/* mica — bicac.lat exclusive stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@600;700&family=ZCOOL+XiaoWei&display=swap');

:root {
  --mica-fog: #eef7f9;
  --mica-paper: #f8fcfd;
  --mica-ink: #12202a;
  --mica-mute: #4a5d6a;
  --mica-teal: #0f9ea8;
  --mica-teal-deep: #0a636b;
  --mica-coral: #ff5c6c;
  --mica-amber: #f0a35e;
  --mica-line: rgba(15, 158, 168, 0.18);
  --mica-glass: rgba(255, 255, 255, 0.62);
  --mica-shadow: 0 18px 40px rgba(18, 32, 42, 0.08);
  --mica-radius: 22px;
  --mica-nav-h: 64px;
  --mica-dock-gap: 12px;
  --mica-max: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans SC', sans-serif;
  color: var(--mica-ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(15, 158, 168, 0.16), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 92, 108, 0.12), transparent 55%),
    linear-gradient(180deg, #eaf5f7 0%, var(--mica-paper) 28%, #f4fafb 100%);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

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

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

/* top promo band */
.mica-promo {
  background: linear-gradient(90deg, rgba(15, 158, 168, 0.1), rgba(255, 92, 108, 0.08));
  border-bottom: 1px solid var(--mica-line);
  padding: 10px 0 6px;
}

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

.mica-promo-item {
  width: 72px;
  text-align: center;
}

.mica-promo-item a {
  display: block;
  text-decoration: none;
}

.mica-promo-item img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 8px 18px rgba(18, 32, 42, 0.12);
  margin-inline: auto;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mica-promo-item img:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 24px rgba(18, 32, 42, 0.16);
}

.mica-promo-item span {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: var(--mica-mute);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* navigation */
.mica-nav {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(248, 252, 253, 0.82);
  border-bottom: 1px solid var(--mica-line);
  height: var(--mica-nav-h);
}

.mica-nav-row {
  height: var(--mica-nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

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

.mica-brand strong {
  font-family: 'ZCOOL XiaoWei', 'Noto Serif SC', serif;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  font-weight: 400;
}

.mica-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mica-menu a {
  text-decoration: none;
  color: var(--mica-mute);
  font-size: 0.92rem;
  font-weight: 500;
}

.mica-menu a:hover,
.mica-menu a.is-on {
  color: var(--mica-teal-deep);
}

.mica-burger {
  display: none;
  border: 0;
  background: transparent;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
}

.mica-burger span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--mica-ink);
  border-radius: 2px;
}

/* sticky download dock */
.mica-dock {
  position: sticky;
  top: var(--mica-nav-h);
  z-index: 70;
  display: none;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--mica-line);
  padding: 8px 0;
}

.mica-dock.is-show {
  display: block;
}

.mica-dock-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--mica-dock-gap);
  justify-items: center;
}

.mica-dock-item {
  width: 100%;
  max-width: 72px;
  text-align: center;
}

.mica-dock-item a {
  text-decoration: none;
}

.mica-dock-item img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  object-fit: cover;
  margin-inline: auto;
  box-shadow: 0 6px 14px rgba(18, 32, 42, 0.1);
}

.mica-dock-item span {
  display: block;
  margin-top: 3px;
  font-size: 10px;
  color: var(--mica-mute);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* hero */
.mica-hero {
  position: relative;
  padding: 48px 0 36px;
  overflow: hidden;
}

.mica-hero::before {
  content: '';
  position: absolute;
  inset: 8% -20% auto auto;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(15, 158, 168, 0.22), transparent 68%);
  pointer-events: none;
  animation: mica-drift 9s ease-in-out infinite alternate;
}

.mica-hero::after {
  content: '';
  position: absolute;
  inset: auto auto -10% -15%;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 92, 108, 0.16), transparent 70%);
  pointer-events: none;
  animation: mica-drift 11s ease-in-out infinite alternate-reverse;
}

@keyframes mica-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(24px, -18px) scale(1.08); }
}

.mica-hero-panel {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: center;
}

.mica-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--mica-teal-deep);
  letter-spacing: 0.08em;
}

.mica-kicker::before {
  content: '';
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--mica-teal), var(--mica-coral));
}

.mica-hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.7rem, 5vw, 2.55rem);
  line-height: 1.35;
  margin: 10px 0 14px;
  font-weight: 700;
}

.mica-hero-lead {
  font-size: 1.05rem;
  color: var(--mica-mute);
  max-width: 38em;
  margin: 0;
}

.mica-hero-visual {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--mica-shadow);
  isolation: isolate;
}

.mica-hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: top center;
  transform: scale(1.01);
  animation: mica-softzoom 12s ease-in-out infinite alternate;
}

@keyframes mica-softzoom {
  from { transform: scale(1.01); }
  to { transform: scale(1.06); }
}

.mica-hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(18, 32, 42, 0.35));
  pointer-events: none;
}

.mica-glow-bar {
  height: 4px;
  width: 120px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mica-teal), var(--mica-amber), var(--mica-coral));
  margin: 18px 0 0;
  animation: mica-sheen 2.8s linear infinite;
  background-size: 200% 100%;
}

@keyframes mica-sheen {
  from { background-position: 0% 50%; }
  to { background-position: 200% 50%; }
}

/* breadcrumb */
.mica-crumb {
  padding: 18px 0 6px;
  font-size: 0.88rem;
  color: var(--mica-mute);
}

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

.mica-crumb li:not(:last-child)::after {
  content: '/';
  margin-left: 6px;
  color: #9bb0bc;
}

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

/* sections */
.mica-section {
  padding: 42px 0;
}

.mica-section h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  margin: 0 0 14px;
  line-height: 1.4;
}

.mica-section h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.15rem;
  margin: 28px 0 10px;
  color: var(--mica-teal-deep);
}

.mica-lead {
  color: var(--mica-mute);
  margin: 0 0 22px;
  max-width: 46em;
}

.mica-prose p {
  margin: 0 0 1.05em;
  color: var(--mica-ink);
  font-size: 1rem;
}

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

/* split layouts */
.mica-split {
  display: grid;
  gap: 28px;
  align-items: center;
}

.mica-split.is-flip .mica-shot {
  order: -1;
}

.mica-shot {
  border-radius: var(--mica-radius);
  overflow: hidden;
  box-shadow: var(--mica-shadow);
  background: #fff;
  border: 1px solid var(--mica-line);
}

.mica-shot img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
}

.mica-glass {
  background: var(--mica-glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--mica-radius);
  padding: 22px 20px;
  box-shadow: var(--mica-shadow);
}

/* card grid */
.mica-cards {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.mica-card {
  background: #fff;
  border: 1px solid var(--mica-line);
  border-radius: 18px;
  padding: 20px 18px;
  box-shadow: 0 10px 28px rgba(18, 32, 42, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.mica-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(18, 32, 42, 0.1);
}

.mica-card h3 {
  margin-top: 0;
}

.mica-card p {
  margin: 0;
  color: var(--mica-mute);
  font-size: 0.96rem;
}

.mica-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  background: linear-gradient(135deg, rgba(15, 158, 168, 0.16), rgba(255, 92, 108, 0.12));
  color: var(--mica-teal-deep);
  font-weight: 700;
}

/* mosaic */
.mica-mosaic {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr 1fr;
}

.mica-mosaic .mica-shot:first-child {
  grid-column: 1 / -1;
}

/* ribbon band */
.mica-ribbon {
  margin: 10px 0;
  padding: 28px 0;
  background:
    linear-gradient(120deg, rgba(15, 158, 168, 0.12), rgba(240, 163, 94, 0.1) 50%, rgba(255, 92, 108, 0.1));
  border-block: 1px solid var(--mica-line);
}

.mica-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.mica-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--mica-line);
  font-size: 0.88rem;
  color: var(--mica-ink);
}

/* timeline */
.mica-timeline {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mica-timeline li {
  position: relative;
  padding-left: 28px;
}

.mica-timeline li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--mica-teal), var(--mica-coral));
  box-shadow: 0 0 0 4px rgba(15, 158, 168, 0.15);
}

/* faq */
.mica-faq details {
  background: #fff;
  border: 1px solid var(--mica-line);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.mica-faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--mica-ink);
}

.mica-faq p {
  margin: 10px 0 0;
  color: var(--mica-mute);
}

/* legal pages */
.mica-legal h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  margin: 8px 0 18px;
}

.mica-legal h2 {
  margin-top: 32px;
}

.mica-legal ul {
  padding-left: 1.2em;
  color: var(--mica-ink);
}

.mica-legal li {
  margin-bottom: 0.55em;
}

/* status pages */
.mica-status {
  min-height: 58vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 48px 0;
}

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

.mica-status h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.5rem;
  margin: 8px 0 12px;
}

.mica-status p {
  color: var(--mica-mute);
  margin: 0 0 22px;
}

.mica-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--mica-teal), var(--mica-teal-deep));
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(15, 158, 168, 0.28);
  transition: transform 0.2s ease;
}

.mica-btn:hover {
  transform: translateY(-2px);
}

.mica-btn.is-ghost {
  background: #fff;
  color: var(--mica-teal-deep) !important;
  border: 1px solid var(--mica-line);
  box-shadow: none;
}

.mica-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* footer */
.mica-foot {
  margin-top: 40px;
  padding: 36px 0 28px;
  border-top: 1px solid var(--mica-line);
  background: linear-gradient(180deg, transparent, rgba(15, 158, 168, 0.06));
}

.mica-foot-grid {
  display: grid;
  gap: 22px;
}

.mica-foot h2 {
  font-family: 'ZCOOL XiaoWei', serif;
  font-size: 1.35rem;
  margin: 0 0 8px;
  font-weight: 400;
}

.mica-foot p {
  margin: 0;
  color: var(--mica-mute);
  font-size: 0.92rem;
}

.mica-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mica-foot-links a {
  text-decoration: none;
  color: var(--mica-mute);
  font-size: 0.9rem;
}

.mica-copy {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--mica-line);
  font-size: 0.82rem;
  color: #7a8f9c;
}

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

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

/* desktop */
@media (min-width: 768px) {
  .mica-dock-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .mica-hero-panel {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
  }

  .mica-hero-visual img {
    aspect-ratio: 3 / 4;
  }

  .mica-split {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .mica-split.is-flip .mica-shot {
    order: 0;
  }

  .mica-split.is-flip .mica-copyblock {
    order: -1;
  }

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

  .mica-mosaic {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

  .mica-mosaic .mica-shot:first-child {
    grid-column: auto;
    grid-row: 1 / 3;
  }

  .mica-mosaic .mica-shot img {
    height: 100%;
  }

  .mica-foot-grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }
}

@media (max-width: 767px) {
  .mica-burger {
    display: block;
  }

  .mica-menu {
    display: none;
    position: absolute;
    top: var(--mica-nav-h);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--mica-line);
    padding: 14px 16px 18px;
    flex-direction: column;
  }

  .mica-menu.is-open {
    display: flex;
  }

  .mica-nav-row {
    position: relative;
  }
}