/* Cloudflare Pages · 域名配置生成器 */
:root{
  --bg:#080b12;
  --bg-2:#0d121c;
  --card:rgba(255,255,255,.045);
  --card-line:rgba(255,255,255,.09);
  --ink:#eef2f8;
  --ink-2:#a8b3c4;
  --ink-3:#6d7788;
  --accent:#f6821f;
  --accent-2:#ffb266;
  --ok:#3ecf8e;
  --bad:#ff6b6b;
  --mono:"SFMono-Regular",ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(246,130,31,.20), transparent 62%),
    radial-gradient(760px 480px at 88% 4%, rgba(88,120,255,.16), transparent 60%),
    linear-gradient(180deg,#080b12 0%,#0a0f18 44%,#080b12 100%);
  color:var(--ink);
  font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:3px 3px;
  mask-image:radial-gradient(ellipse at 50% 0%, #000 20%, transparent 78%);
}
a{color:var(--accent-2);text-decoration:none}
a:hover{color:#fff}
code{font-family:var(--mono);font-size:.9em;color:#ffd0a6;background:rgba(246,130,31,.1);
  border:1px solid rgba(246,130,31,.18);border-radius:6px;padding:.12em .42em}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;gap:22px;
  padding:16px clamp(18px,5vw,64px);
  backdrop-filter:blur(16px);
  background:linear-gradient(180deg,rgba(8,11,18,.88),rgba(8,11,18,.55));
  border-bottom:1px solid rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:650;letter-spacing:-.015em}
.brand-mark{
  display:grid;place-items:center;width:34px;height:34px;border-radius:11px;
  color:#0b0f17;background:linear-gradient(150deg,var(--accent-2),var(--accent));
  box-shadow:0 8px 22px -8px rgba(246,130,31,.9);
}
.brand-text .dim{color:var(--ink-3);font-weight:500;margin-left:3px}
.nav-links{display:flex;gap:20px;margin-left:auto;font-size:.9rem}
.nav-links a{color:var(--ink-2);font-weight:500}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.76rem;color:var(--ink-2);
  border:1px solid var(--card-line);border-radius:999px;padding:6px 12px;
  background:rgba(255,255,255,.03);white-space:nowrap;
}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(62,207,142,.6);animation:p 2.4s infinite}
@keyframes p{0%{box-shadow:0 0 0 0 rgba(62,207,142,.55)}70%{box-shadow:0 0 0 9px rgba(62,207,142,0)}100%{box-shadow:0 0 0 0 rgba(62,207,142,0)}}

/* ---------- hero ---------- */
main{position:relative;z-index:1;max-width:1120px;margin:0 auto;padding:0 clamp(18px,5vw,64px) 90px}
.hero{padding:clamp(52px,9vw,110px) 0 34px;text-align:center}
.eyebrow{
  margin:0 0 18px;font-size:.72rem;letter-spacing:.24em;color:var(--accent-2);
  font-family:var(--mono);text-transform:uppercase;
}
.hero h1{
  margin:0;font-size:clamp(2.05rem,5.4vw,3.6rem);line-height:1.12;letter-spacing:-.035em;font-weight:700;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--accent-2),var(--accent) 55%,#ff8a3d);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{
  max-width:640px;margin:22px auto 0;color:var(--ink-2);font-size:clamp(.96rem,1.6vw,1.06rem);
}

/* ---------- domain form ---------- */
.domain-form{
  max-width:660px;margin:34px auto 0;padding:18px;
  border:1px solid var(--card-line);border-radius:22px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.025));
  box-shadow:0 30px 70px -40px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.07);
  text-align:left;
}
.df-label{display:block;font-size:.78rem;letter-spacing:.12em;color:var(--ink-3);text-transform:uppercase;margin:0 0 8px 4px}
.df-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.df-prefix{font-family:var(--mono);color:var(--ink-3);font-size:.95rem;padding-left:6px}
#domainInput{
  flex:1 1 240px;min-width:0;
  font-family:var(--mono);font-size:1rem;color:var(--ink);
  background:rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.12);
  border-radius:12px;padding:13px 14px;outline:none;
  transition:border-color .18s,box-shadow .18s,background .18s;
}
#domainInput::placeholder{color:#5b6472}
#domainInput:focus{border-color:rgba(246,130,31,.75);box-shadow:0 0 0 4px rgba(246,130,31,.16);background:rgba(0,0,0,.5)}
#domainInput.invalid{border-color:rgba(255,107,107,.8);box-shadow:0 0 0 4px rgba(255,107,107,.14)}
.btn-primary{
  flex:0 0 auto;cursor:pointer;border:0;border-radius:12px;padding:13px 22px;
  font-size:.95rem;font-weight:650;color:#12161d;
  background:linear-gradient(160deg,var(--accent-2),var(--accent));
  box-shadow:0 14px 30px -14px rgba(246,130,31,.95);
  transition:transform .16s,filter .16s;
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(0)}
.df-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:11px 4px 0;font-size:.8rem}
.state{font-family:var(--mono)}
.state.ok{color:var(--ok)}
.state.bad{color:var(--bad)}
.df-tip{color:var(--ink-3)}
.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;list-style:none;padding:0;margin:24px 0 0}
.chips li{font-family:var(--mono);font-size:.78rem;color:var(--ink-2);
  border:1px dashed rgba(255,255,255,.14);border-radius:999px;padding:5px 12px;background:rgba(255,255,255,.02)}
.chips code{background:none;border:0;padding:0;color:inherit;font-size:1em}

/* ---------- sections ---------- */
.stack{margin-top:clamp(48px,7vw,86px)}
.section-head{max-width:660px;margin:0 0 20px}
.section-head h2{
  margin:0 0 8px;font-size:clamp(1.25rem,2.6vw,1.6rem);letter-spacing:-.02em;font-weight:680;
}
.section-head h2::first-letter{color:var(--accent-2)}
.section-head p{margin:0;color:var(--ink-2);font-size:.94rem}

.card{
  min-width:0;
  border:1px solid var(--card-line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.052),rgba(255,255,255,.02));
  padding:16px 18px 18px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.card-head h3{margin:0;font-size:.95rem;font-weight:640;letter-spacing:.01em;color:var(--ink)}
.btn-copy{
  cursor:pointer;font-size:.76rem;font-family:var(--mono);color:var(--ink-2);
  background:rgba(255,255,255,.05);border:1px solid var(--card-line);border-radius:9px;
  padding:5px 11px;transition:.16s;
}
.btn-copy:hover{color:#fff;border-color:rgba(246,130,31,.6);background:rgba(246,130,31,.14)}
.btn-copy.done{color:var(--ok);border-color:rgba(62,207,142,.5)}
.out{
  margin:0;padding:14px 15px;border-radius:12px;
  background:rgba(0,0,0,.42);border:1px solid rgba(255,255,255,.07);
  font-family:var(--mono);font-size:.83rem;line-height:1.72;color:#cfe0f5;
  white-space:pre-wrap;overflow-wrap:anywhere;tab-size:2;
}
.out code{background:none;border:0;padding:0;color:inherit;font-size:inherit}
.card-note{margin:10px 2px 0;font-size:.78rem;color:var(--ink-3)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px;align-items:start}
.grid2>*{min-width:0}
.out{max-width:100%}

.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid rgba(255,255,255,.07);background:rgba(0,0,0,.32)}
table.dns{width:100%;border-collapse:collapse;font-size:.82rem}
table.dns th,table.dns td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(255,255,255,.06);white-space:nowrap}
table.dns th{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-weight:600;background:rgba(255,255,255,.03)}
table.dns tr:last-child td{border-bottom:0}
table.dns td{font-family:var(--mono);color:#cfe0f5}
table.dns td.k{color:var(--accent-2)}
table.dns .tag{font-family:var(--mono);font-size:.72rem;color:var(--ink-2);
  border:1px solid var(--card-line);border-radius:999px;padding:2px 8px}

/* ---------- steps ---------- */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.steps li{
  position:relative;border:1px solid var(--card-line);border-radius:var(--radius);
  padding:20px 18px;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
}
.steps .num{
  font-family:var(--mono);font-size:.74rem;color:var(--accent-2);letter-spacing:.16em;
  display:block;margin-bottom:10px;
}
.steps h4{margin:0 0 6px;font-size:1rem;font-weight:640}
.steps p{margin:0;color:var(--ink-2);font-size:.86rem}

/* ---------- faq ---------- */
.faq{
  border:1px solid var(--card-line);border-radius:14px;padding:14px 18px;
  background:rgba(255,255,255,.03);margin-bottom:10px;
}
.faq summary{cursor:pointer;font-weight:600;font-size:.94rem;color:var(--ink);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"▸";color:var(--accent);margin-right:9px;display:inline-block;transition:transform .18s}
.faq[open] summary::before{transform:rotate(90deg)}
.faq p{margin:10px 0 2px;color:var(--ink-2);font-size:.88rem}

/* ---------- footer ---------- */
.foot{
  position:relative;z-index:1;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:26px clamp(18px,5vw,64px);border-top:1px solid rgba(255,255,255,.07);
  color:var(--ink-3);font-size:.82rem;background:rgba(0,0,0,.28);
}
.foot div{display:flex;align-items:center;gap:9px;font-family:var(--mono);color:var(--ink-2)}
.foot .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.foot p{margin:0}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);
  padding:11px 20px;border-radius:12px;font-size:.86rem;
  background:rgba(18,23,32,.96);color:var(--ink);border:1px solid rgba(255,255,255,.14);
  box-shadow:0 20px 50px -20px rgba(0,0,0,.9);
  opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;z-index:60;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media (max-width:860px){
  .grid2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .nav-links{display:none}
  .pill{display:none}
}
@media (max-width:520px){
  .df-row{gap:6px}
  .df-prefix{display:none}
  .btn-primary{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}