:root {
  --green: #16c76a;
  --green-dark: #0d8f4b;
  --green-soft: #e9fbf1;
  --ink: #17191c;
  --muted: #6f767e;
  --line: #e8ecef;
  --panel: #ffffff;
  --bg: #f7faf8;
  --shadow: 0 24px 70px rgba(20, 55, 36, .12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 4%, rgba(22, 199, 106, .15), transparent 28%),
    radial-gradient(circle at 90% 12%, rgba(13, 143, 75, .12), transparent 25%),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 16px 24px 0;
}

.nav {
  max-width: 1120px;
  height: 72px;
  margin: 0 auto;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid rgba(255, 255, 255, .75);
  border-radius: 24px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 10px 30px rgba(20, 55, 36, .08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(145deg, #17d873, #0ca956);
  box-shadow: 0 10px 20px rgba(22, 199, 106, .24);
}

.brand-mark svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: #fff;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
  color: var(--muted);
}

.nav-actions a:hover {
  color: var(--green-dark);
}

.lang-button {
  min-width: 58px;
  height: 38px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font-weight: 800;
  background: var(--ink);
  cursor: pointer;
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  min-height: calc(100vh - 88px);
  padding: 78px 24px 70px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  align-items: center;
  gap: 64px;
}

.eyebrow,
.section-title p,
.support-copy p:first-child {
  margin: 0 0 16px;
  color: var(--green-dark);
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  max-width: 690px;
  font-size: clamp(48px, 6vw, 76px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-desc {
  max-width: 620px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.primary-button,
.secondary-button {
  height: 52px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-weight: 800;
}

.primary-button {
  color: #fff;
  background: linear-gradient(145deg, #18d873, #0da553);
  box-shadow: 0 18px 34px rgba(22, 199, 106, .28);
}

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

.phone-card {
  display: flex;
  justify-content: center;
}

.phone {
  width: 330px;
  height: 650px;
  padding: 16px;
  border: 8px solid #141414;
  border-radius: 48px;
  background: #050505;
  box-shadow: var(--shadow);
  position: relative;
}

.phone-speaker {
  position: absolute;
  top: 18px;
  left: 50%;
  width: 92px;
  height: 24px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: #050505;
  z-index: 2;
}

.phone-screen {
  height: 100%;
  padding: 52px 18px 18px;
  border-radius: 34px;
  background: linear-gradient(#fff, #f7fbf8);
  overflow: hidden;
}

.app-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-size: 20px;
  font-weight: 800;
}

.app-top strong {
  color: var(--green-dark);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.stat-row div {
  padding: 12px 6px;
  border-radius: 16px;
  background: var(--green-soft);
  text-align: center;
}

.stat-row strong,
.stat-row span {
  display: block;
}

.stat-row strong {
  font-size: 22px;
}

.stat-row span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.plan-card,
.check-list {
  padding: 16px;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(20, 55, 36, .08);
}

.plan-card strong,
.plan-card span {
  display: block;
}

.plan-card span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.progress-blocks {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin: 16px 0 10px;
}

.progress-blocks i {
  height: 10px;
  border-radius: 999px;
  background: var(--green);
}

.progress-blocks .empty {
  background: #dfe5e1;
}

.plan-card p {
  margin-bottom: 0;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 800;
}

.check-list {
  margin-top: 14px;
}

.check-list p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.check-list p:last-child {
  border-bottom: 0;
}

.check-list span {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--green);
}

.check-list span.off {
  background: #dfe5e1;
}

.check-list b {
  font-size: 14px;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 70px 24px;
}

.section-title {
  max-width: 680px;
  margin-bottom: 30px;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.15;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-grid article {
  min-height: 248px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, .88);
  border-radius: 26px;
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 14px 44px rgba(20, 55, 36, .07);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: var(--green);
  font-weight: 900;
}

h3 {
  margin: 24px 0 10px;
  font-size: 22px;
}

.feature-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.support-section {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, .7fr);
  gap: 34px;
  align-items: center;
}

.support-copy h2 {
  margin-bottom: 18px;
}

.support-copy p:last-child {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.support-card {
  padding: 12px;
  border-radius: 28px;
  background: #fff;
  box-shadow: var(--shadow);
}

.support-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
  padding: 0 18px;
  border-radius: 18px;
}

.support-row:hover {
  background: var(--green-soft);
}

.support-row span {
  color: var(--muted);
}

.support-row strong {
  color: var(--green-dark);
  text-align: right;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 10px 34px rgba(20, 55, 36, .06);
  text-align: left;
  cursor: pointer;
}

.faq-item span {
  min-height: 72px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--ink);
  font-size: 18px;
  font-weight: 850;
}

.faq-item span::after {
  content: "+";
  color: var(--green-dark);
  font-size: 28px;
  line-height: 1;
}

.faq-item.is-open span::after {
  content: "-";
}

.faq-item p {
  display: none;
  margin: 0;
  padding: 0 24px 24px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.faq-item.is-open p {
  display: block;
}

.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 24px 54px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .nav {
    height: auto;
    padding: 14px;
    align-items: flex-start;
    gap: 12px;
  }

  .nav-actions {
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero,
  .support-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 54px;
    gap: 38px;
  }

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

@media (max-width: 620px) {
  .site-header {
    padding: 10px 10px 0;
  }

  .brand-text {
    display: none;
  }

  .nav-actions {
    font-size: 13px;
  }

  .hero,
  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .phone {
    width: min(330px, 100%);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .support-row {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 16px 18px;
  }

  .support-row strong {
    text-align: left;
  }

  .footer {
    flex-direction: column;
  }
}