/* 大模型AI外呼：利益导向板式，色调沿用品牌蓝紫 */

.page-ai {
  --ink: #17233d;
  --muted: #657180;
  --line: #e6ebf4;
  --brand: #4348ff;
  --soft: #f4f6fb;
  background: #fff;
  color: var(--ink);
}

.ai-wrap {
  width: 1200px;
  max-width: calc(100% - 48px);
  margin: 0 auto;
}

.ai-cta,
.ai-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
}

.ai-cta {
  color: #fff;
  background: linear-gradient(111deg, #3f43ff 0%, #b65bff 100%);
}

.ai-cta:hover { filter: brightness(1.06); }

.ai-ghost {
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.ai-ghost:hover { background: rgba(255, 255, 255, 0.08); }

/* ===== 首屏 ===== */
.ai-hero {
  margin-top: 80px;
  padding: 72px 0 56px;
  color: #fff;
  background:
    radial-gradient(720px 380px at 90% 0%, rgba(182, 91, 255, 0.38), transparent 58%),
    radial-gradient(520px 280px at 0% 100%, rgba(67, 72, 255, 0.32), transparent 50%),
    linear-gradient(165deg, #0f1530 0%, #1b2158 52%, #2c1654 100%);
}

.ai-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.ai-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: #d8dcff;
  font-size: 13px;
}

.ai-kicker i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7ee8ff;
}

.ai-hero h1 {
  margin-top: 20px;
  font-size: 64px;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.ai-hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7ee8ff 0%, #9b86ff 48%, #e38bff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ai-hero-desc {
  margin-top: 18px;
  max-width: 540px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
  line-height: 1.75;
}

.ai-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.ai-hero-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.ai-hero-marks span {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.hero-stage {
  padding: 8px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stage-top {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px 18px;
}

.hero-stage-top em {
  font-style: normal;
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(100deg, #7ee8ff 0%, #c08bff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-stage-top strong {
  display: block;
  font-size: 20px;
}

.hero-stage-top p {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.hero-call {
  margin: 0 8px 8px;
  padding: 16px 18px 14px;
  border-radius: 16px;
  background: rgba(8, 12, 28, 0.55);
}

.hero-call-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}

.hero-call-bar b { color: #8ef0c8; font-weight: 600; }

.hero-say {
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.6;
}

.hero-say.is-user {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
}

.hero-say.is-ai {
  background: rgba(67, 72, 255, 0.28);
  color: #e8e9ff;
}

.hero-call-foot {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #9b86ff;
  font-size: 13px;
  font-weight: 600;
}

/* ===== 目录 ===== */
.ai-jump {
  position: sticky;
  top: 80px;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.ai-jump-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 0;
}

.ai-jump a {
  flex-shrink: 0;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
}

.ai-jump a.is-on,
.ai-jump a:hover {
  background: #eef2ff;
  color: var(--brand);
}

/* ===== 通用 ===== */
.ai-sec {
  padding: 88px 0;
  scroll-margin-top: 120px;
}

.ai-sec.is-soft { background: var(--soft); }
.ai-sec.is-white { background: #fff; }
.ai-sec.is-ink { background: #12182d; color: #fff; }

.ai-label {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.ai-sec.is-ink .ai-label { color: #9bb0ff; }

.ai-head {
  max-width: 760px;
  margin-bottom: 40px;
}

.ai-head.is-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.ai-head h2 {
  margin-top: 10px;
  font-size: 36px;
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

.ai-head p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.ai-sec.is-ink .ai-head p { color: rgba(255, 255, 255, 0.66); }

/* ===== 人工 vs AI 对比 ===== */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}

.compare-col {
  padding: 32px 30px;
  border-radius: 22px;
}

.compare-col.is-old {
  background: #fff;
  border: 1px solid var(--line);
}

.compare-col.is-new {
  color: #fff;
  background: linear-gradient(150deg, #2a2f8f 0%, #4348ff 46%, #9a55ff 100%);
  box-shadow: 0 24px 48px rgba(67, 72, 255, 0.24);
}

.compare-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.compare-col.is-old .compare-tag {
  color: var(--muted);
  background: var(--soft);
}

.compare-col.is-new .compare-tag {
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
}

.compare-col ul { list-style: none; margin: 0; padding: 0; }

.compare-col li {
  padding: 16px 0;
  font-size: 16px;
  line-height: 1.55;
  border-top: 1px solid var(--line);
}

.compare-col li:first-child { border-top: none; }

.compare-col.is-new li { border-top-color: rgba(255, 255, 255, 0.16); }

.compare-col li b {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.compare-col.is-old li { color: var(--ink); }
.compare-col.is-old li b { color: var(--muted); }
.compare-col.is-new li b { color: rgba(255, 255, 255, 0.72); }

/* ===== 能做什么 ===== */
.capa-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.capa-grid article {
  padding: 30px 28px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.capa-grid b {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.capa-grid p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.capa-grid h3 {
  margin: 12px 0 8px;
  font-size: 22px;
}

/* ===== 超拟人发声 ===== */
.voice-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
}

.voice-grid article:last-child {
  grid-column: 2 / 4;
}

.voice-grid article {
  padding: 28px 26px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
}

.voice-grid .voice-lead {
  grid-row: 1 / span 2;
  color: #fff;
  background:
    radial-gradient(420px 200px at 90% 0%, rgba(182, 91, 255, 0.32), transparent 58%),
    linear-gradient(160deg, #1a2158 0%, #2c1a62 100%);
  border-color: transparent;
}

.voice-grid span,
.voice-grid b {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.voice-lead span { color: #b8c4ff; }

.voice-grid h3 {
  margin: 12px 0 10px;
  font-size: 22px;
}

.voice-grid p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.voice-lead p { color: rgba(255, 255, 255, 0.74); }

.voice-lead ul {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.voice-lead li {
  position: relative;
  padding: 8px 0 8px 16px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
}

.voice-lead li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7ee8ff;
}

.voice-wave {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 56px;
  margin-top: 28px;
}

.voice-wave i {
  flex: 1;
  border-radius: 99px;
  background: linear-gradient(180deg, #7ee8ff, #9b86ff);
  opacity: 0.85;
}

.voice-wave i:nth-child(1) { height: 28%; }
.voice-wave i:nth-child(2) { height: 52%; }
.voice-wave i:nth-child(3) { height: 78%; }
.voice-wave i:nth-child(4) { height: 44%; }
.voice-wave i:nth-child(5) { height: 90%; }
.voice-wave i:nth-child(6) { height: 62%; }
.voice-wave i:nth-child(7) { height: 38%; }
.voice-wave i:nth-child(8) { height: 84%; }
.voice-wave i:nth-child(9) { height: 56%; }
.voice-wave i:nth-child(10) { height: 72%; }
.voice-wave i:nth-child(11) { height: 40%; }
.voice-wave i:nth-child(12) { height: 64%; }

/* ===== 底层实力 ===== */
.engine-specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 16px;
}

.engine-specs article {
  padding: 26px 22px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.engine-specs strong {
  display: block;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(100deg, #7ee8ff, #c08bff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.engine-specs b {
  display: block;
  margin: 10px 0 6px;
  font-size: 15px;
}

.engine-specs p {
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
  line-height: 1.6;
}

.engine-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.engine-grid article {
  padding: 24px 22px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.engine-grid h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.engine-grid p {
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  line-height: 1.7;
}

/* ===== 技术与服务 ===== */
.trust-nums {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.trust-nums article {
  padding: 28px 22px;
  border-radius: 20px;
  background: linear-gradient(180deg, #f7f5ff 0%, #eef3ff 100%);
  border: 1px solid transparent;
}

.trust-nums strong {
  display: block;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  background: linear-gradient(111deg, #3f43ff, #b65bff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.trust-nums b {
  display: block;
  margin: 12px 0 6px;
  font-size: 15px;
}

.trust-nums p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.trust-grid article {
  padding: 26px 24px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
}

.trust-grid b {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.trust-grid h3 {
  margin: 10px 0 8px;
  font-size: 18px;
}

.trust-grid p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ===== 五分钟 ===== */
.setup {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.setup article {
  padding: 24px 22px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
}

.setup b {
  color: var(--brand);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.setup h3 { margin-top: 10px; font-size: 16px; }
.setup p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

/* ===== 行业结果 ===== */
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.scene-card {
  padding: 28px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #fff;
}

.scene-card:first-child {
  background: linear-gradient(145deg, rgba(67, 72, 255, 0.35), rgba(182, 91, 255, 0.22));
  border-color: transparent;
}

.scene-card span {
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.scene-card h3 {
  margin: 10px 0;
  font-size: 22px;
}

.scene-card p {
  color: rgba(255, 255, 255, 0.66);
  font-size: 14px;
  line-height: 1.7;
}

.scene-card span { color: #b8c4ff; }

/* ===== 闭环 ===== */
.loop {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.loop article {
  padding: 22px 18px;
  border-radius: 16px;
  background: var(--soft);
}

.loop b { color: var(--brand); font-size: 13px; }
.loop h3 { margin: 8px 0; font-size: 17px; }
.loop p { color: var(--muted); font-size: 13px; line-height: 1.65; }

/* ===== FAQ ===== */
.ai-faq details {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.ai-faq summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  list-style: none;
}

.ai-faq summary::-webkit-details-marker { display: none; }

.ai-faq details p {
  margin-top: 10px;
  max-width: 800px;
  color: var(--muted);
  line-height: 1.75;
}

.ai-end {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 56px;
  padding: 36px 40px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(111deg, #3f43ff 0%, #7b5bff 52%, #b65bff 100%);
}

.ai-end h2 {
  font-size: 28px;
  font-weight: 600;
}
.ai-end p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px;
}
.ai-end .ai-cta {
  background: #fff;
  color: #4348ff;
  box-shadow: none;
}

@media (max-width: 980px) {
  .ai-hero { padding: 40px 0 36px; }
  .ai-hero h1 { font-size: 40px; }
  .ai-hero-grid,
  .compare,
  .capa-grid,
  .voice-grid,
  .engine-specs,
  .engine-grid,
  .trust-nums,
  .trust-grid,
  .setup,
  .scene-grid,
  .loop,
  .ai-end {
    grid-template-columns: 1fr;
    display: grid;
  }
  .voice-grid .voice-lead { grid-row: auto; }
  .voice-grid article:last-child { grid-column: auto; }
  .ai-end {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  .ai-head h2 { font-size: 28px; }
  .ai-sec { padding: 64px 0; }
  .hero-stage-top em { font-size: 44px; }
}