/* IBM Plex Mono · 自托管 latin 子集（共约 30KB），避免第三方 CDN 依赖 */
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:300;font-display:swap;src:url(../fonts/ibm-plex-mono-300.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-400.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-500.woff2) format('woff2')}

:root{
  --ink:#07080E; --panel:#101324; --panel-2:#151935;
  --line:rgba(233,236,246,.09); --line-2:rgba(233,236,246,.18);
  --fg:#EDEFF7; --fg-2:#A7ADC2; --fg-3:#6C7391;
  --accent:#7836FF;
  --head:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono','SF Mono',Menlo,Consolas,monospace;
  --pad:max(5vw,28px);
}
*{margin:0;padding:0;box-sizing:border-box}
html{overflow-x:hidden}
body{background:var(--ink);color:var(--fg);font-family:var(--head);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.7;min-height:100vh;
  display:flex;flex-direction:column}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:var(--head);font-size:inherit;color:inherit}
::selection{background:var(--accent);color:#fff}
.grain{position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E")}
.aura{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aura i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.aura i:nth-child(1){width:620px;height:620px;left:-16%;top:-6%;background:radial-gradient(circle,rgba(74,66,144,.55),transparent 68%)}
.aura i:nth-child(2){width:560px;height:560px;right:-12%;bottom:-18%;background:radial-gradient(circle,rgba(120,54,255,.2),transparent 70%)}
.wrap{max-width:1300px;margin:0 auto;padding:0 var(--pad);position:relative;z-index:2;width:100%}

header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(7,8,14,.72);
  backdrop-filter:blur(18px) saturate(1.4);border-bottom:1px solid var(--line)}
header .bar{height:80px;display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--pad);max-width:1300px;margin:0 auto}
.brand img{height:40px;width:auto;filter:brightness(1.85) saturate(1.05)}
nav{display:flex;gap:32px;align-items:center}
nav a{font-size:14px;color:var(--fg-2);position:relative;padding:6px 0;transition:.3s}
nav a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);transition:.35s}
nav a:hover{color:var(--fg)} nav a:hover::after{width:100%}
.btn{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:500;
  padding:15px 28px;border-radius:4px;border:1px solid transparent;transition:.35s cubic-bezier(.2,.7,.2,1);
  letter-spacing:.02em;cursor:pointer}
.btn-p{background:var(--accent);color:#F6F4FF;width:100%;justify-content:center;padding:18px 28px;font-size:15px}
.btn-p:hover{box-shadow:0 0 0 1px var(--accent),0 16px 44px -14px rgba(120,54,255,.75);transform:translateY(-2px)}
.btn-g{border-color:var(--line-2);color:var(--fg)}
.btn-g:hover{border-color:var(--accent);color:var(--accent)}
.cta-sm{padding:12px 22px;font-size:13.5px}
.burger{display:none;flex-direction:column;gap:5px;padding:8px}
.burger i{width:22px;height:1.5px;background:var(--fg);display:block}

main{flex:1;padding:132px 0 110px}
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.22em;color:#A98CFF;
  display:flex;align-items:center;gap:12px;text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:1px;background:#A98CFF}
h1{font-size:clamp(30px,4.4vw,56px);line-height:1.2;font-weight:600;letter-spacing:-.01em;margin:22px 0 0}
h1 em{font-style:normal;color:var(--accent)}
.lede{color:var(--fg-2);font-size:16px;max-width:52ch;font-weight:300;margin-top:20px}
.grid{display:grid;grid-template-columns:1.35fr .95fr;gap:56px;margin-top:58px;align-items:start}
.grid>*{min-width:0}

/* ---- form ---- */
form{background:linear-gradient(180deg,rgba(21,25,53,.5),rgba(16,19,36,.28));
  border:1px solid var(--line);border-radius:6px;padding:40px 40px 44px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.f-item{margin-bottom:22px}
.f-item label{display:block;font-size:13.5px;color:var(--fg-2);margin-bottom:9px;letter-spacing:.01em}
.f-item label .req{color:var(--accent);margin-left:4px}
.f-item input,.f-item select,.f-item textarea{
  width:100%;background:rgba(7,8,14,.6);border:1px solid var(--line-2);border-radius:4px;
  padding:14px 15px;font-size:14.5px;transition:.3s;outline:none;appearance:none}
.f-item input::placeholder,.f-item textarea::placeholder{color:var(--fg-3)}
.f-item input:focus,.f-item select:focus,.f-item textarea:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px rgba(120,54,255,.16);background:rgba(7,8,14,.85)}
.f-item select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236C7391' stroke-width='1.4' fill='none'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 15px center;padding-right:38px;cursor:pointer}
.f-item select option{background:#101324;color:var(--fg)}
.f-item textarea{min-height:104px;resize:vertical;line-height:1.7}
.f-item .hint{font-family:var(--mono);font-size:10.5px;color:var(--fg-3);margin-top:8px;letter-spacing:.06em}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips label{position:relative;margin:0}
.chips input{position:absolute;opacity:0;pointer-events:none}
.chips span{display:block;font-size:13px;color:var(--fg-2);border:1px solid var(--line-2);
  border-radius:3px;padding:9px 15px;transition:.3s;cursor:pointer}
.chips span:hover{border-color:var(--accent);color:var(--fg)}
.chips input:checked + span{background:var(--accent);border-color:var(--accent);color:#F6F4FF}
.agree{display:flex;gap:10px;align-items:flex-start;margin:6px 0 26px;font-size:12.5px;color:var(--fg-3);line-height:1.6}
.agree input{margin-top:3px;accent-color:var(--accent);width:15px;height:15px;flex:none;cursor:pointer}
.ok{display:none;border:1px solid rgba(120,54,255,.5);background:rgba(120,54,255,.1);
  border-radius:6px;padding:34px 36px;text-align:center}
.ok.show{display:block}
.ok .ic{width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;font-size:24px;
  display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.ok h3{font-size:21px;font-weight:600;margin-bottom:10px}
.ok p{color:var(--fg-2);font-size:14px;font-weight:300}

/* ---- side ---- */
aside .blk{border-top:1px solid var(--line);padding:26px 0}
aside .blk:first-child{border-top:0;padding-top:6px}
aside .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:#A98CFF;text-transform:uppercase}
aside .v{font-size:16px;margin-top:11px;font-weight:500}
aside .v small{display:block;font-size:13px;color:var(--fg-3);font-weight:300;margin-top:5px;font-family:var(--head)}
aside .why p{color:var(--fg-2);font-size:13.6px;font-weight:300;line-height:1.78;margin-top:11px}
.steps{margin-top:14px;counter-reset:s}
.steps div{position:relative;padding-left:30px;color:var(--fg-2);font-size:13.4px;font-weight:300;margin-bottom:14px}
.steps div::before{counter-increment:s;content:"0" counter(s);position:absolute;left:0;top:1px;
  font-family:var(--mono);font-size:10.5px;color:var(--accent)}

footer{border-top:1px solid var(--line);padding:26px 0;position:relative;z-index:2}
footer .bot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--fg-3)}

@media(max-width:1080px){
  .grid{grid-template-columns:1fr;gap:44px}
  nav{display:none} .burger{display:flex}
}
@media(max-width:680px){
  main{padding:112px 0 76px}
  header .bar{height:66px}
  .brand img{height:32px}
  form{padding:26px 22px 30px}
  .f-row{grid-template-columns:1fr}
  h1{font-size:clamp(26px,7.6vw,34px)}
}

/* ===== 生产补充：图片自适应 / 无障碍 / 移动端抽屉 ===== */
picture{display:contents}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:-9999px;top:0;z-index:9999;background:var(--accent);color:#fff;
  padding:13px 22px;font-size:14px;border-radius:0 0 4px 0}
.skip:focus{left:0}
.drawer{position:fixed;inset:0;z-index:99;padding:104px var(--pad) 44px;
  background:rgba(7,8,14,.975);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);
  display:flex;flex-direction:column;opacity:0;transform:translateY(-10px);
  transition:opacity .28s cubic-bezier(.2,.7,.2,1),transform .28s cubic-bezier(.2,.7,.2,1);overflow-y:auto}
.drawer.on{opacity:1;transform:none}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{font-size:19px;font-weight:500;color:var(--fg);padding:17px 2px;
  border-bottom:1px solid var(--line);transition:.25s}
.drawer-nav a:hover{color:var(--accent)}
.drawer .btn{margin-top:30px;justify-content:center;padding:16px 24px}
.burger i{transition:transform .3s,opacity .3s}
.burger.on i:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.on i:nth-child(2){opacity:0}
.burger.on i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.btn:focus-visible,a:focus-visible{outline-offset:2px}