/* ==========================================================================
   Cheap Go · 官网样式（App 暗色主题对齐）
   ==========================================================================
   Color reference (dark scheme, the app's DEFAULT):
     primary:              #8B93FF
     onPrimary:            #FFFFFF
     primaryContainer:     #1F253D
     onPrimaryContainer:   #DCE2FF
     secondary:            #32D9F5
     tertiary:             #C4B5FD
     tertiaryContainer:    #231D3F
     onTertiaryContainer:  #E8E0FF
     surface:              #0B0F14
     onSurface:            #E8ECF3
     onSurfaceVariant:     #94A3B8
     surfaceContainer:     #121826
     surfaceContainerHigh: #161D28
     surfaceContainerHighest:#1C2433
     outlineVariant:       rgba(255,255,255,0.08)
     KFC primary:          #E4002B
     KFC light:            #FF6B6B
     McDonald's primary:   #D52B1E
     McDonald's light:     #FF8A65
   ========================================================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #E8ECF3;
  background: #0B0F14;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* --- Container --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.80);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo__img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.logo__text {
  font-size: 18px;
  font-weight: 700;
  color: #E8ECF3;
}

.nav { display: flex; gap: 24px; }

.nav__link {
  font-size: 14px;
  font-weight: 600;
  color: #94A3B8;
  padding: 8px 16px;
  border-radius: 100px;
  transition: all 0.2s;
}

.nav__link:hover {
  color: #E8ECF3;
  background: rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(160deg, #0B0F14 0%, #121826 50%, #1F253D 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding: 120px 0 80px;
}

.hero__title {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  color: #E8ECF3;
  margin-bottom: 20px;
  max-width: 680px;
  letter-spacing: -0.02em;
}

.hero__highlight {
  background: linear-gradient(135deg, #8B93FF 0%, #C4B5FD 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: clamp(15px, 2vw, 17px);
  color: #94A3B8;
  max-width: 520px;
  line-height: 1.8;
  margin-bottom: 36px;
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.btn--primary {
  background: linear-gradient(135deg, #8B93FF 0%, #C4B5FD 100%);
  color: #0B0F14;
  box-shadow: 0 4px 24px rgba(139, 147, 255, 0.30);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139, 147, 255, 0.45);
}

/* --- Hero BG shapes --- */
.hero__bg {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__shape {
  position: absolute;
  border-radius: 50%;
}

.hero__shape--1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(139,147,255,0.12) 0%, transparent 70%);
  top: -160px; right: -120px;
}

.hero__shape--2 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(196,181,253,0.08) 0%, transparent 70%);
  bottom: -80px; right: 25%;
}

.hero__shape--3 {
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(139,147,255,0.06) 0%, transparent 70%);
  bottom: 30%; left: -40px;
}

/* ==========================================================================
   Section
   ========================================================================== */
.section { padding: 100px 0; }
.section--alt { background: #121826; }

.section__header {
  text-align: center;
  margin-bottom: 56px;
}

.section__title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: #E8ECF3;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.section__desc {
  font-size: 15px;
  color: #94A3B8;
}

/* ==========================================================================
   About
   ========================================================================== */
.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.about__card {
  background: #161D28;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: 40px 32px;
  transition: all 0.3s;
}

.about__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.30);
  border-color: rgba(139, 147, 255, 0.20);
}

.about__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1F253D, #231D3F);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: #8B93FF;
}

.about__icon svg { width: 26px; height: 26px; }

.about__card-title {
  font-size: 18px;
  font-weight: 700;
  color: #E8ECF3;
  margin-bottom: 10px;
}

.about__card-desc {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.75;
}

/* ==========================================================================
   Business
   ========================================================================== */
.business__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.business__item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  background: #161D28;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.3s;
}

.business__item:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  border-color: rgba(139, 147, 255, 0.15);
}

.business__brand {
  flex-shrink: 0;
  width: 72px; height: 72px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: #fff;
}

.business__brand--kfc {
  background: linear-gradient(135deg, #E4002B 0%, #FF6B6B 100%);
  box-shadow: 0 4px 16px rgba(228, 0, 43, 0.30);
}

.business__brand--mcd {
  background: linear-gradient(135deg, #D52B1E 0%, #FF8A65 100%);
  box-shadow: 0 4px 16px rgba(213, 43, 30, 0.30);
}

.business__brand--platform {
  background: linear-gradient(135deg, #8B93FF 0%, #C4B5FD 100%);
  color: #0B0F14;
  box-shadow: 0 4px 16px rgba(139, 147, 255, 0.25);
}

.business__info h3 {
  font-size: 17px;
  font-weight: 700;
  color: #E8ECF3;
  margin-bottom: 8px;
}

.business__info p {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.75;
}

/* ==========================================================================
   ICP
   ========================================================================== */
.icp__card {
  max-width: 600px;
  margin: 0 auto;
  background: #161D28;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
}

.icp__icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1F253D, #231D3F);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: #8B93FF;
}

.icp__icon svg { width: 30px; height: 30px; }

.icp__text {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.8;
  margin-bottom: 28px;
}

.icp__numbers {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.icp__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.icp__row:last-child { border-bottom: none; }

.icp__label {
  font-size: 13px;
  color: #94A3B8;
  font-weight: 500;
}

.icp__value {
  font-size: 14px;
  color: #E8ECF3;
  font-weight: 700;
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.contact__item {
  text-align: center;
  padding: 40px 24px;
  background: #161D28;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  transition: all 0.3s;
}

.contact__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.30);
  border-color: rgba(139, 147, 255, 0.20);
}

.contact__icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1F253D, #231D3F);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #8B93FF;
}

.contact__icon svg { width: 26px; height: 26px; }

.contact__item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #E8ECF3;
  margin-bottom: 8px;
}

.contact__item p {
  font-size: 14px;
  color: #94A3B8;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: #0B0F14;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: #94A3B8;
  padding: 48px 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__brand .logo__img {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

.footer__brand .logo__text {
  color: #E8ECF3;
  font-size: 16px;
}

.footer__icp a {
  font-size: 13px;
  color: #94A3B8;
  transition: color 0.2s;
}

.footer__icp a:hover { color: #C4B5FD; }

.footer__copyright { font-size: 12px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
  .nav { gap: 4px; }

  .nav__link {
    font-size: 12px;
    padding: 6px 10px;
  }

  .hero__inner { padding: 100px 0 60px; }
  .section { padding: 64px 0; }
  .section__header { margin-bottom: 36px; }

  .about__grid { gap: 16px; }
  .about__card { padding: 28px 24px; }

  .business__item { padding: 24px; gap: 16px; }
  .business__brand { width: 56px; height: 56px; }

  .icp__card { padding: 32px 24px; }

  .icp__row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

@media (max-width: 480px) {
  .header__inner {
    flex-direction: column;
    height: auto;
    padding: 12px 0;
    gap: 8px;
  }

  .nav { gap: 4px; flex-wrap: wrap; justify-content: center; }
  .hero__title { font-size: 28px; }
  .btn { width: 100%; text-align: center; }
}