:root {
  color-scheme: light;
  --ink: #102024;
  --text: #324347;
  --muted: #66777b;
  --line: #dde7e5;
  --paper: #ffffff;
  --soft: #f4f8f7;
  --charcoal: #071113;
  --cyan: #16b8d5;
  --green: #45c17a;
  --gold: #d9a947;
  --coral: #e06b5c;
  --shadow: 0 20px 60px rgba(7, 17, 19, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: 100%;
  min-height: 72px;
  padding: 14px clamp(18px, 5vw, 64px);
  color: #fff;
  background: rgba(7, 17, 19, 0.62);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.brand,
.header-brand-group,
.nav-links,
.hero-actions,
.contact-actions {
  display: flex;
  align-items: center;
}

.header-brand-group {
  gap: 14px;
  min-width: 0;
}

.brand {
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 42px;
  padding: 0;
  background:
    radial-gradient(circle at 28% 18%, rgba(118, 245, 236, 0.26), transparent 36%),
    linear-gradient(135deg, #061228 0%, #081a3a 54%, #0b122c 100%);
  border: 1px solid rgba(159, 232, 244, 0.42);
  border-radius: 12px;
  overflow: hidden;
  box-shadow:
    0 10px 22px rgba(0, 0, 0, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.brand-mark img {
  display: block;
  width: 72%;
  height: 72%;
  object-fit: contain;
  object-position: center;
  transform: none;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.32));
}

.brand > span:last-child {
  color: #fff;
  font-size: 16px;
  text-shadow: 0 0 18px rgba(159, 232, 244, 0.22);
}

.nav-links {
  justify-content: center;
  gap: clamp(18px, 3vw, 36px);
  font-size: 14px;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.82);
}

.nav-links a:hover {
  color: #fff;
}

.nav-links a[href="./video.html"] {
  color: #9fe8f4;
}

.nav-action,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-action {
  color: #071113;
  background: #fff;
  font-size: 14px;
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 82vh;
  overflow: hidden;
  color: #fff;
  background: var(--charcoal);
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(7, 17, 19, 0.92) 0%, rgba(7, 17, 19, 0.72) 42%, rgba(7, 17, 19, 0.22) 100%),
    linear-gradient(0deg, rgba(7, 17, 19, 0.65) 0%, rgba(7, 17, 19, 0) 40%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(760px, calc(100% - 36px));
  margin-left: clamp(18px, 7vw, 96px);
  padding-top: 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-title-row {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 24px);
  flex-wrap: wrap;
}

.hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(54px, 8vw, 108px);
  line-height: 0.98;
  font-weight: 900;
}

.ai-brand-badges {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: clamp(6px, 1.2vw, 16px);
}

.header-ai-badges {
  gap: 8px;
  padding-top: 0;
  flex-wrap: nowrap;
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 7px 13px 7px 7px;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  box-shadow:
    0 14px 34px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
}

.header-ai-badges .ai-badge {
  min-height: 34px;
  padding: 5px 10px 5px 5px;
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(159, 232, 244, 0.22);
}

.badge-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.header-ai-badges .badge-mark {
  width: 24px;
  height: 24px;
  font-size: 9px;
}

.badge-text {
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.gpt-badge .badge-mark {
  color: #061f1d;
  background: linear-gradient(135deg, #eafff9, #55dcc0);
}

.seedance-badge .badge-mark {
  color: #081326;
  background: linear-gradient(135deg, #fef4ca, #65d7ff 48%, #8da4ff);
}

.hero-copy {
  max-width: 620px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions,
.contact-actions {
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.primary-button {
  color: #071113;
  background: linear-gradient(135deg, #f7ffff, #69d7e8);
}

.secondary-button {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.09);
}

.section {
  padding: clamp(58px, 8vw, 100px) clamp(18px, 5vw, 64px);
}

.section-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.intro-band {
  padding-top: 26px;
  padding-bottom: 26px;
  background: var(--charcoal);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.metric-card {
  appearance: none;
  display: block;
  min-height: 108px;
  width: 100%;
  padding: 22px;
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border: 0;
  border-radius: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.metric-card:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.metrics strong {
  display: block;
  color: #fff;
  font-size: 30px;
  line-height: 1;
}

.metrics span {
  display: block;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.72);
}

.section-heading {
  display: grid;
  gap: 12px;
  max-width: 720px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 820px;
}

.section-heading h2,
.split h2,
.contact-inner h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.15;
}

.section-heading p:not(.eyebrow),
.contact-inner p:not(.eyebrow) {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.product-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
}

.product-tabs {
  display: grid;
  gap: 10px;
}

.product-tab {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 70px;
  padding: 12px;
  color: var(--text);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.product-tab.active {
  color: #fff;
  background: var(--charcoal);
  border-color: var(--charcoal);
  box-shadow: var(--shadow);
}

.tab-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--cyan);
  background: #fff;
  border-radius: 8px;
  font-size: 13px;
}

.product-panel {
  min-height: 310px;
  padding: clamp(28px, 5vw, 54px);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(22, 184, 213, 0.24), transparent 42%),
    linear-gradient(315deg, rgba(69, 193, 122, 0.18), transparent 44%),
    var(--charcoal);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel-kicker {
  display: inline-flex;
  padding: 8px 12px;
  color: var(--cyan);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.product-panel h3 {
  margin: 24px 0 14px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.15;
}

.product-panel p {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 17px;
  line-height: 1.85;
}

.panel-points,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.panel-points {
  margin-top: 22px;
}

.panel-points span,
.chip-row span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}

.panel-points span {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 34px;
}

.feature-grid span {
  min-height: 48px;
  padding: 13px 12px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  text-align: center;
}

.video-studio-section {
  background:
    radial-gradient(circle at top left, rgba(22, 184, 213, 0.1), transparent 34%),
    linear-gradient(180deg, #f8fbfb 0%, #edf5f4 100%);
}

.video-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
}

.studio-lead-card,
.detail-panel {
  padding: clamp(28px, 4vw, 38px);
  background: #fff;
  border: 1px solid rgba(16, 32, 36, 0.08);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.studio-lead-card {
  background:
    linear-gradient(135deg, rgba(7, 17, 19, 0.98), rgba(9, 36, 41, 0.96)),
    #071113;
  color: #fff;
}

.studio-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  color: #071113;
  background: linear-gradient(135deg, #dffcff, #6fe0eb);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.studio-lead-card h3,
.detail-panel h3 {
  margin: 18px 0 12px;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.2;
}

.studio-lead-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.85;
}

.chip-row {
  margin-top: 24px;
}

.chip-row span {
  color: #dffcff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

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

.flow-step,
.capability-card {
  padding: 22px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(16, 32, 36, 0.08);
  border-radius: 18px;
}

.flow-index {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: #071113;
  background: linear-gradient(135deg, #dffcff, #45c17a);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 900;
}

.flow-step h3,
.capability-card h3 {
  margin: 16px 0 8px;
  color: var(--ink);
  font-size: 22px;
}

.flow-step p,
.capability-card p,
.detail-panel p,
.detail-list li,
.integration-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.video-capability-grid,
.video-detail-grid,
.integration-grid {
  display: grid;
  gap: 18px;
}

.video-capability-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 22px;
}

.capability-card {
  min-height: 100%;
  background: #fff;
}

.capability-kicker {
  margin: 0;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.video-detail-grid {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  margin-top: 22px;
}

.detail-list {
  margin: 18px 0 0;
  padding-left: 18px;
}

.detail-list li + li {
  margin-top: 12px;
}

.integration-panel {
  background:
    linear-gradient(180deg, rgba(22, 184, 213, 0.08), rgba(69, 193, 122, 0.05)),
    #fff;
}

.integration-grid {
  grid-template-columns: 1fr;
  margin-top: 18px;
}

.integration-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 18px;
}

.module-cta {
  margin-top: 26px;
}

.section-actions {
  margin-top: 26px;
}

.muted {
  background: var(--soft);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.info-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  font-size: 22px;
}

.info-card h3 {
  margin: 22px 0 10px;
  color: var(--ink);
  font-size: 22px;
}

.info-card p,
.scenario-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: clamp(28px, 6vw, 80px);
  align-items: start;
}

.scenario-list {
  display: grid;
  gap: 16px;
}

.scenario-list p {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.scenario-list strong {
  color: var(--ink);
}

.contact-section {
  padding: clamp(70px, 9vw, 118px) clamp(18px, 5vw, 64px);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(22, 184, 213, 0.28), transparent 36%),
    linear-gradient(315deg, rgba(224, 107, 92, 0.2), transparent 42%),
    var(--charcoal);
}

.contact-inner {
  width: min(900px, 100%);
  margin: 0 auto;
  text-align: center;
}

.contact-inner h2 {
  color: #fff;
}

.contact-inner p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.75);
}

.contact-actions {
  justify-content: center;
}

.secondary-button.light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.34);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px clamp(18px, 5vw, 64px);
  color: rgba(255, 255, 255, 0.72);
  background: #050b0c;
  font-size: 14px;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .header-ai-badges .badge-text {
    display: none;
  }

  .header-ai-badges .ai-badge {
    padding-right: 5px;
  }

  .metrics,
  .advantage-grid,
  .split,
  .video-capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-layout {
    grid-template-columns: 1fr;
  }

  .video-overview,
  .video-detail-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 560px) {
  .metrics,
  .advantage-grid,
  .split,
  .video-capability-grid,
  .studio-flow {
    grid-template-columns: 1fr;
  }

  .site-header {
    min-height: 64px;
    padding: 12px 16px;
  }

  .nav-action {
    display: none;
  }

  .hero {
    min-height: 78vh;
  }

  .hero-content {
    width: calc(100% - 32px);
    margin-left: 16px;
  }

  .hero h1 {
    font-size: 52px;
  }

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

  .studio-lead-card,
  .detail-panel,
  .flow-step,
  .capability-card {
    border-radius: 16px;
  }

  .product-tab {
    min-height: 62px;
  }

  .site-footer {
    flex-direction: column;
  }
}