/* ============================================
   devgo.cn 全站样式 v5(重写,零碎片)
   设计系统:解析君绿色 + 深色 hero
   字体一致性:正文 .95rem/1.8 | 卡片标题 .92rem | 摘要 .78rem | 辅助 .72rem
   颜色一致性:主文字 #0F1419 | 次要 #4B5563 | 提示 #6B7280 | 强调 #059669
   ============================================ */

:root{
  /* 主色 */
  --accent:#10B981; --accent-dim:#047857;
  /* 背景 */
  --bg:#F9F9FB; --card:#fff; --nav-bg:#0e1422; --hero-bg:#0a1020;
  /* 文字三级 */
  --text:#0F1419; --text-2:#4B5563; --text-3:#6B7280;
  /* 边框/圆角 */
  --border:#E5E5E8; --radius:14px;
  /* 字号规范 */
  --fs-title:2.4rem; --fs-h1:1.7rem; --fs-h2:1.2rem; --fs-h3:1.05rem;
  --fs-body:.95rem; --fs-card-title:.92rem; --fs-card-desc:.78rem;
  --fs-small:.72rem;
}

/* ==================== Reset & 基础 ==================== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent-dim);text-decoration:none;transition:color .15s}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.container{max-width:860px;margin:0 auto;padding:0 24px}

/* ==================== 顶栏 ==================== */
.topbar{background:linear-gradient(180deg,#1a2238 0%,var(--nav-bg) 100%);position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(255,255,255,.06)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:52px;max-width:860px;margin:0 auto;padding:0 24px}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:.92rem;font-weight:700;color:#fff}
.topbar-brand img{width:28px;height:28px;border-radius:6px}
.topbar-nav{display:flex;gap:2px}
.topbar-nav a{padding:6px 14px;border-radius:6px;font-size:.84rem;color:rgba(255,255,255,.72);transition:all .15s;font-weight:500}
.topbar-nav a:hover{color:#fff;background:rgba(255,255,255,.08);text-decoration:none}
.topbar-nav a.active{color:#fff;background:rgba(16,185,129,.20);text-decoration:none}

/* ==================== Hero ==================== */
.hero{position:relative;background:var(--hero-bg);color:#fff;padding:36px 0 28px;overflow:hidden;border-bottom:1px solid rgba(16,185,129,.18)}
.fx-wrap{position:absolute;top:0;left:0;width:100%;height:100%;overflow:hidden;z-index:0;pointer-events:none;background:var(--hero-bg)}
.fx-wrap iframe{width:100%;height:100%;border:0}
.hero-inner{position:relative;text-align:center;max-width:680px;margin:0 auto;padding:0 24px;z-index:1}
.hero-eyebrow{display:inline-block;font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;padding:5px 14px;border-radius:999px;border:1px solid rgba(16,185,129,.5);color:#34D399;background:rgba(16,185,129,.12);margin-bottom:12px}
.hero h1{font-size:var(--fs-title);font-weight:800;line-height:1.2;margin-bottom:10px;background:linear-gradient(135deg,#fff 0%,#a7f3d0 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .hl{background:linear-gradient(135deg,#10B981 0%,#3B82F6 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:1rem;color:rgba(255,255,255,.78);margin-bottom:20px}

/* ==================== 搜索条(通用浅色,hero 内覆盖深色) ==================== */
.search-section{padding:32px 0 20px;text-align:center}
.search-box{display:flex;max-width:520px;margin:0 auto;border:2px solid var(--border);border-radius:14px;overflow:hidden;background:#fff;transition:border-color .2s,box-shadow .2s}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(16,185,129,.12)}
.search-box input{flex:1;border:none;outline:none;padding:12px 16px;font-size:.92rem;background:transparent;color:var(--text)}
.search-box input::placeholder{color:var(--text-3)}
.search-box button{background:linear-gradient(180deg,#10B981 0%,#047857 100%);color:#fff;border:none;padding:12px 24px;font-size:.88rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:opacity .15s}
.search-box button:hover{opacity:.92}
.hero .search-box{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);backdrop-filter:blur(8px)}
.hero .search-box:focus-within{border-color:#10B981;box-shadow:0 0 0 4px rgba(16,185,129,.16);background:rgba(255,255,255,.07)}
.hero .search-box input{color:#fff}
.hero .search-box input::placeholder{color:rgba(255,255,255,.55)}
@media(max-width:768px){.search-box button{padding:12px 16px;font-size:.82rem}}

/* ==================== 三入口 ==================== */
.entry-row{display:flex;justify-content:center;gap:40px;margin:24px 0 32px}
.entry-item{text-align:center;color:var(--text-2);text-decoration:none;transition:color .15s;padding:8px 12px}
.entry-item.active h3{color:var(--accent-dim)}
.entry-item.active{font-weight:600}

/* ==================== 工具栏目分区导航(纯文字横排) ==================== */
.tool-nav{display:flex;justify-content:center;gap:0;padding:16px 0 8px;border-bottom:1px solid var(--border);margin-bottom:8px}
.tool-nav a{font-size:.92rem;font-weight:600;color:var(--text-2);text-decoration:none;padding:8px 28px;transition:color .15s}
.tool-nav a + a{border-left:1px solid var(--border)}
.tool-nav a:hover{color:var(--text)}
.tool-nav a.active{color:var(--accent-dim)}
.entry-item:hover{color:var(--text);text-decoration:none}
.entry-item h3{font-size:.95rem;font-weight:600;color:var(--text);margin:0 0 2px}
.entry-item p{font-size:var(--fs-card-desc);color:var(--text-3);margin:0}
.entry-item:hover h3{color:var(--accent-dim)}


/* ==================== 面包屑 ==================== */
.breadcrumb{font-size:.82rem;color:var(--text-3);margin:8px 0 4px}
.breadcrumb a{color:var(--text-2)}.breadcrumb a:hover{color:var(--accent-dim)}

/* ==================== 卡片(普通,首页) ==================== */
.card{background:var(--card);border-radius:10px;overflow:hidden;box-shadow:rgba(50,50,93,.18) 0 6px 18px -3px,rgba(0,0,0,.06) 0 3px 10px -5px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:rgba(50,50,93,.25) 0 12px 28px -5px,rgba(0,0,0,.10) 0 5px 14px -7px}
.card-img{width:100%;height:120px;object-fit:cover;background:#eef1f5}
.card-body{padding:14px 16px}
.card .tag{display:inline-block;font-size:.68rem;font-weight:600;letter-spacing:.04em;padding:2px 8px;border-radius:999px;background:#DCFCE7;color:#047857;margin-bottom:8px}
.card-body h3{font-size:var(--fs-card-title);font-weight:700;margin:0 0 4px;color:var(--text);line-height:1.35}
.card-body p{font-size:var(--fs-card-desc);color:var(--text-2);margin:0;line-height:1.5}
.card-body .meta{font-size:var(--fs-small);color:var(--text-3);padding-top:6px;border-top:1px solid #f0f0f0}
a.card{color:inherit;text-decoration:none;display:block}
a.card:hover{text-decoration:none}

/* ==================== 堆叠卡片(文档/资料/工具列表) ==================== */
/* ==================== 双列叠卡(列表页,向下滚动) ==================== */
.stack-wrap{--tilt-angle:1.5deg;font-size:0;max-width:880px;margin:0 auto}
.stack-col{display:inline-block;width:48%;vertical-align:top;font-size:16px}
.stack-col:first-child{margin-right:4%}
.stack-card{position:sticky;top:calc(var(--top) * 1px);background:#fff;border-radius:10px;overflow:hidden;margin-bottom:16px;box-shadow:rgba(50,50,93,.20) 0 8px 20px -4px,rgba(0,0,0,.08) 0 4px 10px -6px;z-index:1;transition:box-shadow .3s ease}
.stack-card:hover{z-index:10;box-shadow:rgba(50,50,93,.28) 0 14px 32px -6px,rgba(0,0,0,.12) 0 6px 18px -8px}
.stack-card::before{content:'';position:absolute;inset:-1px -3px;background:rgba(255,255,255,.85);border-radius:12px;transform:rotate(calc(var(--tilt-angle) * (2 * (var(--r) - .8))));z-index:-1;box-shadow:0 2px 6px rgba(0,0,0,.04);transition:transform .3s ease,opacity .2s ease}
.stack-card:hover::before{transform:rotate(0deg);opacity:0}
.stack-col .stack-card:nth-child(6n){--r:.7;--top:4}
.stack-col .stack-card:nth-child(6n+1){--r:.2;--top:8}
.stack-col .stack-card:nth-child(6n+2){--r:.85;--top:12}
.stack-col .stack-card:nth-child(6n+3){--r:.4;--top:16}
.stack-col .stack-card:nth-child(6n+4){--r:.65;--top:20}
.stack-col .stack-card:nth-child(6n+5){--r:.5;--top:24}
.stack-card-img{width:100%;height:120px;object-fit:cover;background:#eef1f5;display:block}
.stack-card-body{padding:12px 14px 14px}
.stack-card .tag{display:inline-block;font-size:.66rem;font-weight:600;letter-spacing:.04em;padding:2px 8px;border-radius:999px;background:#DCFCE7;color:#047857;margin-bottom:6px}
.stack-card-body h3{font-size:.88rem;font-weight:700;margin:0 0 4px;color:var(--text);line-height:1.35}
.stack-card-body p{font-size:.76rem;color:var(--text-2);margin:0;line-height:1.5}
.stack-card-body .meta{font-size:var(--fs-small);color:var(--text-3);padding-top:6px;border-top:1px solid #f0f0f0}
a.stack-card{color:inherit;text-decoration:none;display:block}
a.stack-card:hover{text-decoration:none}

/* ==================== 分页导航 ==================== */
.pagination{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:28px 0 8px;font-size:.85rem}
.pagination .pg-num{min-width:34px;height:34px;line-height:34px;text-align:center;padding:0 8px;border:1px solid var(--border);border-radius:8px;color:var(--text-2);background:#fff}
.pagination .pg-cur{background:var(--accent-dim);color:#fff;border-color:var(--accent-dim);font-weight:700}
.pagination .pg-link{padding:0 14px;height:34px;line-height:34px;border:1px solid var(--border);border-radius:8px;color:var(--text-2);background:#fff}
.pagination a:hover{color:var(--accent-dim);border-color:var(--accent-dim);text-decoration:none}
.pagination .pg-ellipsis{color:var(--text-3);padding:0 2px}
.empty-tip{text-align:center;color:var(--text-3);padding:48px 0;font-size:.9rem}
.scroll-sentinel{text-align:center;color:var(--text-3);padding:18px 0 36px;font-size:.82rem}
.scroll-end{text-align:center;color:var(--text-3);padding:18px 0 36px;font-size:.82rem}

/* ==================== 工具分类 Tab ==================== */
.tool-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.tool-tab{padding:8px 18px;border:1px solid var(--border);border-radius:999px;background:#fff;font-size:.84rem;color:var(--text-2);cursor:pointer;transition:all .15s}
.tool-tab:hover{border-color:var(--accent);color:var(--accent-dim)}
.tool-tab.active{background:var(--accent-dim);border-color:var(--accent-dim);color:#fff;font-weight:600}

/* ==================== 工具栏目分区导航(首页) ==================== */
.sec-intro{font-size:.88rem;color:var(--text-2);margin:0 0 20px}

/* ==================== 网格 & 区块标题 ==================== */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.section-head{border-top:1px solid var(--border);margin:32px 0 20px;padding-top:28px}
.section-head h1{font-size:1.15rem;font-weight:700;margin-bottom:4px}
.section-head h2{font-size:1.15rem;font-weight:700;margin-bottom:4px}

/* ==================== 统计条 ==================== */
.stats-bar{display:flex;gap:28px;list-style:none;margin:0 0 22px;padding:14px 20px;background:#fff;border:1px solid var(--border);border-radius:12px;font-size:.88rem;color:var(--text-2)}
.stats-bar strong{color:var(--accent-dim);font-size:1.05rem}

/* ==================== 页脚 ==================== */
.footer{background:#fff;border-top:1px solid var(--border);margin-top:56px;padding:28px 0;text-align:center;font-size:.8rem;color:var(--text-3)}
.footer a{color:var(--text-2)}.footer a:hover{color:var(--accent-dim)}

/* ==================== 文章详情 ==================== */
.article{max-width:720px;margin:0 auto;padding:32px 0}
.article .breadcrumb{font-size:.82rem;color:var(--text-3);margin-bottom:20px}
.article .breadcrumb a{color:var(--text-2)}
.article h1{font-size:var(--fs-h1);font-weight:800;line-height:1.35;margin-bottom:12px;color:var(--text)}
.article .art-meta{display:flex;gap:16px;align-items:center;font-size:.82rem;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.article .art-tag{font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:999px;background:#DCFCE7;color:#047857}
.article .art-cover{width:100%;height:300px;object-fit:cover;border-radius:10px;margin-bottom:20px;background:#eef1f5}
.article .art-body{font-size:var(--fs-body);line-height:1.8;color:var(--text)}
.article .art-body h2{font-size:var(--fs-h2);font-weight:700;margin:32px 0 12px}
.article .art-body h3{font-size:var(--fs-h3);font-weight:700;margin:24px 0 8px}
.article .art-body p{margin:0 0 14px}
.article .art-body ul,.article .art-body ol{padding-left:20px;margin:0 0 14px}
.article .art-body li{margin-bottom:6px}
.article .art-body pre{background:#f6f8fa;padding:16px;border-radius:8px;overflow-x:auto;font-size:.84rem;line-height:1.55}
.article .art-body code{background:#f6f8fa;padding:2px 6px;border-radius:4px;font-size:.85em}
.article .art-body blockquote{border-left:3px solid var(--accent);padding:8px 16px;margin:0 0 14px;color:var(--text-2);font-style:italic;background:rgba(16,185,129,.04);border-radius:0 6px 6px 0}
.article .art-body table{width:100%;border-collapse:collapse;margin:0 0 14px}
.article .art-body th,.article .art-body td{padding:8px 12px;border:1px solid var(--border);text-align:left;font-size:.88rem}
.article .art-body th{background:#f6f8fa;font-weight:600}
.article .art-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:32px;padding-top:20px;border-top:1px solid var(--border)}
.article .art-tags a{font-size:.78rem;color:var(--text-2);padding:4px 12px;border:1px solid var(--border);border-radius:999px}
.article .art-tags a:hover{background:var(--accent-dim);color:#fff;border-color:var(--accent-dim);text-decoration:none}
.article .art-nav{display:flex;gap:24px;justify-content:space-between;margin-top:32px;padding-top:20px;border-top:1px solid var(--border);font-size:.85rem}
.article .art-nav a{color:var(--text-2)}.article .art-nav a:hover{color:var(--accent-dim)}

/* ==================== 响应式 ==================== */
@media(max-width:768px){
  .grid{grid-template-columns:1fr}
  .entry-row{gap:32px}
  .topbar-nav{overflow-x:auto;gap:1px;white-space:nowrap}
  .hero h1{font-size:1.8rem}
  .hero{padding:36px 0 28px}
  .article h1{font-size:1.4rem}
  .article .art-cover{height:180px}
}