:root {
  --ink: #17201d;
  --ink-soft: #40534d;
  --muted: #64726d;
  --line: #dce9e4;
  --page: #f3f8f6;
  --surface: #ffffff;
  --mint: #e7f6f1;
  --teal: #0f7b6c;
  --teal-dark: #075b50;
  --teal-bright: #16b995;
  --coral: #f15d6c;
  --radius: 14px;
  --shell: min(1120px, calc(100% - 40px));
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--page);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--page); color: var(--ink); }
a { color: inherit; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 20;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(15, 123, 108, .12);
  background: rgba(243, 248, 246, .92);
  backdrop-filter: blur(14px);
}
.nav-shell {
  width: var(--shell);
  height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 750;
  text-decoration: none;
}
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 5px 8px rgba(15, 123, 108, .2);
}
nav { display: flex; align-items: center; gap: 28px; }
nav a {
  padding: 10px 2px;
  color: var(--ink-soft);
  font-size: 14px;
  text-decoration: none;
}
nav a:hover, nav a:focus-visible { color: var(--teal); }

.hero {
  width: var(--shell);
  min-height: 680px;
  margin: auto;
  padding: clamp(70px, 9vw, 126px) 0 86px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 470px);
  align-items: center;
  gap: clamp(54px, 8vw, 110px);
}
.hero-copy { max-width: 620px; }
.hero-note {
  margin: 0 0 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--teal);
  font-size: 15px;
  font-weight: 650;
}
.hero-note span { width: 30px; height: 2px; background: var(--teal-bright); }
h1 {
  margin: 0;
  max-width: 12em;
  font-size: clamp(48px, 6.2vw, 82px);
  line-height: 1.08;
  letter-spacing: -.035em;
  font-weight: 800;
  text-wrap: balance;
}
.hero-lead {
  max-width: 33em;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.85;
  text-wrap: pretty;
}
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.wechat-search {
  min-width: 238px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-radius: 12px;
  background: var(--teal);
  color: #fff;
  box-shadow: 0 7px 8px rgba(15, 123, 108, .2);
}
.search-icon {
  width: 19px;
  height: 19px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
  opacity: .9;
}
.search-icon::after {
  content: "";
  position: absolute;
  right: -6px;
  bottom: -4px;
  width: 7px;
  height: 2px;
  background: currentColor;
  transform: rotate(45deg);
  border-radius: 2px;
}
.wechat-search span:last-child { display: flex; flex-direction: column; gap: 3px; }
.wechat-search small { font-size: 11px; opacity: .72; }
.wechat-search strong { font-size: 16px; }
.text-link { color: var(--teal-dark); font-weight: 650; text-decoration: none; }
.text-link:hover, .text-link:focus-visible { text-decoration: underline; text-underline-offset: 5px; }
.hero-facts {
  margin: 32px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
}
.hero-facts li::before { content: "•"; margin-right: 8px; color: var(--teal-bright); }

.product-visual { position: relative; justify-self: center; width: min(100%, 430px); }
.phone-frame {
  width: min(340px, 86vw);
  height: 580px;
  margin-left: auto;
  padding: 18px 10px 10px;
  border: 9px solid #17201d;
  border-radius: 46px;
  background: #17201d;
  box-shadow: 0 22px 44px rgba(10, 50, 43, .2);
  overflow: hidden;
  position: relative;
}
.phone-speaker {
  position: absolute;
  top: 7px;
  left: 50%;
  z-index: 2;
  width: 92px;
  height: 20px;
  border-radius: 0 0 14px 14px;
  background: #17201d;
  transform: translateX(-50%);
}
.phone-frame img { width: 100%; height: 100%; border-radius: 30px; object-fit: cover; object-position: top; }
.visual-caption {
  position: absolute;
  left: 0;
  bottom: 54px;
  width: 218px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 8px 12px rgba(15, 91, 79, .14);
}
.visual-caption strong { color: var(--teal-dark); font-size: 16px; }
.visual-caption span { color: var(--muted); font-size: 12px; line-height: 1.5; }

.flow-section { padding: clamp(74px, 9vw, 116px) max(20px, calc((100% - 1120px) / 2)); background: #fff; }
.section-heading { max-width: 660px; }
.section-heading h2, .trust-copy h2, .closing-section h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.18;
  letter-spacing: -.025em;
  text-wrap: balance;
}
.section-heading p, .trust-copy p, .closing-section p { margin: 18px 0 0; color: var(--muted); font-size: 17px; line-height: 1.75; }
.flow-list { margin: 58px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.flow-list li {
  min-height: 146px;
  padding: 30px 0;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: start;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.step-number { color: var(--teal); font-size: 18px; font-weight: 750; }
.flow-list h3 { margin: 0; font-size: 24px; }
.flow-list p { max-width: 680px; margin: 12px 0 0; color: var(--ink-soft); font-size: 16px; line-height: 1.75; }

.trust-section {
  padding: clamp(76px, 9vw, 120px) max(20px, calc((100% - 1120px) / 2));
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(50px, 8vw, 110px);
  background: var(--teal-dark);
  color: #fff;
}
.trust-copy p { color: #d5ece5; }
.trust-points { border-top: 1px solid rgba(255,255,255,.24); }
.trust-points div { padding: 26px 0; display: grid; grid-template-columns: minmax(160px, .7fr) 1fr; gap: 28px; border-bottom: 1px solid rgba(255,255,255,.24); }
.trust-points strong { font-size: 17px; }
.trust-points span { color: #d5ece5; font-size: 14px; line-height: 1.75; }

.closing-section {
  width: var(--shell);
  min-height: 310px;
  margin: auto;
  padding: 74px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.closing-mark { color: var(--coral); font-size: clamp(90px, 13vw, 180px); font-weight: 800; line-height: 1; opacity: .9; }

footer { padding: 44px 0 28px; background: #14231f; color: #fff; }
.footer-shell { width: var(--shell); margin: auto; display: flex; justify-content: space-between; gap: 34px; }
.footer-shell > div:first-child { display: flex; flex-direction: column; gap: 9px; }
.footer-shell strong { font-size: 18px; }
.footer-shell span { color: #aebfba; font-size: 13px; }
.footer-links { max-width: 630px; display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 12px 24px; }
.footer-links a { color: #d8e5e1; font-size: 13px; text-decoration: none; }
.footer-links a:hover, .footer-links a:focus-visible { color: #fff; text-decoration: underline; }
.copyright { width: var(--shell); margin: 34px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); color: #82958f; font-size: 12px; }

.legal-page { background: #f3f8f6; }
.legal-main { width: min(820px, calc(100% - 40px)); margin: auto; padding: 70px 0 100px; }
.legal-back { display: inline-flex; margin-bottom: 36px; color: var(--teal); font-weight: 650; text-decoration: none; }
.legal-back:hover, .legal-back:focus-visible { text-decoration: underline; text-underline-offset: 5px; }
.legal-header { padding-bottom: 32px; border-bottom: 1px solid var(--line); }
.legal-header h1 { max-width: none; font-size: clamp(36px, 6vw, 58px); }
.legal-header p { margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.legal-summary { margin: 32px 0 52px; padding: 22px 24px; border-radius: 12px; background: var(--mint); color: #285b50; font-size: 15px; line-height: 1.8; }
.legal-section { margin-top: 42px; }
.legal-section h2 { margin: 0 0 14px; font-size: 22px; }
.legal-section p { margin: 10px 0; color: var(--ink-soft); font-size: 16px; line-height: 1.9; }

:focus-visible { outline: 3px solid rgba(22, 185, 149, .45); outline-offset: 4px; border-radius: 4px; }

@media (max-width: 860px) {
  .nav-shell { height: 66px; }
  nav a:nth-child(-n+2) { display: none; }
  .hero { min-height: 0; padding-top: 62px; grid-template-columns: 1fr; text-align: left; }
  .hero-copy { max-width: 660px; }
  .product-visual { width: min(100%, 400px); }
  .phone-frame { margin: auto; }
  .trust-section { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  :root { --shell: min(100% - 28px, 1120px); }
  nav { gap: 14px; }
  nav a { font-size: 12px; }
  .brand { font-size: 15px; }
  .brand-mark { width: 34px; height: 34px; font-size: 16px; }
  .hero { padding: 48px 0 64px; gap: 54px; }
  h1 { font-size: clamp(42px, 13vw, 58px); }
  .hero-lead { font-size: 16px; line-height: 1.75; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 18px; }
  .wechat-search { width: 100%; }
  .phone-frame { height: 530px; }
  .visual-caption { left: -4px; bottom: 32px; width: 194px; }
  .flow-section, .trust-section { padding-left: 20px; padding-right: 20px; }
  .flow-list { margin-top: 42px; }
  .flow-list li { grid-template-columns: 54px 1fr; gap: 12px; }
  .trust-points div { grid-template-columns: 1fr; gap: 10px; }
  .closing-section { min-height: 240px; }
  .closing-mark { font-size: 88px; }
  .footer-shell { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .legal-main { width: min(100% - 32px, 820px); padding-top: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}