:root {
  color-scheme: light;
  font-family: 'Noto Sans SC', 'Microsoft YaHei', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #0f172a;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(32px, 8vw, 96px) clamp(16px, 6vw, 64px);
  background:
    radial-gradient(1200px circle at 15% 20%, rgba(59, 130, 246, 0.16), transparent 60%),
    radial-gradient(1000px circle at 85% 30%, rgba(244, 114, 182, 0.14), transparent 55%),
    #eef2f8;
}

.page {
  width: min(1024px, 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(20px, 4vw, 32px);
}

/* 轮播容器 */
.carousel-container {
  width: 100%;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 24px);
  position: relative;
}

/* 固定的白色容器 */
.portal-board {
  flex: 1;
  padding: clamp(40px, 5vw, 64px);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(245, 248, 255, 0.92));
  border-radius: clamp(28px, 5vw, 40px);
  box-shadow: 0 30px 80px -45px rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(148, 163, 184, 0.18);
  overflow: hidden;
}

/* 轮播内容区域 */
.carousel-wrapper {
  width: 100%;
  overflow: hidden;
  position: relative;
  isolation: isolate;
}

.carousel-track {
  display: flex;
  width: 200%;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.carousel-slide {
  width: 50%;
  flex-shrink: 0;
  display: flex;
  flex-direction: row;
  gap: clamp(20px, 4vw, 32px);
  padding: 4px;
}

/* 箭头按钮 */
.carousel-arrow {
  width: clamp(44px, 5vw, 56px);
  height: clamp(44px, 5vw, 56px);
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 255, 0.9));
  box-shadow: 0 8px 32px -8px rgba(15, 23, 42, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s ease;
  flex-shrink: 0;
  color: #475569;
}

.carousel-arrow:hover {
  background: linear-gradient(135deg, #fff, #f8faff);
  box-shadow: 0 12px 40px -8px rgba(15, 23, 42, 0.35);
  transform: scale(1.08);
  color: #1e40af;
}

.carousel-arrow svg {
  width: 24px;
  height: 24px;
}

.carousel-arrow--left {
  opacity: 0;
  pointer-events: none;
}

.carousel-arrow--right {
  opacity: 1;
}

/* 页面指示器 */
.carousel-dots {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(148, 163, 184, 0.4);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.carousel-dot:hover {
  background: rgba(59, 130, 246, 0.5);
}

.carousel-dot.active {
  background: #3b82f6;
  width: 28px;
  border-radius: 5px;
}

/* 卡片样式 */
.portal-card {
  flex: 1;
  min-width: 0;
  max-width: calc(50% - 16px);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 3vw, 24px);
  padding: clamp(24px, 4vw, 32px);
  border-radius: clamp(22px, 4vw, 28px);
  text-decoration: none;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 255, 0.92));
  border: 1px solid rgba(148, 163, 184, 0.15);
  box-shadow: 0 20px 50px -35px rgba(30, 41, 59, 0.75);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  color: inherit;
}

.portal-card--merchant {
  box-shadow: 0 22px 62px -34px rgba(236, 72, 153, 0.55);
  border-color: rgba(244, 114, 182, 0.24);
}

.portal-card--service {
  box-shadow: 0 16px 40px -30px rgba(16, 185, 129, 0.55);
  border-color: rgba(110, 231, 183, 0.24);
}

.portal-card--mall {
  box-shadow: 0 16px 40px -30px rgba(249, 115, 22, 0.55);
  border-color: rgba(253, 186, 116, 0.24);
}

.portal-card:hover,
.portal-card:focus-visible {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 28px 65px -30px rgba(30, 64, 175, 0.45);
}

.portal-card--merchant:hover,
.portal-card--merchant:focus-visible {
  border-color: rgba(236, 72, 153, 0.35);
  box-shadow: 0 32px 72px -28px rgba(219, 39, 119, 0.5);
}

.portal-card--service:hover,
.portal-card--service:focus-visible {
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: 0 20px 50px -25px rgba(5, 150, 105, 0.5);
}

.portal-card--mall:hover,
.portal-card--mall:focus-visible {
  border-color: rgba(249, 115, 22, 0.35);
  box-shadow: 0 20px 50px -25px rgba(234, 88, 12, 0.5);
}

.portal-card:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.4);
  outline-offset: 4px;
}

.portal-card__media {
  width: clamp(100px, 30%, 140px);
  aspect-ratio: 1;
  border-radius: clamp(18px, 3vw, 24px);
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.14), rgba(59, 130, 246, 0.06));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.12);
}

.portal-card--merchant .portal-card__media {
  background: linear-gradient(145deg, rgba(244, 114, 182, 0.16), rgba(244, 114, 182, 0.06));
  box-shadow: inset 0 0 0 1px rgba(244, 114, 182, 0.16);
}

.portal-card--service .portal-card__media {
  background: linear-gradient(145deg, rgba(110, 231, 183, 0.16), rgba(110, 231, 183, 0.06));
  box-shadow: inset 0 0 0 1px rgba(110, 231, 183, 0.16);
}

.portal-card--mall .portal-card__media {
  background: linear-gradient(145deg, rgba(253, 186, 116, 0.16), rgba(253, 186, 116, 0.06));
  box-shadow: inset 0 0 0 1px rgba(253, 186, 116, 0.16);
}

.portal-card__media img {
  width: 70%;
  height: auto;
}

.portal-card__body {
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 2vw, 16px);
  flex: 1;
}

.portal-card__title {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
}

.portal-card__desc {
  font-size: clamp(14px, 1.8vw, 16px);
  line-height: 1.6;
  color: #475569;
}

.portal-card__action {
  align-self: flex-start;
  padding: 10px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.2));
  color: #1d4ed8;
  font-weight: 600;
  font-size: 14px;
  transition: background 200ms ease, color 200ms ease;
  margin-top: auto;
}

.portal-card--merchant .portal-card__action {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.12), rgba(244, 114, 182, 0.22));
  color: #be185d;
}

.portal-card--service .portal-card__action {
  background: linear-gradient(135deg, rgba(110, 231, 183, 0.12), rgba(110, 231, 183, 0.22));
  color: #047857;
}

.portal-card--mall .portal-card__action {
  background: linear-gradient(135deg, rgba(253, 186, 116, 0.12), rgba(253, 186, 116, 0.22));
  color: #c2410c;
}

.portal-card__action:hover,
.portal-card__action:focus-visible {
  color: #0f172a;
}

.footer {
  text-align: center;
  font-size: 14px;
  color: #6b7280;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer .beian {
  color: #64748b;
  text-decoration: none;
}

.footer .beian:hover,
.footer .beian:focus-visible {
  color: #2563eb;
  text-decoration: underline;
}

@media (max-width: 720px) {
  body {
    padding: clamp(24px, 6vw, 56px) clamp(8px, 3vw, 24px);
  }

  .carousel-container {
    gap: 8px;
  }

  .carousel-arrow {
    width: 36px;
    height: 36px;
  }

  .carousel-arrow svg {
    width: 18px;
    height: 18px;
  }

  .portal-board {
    padding: clamp(24px, 5vw, 36px);
  }

  .carousel-slide {
    flex-direction: column;
  }

  .portal-card {
    max-width: 100%;
    align-items: center;
    text-align: center;
  }

  .portal-card__media {
    width: clamp(100px, 40%, 130px);
    align-self: center;
  }

  .portal-card__body {
    align-items: center;
  }

  .portal-card__action {
    align-self: center;
  }
}