/* ===== TechPulse 科技脉搏 — 设计系统 ===== */
/* 跨文档平滑过渡（Chrome/Edge 111+）：页面切换期间旧页面保持显示直至新页面就绪，
   从机制上消除整页跳转时的白屏闪烁；不支持该特性的浏览器自动忽略此规则 */
@view-transition{ navigation:auto }
:root{
  --bg:#070b14;
  --bg-2:#0b1120;
  --card:#101a30;
  --card-2:#0e1628;
  --border:rgba(148,163,255,.14);
  --border-2:rgba(148,163,255,.28);
  --text:#e6edf7;
  --text-2:#93a3bd;
  --text-3:#5c6b85;
  --cyan:#22d3ee;
  --violet:#a78bfa;
  --blue:#60a5fa;
  --green:#34d399;
  --amber:#fbbf24;
  --red:#f87171;
  --grad:linear-gradient(120deg,#22d3ee 0%,#60a5fa 45%,#a78bfa 100%);
  --radius:16px;
  --shadow:0 10px 40px rgba(2,8,25,.55);
  --maxw:1180px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono","Cascadia Code",Consolas,"Courier New",monospace;
  color-scheme:dark;
}
/* 深色主题：让浏览器在 CSS 加载前/页面切换时使用深色画布，消除整页跳转时的白屏闪烁 */
html{color-scheme:dark;background:var(--bg)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.65;-webkit-font-smoothing:antialiased}
/* 页面切换淡入：消除导航跳转时的白闪，营造平滑过渡 */
body{animation:pageFade .28s ease both}
@keyframes pageFade{from{opacity:0}to{opacity:1}}
/* 跨文档 View Transition 过渡细节：旧页快速淡出、新页淡入，全程保持深色画布 */
@media (prefers-reduced-motion:no-preference){
  ::view-transition-old(root){animation:vtOut .18s ease both}
  ::view-transition-new(root){animation:vtIn .30s ease both}
  @keyframes vtOut{from{opacity:1}to{opacity:0}}
  @keyframes vtIn{from{opacity:0}to{opacity:1}}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body{animation:none}
  ::view-transition-old(root),::view-transition-new(root){animation:none}
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
::selection{background:rgba(34,211,238,.28)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#1d2c4d;border-radius:6px}
::-webkit-scrollbar-track{background:var(--bg)}

/* 背景光晕 */
.glow{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.glow::before,.glow::after{content:"";position:absolute;border-radius:50%;filter:blur(120px);opacity:.16}
.glow::before{width:560px;height:560px;background:#0ea5e9;top:-160px;left:-120px}
.glow::after{width:520px;height:520px;background:#7c3aed;bottom:-180px;right:-100px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ===== 顶栏 ===== */
header.site{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(7,11,20,.78);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.3px}
.brand .logo{width:30px;height:30px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#04101c;font-size:16px;box-shadow:0 4px 18px rgba(34,211,238,.4)}
.brand small{color:var(--text-3);font-weight:500;font-size:12px}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{padding:8px 14px;border-radius:10px;color:var(--text-2);font-size:14.5px;font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--text);background:rgba(148,163,255,.1)}
.nav-links a.on{color:var(--cyan);background:rgba(34,211,238,.09)}
.nav-cta{background:var(--grad);color:#04101c !important;font-weight:700;box-shadow:0 4px 16px rgba(34,211,238,.3)}
.nav-cta:hover{background:var(--grad);transform:translateY(-1px)}
.menu-btn{display:none;background:none;border:1px solid var(--border);color:var(--text);border-radius:9px;padding:6px 10px;font-size:18px;cursor:pointer}
@media(max-width:860px){
  .menu-btn{display:block}
  .nav-links{position:fixed;top:64px;left:0;right:0;background:var(--bg-2);flex-direction:column;padding:12px;gap:2px;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
}

/* ===== Hero ===== */
.hero{padding:48px 0 34px;text-align:center}
.hero .tag{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border-2);color:var(--cyan);background:rgba(34,211,238,.07);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.5px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.14;font-weight:800;letter-spacing:-.5px}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{max-width:680px;margin:16px auto 0;color:var(--text-2);font-size:16.5px}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:26px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:12px;font-weight:700;font-size:15px;transition:.2s;border:1px solid transparent}
.btn-p{background:var(--grad);color:#04101c;box-shadow:0 6px 24px rgba(34,211,238,.32)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(96,165,250,.4)}
.btn-s{border-color:var(--border-2);color:var(--text)}
.btn-s:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}

/* ===== 区块通用 ===== */
section{padding:52px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:26px;gap:16px}
.sec-head h2{font-size:26px;font-weight:800;letter-spacing:-.3px}
.sec-head h2 em{font-style:normal;color:var(--cyan)}
.sec-head p{color:var(--text-3);font-size:14px}
.sec-more{color:var(--cyan);font-size:14px;font-weight:600;white-space:nowrap}
.sec-more:hover{text-decoration:underline}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1024px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* ===== 卡片 ===== */
.card{background:linear-gradient(180deg,var(--card) 0%,var(--card-2) 100%);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:.25s;position:relative;overflow:hidden;display:block}
.card:hover{transform:translateY(-4px);border-color:var(--border-2);box-shadow:var(--shadow)}
.card .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;margin-bottom:16px;background:rgba(34,211,238,.09);border:1px solid var(--border)}
.card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.card p{color:var(--text-2);font-size:13.8px}
.card .meta{display:flex;align-items:center;gap:12px;margin-top:14px;color:var(--text-3);font-size:12.5px}
.card .tag-x{font-size:11.5px;padding:3px 9px;border-radius:999px;border:1px solid var(--border-2);color:var(--cyan)}
.ic-cyan{background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.25)}
.ic-violet{background:rgba(167,139,250,.1);border-color:rgba(167,139,250,.25)}
.ic-blue{background:rgba(96,165,250,.1);border-color:rgba(96,165,250,.25)}
.ic-green{background:rgba(52,211,153,.1);border-color:rgba(52,211,153,.25)}
.ic-amber{background:rgba(251,191,36,.1);border-color:rgba(251,191,36,.25)}

/* ===== 页脚 ===== */
footer{border-top:1px solid var(--border);margin-top:40px;padding:40px 0 28px;background:var(--bg-2)}
.foot{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;align-items:center}
.foot .copy{color:var(--text-3);font-size:13px;text-align:center;line-height:1.8}
.foot .copy a{color:var(--cyan)}
.foot .copy a:hover{text-decoration:underline}
/* 页脚联系二维码 */
.qr-box{display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer}
.qr-box img{width:86px;height:86px;border-radius:10px;border:1px solid var(--border);background:#fff;padding:6px;transition:.2s}
.qr-box:hover img{border-color:var(--cyan);box-shadow:0 0 18px rgba(34,211,238,.25)}
.qr-box span{font-size:11.5px;color:var(--text-3);letter-spacing:.3px}

/* ===== 页面头部 ===== */
.page-head{padding:52px 0 12px}
.page-head h1{font-size:clamp(28px,4vw,42px);font-weight:800}
.page-head p{color:var(--text-2);margin-top:10px;max-width:640px}
.crumbs{color:var(--text-3);font-size:13px;margin-bottom:14px}
.crumbs a:hover{color:var(--cyan)}

/* ===== 工具 ===== */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.search{flex:1;min-width:240px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:11px 16px;color:var(--text);font-size:14px;outline:none;transition:.2s}
.search:focus{border-color:var(--cyan)}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.f-btn{background:var(--card);border:1px solid var(--border);color:var(--text-2);padding:8px 16px;border-radius:999px;font-size:13px;cursor:pointer;transition:.2s}
.f-btn:hover{color:var(--text);border-color:var(--border-2)}
.f-btn.on{background:rgba(34,211,238,.1);border-color:var(--cyan);color:var(--cyan)}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;cursor:pointer;transition:.22s;display:flex;flex-direction:column;gap:8px}
.tool-card:hover{border-color:var(--cyan);transform:translateY(-3px);box-shadow:0 8px 28px rgba(34,211,238,.12)}
.tool-card .t{font-weight:700;font-size:15px;display:flex;align-items:center;gap:9px}
.tool-card .d{color:var(--text-2);font-size:12.8px;flex:1}
.tool-card .cat{font-size:11px;color:var(--text-3);border:1px solid var(--border);padding:2px 8px;border-radius:999px;align-self:flex-start}

/* 弹窗 */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:flex-start;justify-content:center;background:rgba(4,8,18,.72);backdrop-filter:blur(6px);padding:40px 16px;overflow-y:auto}
.modal.open{display:flex}
.modal-box{background:var(--bg-2);border:1px solid var(--border-2);border-radius:18px;width:100%;max-width:720px;padding:26px;box-shadow:var(--shadow);animation:pop .25s ease}
@keyframes pop{from{transform:translateY(16px);opacity:0}to{transform:none;opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.modal-head h3{font-size:19px;font-weight:800}
.x{background:none;border:none;color:var(--text-3);font-size:24px;cursor:pointer;line-height:1}
.x:hover{color:var(--text)}
.tool-body{display:flex;flex-direction:column;gap:12px}
.tool-body label{font-size:13px;color:var(--text-2);font-weight:600}
.inp,textarea.inp{width:100%;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:10px 14px;color:var(--text);font-size:14px;font-family:var(--mono);outline:none;transition:.2s;resize:vertical}
.inp:focus{border-color:var(--cyan)}
textarea.inp{min-height:120px;line-height:1.5}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
@media(max-width:640px){.row2,.row3{grid-template-columns:1fr}}
.t-btn{background:var(--grad);border:none;color:#04101c;font-weight:700;padding:9px 18px;border-radius:10px;font-size:14px;cursor:pointer;transition:.2s}
.t-btn:hover{filter:brightness(1.12);transform:translateY(-1px)}
.t-btn.ghost{background:var(--card);color:var(--text);border:1px solid var(--border-2)}
.t-btn.ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.t-out{background:#0a1020;border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-family:var(--mono);font-size:13.2px;color:var(--green);min-height:44px;max-height:220px;overflow:auto;white-space:pre-wrap;word-break:break-all;display:none}
.t-out.show{display:block}
.chk{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);cursor:pointer}
.chk input{accent-color:var(--cyan);width:15px;height:15px}
.note{font-size:12.5px;color:var(--text-3)}

/* 博客（紧凑卡片 v7：缩略图更矮、文字截断，列表一页 6 篇） */
.post-card{display:flex;flex-direction:column;padding:16px 16px 14px}
.post-card .thumb{height:86px;border-radius:10px;margin-bottom:12px;background:var(--grad);opacity:.9;display:grid;place-items:center;font-size:28px}
.post-card h3{font-size:15.5px;line-height:1.42;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card p{flex:1;font-size:13.2px;line-height:1.62;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card .meta{gap:10px;margin-top:12px;font-size:12px}
/* 分页控件 */
.pager{display:flex;justify-content:center;align-items:center;gap:8px;flex-wrap:wrap;margin:30px 0 8px}
.pager button{background:var(--card);border:1px solid var(--border);color:var(--text-2);border-radius:10px;min-width:40px;height:40px;padding:0 13px;font-size:14px;font-family:inherit;cursor:pointer;transition:.2s}
.pager button:hover:not(:disabled):not(.on){border-color:var(--border-2);color:var(--cyan)}
.pager button.on{background:var(--grad);color:#04101c;font-weight:700;border-color:transparent;cursor:default}
.pager button:disabled{opacity:.3;cursor:default}
.article{max-width:760px;margin:0 auto;padding:8px 0 48px}
.article h1{font-size:30px;line-height:1.35;margin-bottom:14px}
.article .ameta{color:var(--text-3);font-size:13.5px;display:flex;gap:16px;flex-wrap:wrap;padding-bottom:22px;border-bottom:1px solid var(--border);margin-bottom:26px}
.article h2{font-size:22px;margin:34px 0 14px;padding-left:12px;border-left:4px solid var(--cyan)}
.article h3{font-size:17px;margin:22px 0 10px;color:var(--cyan)}
.article p,.article li{color:var(--text-2);font-size:15.5px;margin-bottom:12px}
.article ul,.article ol{padding-left:22px;margin-bottom:14px}
.article code{background:#0e1830;border:1px solid var(--border);border-radius:6px;padding:2px 7px;font-family:var(--mono);font-size:13px;color:var(--green)}
.article pre{background:#0a1020;border:1px solid var(--border);border-radius:12px;padding:16px;overflow-x:auto;margin:16px 0}
.article pre code{border:none;background:none;padding:0;font-size:13px}
.article blockquote{border-left:3px solid var(--violet);background:rgba(167,139,250,.06);padding:12px 16px;border-radius:0 10px 10px 0;color:var(--text-2);margin:16px 0}
.article table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.article th,.article td{border:1px solid var(--border);padding:9px 12px;text-align:left}
.article th{background:var(--card)}
.article .callout{border:1px solid rgba(34,211,238,.3);background:rgba(34,211,238,.06);border-radius:12px;padding:14px 18px;font-size:14px;color:var(--text-2);margin:18px 0}
.article .callout b{color:var(--cyan)}

/* 前沿 */
.trend{border-left:3px solid var(--border-2);padding:4px 0 4px 18px;margin-bottom:18px}
.trend .tv{color:var(--text-3);font-size:12px;font-family:var(--mono);display:block;margin-bottom:2px;letter-spacing:.5px}
.trend h3{font-size:16.5px;margin:3px 0 6px}
.trend h3 a:hover{color:var(--cyan)}
.trend p{color:var(--text-2);font-size:14px}
.tagline{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:700;margin-bottom:8px}
.tg-ai{background:rgba(34,211,238,.12);color:var(--cyan)}
.tg-chip{background:rgba(96,165,250,.12);color:var(--blue)}
.tg-space{background:rgba(167,139,250,.12);color:var(--violet)}
.tg-quantum{background:rgba(52,211,153,.12);color:var(--green)}
.tg-energy{background:rgba(251,191,36,.12);color:var(--amber)}

/* 404 */
.notfound{text-align:center;padding:110px 0}
.notfound .big{font-size:110px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.notfound h2{margin:14px 0 8px;font-size:26px}
.notfound p{color:var(--text-2);margin-bottom:26px}

/* 其他 */
.fade{animation:fade .5s ease}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.pill-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.pill{background:var(--card);border:1px solid var(--border);padding:7px 14px;border-radius:999px;font-size:12.5px;color:var(--text-2)}
.pill b{color:var(--cyan)}

/* ---- 转换进度条 ---- */
.prog{margin:12px 0 4px}
.prog-top{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text-2);margin-bottom:6px}
.prog-track{height:10px;border-radius:999px;background:rgba(148,163,255,.12);border:1px solid var(--border);overflow:hidden}
.prog-bar{height:100%;width:0;border-radius:999px;background:var(--grad);transition:width .35s ease;box-shadow:0 0 12px rgba(34,211,238,.45)}
/* ---- 二维码画布 ---- */
.qr-canvas-wrap{display:none;justify-content:center;align-items:center;background:#fff;padding:16px;border-radius:12px;border:1px solid var(--border);margin:10px 0 6px}
.qr-canvas-wrap.show{display:flex}
.qr-canvas-wrap canvas{max-width:100%;height:auto;image-rendering:pixelated}