/* =========================================================
   VIISAN S48 Duo 产品页面专属样式
   所有 CSS 均限制在 .viisan-about 内，
   不会影响网站 Header、面包屑、Footer 或其他全站样式。
========================================================= */
.viisan-about {
  --s48-max: 1280px;
  --s48-text-max: 1280px;
  --s48-content-max: 980px;
  --s48-blue: #0071e3;
  --s48-blue-dark: #003e8a;
  --s48-cyan: #33c2ff;
  --s48-ink: #111827;
  --s48-text: #3f4754;
  --s48-muted: #697386;
  --s48-line: #e5eaf2;
  --s48-soft: #f6f8fb;
  --s48-card: #ffffff;
  --s48-radius: 28px;
  --s48-shadow: 0 22px 58px rgba(15, 23, 42, 0.09);
  --s48-soft-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
  position: relative;
  left: auto;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0 0 72px;
  background: #ffffff;
  color: var(--s48-ink);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "PingFang SC",
    "Microsoft YaHei",
    "Noto Sans SC",
    "Segoe UI",
    Arial,
    Helvetica,
    sans-serif;
  line-height: 1.6;
  overflow: hidden;
}
.viisan-about,
.viisan-about * {
  box-sizing: border-box;
}
.viisan-about img {
  display: block;
  max-width: 100%;
  height: auto;
}
.viisan-about a {
  text-decoration: none;
}
.viisan-about h1,
.viisan-about h2,
.viisan-about h3,
.viisan-about p {
  margin-top: 0;
}
.viisan-about .s48-feature-page {
  width: 100%;
  max-width: 100vw;
  background: #ffffff;
  overflow: visible;
}
.viisan-about .s48-feature-page > .s48-feature-intro,
.viisan-about .s48-feature-page > .s48-media-frame,
.viisan-about .s48-feature-page > .s48-section,
.viisan-about .s48-feature-page > .s48-compare-grid,
.viisan-about .s48-feature-page > .s48-ai-section,
.viisan-about .s48-feature-page > .s48-scenarios,
.viisan-about .s48-feature-page > .s48-resource-section,
.viisan-about .s48-feature-page > .s48-faq-section {
  width: min(var(--s48-max), calc(100% - 48px));
  margin-left: auto;
  margin-right: auto;
}
.viisan-about .s48-eyebrow,
.viisan-about .s48-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--s48-blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.viisan-about .s48-feature-intro {
  position: relative;
  max-width: var(--s48-max);
  margin-top: 46px;
  margin-bottom: 22px;
  padding: clamp(42px, 6vw, 76px) clamp(24px, 5vw, 64px);
  text-align: center;
  border-radius: 36px;
  background:
    radial-gradient(
      circle at 16% 18%,
      rgba(0, 150, 255, 0.22),
      transparent 34%
    ),
    radial-gradient(
      circle at 88% 12%,
      rgba(85, 115, 255, 0.2),
      transparent 34%
    ),
    linear-gradient(135deg, #06162d 0%, #073f84 50%, #04152f 100%);
  box-shadow: 0 28px 78px rgba(4, 24, 58, 0.26);
  overflow: hidden;
}
.viisan-about .s48-feature-intro::after {
  content: "";
  position: absolute;
  top: -26%;
  left: 50%;
  width: 70%;
  height: 70%;
  transform: translateX(-50%);
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.18),
    transparent 62%
  );
  pointer-events: none;
}
.viisan-about .s48-eyebrow {
  position: relative;
  z-index: 1;
  padding: 7px 16px;
  border: 1px solid rgba(196, 241, 255, 0.62);
  border-radius: 999px;
  color: #ecfbff;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.viisan-about .s48-feature-intro h1 {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto 16px;
  color: #ffffff;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.08;
  font-weight: 850;
  letter-spacing: -0.045em;
  text-wrap: balance;
}
.viisan-about .s48-gradient-text {
  color: #c7f1ff;
  text-shadow: 0 0 24px rgba(118, 228, 255, 0.3);
}
.viisan-about .s48-feature-intro p {
  position: relative;
  z-index: 1;
  max-width: var(--s48-content-max);
  margin: 0 auto;
  color: #e4f1ff;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.72;
}
.viisan-about .s48-feature-intro p strong {
  color: #ffffff;
}
.viisan-about .s48-hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 1080px;
  margin: 28px auto 0;
}
.viisan-about .s48-stat {
  padding: 17px 14px;
  border: 1px solid rgba(214, 245, 255, 0.22);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.viisan-about .s48-stat strong {
  display: block;
  color: #ffffff;
  font-size: 23px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.viisan-about .s48-stat span {
  display: block;
  margin-top: 6px;
  color: #d4e8f8;
  font-size: 13px;
}
.viisan-about .s48-section,
.viisan-about .s48-resource-section,
.viisan-about .s48-faq-section {
  max-width: var(--s48-max);
  padding: 44px 0 8px;
}
.viisan-about .s48-card,
.viisan-about .s48-resource-header,
.viisan-about .s48-scenarios-header,
.viisan-about .s48-faq-header {
  max-width: var(--s48-content-max);
  margin: 0 auto 16px;
  text-align: center;
}
.viisan-about .s48-card h2,
.viisan-about .s48-resource-header h2,
.viisan-about .s48-scenarios-header h2,
.viisan-about .s48-ai-copy h2,
.viisan-about .s48-faq-header h2 {
  max-width: 960px;
  margin: 0 auto 12px;
  color: var(--s48-ink);
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.035em;
  font-weight: 850;
  text-wrap: balance;
}
.viisan-about .s48-card p,
.viisan-about .s48-resource-header p,
.viisan-about .s48-scenarios-header p,
.viisan-about .s48-ai-copy p,
.viisan-about .s48-faq-header p {
  max-width: var(--s48-content-max);
  margin: 0 auto;
  color: var(--s48-text);
  font-size: 17px;
  line-height: 1.72;
  text-wrap: pretty;
}
.viisan-about .s48-card strong,
.viisan-about .s48-ai-copy strong {
  color: var(--s48-ink);
}
.viisan-about .s48-media-frame {
  max-width: var(--s48-max);
  margin-top: 14px;
  margin-bottom: 8px;
  border-radius: var(--s48-radius);
  overflow: hidden;
  background: #ffffff;
  box-shadow: var(--s48-shadow);
}
.viisan-about .s48-image {
  display: block;
  width: 100%;
  height: auto;
  border: 0;
  border-radius: var(--s48-radius);
}
.viisan-about .s48-compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  max-width: var(--s48-max);
  margin-top: 18px;
}
.viisan-about .s48-compare-item {
  padding: 16px;
  border: 1px solid var(--s48-line);
  border-radius: 28px;
  background: #ffffff;
  box-shadow: var(--s48-soft-shadow);
}
.viisan-about .s48-compare-item img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
}
.viisan-about .s48-compare-content {
  padding: 16px 8px 8px;
  text-align: left;
}
.viisan-about .s48-compare-content h3 {
  margin: 0 0 8px;
  color: var(--s48-ink);
  font-size: 25px;
  line-height: 1.3;
  letter-spacing: -0.025em;
  font-weight: 820;
}
.viisan-about .s48-compare-content p {
  margin: 0;
  color: var(--s48-text);
  font-size: 16px;
  line-height: 1.72;
}
.viisan-about .s48-note {
  max-width: 980px;
  margin: 16px auto 0;
  padding: 14px 18px;
  border: 1px solid #dce5f1;
  border-radius: 16px;
  background: var(--s48-soft);
  color: #5d6675;
  font-size: 15px;
  line-height: 1.7;
  text-align: center;
}
.viisan-about .s48-ai-section {
  max-width: var(--s48-max);
  margin-top: 52px;
  margin-bottom: 8px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid rgba(11, 99, 206, 0.12);
  border-radius: 34px;
  background:
    radial-gradient(
      circle at 8% 10%,
      rgba(0, 113, 227, 0.12),
      transparent 32%
    ),
    radial-gradient(
      circle at 88% 18%,
      rgba(51, 194, 255, 0.18),
      transparent 30%
    ),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
  box-shadow: var(--s48-shadow);
}
.viisan-about .s48-ai-inner {
  display: block;
  max-width: var(--s48-max);
  margin: 0 auto;
}
.viisan-about .s48-ai-copy {
  max-width: var(--s48-content-max);
  margin: 0 auto 26px;
  text-align: center;
}
.viisan-about .s48-ai-copy .s48-kicker {
  justify-content: center;
}
.viisan-about .s48-ai-copy h2 {
  max-width: 860px;
  margin: 0 auto 12px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}
.viisan-about .s48-ai-copy p {
  max-width: 900px;
  margin: 0 auto;
  font-size: clamp(17px, 1.65vw, 20px);
  line-height: 1.72;
}
.viisan-about .s48-ai-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: var(--s48-max);
  margin: 28px auto 0;
}
.viisan-about .s48-ai-point {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 13px;
  align-items: start;
  padding: 18px;
  border: 1px solid rgba(11, 99, 206, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.78);
  text-align: left;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.04);
}
.viisan-about .s48-ai-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 13px;
  background: #e8f3ff;
  color: var(--s48-blue);
  font-size: 15px;
  font-weight: 900;
}
.viisan-about .s48-ai-point strong {
  display: block;
  color: var(--s48-ink);
  font-size: 16px;
  line-height: 1.4;
}
.viisan-about .s48-ai-point span {
  display: block;
  margin-top: 4px;
  color: var(--s48-text);
  font-size: 14px;
  line-height: 1.65;
}
.viisan-about .s48-ai-visual {
  position: relative;
  max-width: var(--s48-max);
  margin: 28px auto 0;
  border-radius: 28px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 22px 58px rgba(15, 23, 42, 0.12);
}
.viisan-about .s48-ai-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 28px;
}
.viisan-about .s48-ai-bubble {
  position: absolute;
  top: 28px;
  left: 28px;
  max-width: 360px;
  padding: 15px 18px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12);
  text-align: left;
}
.viisan-about .s48-ai-bubble strong {
  display: block;
  margin-bottom: 4px;
  color: var(--s48-blue-dark);
  font-size: 15px;
}
.viisan-about .s48-ai-bubble span {
  display: block;
  color: var(--s48-text);
  font-size: 14px;
  line-height: 1.6;
}
.viisan-about .s48-scenarios {
  max-width: var(--s48-max);
  padding: 48px 0 8px;
}
.viisan-about .s48-scenarios-header {
  margin-bottom: 18px;
}
.viisan-about .s48-carousel {
  position: relative;
  max-width: var(--s48-max);
  margin: 0 auto;
}
.viisan-about .s48-carousel-viewport {
  overflow: hidden;
  border-radius: var(--s48-radius);
  background: var(--s48-soft);
  box-shadow: var(--s48-shadow);
}
.viisan-about .s48-carousel-track {
  display: flex;
  transition: transform 0.55s ease;
  will-change: transform;
}
.viisan-about .s48-carousel-slide {
  position: relative;
  flex: 0 0 100%;
  min-width: 100%;
  background: var(--s48-soft);
}
.viisan-about .s48-carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--s48-radius);
}
.viisan-about .s48-carousel-caption {
  position: absolute;
  bottom: 28px;
  left: 28px;
  max-width: 540px;
  padding: 22px 24px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(22px) saturate(1.35);
  -webkit-backdrop-filter: blur(22px) saturate(1.35);
  text-align: left;
}
.viisan-about .s48-carousel-caption h3 {
  margin: 0 0 8px;
  color: rgba(17, 24, 39, 0.96);
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.025em;
  font-weight: 850;
}
.viisan-about .s48-carousel-caption p {
  margin: 0;
  color: rgba(63, 71, 84, 0.94);
  font-size: 16px;
  line-height: 1.7;
}
.viisan-about .s48-carousel-btn {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--s48-ink);
  font-size: 24px;
  cursor: pointer;
  transform: translateY(-50%);
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.16);
}
.viisan-about .s48-carousel-btn:hover {
  color: var(--s48-blue);
}
.viisan-about .s48-carousel-prev {
  left: 16px;
}
.viisan-about .s48-carousel-next {
  right: 16px;
}
.viisan-about .s48-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}
.viisan-about .s48-carousel-dot {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: #c7d0dd;
  cursor: pointer;
  transition:
    width 0.2s ease,
    background 0.2s ease;
}
.viisan-about .s48-carousel-dot.is-active {
  width: 26px;
  background: var(--s48-blue);
}
.viisan-about .s48-resource-grid,
.viisan-about .s48-faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: var(--s48-content-max);
  margin: 20px auto 0;
}
.viisan-about .s48-resource-card,
.viisan-about .s48-faq-item {
  display: block;
  padding: 24px 22px;
  border: 1px solid rgba(11, 99, 206, 0.14);
  border-radius: 20px;
  color: inherit;
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  box-shadow: var(--s48-soft-shadow);
  transition: all 0.22s ease;
}
.viisan-about .s48-resource-card:hover {
  transform: translateY(-3px);
  border-color: rgba(11, 99, 206, 0.3);
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.08);
}
.viisan-about .s48-resource-card strong,
.viisan-about .s48-faq-item h3 {
  display: block;
  margin: 0 0 8px;
  color: var(--s48-ink);
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -0.015em;
}
.viisan-about .s48-resource-card span,
.viisan-about .s48-faq-item p {
  display: block;
  margin: 0;
  color: var(--s48-text);
  font-size: 15px;
  line-height: 1.7;
}
.viisan-about .s48-resource-note {
  max-width: var(--s48-content-max);
  margin: 18px auto 0;
  padding: 18px 22px;
  border: 1px solid #dce5f1;
  border-radius: 18px;
  background: #f8fbff;
  color: var(--s48-text);
  font-size: 15px;
  line-height: 1.7;
  text-align: center;
}
.viisan-about .s48-resource-note strong {
  color: var(--s48-blue-dark);
}
@media (max-width: 1024px) {
  .viisan-about {
    padding: 0 0 60px;
  }
  .viisan-about .s48-feature-page > .s48-feature-intro,
  .viisan-about .s48-feature-page > .s48-media-frame,
  .viisan-about .s48-feature-page > .s48-section,
  .viisan-about .s48-feature-page > .s48-compare-grid,
  .viisan-about .s48-feature-page > .s48-ai-section,
  .viisan-about .s48-feature-page > .s48-scenarios,
  .viisan-about .s48-feature-page > .s48-resource-section,
  .viisan-about .s48-feature-page > .s48-faq-section {
    width: min(var(--s48-max), calc(100% - 36px));
  }
  .viisan-about .s48-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .viisan-about .s48-ai-points,
  .viisan-about .s48-resource-grid,
  .viisan-about .s48-faq-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .viisan-about {
    padding: 0 0 52px;
    line-height: 1.55;
  }
  .viisan-about .s48-feature-page > .s48-feature-intro,
  .viisan-about .s48-feature-page > .s48-media-frame,
  .viisan-about .s48-feature-page > .s48-section,
  .viisan-about .s48-feature-page > .s48-compare-grid,
  .viisan-about .s48-feature-page > .s48-ai-section,
  .viisan-about .s48-feature-page > .s48-scenarios,
  .viisan-about .s48-feature-page > .s48-resource-section,
  .viisan-about .s48-feature-page > .s48-faq-section {
    width: calc(100% - 28px);
  }
  .viisan-about .s48-feature-intro {
    margin-top: 28px;
    padding: 36px 18px 34px;
    border-radius: 24px;
  }
  .viisan-about .s48-eyebrow {
    font-size: 11px;
  }
  .viisan-about .s48-feature-intro h1 {
    font-size: clamp(32px, 9vw, 42px);
    line-height: 1.16;
  }
  .viisan-about .s48-feature-intro p,
  .viisan-about .s48-card p,
  .viisan-about .s48-scenarios-header p,
  .viisan-about .s48-resource-header p,
  .viisan-about .s48-ai-copy p,
  .viisan-about .s48-faq-header p {
    font-size: 16px;
    line-height: 1.65;
  }
  .viisan-about .s48-hero-stats,
  .viisan-about .s48-compare-grid,
  .viisan-about .s48-resource-grid,
  .viisan-about .s48-faq-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .viisan-about .s48-section,
  .viisan-about .s48-resource-section,
  .viisan-about .s48-faq-section {
    padding: 34px 0 6px;
  }
  .viisan-about .s48-card h2,
  .viisan-about .s48-resource-header h2,
  .viisan-about .s48-scenarios-header h2,
  .viisan-about .s48-ai-copy h2,
  .viisan-about .s48-faq-header h2 {
    max-width: 100%;
    font-size: clamp(27px, 7vw, 34px);
    line-height: 1.25;
  }
  .viisan-about .s48-media-frame,
  .viisan-about .s48-carousel-viewport,
  .viisan-about .s48-carousel-slide img,
  .viisan-about .s48-image,
  .viisan-about .s48-ai-section,
  .viisan-about .s48-ai-visual,
  .viisan-about .s48-ai-visual img {
    border-radius: 18px;
  }
  .viisan-about .s48-ai-section {
    margin-top: 36px;
    padding: 18px;
    border-radius: 22px;
  }
  .viisan-about .s48-ai-points {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 22px;
  }
  .viisan-about .s48-ai-bubble {
    position: static;
    max-width: none;
    margin: 0;
    border-radius: 0 0 18px 18px;
    background: rgba(247, 251, 255, 0.86);
    box-shadow: none;
  }
  .viisan-about .s48-carousel-caption {
    position: static;
    max-width: none;
    padding: 18px 16px 20px;
    border-radius: 0 0 18px 18px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: none;
  }
  .viisan-about .s48-carousel-btn {
    top: 36%;
    width: 38px;
    height: 38px;
    font-size: 20px;
  }
  .viisan-about .s48-carousel-prev {
    left: 10px;
  }
  .viisan-about .s48-carousel-next {
    right: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .viisan-about .s48-carousel-track,
  .viisan-about .s48-carousel-dot,
  .viisan-about .s48-resource-card {
    transition: none;
  }
}




/* ===== 商城详情容器适配（my.305411.com / bookscanner.top 商品详情页） ===== */
.product-description {
  overflow: visible;
}
.product-description .viisan-about {
  margin: -20px; /* 抵消详情白卡 padding，让区块真正全宽 */
  width: calc(100% + 40px);
  max-width: calc(100% + 40px);
}
.product-description .viisan-about img {
  max-width: 100%;
}