:root {
  --bg-top: #eef7ff;
  --bg-bottom: #fff6ea;
  --panel: rgba(255, 255, 255, 0.76);
  --panel-strong: #ffffff;
  --text: #1f3760;
  --muted: #6a7f9e;
  --line: rgba(91, 133, 211, 0.14);
  --blue: #5b90ff;
  --blue-deep: #3069ea;
  --pink: #ff8ec4;
  --yellow: #f5c55b;
  --mint: #79d9c8;
  --shadow-xl: 0 34px 80px rgba(78, 116, 183, 0.14);
  --shadow-md: 0 16px 36px rgba(90, 125, 192, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--text);
  font-family: 'Manrope', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background:
    radial-gradient(circle at 0% 0%, rgba(137, 200, 255, 0.35), transparent 24%),
    radial-gradient(circle at 88% 14%, rgba(255, 213, 146, 0.3), transparent 20%),
    linear-gradient(180deg, var(--bg-top) 0%, #f8fbff 52%, var(--bg-bottom) 100%);
  overflow-x: hidden;
}

.page-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.hero,
.section,
.site-footer .footer-inner {
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(255, 250, 244, 0.82));
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(24px);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: 34px;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(28px);
  opacity: 0.48;
}

.hero-orb-left {
  top: -96px;
  left: -92px;
  width: 320px;
  height: 320px;
  background: rgba(123, 183, 255, 0.5);
}

.hero-orb-right {
  right: -80px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  background: rgba(255, 201, 115, 0.42);
}

.hero-topbar,
.hero-grid {
  position: relative;
  z-index: 1;
}

.hero-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 62px;
  height: 62px;
  border-radius: 20px;
  background: linear-gradient(145deg, #4c84ff, #79b2ff);
  color: #fff;
  font: 700 30px/1 'Noto Serif SC', serif;
  box-shadow: 0 14px 28px rgba(76, 132, 255, 0.26);
}

.brand-copy h1 {
  margin: 6px 0 0;
  font: 700 28px/1.2 'Noto Serif SC', serif;
}

.brand-kicker,
.eyebrow,
.section-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(121, 217, 200, 0.2);
  color: #177f71;
  font-size: 13px;
  font-weight: 800;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(310px, 0.9fr);
  gap: 28px;
  margin-top: 28px;
}

.hero-copy h2 {
  margin: 14px 0 0;
  max-width: 12ch;
  font: 700 clamp(38px, 4.3vw, 60px)/1.08 'Noto Serif SC', serif;
}

.hero-desc {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.metric-card,
.feature-card,
.usage-card,
.question-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-md);
}

.metric-card {
  padding: 18px;
  border-radius: 24px;
}

.metric-card strong,
.feature-card h4,
.usage-card h4,
.question-card h4 {
  display: block;
  font-size: 18px;
  line-height: 1.4;
}

.metric-card span,
.feature-card p,
.usage-card p,
.question-answer p,
.section-desc,
.footer-note {
  color: var(--muted);
  line-height: 1.8;
}

.metric-card span {
  display: block;
  margin-top: 10px;
  font-size: 14px;
}

.hero-phone {
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-frame {
  width: min(100%, 360px);
  padding: 14px;
  border-radius: 34px;
  background: linear-gradient(180deg, #17315f, #2d4c8d);
  box-shadow: 0 30px 58px rgba(35, 62, 120, 0.28);
}

.phone-notch {
  width: 132px;
  height: 22px;
  margin: 0 auto 12px;
  border-radius: 0 0 18px 18px;
  background: #10264e;
}

.phone-screen {
  padding: 18px;
  border-radius: 24px;
  background:
    radial-gradient(circle at top right, rgba(255, 228, 176, 0.5), transparent 24%),
    linear-gradient(180deg, #eaf6ff 0%, #f7fbff 62%, #fff8ee 100%);
}

.screen-banner {
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(135deg, #5d96ff, #89bdff);
  color: #fff;
}

.screen-title {
  font-size: 20px;
  font-weight: 800;
}

.screen-subtitle {
  margin-top: 8px;
  font-size: 13px;
  opacity: 0.9;
}

.screen-card {
  margin-top: 14px;
  padding: 16px;
  border-radius: 20px;
}

.soft-blue {
  background: rgba(255, 255, 255, 0.86);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.screen-label {
  display: inline-flex;
  min-height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(91, 144, 255, 0.14);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 700;
  align-items: center;
}

.screen-card strong,
.progress-copy strong {
  display: block;
  margin-top: 10px;
  font-size: 18px;
}

.screen-card p,
.progress-copy span,
.screen-item p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.screen-progress {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 14px;
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.88);
}

.ring {
  display: grid;
  place-items: center;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: conic-gradient(var(--blue) 0% 82%, rgba(91, 144, 255, 0.12) 82% 100%);
}

.ring-inner {
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #fff;
  color: var(--blue-deep);
  font-weight: 800;
}

.screen-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.screen-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
}

.screen-item strong {
  display: block;
  font-size: 15px;
}

.dot {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 50%;
}

.dot-pink {
  background: var(--pink);
}

.dot-yellow {
  background: var(--yellow);
}

.dot-blue {
  background: var(--blue);
}

.section {
  margin-top: 22px;
  padding: 26px;
  border-radius: 30px;
}

.section-heading h3 {
  margin: 10px 0 0;
  font: 700 32px/1.2 'Noto Serif SC', serif;
}

.section-desc {
  margin: 12px 0 0;
  max-width: 780px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.feature-card {
  padding: 20px;
  border-radius: 24px;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(91, 144, 255, 0.18), rgba(255, 199, 95, 0.24));
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 800;
}

.feature-card h4 {
  margin: 16px 0 8px;
}

.feature-card p,
.usage-card p {
  margin: 0;
}

.usage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.usage-card {
  padding: 20px;
  border-radius: 24px;
}

.usage-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(145deg, #5d96ff, #7eb5ff);
  color: #fff;
  font-weight: 800;
}

.usage-card h4 {
  margin: 16px 0 8px;
}

.showcase {
  background:
    radial-gradient(circle at top right, rgba(255, 209, 133, 0.18), transparent 18%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 249, 243, 0.84));
}

.question-stack {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.question-card {
  padding: 22px;
  border-radius: 26px;
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.question-tag,
.question-type {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.question-tag {
  background: rgba(91, 144, 255, 0.14);
  color: var(--blue-deep);
}

.question-type {
  background: rgba(255, 142, 196, 0.14);
  color: #d54890;
}

.question-card h4 {
  margin: 16px 0 14px;
}

.question-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.question-answer {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.question-answer strong {
  display: block;
  color: var(--blue-deep);
  font-size: 15px;
}

.question-answer p {
  margin: 8px 0 0;
}

.site-footer {
  padding: 0 20px 30px;
}

.site-footer .footer-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 22px 24px 24px;
  border-radius: 24px;
  text-align: center;
}

.footer-brand {
  margin: 0;
  font: 700 18px/1.4 'Noto Serif SC', serif;
}

.footer-note {
  margin: 10px 0 0;
}

.footer-icp {
  margin: 12px 0 0;
}

.footer-icp a {
  color: var(--blue-deep);
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 980px) {
  .hero-grid,
  .feature-grid,
  .usage-strip {
    grid-template-columns: 1fr;
  }

  .hero-copy h2 {
    max-width: none;
  }

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

@media (max-width: 680px) {
  .site-shell {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .hero,
  .section {
    padding: 20px;
    border-radius: 24px;
  }

  .hero-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand {
    align-items: flex-start;
  }

  .brand-copy h1 {
    font-size: 24px;
  }

  .hero-copy h2 {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .phone-frame {
    width: 100%;
  }
}