:root {
  color-scheme: light;
  --ink: #111418;
  --muted: #5e6670;
  --soft: #f5f7fa;
  --line: #e5e9ef;
  --blue: #1769ff;
  --blue-dark: #0f49bf;
  --green: #0f8a5f;
  --orange: #f07a00;
  --cyan: #0f8fa8;
  --shadow: 0 18px 48px rgba(17, 20, 24, 0.08);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: #fff;
}

a,
button {
  font: inherit;
}

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

button {
  border: 0;
  cursor: pointer;
}

img {
  max-width: 100%;
}

.site-header,
.hero,
.section,
.site-footer {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 10px 24px rgba(23, 105, 255, 0.24);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

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

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--soft);
}

.hero {
  padding: 82px 0 70px;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 34px;
  align-items: end;
}

.split-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 34px;
  align-items: center;
}

.image-hero {
  position: relative;
  min-height: 520px;
  display: grid;
  align-items: end;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.image-hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6, 12, 18, 0.78), rgba(6, 12, 18, 0.18));
}

.image-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: 50px;
  color: #fff;
}

.image-hero-copy .eyebrow,
.image-hero-copy .hero-copy {
  color: #fff;
}

.hero-media {
  margin: 0;
}

.hero-media img,
.section-media img {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 880px;
  margin-bottom: 22px;
  font-size: clamp(42px, 5.8vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.image-hero h1 {
  font-size: clamp(40px, 5vw, 62px);
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.hero-actions,
.product-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

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

.button.ghost,
.button.soft {
  border: 1px solid var(--line);
  background: #fff;
}

.button.soft[aria-disabled="true"],
.button[aria-disabled="true"] {
  color: var(--muted);
  cursor: not-allowed;
}

.hero-metrics,
.stat-grid,
.mini-grid {
  display: grid;
  gap: 12px;
}

.hero-metrics {
  grid-template-columns: 1fr;
}

.hero-metrics > div,
.stat-grid > div,
.mini-grid > div {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-metrics strong,
.stat-grid strong,
.mini-grid strong {
  display: block;
  margin-bottom: 6px;
  font-size: 28px;
}

.hero-metrics span,
.stat-grid span,
.mini-grid span {
  color: var(--muted);
  line-height: 1.55;
}

.section {
  padding: 70px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2,
.section-copy h2,
.contact-strip h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.section-heading p,
.section-copy p,
.product-card p,
.feature-card p,
.role-card p,
.timeline-grid p,
.contact-strip p {
  color: var(--muted);
  line-height: 1.72;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.product-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.product-card.featured {
  border-color: #bcd3ff;
  background: linear-gradient(180deg, #f8fbff, #fff);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  margin-bottom: 24px;
  border-radius: 999px;
  color: var(--blue-dark);
  background: #eaf2ff;
  font-size: 12px;
  font-weight: 800;
}

.status-pill.free {
  color: #fff;
  background: var(--green);
}

.status-pill.pending {
  color: #8a4b00;
  background: #fff1d8;
}

.product-card h3 {
  margin-bottom: 12px;
  font-size: 28px;
  line-height: 1.2;
}

.product-card h3 span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 17px;
}

.product-card .product-actions {
  margin-top: auto;
}

.role-grid,
.feature-grid,
.stat-grid,
.timeline-grid {
  display: grid;
  gap: 14px;
}

.role-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.feature-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.timeline-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card,
.role-card,
.timeline-grid > div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.role-card span,
.timeline-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3,
.role-card h3,
.timeline-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

.media-section {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: 34px;
  align-items: center;
}

.media-section.reverse {
  grid-template-columns: minmax(340px, 0.92fr) minmax(0, 1.08fr);
}

.section-media {
  margin: 0;
}

.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.check-list li {
  color: #2c343d;
  line-height: 1.65;
}

.check-list li::before {
  content: "✓";
  margin-right: 8px;
  color: var(--green);
  font-weight: 900;
}

.visual-band {
  background:
    linear-gradient(180deg, #fff, #f8fbff);
}

.operation-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.operation-board > div {
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid #d7e3ff;
  border-radius: 8px;
  background: #fff;
}

.operation-board strong {
  font-size: 22px;
}

.operation-board span {
  color: var(--muted);
  line-height: 1.7;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.flow-steps > div {
  position: relative;
  min-height: 92px;
  display: grid;
  place-items: center;
  padding: 18px;
  border: 1px solid #cfe0ff;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 900;
  text-align: center;
}

.flow-steps > div:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -12px;
  width: 12px;
  height: 2px;
  background: var(--blue);
}

.mini-grid {
  grid-template-columns: 1fr;
  margin-top: 20px;
}

.storage-saving {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1fr);
  gap: 34px;
  align-items: center;
}

.storage-compare {
  display: grid;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.storage-compare > div {
  display: grid;
  grid-template-columns: 130px 80px 1fr;
  gap: 14px;
  align-items: center;
}

.storage-compare span {
  color: var(--muted);
  font-weight: 800;
}

.storage-compare strong {
  font-size: 26px;
}

.storage-compare i {
  height: 16px;
  width: var(--bar);
  display: block;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.contact-strip {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.contact-strip p {
  max-width: 760px;
  margin-bottom: 0;
}

.contact-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 44px;
  align-items: center;
}

.notice-text {
  display: inline-block;
  padding: 12px 16px;
  border: 1px solid #ffd6a6;
  border-radius: 8px;
  color: #7a4a00;
  background: #fff8ef;
  font-weight: 800;
}

.wechat-box {
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: 14px;
  border: 1px solid #ffd6a6;
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.wechat-box img {
  width: 100%;
  display: block;
  border-radius: 8px;
}

.wechat-box span {
  color: #7a4a00;
  font-size: 14px;
  font-weight: 800;
}

.qr-frame {
  margin: 0;
}

.voice-visual {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #f8fbff, #fff);
  box-shadow: var(--shadow);
}

.voice-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.voice-card span {
  display: block;
  margin-bottom: 14px;
  color: var(--muted);
  font-weight: 800;
}

.voice-card strong {
  font-size: 34px;
}

.voice-card p {
  margin: 0;
  color: var(--muted);
}

.waveform {
  height: 92px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.waveform i {
  width: 12px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--blue), var(--green));
}

.waveform i:nth-child(1) { height: 28px; }
.waveform i:nth-child(2) { height: 64px; }
.waveform i:nth-child(3) { height: 42px; }
.waveform i:nth-child(4) { height: 82px; }
.waveform i:nth-child(5) { height: 52px; }
.waveform i:nth-child(6) { height: 72px; }
.waveform i:nth-child(7) { height: 34px; }

.image-frame {
  position: relative;
  width: 100%;
  min-height: 180px;
}

.missing-image {
  display: none;
  width: 100%;
  min-height: 180px;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border: 1px dashed #cfd8e3;
  border-radius: 8px;
  color: #6b7280;
  background: #f8fafc;
  text-align: center;
  line-height: 1.6;
}

.image-frame.is-missing .missing-image {
  display: flex;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  color: #8a929c;
  font-size: 12px;
}

.site-footer a {
  color: inherit;
}

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

@media (max-width: 1080px) {
  .home-hero,
  .split-hero,
  .media-section,
  .media-section.reverse,
  .storage-saving,
  .contact-hero {
    grid-template-columns: 1fr;
  }

  .hero-metrics,
  .role-grid,
  .product-grid,
  .feature-grid,
  .feature-grid.three,
  .stat-grid,
  .timeline-grid,
  .operation-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    align-items: stretch;
    flex-direction: column;
    padding: 16px 0;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-nav a {
    text-align: center;
    background: var(--soft);
  }

  .hero {
    padding: 54px 0 52px;
  }

  .image-hero {
    width: 100%;
    min-height: 560px;
  }

  .image-hero-copy {
    padding: 28px;
  }

  h1 {
    font-size: clamp(31px, 8.2vw, 38px);
    line-height: 1.14;
  }

  .image-hero h1 {
    font-size: clamp(31px, 8vw, 36px);
  }

  .section-heading h2,
  .section-copy h2,
  .contact-strip h2 {
    font-size: clamp(28px, 7.4vw, 34px);
  }

  .hero-actions,
  .product-actions,
  .button-row {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .section {
    padding: 50px 0;
  }

  .hero-metrics,
  .product-grid,
  .role-grid,
  .feature-grid,
  .feature-grid.three,
  .stat-grid,
  .timeline-grid,
  .operation-board,
  .flow-steps {
    grid-template-columns: 1fr;
  }

  .flow-steps > div:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: -12px;
    left: 50%;
    width: 2px;
    height: 12px;
  }

  .product-card,
  .feature-card,
  .role-card,
  .timeline-grid > div,
  .operation-board > div {
    padding: 20px;
  }

  .contact-strip {
    align-items: stretch;
    flex-direction: column;
  }

  .storage-compare > div {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}