/* ========== 圆壹智慧 · aidd.one ========== */
/* 品牌色 (以官方 logo 为准):
   - 青 (cyan):  #3DD6D0 -> #155E7A
   - 紫 (purple):#A94FD8 -> #4A1D6E
   - 橙 (orange):#F26B3A -> #FFA95C
   - 蓝 (blue):  #3B82F6  (.one 色)
   - 背景: 纯黑 #000
*/
:root {
  --bg: #000000;
  --bg-2: #0a0a0a;
  --bg-3: #0f0f14;
  --ink: #f5f7fa;
  --ink-dim: #a5adbb;
  --ink-mute: #6b7280;
  --accent: #3DD6D0;       /* 主 accent - 青 */
  --accent-2: #A94FD8;     /* 紫 */
  --accent-3: #F26B3A;     /* 橙 */
  --accent-blue: #3B82F6;  /* .one 蓝 */
  --line: rgba(61, 214, 208, 0.2);
  --line-2: rgba(255, 255, 255, 0.06);
  --card: rgba(15, 15, 22, 0.7);
  --card-hi: rgba(61, 214, 208, 0.08);
  --danger: #ff6b8a;
  --radius: 14px;
  --radius-sm: 8px;
  --font-cn: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-en: "Inter", "SF Pro Display", -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 900px 600px at 15% 0%, rgba(61, 214, 208, 0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 85% 25%, rgba(169, 79, 216, 0.09), transparent 60%),
    radial-gradient(ellipse 800px 500px at 50% 100%, rgba(242, 107, 58, 0.05), transparent 60%);
  background-attachment: fixed;
}

/* 分子网格背景 */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(61, 214, 208, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 214, 208, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  pointer-events: none;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-2); }

.mono { font-family: var(--font-mono); }
.en { font-family: var(--font-en); letter-spacing: 0.02em; }

/* ========== 布局 ========== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 90px 0;
  position: relative;
}

/* ========== 顶栏 ========== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(0, 0, 0, 0.75);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}
.logo-img {
  height: 42px;
  width: auto;
  display: block;
}
.logo-text-cn {
  font-weight: 700;
  font-size: 17px;
  line-height: 1.15;
  letter-spacing: 0.05em;
}
.logo-text-en {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.06em;
  margin-top: 3px;
}
.logo-text-en .dot-one { color: var(--accent-blue); }

.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a {
  color: var(--ink-dim);
  font-size: 14px;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-cta {
  padding: 8px 18px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent) !important;
  font-size: 13px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent); color: #000 !important; }

.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 24px; cursor: pointer; }

/* ========== Hero ========== */
.hero {
  padding: 180px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--card-hi);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 24px;
}
.hero-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(36px, 6vw, 66px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-title .grad {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 1.5vw, 20px);
  color: var(--ink-dim);
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: all .25s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #ffffff;
  box-shadow: 0 8px 28px rgba(61, 214, 208, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(169, 79, 216, 0.4);
  color: #ffffff;
}
.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ========== 数据条 ========== */
.stat-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 40px 0;
  background: rgba(10, 10, 15, 0.5);
}
.stat-strip-inner {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-num {
  font-family: var(--font-en);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 800;
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.stat-label {
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

/* ========== 章节标题 ========== */
.sect-head {
  text-align: center;
  margin-bottom: 60px;
}
.sect-eyebrow {
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-family: var(--font-en);
}
.sect-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}
.sect-sub {
  font-size: 16px;
  color: var(--ink-dim);
  max-width: 680px;
  margin: 0 auto;
}

/* ========== 平台卡片 ========== */
.platforms {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.platform-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: all .3s;
  display: flex;
  flex-direction: column;
  min-height: 320px;
}
.platform-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.platform-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(61, 214, 208, 0.15), 0 0 40px rgba(169, 79, 216, 0.08);
}
.platform-card:hover::before { opacity: 1; }

.p-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(61, 214, 208, 0.18), rgba(169, 79, 216, 0.18));
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.p-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}
.p-name-en {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.p-desc {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}
.p-metrics {
  display: flex;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line-2);
  margin-bottom: 16px;
}
.p-metric-num {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}
.p-metric-lbl {
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 2px;
}
.p-link {
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s;
}
.p-link:hover { gap: 12px; }

/* 平台卡片 accent 变体 - 每张卡片一个 logo 色 */
.platform-card.accent-cyan   { --card-accent: #3DD6D0; }
.platform-card.accent-purple { --card-accent: #A94FD8; }
.platform-card.accent-orange { --card-accent: #F26B3A; }
.platform-card.accent-blue   { --card-accent: #4DA8FF; }

.platform-card.accent-cyan .p-icon   { background: linear-gradient(135deg, rgba(61,214,208,0.25), rgba(21,94,122,0.15)); }
.platform-card.accent-purple .p-icon { background: linear-gradient(135deg, rgba(169,79,216,0.25), rgba(74,29,110,0.15)); }
.platform-card.accent-orange .p-icon { background: linear-gradient(135deg, rgba(242,107,58,0.25), rgba(255,169,92,0.10)); }
.platform-card.accent-blue .p-icon   { background: linear-gradient(135deg, rgba(77,168,255,0.25), rgba(59,130,246,0.15)); }

.platform-card.accent-cyan .p-metric-num   { color: #3DD6D0; }
.platform-card.accent-purple .p-metric-num { color: #C77CE6; }
.platform-card.accent-orange .p-metric-num { color: #FF8C55; }
.platform-card.accent-blue .p-metric-num   { color: #4DA8FF; }

.platform-card.accent-cyan .p-link   { color: #3DD6D0; }
.platform-card.accent-purple .p-link { color: #C77CE6; }
.platform-card.accent-orange .p-link { color: #FF8C55; }
.platform-card.accent-blue .p-link   { color: #4DA8FF; }

/* ========== 特色 / 数据依据 ========== */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature {
  padding: 32px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: left;
}
.feature-num {
  font-family: var(--font-en);
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}
.feature:nth-child(2) .feature-num { color: var(--accent-2); }
.feature:nth-child(3) .feature-num { color: var(--accent-3); }
.feature:nth-child(5) .feature-num { color: var(--accent-2); }
.feature:nth-child(6) .feature-num { color: var(--accent-3); }
.feature-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-desc {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
}

/* ========== 平台子页 ========== */
.page-hero {
  padding: 160px 0 60px;
  border-bottom: 1px solid var(--line);
}
.page-hero-inner {
  max-width: 900px;
  margin: 0 auto;
}
.page-crumb {
  color: var(--ink-mute);
  font-size: 13px;
  margin-bottom: 20px;
}
.page-crumb a { color: var(--ink-dim); }
.page-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
}
.page-title .grad {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-title .grad-cyan   { background: linear-gradient(120deg, #3DD6D0, #4DA8FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-title .grad-purple { background: linear-gradient(120deg, #A94FD8, #F26B3A); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-title .grad-orange { background: linear-gradient(120deg, #F26B3A, #FFA95C); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-title .grad-blue   { background: linear-gradient(120deg, #4DA8FF, #A94FD8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-lead {
  font-size: 20px;
  color: var(--ink-dim);
  line-height: 1.7;
  max-width: 780px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 60px 0;
}
.metric-card {
  padding: 28px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}
.metric-card-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.metric-card-lbl {
  font-size: 13px;
  color: var(--ink-dim);
  margin-top: 6px;
}

.detail-block {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 80px;
}
.detail-block:last-child { margin-bottom: 0; }
.detail-block h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}
.detail-block p {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.detail-list {
  list-style: none;
  padding: 0;
}
.detail-list li {
  padding: 12px 0 12px 28px;
  color: var(--ink);
  font-size: 15px;
  position: relative;
  border-bottom: 1px solid var(--line-2);
}
.detail-list li::before {
  content: "";
  position: absolute;
  left: 8px; top: 20px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.detail-list li:last-child { border-bottom: 0; }
.detail-list li strong { color: var(--accent); font-weight: 600; }

.applications {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
}
.app-tile {
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.app-tile-h {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 15px;
}
.app-tile-p {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.6;
}

/* ========== CTA / 联系 ========== */
.cta {
  background: linear-gradient(135deg, rgba(61, 214, 208, 0.06), rgba(169, 79, 216, 0.06), rgba(242, 107, 58, 0.04));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.cta h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}
.cta p {
  color: var(--ink-dim);
  font-size: 17px;
  margin-bottom: 32px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.cta-info {
  display: inline-flex;
  gap: 32px;
  margin-top: 24px;
  color: var(--ink-dim);
  font-size: 14px;
  flex-wrap: wrap;
  justify-content: center;
}
.cta-info span { display: inline-flex; align-items: center; gap: 6px; }

/* ========== 页脚 ========== */
footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.6);
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.foot-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.foot-col a {
  display: block;
  color: var(--ink-dim);
  font-size: 14px;
  padding: 6px 0;
}
.foot-col a:hover { color: var(--accent); }
.foot-brand-desc {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}
.foot-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--line-2);
  display: flex;
  justify-content: space-between;
  color: var(--ink-mute);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #000;
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--line);
  }
  .stat-strip-inner { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
  .stat-strip-inner > div:nth-child(5) { grid-column: 1 / -1; }
  .platforms { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-block { grid-template-columns: 1fr; gap: 24px; }
  .applications { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  section { padding: 60px 0; }
  .hero { padding: 130px 0 60px; }
  .logo-img { height: 36px; }
  .logo-text-cn { font-size: 15px; }
}

/* fade-in */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s, transform .8s; }
.reveal.in { opacity: 1; transform: none; }