:root {
  --bg: #f7f9fd;
  --ink: #0d1b2e;
  --muted: #5d6b7f;
  --line: #d9e4f1;
  --surface: #ffffff;
  --surface-blue: #edf6ff;
  --primary: #176ee6;
  --primary-dark: #0d55bd;
  --cyan: #62d4ff;
  --green: #1da97a;
  --soft-shadow: 0 18px 50px rgba(20, 60, 110, 0.14);
  --hard-shadow: 0 34px 90px rgba(10, 38, 88, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 0 48px;
  border-bottom: 1px solid rgba(217, 228, 241, 0.7);
  background: rgba(247, 249, 253, 0.9);
  backdrop-filter: blur(16px);
}

.brand,
.site-nav,
.header-actions,
.hero-actions,
.proof-row,
.trusted div,
.footer-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-logo {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  overflow: hidden;
  border: 1px solid rgba(217, 228, 241, 0.9);
  border-radius: 10px;
  background: #fff;
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-nav {
  gap: 30px;
  color: #425064;
  font-size: 15px;
}

.site-nav a:hover,
.link-action:hover,
.footer-links a:hover {
  color: var(--primary);
}

.header-actions {
  gap: 14px;
}

.link-action {
  color: #425064;
  font-weight: 700;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  font-weight: 800;
}

.button.small {
  min-height: 40px;
  padding: 0 16px;
}

.button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.button.primary:hover {
  background: var(--primary-dark);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.9);
}

.button.disabled,
.button[aria-disabled="true"] {
  pointer-events: none;
  border-color: #cbd5e1;
  background: #e5eaf1;
  color: #64748b;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 48px 92px;
  background:
    radial-gradient(circle at 22% 8%, rgba(104, 213, 255, 0.42), transparent 28%),
    linear-gradient(180deg, #f9fbff 0%, #eef7ff 58%, #f7f9fd 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-bg .grid {
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(23, 110, 230, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 110, 230, 0.08) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 76%);
}

.arc {
  position: absolute;
  display: block;
  border: 1px solid rgba(23, 110, 230, 0.18);
  border-radius: 50%;
}

.arc-one {
  width: 620px;
  height: 620px;
  right: -120px;
  top: 60px;
}

.arc-two {
  width: 360px;
  height: 360px;
  left: -80px;
  top: 180px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.announcement {
  display: inline-flex;
  margin-bottom: 22px;
  padding: 9px 14px;
  border: 1px solid rgba(23, 110, 230, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 980px;
  margin: 0 auto 22px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 56px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.hero-inner > p,
.band-copy > p,
.section-heading > p,
.split-copy > p,
.cta-section > p,
.site-footer p {
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  justify-content: center;
  gap: 12px;
  margin: 32px 0 24px;
}

.proof-row {
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.proof-row a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(217, 228, 241, 0.78);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  line-height: 1;
}

.proof-row strong {
  color: var(--ink);
  line-height: 1;
}

.proof-row span {
  line-height: 1;
}

.dashboard-stage {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 58px auto 0;
}

.stage-shadow {
  position: absolute;
  right: 9%;
  bottom: -18px;
  left: 9%;
  height: 80px;
  border-radius: 50%;
  background: rgba(23, 110, 230, 0.24);
  filter: blur(38px);
}

.hero-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(190, 211, 235, 0.95);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--hard-shadow);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d2dbe7;
}

.window-bar span:first-child {
  background: #f15f5a;
}

.window-bar span:nth-child(2) {
  background: #f2bf4f;
}

.window-bar span:nth-child(3) {
  background: #4aba68;
}

.hero-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.floating-card {
  position: absolute;
  z-index: 2;
  display: grid;
  gap: 6px;
  max-width: 260px;
  padding: 16px 18px;
  border: 1px solid rgba(217, 228, 241, 0.92);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--soft-shadow);
}

.floating-card span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.floating-card strong {
  font-size: 15px;
  line-height: 1.45;
}

.ai-card {
  left: -34px;
  top: 84px;
}

.stats-card {
  right: -24px;
  bottom: 76px;
}

.trusted {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 48px 70px;
  text-align: center;
}

.trusted p {
  margin-bottom: 18px;
  color: var(--muted);
  font-weight: 800;
}

.trusted div {
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.trusted span {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: #405169;
  font-weight: 800;
}

.feature-band,
.section,
.download-section,
.split-feature,
.workflow-band,
.cta-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 82px 48px;
}

.download-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 90% 15%, rgba(98, 212, 255, 0.2), transparent 26%),
    #fff;
  box-shadow: 0 12px 34px rgba(27, 54, 90, 0.08);
}

.download-section div {
  max-width: 720px;
}

.download-section p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
}

.ai-band {
  position: relative;
  max-width: none;
  min-height: 740px;
  overflow: hidden;
  padding: 122px max(48px, calc((100vw - 1180px) / 2 + 48px)) 0;
  background:
    linear-gradient(rgba(16, 27, 46, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 27, 46, 0.08) 1px, transparent 1px),
    #fff;
  background-position: 0 378px, 0 378px, 0 0;
  background-size: 148px 102px, 148px 102px, auto;
  color: var(--ink);
}

.wave-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 54px;
  background:
    radial-gradient(28px 24px at 28px 0, transparent 25px, #fff6df 26px),
    linear-gradient(90deg, #fff1c9 0%, #fff6e6 45%, #fbf7fb 100%);
  background-repeat: repeat-x, no-repeat;
  background-size: 56px 54px, auto;
}

.ai-band-inner {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
}

.ai-band .band-copy {
  max-width: 930px;
}

.ai-band .band-copy > p {
  max-width: 980px;
  color: #17253a;
  font-size: 19px;
}

.section-kicker {
  margin-bottom: 10px;
  color: var(--primary);
  font-size: 15px;
  font-weight: 900;
}

.section-link {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 42px;
  color: #5d4acf;
  font-weight: 900;
}

.section-link i {
  width: 1px;
  height: 20px;
  background: #c7bcff;
}

.section-link a {
  color: #5d4acf;
}

.mini-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 2px solid #6652d9;
  border-radius: 7px;
  font-size: 10px;
  line-height: 1;
}

.ai-canvas {
  position: relative;
  min-height: 444px;
  margin-top: 76px;
}

.track,
.track-vertical {
  position: absolute;
  pointer-events: none;
}

.track {
  left: 160px;
  right: 185px;
  bottom: 150px;
  height: 26px;
  border-radius: 0 0 42px 42px;
}

.track-purple {
  border-bottom: 17px solid #d7ccff;
}

.track-gold {
  bottom: 128px;
  border-bottom: 17px solid #ffe0a4;
}

.track-vertical {
  right: 44px;
  bottom: 150px;
  width: 58px;
  height: 420px;
  border-radius: 0 0 54px 54px;
}

.track-vertical.track-purple {
  border-right: 18px solid #d7ccff;
  border-bottom: 18px solid #d7ccff;
}

.track-vertical.track-gold {
  right: 20px;
  bottom: 128px;
  border-right: 18px solid #ffe0a4;
  border-bottom: 18px solid #ffe0a4;
}

.bolt-badge {
  position: absolute;
  z-index: 3;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 10px 24px rgba(74, 58, 163, 0.18);
}

.bolt-badge.main {
  right: 18px;
  top: -360px;
  width: 76px;
  height: 76px;
  border: 7px solid #e3d9ff;
  color: #6652d9;
  font-size: 30px;
}

.bubble {
  position: absolute;
  z-index: 4;
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(24, 31, 48, 0.12);
  font-size: 14px;
}

.bubble-one {
  left: 6px;
  top: -10px;
  background: #f4f4f7;
  color: #152033;
}

.bubble-two {
  left: 116px;
  top: 58px;
  background: #c8c2ff;
  color: #111827;
}

.ai-feature-card,
.copilot-card {
  position: absolute;
  z-index: 2;
  border: 1px solid #e1dcff;
  border-radius: 18px;
  background:
    radial-gradient(#e6e0ff 1px, transparent 1.4px),
    rgba(255, 255, 255, 0.98);
  background-size: 12px 12px, auto;
  box-shadow: 0 16px 38px rgba(78, 64, 150, 0.12);
  color: #071326;
}

.ai-feature-card {
  width: 310px;
  min-height: 304px;
  padding: 36px 32px;
}

.card-one {
  left: 0;
  bottom: 36px;
}

.card-two {
  left: 350px;
  bottom: 36px;
}

.card-glyph {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 34px;
  border: 3px solid #6c6d73;
  border-radius: 12px;
  color: #6c6d73;
  font-size: 12px;
  font-weight: 900;
}

.card-glyph.headset {
  border-color: #a66cff;
  color: #a66cff;
}

.ai-feature-card p {
  color: #17253a;
  font-size: 17px;
}

.copilot-card {
  right: 120px;
  bottom: 36px;
  width: 310px;
  min-height: 304px;
  padding: 26px 26px 24px;
  background: #fff;
}

.msg-line {
  display: grid;
  gap: 7px;
  margin-bottom: 20px;
}

.msg-line strong {
  font-size: 15px;
}

.msg-line span {
  color: #17253a;
  font-size: 15px;
}

.msg-line.muted strong,
.msg-line.muted span {
  color: #59677a;
}

.suggest-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 18px;
}

.suggest-actions button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f8fafc;
  font-weight: 800;
}

.suggest-actions button:last-child {
  border-color: #d9ccff;
  box-shadow: 0 0 0 3px rgba(174, 153, 255, 0.18);
}

.ask-box {
  padding: 13px 14px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  color: #69778b;
  font-size: 14px;
}

.section-heading.center {
  max-width: 820px;
  margin: 0 auto 42px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  min-height: 246px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(27, 54, 90, 0.06);
}

.feature-grid p {
  color: var(--muted);
}

.icon-box {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 26px;
  border-radius: 12px;
  background: #e8f2ff;
  color: var(--primary);
  font-weight: 900;
}

.split-feature {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 54px;
  align-items: center;
}

.mock-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--soft-shadow);
}

.knowledge-panel {
  padding: 24px;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.panel-top span {
  color: var(--green);
  font-weight: 900;
}

.knowledge-search {
  margin: 20px 0;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: #7a889a;
}

.knowledge-list {
  display: grid;
  gap: 12px;
}

.knowledge-list div {
  display: grid;
  gap: 5px;
  padding: 18px;
  border-radius: 14px;
  background: #f4f8fd;
}

.knowledge-list span,
.check-list,
.workflow span {
  color: var(--muted);
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding-left: 20px;
}

.workflow-band {
  max-width: none;
  background: var(--surface-blue);
}

.workflow-band > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.workflow li {
  position: relative;
  min-height: 190px;
  padding: 62px 22px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  counter-increment: step;
}

.workflow li::before {
  content: counter(step);
  position: absolute;
  top: 22px;
  left: 22px;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

.workflow strong,
.workflow span {
  display: block;
}

.cta-section {
  margin-bottom: 42px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at 85% 15%, rgba(98, 212, 255, 0.26), transparent 30%),
    linear-gradient(135deg, #ffffff 0%, #edf6ff 100%);
  text-align: center;
}

.cta-section .hero-actions {
  margin-bottom: 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding: 42px 48px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.site-footer p {
  margin: 14px 0 0;
}

.footer-links {
  align-items: flex-start;
  gap: 18px;
  color: var(--muted);
  font-weight: 800;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  place-items: center;
  padding: 24px;
}

.modal:target {
  display: grid;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 19, 38, 0.58);
  backdrop-filter: blur(8px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(7, 19, 38, 0.28);
  text-align: center;
}

.modal-panel h2 {
  margin-bottom: 10px;
  font-size: 30px;
}

.modal-panel p {
  margin-bottom: 20px;
  color: var(--muted);
}

.modal-panel img {
  display: block;
  width: min(280px, 100%);
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 26px;
  line-height: 1;
}

.modal-close:hover {
  background: #f2f5f9;
  color: var(--ink);
}

@media (max-width: 1100px) {
  .feature-grid,
  .workflow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-band,
  .split-feature {
    grid-template-columns: 1fr;
  }

  .floating-card {
    display: none;
  }

  .ai-band {
    min-height: auto;
    padding-bottom: 72px;
  }

  .ai-canvas {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    min-height: auto;
  }

  .track,
  .track-vertical,
  .bolt-badge,
  .bubble {
    display: none;
  }

  .ai-feature-card,
  .copilot-card {
    position: static;
    width: auto;
    min-height: 280px;
  }

  .copilot-card {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 0 20px;
  }

  .site-nav,
  .link-action {
    display: none;
  }

  .hero,
  .trusted,
  .section,
  .download-section,
  .feature-band,
  .split-feature,
  .workflow-band,
  .cta-section {
    padding-left: 22px;
    padding-right: 22px;
  }

  .hero {
    padding-top: 54px;
    padding-bottom: 62px;
  }

  .announcement {
    border-radius: 12px;
  }

  .arc {
    display: none;
  }

  .hero-actions,
  .download-section,
  .button {
    width: 100%;
  }

  .download-section {
    align-items: stretch;
    flex-direction: column;
    border-radius: 18px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .proof-row a {
    width: 100%;
    justify-content: center;
  }

  .dashboard-stage {
    margin-top: 38px;
  }

  .hero-visual {
    border-radius: 14px;
  }

  .trusted div,
  .footer-links,
  .site-footer {
    flex-direction: column;
  }

  .feature-grid,
  .workflow {
    grid-template-columns: 1fr;
  }

  .ai-band {
    padding-top: 88px;
    background-position: 0 320px, 0 320px, 0 0;
    background-size: 92px 78px, 92px 78px, auto;
  }

  .section-link {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
  }

  .ai-canvas {
    grid-template-columns: 1fr;
    margin-top: 36px;
  }

  .ai-feature-card,
  .copilot-card {
    min-height: auto;
    padding: 24px;
    border-radius: 16px;
  }

  .cta-section {
    border-radius: 18px;
  }
}