body.page-landing {
  background:
    radial-gradient(circle at top left, rgba(26, 117, 255, 0.12) 0%, rgba(26, 117, 255, 0) 36%),
    radial-gradient(circle at 90% 4%, rgba(27, 201, 177, 0.14) 0%, rgba(27, 201, 177, 0) 32%),
    linear-gradient(180deg, #f6f9ff 0%, #f7fbff 24%, #f7f9fc 100%);
}

.hero {
  position: relative;
  padding: 56px 0 72px;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
  filter: blur(70px);
  opacity: 0.7;
}

.hero::before {
  top: 20px;
  left: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(29, 113, 242, 0.18);
}

.hero::after {
  right: -100px;
  bottom: -70px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(32, 180, 197, 0.18);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(420px, 0.97fr);
  gap: 40px;
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: 22px;
}

.hero-title {
  margin: 0;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.045em;
  color: var(--text-strong);
}

.hero-title .accent {
  color: #145de8;
}

.hero-desc {
  margin: 0;
  max-width: 640px;
  font-size: 18px;
  line-height: 1.9;
  color: var(--text-secondary);
}

.hero-note {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hero-note .card {
  padding: 18px 18px 16px;
}

.hero-note h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--text-strong);
}

.hero-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.hero-visual {
  position: relative;
  display: grid;
  gap: 18px;
}

.hero-panel {
  position: relative;
  padding: 28px;
  border-radius: 34px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(241, 247, 255, 0.92) 100%);
  border: 1px solid rgba(19, 34, 56, 0.08);
  box-shadow: var(--shadow-lg);
}

.ecosystem-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 22px;
}

.ecosystem-head h2 {
  margin: 0 0 8px;
  font-size: 26px;
  line-height: 1.15;
  color: var(--text-strong);
}

.ecosystem-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-pills span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(21, 93, 232, 0.08);
  color: #145de8;
  font-size: 13px;
  font-weight: 700;
}

.web-card {
  padding: 22px;
  border-radius: 26px;
  background: linear-gradient(180deg, #0f1f36 0%, #172b47 100%);
  color: rgba(255, 255, 255, 0.92);
  overflow: hidden;
}

.web-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.window-dots {
  display: flex;
  gap: 8px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
}

.web-card h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.25;
}

.web-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.web-links li {
  padding: 12px 12px 13px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 14px;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.9);
}

.device-lane {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: end;
}

.device-lane .phone-frame:nth-child(1) {
  transform: translateY(24px) rotate(-6deg);
}

.device-lane .phone-frame:nth-child(2) {
  transform: rotate(-1.5deg);
}

.device-lane .phone-frame:nth-child(3) {
  transform: translateY(12px) rotate(5deg);
}

.stat-strip {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px 18px 16px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(19, 34, 56, 0.06);
}

.stat-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 26px;
  line-height: 1;
  color: var(--text-strong);
}

.stat-card span {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-secondary);
}

.value-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-card {
  padding: 26px;
  display: grid;
  gap: 18px;
}

.value-card h3,
.feature-card h3,
.scene-card h3,
.arch-card h3,
.team-card h3,
.info-card h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  color: var(--text-strong);
}

.value-card p,
.feature-card p,
.scene-card p,
.arch-card p,
.team-card p,
.info-card p,
.faq-answer p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.value-icon,
.feature-icon,
.scene-icon,
.arch-icon,
.team-avatar {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #1d71f2 0%, #14bfd3 100%);
  box-shadow: 0 14px 30px rgba(22, 101, 235, 0.24);
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card {
  padding: 24px;
  display: grid;
  gap: 16px;
}

.feature-icon.alt-amber {
  background: linear-gradient(135deg, #ffb446 0%, #ff8a3d 100%);
}

.feature-icon.alt-green {
  background: linear-gradient(135deg, #28b98e 0%, #1f9b77 100%);
}

.feature-icon.alt-indigo {
  background: linear-gradient(135deg, #635bff 0%, #3b64f4 100%);
}

.scene-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 0 16px;
}

.scene-card {
  padding: 28px;
  display: grid;
  gap: 18px;
}

.scene-card ul {
  display: grid;
  gap: 12px;
}

.scene-card li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: start;
}

.scene-card strong {
  display: block;
  margin-bottom: 3px;
  font-size: 15px;
  color: var(--text-strong);
}

.architecture {
  position: relative;
}

.architecture::before {
  content: "";
  position: absolute;
  inset: 90px 0 auto;
  height: 1px;
  background: linear-gradient(90deg, rgba(19, 34, 56, 0) 0%, rgba(19, 34, 56, 0.12) 12%, rgba(19, 34, 56, 0.12) 88%, rgba(19, 34, 56, 0) 100%);
}

.arch-grid {
  position: relative;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.arch-card {
  padding: 28px;
  display: grid;
  gap: 16px;
}

.arch-list {
  display: grid;
  gap: 10px;
}

.arch-list li {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(15, 95, 232, 0.06);
  border: 1px solid rgba(15, 95, 232, 0.08);
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-primary);
}

.media-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.media-mosaic {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.media-mosaic .phone-frame {
  grid-column: span 1;
}

.media-mosaic .phone-frame img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  border-radius: 24px;
  display: block;
}

.media-copy {
  display: grid;
  gap: 18px;
}

.media-copy ul {
  display: grid;
  gap: 12px;
}

.media-copy li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: start;
}

.team-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
}

.team-card {
  padding: 24px;
  display: grid;
  gap: 16px;
}

.team-avatar {
  border-radius: 20px;
  font-size: 22px;
}

.team-role {
  font-size: 13px;
  font-weight: 700;
  color: #145de8;
}

.team-name {
  margin: 0;
  font-size: 19px;
  color: var(--text-strong);
}

.info-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-card {
  padding: 28px;
  display: grid;
  gap: 16px;
}

.info-card ul {
  display: grid;
  gap: 10px;
}

.info-card li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(19, 34, 56, 0.08);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-strong);
}

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

.faq-item summary::after {
  content: "+";
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(20, 93, 232, 0.08);
  color: #145de8;
  font-size: 22px;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 24px 22px;
}

.cta-band {
  padding: 34px;
  border-radius: 32px;
  background: linear-gradient(135deg, #0f56d9 0%, #17a6c8 100%);
  color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 26px 60px rgba(18, 89, 209, 0.24);
}

.cta-band h3 {
  margin: 0 0 10px;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.12;
}

.cta-band p {
  margin: 0 0 20px;
  max-width: 760px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
}

.cta-band .btn-secondary {
  background: rgba(255, 255, 255, 0.96);
  color: #1143b1;
  border-color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 1199px) {
  .hero-grid,
  .media-stage {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 980px;
  }

  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stat-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 959px) {
  .hero {
    padding-top: 36px;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero-desc {
    font-size: 17px;
  }

  .hero-note,
  .value-grid,
  .feature-grid,
  .scene-grid,
  .arch-grid,
  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .device-lane {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .media-mosaic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-mosaic .phone-frame:nth-child(1),
  .media-mosaic .phone-frame:nth-child(2),
  .media-mosaic .phone-frame:nth-child(3),
  .media-mosaic .phone-frame:nth-child(4) {
    grid-column: span 1;
  }

  .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .architecture::before {
    display: none;
  }
}

@media (max-width: 639px) {
  .hero-title {
    font-size: clamp(36px, 13vw, 54px);
  }

  .hero-desc {
    font-size: 16px;
    line-height: 1.8;
  }

  .hero-note,
  .stat-strip,
  .value-grid,
  .feature-grid,
  .scene-grid,
  .arch-grid,
  .info-grid,
  .team-grid,
  .device-lane,
  .media-mosaic,
  .web-links {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .cta-band,
  .value-card,
  .feature-card,
  .scene-card,
  .arch-card,
  .team-card,
  .info-card {
    padding: 22px;
  }

  .ecosystem-head {
    flex-direction: column;
  }

  .phone-frame::before {
    width: 96px;
  }

  .device-lane .phone-frame,
  .device-lane .phone-frame:nth-child(1),
  .device-lane .phone-frame:nth-child(2),
  .device-lane .phone-frame:nth-child(3) {
    transform: none;
  }

  .faq-item summary {
    padding: 18px 18px;
    font-size: 16px;
  }

  .faq-answer {
    padding: 0 18px 18px;
  }
}

/* ═══════════════════════════════════════
   滚动触发动画
   元素初始状态为 .reveal（隐藏），
   进入视口后由 JS 添加 .in-view 触发入场。
   支持四个方向变体：默认向上、向左、向右、缩放。
═══════════════════════════════════════ */

/* 初始隐藏态 */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.from-left  { transform: translateX(-44px); }
.reveal.from-right { transform: translateX(44px); }
.reveal.from-scale { transform: scale(0.94) translateY(20px); }

/* 入场态 */
.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* 级联延迟（子元素依次入场） */
.reveal-group > *      { opacity: 0; transform: translateY(28px);
                         transition: opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
                                     transform 0.55s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal-group.in-view > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0ms; }
.reveal-group.in-view > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 90ms; }
.reveal-group.in-view > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 180ms; }
.reveal-group.in-view > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 270ms; }
.reveal-group.in-view > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 360ms; }

/* 减弱动画偏好 */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-group > * {
    transition: opacity 0.3s ease;
    transform: none;
  }
}