:root {
  --text: #f8fbff;
  --muted: rgba(236, 244, 255, 0.78);
  --line: rgba(255, 255, 255, 0.16);
  --accent: #79e2ff;
  --accent-soft: #ffd679;
  --shadow: 0 22px 80px rgba(0, 0, 0, 0.28);
  --header-height: 92px;
  --footer-height: 56px;
  --shell-width: min(100vw - 48px, 1240px);
  --active-slide-image: url("assets/carousel/slide-1.jpg");
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100svh;
  overflow: hidden;
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 12%, rgba(121, 226, 255, 0.28), transparent 18%),
    radial-gradient(circle at 84% 14%, rgba(255, 214, 121, 0.26), transparent 16%),
    linear-gradient(180deg, #0d1830 0%, #163c82 44%, #1b2d63 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.06;
  pointer-events: none;
}

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

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

.page-shell {
  width: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 20;
  transform: translateX(-50%);
  width: var(--shell-width);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 50px;
  height: 50px;
  border-radius: 18px;
  box-shadow: 0 12px 26px rgba(121, 226, 255, 0.24);
}

.brand-copy {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}

.brand-copy strong {
  font-size: 1.06rem;
  letter-spacing: 0.04em;
}

.brand-copy span,
.header-note {
  font-size: 0.9rem;
  color: var(--muted);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.header-contact-button {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  cursor: pointer;
}

.hero-screen {
  min-height: 100svh;
}

.carousel-shell {
  position: relative;
  min-height: 100svh;
}

.carousel-stage {
  position: relative;
  min-height: calc(100svh - var(--footer-height));
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 520ms ease, transform 700ms ease;
}

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

.slide-visual {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(8, 14, 35, 0.76) 0%, rgba(8, 14, 35, 0.44) 34%, rgba(8, 14, 35, 0.18) 58%, rgba(8, 14, 35, 0.48) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(6, 10, 24, 0.1) 30%, rgba(6, 10, 24, 0.55) 100%),
    var(--slide-image);
  background-position: center;
  background-size: cover;
}

.slide-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 16% 18%, rgba(121, 226, 255, 0.24), transparent 18%),
    radial-gradient(circle at 84% 22%, rgba(255, 214, 121, 0.22), transparent 15%);
}

.slide-content {
  position: relative;
  z-index: 2;
  width: var(--shell-width);
  min-height: calc(100svh - var(--footer-height));
  margin: 0 auto;
  padding: calc(var(--header-height) + 28px) 0 calc(var(--footer-height) + 28px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 520px;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  color: rgba(248, 251, 255, 0.66);
}

.slide-content h1,
.slide-content h2 {
  margin: 0;
  font-size: clamp(3rem, 6.6vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.slide-content h2 {
  font-size: clamp(2.4rem, 5.2vw, 4.3rem);
}

.hero-text {
  max-width: 520px;
  margin: 22px 0 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--muted);
}

.hero-actions,
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-tags span {
  padding: 11px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(248, 251, 255, 0.84);
}

.primary-link,
.secondary-link,
.carousel-control,
.carousel-dot,
.header-contact-button {
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    opacity 180ms ease;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 600;
}

.primary-link {
  color: #0f2858;
  background: linear-gradient(135deg, var(--accent) 0%, #a1eeff 100%);
  box-shadow: 0 14px 36px rgba(121, 226, 255, 0.28);
}

.secondary-link {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
}

.primary-link:hover,
.secondary-link:hover,
.carousel-control:hover,
.carousel-dot:hover,
.header-contact-button:hover {
  transform: translateY(-2px);
}

.carousel-ui {
  position: fixed;
  right: max(24px, calc((100vw - var(--shell-width)) / 2));
  bottom: calc(var(--footer-height) + 26px);
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 14px;
}

.carousel-control {
  width: 52px;
  height: 52px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(10, 16, 40, 0.42);
  color: var(--text);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.carousel-control span {
  font-size: 1.16rem;
}

.carousel-dots {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px;
}

.carousel-dot {
  width: 11px;
  height: 11px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.26);
  cursor: pointer;
}

.carousel-dot.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  transform: scale(1.22);
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 14;
  min-height: var(--footer-height);
  padding: 5px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, rgba(9, 14, 35, 0.46) 0%, rgba(9, 14, 35, 0.82) 100%),
    var(--active-slide-image);
  background-size: cover;
  background-position: center;
  filter: blur(28px) saturate(1.18);
  transform: scale(1.12);
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(8, 14, 36, 0.84);
}

.footer-bar {
  position: relative;
  z-index: 1;
  width: var(--shell-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto auto minmax(220px, 1fr) auto;
  align-items: center;
  gap: 18px;
}

.footer-brand-inline,
.footer-links-inline,
.footer-record-inline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.footer-brand-inline strong {
  font-size: 0.95rem;
}

.footer-brand-inline span,
.footer-copy {
  color: rgba(248, 251, 255, 0.72);
  font-size: 0.84rem;
}

.footer-links-inline a,
.footer-record-inline span {
  color: rgba(248, 251, 255, 0.78);
  white-space: nowrap;
}

.footer-links-inline a:hover {
  color: #ffffff;
}

.footer-links-inline a + a::before,
.footer-record-inline span + span::before {
  content: "/";
  margin-right: 10px;
  color: rgba(248, 251, 255, 0.28);
}

.footer-record-inline {
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.footer-copy {
  justify-self: end;
  white-space: nowrap;
}

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 32;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.contact-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.contact-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 10, 28, 0.62);
  backdrop-filter: blur(10px);
}

.contact-dialog {
  position: relative;
  z-index: 1;
  width: min(420px, calc(100vw - 28px));
  padding: 28px 24px 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(18, 31, 70, 0.92) 0%, rgba(10, 18, 42, 0.96) 100%);
  box-shadow: var(--shadow);
}

.contact-close {
  position: absolute;
  top: 10px;
  right: 14px;
  border: 0;
  background: transparent;
  color: rgba(248, 251, 255, 0.72);
  font-size: 1.8rem;
  cursor: pointer;
}

.contact-eyebrow {
  margin: 0;
  color: rgba(248, 251, 255, 0.58);
  letter-spacing: 0.2em;
  font-size: 0.76rem;
}

.contact-dialog h2 {
  margin: 12px 0 0;
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.contact-copy {
  margin: 14px 0 0;
  color: rgba(248, 251, 255, 0.74);
  line-height: 1.8;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.contact-list a {
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

body.is-loaded .slide-content {
  animation: content-rise 700ms ease both;
}

@keyframes content-rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  :root {
    --shell-width: min(100vw - 28px, 980px);
    --header-height: 86px;
    --footer-height: 78px;
  }

  body {
    overflow-y: auto;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .header-note {
    font-size: 0.84rem;
  }

  .slide-content {
    justify-content: flex-start;
    padding-top: calc(var(--header-height) + 36px);
    padding-bottom: calc(var(--footer-height) + 70px);
  }

  .slide-content h1,
  .slide-content h2 {
    max-width: 10ch;
  }

  .carousel-ui {
    right: 14px;
    bottom: calc(var(--footer-height) + 18px);
  }

  .footer-bar {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 10px 16px;
  }

  .footer-record-inline,
  .footer-copy {
    justify-self: start;
  }

  .footer-copy {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  :root {
    --footer-height: 102px;
  }

  .brand-logo {
    width: 44px;
    height: 44px;
  }

  .slide-content h1,
  .slide-content h2 {
    font-size: clamp(2.25rem, 12vw, 3.6rem);
  }

  .hero-text {
    font-size: 0.96rem;
  }

  .hero-actions,
  .hero-tags {
    gap: 10px;
  }

  .primary-link,
  .secondary-link {
    width: 100%;
  }

  .carousel-ui {
    left: 14px;
    right: 14px;
    justify-content: space-between;
  }

  .carousel-dots {
    flex: 1;
    justify-content: center;
  }

  .site-footer {
    padding-bottom: 8px;
  }

  .footer-bar {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .footer-brand-inline,
  .footer-links-inline,
  .footer-record-inline,
  .header-actions {
    flex-wrap: wrap;
  }

  .footer-brand-inline span,
  .footer-copy,
  .footer-record-inline {
    font-size: 0.84rem;
  }
}