/* 波函数风 · 柔和波纹与概率云 · 量子智能视觉 */
:root {
  --quantum: #7C4DFF;
  --quantum-light: #B388FF;
  --quantum-dim: rgba(124, 77, 255, 0.22);
  --psi: #40C4FF;
  --psi-dim: rgba(64, 196, 255, 0.2);
  --void: #0D0A1F;
  --void-deep: #080614;
  --void-mid: #161230;
  --text: #EDEAFA;
  --text-dim: rgba(237, 234, 250, 0.6);
  --radius: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--void-deep);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== 顶部 Logo + 主导航 ===== */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8, 6, 20, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--quantum-dim);
  padding: 0 24px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 40px; height: 40px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--quantum-dim), 0 0 16px rgba(124,77,255,0.45);
}
.brand-name {
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--text);
}
.brand-name em {
  font-style: normal;
  background: linear-gradient(90deg, var(--quantum-light), var(--psi));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.mainnav { display: flex; align-items: center; gap: 26px; }
.mainnav a {
  color: var(--text-dim);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
  padding: 4px 2px;
}
.mainnav a:hover, .mainnav a.active { color: var(--quantum-light); }
.mainnav a.active::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 20%; right: 20%;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, transparent, var(--quantum-light), transparent);
}
.btn-api {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--quantum) 0%, var(--psi) 100%);
  color: #FFFFFF !important;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s ease;
}
.btn-api::after { display: none !important; }
.btn-api:hover { box-shadow: 0 0 24px rgba(124,77,255,0.55); transform: scale(1.04); }

/* ===== 首屏：波函数 ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 24px 100px;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--void-mid) 0%, var(--void-deep) 70%);
}
#wave-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.hero-inner {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  text-align: center;
}
.announce {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(22,18,48,0.8);
  border: 1px solid var(--quantum-dim);
  border-radius: 999px;
  padding: 8px 22px;
  font-size: 0.875rem;
  color: var(--quantum-light);
  margin-bottom: 32px;
  backdrop-filter: blur(6px);
}
.announce-dot {
  width: 8px; height: 8px;
  background: var(--psi);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--psi);
  animation: breathe 2.4s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 18px;
  color: var(--text);
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--quantum-light), var(--psi));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 1.125rem;
  color: var(--text-dim);
  margin-bottom: 48px;
}
.hero-cards {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.card {
  width: 300px;
  padding: 34px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex; flex-direction: column; gap: 12px;
  position: relative;
  text-align: left;
  overflow: hidden;
}
.card:hover { transform: translateY(-6px); }
.card-primary {
  background: linear-gradient(135deg, var(--quantum) 0%, #5E35B1 100%);
  color: #FFFFFF;
  box-shadow: 0 12px 40px rgba(124,77,255,0.35);
}
.card-primary:hover { box-shadow: 0 16px 52px rgba(124,77,255,0.5); }
.card-primary::after {
  content: '';
  position: absolute;
  bottom: -30px; right: -30px;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(64,196,255,0.35) 0%, transparent 70%);
  border-radius: 50%;
}
.card-secondary {
  background: rgba(22,18,48,0.75);
  border: 1px solid var(--quantum-dim);
  color: var(--text);
  backdrop-filter: blur(8px);
}
.card-secondary:hover { border-color: var(--quantum-light); box-shadow: 0 12px 36px rgba(124,77,255,0.22); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 4px;
}
.card-primary .card-icon { background: rgba(255,255,255,0.16); }
.card-secondary .card-icon { background: var(--quantum-dim); }
.card-title { font-size: 1.1875rem; font-weight: 700; }
.card-desc { font-size: 0.875rem; opacity: 0.88; line-height: 1.5; }
.card-wave {
  margin-top: 8px;
  height: 20px;
  position: relative;
  overflow: hidden;
}
.card-wave svg { width: 100%; height: 100%; }

/* ===== 两栏布局 ===== */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.content-main { min-width: 0; }
.sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-box {
  border: 1px solid var(--quantum-dim);
  border-radius: var(--radius);
  padding: 24px;
  background: rgba(22,18,48,0.55);
  backdrop-filter: blur(6px);
}
.side-box h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--quantum-dim);
  color: var(--quantum-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-box ul { list-style: none; }
.side-box li { margin-bottom: 10px; }
.side-box a {
  font-size: 0.875rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.side-box a:hover { color: var(--psi); }
/* 边栏概率云面板 */
.psi-box { text-align: center; }
.psi-cloud {
  width: 130px; height: 130px;
  margin: 0 auto 16px;
  border-radius: 50%;
  position: relative;
  background:
    radial-gradient(circle at 35% 35%, rgba(124,77,255,0.5) 0%, transparent 50%),
    radial-gradient(circle at 65% 60%, rgba(64,196,255,0.4) 0%, transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(179,136,255,0.25) 0%, transparent 70%);
  border: 1px solid var(--quantum-dim);
  display: flex; align-items: center; justify-content: center;
  animation: cloudDrift 6s ease-in-out infinite;
}
@keyframes cloudDrift {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.psi-cloud span {
  font-family: 'Consolas', monospace;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-shadow: 0 0 16px rgba(124,77,255,0.8);
}
.psi-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  padding: 8px 0;
  border-bottom: 1px dashed var(--quantum-dim);
  text-align: left;
}
.psi-row:last-child { border-bottom: none; }
.psi-val { font-weight: 700; color: var(--psi); }

/* 波函数风内容区块 */
.section-block { margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: var(--quantum-dim);
  color: var(--quantum-light);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}
.section-desc {
  color: var(--text-dim);
  margin-bottom: 32px;
}

/* 量子态卡片 */
.q-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.q-card {
  border: 1px solid var(--quantum-dim);
  border-radius: var(--radius);
  padding: 28px;
  background: rgba(22,18,48,0.55);
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
}
.q-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 120px; height: 120px;
  background: radial-gradient(circle, var(--quantum-dim) 0%, transparent 70%);
  border-radius: 50%;
  transition: transform 0.3s;
}
.q-card:hover::before { transform: scale(1.6); }
.q-card:hover {
  border-color: var(--quantum-light);
  box-shadow: 0 12px 36px rgba(124,77,255,0.2);
  transform: translateY(-4px);
}
.q-icon {
  width: 54px; height: 54px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  background: var(--quantum-dim);
  box-shadow: 0 0 20px rgba(124,77,255,0.25);
  position: relative;
  z-index: 1;
}
.q-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 8px; color: var(--text); position: relative; z-index: 1; }
.q-desc { font-size: 0.875rem; color: var(--text-dim); line-height: 1.6; position: relative; z-index: 1; }

/* 能级跃迁图 */
.level-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.level {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  border-radius: 999px;
  border: 1px solid var(--quantum-dim);
  background: rgba(22,18,48,0.55);
  transition: all 0.25s;
}
.level:hover { border-color: var(--quantum-light); transform: translateX(6px); box-shadow: 0 4px 20px rgba(124,77,255,0.15); }
.level-orb {
  width: 42px; height: 42px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 0.8125rem;
  font-family: 'Consolas', monospace;
  color: #FFFFFF;
}
.level:nth-child(1) .level-orb { background: radial-gradient(circle at 35% 35%, var(--psi), #0277BD); box-shadow: 0 0 14px rgba(64,196,255,0.5); }
.level:nth-child(2) .level-orb { background: radial-gradient(circle at 35% 35%, var(--quantum-light), var(--quantum)); box-shadow: 0 0 14px rgba(124,77,255,0.5); }
.level:nth-child(3) .level-orb { background: radial-gradient(circle at 35% 35%, #EA80FC, #8E24AA); box-shadow: 0 0 14px rgba(234,128,252,0.5); }
.level:nth-child(4) .level-orb { background: radial-gradient(circle at 35% 35%, #80DEEA, #00838F); box-shadow: 0 0 14px rgba(128,222,234,0.5); }
.level-name { font-weight: 700; font-size: 0.9375rem; color: var(--text); }
.level-desc { font-size: 0.8125rem; color: var(--text-dim); margin-left: auto; text-align: right; }

/* 参数条 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-top: 32px;
}
.stat {
  text-align: center;
  padding: 24px 12px;
  border-radius: var(--radius);
  background: rgba(22,18,48,0.7);
  border: 1px solid var(--quantum-dim);
}
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--quantum-light), var(--psi));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { font-size: 0.8125rem; color: var(--text-dim); margin-top: 4px; }

/* 步骤 */
.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}
.steps::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--quantum), var(--psi));
  opacity: 0.35;
  border-radius: 2px;
}
.step {
  display: flex;
  gap: 24px;
  padding: 20px 0;
  position: relative;
}
.step-num {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--void-mid);
  border: 2px solid var(--quantum);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  color: var(--quantum-light);
  font-size: 1.0625rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 16px rgba(124,77,255,0.3);
}
.step-content h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.step-content p { font-size: 0.875rem; color: var(--text-dim); }

/* 图片展示 */
.image-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.image-showcase img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--quantum-dim);
  object-fit: cover;
  aspect-ratio: 16/10;
  transition: transform 0.3s, box-shadow 0.3s;
}
.image-showcase img:hover { transform: scale(1.03); box-shadow: 0 12px 36px rgba(124,77,255,0.3); border-color: var(--quantum-light); }

/* API 代码块 */
.api-block {
  background: var(--void-deep);
  border-radius: var(--radius);
  padding: 32px;
  color: #B388FF;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.875rem;
  line-height: 1.8;
  overflow-x: auto;
  position: relative;
  border: 1px solid var(--quantum-dim);
}
.api-block::before {
  content: 'ψ · POST /v1/chat/completions';
  position: absolute;
  top: -11px; left: 24px;
  background: linear-gradient(90deg, var(--quantum), var(--psi));
  color: #FFFFFF;
  padding: 3px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.api-block .comment { color: #7986CB; }
.api-block .string { color: #80DEEA; }
.api-block .keyword { color: #4FC3F7; }

/* 页脚 */
.footer {
  background: var(--void-deep);
  border-top: 1px solid var(--quantum-dim);
  padding: 64px 24px 32px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--quantum-light);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 0.875rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--psi); }
.footer-bottom {
  max-width: 1200px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--quantum-dim);
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.8;
}

/* 响应式 */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .side-box { flex: 1 1 260px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .mainnav a:not(.btn-api) { display: none; }
  .level-desc { display: none; }
}
@media (max-width: 560px) {
  .hero-cards { flex-direction: column; align-items: stretch; }
  .card { width: 100%; }
  .topbar { padding: 0 16px; }
}

/* 帮助中心特有 */
.help-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.help-nav a {
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--quantum-dim);
  transition: all 0.2s;
}
.help-nav a:hover, .help-nav a.active {
  background: linear-gradient(90deg, var(--quantum), var(--psi));
  color: #FFFFFF;
  border-color: transparent;
}
.faq-item {
  border: 1px solid var(--quantum-dim);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: rgba(22,18,48,0.55);
}
.faq-q {
  padding: 18px 22px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
  color: var(--text);
}
.faq-q:hover { background: rgba(124,77,255,0.08); }
.faq-q::after {
  content: 'ψ';
  font-size: 1.125rem;
  color: var(--quantum-light);
  transition: transform 0.3s;
}
.faq-item.open .faq-q::after { transform: rotate(180deg); color: var(--psi); }
.faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.faq-item.open .faq-a {
  padding: 0 22px 18px;
  max-height: 500px;
}

/* 网页版入口页特有 */
.web-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}
.web-feature:nth-child(even) { direction: rtl; }
.web-feature:nth-child(even) > * { direction: ltr; }
.web-feature img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--quantum-dim);
}
.web-feature h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.web-feature p { color: var(--text-dim); margin-bottom: 16px; }
.web-feature ul { list-style: none; }
.web-feature li {
  padding: 8px 0;
  padding-left: 26px;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text);
}
.web-feature li::before {
  content: '◉';
  position: absolute;
  left: 0;
  color: var(--psi);
  font-size: 0.8125rem;
  top: 10px;
}
@media (max-width: 768px) {
  .web-feature { grid-template-columns: 1fr; }
  .web-feature:nth-child(even) { direction: ltr; }
}