:root {
  color-scheme: light;
  --ink: #172432;
  --muted: #637083;
  --line: rgba(23, 36, 50, 0.12);
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --teal: #04a6b2;
  --teal-dark: #057986;
  --coral: #ff6f61;
  --green: #55b982;
  --yellow: #ffd166;
  --shadow: 0 22px 60px rgba(27, 52, 76, 0.18);
  --soft-shadow: 0 14px 38px rgba(27, 52, 76, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f7fbff;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: 100%;
  padding: 12px 6vw;
  border-bottom: 1px solid rgba(255, 255, 255, 0.58);
  background: rgba(248, 252, 255, 0.78);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.quick-stats,
.phone-status,
.phone-overlay,
.preview-card,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  color: var(--teal-dark);
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--coral));
  box-shadow: 0 10px 22px rgba(4, 166, 178, 0.22);
}

.nav-links {
  gap: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--teal-dark);
}

.header-action,
.primary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  font-weight: 800;
  white-space: nowrap;
}

.header-action {
  padding: 0 22px;
  color: #fff;
  background: var(--teal);
  box-shadow: 0 12px 24px rgba(4, 166, 178, 0.25);
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: calc(100svh - 86px);
  padding: 22px 6vw 34px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(
      115deg,
      rgba(249, 253, 255, 0.96) 0%,
      rgba(238, 250, 255, 0.9) 43%,
      rgba(255, 244, 239, 0.82) 100%
    ),
    url("../images/slides/live-red.jpg") center / cover;
}

.hero-bg::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.18)),
    repeating-linear-gradient(
      90deg,
      rgba(4, 166, 178, 0.08) 0,
      rgba(4, 166, 178, 0.08) 1px,
      transparent 1px,
      transparent 80px
    );
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(330px, 0.78fr);
  gap: 36px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
}

.hero-copy {
  padding: 34px 0 24px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal-dark);
  font-size: 0.92rem;
  font-weight: 800;
}

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

h1 {
  max-width: 620px;
  margin-bottom: 18px;
  font-size: 4rem;
  line-height: 1.04;
  font-weight: 900;
}

.hero-text {
  max-width: 600px;
  margin-bottom: 26px;
  color: #34475a;
  font-size: 1.2rem;
  line-height: 1.8;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
}

.primary-button {
  gap: 9px;
  padding: 0 26px;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), #11c8c1);
  box-shadow: 0 18px 36px rgba(4, 166, 178, 0.28);
}

.button-icon {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  font-size: 0.74rem;
}

.ghost-button {
  padding: 0 22px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.58);
}

.quick-stats {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.quick-stats span {
  padding: 9px 14px;
  border: 1px solid rgba(4, 166, 178, 0.18);
  border-radius: 999px;
  color: #24545d;
  background: rgba(255, 255, 255, 0.62);
  font-size: 0.9rem;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  display: grid;
  min-height: 548px;
  place-items: center;
}

.phone-shell {
  position: relative;
  width: min(286px, 82vw);
  aspect-ratio: 9 / 18.4;
  border: 12px solid #172432;
  border-radius: 42px;
  background: #172432;
  box-shadow: var(--shadow);
}

.phone-notch {
  position: absolute;
  top: -1px;
  left: 50%;
  z-index: 6;
  width: 116px;
  height: 26px;
  border-radius: 0 0 18px 18px;
  background: #172432;
  transform: translateX(-50%);
}

.phone-screen {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  border-radius: 28px;
  background: #0d131b;
}

.phone-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.03);
  transition:
    opacity 700ms ease,
    transform 1200ms ease;
}

.phone-slide.is-active {
  opacity: 1;
  transform: scale(1);
}

.phone-status {
  position: absolute;
  top: 30px;
  right: 30px;
  left: 30px;
  z-index: 5;
  justify-content: space-between;
  color: #fff;
  font-size: 0.73rem;
  font-weight: 800;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.24);
}

.phone-overlay {
  position: absolute;
  right: 26px;
  bottom: 28px;
  left: 26px;
  z-index: 5;
  gap: 9px;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  color: #fff;
  background: rgba(20, 30, 42, 0.46);
  backdrop-filter: blur(14px);
  font-size: 0.88rem;
  font-weight: 800;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 6px rgba(255, 111, 97, 0.22);
}

.floating-card,
.preview-card {
  position: absolute;
  z-index: 8;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--soft-shadow);
  backdrop-filter: blur(18px);
}

.floating-card {
  display: grid;
  gap: 3px;
  min-width: 158px;
  padding: 14px 16px;
}

.floating-card strong,
.preview-card strong {
  font-size: 0.95rem;
}

.floating-card small,
.preview-card small {
  color: var(--muted);
  font-size: 0.78rem;
}

.mini-icon {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 10px;
  color: #fff;
  background: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
}

.card-speed {
  top: -27px;
  left: 4px;
}

.card-global {
    right: -14px;
    top: 189px;
}

.card-global .mini-icon {
  background: var(--coral);
}

.preview-card {
  bottom: 26px;
  left: 0;
  gap: 12px;
  width: min(278px, 78vw);
  padding: 10px;
}

.preview-card img {
  width: 76px;
  height: 58px;
  border-radius: 12px;
  object-fit: cover;
}

.play-chip {
  display: grid;
  width: 36px;
  height: 36px;
  margin-left: auto;
  place-items: center;
  border-radius: 999px;
  color: #fff;
  background: var(--teal);
  font-size: 0.78rem;
}

.content-band,
.benefits {
  padding: 78px 6vw;
}

.content-band {
  background: #fff;
}

.section-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 32px;
}

.section-heading.compact {
  margin-bottom: 24px;
}

.section-heading h2,
.final-cta h2 {
  margin-bottom: 14px;
  font-size: 2.6rem;
  line-height: 1.15;
}

.section-heading p,
.final-cta p,
.benefit-item p {
  color: var(--muted);
  line-height: 1.75;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.content-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(27, 52, 76, 0.08);
}

.content-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.feature-live img {
  object-position: 50% 22%;
}

.feature-chat img {
  object-position: 50% 45%;
}

.feature-relax img {
  object-position: 50% 35%;
}

.content-card div {
  padding: 18px;
}

.content-card span {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--teal-dark);
  font-size: 0.86rem;
  font-weight: 800;
}

.content-card h3 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.35;
}

.benefits {
  background:
    linear-gradient(180deg, rgba(244, 251, 255, 0.9), rgba(255, 248, 244, 0.96)),
    #f7fbff;
}

.benefit-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.benefit-item {
  min-height: 214px;
  padding: 24px;
  border: 1px solid rgba(23, 36, 50, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.benefit-icon {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--coral), var(--yellow));
  font-weight: 900;
}

.benefit-item:nth-child(2) .benefit-icon {
  background: linear-gradient(135deg, var(--teal), var(--green));
}

.benefit-item:nth-child(3) .benefit-icon {
  background: linear-gradient(135deg, #5169d8, var(--teal));
}

.benefit-item:nth-child(4) .benefit-icon {
  background: linear-gradient(135deg, var(--green), var(--yellow));
}

.benefit-item h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
}

.benefit-item p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1fr);
  gap: 42px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: 84px 6vw 88px;
}

.cta-media {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.cta-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 18%;
}

.cta-copy {
  max-width: 560px;
}

.cta-copy p {
  margin-bottom: 24px;
}

.site-footer {
  justify-content: space-between;
  gap: 18px;
  padding: 24px 6vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 20px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .hero-copy {
    max-width: 720px;
    padding-top: 18px;
  }

  h1 {
    font-size: 3.05rem;
  }

  .hero-visual {
    min-height: 560px;
  }

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

  .final-cta {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    gap: 12px;
    padding: 12px 18px;
  }

  .brand {
    font-size: 0.96rem;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    border-radius: 9px;
  }

  .header-action {
    min-height: 38px;
    padding: 0 14px;
    font-size: 0.88rem;
  }

  .hero {
    min-height: auto;
    padding: 20px 18px 44px;
  }

  .hero-copy {
    text-align: left;
  }

  h1 {
    font-size: 2.22rem;
  }

  .hero-text {
    margin-bottom: 18px;
    font-size: 0.98rem;
    line-height: 1.62;
  }

  .hero-actions {
    align-items: center;
    flex-direction: row;
    gap: 10px;
  }

  .primary-button,
  .ghost-button {
    flex: 1;
    width: auto;
    min-height: 42px;
    padding: 0 10px;
    font-size: 0.88rem;
  }

  .button-icon {
    display: none;
  }

  .quick-stats {
    display: none;
  }

  .hero-visual {
    min-height: 390px;
  }

  .phone-shell {
    border-width: 10px;
    border-radius: 32px;
  }

  .phone-screen {
    border-radius: 21px;
  }

  .floating-card {
    min-width: 132px;
    padding: 12px;
  }

  .floating-card strong,
  .preview-card strong {
    font-size: 0.82rem;
  }

  .floating-card small,
  .preview-card small {
    font-size: 0.72rem;
  }

  .card-speed {
    top: -36px;
    left: -2px;
  }

  .card-global {
    right: -14px;
    top: 189px;
  }

  .preview-card {
    bottom: -43px;
    width: min(250px, 82vw);
  }

  .content-band,
  .benefits {
    padding: 56px 18px;
  }

  .section-heading h2,
  .final-cta h2 {
    font-size: 2rem;
  }

  .content-grid,
  .benefit-list {
    grid-template-columns: 1fr;
  }

  .benefit-item {
    min-height: auto;
  }

  .final-cta {
    padding: 58px 18px 66px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .phone-slide {
    transition: none;
  }
}