*,*::before,*::after{box-sizing:border-box}
:root{
  color-scheme:light;
  --bg:#f5f7fb; --card:#ffffff; --fg:#1a2233; --muted:#667085; --line:#e6e9f0;
  --accent:#2f6df6; --accent-2:#7c5cff; --accent-soft:#e8efff;
  --code-bg:#f2f4f8; --shadow:0 1px 2px rgba(16,24,40,.05),0 10px 30px rgba(16,24,40,.07);
  --radius:16px; --maxw:1080px;
}
html[data-theme="dark"]{
  color-scheme:dark;
  --bg:#080d18; --card:#101a2e; --fg:#e6edf8; --muted:#93a4bd; --line:#1d2a42;
  --accent:#5b8cff; --accent-2:#a78bfa; --accent-soft:#16233c;
  --code-bg:#0a1120; --shadow:0 1px 2px rgba(0,0,0,.5),0 14px 36px rgba(0,0,0,.45);
}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--fg);line-height:1.75;
  font-family:system-ui,-apple-system,"Segoe UI","Noto Sans SC","Microsoft YaHei",sans-serif;
  transition:background .35s ease,color .35s ease;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;border-radius:12px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- 顶栏 ---------- */
header.top{
  position:sticky;top:0;z-index:50;backdrop-filter:saturate(150%) blur(12px);
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  border-bottom:1px solid var(--line);
}
.top .inner{display:flex;align-items:center;gap:18px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--fg)}
.brand:hover{text-decoration:none}
.brand .logo{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;color:#fff;font-size:15px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 6px 16px rgba(47,109,246,.35)
}
nav.main{display:flex;gap:4px;margin-left:8px;flex:1}
nav.main a{padding:7px 12px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:600}
nav.main a:hover{background:var(--accent-soft);color:var(--accent);text-decoration:none}
nav.main a.on{background:var(--accent-soft);color:var(--accent)}
.top .right{display:flex;align-items:center;gap:8px}
.who{font-size:13.5px;color:var(--muted);max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
a.who:hover{color:var(--accent);text-decoration:none}
a.who span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 主题开关 ---------- */
.themebtn{
  width:36px;height:36px;border-radius:11px;border:1px solid var(--line);background:var(--card);
  color:var(--fg);cursor:pointer;display:grid;place-items:center;transition:.2s;padding:0
}
.themebtn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.themebtn svg{width:18px;height:18px}
.themebtn .moon{display:none}
html[data-theme="dark"] .themebtn .sun{display:none}
html[data-theme="dark"] .themebtn .moon{display:block}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:11px;font-size:14.5px;
  font-weight:650;border:1px solid var(--line);background:var(--card);color:var(--fg);cursor:pointer;transition:.18s
}
.btn:hover{transform:translateY(-1px);border-color:var(--accent);text-decoration:none}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border:none;color:#fff;
  box-shadow:0 8px 20px rgba(47,109,246,.28)}
.btn.primary:hover{box-shadow:0 10px 26px rgba(47,109,246,.38)}
.btn.danger{color:#e11d48;border-color:#fecdd3}
.btn.sm{padding:5px 11px;font-size:13px;border-radius:9px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700;
  background:var(--accent-soft);color:var(--accent);margin-right:6px}
.pill.gray{background:var(--code-bg);color:var(--muted)}
.pill.lock{background:#fff1e6;color:#c2410c}
html[data-theme="dark"] .pill.lock{background:#3a1f0e;color:#fdba74}
.muted{color:var(--muted)}
.center{text-align:center}
hr.sep{border:none;border-top:1px solid var(--line);margin:26px 0}

/* ---------- 首页 Hero ---------- */
.hero{padding:60px 0 36px}
.hero h1{
  font-size:clamp(30px,5vw,46px);line-height:1.2;margin:0 0 14px;letter-spacing:-.5px;
  background:linear-gradient(120deg,var(--accent),var(--accent-2) 70%);
  -webkit-background-clip:text;background-clip:text;color:transparent
}
.hero p.lead{font-size:17px;color:var(--muted);max-width:620px;margin:0 0 26px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.stats{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.stats div b{display:block;font-size:22px;color:var(--fg)}
.stats div span{font-size:13px;color:var(--muted)}

/* ---------- 文章列表 ---------- */
.section-title{display:flex;align-items:center;gap:12px;margin:34px 0 18px}
.section-title h2{font-size:19px;margin:0}
.section-title .line{flex:1;height:1px;background:var(--line)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}
.post-card{padding:22px;display:flex;flex-direction:column;gap:10px;transition:.22s}
.post-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.post-card h3{margin:0;font-size:18px;line-height:1.45}
.post-card h3 a{color:var(--fg)}
.post-card h3 a:hover{color:var(--accent);text-decoration:none}
.post-card .sum{color:var(--muted);font-size:14.5px;margin:0;flex:1}
.post-card .meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:12px;padding:2px 9px;border-radius:999px;background:var(--code-bg);color:var(--muted)}
.tag:hover{background:var(--accent-soft);color:var(--accent);text-decoration:none}

/* ---------- 文章正文 ---------- */
.article{max-width:760px;margin:38px auto 60px;padding:0 20px}
.article h1{font-size:clamp(25px,4vw,34px);line-height:1.3;margin:0 0 10px}
.article .meta{margin-bottom:26px;color:var(--muted);font-size:14px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.prose{font-size:16.5px}
.prose h2{font-size:22px;margin:36px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.prose h3{font-size:18.5px;margin:26px 0 10px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{padding-left:24px;margin:0 0 16px}
.prose li{margin:5px 0}
.prose blockquote{margin:18px 0;padding:12px 18px;border-left:3px solid var(--accent);
  background:var(--code-bg);border-radius:0 12px 12px 0;color:var(--muted)}
.prose code{background:var(--code-bg);padding:2px 7px;border-radius:7px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace}
.prose pre{background:var(--code-bg);border:1px solid var(--line);border-radius:12px;padding:15px 17px;overflow:auto}
.prose pre code{background:none;padding:0;font-size:13.5px;line-height:1.65}
.prose hr{border:none;border-top:1px solid var(--line);margin:28px 0}
.prose table{border-collapse:collapse;width:100%;font-size:14.5px}
.prose th,.prose td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.prose th{background:var(--code-bg)}

/* ---------- 下载区 ---------- */
.cat{margin-bottom:22px;overflow:hidden}
.cat .head{display:flex;align-items:center;gap:12px;padding:16px 22px;border-bottom:1px solid var(--line)}
.cat .head h3{margin:0;font-size:17px}
.cat .head .desc{color:var(--muted);font-size:13.5px;flex:1}
table.files{width:100%;border-collapse:collapse;font-size:14.5px}
table.files th{text-align:left;padding:10px 22px;color:var(--muted);font-weight:600;
  font-size:12.5px;background:var(--code-bg);text-transform:uppercase;letter-spacing:.4px}
table.files td{padding:11px 22px;border-top:1px solid var(--line)}
table.files tr:hover td{background:color-mix(in srgb,var(--accent) 5%,transparent)}
table.files .fname{font-weight:600}
table.files .fname .ico{margin-right:8px;opacity:.75}
.empty{padding:26px 22px;color:var(--muted)}
.locked{padding:26px 22px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.locked .big{font-size:26px}

/* ---------- 表单 / 认证 ---------- */
.auth{max-width:420px;margin:52px auto 70px;padding:30px}
.auth h1{font-size:23px;margin:0 0 6px}
.auth .sub{color:var(--muted);font-size:14px;margin-bottom:22px}
.field{margin-bottom:15px}
.field label{display:block;font-size:13.5px;font-weight:650;margin-bottom:6px;color:var(--muted)}
input[type=text],input[type=password],input[type=email],input[type=number],select,textarea{
  width:100%;padding:10px 13px;border-radius:11px;border:1px solid var(--line);
  background:var(--bg);color:var(--fg);font-size:15px;font-family:inherit;transition:.18s
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}
textarea{min-height:150px;line-height:1.7;resize:vertical}
textarea.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px}
.form-row{display:flex;gap:14px;flex-wrap:wrap}
.form-row .field{flex:1;min-width:180px}
.hint{font-size:13px;color:var(--muted);margin-top:6px}
.switch{display:flex;align-items:center;gap:9px;font-size:14.5px;margin:10px 0}
.switch input{width:auto}

/* ---------- 提示 ---------- */
.flash{position:fixed;right:20px;bottom:20px;z-index:99;padding:13px 18px;border-radius:13px;
  font-size:14.5px;font-weight:600;box-shadow:var(--shadow);animation:pop .3s ease;
  background:var(--card);border:1px solid var(--line);max-width:min(420px,90vw)}
.flash.ok{border-color:#86efac;background:#f0fdf4;color:#166534}
.flash.err{border-color:#fca5a5;background:#fef2f2;color:#991b1b}
html[data-theme="dark"] .flash.ok{background:#0f2a1b;color:#86efac}
html[data-theme="dark"] .flash.err{background:#2a1113;color:#fca5a5}
@keyframes pop{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- 后台 ---------- */
.admin{display:grid;grid-template-columns:210px 1fr;gap:22px;padding:26px 20px 60px;
  max-width:var(--maxw);margin:0 auto}
.side{position:sticky;top:80px;align-self:start;padding:12px}
.side a{display:block;padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:600}
.side a:hover{background:var(--accent-soft);color:var(--accent);text-decoration:none}
.side a.on{background:var(--accent-soft);color:var(--accent)}
.side .grp{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;
  padding:14px 13px 6px;font-weight:700}
.panel{padding:22px;margin-bottom:20px}
.panel h2{margin:0 0 4px;font-size:18px}
.panel .sub{color:var(--muted);font-size:13.5px;margin-bottom:18px}
table.list{width:100%;border-collapse:collapse;font-size:14px}
table.list th{text-align:left;padding:9px 12px;color:var(--muted);font-size:12.5px;
  border-bottom:1px solid var(--line);text-transform:uppercase;letter-spacing:.4px}
table.list td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
table.list tr:last-child td{border-bottom:none}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px}
.kpi{padding:16px 18px;border-radius:14px;background:var(--code-bg)}
.kpi b{display:block;font-size:24px}
.kpi span{font-size:13px;color:var(--muted)}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* ---------- 页脚 ---------- */
footer.bottom{margin-top:60px;padding:26px 0 40px;border-top:1px solid var(--line);
  color:var(--muted);font-size:13.5px}
footer.bottom .wrap{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* ---------- 交流群 ---------- */
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.group{padding:20px;display:flex;gap:16px;align-items:flex-start;transition:transform .22s,box-shadow .22s,border-color .22s}
.group:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.group .qr{width:124px;height:124px;flex:none;border-radius:12px;border:1px solid var(--line);
  background:#fff;object-fit:contain;cursor:zoom-in;padding:3px}
.group .qr.ph{display:grid;place-items:center;color:var(--muted);font-size:12px;text-align:center;
  padding:10px;background:var(--code-bg);border-style:dashed}
.group .info{flex:1;min-width:0}
.group .info h3{margin:0 0 6px;font-size:16.5px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.group .info p{margin:0;color:var(--muted);font-size:14px}
.group .num{display:flex;align-items:center;gap:8px;margin:9px 0;flex-wrap:wrap}
.group .num code{font-size:15px;font-weight:700;letter-spacing:.4px;background:var(--code-bg);
  padding:3px 9px;border-radius:8px}
.copybtn{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:8px;
  padding:3px 9px;font-size:12px;cursor:pointer;transition:.18s}
.copybtn:hover{color:var(--accent);border-color:var(--accent)}
#lightbox{position:fixed;inset:0;z-index:200;display:none;place-items:center;
  background:rgba(0,0,0,.8);padding:22px;cursor:zoom-out;animation:pop .22s ease}
#lightbox.on{display:grid}
#lightbox img{max-width:min(92vw,540px);max-height:86vh;border-radius:16px;
  box-shadow:0 24px 70px rgba(0,0,0,.55);background:#fff}
#lightbox .tip{position:absolute;bottom:22px;color:#fff;opacity:.75;font-size:13px}

/* ---------- 表格横向滚动（手机端不挤成一团） ---------- */
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:12px}
.tablewrap table{min-width:540px}

/* ---------- 动画装饰 ---------- */
.hero{position:relative}
.hero .blobs{position:absolute;left:0;right:0;top:-40px;height:330px;overflow:hidden;
  pointer-events:none;z-index:0}
.hero .blobs i{position:absolute;display:block;border-radius:50%;filter:blur(48px);opacity:.52;
  animation:float 15s ease-in-out infinite}
.hero .blobs i:nth-child(1){width:280px;height:280px;left:-50px;top:6px;
  background:color-mix(in srgb,var(--accent) 62%,transparent)}
.hero .blobs i:nth-child(2){width:240px;height:240px;right:4%;top:-34px;animation-delay:-5s;
  background:color-mix(in srgb,var(--accent-2) 58%,transparent)}
.hero .blobs i:nth-child(3){width:190px;height:190px;left:36%;top:120px;animation-delay:-9s;
  background:color-mix(in srgb,#22d3ee 42%,transparent)}
html[data-theme="dark"] .hero .blobs i{opacity:.34}
.hero h1,.hero p.lead,.hero .cta,.hero .stats{position:relative;z-index:1}
@keyframes float{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  33%{transform:translate3d(26px,-20px,0) scale(1.07)}
  66%{transform:translate3d(-20px,16px,0) scale(.95)}
}
.hero h1{background-size:220% 220%;animation:gradientMove 10s ease infinite}
@keyframes gradientMove{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.reveal{opacity:0;transform:translateY(18px);
  transition:opacity .65s cubic-bezier(.2,.7,.3,1),transform .65s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* ---------- 手机端 ---------- */
@media(max-width:760px){
  body{font-size:15.5px;-webkit-tap-highlight-color:transparent}
  .wrap{padding:0 15px}
  .top .inner{height:auto;padding:9px 0;flex-wrap:wrap;gap:8px}
  .brand{font-size:16px}
  .brand .logo{width:27px;height:27px;border-radius:8px;font-size:14px}
  nav.main{order:3;width:100%;overflow-x:auto;margin:0 -15px;padding:0 15px 3px;
    scrollbar-width:none;-webkit-overflow-scrolling:touch}
  nav.main::-webkit-scrollbar{display:none}
  nav.main a{white-space:nowrap;padding:8px 11px;font-size:14px}
  .top .right{gap:6px;margin-left:auto}
  .who{max-width:78px;font-size:13px}
  .themebtn{width:34px;height:34px;border-radius:10px}
  .btn{padding:9px 14px;font-size:14px}
  .btn.sm{padding:6px 10px;font-size:12.5px}
  input[type=text],input[type=password],input[type=email],input[type=number],select,textarea{font-size:16px}
  .hero{padding:26px 0 18px}
  .hero h1{font-size:29px}
  .hero p.lead{font-size:15.5px;margin-bottom:20px}
  .hero .cta{gap:9px}
  .hero .cta .btn{flex:1;justify-content:center}
  .hero .blobs{height:250px;top:-20px}
  .stats{gap:14px 22px;margin-top:22px}
  .stats div b{font-size:19px}
  .grid,.groups{grid-template-columns:1fr;gap:14px}
  .post-card{padding:17px}
  .section-title{margin:26px 0 14px}
  .section-title h2{font-size:17.5px}
  .article{margin:22px auto 44px;padding:0 15px}
  .article h1{font-size:24px}
  .prose{font-size:16px}
  .prose h2{font-size:19.5px;margin:28px 0 10px}
  .prose pre{padding:13px;font-size:12.8px;border-radius:11px}
  .cat .head{padding:14px 16px;flex-wrap:wrap;gap:6px}
  table.files th,table.files td{padding:10px 14px}
  table.files th:nth-child(3),table.files td:nth-child(3){display:none}
  /* 手机上表格改成可横向滑动的块，避免挤成一团 */
  table.files,table.list,.prose table{display:block;overflow-x:auto;white-space:nowrap;
    -webkit-overflow-scrolling:touch}
  .tablewrap table{min-width:480px}
  .auth{margin:24px 0 48px;padding:22px 18px}
  .admin{grid-template-columns:1fr;padding:14px 12px 46px}
  .side{position:static;display:flex;gap:6px;overflow-x:auto;padding:8px;scrollbar-width:none}
  .side::-webkit-scrollbar{display:none}
  .side .grp{display:none}
  .side a{white-space:nowrap;padding:8px 12px}
  .panel{padding:17px}
  .kpis{grid-template-columns:repeat(auto-fit,minmax(108px,1fr));gap:10px}
  .kpi b{font-size:20px}
  .form-row{flex-direction:column;gap:0}
  .group{padding:16px;flex-direction:column;align-items:center;text-align:center}
  .group .qr{width:min(72vw,230px);height:min(72vw,230px)}
  .group .num{justify-content:center}
  .group .info h3{justify-content:center}
  .flash{left:14px;right:14px;bottom:14px;max-width:none}
  footer.bottom{margin-top:38px;padding:20px 0 30px}
  footer.bottom .wrap{flex-direction:column;gap:8px;text-align:center;justify-content:center}
}
@media(max-width:420px){
  nav.main a{font-size:13.5px;padding:7px 9px}
  .hero h1{font-size:25px}
  .who{max-width:54px;font-size:12.5px}
  .stats{gap:12px 16px}
}