:root {
  --bg: #fff6ef;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #3b1a15;
  --muted: #7f5146;
  --line: rgba(173, 46, 34, 0.14);
  --primary: #c62828;
  --primary-dark: #8e1616;
  --secondary: #f4b400;
  --success: #d94c1a;
  --warning: #f6c443;
  --danger: #b71c1c;
  --shadow: 0 24px 70px rgba(143, 36, 24, 0.16);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(198, 40, 40, 0.22), transparent 28%),
    radial-gradient(circle at top right, rgba(244, 180, 0, 0.2), transparent 24%),
    linear-gradient(180deg, #fff3ea 0%, #fffaf2 100%);
}

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

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

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero,
.section,
.footer-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 36px;
  padding: 42px;
  border-radius: 32px;
}

.hero-copy h1,
.section-title h2,
.footer-card h2 {
  margin: 0;
  line-height: 1.15;
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--primary-dark);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-text,
.feature-card p,
.score-item p,
.highlight-copy p,
.highlight-copy li,
.footer-card p,
.logo-card p,
.phone-app p {
  color: var(--muted);
  line-height: 1.75;
}

.hero-text {
  margin: 18px 0 0;
  max-width: 620px;
  font-size: 1.03rem;
}

.hero-tags,
.mini-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tags {
  margin-top: 22px;
}

.hero-tags span,
.mini-grid span,
.panel-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-size: 0.9rem;
}

.hero-tags span {
  padding: 10px 14px;
  background: rgba(198, 40, 40, 0.1);
  color: var(--primary-dark);
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 210px;
  padding: 14px 18px;
  border-radius: 18px;
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.download-btn strong,
.download-btn small {
  display: block;
}

.download-btn small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 500;
}

.download-btn.android {
  background: linear-gradient(135deg, var(--primary), #e24a2a);
  color: #fff;
}

.download-btn.ios {
  background: linear-gradient(135deg, var(--secondary), #f08e1f);
  color: #4c2500;
}

.download-btn.disabled {
  cursor: default;
  pointer-events: none;
  box-shadow: 0 16px 34px rgba(26, 38, 78, 0.18);
}

.download-btn.disabled:hover {
  transform: translateY(-2px);
}

.btn-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.2);
}

.btn-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.hero-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.logo-card,
.phone-card,
.feature-card,
.score-item,
.highlight-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.logo-card {
  padding: 24px;
  display: flex;
  min-height: 320px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.logo-ring {
  position: absolute;
  inset: auto auto 18px -28px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 180, 0, 0.24), transparent 70%);
}

.logo-card img {
  width: min(180px, 60%);
  border-radius: 30px;
  box-shadow: 0 20px 40px rgba(198, 40, 40, 0.2);
}

.logo-card p {
  margin: 0;
  text-align: center;
}

.phone-card {
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(198, 40, 40, 0.08), rgba(198, 40, 40, 0)),
    #ffffff;
}

.phone-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 2px 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.signal,
.battery {
  width: 26px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(244, 180, 0, 0.28), rgba(198, 40, 40, 0.52));
}

.phone-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 18px;
  border-radius: 24px;
  background: #fff9f3;
  border: 1px solid rgba(198, 40, 40, 0.08);
}

.phone-app {
  display: flex;
  align-items: center;
  gap: 14px;
}

.phone-app img {
  width: 56px;
  border-radius: 15px;
}

.phone-app p {
  margin: 4px 0 0;
  font-size: 0.92rem;
}

.score-panel {
  padding: 18px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(198, 40, 40, 0.14), rgba(244, 180, 0, 0.16));
}

.score-panel span,
.score-panel small {
  display: block;
}

.score-panel span {
  color: var(--muted);
  font-size: 0.92rem;
}

.score-panel strong {
  display: block;
  margin: 8px 0 6px;
  font-size: 2.6rem;
  color: var(--primary-dark);
  letter-spacing: -0.05em;
}

.score-panel small {
  color: var(--muted);
}

.mini-grid span {
  padding: 9px 12px;
  background: #fffdf8;
  border: 1px solid var(--line);
  color: var(--text);
}

.section {
  margin-top: 24px;
  padding: 34px;
  border-radius: 30px;
}

.section-title {
  margin-bottom: 24px;
}

.section-title h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  letter-spacing: -0.03em;
}

.feature-grid,
.score-grid {
  display: grid;
  gap: 18px;
}

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

.feature-card,
.score-item {
  padding: 22px;
}

.feature-card h3,
.score-item strong {
  display: block;
}

.feature-card h3 {
  margin: 18px 0 10px;
  font-size: 1.18rem;
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
}

.feature-icon svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-icon.blue {
  background: rgba(198, 40, 40, 0.1);
  color: var(--primary);
}

.feature-icon.purple {
  background: rgba(244, 180, 0, 0.18);
  color: var(--secondary);
}

.feature-icon.green {
  background: rgba(217, 76, 26, 0.12);
  color: var(--success);
}

.feature-icon.orange {
  background: rgba(246, 196, 67, 0.18);
  color: var(--warning);
}

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

.score-item {
  background:
    linear-gradient(180deg, rgba(198, 40, 40, 0.06), rgba(244, 180, 0, 0.03)),
    #fff;
}

.score-item strong {
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.score-item.negative {
  background:
    linear-gradient(180deg, rgba(183, 28, 28, 0.1), rgba(246, 196, 67, 0.03)),
    #fff;
}

.highlight-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  align-items: stretch;
}

.highlight-copy {
  padding-right: 10px;
}

.highlight-copy p {
  margin: 0 0 14px;
  font-size: 1rem;
}

.bullet-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.75;
}

.highlight-panel {
  padding: 24px;
  background:
    radial-gradient(circle at top right, rgba(244, 180, 0, 0.18), transparent 36%),
    #fff;
}

.panel-badge {
  width: fit-content;
  padding: 9px 14px;
  margin-bottom: 16px;
  background: rgba(198, 40, 40, 0.12);
  color: var(--primary-dark);
  font-weight: 700;
}

.panel-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.panel-line:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.panel-line span {
  color: var(--muted);
}

.panel-line strong {
  text-align: right;
}

.footer-card {
  margin-top: 24px;
  padding: 30px 34px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-card h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 2.4vw, 2.2rem);
}

.footer-card p {
  margin: 0;
  max-width: 620px;
}

.footer-downloads {
  margin-top: 0;
}

@media (max-width: 1080px) {
  .hero,
  .highlight-layout,
  .footer-card {
    grid-template-columns: 1fr;
    display: grid;
  }

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

@media (max-width: 820px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 18px;
  }

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

  .hero-visual,
  .score-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .download-btn {
    width: 100%;
    justify-content: center;
  }

  .panel-line {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-line strong {
    text-align: left;
  }
}