:root {
  --orange: #ff7a00;
  --orange-deep: #f04f00;
  --orange-soft: #fff4e8;
  --ink: #1f2937;
  --muted: #64748b;
  --line: #ffe1c2;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(31, 41, 55, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.65;
  background: var(--white);
}

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  display: flex;
  width: 100%;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  color: var(--white);
  transition: background 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
}

.site-header.scrolled,
.site-header.menu-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
}

.brand small {
  font-size: 14px;
  font-weight: 500;
  opacity: 0.78;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
  font-weight: 700;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta,
.button.orange {
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
}

.nav-cta {
  padding: 9px 17px;
}

.button {
  min-height: 48px;
  padding: 0 24px;
}

.button:hover,
.nav-cta:hover {
  transform: translateY(-2px);
}

.primary-light {
  color: var(--orange-deep);
  background: var(--white);
  box-shadow: var(--shadow);
}

.ghost-light {
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.55);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.16);
}

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--white);
  background: linear-gradient(135deg, #ff8c00 0%, #ff5500 62%, #df3f00 100%);
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 100vh;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding-top: 92px;
  padding-bottom: 52px;
}

.hero-bg {
  position: absolute;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.11);
}

.hero-bg-one {
  top: 8%;
  right: 7%;
  width: 310px;
  height: 310px;
}

.hero-bg-two {
  bottom: 10%;
  left: -60px;
  width: 230px;
  height: 230px;
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.hero-brand img {
  width: 62px;
  height: 62px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.hero-brand p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.hero-brand strong {
  font-size: 26px;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
  color: #fff2a8;
}

.tagline {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 800;
}

.hero-text {
  max-width: 520px;
  margin: 0 0 30px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.button-row,
.download-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 34px;
  margin-top: 38px;
}

.stats strong {
  display: block;
  color: #fff2a8;
  font-size: 27px;
}

.stats span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.hero-image {
  display: flex;
  justify-content: center;
}

.hero-image img,
.mascot-small img {
  width: min(390px, 85vw);
  border-radius: 34px;
  object-fit: cover;
  box-shadow: 0 30px 70px rgba(122, 38, 0, 0.28);
}

.section {
  padding: 92px 0;
}

.warm {
  background: linear-gradient(180deg, var(--orange-soft), #ffffff);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.center {
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 6px 13px;
  border-radius: 999px;
  color: var(--orange-deep);
  background: #fff0df;
  font-size: 14px;
  font-weight: 800;
}

.eyebrow.light {
  color: #8a3000;
  background: rgba(255, 255, 255, 0.78);
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

h2 em {
  color: var(--orange-deep);
  font-style: normal;
}

.section p {
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 17px;
}

.pain-list,
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.pain-list li,
.check-list li {
  margin-bottom: 14px;
  border-radius: 16px;
  font-weight: 700;
}

.pain-list li {
  padding: 16px 18px;
  color: #7f1d1d;
  background: #fff1f1;
  border: 1px solid #ffd6d6;
}

.pain-list li::before {
  content: "×";
  display: inline-grid;
  width: 28px;
  height: 28px;
  margin-right: 12px;
  place-items: center;
  border-radius: 999px;
  color: #ef4444;
  background: #ffe2e2;
}

.accent-line {
  color: var(--orange-deep) !important;
  font-size: 22px !important;
  font-weight: 900;
}

.feature-grid,
.cards {
  display: grid;
  gap: 20px;
  margin-top: 34px;
}

.feature-grid {
  grid-template-columns: repeat(3, 1fr);
  max-width: 760px;
  margin-right: auto;
  margin-left: auto;
}

.feature-grid article,
.card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--white);
  box-shadow: 0 10px 30px rgba(255, 122, 0, 0.08);
}

.feature-grid article {
  padding: 24px 18px;
  font-size: 18px;
  font-weight: 900;
}

.two-col {
  grid-template-columns: repeat(2, 1fr);
}

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

.four-col {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  padding: 28px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.card p {
  margin: 0;
  font-size: 15px;
}

.icon {
  display: inline-grid;
  width: 54px;
  height: 54px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 15px;
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
  font-weight: 900;
}

.ecosystem {
  max-width: 560px;
  margin: 34px auto 0;
}

.ecosystem div {
  margin-bottom: 12px;
  padding: 20px 28px;
  border-radius: 18px;
  color: var(--white);
  background: var(--orange);
  font-size: 20px;
  font-weight: 900;
}

.ecosystem div:first-child {
  background: #1f2937;
}

.ecosystem div:nth-child(3) {
  background: #ff6500;
}

.ecosystem div:nth-child(4) {
  background: #ff9442;
}

.ecosystem div:last-child {
  color: var(--orange-deep);
  background: #fff0df;
}

.ecosystem span {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0.82;
}

.orange-band,
.download {
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
}

.orange-band p,
.download p {
  color: rgba(255, 255, 255, 0.78);
}

.light-cards .card {
  color: var(--white);
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.24);
  box-shadow: none;
}

.light-cards .card p {
  color: rgba(255, 255, 255, 0.78);
}

.audience-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
}

.audience-tags span {
  padding: 13px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 10px 26px rgba(255, 122, 0, 0.08);
  font-weight: 800;
}

.check-list li {
  color: var(--ink);
}

.check-list li::before {
  content: "✓";
  margin-right: 10px;
  color: var(--orange-deep);
  font-weight: 900;
}

.download-logo {
  width: 88px;
  height: 88px;
  margin: 0 auto 22px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.download-cards {
  justify-content: center;
  margin-top: 34px;
}

.download-cards article {
  width: 230px;
  padding: 28px 24px;
  border-radius: 22px;
  color: var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
}

.download-cards h3 {
  margin: 18px 0 2px;
}

.download-cards p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.qr-code {
  display: block;
  width: 128px;
  height: auto;
  margin: 0 auto;
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.footer {
  padding: 38px 0;
  color: var(--white);
  background: #111827;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr auto 1fr;
  gap: 24px;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
}

.footer-brand span,
.footer p,
.footer a {
  color: #9ca3af;
}

.footer-brand span {
  display: block;
  font-size: 13px;
}

.footer nav {
  display: flex;
  gap: 18px;
}

.footer p {
  margin: 0;
  text-align: right;
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .site-header {
    padding: 0 20px;
  }

  .menu-button {
    display: block;
    color: inherit;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    color: var(--ink);
    background: #ffffff;
    box-shadow: 0 18px 30px rgba(15, 23, 42, 0.1);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 0;
  }

  .nav-cta {
    margin-top: 6px;
  }

  .hero-grid,
  .split,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 30px;
    text-align: center;
  }

  .hero-brand,
  .button-row,
  .stats {
    justify-content: center;
  }

  .feature-grid,
  .two-col,
  .three-col,
  .four-col {
    grid-template-columns: 1fr;
  }

  .footer p {
    text-align: left;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .section {
    padding: 70px 0;
  }

  .hero h1 {
    font-size: 38px;
  }

  .button {
    width: 100%;
  }

  .stats {
    gap: 20px;
  }
}