:root{
  --bg: #0b0f16;
  --bg2: #0e1420;
  --panel: rgba(255,255,255,.06);
  --panel2: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.88);
  --muted: rgba(255,255,255,.62);
  --muted2: rgba(255,255,255,.46);
  --brand: #69d2ff;
  --brand2: #7c5cff;
  --ok: #39d98a;
  --warn: #ffcf5a;
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --radius: 16px;
  --radius2: 22px;
  --container: 1120px;
  --ring: 0 0 0 3px rgba(105,210,255,.25);
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f7f9fc;
    --bg2: #ffffff;
    --panel: rgba(12,22,38,.04);
    --panel2: rgba(12,22,38,.06);
    --border: rgba(12,22,38,.12);
    --text: rgba(12,22,38,.92);
    --muted: rgba(12,22,38,.66);
    --muted2: rgba(12,22,38,.52);
    --shadow: 0 18px 60px rgba(12,22,38,.12);
    --ring: 0 0 0 3px rgba(105,210,255,.20);
  }
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: Inter, "Noto Sans SC", system-ui, -apple-system, Segoe UI, Roboto, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 20% -10%, rgba(105,210,255,.22), transparent 55%),
    radial-gradient(900px 600px at 85% 10%, rgba(124,92,255,.20), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }
img{ max-width: 100%; display: block; }

.container{
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.sr-only{
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.skip-link{
  position: absolute;
  left: 14px;
  top: -44px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0,0,0,.75);
  color: #fff;
  z-index: 9999;
}
.skip-link:focus{ top: 14px; box-shadow: var(--ring); }

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10,14,22,.55);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: light){
  .site-header{ background: rgba(255,255,255,.72); }
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand.small{ gap: 10px; }
.brand-mark{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background:
    radial-gradient(10px 10px at 30% 30%, rgba(255,255,255,.85), transparent 60%),
    linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 12px 26px rgba(105,210,255,.18);
}
.brand-text{
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-text strong{ font-weight: 700; letter-spacing: .2px; }
.brand-text small{ color: var(--muted); font-weight: 500; }

.nav{ display: flex; align-items: center; }
.nav-menu{
  display: flex;
  align-items: center;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu a{
  padding: 10px 10px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.nav-menu a:hover{
  color: var(--text);
  background: var(--panel);
  text-decoration: none;
}
.nav-toggle{
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
}
.nav-toggle:focus-visible{ outline: none; box-shadow: var(--ring); }
.nav-toggle-icon{
  width: 18px;
  height: 12px;
  display: inline-block;
  background:
    linear-gradient(var(--text), var(--text)) 0 0/100% 2px no-repeat,
    linear-gradient(var(--text), var(--text)) 0 50%/100% 2px no-repeat,
    linear-gradient(var(--text), var(--text)) 0 100%/100% 2px no-repeat;
  opacity: .9;
}

/* Hero */
.hero{
  padding: 62px 0 26px;
}
.hero-inner{
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 28px;
  align-items: stretch;
}
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 10px;
}
.eyebrow::before{
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 0 0 4px rgba(105,210,255,.12);
}

h1{
  margin: 0 0 12px;
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.lead{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
  max-width: 58ch;
}
.hero-actions{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 14px 0 18px;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 11px 14px;
  border-radius: 14px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}
.btn:hover{ background: var(--panel2); text-decoration: none; }
.btn:focus-visible{ outline: none; box-shadow: var(--ring); }
.btn.primary{
  background: linear-gradient(135deg, rgba(105,210,255,.95), rgba(124,92,255,.95));
  border-color: transparent;
  color: rgba(10,14,22,.92);
}
.btn.primary:hover{ filter: brightness(1.02); }
.btn.ghost{
  background: transparent;
}
.btn.small{ padding: 9px 12px; border-radius: 12px; font-weight: 700; }

.hero-badges{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.hero-badges li{
  padding: 8px 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
}

.hero-card{
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background:
    radial-gradient(700px 280px at 40% -10%, rgba(105,210,255,.18), transparent 60%),
    radial-gradient(650px 260px at 100% 0%, rgba(124,92,255,.16), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.stat-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.stat{
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  padding: 12px 12px;
}
.stat-k{
  display: block;
  color: var(--muted2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.stat-v{
  display: block;
  margin-top: 4px;
  font-weight: 700;
}
.hero-note{
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,.22);
  background: rgba(255,255,255,.02);
  padding: 12px 12px;
  color: var(--muted);
  font-size: 13px;
}
.hero-note p{ margin: 0; }

/* Sections */
.section{
  padding: 54px 0;
}
.section.alt{
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.section-head{
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}
.section-head h2{
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.01em;
}
.section-head p{
  margin: 0;
  color: var(--muted);
  max-width: 78ch;
}

.grid{
  display: grid;
  gap: 16px;
}
.grid.two{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three{ grid-template-columns: repeat(3, minmax(0, 1fr)); }

.panel, .feature, .scenario, .card{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding: 18px;
}
.panel h3, .feature h3, .scenario h3, .card h3{
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.panel p, .feature p, .scenario p, .card p{ margin: 0; color: var(--muted); }

.list{
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li{ margin: 6px 0; }
.list.compact{ margin-top: 10px; }
.muted{ color: var(--muted); }

/* Product toolbar */
.product-toolbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 18px 0 14px;
}
.segmented{
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
}
.seg{
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  padding: 9px 12px;
  border-radius: 14px;
  font-weight: 800;
  cursor: pointer;
}
.seg:hover{ color: var(--text); background: rgba(255,255,255,.04); }
.seg.active{
  color: rgba(10,14,22,.92);
  background: linear-gradient(135deg, rgba(105,210,255,.92), rgba(124,92,255,.92));
}
.seg:focus-visible{ outline: none; box-shadow: var(--ring); }

.search input{
  width: min(360px, 72vw);
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  color: var(--text);
}
.search input::placeholder{ color: var(--muted2); }
.search input:focus{ outline: none; box-shadow: var(--ring); }

/* Product cards */
.products .card{
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 240px;
}
.card-top .muted{ margin-top: 2px; }
.spec{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.spec li{ margin: 6px 0; }
.card-foot{ margin-top: auto; display: flex; gap: 10px; }
.empty{
  margin-top: 14px;
  border: 1px dashed rgba(255,255,255,.22);
  border-radius: var(--radius);
  padding: 16px;
  color: var(--muted);
}

/* Flow */
.flow{
  margin-top: 18px;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background:
    radial-gradient(720px 260px at 10% 0%, rgba(105,210,255,.10), transparent 60%),
    radial-gradient(720px 260px at 95% 0%, rgba(124,92,255,.10), transparent 60%),
    rgba(255,255,255,.02);
  padding: 18px;
}
.flow-head{ display: grid; gap: 4px; margin-bottom: 12px; }
.flow-head h3{ margin: 0; font-size: 18px; }
.steps{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}
.steps li{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: 14px;
  padding: 12px;
  display: grid;
  gap: 6px;
  min-height: 84px;
}
.steps strong{ font-size: 14px; }
.steps span{ color: var(--muted); font-size: 13px; }

/* Form */
.form{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding: 18px;
}
.field{ display: grid; gap: 8px; margin-bottom: 12px; }
.field label{ font-weight: 800; font-size: 14px; color: var(--text); }
.field input, .field textarea{
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  color: var(--text);
}
.field textarea{ resize: vertical; min-height: 120px; }
.field input::placeholder, .field textarea::placeholder{ color: var(--muted2); }
.field input:focus, .field textarea:focus{ outline: none; box-shadow: var(--ring); }
.hint{
  min-height: 18px;
  color: rgba(255,120,120,.92);
  font-weight: 700;
  font-size: 13px;
}
.form-actions{ display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.fineprint{
  margin: 12px 0 0;
  color: var(--muted2);
  font-size: 12px;
}

.contact-panel .contact-list{
  display: grid;
  gap: 10px;
  margin-top: 12px;
}
.contact-item{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  border-radius: 14px;
  padding: 12px;
}
.contact-item span{ color: var(--muted); font-weight: 700; }
.contact-item strong{ font-weight: 800; }
.divider{ height: 1px; background: var(--border); margin: 14px 0; }

/* Footer */
.site-footer{
  border-top: 1px solid var(--border);
  padding-top: 18px;
}
.footer-inner{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0 18px;
}
.footer-left{ max-width: 70ch; }
.footer-right{ display: flex; align-items: center; gap: 10px; }
.sep{ color: var(--muted2); }

.beian{
  border-top: 1px solid rgba(255,255,255,.06);
  background: rgba(0,0,0,.12);
}
@media (prefers-color-scheme: light){
  .beian{ background: rgba(12,22,38,.04); }
}
.beian-inner{
  padding: 12px 0;
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
}
.beian a{
  color: var(--text);
  font-weight: 800;
}

/* Modal */
.modal{
  border: none;
  padding: 0;
  background: transparent;
}
.modal::backdrop{
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(6px);
}
.modal-card{
  width: min(520px, calc(100vw - 30px));
  margin: 10vh auto;
  border: 1px solid var(--border);
  /* background:
    radial-gradient(700px 260px at 20% 0%, rgba(105,210,255,.14), transparent 60%),
    radial-gradient(700px 260px at 100% 0%, rgba(124,92,255,.12), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02)); */
    /* 主题白色 */
    background: #ffffff;
    
    
  border-radius: var(--radius2);
  box-shadow: var(--shadow);
  padding: 14px;
}
.modal-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 6px 10px;
}
.modal-head h3{ margin: 0; font-size: 18px; }
.icon-btn{
  width: 36px; height: 36px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
}
.icon-btn:hover{ background: rgba(255,255,255,.05); }
.icon-btn:focus-visible{ outline: none; box-shadow: var(--ring); }
.modal-body{ padding: 2px 6px 8px; color: var(--muted); }
.modal-foot{ padding: 6px; display: flex; justify-content: flex-end; }

/* Responsive */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .grid.three{ grid-template-columns: 1fr; }
  .grid.two{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .footer-inner{ flex-direction: column; align-items: flex-start; }
}

@media (max-width: 760px){
  .nav-toggle{ display: inline-flex; }
  .nav-menu{
    position: absolute;
    right: 20px;
    top: 62px;
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
    padding: 10px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: rgba(10,14,22,.88);
    box-shadow: var(--shadow);
    display: none;
  }
  @media (prefers-color-scheme: light){
    .nav-menu{ background: rgba(255,255,255,.92); }
  }
  .nav-menu.open{ display: flex; }
  .nav-menu a{ padding: 10px 12px; }
}