:root {
  color-scheme: dark;
  --bg: #0d1117;
  --bg-deep: #090d12;
  --panel: rgba(19, 27, 38, 0.82);
  --panel-solid: #141d28;
  --line: rgba(226, 232, 240, 0.16);
  --text: #eef4f8;
  --muted: #aeb9c4;
  --soft: #d5dde5;
  --accent: #e44f88;
  --accent-2: #3dd6c6;
  --gold: #d9b45f;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.36);
  --radius: 8px;
  --container: min(1160px, calc(100% - 40px));
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(61, 214, 198, 0.12), transparent 32rem),
    linear-gradient(180deg, #0e131b 0%, #0d1117 42%, #10161e 100%);
  color: var(--text);
  line-height: 1.72;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent 70%);
  z-index: -1;
}

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

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

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 4px;
}

p {
  margin: 0 0 1rem;
  color: var(--soft);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  transform: translateY(-140%);
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(9, 13, 18, 0.66);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
  transition: background 0.24s ease, box-shadow 0.24s ease;
}

.site-header.is-scrolled {
  background: rgba(9, 13, 18, 0.92);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.25);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  object-fit: cover;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1.05rem;
  color: #fff;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  position: relative;
  padding: 10px 12px;
  color: #d9e2ea;
  font-size: 0.94rem;
  border-radius: 6px;
  overflow: hidden;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.site-nav .nav-download {
  margin-left: 8px;
  color: #fff;
  background: linear-gradient(135deg, rgba(228, 79, 136, 0.95), rgba(61, 214, 198, 0.82));
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 28px rgba(228, 79, 136, 0.18);
}

.site-nav .nav-download:hover {
  background: linear-gradient(135deg, #e44f88, #3dd6c6);
  box-shadow: 0 16px 34px rgba(61, 214, 198, 0.22), 0 12px 32px rgba(228, 79, 136, 0.2);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-toggle em {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.hero {
  min-height: 92vh;
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 140px 0 46px;
  background: var(--bg-deep);
}

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

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) brightness(0.72);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(8, 12, 18, 0.9) 0%, rgba(8, 12, 18, 0.64) 45%, rgba(8, 12, 18, 0.4) 100%),
    linear-gradient(0deg, rgba(9, 13, 18, 0.96) 0%, rgba(9, 13, 18, 0.08) 46%, rgba(9, 13, 18, 0.34) 100%);
}

.hero-scan {
  opacity: 0.2;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.08) 1px, transparent 1px, transparent 5px);
  mix-blend-mode: overlay;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1160px;
}

.eyebrow,
.section-kicker {
  color: var(--accent-2);
  text-transform: uppercase;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: 0.85rem;
}

.hero h1 {
  max-width: 860px;
  font-size: 4.55rem;
  color: var(--accent-2);
  background: linear-gradient(135deg, #ffffff 0%, #3dd6c6 44%, #e44f88 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
}

.hero-lead {
  max-width: 680px;
  margin: 1.25rem 0 0;
  font-size: 1.18rem;
  color: #e8eef4;
}

.hero-actions,
.cta-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-actions {
  margin-top: 2rem;
}

.btn {
  position: relative;
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 700;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.16);
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0%, rgba(255, 255, 255, 0.22) 42%, transparent 58%);
  transform: translateX(-120%);
  transition: transform 0.55s ease;
  z-index: -1;
}

.btn:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.32);
}

.btn:hover::before {
  transform: translateX(120%);
}

.btn.primary {
  background: linear-gradient(135deg, #e44f88, #bc3ed0);
  box-shadow: 0 18px 42px rgba(228, 79, 136, 0.28);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.btn.secondary {
  background: rgba(61, 214, 198, 0.16);
  border-color: rgba(61, 214, 198, 0.42);
}

.btn.large {
  min-width: 150px;
}

.btn-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 820px;
  margin: 2.4rem 0 0;
}

.hero-facts div {
  padding: 15px 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(12, 18, 25, 0.62);
  backdrop-filter: blur(12px);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.hero-facts div:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 214, 198, 0.42);
  background: rgba(16, 27, 38, 0.78);
}

.hero-facts dt {
  color: var(--muted);
  font-size: 0.78rem;
}

.hero-facts dd {
  margin: 4px 0 0;
  color: #fff;
  font-weight: 700;
}

.section {
  padding: 92px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2,
.section-copy h2,
.story-copy h2,
.cta-inner h2 {
  font-size: 2.32rem;
  color: var(--accent-2);
  background: linear-gradient(135deg, #f7fbff 0%, #3dd6c6 58%, #e44f88 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.two-column,
.story-grid,
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.78fr);
  gap: 42px;
  align-items: center;
}

.image-panel,
.wide-shot,
.gallery-item {
  margin: 0;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.image-panel img,
.wide-shot img,
.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.5s ease;
}

.image-panel:hover img,
.wide-shot:hover img,
.gallery-item:hover img {
  transform: scale(1.035);
  filter: saturate(1.06);
}

figcaption {
  padding: 13px 15px;
  color: var(--muted);
  font-size: 0.92rem;
}

.feature-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card,
.guide-summary,
.accordion-list,
.faq-list article,
.timeline-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.14);
}

.feature-card {
  min-height: 242px;
  padding: 22px;
  position: relative;
  overflow: hidden;
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease, background 0.24s ease;
}

.feature-card::before,
.timeline-item::before,
.faq-list article::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(61, 214, 198, 0.12), rgba(228, 79, 136, 0.1));
  opacity: 0;
  transition: opacity 0.24s ease;
  pointer-events: none;
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: auto 16px 0 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0.65;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(61, 214, 198, 0.34);
  background: rgba(22, 33, 45, 0.9);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.28);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card:hover .card-index {
  color: #fff;
  border-color: rgba(228, 79, 136, 0.5);
  background: rgba(228, 79, 136, 0.16);
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border: 1px solid rgba(61, 214, 198, 0.35);
  border-radius: 8px;
  color: var(--accent-2);
  background: rgba(61, 214, 198, 0.08);
  font-weight: 800;
  transition: color 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.feature-card h3,
.guide-summary h3,
.faq-list h3,
.timeline-item h3 {
  color: #fff;
  font-size: 1.12rem;
  margin-bottom: 0.6rem;
}

.feature-card p,
.timeline-item p,
.faq-list p {
  font-size: 0.98rem;
}

.story-band {
  padding: 82px 0;
  background:
    linear-gradient(90deg, rgba(228, 79, 136, 0.08), rgba(61, 214, 198, 0.05)),
    #101720;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 1.3rem 0 0;
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--soft);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-2);
  font-weight: 800;
}

.guide-layout {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.guide-summary {
  position: sticky;
  top: 96px;
  padding: 24px;
}

.guide-summary ol {
  margin: 0;
  padding-left: 1.35rem;
  color: var(--soft);
}

.guide-summary li + li {
  margin-top: 0.5rem;
}

.accordion-list {
  overflow: hidden;
}

.accordion-item + .accordion-item {
  border-top: 1px solid var(--line);
}

.accordion-item button {
  width: 100%;
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 0;
  background: transparent;
  color: #fff;
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.accordion-item button:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-2);
}

.accordion-item button::after {
  content: "+";
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-2);
  flex: 0 0 auto;
}

.accordion-item.open button::after {
  content: "−";
}

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.28s ease;
}

.accordion-panel > p {
  overflow: hidden;
  margin: 0;
  padding: 0 20px;
}

.accordion-item.open .accordion-panel {
  grid-template-rows: 1fr;
}

.accordion-item.open .accordion-panel > p {
  padding-bottom: 20px;
}

.gallery-section {
  background: #0e141c;
}

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

.gallery-grid .gallery-item {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.gallery-grid .gallery-item img {
  height: auto;
  aspect-ratio: 16 / 9;
}

.gallery-grid .gallery-item figcaption {
  flex: 1;
  display: flex;
  align-items: center;
}

.gallery-item.logo-card {
  display: grid;
  align-content: center;
  justify-items: center;
  background: linear-gradient(180deg, rgba(61, 214, 198, 0.09), rgba(228, 79, 136, 0.08));
}

.gallery-item.logo-card img {
  width: min(62%, 220px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 8px;
  margin-top: 24px;
}

.gallery-grid .gallery-item {
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.gallery-grid .gallery-item:hover {
  transform: translateY(-7px);
  border-color: rgba(228, 79, 136, 0.38);
  box-shadow: 0 28px 62px rgba(0, 0, 0, 0.34);
}

.updates-section {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    var(--bg);
}

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

.timeline-item {
  position: relative;
  padding: 20px;
  border-left: 3px solid var(--accent);
  overflow: hidden;
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.timeline-item:hover {
  transform: translateY(-5px);
  border-color: rgba(228, 79, 136, 0.5);
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.24);
}

.timeline-item:hover::before {
  opacity: 1;
}

.timeline-item time {
  display: inline-flex;
  margin-bottom: 0.65rem;
  color: var(--gold);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.faq-grid {
  align-items: start;
}

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

.faq-list article {
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.faq-list article:hover {
  transform: translateY(-5px);
  border-color: rgba(61, 214, 198, 0.34);
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.22);
}

.faq-list article:hover::before {
  opacity: 1;
}

.download-cta {
  padding: 64px 0;
}

.cta-inner {
  justify-content: space-between;
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(228, 79, 136, 0.18), rgba(61, 214, 198, 0.11)),
    var(--panel-solid);
  box-shadow: var(--shadow);
}

.cta-inner p {
  max-width: 660px;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: #090d12;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner strong {
  color: #fff;
}

.footer-inner p {
  margin: 0.35rem 0 0;
  font-size: 0.93rem;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner a {
  color: var(--muted);
}

.footer-inner a:hover {
  color: #fff;
}

.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(20, 29, 40, 0.9);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  backdrop-filter: blur(12px);
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  :root {
    --container: min(100% - 28px, 760px);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 14px;
    right: 14px;
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(9, 13, 18, 0.96);
    box-shadow: var(--shadow);
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .site-nav a {
    padding: 13px 12px;
  }

  .site-nav .nav-download {
    margin-left: 0;
    margin-top: 6px;
    text-align: center;
  }

  .hero {
    min-height: 840px;
    padding-top: 118px;
  }

  .hero h1 {
    font-size: 3.05rem;
  }

  .section-heading h2,
  .section-copy h2,
  .story-copy h2,
  .cta-inner h2 {
    font-size: 2.05rem;
  }

  .hero-facts,
  .feature-grid,
  .two-column,
  .story-grid,
  .guide-layout,
  .faq-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .guide-summary {
    position: static;
  }

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

@media (max-width: 620px) {
  .header-inner {
    min-height: 66px;
  }

  .brand img {
    width: 44px;
    height: 44px;
  }

  .brand small {
    display: none;
  }

  .hero {
    min-height: 760px;
    padding-bottom: 34px;
  }

  .hero h1 {
    font-size: 2.18rem;
  }

  .hero-lead {
    font-size: 1.03rem;
  }

  .section-heading h2,
  .section-copy h2,
  .story-copy h2,
  .cta-inner h2 {
    font-size: 1.72rem;
  }

  .hero-bg {
    object-position: 58% center;
  }

  .hero-actions,
  .cta-inner {
    align-items: stretch;
  }

  .hero-actions .btn,
  .cta-inner .btn {
    width: 100%;
  }

  .hero-facts {
    gap: 10px;
  }

  .section {
    padding: 68px 0;
  }

  .feature-card {
    min-height: auto;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}