@import url("https://fonts.googleapis.com/css2?family=ZCOOL+XiaoWei&family=Noto+Sans+SC:wght@400;500;700&display=swap");

:root {
  --flux-ink: #0a1f24;
  --flux-teal: #0f6b6e;
  --flux-coral: #ff4b6e;
  --flux-coral-soft: #ffe3ea;
  --flux-mint: #1ec8b0;
  --flux-sand: #f3f6f8;
  --flux-paper: #ffffff;
  --flux-muted: #5a6b72;
  --flux-line: rgba(15, 107, 110, 0.14);
  --flux-shadow: 0 18px 40px rgba(10, 31, 36, 0.12);
  --flux-radius: 22px;
  --flux-max: 1080px;
  --flux-font-display: "ZCOOL XiaoWei", "Songti SC", serif;
  --flux-font-body: "Noto Sans SC", "PingFang SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--flux-font-body);
  color: var(--flux-ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(255, 75, 110, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(30, 200, 176, 0.12), transparent 50%),
    linear-gradient(180deg, #f7fbff 0%, var(--flux-sand) 40%, #eef5f4 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--flux-teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--flux-coral);
}

.flux-wrap {
  width: min(100% - 32px, var(--flux-max));
  margin-inline: auto;
}

.flux-skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.flux-skip:focus {
  left: 16px;
  top: 16px;
  z-index: 100;
  background: #fff;
  padding: 8px 12px;
}

/* Promo strip */
.flux-promo-shell {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--flux-line);
  padding: 10px 0;
}

.flux-promo {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
}

.flux-promo-item {
  width: 72px;
  text-align: center;
  text-decoration: none;
  color: var(--flux-muted);
  font-size: 11px;
}

.flux-promo-item img {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  margin: 0 auto 4px;
  box-shadow: 0 8px 18px rgba(10, 31, 36, 0.12);
  object-fit: cover;
  transition: transform 0.2s ease;
}

.flux-promo-item:hover img {
  transform: translateY(-3px) scale(1.04);
}

.flux-promo-item span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Header */
.flux-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--flux-line);
}

.flux-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.flux-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--flux-ink);
}

.flux-brand img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

.flux-brand strong {
  font-family: var(--flux-font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.flux-nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.flux-nav-links a {
  text-decoration: none;
  color: var(--flux-ink);
  font-weight: 500;
  font-size: 0.95rem;
}

.flux-nav-links a:hover {
  color: var(--flux-coral);
}

.flux-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--flux-line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}

.flux-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--flux-ink);
  transition: 0.2s;
}

/* Hero — no download CTA */
.flux-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 36px;
}

.flux-hero::before {
  content: "";
  position: absolute;
  inset: 8% -20% auto auto;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 75, 110, 0.22), transparent 68%);
  animation: flux-orb 8s ease-in-out infinite alternate;
  pointer-events: none;
}

.flux-hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.flux-hero-copy h1 {
  font-family: var(--flux-font-display);
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  line-height: 1.25;
  margin: 0 0 14px;
  color: var(--flux-ink);
}

.flux-hero-copy p {
  margin: 0;
  color: var(--flux-muted);
  font-size: 1.05rem;
  max-width: 34em;
}

.flux-hero-visual {
  position: relative;
  justify-self: center;
}

.flux-phone {
  width: min(260px, 70vw);
  border-radius: 28px;
  overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--flux-shadow);
  transform: rotate(-3deg);
  animation: flux-float 5.5s ease-in-out infinite;
}

.flux-phone img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
}

.flux-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.flux-chip {
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(15, 107, 110, 0.08);
  color: var(--flux-teal);
  border: 1px solid var(--flux-line);
}

/* Sections */
.flux-section {
  padding: 42px 0;
}

.flux-section + .flux-section {
  border-top: 1px dashed var(--flux-line);
}

.flux-kicker {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--flux-coral);
  margin-bottom: 8px;
}

.flux-section h2 {
  font-family: var(--flux-font-display);
  font-size: clamp(1.45rem, 3.5vw, 2rem);
  margin: 0 0 12px;
  line-height: 1.3;
}

.flux-section h3 {
  font-family: var(--flux-font-display);
  font-size: 1.2rem;
  margin: 22px 0 10px;
}

.flux-lead {
  color: var(--flux-muted);
  margin: 0 0 18px;
  max-width: 46em;
}

.flux-prose p {
  margin: 0 0 1em;
  text-align: justify;
}

.flux-prose p:last-child {
  margin-bottom: 0;
}

/* Zigzag media blocks */
.flux-zig {
  display: grid;
  gap: 22px;
  margin: 28px 0;
  align-items: center;
}

.flux-zig-media {
  border-radius: var(--flux-radius);
  overflow: hidden;
  box-shadow: var(--flux-shadow);
  background: #fff;
}

.flux-zig-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.flux-zig-body {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--flux-line);
  border-radius: var(--flux-radius);
  padding: 22px;
}

/* Mosaic cards */
.flux-mosaic {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.flux-tile {
  background: linear-gradient(145deg, #fff, #f8fcfb);
  border: 1px solid var(--flux-line);
  border-radius: var(--flux-radius);
  padding: 20px;
  box-shadow: 0 10px 28px rgba(10, 31, 36, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.flux-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--flux-shadow);
}

.flux-tile h3 {
  margin-top: 0;
}

.flux-tile p {
  margin: 0;
  color: var(--flux-muted);
  font-size: 0.96rem;
}

.flux-tile-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  background: var(--flux-coral-soft);
  color: var(--flux-coral);
  font-weight: 700;
}

/* Ribbon list */
.flux-ribbon {
  position: relative;
  padding-left: 22px;
  margin: 24px 0;
}

.flux-ribbon::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--flux-coral), var(--flux-mint));
}

.flux-ribbon-item {
  position: relative;
  margin-bottom: 18px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.78);
  border-radius: 16px;
  border: 1px solid var(--flux-line);
}

.flux-ribbon-item::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 22px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--flux-mint);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px rgba(30, 200, 176, 0.35);
}

/* Gallery strip */
.flux-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 22px 0;
}

.flux-gallery figure {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 22px rgba(10, 31, 36, 0.08);
}

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

.flux-gallery figcaption {
  padding: 8px 10px 12px;
  font-size: 0.82rem;
  color: var(--flux-muted);
}

/* CTA band — download allowed outside hero/nav */
.flux-cta {
  margin: 36px 0;
  padding: 28px 24px;
  border-radius: 28px;
  background:
    linear-gradient(125deg, rgba(15, 107, 110, 0.95), rgba(255, 75, 110, 0.88));
  color: #fff;
  text-align: center;
  box-shadow: var(--flux-shadow);
}

.flux-cta h2 {
  color: #fff;
  margin-bottom: 8px;
}

.flux-cta p {
  margin: 0 0 18px;
  opacity: 0.95;
}

.flux-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: #fff;
  color: var(--flux-ink);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease;
}

.flux-btn:hover {
  transform: translateY(-2px);
  color: var(--flux-coral);
}

/* Breadcrumb */
.flux-crumb {
  padding: 18px 0 0;
  font-size: 0.88rem;
  color: var(--flux-muted);
}

.flux-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.flux-crumb li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: #9aadb4;
}

.flux-crumb a {
  text-decoration: none;
}

/* Legal pages */
.flux-legal {
  padding: 12px 0 56px;
}

.flux-legal article {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--flux-line);
  border-radius: 24px;
  padding: 28px 22px;
  box-shadow: 0 12px 32px rgba(10, 31, 36, 0.06);
}

.flux-legal h1 {
  font-family: var(--flux-font-display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin: 0 0 12px;
}

.flux-legal h2 {
  font-family: var(--flux-font-display);
  font-size: 1.25rem;
  margin: 28px 0 10px;
}

.flux-legal p,
.flux-legal li {
  color: var(--flux-ink);
}

.flux-legal ul {
  padding-left: 1.2em;
}

/* Error pages */
.flux-error {
  min-height: 58vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 48px 16px;
}

.flux-error-code {
  font-family: var(--flux-font-display);
  font-size: clamp(4rem, 18vw, 7rem);
  line-height: 1;
  background: linear-gradient(120deg, var(--flux-teal), var(--flux-coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0;
}

.flux-error h1 {
  font-family: var(--flux-font-display);
  margin: 8px 0 12px;
}

.flux-error p {
  color: var(--flux-muted);
  max-width: 28em;
  margin: 0 auto 22px;
}

.flux-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.flux-ghost {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--flux-line);
  background: #fff;
  color: var(--flux-ink);
  text-decoration: none;
  font-weight: 500;
}

/* Footer */
.flux-footer {
  margin-top: 40px;
  padding: 36px 0 120px;
  background: var(--flux-ink);
  color: rgba(255, 255, 255, 0.82);
}

.flux-footer a {
  color: #9fe8dc;
  text-decoration: none;
}

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

.flux-footer-grid {
  display: grid;
  gap: 22px;
}

.flux-footer h2 {
  font-family: var(--flux-font-display);
  font-size: 1.2rem;
  color: #fff;
  margin: 0 0 10px;
}

.flux-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.flux-footer li {
  margin-bottom: 8px;
}

.flux-copy {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  opacity: 0.75;
}

/* Sticky download dock */
.flux-dock {
  position: fixed;
  left: 0;
  right: 0;
  top: 64px;
  z-index: 45;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--flux-line);
  padding: 8px 0;
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

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

body.flux-dock-open {
  scroll-padding-top: 160px;
}

body.flux-dock-open .flux-hero,
body.flux-dock-open .flux-crumb,
body.flux-dock-open .flux-error {
  margin-top: 72px;
}

.flux-dock-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
}

.flux-dock-item {
  width: calc(25% - 10px);
  max-width: 72px;
  text-align: center;
  text-decoration: none;
  color: var(--flux-muted);
  font-size: 10px;
}

.flux-dock-item img {
  width: 48px;
  height: 48px;
  margin: 0 auto 2px;
  border-radius: 14px;
  object-fit: cover;
}

.flux-dock-item span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Reveal */
.flux-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.flux-reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes flux-float {
  0%,
  100% {
    transform: rotate(-3deg) translateY(0);
  }
  50% {
    transform: rotate(-2deg) translateY(-10px);
  }
}

@keyframes flux-orb {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(-30px, 24px) scale(1.08);
  }
}

@media (min-width: 720px) {
  .flux-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .flux-zig {
    grid-template-columns: 1fr 1fr;
  }

  .flux-zig.is-flip .flux-zig-media {
    order: 2;
  }

  .flux-mosaic {
    grid-template-columns: repeat(3, 1fr);
  }

  .flux-gallery {
    grid-template-columns: repeat(4, 1fr);
  }

  .flux-footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .flux-dock-item {
    width: calc(12.5% - 10px);
  }

  .flux-legal article {
    padding: 36px 40px;
  }
}

@media (max-width: 719px) {
  .flux-nav-toggle {
    display: grid;
    place-items: center;
  }

  .flux-nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.96);
    padding: 12px 16px 18px;
    border-bottom: 1px solid var(--flux-line);
    gap: 0;
  }

  .flux-nav-links.is-open {
    display: flex;
  }

  .flux-nav-links li {
    border-bottom: 1px solid var(--flux-line);
  }

  .flux-nav-links a {
    display: block;
    padding: 12px 4px;
  }
}