JS-driven Classes ===== */
/* 页面过渡（doSearch 触发） */
body.page-transitioning{opacity:0;transition:opacity .15s ease}

/* 搜索建议最大高度（JS 动态设置，这里定义默认） */
.search-suggestions{max-height:none}

/* 高亮文本 */
em.search-highlight{
  background:rgba(245,158,11,.2);color:#c2410c;
  font-style:normal;padding:0 2px;border-radius:2px;font-weight:600;
}

/* 结果URL箭头图标 */
.result-url-arrow{margin-left:4px;opacity:.6}

/* favicon 占位 */
.result-item .favicon{display:inline-block}

/* 分页"下一页"宽按钮 */
.page-btn-wide{width:auto!important;padding:0 20px!important;gap:6px}

/* 详情页辅助按钮间距 */
.btn-ml{margin-left:12px}

/* 相关搜索初始隐藏 */
.related-searches-hidden{display:none}

/* 广告文字链图标背景色 */
.ad-icon-purple{background:#eef2ff}
.ad-icon-green{background:#f0fdf4}
.ad-icon-orange{background:#fff7ed}

/* 入场动画延迟 — 1~4 */
.anim-delay-1{animation-delay:.1s}
.anim-delay-2{animation-delay:.2s}
.anim-delay-3{animation-delay:.3s}
.anim-delay-4{animation-delay:.4s}

/* 进度条初始 */
.reading-progress-init{width:0%}

/* ===== 7. Search Components ===== */
.search-box-wrapper{position:relative;width:100%;max-width:2363px;margin:0 auto}

/* 圆角搜索框（列表/详情页使用） */
.search-box{
  display:flex;align-items:center;width:100%;height:52px;padding:0 8px;
  background:var(--c-surface);border:1.5px solid var(--c-border);
  border-radius:var(--r-full);transition:all .3s var(--ease);position:relative;
  box-shadow:var(--shadow-sm);
}
.search-box:hover{border-color:var(--c-border2);box-shadow:var(--shadow-md)}
.search-box:focus-within{
  border-color:var(--c-brand);box-shadow:var(--shadow-glow),var(--shadow-md);
  transform:translateY(-1px);
}

.search-icon{
  width:20px;height:20px;color:var(--c-text3);flex-shrink:0;margin-left:8px;
  transition:color .3s var(--ease);
}
.search-box:focus-within .search-icon{color:var(--c-brand)}

.search-input{
  flex:1;height:100%;border:none;outline:none;font-size:16px;padding:0 12px;
  background:transparent;color:var(--c-text);
}
.search-input::placeholder{color:var(--c-text3)}

.search-clear{
  width:32px;height:32px;border:none;background:none;cursor:pointer;
  color:var(--c-text3);border-radius:50%;display:none;align-items:center;
  justify-content:center;flex-shrink:0;margin-right:4px;transition:all .2s var(--ease);
}
.search-clear:hover{background:var(--c-surface2);color:var(--c-text2)}
.search-clear.visible{display:flex}

.search-btn-group{display:flex;gap:12px;justify-content:center;margin-top:22px}

.btn{
  padding:11px 28px;border:1.5px solid transparent;border-radius:var(--r-full);
  font-size:14px;font-weight:500;cursor:pointer;transition:all .25s var(--ease);
  background:var(--c-surface);color:var(--c-text2);
  box-shadow:var(--shadow-sm);letter-spacing:.3px;
}
.btn:hover{box-shadow:var(--shadow-md);border-color:var(--c-border2);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}

.btn-primary{
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  color:#fff;border-color:transparent;box-shadow:0 4px 14px rgba(91,106,240,.35);
}
.btn-primary:hover{box-shadow:0 8px 24px rgba(91,106,240,.45);transform:translateY(-2px)}

/* 列表/详情页搜索框尺寸覆盖 */
.search-page .search-box-wrapper{max-width:1050px;margin:0}
.search-page .search-box{height:46px}

/* -- 搜索建议下拉 -- */
.search-suggestions{
  position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--c-surface);
  border-radius:var(--r-lg);box-shadow:var(--shadow-xl);overflow-y:auto;
  z-index:100;display:none;border:1px solid var(--c-border);
}
.search-suggestions.show{display:block;animation:slideDown .2s var(--ease)}

@keyframes slideDown{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:translateY(0)}
}

.suggestion-item{
  display:flex;align-items:center;gap:12px;padding:12px 18px;font-size:14px;
  cursor:pointer;transition:background .15s var(--ease);color:var(--c-text);
}
.suggestion-item:hover,.suggestion-item.active{
  background:var(--c-surface2);color:var(--c-brand);
}
.suggestion-item .sug-icon{color:var(--c-text3);transition:color .15s var(--ease)}
.suggestion-item:hover .sug-icon,.suggestion-item.active .sug-icon{color:var(--c-brand)}

/* ===== 8. Home Page ===== */
.home-page{display:flex;flex-direction:column;align-items:center;min-height:100vh;padding:0;background:transparent}

.home-main{
  display:flex;flex-direction:column;align-items:center;
  margin-left:10%;margin-right:10%;margin-top:clamp(60px,12vh,100px);
  padding-bottom:80px;position:relative;z-index:1;flex:1;
}

/* Logo */
.logo-img{margin-bottom:4px}
.logo-img img{width:200px}

/* 副标题 */
.home-subtitle{
  color:#fff;font-size:clamp(18px,2.5vw,30px);
  margin-top:-5px;margin-bottom:10px;text-align:center;font-weight:400;
}

/* 新版搜索框（矩形 + 蓝色按钮） */
.search-box-new{
  display:flex;align-items:stretch;width:100%;max-width:2363px;
  margin:30px auto 0;padding:0;background:#fff;border-radius:4px;
}
.search-box-new .search-input{
  flex:1;height:60px;font-size:15px;line-height:20px;
  color:#333;padding:20px;border:none;outline:none;background:#fff;
}
.search-box-new .search-input::placeholder{color:rgba(51,51,51,.3)}
.search-box-new .search-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:115px;height:60px;cursor:pointer;color:#fff;
  background-color:#108CEE;font-size:15px;font-weight:500;
  text-align:center;flex-shrink:0;transition:background .25s var(--ease);
}
.search-box-new .search-btn:hover{background-color:#0a7ad4}

/* 首页徽章 */
.home-badge{display:flex;align-items:center;gap:8px;margin-top:8px}
.home-badge-text{font-size:25px;color:#fff}
.home-badge-icon{vertical-align:middle}

/* ===== 9. Search List Page ===== */
.search-page{background:var(--c-surface)}

/* 分类 Tab */
.search-tabs{
  display:flex;gap:0;padding:0 28px;border-bottom:1px solid var(--c-border);
  background:var(--c-surface);max-width:1240px;margin:0 auto;width:100%;
}
.search-tab{
  padding:13px 20px;font-size:13px;font-weight:500;color:var(--c-text3);
  cursor:pointer;border-bottom:2.5px solid transparent;transition:all .25s var(--ease);
  display:flex;align-items:center;gap:6px;
}
.search-tab:hover{color:var(--c-brand);background:var(--c-surface2)}
.search-tab.active{color:var(--c-brand);border-bottom-color:var(--c-brand)}

/* 搜索结果统计 */
.result-info{
  padding:14px 28px;font-size:13px;color:var(--c-text3);
  background:var(--c-surface);max-width:1240px;margin:0 auto;width:100%;
}
.result-info strong{color:var(--c-text)}

/* 双栏布局 */
.list-layout{
  display:flex;gap:24px;padding:0 28px;max-width:1240px;
  margin:0 auto;align-items:flex-start;width:100%;
}
.list-main{flex:1;min-width:0}

/* 搜索结果卡片 */
.result-item{
  margin-bottom:6px;border-radius:var(--r-md);padding:20px 24px;
  background:var(--c-surface);transition:all .25s var(--ease);
  border:1.5px solid transparent;cursor:default;
}
.result-item:hover{
  border-color:var(--c-border);box-shadow:var(--shadow-md);
  transform:translateX(4px);background:var(--c-surface2);
}

.result-url{
  font-size:12px;color:var(--c-brand2);margin-bottom:4px;
  display:flex;align-items:center;gap:8px;font-weight:500;
}
.result-url .favicon{width:18px;height:18px;border-radius:4px}

.result-title{
  font-size:19px;color:var(--c-brand);margin-bottom:6px;display:block;
  line-height:1.35;font-weight:600;transition:color .2s var(--ease);
}
.result-title:hover{color:var(--c-brand2);text-decoration:underline}

.result-snippet{font-size:14px;color:var(--c-text2);line-height:1.65;margin-bottom:8px}
.result-date{margin-left:auto;color:var(--c-text3)}
.result-meta{display:flex;align-items:center;gap:14px;font-size:12px;color:var(--c-text3)}

.result-meta .category-badge{
  display:inline-flex;align-items:center;gap:5px;padding:3px 10px;
  border-radius:var(--r-full);font-weight:500;font-size:11px;
}

/* 空状态 */
.empty-state{text-align:center;padding:80px 20px;color:var(--c-text2)}
.empty-state .empty-icon{font-size:64px;margin-bottom:20px;opacity:.6}
.empty-state h3{font-size:20px;margin-bottom:8px}
.empty-state p{font-size:14px;color:var(--c-text3)}

/* 相关搜索 */
.related-searches{padding:24px 0 44px}
.related-searches h3{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--c-text)}
.related-tags{display:flex;flex-wrap:wrap;gap:10px}
.related-tag{
  padding:9px 20px;background:var(--c-surface);border-radius:var(--r-full);
  font-size:13px;font-weight:500;color:var(--c-text2);cursor:pointer;
  transition:all .25s var(--ease);border:1.5px solid var(--c-border);
  box-shadow:var(--shadow-sm);
}
.related-tag:hover{
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  color:#fff;border-color:transparent;transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(91,106,240,.3);text-decoration:none;
}

/* 分页 */
.pagination{display:flex;justify-content:center;gap:6px;padding:32px 0 60px}
.page-btn{
  width:42px;height:42px;border-radius:var(--r-full);border:1.5px solid var(--c-border);
  background:var(--c-surface);cursor:pointer;font-size:14px;font-weight:500;
  color:var(--c-text2);transition:all .2s var(--ease);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);
}
.page-btn:hover{border-color:var(--c-brand);color:var(--c-brand);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.page-btn.active{
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(91,106,240,.35);
}

/* ===== 10. Ad Sidebar ===== */
.ad-sidebar{
  width:300px;flex-shrink:0;display:flex;flex-direction:column;gap:16px;
  position:sticky;top:80px;
}

/* 通用标签 */
.ad-badge{
  position:absolute;top:10px;right:12px;font-size:11px;
  color:var(--c-text3);font-weight:500;letter-spacing:.5px;z-index:2;user-select:none;
}
.ad-badge-sm{font-size:10px;top:8px;right:10px;color:#adb5bd}

/* 通用卡片 */
.ad-card{
  background:var(--c-surface);border-radius:var(--r-md);border:1.5px solid var(--c-border);
  position:relative;overflow:hidden;transition:all .3s var(--ease);box-shadow:var(--shadow-sm);
}
.ad-card:hover{border-color:var(--c-border2);box-shadow:var(--shadow-md);transform:translateY(-2px)}

/* -- 精品推荐 -- */
.ad-card-primary{
  padding:24px 20px 20px;text-align:center;
  background:linear-gradient(180deg,var(--c-surface) 0%,#fafbff 100%);
}
.ad-card-primary .ad-badge{top:12px;right:14px}
.ad-card-primary .ad-card-glow{
  position:absolute;top:-40px;left:50%;transform:translateX(-50%);
  width:160px;height:60px;
  background:radial-gradient(ellipse,rgba(91,106,240,.12),transparent);pointer-events:none;
}

.ad-card-icon{
  width:60px;height:60px;margin:0 auto 14px;
  background:linear-gradient(135deg,rgba(91,106,240,.1),rgba(139,92,246,.1));
  border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;color:var(--c-brand);
}
.ad-card-title{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--c-text)}
.ad-card-desc{font-size:12px;color:var(--c-text2);line-height:1.6;margin-bottom:16px}

.ad-card-btn{
  display:inline-flex;align-items:center;gap:6px;padding:10px 24px;
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  color:#fff;border-radius:var(--r-full);font-size:13px;font-weight:600;
  transition:all .25s var(--ease);box-shadow:0 4px 14px rgba(91,106,240,.3);
}
.ad-card-btn:hover{
  box-shadow:0 8px 22px rgba(91,106,240,.45);color:#fff;
  text-decoration:none;transform:translateY(-1px);
}

/* -- 文字链广告 -- */
.ad-card-text{padding:16px 18px 12px}
.ad-text-links{display:flex;flex-direction:column;gap:0}
.ad-text-link{
  display:flex;align-items:center;gap:10px;padding:10px 0;
  border-bottom:1px solid var(--c-surface2);transition:all .2s var(--ease);text-decoration:none;
}
.ad-text-link:last-child{border-bottom:none}
.ad-text-link:hover{transform:translateX(4px)}

.ad-text-icon{
  width:36px;height:36px;border-radius:var(--r-sm);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.ad-text-body{display:flex;flex-direction:column;gap:2px}
.ad-text-body strong{font-size:13px;color:var(--c-text);font-weight:600;transition:color .2s var(--ease)}
.ad-text-body small{font-size:11px;color:var(--c-text3)}
.ad-text-link:hover .ad-text-body strong{color:var(--c-brand)}

/* -- Banner 广告 -- */
.ad-card-banner{
  padding:0;min-height:150px;border-color:transparent;
  background:linear-gradient(135deg,#1a1b2e 0%,#2d1b4e 50%,#1e1b4b 100%);
}
.ad-card-banner:hover{border-color:#3a3b5e}
.ad-card-banner .ad-badge{top:12px;right:14px}

.ad-banner-bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 70% 20%,rgba(139,92,246,.25),transparent 60%),
    radial-gradient(circle at 30% 80%,rgba(91,106,240,.15),transparent 50%);
}
.ad-banner-content{position:relative;z-index:1;padding:22px 20px;color:#fff}

.ad-banner-tag{
  display:inline-block;padding:3px 10px;background:rgba(245,158,11,.2);
  color:#fbbf24;border-radius:var(--r-full);font-size:11px;font-weight:600;
  letter-spacing:.5px;margin-bottom:12px;border:1px solid rgba(245,158,11,.3);
}
.ad-banner-content h4{font-size:18px;font-weight:700;margin-bottom:6px}
.ad-banner-content p{font-size:12px;color:rgba(255,255,255,.7);line-height:1.7;margin-bottom:14px}

.ad-card-btn-outline{
  background:rgba(255,255,255,.1);box-shadow:none;
  border:1px solid rgba(255,255,255,.25);color:#fff;font-size:12px;padding:8px 18px;
}
.ad-card-btn-outline:hover{
  background:rgba(255,255,255,.18);color:#fff;
  border-color:rgba(255,255,255,.4);box-shadow:0 4px 16px rgba(139,92,246,.3);
}

/* -- 小方块网格广告 -- */
.ad-card-mini{padding:14px 16px 10px}
.ad-mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ad-mini-item{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:12px 8px;border-radius:var(--r-sm);text-decoration:none;
  background:var(--c-surface2);transition:all .2s var(--ease);
  font-size:12px;font-weight:500;color:var(--c-text2);
}
.ad-mini-item:hover{
  background:var(--c-brand);color:#fff;text-decoration:none;
  box-shadow:0 4px 12px rgba(91,106,240,.25);transform:translateY(-2px);
}
.ad-mini-emoji{font-size:20px;transition:transform .2s var(--ease)}
.ad-mini-item:hover .ad-mini-emoji{transform:scale(1.2)}

/* ===== 11. Detail Page ===== */
.detail-page{background:var(--c-surface)}

/* 阅读进度条 */
.reading-progress{
  position:fixed;top:0;left:0;height:3px;z-index:100;
  background:linear-gradient(90deg,var(--c-brand),var(--c-brand2),var(--c-brand3));
  transition:width .15s ease-out;border-radius:0 2px 2px 0;
}

/* 正文容器 */
.detail-container{max-width:1240px;margin:0 auto;padding:32px 24px 80px}

/* 面包屑 */
.breadcrumb{
  font-size:13px;color:var(--c-text3);margin-bottom:24px;
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--c-text2);font-weight:500}
.breadcrumb a:hover{color:var(--c-brand)}
.breadcrumb .sep{color:var(--c-border2)}

/* 文章头部 */
.article-category{
  display:inline-block;padding:6px 16px;border-radius:var(--r-full);
  font-size:12px;font-weight:600;margin-bottom:16px;letter-spacing:.5px;
}
.cat-ai{background:#eef2ff;color:#6366f1}     .cat-web{background:#ecfeff;color:#06b6d4}
.cat-science{background:#ecfdf5;color:#10b981} .cat-tech{background:#fff7ed;color:#f59e0b}
.cat-space{background:#fef2f2;color:#ef4444}   .cat-health{background:#f0fdf4;color:#22c55e}
.cat-coding{background:#f5f3ff;color:#8b5cf6}  .cat-car{background:#f0fdfa;color:#14b8a6}

.article-title{
  font-size:36px;font-weight:800;line-height:1.25;margin-bottom:20px;
  color:var(--c-text);letter-spacing:-.5px;
}

.article-meta{
  display:flex;align-items:center;gap:18px;padding-bottom:24px;
  border-bottom:2px solid var(--c-surface2);margin-bottom:28px;
  font-size:13px;color:var(--c-text2);flex-wrap:wrap;
}
.article-author{display:flex;align-items:center;gap:10px}
.author-avatar{
  width:40px;height:40px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-brand),var(--c-brand2));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;box-shadow:0 4px 12px rgba(91,106,240,.25);
}
.author-info{display:flex;flex-direction:column}
.author-name{font-weight:600;color:var(--c-text);font-size:14px}
.author-date{font-size:12px;color:var(--c-text3)}

.article-stats{display:flex;align-items:center;gap:18px;margin-left:auto}
.stat-item{
  display:flex;align-items:center;gap:5px;font-size:13px;
  padding:5px 12px;background:var(--c-surface2);
  border-radius:var(--r-full);font-weight:500;
}

/* 文章正文 */
.article-content{font-size:17px;line-height:1.9;color:var(--c-text)}
.article-content h2{
  font-size:24px;margin:36px 0 16px;font-weight:700;color:var(--c-text);
  padding-left:16px;border-left:4px solid var(--c-brand);
}
.article-content h3{font-size:19px;margin:28px 0 12px;font-weight:600}
.article-content p{margin:14px 0}
.article-content ul,.article-content ol{padding-left:24px;margin:14px 0}
.article-content li{margin:8px 0}
.article-content li::marker{color:var(--c-brand)}
.article-content code{
  background:var(--c-surface2);padding:2px 8px;border-radius:4px;
  font-size:14px;color:#d63384;font-weight:500;
}
.article-content pre{
  background:#1a1b2e;color:#e4e4f0;padding:20px 24px;border-radius:var(--r-sm);
  overflow-x:auto;margin:20px 0;font-size:14px;line-height:1.6;
  border:1px solid #2a2b3e;position:relative;
}
.article-content pre::before{
  content:'code';position:absolute;top:8px;right:14px;
  font-size:10px;color:#666;text-transform:uppercase;letter-spacing:1px;
}
.article-content pre code{background:none;padding:0;color:inherit;font-size:inherit}
.article-content blockquote{
  border-left:4px solid var(--c-brand);padding:14px 20px;margin:20px 0;
  background:linear-gradient(135deg,var(--c-surface2),rgba(91,106,240,.03));
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-text2);
  font-style:italic;position:relative;
}
.article-content blockquote::before{
  content:'"';position:absolute;left:12px;top:-8px;
  font-size:40px;color:var(--c-brand);opacity:.15;font-family:Georgia,serif;
}

/* 目录侧边栏 */
.toc-sidebar{
  position:fixed;right:max(20px,calc((100vw - 900px)/2 - 220px));top:140px;
  width:200px;font-size:12px;z-index:10;display:none;
}
@media(min-width:1300px){.toc-sidebar{display:block}}
.toc-sidebar h4{
  font-size:13px;font-weight:700;margin-bottom:10px;color:var(--c-text);
  text-transform:uppercase;letter-spacing:.5px;
}
.toc-sidebar a{
  display:block;padding:5px 0;color:var(--c-text3);
  border-left:2px solid transparent;padding-left:12px;
  transition:all .2s var(--ease);font-weight:500;
}
.toc-sidebar a:hover,.toc-sidebar a.active{color:var(--c-brand);border-left-color:var(--c-brand)}

/* 文章底部 */
.article-footer{margin-top:48px;padding-top:24px;border-top:2px solid var(--c-surface2)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.article-tag{
  padding:6px 16px;background:var(--c-surface2);border-radius:var(--r-full);
  font-size:12px;font-weight:500;color:var(--c-text2);transition:all .2s var(--ease);
}
.article-tag:hover{background:var(--c-brand);color:#fff;text-decoration:none}

.article-actions{display:flex;gap:14px}
.action-btn{
  display:flex;align-items:center;gap:7px;padding:10px 20px;
  border:1.5px solid var(--c-border);border-radius:var(--r-full);
  background:var(--c-surface);cursor:pointer;font-size:13px;font-weight:500;
  color:var(--c-text2);transition:all .2s var(--ease);box-shadow:var(--shadow-sm);
}
.action-btn:hover{
  background:var(--c-surface2);border-color:var(--c-brand);
  color:var(--c-brand);transform:translateY(-1px);
}
.action-btn.liked{background:#fee2e2;border-color:#ef4444;color:#ef4444}
.action-btn.bookmarked{background:#eef2ff;border-color:var(--c-brand);color:var(--c-brand)}

/* 相关推荐 */
.related-articles{margin-top:52px}
.related-articles h3{
  font-size:20px;font-weight:700;margin-bottom:20px;color:var(--c-text);
  display:flex;align-items:center;gap:10px;
}
.related-articles h3::after{content:'';flex:1;height:1px;background:var(--c-border)}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.related-card{
  padding:18px 20px;border-radius:var(--r-md);border:1.5px solid var(--c-border);
  transition:all .25s var(--ease);background:var(--c-surface);
  display:flex;gap:14px;cursor:pointer;box-shadow:var(--shadow-sm);
}
.related-card:hover{border-color:var(--c-brand);box-shadow:var(--shadow-md);transform:translateY(-3px)}

.related-card-icon{
  width:44px;height:44px;border-radius:var(--r-sm);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:20px;
}
.related-card-info{flex:1;min-width:0}
.related-card-info h4{font-size:14px;font-weight:600;margin-bottom:4px;line-height:1.4}
.related-card-info h4 a{color:var(--c-text)}
.related-card-info h4 a:hover{color:var(--c-brand)}
.related-card-info p{font-size:12px;color:var(--c-text3)}

/* 404 */
.not-found{text-align:center;padding:100px 20px}
.not-found .nf-icon{font-size:80px;margin-bottom:24px;animation:bounce 2s ease-in-out infinite}
.not-found h2{font-size:26px;margin-bottom:12px;font-weight:700}
.not-found p{color:var(--c-text2);margin-bottom:28px}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ===== 12. Footer ===== */
/* 首页页脚：绝对定位，透明底白字 */
.footer{
  background:transparent;position:absolute;left:50px;right:50px;
  bottom:20px;z-index:10;
}
.footer a{text-decoration:none;margin-right:10px;color:#fff}
.footer a:hover{opacity:.75}
.copyright{float:right}

/* 搜索列表/详情页 — 页脚置于正常文档流 */
.search-page .footer, .detail-page .footer{
  position:static;background:var(--c-surface2);
  padding:24px 28px;margin-top:48px;text-align:center;
  border-top:1px solid var(--c-border);
}
.search-page .footer a, .detail-page .footer a{color:var(--c-text2);font-size:13px}
.search-page .footer a:hover, .detail-page .footer a:hover{color:var(--c-brand);opacity:1}
.search-page .copyright, .detail-page .copyright{float:right;color:var(--c-text3)}

/* ===== 13. Animations ===== */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:translateY(0)}
}
.animate-in{animation:fadeInUp .5s var(--ease) both}
.animate-in:nth-child(1){animation-delay:.05s}
.animate-in:nth-child(2){animation-delay:.1s}
.animate-in:nth-child(3){animation-delay:.15s}
.animate-in:nth-child(4){animation-delay:.2s}
.animate-in:nth-child(5){animation-delay:.25s}
.animate-in:nth-child(6){animation-delay:.3s}
.animate-in:nth-child(7){animation-delay:.35s}
.animate-in:nth-child(8){animation-delay:.4s}
.animate-in:nth-child(9){animation-delay:.45s}

/* ============================================
   14. Responsive Breakpoints
   ============================================ */

/* ---- 平板 (≤1024px) ---- */
@media(max-width:1024px){
  .header{margin-left:6%;margin-right:6%}
  .header a{margin-right:24px;font-size:16px}
  .home-main{margin-left:6%;margin-right:6%}
  .home-subtitle{font-size:24px}
  .home-badge-text{font-size:22px}
  .search-box-new{max-width:2025px}
  .footer{left:30px;right:30px}
  .search-page .footer, .detail-page .footer{padding:20px 24px;margin-top:40px}
  .ad-sidebar{width:260px}
  .detail-container{padding:24px 20px 60px}
}

/* ---- 小平板 / 手机横屏 (≤768px) ---- */
@media(max-width:768px){
  .home-page{padding:0;overflow-x:hidden}

  /* 页眉 */
  .header{
    margin-left:4%;margin-right:4%;height:auto;line-height:1.6;
    padding-top:10px;padding-bottom:8px;
    display:flex;flex-wrap:wrap;align-items:center;gap:6px 0;
  }
  .header a{margin-right:16px;font-size:14px;line-height:36px}
  .icon{float:none;width:22px;margin-top:0;margin-left:auto}
  .logon{float:none;line-height:36px;font-size:14px;margin-right:0}

  /* 主页 */
  .home-main{margin-left:4%;margin-right:4%;margin-top:40px;padding-bottom:70px}
  .logo-img img{width:150px}
  .home-subtitle{font-size:16px;margin-bottom:6px}
  .search-box-new{max-width:100%;margin-top:20px;padding:0 4%}
  .search-box-new .search-input{padding:15px 14px;font-size:14px;height:55px}
  .search-box-new .search-btn{width:80px;height:55px;font-size:13px}
  .home-badge-text{font-size:17px}

  /* 页脚 */
  .footer{left:16px;right:16px;bottom:14px;text-align:center}
  .footer a{font-size:11px;margin-right:8px;display:inline-block;line-height:1.8}
  .copyright{float:none;display:block;margin-top:4px}

  .search-page .footer, .detail-page .footer{padding:18px 16px;margin-top:32px}
  .search-page .copyright, .detail-page .copyright{float:none;display:block;margin-top:6px}

  /* 搜索列表页 */
  .search-page .header{flex-wrap:wrap;padding:10px 16px}
  .search-tabs{padding:0 12px;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .list-layout{padding:0 14px}
  .result-info{padding:12px 14px}
  .result-item{padding:16px 18px}
  .ad-sidebar{display:none}

  /* 详情页 */
  .detail-container{padding:20px 16px 60px}
  .article-title{font-size:26px}
  .article-content{font-size:16px}
  .header-right{display:none}

  /* 背景 */
  .bg-blob:nth-child(1){width:300px;height:300px}
  .bg-blob:nth-child(2){width:250px;height:250px}
  .bg-blob:nth-child(3){width:200px;height:200px}
  .related-grid{grid-template-columns:1fr}
}

/* ---- 小屏手机 (≤480px) ---- */
@media(max-width:480px){
  .header{margin-left:4%;margin-right:4%;padding-top:8px}
  .header a{margin-right:10px;font-size:13px}

  .home-main{margin-left:3%;margin-right:3%;margin-top:30px;padding-bottom:60px}
  .logo-img img{width:130px}
  .home-subtitle{font-size:13px}
  .search-box-new{margin-top:16px;flex-direction:row}
  .search-box-new .search-input{height:50px;padding:12px;font-size:13px}
  .search-box-new .search-btn{width:68px;height:50px;font-size:12px}
  .home-badge{justify-content:center;text-align:center}
  .home-badge-text{font-size:15px}

  .footer{left:12px;right:12px;bottom:10px}
  .footer a{font-size:10px;margin-right:6px;line-height:2}
  .search-page .footer, .detail-page .footer{padding:14px 12px;margin-top:24px}
  .search-page .copyright, .detail-page .copyright{float:none;display:block;margin-top:4px;font-size:11px}
  .search-page .footer a, .detail-page .footer a{font-size:11px;margin-right:6px}

  .result-item{padding:14px 16px}
  .search-tab{padding:10px 12px;font-size:12px}
  .article-title{font-size:22px}
  .breadcrumb{font-size:12px}
}

/* ---- 超小屏 (≤360px) ---- */
@media(max-width:360px){
  .header a{margin-right:8px;font-size:12px}
  .logon{font-size:12px}
  .logo-img img{width:110px}
  .home-subtitle{font-size:12px}
  .search-box-new .search-input{height:48px;font-size:12px;padding:10px}
  .search-box-new .search-btn{width:60px;height:48px;font-size:11px}
  .footer{left:10px;right:10px;bottom:8px}
  .footer a{font-size:10px;margin-right:4px}
  .search-page .footer, .detail-page .footer{padding:12px 8px;margin-top:20px}
  .search-page .copyright, .detail-page .copyright{float:none;display:block;margin-top:4px;font-size:10px}
  .search-page .footer a, .detail-page .footer a{font-size:10px;margin-right:4px}
}