/*
Theme Name: DenbaPlus Domain Landing
Theme URI: https://www.denbaplus.com/
Author: DENBAplus.com
Description: Premium domain-for-sale landing page theme for DENBAplus.com. Deep-navy cold-chain aesthetic, bilingual ZH/EN toggle, system font stack, Customizer-editable contact email and domain name, llms.txt served via rewrite rule.
Version: 1.0.0
License: GNU General Public License v2 or later
Text Domain: denbaplus
*/

:root{
  --bg:#081226;
  --panel:#0C1B38;
  --card:#112448;
  --ink:#EAF2FB;
  --muted:#8FA6C7;
  --accent:#4C8DFF;
  --accent-deep:#8AB4FF;
  --brand:#2563EB;
  --line:rgba(234,242,251,.14);
  --radius:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Helvetica,Arial,"PingFang TC","Microsoft JhengHei",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent-deep);text-decoration:none}
.container{max-width:1080px;margin:0 auto;padding:0 24px}

/* ===== Top bar ===== */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(8,18,38,.8);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.wordmark{font-size:1.15rem;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.wordmark .plus{color:var(--accent)}
.wordmark .tld{color:var(--muted);font-weight:300}
.badge{
  display:inline-flex;align-items:center;gap:.45em;
  font-size:.78rem;font-weight:700;letter-spacing:.08em;
  color:var(--accent-deep);
  border:1px solid var(--accent);
  border-radius:999px;padding:.35em 1em;
  background:rgba(76,141,255,.12);
}
.badge .dot{width:.5em;height:.5em;border-radius:50%;background:var(--accent);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:110px 0 130px;text-align:center}
.hero-plus{
  position:absolute;left:50%;top:50%;
  width:520px;height:520px;
  transform:translate(-50%,-52%);
  pointer-events:none;z-index:0;
  animation:breathe 7s ease-in-out infinite;
}
.hero-plus::before,.hero-plus::after{
  content:"";position:absolute;left:50%;top:50%;
  background:linear-gradient(180deg,rgba(76,141,255,.22),rgba(76,141,255,.06));
  border-radius:40px;
  transform:translate(-50%,-50%);
  filter:blur(2px);
}
.hero-plus::before{width:130px;height:100%}
.hero-plus::after{width:100%;height:130px}
@keyframes breathe{0%,100%{opacity:.75;transform:translate(-50%,-52%) scale(1)}50%{opacity:1;transform:translate(-50%,-52%) scale(1.04)}}
.hero .container{position:relative;z-index:1}
.eyebrow{
  font-size:.8rem;font-weight:700;letter-spacing:.28em;
  color:var(--accent-deep);text-transform:uppercase;margin-bottom:26px;
}
.hero h1{
  font-size:clamp(2.6rem,7.5vw,5rem);
  font-weight:800;letter-spacing:-.035em;line-height:1.08;
}
.hero h1 .plus{color:var(--accent)}
.hero h1 .tld{color:var(--muted);font-weight:300}
.hero .lede{
  max-width:640px;margin:28px auto 0;
  font-size:1.12rem;color:var(--muted);
}
.hero .cta-row{margin-top:44px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-block;font-weight:700;font-size:1rem;
  padding:.85em 2.1em;border-radius:999px;transition:transform .18s ease,box-shadow .18s ease;
  border:none;cursor:pointer;font-family:inherit;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(37,99,235,.45)}
.btn-ghost{border:1.5px solid var(--line);color:var(--ink);background:var(--card)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep)}

/* ===== Sections ===== */
section{padding:88px 0}
.section-alt{background:var(--panel)}
.kicker{font-size:.78rem;font-weight:700;letter-spacing:.24em;color:var(--accent-deep);text-transform:uppercase;margin-bottom:14px}
h2{font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:800;letter-spacing:-.02em;line-height:1.25;margin-bottom:18px}
.section-lede{max-width:660px;color:var(--muted);font-size:1.05rem}

.grid{display:grid;gap:22px;margin-top:48px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:32px 28px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(0,0,0,.45)}
.card .mark{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(76,141,255,.16);color:var(--accent-deep);
  font-size:1.3rem;font-weight:800;margin-bottom:18px;
}
.card h3{font-size:1.12rem;font-weight:800;margin-bottom:10px;letter-spacing:-.01em}
.card p{color:var(--muted);font-size:.96rem}

/* offer cards */
.offer-tag{font-size:.75rem;font-weight:700;letter-spacing:.14em;color:var(--accent-deep);text-transform:uppercase}
.offer h3{font-size:1.35rem;margin:.4em 0 .5em}
.offer ul{list-style:none;margin-top:16px}
.offer li{padding-left:1.4em;position:relative;color:var(--muted);font-size:.95rem;margin-bottom:.55em}
.offer li::before{content:"＋";position:absolute;left:0;color:var(--accent);font-weight:800}

/* FAQ */
details{
  background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:20px 26px;margin-bottom:14px;
}
details summary{cursor:pointer;font-weight:700;font-size:1.02rem;list-style:none;position:relative;padding-right:2em}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"＋";position:absolute;right:0;top:0;color:var(--accent);font-weight:800;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin-top:12px;color:var(--muted);font-size:.96rem}

/* Contact */
.contact-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:44px;margin-top:44px;align-items:start}
.contact-info p{color:var(--muted);margin-bottom:14px}
.contact-info .email{font-size:1.15rem;font-weight:800;color:var(--ink)}
form .field{margin-bottom:18px}
label{display:block;font-size:.85rem;font-weight:700;margin-bottom:.45em}
input,select,textarea{
  width:100%;padding:.8em 1em;border:1.5px solid var(--line);border-radius:12px;
  font:inherit;background:var(--card);color:var(--ink);
}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
textarea{min-height:130px;resize:vertical}
.form-note{font-size:.85rem;color:var(--muted);margin-top:12px}
#form-status{margin-top:14px;font-weight:700;font-size:.95rem;color:var(--accent-deep);display:none}

/* Footer */
footer{border-top:1px solid var(--line);padding:44px 0 56px;background:var(--panel)}
footer .container{display:flex;flex-direction:column;gap:14px;align-items:center;text-align:center}
footer .fine{font-size:.82rem;color:var(--muted);max-width:640px}
footer .llms a{font-size:.85rem;color:var(--accent-deep);font-weight:700}

/* Reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
@media (max-width:860px){
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .contact-wrap{grid-template-columns:1fr}
  .hero{padding:80px 0 96px}
  .hero-plus{width:340px;height:340px}
  .hero-plus::before{width:88px}
  .hero-plus::after{height:88px}
  section{padding:64px 0}
}

/* Language toggle */
body:not(.en) .lang-en{display:none!important}
body.en .lang-zh{display:none!important}
.lang-toggle{
  font:inherit;font-size:.82rem;font-weight:700;letter-spacing:.06em;
  color:var(--ink);background:var(--card);border:1.5px solid var(--line);
  border-radius:999px;padding:.4em 1.1em;cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.lang-toggle:hover{border-color:var(--accent);color:var(--accent-deep)}
.topbar-right{display:flex;align-items:center;gap:12px}
@media (max-width:640px){.badge{display:none}}