:root {
  --bg: #f6f9fb;
  --ink: #1f2933;
  --muted: #66788a;
  --brand: #0d7c8c;
  --brand-dark: #075e6c;
  --line: #dbe7ec;
  --soft: #e9f5f7;
  --white: #fff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
}
a { color: inherit; text-decoration: none; }
.wrap {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--brand-dark);
  font-size: 20px;
  font-weight: 700;
  min-width: 0;
}
.logo img {
  height: 42px;
  width: auto;
  display: block;
  flex: 0 0 auto;
}
.logo-text { white-space: nowrap; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}
.nav-links a:hover { color: var(--brand-dark); }
.nav-links .nav-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 18px;
  border-radius: 999px;
  color: #6f3e00;
  font-weight: 700;
  background: linear-gradient(135deg, #fff1a8 0%, #f4c447 48%, #d99a1f 100%);
  box-shadow: 0 10px 24px rgba(217,154,31,.26);
  border: 1px solid rgba(217,154,31,.38);
}
.nav-links .nav-cta::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255,255,255,.25);
}
.nav-links .nav-cta:hover {
  color: #5e3300;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(217,154,31,.34);
}
.hero {
  background:
    linear-gradient(110deg, rgba(7,94,108,.96), rgba(13,124,140,.76)),
    url("./hero-bg.svg") center/cover;
  color: var(--white);
  padding: 86px 0 78px;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .94fr) 520px;
  gap: 52px;
  align-items: center;
}
.eyebrow,
.floor-label {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}
.eyebrow {
  border: 1px solid rgba(255,255,255,.36);
  color: rgba(255,255,255,.92);
  margin-bottom: 18px;
}
.floor-label {
  background: var(--soft);
  color: var(--brand-dark);
  margin-bottom: 14px;
}
h1 {
  margin: 0 0 18px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.1;
  letter-spacing: 0;
}
.hero p {
  margin: 0;
  max-width: 720px;
  color: rgba(255,255,255,.88);
  font-size: 19px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0;
}
.hero-points span,
.cta-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 13px;
  border-radius: 4px;
  background: rgba(255,255,255,.13);
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.9);
  font-size: 14px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 4px;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,.62);
}
.btn.primary {
  background: var(--white);
  color: var(--brand-dark);
  border-color: var(--white);
}
.hero-product-stage {
  position: relative;
  min-height: 450px;
  display: grid;
  grid-template-rows: 1fr auto;
  place-items: center;
  isolation: isolate;
}
.hero-product-stage::before {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.72), rgba(255,255,255,.18) 48%, transparent 68%);
  z-index: -1;
}
.hero-product-stage img {
  display: block;
  width: min(100%, 500px);
  max-height: 390px;
  object-fit: contain;
  object-position: center;
  filter: none;
}
.hero-product-caption {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
  color: rgba(255,255,255,.9);
  white-space: nowrap;
}
.hero-product-caption strong {
  color: #fff;
  font-size: 24px;
}
.hero-product-caption span { color: rgba(255,255,255,.78); }
section { padding: 68px 0; }
.section-title {
  max-width: 800px;
  margin-bottom: 30px;
}
.section-title.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
h2 {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.3;
  letter-spacing: 0;
}
h3 {
  margin: 0 0 10px;
  color: var(--brand-dark);
  font-size: 20px;
  line-height: 1.35;
}
.section-title p,
.scene-card li,
.audience-card p,
.product-content p,
.compare-grid li,
.value-item p,
.faq-list p,
.card p {
  color: var(--muted);
  margin: 0;
}
.product-content > p {
  font-size: 16px;
  line-height: 1.7;
}
.intro-section { background: var(--white); }
.split-row {
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 42px;
  align-items: center;
}
.scene-card,
.audience-card,
.compare-grid article,
.value-item,
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}
.scene-card ul,
.compare-grid ul {
  margin: 12px 0 0;
  padding-left: 20px;
}
.scenario-copy {
  max-width: 650px;
  align-self: center;
}
.scenario-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, 1fr);
  gap: 48px;
  align-items: center;
}
.scenario-copy p {
  color: var(--muted);
  margin: 0;
}
.scenario-slider {
  position: relative;
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 44px rgba(7,94,108,.08);
}
.scenario-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.scenario-slides {
  display: flex;
  width: 400%;
  transition: transform .45s ease;
}
.scenario-slide,
.scenario-slides > figure {
  flex: 0 0 25%;
  margin: 0;
  display: grid;
  grid-template-rows: 330px auto;
  background:
    radial-gradient(circle at 50% 42%, rgba(13,124,140,.08), transparent 58%),
    linear-gradient(145deg, #f5fbfc, #fff);
}
.scenario-slide img,
.scenario-slides > figure img {
  display: block;
  width: 100%;
  height: 330px;
  object-fit: cover;
  object-position: center;
}
.scenario-slide figcaption,
.scenario-slides > figure figcaption {
  min-height: 96px;
  padding: 20px 26px 24px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.scenario-slide figcaption strong,
.scenario-slides > figure figcaption strong {
  display: block;
  margin-bottom: 6px;
  color: var(--brand-dark);
  font-size: 20px;
}
.scenario-slide figcaption span,
.scenario-slides > figure figcaption span {
  color: var(--muted);
}
.scenario-arrows {
  pointer-events: none;
}
.scenario-arrow {
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.92);
  color: var(--brand-dark);
  box-shadow: 0 10px 24px rgba(7,94,108,.16);
  font-size: 34px;
  line-height: 1;
  cursor: pointer;
  pointer-events: auto;
  user-select: none;
}
.scenario-arrow-prev,
.scenario-arrow.prev { left: 18px; }
.scenario-arrow-next,
.scenario-arrow.next { right: 18px; }
.scenario-arrow:hover {
  background: var(--brand-dark);
  color: #fff;
}
.scenario-dots {
  position: absolute;
  right: 24px;
  bottom: 18px;
  display: flex;
  gap: 7px;
}
.scenario-dots label {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(13,124,140,.26);
  cursor: pointer;
}
#scenario-1:checked ~ .scenario-slides { transform: translateX(0); }
#scenario-2:checked ~ .scenario-slides { transform: translateX(-25%); }
#scenario-3:checked ~ .scenario-slides { transform: translateX(-50%); }
#scenario-4:checked ~ .scenario-slides { transform: translateX(-75%); }
.scenario-slider:has(#scenario-1:checked) .scenario-slides { transform: translateX(0); }
.scenario-slider:has(#scenario-2:checked) .scenario-slides { transform: translateX(-25%); }
.scenario-slider:has(#scenario-3:checked) .scenario-slides { transform: translateX(-50%); }
.scenario-slider:has(#scenario-4:checked) .scenario-slides { transform: translateX(-75%); }
#scenario-1:checked ~ .scenario-arrows .prev-1,
#scenario-2:checked ~ .scenario-arrows .prev-2,
#scenario-3:checked ~ .scenario-arrows .prev-3,
#scenario-4:checked ~ .scenario-arrows .prev-4,
#scenario-1:checked ~ .scenario-arrows .next-1,
#scenario-2:checked ~ .scenario-arrows .next-2,
#scenario-3:checked ~ .scenario-arrows .next-3,
#scenario-4:checked ~ .scenario-arrows .next-4 {
  display: flex;
}
.scenario-slider:has(#scenario-1:checked) .scenario-arrows .prev-1,
.scenario-slider:has(#scenario-2:checked) .scenario-arrows .prev-2,
.scenario-slider:has(#scenario-3:checked) .scenario-arrows .prev-3,
.scenario-slider:has(#scenario-4:checked) .scenario-arrows .prev-4,
.scenario-slider:has(#scenario-1:checked) .scenario-arrows .next-1,
.scenario-slider:has(#scenario-2:checked) .scenario-arrows .next-2,
.scenario-slider:has(#scenario-3:checked) .scenario-arrows .next-3,
.scenario-slider:has(#scenario-4:checked) .scenario-arrows .next-4 {
  display: flex;
}
#scenario-1:checked ~ .scenario-dots label:nth-child(1),
#scenario-2:checked ~ .scenario-dots label:nth-child(2),
#scenario-3:checked ~ .scenario-dots label:nth-child(3),
#scenario-4:checked ~ .scenario-dots label:nth-child(4) {
  background: var(--brand);
}
.scenario-slider:has(#scenario-1:checked) .scenario-dots label:nth-child(1),
.scenario-slider:has(#scenario-2:checked) .scenario-dots label:nth-child(2),
.scenario-slider:has(#scenario-3:checked) .scenario-dots label:nth-child(3),
.scenario-slider:has(#scenario-4:checked) .scenario-dots label:nth-child(4) {
  background: var(--brand);
}
@media (prefers-reduced-motion: reduce) {
  .scenario-slides {
    transition: none;
  }
}
.band {
  background: linear-gradient(180deg, #f7fbfc, #fff);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.audience-grid,
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.audience-card span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--brand-dark);
  font-weight: 700;
}
.product-layout {
  display: grid;
  grid-template-columns: minmax(420px, .95fr) minmax(0, 1.05fr);
  gap: 50px;
  align-items: center;
}
.product-media {
  display: grid;
  place-items: center;
  min-height: 600px;
  position: relative;
  isolation: isolate;
}
.product-media::before {
  content: "";
  position: absolute;
  width: min(98%, 640px);
  height: min(98%, 640px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(13,124,140,.12), rgba(13,124,140,.04) 46%, transparent 68%);
  z-index: -1;
}
.product-media img {
  display: block;
  width: min(108%, 720px);
  max-height: 590px;
  object-fit: contain;
  filter: drop-shadow(0 26px 34px rgba(7,94,108,.16));
}
.product-ratio-stage img {
  height: auto;
  object-fit: contain;
}
.product-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 16px;
}
.product-notes article {
  padding: 14px 16px;
  border-radius: 8px;
  background: rgba(233,245,247,.72);
}
.product-notes h3 {
  margin-bottom: 6px;
  font-size: 17px;
}
.product-notes p {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.54;
}
.product-notes p:last-child { margin-bottom: 0; }
.product-notes b { color: var(--brand-dark); }
.product-notes .note-source {
  color: #7d8a96;
  font-size: 14px;
}
.spec-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}
.spec-panel {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  background: rgba(233,245,247,.76);
  border: 1px solid rgba(13,124,140,.14);
  border-radius: 8px;
}
.spec-row {
  flex: 1 1 168px;
  min-width: 0;
  padding: 8px 10px;
  border-radius: 6px;
  background: rgba(255,255,255,.52);
}
.spec-row.full {
  flex: 1 1 250px;
}
.spec-row span {
  display: block;
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 12px;
}
.spec-row b {
  color: var(--brand-dark);
  font-size: 15px;
  line-height: 1.32;
}
.spec-item {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.spec-item.wide { grid-column: span 2; }
.spec-item span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 4px;
}
.spec-item b {
  color: var(--brand-dark);
  font-size: 18px;
}
.compare-section { background: var(--white); }
.compare-highlight {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 16%, rgba(242,188,72,.22), transparent 24%),
    linear-gradient(180deg, #eef8f9, #fff) !important;
  border-color: rgba(13,124,140,.34) !important;
  box-shadow: 0 18px 38px rgba(7,94,108,.11);
  transform: translateY(-6px);
}
.compare-highlight::before {
  content: "\265B";
  position: absolute;
  top: 14px;
  right: 16px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 17px;
  line-height: 1;
  background: linear-gradient(135deg, #f3c45a, #d99a1f);
  box-shadow: 0 8px 20px rgba(217,154,31,.28);
}
.compare-highlight::after {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 7px;
  border: 1px solid rgba(255,255,255,.72);
  pointer-events: none;
}
.value-section {
  background:
    linear-gradient(120deg, rgba(7,94,108,.94), rgba(13,124,140,.86)),
    url("./hero-bg.svg") center/cover;
  color: #fff;
}
.value-section .floor-label {
  background: rgba(255,255,255,.14);
  color: #fff;
}
.value-section .section-title p,
.value-item p {
  color: rgba(255,255,255,.82);
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.value-item {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.18);
}
.value-item h3 {
  color: #fff;
}
.value-item strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}
.cert-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #f8fcfd, #ffffff);
  border-top: 1px solid rgba(219,232,236,.55);
  border-bottom: 1px solid rgba(219,232,236,.55);
}
.cert-marquee {
  position: relative;
  overflow: hidden;
  padding: 2px 0 8px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.cert-track {
  display: flex;
  width: max-content;
  gap: 34px;
  align-items: center;
  animation: certScroll 44s linear infinite;
  will-change: transform;
}
.cert-marquee:hover .cert-track { animation-play-state: paused; }
.cert-card {
  flex: 0 0 230px;
  margin: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
  display: grid;
  grid-template-rows: 160px auto;
  align-items: center;
  justify-items: center;
  text-align: center;
  transition: transform .2s ease, filter .2s ease;
}
.cert-card:hover {
  transform: translateY(-4px);
  filter: drop-shadow(0 14px 18px rgba(7,94,108,.13));
}
.cert-card img {
  display: block;
  max-width: 100%;
  max-height: 150px;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: center;
  align-self: center;
  justify-self: center;
  background: transparent;
}
.cert-card.cert-tall img { max-height: 160px; }
.cert-card figcaption {
  margin-top: 10px;
  color: var(--brand-dark);
  font-weight: 700;
  text-align: center;
  font-size: 14px;
  line-height: 1.3;
  white-space: nowrap;
  max-width: 100%;
}
@keyframes certScroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - 17px)); }
}
@media (prefers-reduced-motion: reduce) {
  .cert-track {
    animation: none;
    flex-wrap: wrap;
    width: auto;
  }
}
.faq-section { background: var(--white); }
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}
.faq-list details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 22px;
  margin-bottom: 14px;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--brand-dark);
}
.cta {
  background:
    linear-gradient(120deg, rgba(7,94,108,.98), rgba(13,124,140,.92)),
    radial-gradient(circle at 78% 30%, rgba(255,255,255,.18), transparent 32%);
  color: var(--white);
  padding: 56px 0;
}
.cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
}
.cta-inner > div:first-child { max-width: 760px; }
.cta h2 { margin-bottom: 8px; }
.cta p { margin: 0; color: rgba(255,255,255,.82); }
.cta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.cta-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.footer {
  padding: 48px 0 34px;
  background: #1d2a32;
  color: rgba(255,255,255,.78);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  align-items: start;
}
.footer-col h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 18px;
  line-height: 1.4;
}
.footer-col h3 a { color: #fff; }
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  color: rgba(255,255,255,.72);
  transition: color .2s ease;
}
.footer-col a:hover { color: #fff; }
.footer-wechat img {
  width: 128px;
  height: auto;
  display: block;
  border-radius: 6px;
  background: #fff;
  padding: 6px;
}
.bottom {
  background: #142026;
  color: rgba(255,255,255,.66);
  padding: 18px 0;
  text-align: center;
  font-size: 14px;
}
.bottom p { margin: 0; }
.bottom a { color: rgba(255,255,255,.82); }
.simple-footer {
  padding: 34px 0 18px;
}
.simple-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.simple-footer-info {
  display: flex;
  align-items: center;
  gap: 18px;
  max-width: 760px;
}
.simple-footer-info img {
  width: 78px;
  height: auto;
  flex: 0 0 auto;
}
.simple-footer-info h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 22px;
}
.simple-footer-info p {
  margin: 0;
  color: rgba(255,255,255,.72);
  line-height: 1.8;
}
.simple-footer-info .footer-record {
  margin-top: 6px;
  color: rgba(255,255,255,.56);
  font-size: 13px;
}
.simple-footer-action {
  display: flex;
  align-items: center;
  gap: 22px;
  flex: 0 0 auto;
}
.footer-qr {
  text-align: center;
  color: rgba(255,255,255,.72);
  font-size: 13px;
}
.footer-qr img {
  display: block;
  width: 92px;
  height: 92px;
  margin-bottom: 8px;
  border-radius: 6px;
  background: #fff;
}
.simple-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.52);
  font-size: 13px;
}
.simple-footer-bottom a {
  color: rgba(255,255,255,.62);
  margin-left: 16px;
}
.simple-footer-bottom a:hover { color: #fff; }
@media (max-width: 980px) {
  .hero-grid,
  .split-row,
  .product-layout,
  .scenario-layout,
  .audience-grid,
  .compare-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }
  .hero-product-stage { max-width: 560px; }
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }
  .nav-links { flex-wrap: wrap; }
  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }
  .cta-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .simple-footer-inner,
  .simple-footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
  .simple-footer-action { justify-content: flex-start; }
}
@media (max-width: 620px) {
  section { padding: 52px 0; }
  .spec-list { grid-template-columns: 1fr; }
  .spec-row,
  .spec-row.full { flex-basis: 100%; }
  .spec-item.wide { grid-column: auto; }
  .product-media { min-height: 300px; }
  .hero-product-stage { min-height: 360px; }
  .footer-grid { grid-template-columns: 1fr; }
  .simple-footer-info {
    align-items: flex-start;
    flex-direction: column;
  }
  .simple-footer-action {
    align-items: flex-start;
    flex-direction: column;
  }
  .logo-text { white-space: normal; }
}