/* ===== Vibe Prompt Hub 首页 v2 ===== */
:root{
  --bg0:#07070c; --bg1:#0b0b13;
  --ink:#f2f2f7; --muted:#9b9baf; --dim:#67677c;
  --line:rgba(255,255,255,.085);
  --line2:rgba(255,255,255,.14);
  --card:rgba(255,255,255,.03);
  --card-h:rgba(255,255,255,.055);
  --grad1:#8b7bff; --grad2:#4cc9f0; --grad3:#f472b6;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Code",Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg0);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:rgba(139,123,255,.35)}

/* ===== 背景层 ===== */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(1200px 800px at 75% -10%,rgba(139,123,255,.10),transparent 60%),
  radial-gradient(900px 700px at 10% 110%,rgba(76,201,240,.07),transparent 60%),
  linear-gradient(180deg,var(--bg0),var(--bg1) 70%,#08080e)}
.bg-grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%)}
.bg-aurora i{position:absolute;display:block;border-radius:50%;filter:blur(90px);opacity:.5;mix-blend-mode:screen}
.bg-aurora i:nth-child(1){width:480px;height:480px;left:-120px;top:8%;background:rgba(139,123,255,.5);animation:drift 26s ease-in-out infinite alternate}
.bg-aurora i:nth-child(2){width:420px;height:420px;right:-140px;top:30%;background:rgba(76,201,240,.38);animation:drift 32s ease-in-out infinite alternate-reverse}
.bg-aurora i:nth-child(3){width:380px;height:380px;left:32%;bottom:-160px;background:rgba(244,114,182,.3);animation:drift 38s ease-in-out infinite alternate}
@keyframes drift{
  0%{transform:translate(0,0) scale(1)}
  50%{transform:translate(60px,-40px) scale(1.12)}
  100%{transform:translate(-50px,50px) scale(.95)}
}
.bg-noise{position:absolute;inset:0;opacity:.05;pointer-events:none;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E")}
.bg-spot{position:absolute;inset:0;opacity:0;transition:opacity .6s var(--ease);pointer-events:none;
  background:radial-gradient(600px 420px at var(--mx,50%) var(--my,30%),rgba(139,123,255,.14),transparent 65%)}
body:hover .bg-spot{opacity:1}

/* ===== 顶部导航 ===== */
.nav{
  position:sticky;top:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 28px;
  background:rgba(7,7,12,.62);
  backdrop-filter:blur(20px) saturate(1.4);
  -webkit-backdrop-filter:blur(20px) saturate(1.4);
  border-bottom:1px solid var(--line);
}
.nav-brand{display:flex;align-items:center;gap:10px;transition:opacity .2s}
.nav-brand:hover{opacity:.85}
.nav-logo{width:30px;height:30px;border-radius:8px;box-shadow:0 4px 14px -4px rgba(139,123,255,.5)}
.nav-name{font-weight:800;font-size:16px;letter-spacing:.02em}
.nav-accent{background:linear-gradient(90deg,var(--grad1),var(--grad2));-webkit-background-clip:text;background-clip:text;color:transparent;margin-left:4px}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{font-size:14px;color:var(--muted);transition:color .2s,transform .2s;position:relative}
.nav-links a:hover{color:var(--ink)}
.nav-links a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-5px;width:0;height:1.5px;background:linear-gradient(90deg,var(--grad1),var(--grad2));transition:width .25s var(--ease)}
.nav-links a:not(.nav-cta):hover::after{width:100%}
.nav-cta{
  color:var(--ink)!important;font-weight:700;
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 18px;border-radius:999px;
  background:linear-gradient(135deg,var(--grad1),var(--grad2));
  box-shadow:0 6px 24px -8px rgba(139,123,255,.55);
  transition:transform .2s var(--ease),box-shadow .2s;
}
.nav-cta:hover{transform:translateY(-1px) scale(1.02);box-shadow:0 10px 30px -8px rgba(139,123,255,.7)}
.nav-cta::after{display:none!important}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:6px}
.nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:60px 24px}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-img{width:100%;height:100%;object-fit:cover;opacity:.5;animation:heroIn 2.2s var(--ease) both}
@keyframes heroIn{from{opacity:0;transform:scale(1.06)}to{opacity:.5;transform:scale(1)}}
.hero-veil{position:absolute;inset:0;background:
  radial-gradient(ellipse 80% 60% at 50% 40%,transparent 0%,rgba(7,7,12,.4) 70%,var(--bg0) 100%),
  linear-gradient(180deg,rgba(7,7,12,.55) 0%,rgba(7,7,12,.15) 45%,var(--bg0) 100%)}
.hero-scan{position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:linear-gradient(180deg,transparent 0%,rgba(139,123,255,.06) 48%,transparent 52%);
  background-size:100% 300%;
  animation:scan 9s linear infinite}
@keyframes scan{0%{background-position:0 -300%}100%{background-position:0 300%}}
.hero-inner{position:relative;z-index:2;max-width:900px;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;color:var(--muted);
  padding:7px 16px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  backdrop-filter:blur(8px);
  margin-bottom:26px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--grad2);box-shadow:0 0 12px rgba(76,201,240,.9);animation:pulse 2.2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero-title{
  font-size:clamp(40px,7vw,74px);
  font-weight:900;letter-spacing:-.03em;line-height:1.08;
  margin-bottom:22px;
}
.grad{background:linear-gradient(92deg,var(--grad1),var(--grad2) 55%,var(--grad3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(15px,2vw,18px);color:var(--muted);margin-bottom:34px}
.hero-sub b{color:var(--ink)}
.br-desk{display:block}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:800;font-size:15px;color:#fff;
  padding:14px 28px;border-radius:14px;
  background:linear-gradient(135deg,var(--grad1),var(--grad2));
  box-shadow:0 12px 34px -10px rgba(139,123,255,.65),inset 0 1px 0 rgba(255,255,255,.22);
  transition:transform .22s var(--ease),box-shadow .22s;
}
.btn-main:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 18px 44px -10px rgba(139,123,255,.8),inset 0 1px 0 rgba(255,255,255,.22)}
.btn-ghost{
  display:inline-flex;align-items:center;
  font-weight:600;font-size:14.5px;color:var(--ink);
  padding:14px 24px;border-radius:14px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line2);
  transition:background .2s,transform .2s var(--ease),border-color .2s;
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(139,123,255,.5);transform:translateY(-2px)}
.hero-stats{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}
.stat{
  min-width:132px;padding:16px 20px;border-radius:16px;
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:border-color .2s,transform .2s var(--ease),background .2s;
}
.stat:hover{border-color:rgba(139,123,255,.4);background:rgba(255,255,255,.06);transform:translateY(-3px)}
.stat b{display:block;font-size:26px;font-weight:800;letter-spacing:-.02em;background:linear-gradient(90deg,#fff,#c9c4ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:12px;color:var(--dim)}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;width:24px;height:38px;border:2px solid rgba(255,255,255,.25);border-radius:14px}
.hero-scroll span{position:absolute;top:7px;left:50%;width:3px;height:7px;margin-left:-1.5px;border-radius:2px;background:rgba(255,255,255,.6);animation:scrollDot 1.8s ease-in-out infinite}
@keyframes scrollDot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(13px);opacity:0}100%{opacity:0}}

/* ===== 通用区块 ===== */
.sec{max-width:1180px;margin:0 auto;padding:96px 28px}
.sec-head{max-width:760px;margin-bottom:52px}
.sec-kicker{font-size:12.5px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--grad2);margin-bottom:14px}
.sec-title{font-size:clamp(26px,4vw,40px);font-weight:900;letter-spacing:-.02em;line-height:1.2;margin-bottom:16px}
.sec-desc{font-size:15.5px;color:var(--muted)}

/* ===== 版块入口 ===== */
.sgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.scard{
  position:relative;display:flex;flex-direction:column;gap:10px;
  padding:26px;border-radius:20px;
  background:var(--card);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
  overflow:hidden;
  transition:border-color .25s,background .25s,transform .25s var(--ease),box-shadow .25s;
  will-change:transform;
}
.scard::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(380px 200px at var(--cx,50%) var(--cy,50%),rgba(139,123,255,.14),transparent 70%);
}
.scard:hover{border-color:rgba(139,123,255,.45);background:var(--card-h);box-shadow:0 20px 50px -20px rgba(0,0,0,.6)}
.scard:hover::before{opacity:1}
.scard-ico{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:4px;border:1px solid var(--line2)}
.ic-21{color:var(--grad1);background:rgba(139,123,255,.12)}
.ic-ms{color:var(--grad2);background:rgba(76,201,240,.12)}
.ic-up{color:#f0abfc;background:rgba(240,171,252,.12)}
.ic-sb{color:#fbbf24;background:rgba(251,191,36,.12)}
.ic-re{color:#34d399;background:rgba(52,211,153,.12)}
.ic-more{color:var(--dim);background:rgba(255,255,255,.05)}
.scard-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.scard-name{font-size:19px;font-weight:800;letter-spacing:-.01em}
.scard-count{font-size:12.5px;color:var(--grad2);background:rgba(139,123,255,.1);border:1px solid rgba(139,123,255,.22);padding:3px 10px;border-radius:999px;white-space:nowrap}
.scard-desc{font-size:13.5px;color:var(--muted);line-height:1.7;flex:1}
.scard-tag{font-size:11.5px;color:var(--grad2);letter-spacing:.06em;font-weight:700}
.scard-go{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--ink);opacity:.85;transition:gap .25s var(--ease),opacity .25s}
.scard:hover .scard-go{gap:10px;opacity:1}
.scard-more{border-style:dashed;justify-content:center;align-items:flex-start;opacity:.8}
.scard-more .scard-tag{color:var(--dim)}
.more-desc{font-size:13.5px;color:var(--muted)}

/* ===== 教程中心 ===== */
.tut-tabs{
  position:sticky;top:70px;z-index:30;
  display:flex;gap:8px;flex-wrap:wrap;
  padding:10px;margin-bottom:44px;
  border-radius:16px;
  background:rgba(10,10,18,.7);
  border:1px solid var(--line);
  backdrop-filter:blur(16px);
  width:fit-content;max-width:100%;
}
.tut-tab{
  font-size:13.5px;font-weight:700;color:var(--muted);
  padding:9px 18px;border-radius:10px;
  transition:color .2s,background .2s;
}
.tut-tab:hover{color:var(--ink)}
.tut-tab.active{color:var(--ink);background:linear-gradient(135deg,rgba(139,123,255,.22),rgba(76,201,240,.16));box-shadow:inset 0 0 0 1px rgba(139,123,255,.35)}
.tut-block{margin-bottom:88px;scroll-margin-top:140px}
.tut-head{display:flex;gap:26px;align-items:center;margin-bottom:34px}
.tut-img{
  width:150px;height:150px;flex:none;object-fit:cover;border-radius:22px;
  border:1px solid var(--line2);
  box-shadow:0 24px 60px -22px rgba(139,123,255,.45);
  transition:transform .4s var(--ease);
}
.tut-block:hover .tut-img{transform:translateY(-4px) rotate(-1deg)}
.tut-head-txt h3{font-size:clamp(22px,3.4vw,32px);font-weight:900;letter-spacing:-.02em;line-height:1.25;margin:6px 0 10px}
.tut-head-txt p{font-size:14.5px;color:var(--muted)}
.tut-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:18px}
.tcard{
  display:flex;flex-direction:column;
  border-radius:18px;
  background:var(--card);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
  overflow:hidden;
  transition:border-color .25s,transform .25s var(--ease),box-shadow .25s;
}
.tcard:hover{border-color:rgba(76,201,240,.35);transform:translateY(-3px);box-shadow:0 18px 44px -18px rgba(0,0,0,.55)}
.tcard-head{
  display:flex;align-items:center;gap:10px;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(135deg,rgba(139,123,255,.08),rgba(76,201,240,.05));
}
.tcard-tag{
  font-size:10.5px;font-weight:800;letter-spacing:.08em;color:var(--grad2);
  padding:3px 9px;border-radius:999px;
  background:rgba(76,201,240,.1);border:1px solid rgba(76,201,240,.25);
  flex:none;
}
.tcard-head h4{font-size:16.5px;font-weight:800;letter-spacing:-.01em}
.tcard-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:16px}
.titem-t{font-size:13px;font-weight:700;color:var(--ink);margin-bottom:5px;display:flex;gap:8px;align-items:baseline}
.titem-t::before{content:"";width:6px;height:6px;border-radius:2px;background:linear-gradient(135deg,var(--grad1),var(--grad2));flex:none;transform:translateY(-1px)}
.titem-d{font-size:13.5px;color:var(--muted);line-height:1.75}
.titem-list{list-style:none;display:flex;flex-direction:column;gap:7px}
.titem-list li{
  position:relative;padding-left:16px;
  font-size:13.5px;color:var(--muted);line-height:1.7;
}
.titem-list li::before{content:"—";position:absolute;left:0;color:var(--grad2);opacity:.7}
.titem-code{
  margin-top:2px;padding:14px 16px;border-radius:12px;
  background:#0a0a14;border:1px solid var(--line2);
  font-family:var(--mono);font-size:12px;line-height:1.7;color:#c9d4f0;
  white-space:pre-wrap;word-break:break-word;
  cursor:pointer;transition:border-color .2s,background .2s;
}
.titem-code:hover{border-color:rgba(76,201,240,.6);background:#0d0d1a}

/* ===== 去 AI 味实验室 ===== */
.lab{display:flex;align-items:stretch;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.lab-panel{
  flex:1;min-width:280px;padding:22px;border-radius:18px;
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.lab-ai{border-color:rgba(244,114,182,.25);background:linear-gradient(160deg,rgba(244,114,182,.06),transparent)}
.lab-human{border-color:rgba(76,201,240,.3);background:linear-gradient(160deg,rgba(76,201,240,.06),transparent)}
.lab-tag{font-size:11px;font-weight:800;letter-spacing:.1em;margin-bottom:12px;color:var(--dim)}
.lab-ai .lab-tag{color:var(--grad3)}
.lab-human .lab-tag{color:var(--grad2)}
.lab-panel p{font-size:14px;line-height:1.85;transition:opacity .22s;color:var(--ink)}
.lab-panel p.dim{color:var(--dim)}
.lab-btn{
  align-self:center;flex:none;
  display:inline-flex;align-items:center;gap:8px;
  font-weight:800;font-size:14px;color:#fff;
  padding:13px 22px;border-radius:13px;border:none;
  background:linear-gradient(135deg,var(--grad3),var(--grad1));
  box-shadow:0 10px 26px -10px rgba(244,114,182,.6);
  transition:transform .2s var(--ease),box-shadow .2s;
}
.lab-btn:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 14px 34px -10px rgba(244,114,182,.75)}
.lab-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px}
.lab-table{
  border-radius:16px;overflow:hidden;
  border:1px solid var(--line);
  background:var(--card);
}
.lab-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:12px 18px;font-size:13.5px;border-top:1px solid var(--line)}
.lab-row:first-child{border-top:none}
.lab-row span:first-child{color:var(--grad3);opacity:.95}
.lab-row span:last-child{color:var(--muted)}
.lab-row-head{font-weight:800;font-size:12px;letter-spacing:.06em;color:var(--dim);background:rgba(255,255,255,.03)}
.lab-row:hover{background:rgba(255,255,255,.03)}

/* ===== 三步使用 ===== */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.step{
  position:relative;padding:30px;border-radius:20px;
  background:var(--card);border:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:border-color .25s,transform .25s var(--ease),box-shadow .25s;
}
.step:hover{border-color:rgba(139,123,255,.4);transform:translateY(-3px);box-shadow:0 18px 44px -18px rgba(0,0,0,.55)}
.step-num{
  display:inline-block;font-family:var(--mono);font-size:13px;font-weight:700;color:var(--grad1);
  padding:4px 10px;border-radius:8px;
  background:rgba(139,123,255,.1);border:1px solid rgba(139,123,255,.25);
  margin-bottom:14px;
}
.step h3{font-size:18px;font-weight:800;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ===== 页脚 ===== */
.foot{border-top:1px solid var(--line);padding:56px 28px 34px;text-align:center}
.foot-top{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.foot-brand{display:flex;align-items:center;gap:10px}
.foot-slogan{font-size:14px;color:var(--muted)}
.disc{max-width:760px;margin:0 auto 26px;text-align:left;border:1px solid var(--line);border-radius:14px;background:var(--card);overflow:hidden}
.disc-head{width:100%;display:flex;align-items:center;gap:8px;padding:13px 18px;background:none;border:none;color:var(--muted);font-size:13px;font-weight:600}
.disc-head span{margin-left:auto;transition:transform .2s}
.disc-body{display:none;padding:4px 18px 16px;font-size:12.5px;color:var(--dim);line-height:1.9}
.disc-body.open{display:block}
.disc-body p{margin-bottom:6px}
.foot-bottom{font-size:12px;color:var(--dim)}

/* ===== reveal 动画 ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.tilt{will-change:transform}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .nav-links{
    position:fixed;top:58px;left:0;right:0;z-index:59;
    flex-direction:column;align-items:flex-start;gap:18px;
    padding:22px 28px;background:rgba(7,7,12,.96);
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.25s var(--ease);
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-burger{display:flex}
  .hero{min-height:auto;padding-top:100px}
  .br-desk{display:none}
  .tut-tabs{position:static}
  .tut-head{flex-direction:column;text-align:center}
  .tut-img{width:120px;height:120px}
  .sec{padding:72px 20px}
}
@media (max-width:520px){
  .stat{min-width:calc(50% - 6px)}
  .hero-title{font-size:38px}
}

/* ---------- 访问量 ---------- */
.vstats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:0 0 22px}
.vstat{font-size:12.5px;font-weight:600;color:var(--muted);background:var(--panel, rgba(255,255,255,.04));border:1px solid var(--line, rgba(255,255,255,.09));border-radius:999px;padding:6px 16px;letter-spacing:.02em}
.vstat b{color:var(--accent-strong, #e6cc93);margin-left:3px}