/* Theme */
:root{
  --bg:#F5F7FA;
  --card-bg:rgba(255,255,255,0.92);
  --border:rgba(0,0,0,0.08);
  --text:#0F172A;
  --muted:#475569;
  --primary:#2563EB;
  --success: #11a43f;
  --accent:#22D3EE;
  --accent2: #65e76e;
  --shadow:0 10px 30px rgba(0,0,0,0.12);
  --radius:16px;
  --gap:16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:
    radial-gradient(1200px 800px at 20% -20%, rgba(37,99,235,0.12), transparent 60%),
    radial-gradient(1000px 700px at 120% 120%, rgba(34,211,238,0.12), transparent 60%),
    var(--bg);
  color:var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.no-scroll{overflow:hidden}

/* Header */
.site-header{
  position:sticky; top:0; z-index:10;
  backdrop-filter:saturate(140%) blur(10px);
  background:linear-gradient(0deg, rgba(255,255,255,0.6), rgba(255,255,255,0.92));
  border-bottom:1px solid var(--border);
}
.brand{
  max-width:1200px; margin:0 auto; padding:12px var(--gap);
  display:flex; align-items:center; gap:12px;
}
.logo{width:36px;height:36px}
.brand-stack{display:flex; flex-direction:column; gap:2px}
.brand-name{font-weight:700; letter-spacing:0.2px}
.brand-tagline{font-size:12px; color:var(--muted)}

/* Banner (Redesign) */
.banner{
  position:relative;
  background:
    linear-gradient(90deg, rgba(37,99,235,0.18), rgba(34,211,238,0.18)),
    repeating-linear-gradient(135deg, rgba(0,0,0,0.035) 0 14px, rgba(0,0,0,0.02) 14px 28px);
  border-bottom: 1px solid var(--border);
}
.banner-inner{
  max-width:1200px; margin:0 auto; padding:14px var(--gap);
  display:flex; align-items:center; gap:14px; color:#0b1a34;
}
.banner-icon{
  flex:0 0 auto;
  width:40px; height:40px; border-radius:999px;
  display:grid; place-items:center;
  background: #fff;
  border:1px solid var(--border);
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
  color:#ef4444;
}
.banner-content h3{
  margin:0; font-size: 16px; font-weight:700; color:#0b1a34; letter-spacing:.2px;
}
.banner-content p{
  margin:2px 0 0; color:#264159;
}
@media (max-width: 640px){
  .banner-inner{ align-items:flex-start }
}

/* Container generic */
.container{ max-width:1200px; margin: 0 auto; padding: 0 var(--gap) }

/* Hero */
.hero{ margin: 24px 0 }
.hero-grid{
  display:grid; gap: var(--gap);
  grid-template-columns: 1fr;
}
@media (min-width: 980px){
  .hero-grid{ grid-template-columns: 1.2fr 0.8fr }
}
.card{
  background: var(--card-bg);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  backdrop-filter: blur(8px);
}
.hero-left h1{
  margin:0 0 10px; font-size: clamp(26px, 3vw, 40px);
}
.subtitle{ color: var(--muted); margin: 6px 0 12px }
.hero-points{ list-style:none; padding:0; margin:0; display:grid; gap:8px }
.hero-points li i{ color: var(--primary); margin-right:6px }
.hero-actions{ display:flex; gap:10px; flex-wrap:wrap; margin-top:10px }

/* Hero visual */
.visual{
  position:relative; overflow:hidden;
  display:grid; place-items:center;
  min-height:280px;
}
.visual-blob{
  position:absolute; width:520px; height:520px; border-radius:50%;
  background: radial-gradient(closest-side, rgba(37,99,235,0.18), transparent);
  filter: blur(10px);
  transform: translate(10%, -10%);
}
.visual-ring{
  position:absolute; width:360px; height:360px; border-radius:50%;
  border: 1.5px dashed rgba(34,211,238,0.35);
  animation: spin 16s linear infinite;
}
.visual-logo{
  width:120px; height:120px; z-index:1;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,0.15));
}
.visual-note{
  position:absolute; bottom:16px; left:50%; transform:translateX(-50%);
  color: var(--muted); font-size: 14px;
}
@keyframes spin{ to{ transform: rotate(360deg) } }

/* Info grid */
.info{ margin: 8px 0 24px }
.info-grid{
  display:grid; gap: var(--gap);
  grid-template-columns: 1fr;
}
@media (min-width: 980px){
  .info-grid{ grid-template-columns: 1fr 1fr }
}
.card h2{ margin:0 0 8px; font-size: clamp(18px, 2vw, 24px) }
.card p{ margin:0 }

/* Timeline */
.timeline{ margin: 8px 0 24px }
.timeline-title{ margin: 0 0 10px; padding: 0 var(--gap) }
.tl{
  position:relative;
  margin-left: 16px;
  padding-left: 16px;
}
.tl::before{
  content:""; position:absolute; left:0; top:0; bottom:0;
  width:2px; background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity:0.25;
}
.tl-item{ position:relative; margin: 16px 0 }
.tl-dot{
  position:absolute; left:-9px; top: 10px;
  width:12px; height:12px; border-radius:50%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.tl-card h3{ margin:0 0 6px; font-size: 18px }
.tl-card p{ margin:0; color: var(--muted) }

/* Contact */
.contact{ margin: 8px 0 32px }
.contact-card{ display:flex; flex-direction:column; gap:10px }
.contact-head .tip{ color: var(--muted); margin:4px 0 0 }
.contact-actions{ display:flex; gap:10px; flex-wrap:wrap }

/* Buttons */
.btn{
  appearance:none;
  border:1px solid var(--border);
  background: rgba(255,255,255,0.9);
  color:var(--text);
  padding:10px 14px;
  border-radius: 10px;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover{ transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,0.15) }
.btn.primary{
  border-color: transparent;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: #fff;
}
.btn.success {
  border-color: transparent;
  background: linear-gradient(90deg, var(--success), var(--accent2));
  color: #fff;
}
.icon-btn{
  position:absolute; top:10px; right:10px;
  border:none; background:rgba(255,255,255,0.92);
  color:var(--text); width:36px; height:36px;
  border-radius:10px; cursor:pointer;
  display:grid; place-items:center;
}

/* Footer */
.site-footer{
  margin: 32px 0;
  color: var(--muted);
  text-align:center;
}

/* Toast */
.toast{
  position: fixed; left:50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: rgba(255,255,255,0.96);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  border:1px solid var(--border);
  opacity:0; pointer-events:none;
  transition: opacity .25s ease, transform .25s ease;
}
.toast.show{ opacity: 1; transform: translateX(-50%) translateY(0) }

/* Modal */
.modal{ position: fixed; inset:0; display:none; }
.modal.show{ display:block; }
.modal-backdrop{
  position:absolute; inset:0; background: rgba(0,0,0,0.25); backdrop-filter: blur(4px);
}
.modal-content{
  position:absolute; inset:auto; left:50%; top:50%;
  transform: translate(-50%, -50%);
  width: min(92vw, 520px);
}
.weixin-img{
  display:block; width:100%; height:auto; border-radius: 12px; border:1px solid var(--border);
}
.modal-note{ margin-top:8px; color:var(--muted); text-align:center }

/* Accessibility */
button:focus-visible{ outline: 2px solid var(--accent); outline-offset: 2px }

/* Subscribe Form */
.subscribe{ margin: 8px 0 24px }
#subscribeForm{ display:block; margin-top: 8px }
#subscribeForm label{ font-weight:600; color: var(--text) }
#subscribeForm input[type="email"],
#subscribeForm input[type="text"]{
  width: 100%;
  margin: 6px 0 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04) inset;
}
#subscribeForm input::placeholder{ color: #9aa7b7 }
#subscribeForm button[type="submit"]{
  appearance:none;
  border: none;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color:#fff;
  padding:10px 16px;
  border-radius:10px;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .2s ease;
}
#subscribeForm button[type="submit"]:hover{
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}