:root, [data-theme="dark"] {
  --bg: #070b12;
  --bg-elev: #0d1522;
  --text: #e8eef7;
  --muted: #93a4bd;
  --accent: #3de0c5;
  --accent-2: #5b8cff;
  --line: rgba(148, 178, 210, 0.16);
  --card: rgba(15, 24, 38, 0.72);
  --shadow: 0 30px 80px rgba(0,0,0,.35);
  --banner: rgba(255, 80, 70, 0.12);
  --banner-text: #ffb4a8;
  --banner-border: rgba(255,140,120,0.35);
  --orb-a: rgba(61,224,197,.18);
  --orb-b: rgba(91,140,255,.20);
  --orb-c: rgba(255,143,107,.12);
  --panel-scrim: linear-gradient(180deg, rgba(7,11,18,.25), rgba(7,11,18,.82));
  --logo-chip: rgba(255,255,255,.03);
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #f4f7fb;
  --bg-elev: #ffffff;
  --text: #122033;
  --muted: #5b6b82;
  --accent: #0f9f8a;
  --accent-2: #3b6ef5;
  --line: rgba(30, 55, 90, 0.12);
  --card: rgba(255,255,255,.82);
  --shadow: 0 24px 50px rgba(40,70,110,.10);
  --banner: #fff1f0;
  --banner-text: #cf1322;
  --banner-border: #ffccc7;
  --orb-a: rgba(15,159,138,.16);
  --orb-b: rgba(59,110,245,.14);
  --orb-c: rgba(255,143,107,.12);
  --panel-scrim: linear-gradient(180deg, rgba(255,255,255,.15), rgba(244,247,251,.88));
  --logo-chip: #fff;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  min-height: 100vh;
  transition: background .35s ease, color .35s ease;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.fx-bg { position: fixed; inset: 0; pointer-events: none; z-index: -1; overflow: hidden; }
.fx-bg .grid-fade {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 70%);
  opacity: .35;
}
.orb {
  position: absolute; border-radius: 50%; filter: blur(40px);
  animation: floaty 12s ease-in-out infinite;
}
.orb-a { width: 420px; height: 420px; background: var(--orb-a); top: -80px; right: -60px; }
.orb-b { width: 360px; height: 360px; background: var(--orb-b); top: 20%; left: -120px; animation-delay: -4s; }
.orb-c { width: 280px; height: 280px; background: var(--orb-c); bottom: 10%; right: 18%; animation-delay: -7s; }
@keyframes floaty {
  0%,100% { transform: translate3d(0,0,0) scale(1); }
  50% { transform: translate3d(20px,-28px,0) scale(1.08); }
}

.top {
  max-width: 1120px; margin: 0 auto; padding: 22px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img {
  border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(61,224,197,.25), 0 10px 30px rgba(0,0,0,.18);
}
.brand strong { display: block; font-size: 16px; }
.brand small { color: var(--muted); font-size: 12px; }
nav { display: flex; align-items: center; gap: 14px; font-size: 14px; color: var(--muted); }
nav a:hover { color: var(--text); }
.nav-cta, .theme-btn {
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--logo-chip); color: var(--text);
}
.theme-btn {
  cursor: pointer; width: 40px; height: 36px; padding: 0;
  display: grid; place-items: center; transition: .2s ease;
}
.theme-btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
[data-theme="dark"] .icon-sun { display: inline; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: inline; }

main { max-width: 1120px; margin: 0 auto; padding: 8px 24px 72px; }

.hero {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 28px;
  align-items: stretch; padding: 28px 0 18px;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent); font-size: 12px; font-weight: 700;
}
.pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent);
  animation: ping 1.8s ease-out infinite;
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 50%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
h1 {
  margin: 0 0 18px; font-size: clamp(36px, 5vw, 56px);
  line-height: 1.15; letter-spacing: -1.5px; font-weight: 780;
}
.grad {
  background: linear-gradient(120deg, var(--accent), #9af0ff 40%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
[data-theme="light"] .grad {
  background: linear-gradient(120deg, #0c8f7c, #3b6ef5 55%, #ff7a59);
  -webkit-background-clip: text; background-clip: text;
}
.lead { margin: 0 0 26px; max-width: 40rem; color: var(--muted); font-size: 16px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 18px; border-radius: 12px;
  font-size: 14px; font-weight: 700; transition: .18s ease;
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041018; box-shadow: 0 12px 30px color-mix(in srgb, var(--accent) 28%, transparent);
}
[data-theme="light"] .btn.primary { color: #fff; }
.btn.primary:hover { transform: translateY(-2px) scale(1.01); }
.btn.ghost { border: 1px solid var(--line); background: color-mix(in srgb, var(--text) 3%, transparent); }
.btn.ghost:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--text) 28%, var(--line)); }
.btn.link { color: var(--accent); padding: 0 6px; min-height: auto; }

.trust-row { margin-top: 28px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.trust-row div, .card-lift, .grid-3 article, .steps > div {
  padding: 14px; border: 1px solid var(--line); border-radius: 14px;
  background: color-mix(in srgb, var(--text) 2.5%, transparent);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.trust-row em { display: block; font-style: normal; font-weight: 750; font-size: 13px; margin-bottom: 4px; }
.trust-row span { color: var(--muted); font-size: 12px; }
.card-lift:hover, .grid-3 article:hover, .steps > div:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.hero-panel {
  position: relative; border-radius: 26px; border: 1px solid var(--line);
  overflow: hidden; min-height: 420px; padding: 22px;
  display: flex; flex-direction: column; gap: 14px;
  background:
    var(--panel-scrim),
    url("/brand-assets/hero-mesh.jpg") center/cover no-repeat;
  box-shadow: var(--shadow);
}
.panel-glow {
  position: absolute; inset: -20%;
  background: radial-gradient(circle at 70% 30%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 45%);
  animation: glowshift 8s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes glowshift {
  from { transform: translate(-2%, -2%) scale(1); opacity: .7; }
  to { transform: translate(4%, 3%) scale(1.08); opacity: 1; }
}
.panel-card, .panel-list { position: relative; z-index: 1; }
.panel-card {
  margin-top: auto; padding: 16px; border-radius: 16px;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border: 1px solid var(--line); backdrop-filter: blur(10px);
}
.panel-kicker { margin: 0 0 8px; font-size: 11px; letter-spacing: 1.6px; color: var(--accent); font-weight: 750; }
.panel-card code { display: block; font-size: 14px; margin-bottom: 8px; }
.panel-note { margin: 0; color: var(--muted); font-size: 12px; }
.panel-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.panel-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 12px 14px; border-radius: 14px;
  background: color-mix(in srgb, var(--bg) 66%, transparent);
  border: 1px solid var(--line); backdrop-filter: blur(8px);
}
.panel-list strong { font-size: 13px; }
.panel-list span { color: var(--muted); font-size: 12px; text-align: right; }

.strip {
  margin: 34px 0 10px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: color-mix(in srgb, var(--text) 2%, transparent);
}
.strip p { margin: 0; color: var(--muted); font-size: 13px; }
.logos { display: flex; flex-wrap: wrap; gap: 10px; }
.logos span {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 12px; font-weight: 650;
}

.sec { margin-bottom: 18px; }
.kicker { margin: 0 0 8px; color: var(--accent); font-size: 12px; font-weight: 750; letter-spacing: 1px; }
h2 { margin: 0; font-size: clamp(24px, 3vw, 34px); letter-spacing: -.8px; line-height: 1.25; }
.muted { color: var(--muted); }

.grid-3 { margin-top: 54px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.grid-3 .sec { grid-column: 1 / -1; }
.grid-3 article { padding: 22px; border-radius: 18px; }
.grid-3 h3 { margin: 0 0 10px; font-size: 17px; }
.grid-3 p { margin: 0; color: var(--muted); font-size: 14px; }

.rules {
  margin-top: 54px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; padding: 28px;
  border-radius: 24px; border: 1px solid var(--line);
  background:
    radial-gradient(600px 240px at 100% 0%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 50%),
    color-mix(in srgb, var(--text) 2%, transparent);
}
.rules ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.rules li {
  display: grid; grid-template-columns: 48px 1fr; gap: 12px; align-items: start;
  padding: 14px; border-radius: 16px; background: color-mix(in srgb, var(--bg) 55%, transparent);
  border: 1px solid var(--line);
}
.rules li span {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent);
  font-size: 12px; font-weight: 800;
}
.rules strong { display: block; margin-bottom: 4px; }
.rules p { margin: 0; color: var(--muted); font-size: 13px; }

.start { margin-top: 54px; }
.steps { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.steps > div { padding: 22px; border-radius: 18px; }
.steps span {
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 9px;
  background: color-mix(in srgb, var(--accent-2) 16%, transparent); font-size: 12px; font-weight: 800; margin-bottom: 12px;
}
.steps h3 { margin: 0 0 8px; font-size: 16px; }
.steps p { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.steps a { color: var(--accent); font-size: 13px; font-weight: 700; }

.cta-band {
  margin-top: 54px; padding: 28px; border-radius: 24px;
  display: flex; justify-content: space-between; gap: 18px; align-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  background: linear-gradient(120deg, color-mix(in srgb, var(--accent) 14%, transparent), color-mix(in srgb, var(--accent-2) 14%, transparent));
}
.cta-band h2 { margin: 0 0 8px; font-size: 28px; }
.cta-band p { margin: 0; color: var(--muted); }

footer {
  max-width: 1120px; margin: 0 auto; padding: 10px 24px 48px;
  display: grid; gap: 16px; border-top: 1px solid var(--line);
}
.foot-brand { display: flex; gap: 12px; align-items: center; }
.foot-brand img { border-radius: 8px; }
.foot-brand p { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.foot-links { display: flex; gap: 16px; color: var(--muted); font-size: 13px; flex-wrap: wrap; }
.copy { margin: 0; color: var(--muted); font-size: 12px; opacity: .9; }
.copy a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }

details.agreement {
  width: 100%; margin: 0 0 8px; border: 1px solid var(--line); border-radius: 16px;
  background: color-mix(in srgb, var(--text) 2.5%, transparent); overflow: hidden;
}
details.agreement > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 14px 18px; font-size: 14px; font-weight: 700;
}
details.agreement > summary::-webkit-details-marker { display: none; }
details.agreement .agr-arrow::after { content: "展开阅读 ▾"; color: var(--muted); font-size: 12px; font-weight: 600; }
details.agreement[open] .agr-arrow::after { content: "收起 ▴"; }
.agreement .disclaimer {
  max-height: 56vh; overflow-y: auto; padding: 0 18px 18px;
  border-top: 1px solid var(--line); font-size: 12.5px; line-height: 1.65; color: var(--muted);
}
.agreement .disclaimer .dz-banner {
  margin: 14px 0 12px; padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--banner-border); background: var(--banner); color: var(--banner-text);
  font-weight: 800; font-size: 13px; text-align: center;
}
.agreement .disclaimer .dz-meta { font-size: 11px; opacity: .85; margin: 0 0 10px; }
.agreement .disclaimer h3 { font-size: 13px; color: var(--text); margin: 14px 0 6px; font-weight: 750; }
.agreement .disclaimer p { margin: 6px 0; }
.agreement .disclaimer .dz-sign { margin: 16px 0 2px; text-align: right; color: var(--text); font-weight: 650; }

/* scroll / entrance motion */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .orb, .panel-glow, .pulse, .btn { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 920px) {
  .hero, .rules { grid-template-columns: 1fr; }
  .cta-band { display: grid; }
  .grid-3, .steps, .trust-row { grid-template-columns: 1fr; }
  nav a:not(.nav-cta) { display: none; }
  .strip { flex-direction: column; align-items: flex-start; }
  .hero-panel { min-height: 340px; }
}

/* Hide site chrome when embedded in New API home iframe */
html.bx-embedded .top { display: none !important; }
html.bx-embedded body { padding-top: 0; }