* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #f7f9ff;
  background: #060b1d;
  overflow-x: hidden;
}

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

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 15% 12%, rgba(135, 72, 255, 0.36), transparent 20%),
    radial-gradient(circle at 82% 18%, rgba(0, 140, 255, 0.35), transparent 22%),
    radial-gradient(circle at 50% 0%, rgba(125, 91, 255, 0.16), transparent 36%),
    linear-gradient(135deg, #050817 0%, #071533 45%, #041028 100%);
}

.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 18%, rgba(91, 151, 255, 0.08), transparent 42%),
    linear-gradient(150deg, transparent 52%, rgba(180, 66, 255, 0.09), transparent 75%);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 78px;
  padding: 0 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(5, 10, 28, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.brand-star {
  font-size: 28px;
  color: #9db7ff;
  text-shadow: 0 0 18px rgba(128, 153, 255, 0.9);
}

.login-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  height: 42px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  background: linear-gradient(135deg, #3f8cff, #913fff);
  box-shadow: 0 0 28px rgba(93, 94, 255, 0.55);
}

.user-box {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 10px 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.9);
}

.user-box button {
  border: 0;
  cursor: pointer;
  color: #fff;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

main {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  position: relative;
  text-align: center;
  padding: 110px 0 80px;
}

.hero-orb {
  position: absolute;
  z-index: -1;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  filter: blur(4px);
  opacity: 0.75;
}

.hero-orb-left {
  left: 0;
  top: 100px;
  background: radial-gradient(circle, rgba(154, 71, 255, 0.8), rgba(154, 71, 255, 0));
}

.hero-orb-right {
  right: 5%;
  top: 80px;
  background: radial-gradient(circle, rgba(0, 153, 255, 0.78), rgba(0, 153, 255, 0));
}

.hero h1 {
  margin: 0;
  font-size: clamp(48px, 7vw, 82px);
  line-height: 1.08;
  letter-spacing: -2px;
  font-weight: 900;
}

.hero h1 span {
  background: linear-gradient(135deg, #ffffff, #8eb8ff, #d875ff);
  -webkit-background-clip: text;
  color: transparent;
  text-shadow: 0 0 42px rgba(140, 98, 255, 0.45);
}

.hero-subtitle {
  margin: 22px 0 0;
  font-size: 26px;
  color: rgba(255, 255, 255, 0.88);
}

.hero-desc {
  max-width: 720px;
  margin: 18px auto 0;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.8;
  font-size: 16px;
}

.hero-actions {
  margin-top: 38px;
  display: flex;
  justify-content: center;
  gap: 22px;
}

.btn {
  min-width: 190px;
  height: 58px;
  padding: 0 28px;
  border-radius: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 850;
  font-size: 17px;
}

.btn-primary {
  background: linear-gradient(135deg, #2f9bff, #8f45ff);
  box-shadow: 0 0 34px rgba(95, 95, 255, 0.52);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(184, 198, 255, 0.28);
}

.core-tools {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 26px;
}

.tool-card {
  position: relative;
  min-height: 430px;
  padding: 44px 34px 34px;
  border-radius: 28px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.34);
  backdrop-filter: blur(18px);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.tool-card:hover {
  transform: translateY(-8px);
  border-color: rgba(143, 175, 255, 0.55);
  background: rgba(255, 255, 255, 0.08);
}

.tool-icon {
  width: 90px;
  height: 90px;
  display: grid;
  place-items: center;
  margin: 0 auto 34px;
  border-radius: 26px;
  font-size: 50px;
  background: rgba(255, 255, 255, 0.09);
}

.tool-card h2 {
  margin: 0;
  text-align: center;
  font-size: 34px;
}

.tool-card p {
  margin: 14px 0 26px;
  text-align: center;
  color: rgba(255, 255, 255, 0.62);
}

.tag-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.tag-grid span {
  padding: 10px 12px;
  border-radius: 12px;
  text-align: center;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.075);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.tool-price {
  position: absolute;
  left: 34px;
  right: 34px;
  bottom: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #dce6ff;
  font-weight: 750;
}

.chat-card {
  box-shadow: inset 0 -3px 0 rgba(0, 151, 255, 0.5), 0 34px 90px rgba(0, 0, 0, 0.34);
}

.image-card {
  border-color: rgba(221, 71, 255, 0.62);
  background:
    radial-gradient(circle at 50% 12%, rgba(211, 71, 255, 0.24), transparent 34%),
    rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 42px rgba(202, 60, 255, 0.34), 0 34px 90px rgba(0, 0, 0, 0.38);
}

.recommend {
  position: absolute;
  right: 24px;
  top: 22px;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 800;
  background: linear-gradient(135deg, #d850ff, #ff67c8);
}

.video-card {
  cursor: default;
  opacity: 0.58;
}

.video-card:hover {
  transform: none;
}

.video-lock {
  text-align: center;
  font-size: 40px;
  margin-top: 42px;
  opacity: 0.75;
}

.coming-soon {
  margin-top: 14px;
  text-align: center;
  font-size: 22px;
  font-weight: 850;
  color: rgba(255, 255, 255, 0.8);
}

.section-title {
  margin: 0 0 34px;
  text-align: center;
  font-size: 30px;
  letter-spacing: 1px;
}

.section-title::before,
.section-title::after {
  content: "✦";
  margin: 0 16px;
  color: #7fa7ff;
}

.why-section {
  padding: 120px 0 0;
}

.why-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 32px 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.why-item {
  padding: 18px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.why-item:last-child {
  border-right: 0;
}

.why-icon {
  font-size: 42px;
  margin-bottom: 14px;
}

.why-item h3 {
  margin: 0 0 10px;
  font-size: 19px;
}

.why-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.7;
}

.steps-section {
  padding: 120px 0 0;
}

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 9%;
  right: 9%;
  top: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(150, 171, 255, 0.55), transparent);
}

.step {
  position: relative;
  text-align: center;
}

.step-circle {
  position: relative;
  z-index: 1;
  width: 92px;
  height: 92px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 28px;
  font-weight: 900;
  background: rgba(74, 92, 190, 0.28);
  border: 1px solid rgba(163, 181, 255, 0.42);
  box-shadow: 0 0 24px rgba(103, 126, 255, 0.18);
}

.step h3 {
  margin: 0 0 10px;
}

.step p {
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

.safety-section {
  padding: 130px 0 0;
}

.safety-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 34px 24px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.safety-item {
  padding: 20px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.safety-item:last-child {
  border-right: 0;
}

.safety-icon {
  font-size: 38px;
  margin-bottom: 14px;
}

.safety-item h3 {
  margin: 0 0 10px;
}

.safety-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  line-height: 1.7;
}

.safety-note {
  margin: 22px 0 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.62);
}

.faq-section {
  padding: 120px 0 100px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.faq-card {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.052);
  border: 1px solid rgba(255, 255, 255, 0.11);
}

.faq-card summary {
  cursor: pointer;
  font-weight: 850;
  font-size: 18px;
}

.faq-card p {
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.7;
}

.footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 30px 0 42px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-brand {
  font-size: 24px;
  color: #fff;
  font-weight: 850;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.62);
}

@media (max-width: 900px) {
  .navbar {
    height: 66px;
    padding: 0 18px;
  }

  .brand {
    font-size: 20px;
  }

  main {
    width: min(100% - 28px, 680px);
  }

  .hero {
    padding: 64px 0 44px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 14px;
  }

  .btn {
    width: 100%;
  }

  .core-tools {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .tool-card {
    min-height: auto;
    padding: 28px 22px;
  }

  .tool-icon {
    margin-bottom: 18px;
  }

  .tool-price {
    position: static;
    margin-top: 22px;
  }

  .why-section,
  .steps-section,
  .safety-section,
  .faq-section {
    padding-top: 78px;
  }

  .why-strip,
  .safety-panel,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .why-item,
  .safety-item {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .why-item:last-child,
  .safety-item:last-child {
    border-bottom: 0;
  }

  .timeline {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .timeline::before {
    display: none;
  }

  .footer {
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .user-box {
    font-size: 13px;
    padding-left: 12px;
  }
}