:root{--bg:#eaf4fd;--fg:#1e2a3a;--mute:#6a7d92;--card:#ffffffcc;--side:#dbeafa;--line:#cfe3f4;--accent:#2b7de9;--accent2:#e1efff}
@media (prefers-color-scheme:dark){:root{--bg:#0e1824;--fg:#e3edf7;--mute:#92a8bd;--card:#162536cc;--side:#112030;--line:#25384c;--accent:#5aa5ff;--accent2:#1c3249}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.5 -apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}

/* 顶栏 */
.top{position:sticky;top:0;z-index:20;height:56px;display:flex;align-items:center;gap:16px;padding:0 20px;background:var(--side);border-bottom:1px solid var(--line)}
.logo{font-weight:700;font-size:17px;white-space:nowrap;width:184px}
#q{flex:1;max-width:520px;padding:8px 16px;border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--fg);font:inherit;outline:none}
#q:focus{border-color:var(--accent)}
.toplink{margin-left:auto;padding:5px 14px;border-radius:999px;background:var(--accent);color:#fff;font-size:13px;white-space:nowrap}

/* 左侧导航 */
.shell{display:flex;align-items:flex-start}
.side{position:sticky;top:56px;width:204px;flex:none;height:calc(100vh - 56px);overflow-y:auto;background:var(--side);border-right:1px solid var(--line);padding:10px 10px 24px}
.side nav{display:flex;flex-direction:column;gap:1px}
.side a{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:8px;font-size:14px}
.side a span{width:20px;text-align:center}
.side a:hover{background:var(--accent2)}
.side a.on{background:var(--accent);color:#fff;font-weight:600}
.side a em{margin-left:auto;font-style:normal;font-size:11px;background:#ff6b6b;color:#fff;border-radius:999px;padding:0 6px}
.sep{margin:12px 12px 4px;font-size:12px;color:var(--mute)}

/* 主区域 */
.main{flex:1;min-width:0;padding:16px 24px 0}
.hero{padding:6px 0 12px}.hero h1{margin:0 0 4px;font-size:22px}.hero p{margin:0;color:var(--mute)}

/* 资讯: 顶部紧凑两列列表 */
.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px 16px 10px;margin-bottom:8px}
.ph{display:flex;justify-content:space-between;align-items:center;padding:8px 0 2px}
.ph h2{margin:0;font-size:16px}.ph a{color:var(--accent);font-size:13px}
.nlist{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}
.nrow{display:flex;align-items:center;gap:12px;padding:8px 8px;margin:0 -8px;border-radius:8px}
a.nrow:hover{background:var(--accent2)}
.nrow time{flex:none;color:var(--mute);font-size:12px;width:72px}
.nrow div{flex:1;min-width:0}
.nrow h3{margin:0;font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nrow p{margin:0;color:var(--mute);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nrow p:empty{display:none}
.go{color:var(--accent);font-size:18px}
.panel:not(.news-home) .nrow{padding:12px 8px;border-top:1px solid var(--line)}
.panel:not(.news-home) .nrow:first-child{border-top:0}
.panel:not(.news-home) .nrow h3{font-size:15.5px;white-space:normal}
.panel:not(.news-home) .nrow p{white-space:normal;font-size:13.5px}

/* 分类区块与紧凑卡片 */
.sec{margin:20px 0 8px}
.sec h2{font-size:16px;margin:0 0 10px;display:flex;align-items:center;gap:8px;padding-left:10px;border-left:4px solid var(--accent);line-height:1.2}
.sec h2 a:hover{color:var(--accent)}
.sec h2 small{color:var(--mute);font-weight:400;font-size:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.card{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 12px;transition:.15s;min-width:0}
.card:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:0 4px 14px rgba(43,125,233,.16)}
.card i{flex:none;width:38px;height:38px;border-radius:10px;color:#fff;font:700 18px/38px -apple-system,sans-serif;text-align:center;font-style:normal}
.card div{min-width:0;flex:1}
.card b{display:block;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card p{margin:0;color:var(--mute);font-size:12px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

.empty{color:var(--mute);padding:12px 0;margin:0}
.foot{color:var(--mute);font-size:12px;padding:28px 0 32px;text-align:center}
[hidden]{display:none!important}

@media(max-width:900px){.nlist{grid-template-columns:1fr}}
@media(max-width:760px){
  .top{padding:0 12px;gap:10px}.logo{width:auto;font-size:15px}.toplink{display:none}
  .shell{flex-direction:column}
  .side{position:static;width:100%;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:6px 8px}
  .side nav{flex-direction:row;overflow-x:auto;gap:4px;scrollbar-width:none}
  .side a{white-space:nowrap;padding:6px 10px}.sep{display:none}
  .main{padding:12px}.grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
}

/* INSIGHT-CSS: 心得列表与文章页 */
.igrid{display:grid;gap:14px}
.icard{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;transition:box-shadow .15s,border-color .15s}
.icard:hover{border-color:var(--accent);box-shadow:0 4px 18px rgba(0,0,0,.06)}
.icard h3{margin:6px 0 8px;font-size:17px;line-height:1.45}
.icard p{margin:0;color:#5b6472;font-size:14px;line-height:1.7}
.icard .itop{display:flex;gap:6px;flex-wrap:wrap}
.icard .tag{background:#eef2f9;color:#3d5a8a;border-radius:5px;padding:2px 8px;font-size:12px}
.icard .imeta{display:flex;justify-content:space-between;margin-top:12px;font-size:12.5px;color:#8a94a3}
.art{max-width:760px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:34px 38px 30px}
.art .crumbs{font-size:12.5px;color:#8a94a3;margin-bottom:14px;display:flex;gap:8px;align-items:center}
.art .crumbs a{color:#3d5a8a}
.art h1{font-size:26px;line-height:1.4;margin:0 0 12px;letter-spacing:-.2px}
.art .meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:#6b7585;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:22px}
.art .meta b{color:#1c1f23}
.art .meta .dot{color:#c3cad6}
.art .lead{font-size:15.5px;line-height:1.85;color:#3f4854;background:#f7f9fc;border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 8px 8px 0;margin:0 0 26px}
.art h2{font-size:19px;margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid #eef0f4}
.art h3{font-size:15.5px;margin:22px 0 10px;color:#2a3340}
.art p{font-size:15px;line-height:1.95;margin:0 0 14px;color:#2c333c}
.art ul{margin:0 0 16px;padding-left:20px}
.art li{font-size:14.5px;line-height:1.9;margin-bottom:6px;color:#2c333c}
.art blockquote{margin:18px 0;padding:14px 18px;background:#fff8ec;border-left:3px solid #e0a82e;border-radius:0 8px 8px 0;font-size:15px;color:#6b5320}
.art .tpl{background:#0f1720;color:#d6e2f0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.9;padding:14px 16px;border-radius:10px;margin:0 0 16px;white-space:pre-wrap}
.art .rounds{display:grid;gap:10px;margin:16px 0 18px}
.art .rounds>div{background:#f7f9fc;border:1px solid #e6ebf3;border-radius:10px;padding:12px 14px}
.art .rounds b{display:block;font-size:14px;color:#2f6fed;margin-bottom:4px}
.art .rounds span{font-size:13.5px;line-height:1.8;color:#4a5461}
.art .mono{font-family:ui-monospace,Menlo,monospace;font-size:13px;background:#f1f3f7;padding:1px 6px;border-radius:4px}
.art .notice{margin-top:34px;padding:16px 18px;background:#f7f9fc;border:1px dashed #cfd8e6;border-radius:10px;font-size:13px;line-height:1.85;color:#5b6472}
.art .notice b{color:#2c333c}
.art .notice a{color:#2f6fed;word-break:break-all}
@media (max-width:760px){.art{padding:22px 18px}.art h1{font-size:21px}}

/* KIND-CSS: 时间线类型徽标 */
.kind{display:inline-block;font-size:11px;line-height:1.6;padding:1px 7px;border-radius:4px;margin-right:7px;vertical-align:middle;font-weight:500}
.kind.k-news{background:#e8f1fe;color:#2f6fed}
.kind.k-note{background:#e9f7ee;color:#1f8a4c}

/* LOGO-CSS: 工具卡片 logo */
.card i.lg{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;padding:2px;display:flex;align-items:center;justify-content:center}
.card i.lg img{width:78%;height:78%;object-fit:contain;display:block}

/* UPD-CSS: 首页最新更新改为单列，修掉文字溢出 */
.news-home .nlist{display:flex;flex-direction:column;gap:0}
.news-home .nrow{align-items:flex-start;gap:14px;padding:13px 10px;margin:0;border-top:1px solid var(--line);border-radius:0}
.news-home .nrow:first-child{border-top:0}
.news-home .nrow:hover{background:var(--accent2);border-radius:8px}
.news-home .nrow>time{flex:0 0 84px;padding-top:3px;font-size:12.5px;color:var(--mute)}
.news-home .nrow>div{flex:1 1 auto;min-width:0}
.news-home .nrow h3{white-space:normal;overflow:hidden;text-overflow:clip;font-size:15px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.news-home .nrow p{white-space:normal;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:13px;line-height:1.7;margin-top:4px}
.news-home .nrow .go{flex:none;align-self:center;margin-left:4px}
.news-home .kind{display:inline-block;vertical-align:1px}

/* CTA-CSS: 工具页访问按钮 */
.cta{display:inline-block;margin:6px 0 22px;padding:12px 26px;border-radius:10px;background:#2f6fed;color:#fff;font-weight:600;font-size:15px;box-shadow:0 2px 10px rgba(47,111,237,.25)}
.cta:hover{background:#2560d8;box-shadow:0 4px 16px rgba(47,111,237,.32)}
.art .cta{margin-top:2px}

/* MOBILE-CSS: 移动端防溢出与两列布局 */
html,body{max-width:100%;overflow-x:hidden}
.shell,.main,.sec,.grid,.card{max-width:100%}
img{max-width:100%;height:auto}

@media(max-width:760px){
  .main{padding:10px 10px 0}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .card{padding:8px 9px;gap:8px;border-radius:9px}
  .card i{width:32px;height:32px;font-size:15px;line-height:32px;border-radius:8px}
  .card i.lg img{width:82%;height:82%}
  .card b{font-size:13px;white-space:normal;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
  .card p{font-size:11.5px;-webkit-line-clamp:2}
  .side nav{-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .side nav::-webkit-scrollbar{display:none}
  .sec h2{font-size:15px}
  .hero h1{font-size:20px}
  .nrow{gap:10px}
  .news-home .nrow>time{flex:0 0 72px;font-size:11.5px}
  .cta{display:block;text-align:center;margin:10px 0 20px}
}

@media(max-width:400px){
  .grid{grid-template-columns:1fr}
  .card b{font-size:13.5px}
}

/* PM-CSS: 移动端产品级优化（顶栏换行 / 列表折叠 / 返回按钮） */
.back{display:inline-block;margin:0 0 12px;padding:6px 12px;border:1px solid var(--line);border-radius:8px;font-size:13px;color:var(--accent);text-decoration:none;background:var(--bg)}
.back:hover{border-color:var(--accent)}
.sec .more{display:none}

@media(max-width:760px){
  .top{flex-wrap:wrap;height:auto;padding:8px 10px;gap:8px}
  .logo{width:auto;flex:1 1 auto;font-size:15px}
  #q{order:3;flex:1 1 100%;max-width:none;height:36px;padding:7px 12px}
  .news-home .nrow:nth-child(n+5){display:none}
  .sec .grid .card:nth-child(n+7){display:none}
  .sec .more{display:block;width:100%;margin-top:10px;padding:9px;border:1px solid var(--line);border-radius:9px;background:transparent;color:var(--accent);font:inherit;font-size:13px;cursor:pointer}
  .sec.expanded .grid .card{display:flex !important}
  .hero{padding:14px 0 6px}
}

/* BANNER-CSS: 首页深色横幅 */
.banner{background:linear-gradient(135deg,#0f1b2d 0%,#1b3a5c 100%);color:#eaf2fb;border-radius:14px;padding:26px 24px;margin:0 0 16px}
.banner h1{margin:0 0 8px;font-size:22px;line-height:1.45;letter-spacing:-.2px}
.banner p{margin:0 0 16px;color:#a9c1da;font-size:13.5px;line-height:1.6}
.bacts{display:flex;gap:10px;flex-wrap:wrap}
.bacts a{display:inline-block;padding:9px 18px;border-radius:9px;font-size:14px;text-decoration:none}
.bacts .b1{background:#2f6fed;color:#fff}
.bacts .b2{background:rgba(255,255,255,.14);color:#eaf2fb}
@media(max-width:760px){
  .banner{padding:20px 16px;border-radius:12px;margin-bottom:12px}
  .banner h1{font-size:18.5px}
  .banner p{font-size:12.5px;margin-bottom:14px}
  .bacts a{flex:1 1 45%;text-align:center;padding:10px 12px}
}

/* HUB-CSS: 分类页相关资讯与相邻分类 */
.relnews{margin-top:14px}
.relnews h2,.panel h2{font-size:15px;margin:0 0 10px}
.relnews ul{list-style:none;margin:0;padding:0}
.relnews li{padding:9px 0;border-top:1px solid var(--line);font-size:13.5px;line-height:1.6}
.relnews li:first-child{border-top:0}
.relnews a{color:var(--fg)}
.relnews a:hover{color:var(--accent)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--fg);background:var(--card)}
.chip:hover{border-color:var(--accent);color:var(--accent)}

/* INTRO-CSS: 分类页导语 */
.hero .intro{margin:10px 0 0;font-size:14px;line-height:1.95;color:#4a5461;max-width:820px;background:#f7f9fc;border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:12px 16px}
@media(max-width:760px){.hero .intro{font-size:13px;line-height:1.85;padding:10px 12px}}

/* MOBILE2-CSS: 移动端「最新更新」改为上下排，日期不再独占左侧一列 */
@media(max-width:760px){
  .news-home .nrow{flex-direction:column;align-items:flex-start;gap:4px;padding:12px 8px}
  .news-home .nrow>time{flex:none;width:auto;padding:0;font-size:11.5px;color:var(--mute);letter-spacing:.2px}
  .news-home .nrow>div{width:100%}
  .news-home .nrow h3{font-size:14.5px;line-height:1.5;margin:0}
  .news-home .nrow p{font-size:12.5px;line-height:1.65;margin-top:3px}
  .news-home .nrow .go{display:none}
  .news-home .kind{margin-right:6px}
}