:root {
  color-scheme: light;
  --bg: #f6f8f4;
  --surface: #ffffff;
  --surface-soft: #eef4ef;
  --ink: #17201b;
  --muted: #617067;
  --line: #dbe4dc;
  --green: #0f7a5f;
  --green-dark: #095b48;
  --blue: #2f6fed;
  --coral: #ec5f47;
  --amber: #b7791f;
  --shadow: 0 18px 40px rgba(25, 43, 34, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(18px, 4vw, 64px);
  background: rgba(246, 248, 244, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 700;
}

.brand img {
  width: 34px;
  height: 34px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover {
  background: var(--surface-soft);
  color: var(--ink);
}

.hero-band {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(340px, 1.22fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 7vw, 86px) clamp(18px, 4vw, 64px) 34px;
  border-bottom: 1px solid var(--line);
}

.hero-copy,
.detail-copy {
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.28;
  letter-spacing: 0;
}

.hero-text,
.section-heading p,
.detail-copy p,
.split-section p,
.update-band p {
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 700;
}

.button.primary {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.button.primary:hover {
  background: var(--green-dark);
}

.button.secondary {
  background: var(--surface);
}

.button.secondary:hover {
  border-color: var(--green);
}

.hero-visual {
  margin: 0;
}

.hero-visual img,
.detail-shot img,
.image-explain figure {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-visual figcaption,
.image-explain figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(54px, 7vw, 92px) clamp(18px, 4vw, 64px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.filter-chip {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.filter-chip.is-active,
.filter-chip:hover {
  border-color: var(--green);
  background: var(--surface-soft);
  color: var(--green-dark);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.product-card[hidden] {
  display: none;
}

.product-card.muted {
  background: #fbfcfa;
}

.product-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.product-card-top img,
.placeholder-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
}

.placeholder-icon {
  display: grid;
  place-items: center;
  background: #e9f2ed;
  color: var(--green);
  font-weight: 800;
}

.placeholder-icon.accent {
  background: #f9eadf;
  color: var(--coral);
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.status.ready {
  background: #e4f4ed;
  color: var(--green-dark);
}

.status.planned {
  background: #f9edd9;
  color: var(--amber);
}

.product-card p {
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: auto 0 20px;
}

.tag-row span {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
}

.text-link {
  color: var(--blue);
  font-weight: 700;
}

.text-link.disabled {
  color: var(--muted);
}

.split-section,
.update-band,
.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 1.1fr);
  gap: clamp(24px, 5vw, 58px);
  align-items: center;
}

.split-section {
  background: var(--surface);
}

.scenario-list {
  display: grid;
  gap: 12px;
}

.scenario-list div {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border-left: 4px solid var(--green);
  background: var(--surface-soft);
}

.scenario-list span {
  color: var(--muted);
}

.update-band {
  margin: 0 clamp(18px, 4vw, 64px) clamp(54px, 7vw, 92px);
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff8f3;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 4vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--blue);
}

.site-footer-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 14px;
}

.detail-hero {
  padding: clamp(42px, 7vw, 86px) clamp(18px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
}

.detail-hero h1 {
  font-size: clamp(38px, 5vw, 58px);
}

.back-link {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-weight: 700;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.metric-row div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.metric-row strong,
.metric-row span {
  display: block;
}

.metric-row strong {
  font-size: 24px;
}

.metric-row span {
  color: var(--muted);
  font-size: 13px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-grid p {
  color: var(--muted);
}

.image-explain {
  display: grid;
  grid-template-columns: minmax(240px, 0.7fr) minmax(280px, 1fr) minmax(280px, 1fr);
  gap: 22px;
  align-items: start;
  background: var(--surface);
}

.image-explain figure {
  margin: 0;
  padding: 10px;
}

.image-explain figure img {
  width: 100%;
  border-radius: 6px;
}

.button-guide {
  background: #fbfcfa;
}

.guide-block {
  margin-top: 22px;
}

.guide-block h3 {
  margin-bottom: 12px;
}

.module-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 14px;
}

.module-figure {
  margin: 0 0 14px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 24px rgba(25, 43, 34, 0.08);
}

.module-figure img {
  width: 100%;
  border-radius: 6px;
}

.module-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.module-figure-dialog {
  max-width: 680px;
}

.module-figure-menu {
  max-width: 270px;
}

.guide-table {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.guide-table div {
  display: grid;
  grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.guide-table div:first-child {
  border-top: 0;
}

.guide-table strong,
.guide-table span {
  padding: 14px 16px;
}

.guide-table strong {
  background: var(--surface-soft);
  color: var(--green-dark);
}

.guide-table span {
  color: var(--muted);
}

.step-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.step-list li {
  display: grid;
  grid-template-columns: 56px minmax(160px, 220px) minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  counter-increment: steps;
}

.step-list li::before {
  content: counter(steps, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--green-dark);
  font-weight: 800;
}

.step-list span {
  color: var(--muted);
}

.faq {
  background: var(--surface);
}

.faq details {
  border-top: 1px solid var(--line);
}

.faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  padding: 18px 0;
  font-weight: 700;
}

.faq details p {
  margin-bottom: 18px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .hero-band,
  .detail-hero,
  .split-section,
  .update-band,
  .image-explain {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
  }

  .hero-band {
    min-height: auto;
  }

  h1 {
    font-size: 36px;
  }

  .product-grid,
  .feature-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .module-gallery {
    grid-template-columns: 1fr;
  }

  .step-list li {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .step-list span {
    grid-column: 2;
  }

  .guide-table div {
    grid-template-columns: 1fr;
  }

  .guide-table span {
    padding-top: 0;
  }
}