:root {
  --auth-ink: #252526;
  --auth-muted: #66635f;
  --auth-paper: #f5f2ed;
  --auth-white: #fff;
  --auth-gold: #b99769;
  --auth-line: rgba(37, 37, 38, .14);
  --auth-dark: #222324;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--auth-white);
  color: var(--auth-ink);
  font-family: Lato, Arial, Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 300;
  line-height: 1.75;
}

body.authenticity-page--zh {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

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

a {
  color: inherit;
}

.auth-main {
  overflow: hidden;
}

.auth-container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.auth-eyebrow,
.auth-kicker {
  margin: 0 0 18px;
  color: var(--auth-gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  line-height: 1.5;
  text-transform: uppercase;
}

.auth-hero {
  position: relative;
  min-height: min(880px, 94vh);
  display: grid;
  align-items: end;
  padding: 180px 0 110px;
  background: #171717 url("../img/09.jpg") center center / cover no-repeat;
  color: var(--auth-white);
}

.auth-hero::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 10, 10, .78) 0%, rgba(10, 10, 10, .44) 48%, rgba(10, 10, 10, .18) 100%),
    linear-gradient(0deg, rgba(8, 8, 8, .56) 0%, transparent 55%);
  content: "";
}

.auth-hero__content {
  position: relative;
  z-index: 1;
  width: min(690px, 100%);
}

.auth-hero h1,
.auth-section-heading h2,
.auth-split h2,
.auth-points h2,
.auth-verify h2 {
  margin: 0;
  font-family: "Playfair Display", Georgia, "Times New Roman", serif;
  font-weight: 400;
  line-height: 1.08;
}

.authenticity-page--zh .auth-hero h1,
.authenticity-page--zh .auth-section-heading h2,
.authenticity-page--zh .auth-split h2,
.authenticity-page--zh .auth-points h2,
.authenticity-page--zh .auth-verify h2 {
  font-family: "Noto Serif SC", "Songti SC", STSong, Georgia, serif;
}

.auth-hero h1 {
  max-width: 720px;
  font-size: clamp(46px, 6.4vw, 86px);
  letter-spacing: -.025em;
}

.auth-hero__lead {
  max-width: 620px;
  margin: 28px 0 34px;
  color: rgba(255, 255, 255, .84);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.75;
}

.auth-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border: 1px solid var(--auth-gold);
  background: var(--auth-gold);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color .25s ease, border-color .25s ease, color .25s ease;
}

.auth-button:hover,
.auth-button:focus-visible {
  border-color: #96764f;
  background: #96764f;
}

.auth-button--outline {
  border-color: rgba(255, 255, 255, .6);
  background: transparent;
}

.auth-button--outline:hover,
.auth-button--outline:focus-visible {
  border-color: #fff;
  background: #fff;
  color: var(--auth-dark);
}

.auth-button:focus-visible,
.auth-faq summary:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

.auth-intro {
  padding: 118px 0 112px;
  background: var(--auth-white);
}

.auth-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr);
  gap: clamp(55px, 8vw, 120px);
  align-items: start;
}

.auth-section-heading h2,
.auth-split h2,
.auth-points h2,
.auth-verify h2 {
  font-size: clamp(36px, 4.3vw, 58px);
}

.auth-intro__copy p,
.auth-split__copy > p,
.auth-section-heading > p:last-child {
  margin: 0 0 18px;
  color: var(--auth-muted);
}

.auth-intro__copy p:first-child {
  color: var(--auth-ink);
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.55;
}

.auth-card-section,
.auth-system {
  padding: 116px 0;
  background: var(--auth-paper);
}

.auth-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(50px, 8vw, 110px);
  align-items: center;
}

.auth-split--reverse .auth-split__media {
  order: 2;
}

.auth-split__media {
  position: relative;
  min-width: 0;
}

.auth-split__media::after {
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 42%;
  height: 42%;
  border-right: 1px solid var(--auth-gold);
  border-bottom: 1px solid var(--auth-gold);
  content: "";
  pointer-events: none;
}

.auth-split__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #ece9e4;
}

.auth-split__copy h2 {
  margin-bottom: 26px;
}

.auth-feature-list {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: auth-features;
}

.auth-feature-list li {
  position: relative;
  min-height: 74px;
  margin: 0;
  padding: 0 0 24px 64px;
  border-bottom: 1px solid var(--auth-line);
  counter-increment: auth-features;
}

.auth-feature-list li + li {
  padding-top: 24px;
}

.auth-feature-list li::before {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--auth-gold);
  content: "0" counter(auth-features);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 22px;
}

.auth-feature-list li + li::before {
  top: 24px;
}

.auth-feature-list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 700;
}

.auth-feature-list span {
  display: block;
  color: var(--auth-muted);
  font-size: 14px;
}

.auth-note {
  margin: 28px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--auth-gold);
  color: var(--auth-muted);
  font-size: 14px;
}

.auth-points {
  position: relative;
  padding: 116px 0;
  overflow: hidden;
  background: var(--auth-dark);
  color: #fff;
}

.auth-points::before {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  border: 1px solid rgba(185, 151, 105, .25);
  border-radius: 50%;
  content: "";
}

.auth-points__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(190px, .58fr) minmax(0, 1.42fr);
  gap: clamp(50px, 9vw, 130px);
  align-items: center;
}

.auth-points__stat {
  padding-right: 35px;
  border-right: 1px solid rgba(255, 255, 255, .16);
}

.auth-points__number {
  display: block;
  color: var(--auth-gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(72px, 10vw, 132px);
  font-weight: 400;
  line-height: .88;
}

.auth-points__unit {
  display: block;
  margin-top: 15px;
  color: rgba(255, 255, 255, .66);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .24em;
  text-transform: uppercase;
}

.auth-points h2 {
  margin-bottom: 24px;
}

.auth-points__copy > p:not(.auth-kicker) {
  max-width: 700px;
  margin: 0 0 30px;
  color: rgba(255, 255, 255, .7);
}

.auth-system {
  background: #fff;
}

.auth-system .auth-split__media img {
  object-fit: contain;
  padding: 8%;
  background: #f1f1f1;
}

.auth-security-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
}

.auth-security-tags span {
  padding: 9px 13px;
  border: 1px solid var(--auth-line);
  color: var(--auth-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.auth-steps {
  padding: 116px 0;
  background: var(--auth-paper);
}

.auth-section-heading {
  max-width: 750px;
  margin-bottom: 54px;
}

.auth-section-heading h2 {
  margin-bottom: 22px;
}

.auth-steps__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--auth-line);
  border: 1px solid var(--auth-line);
}

.auth-step {
  min-height: 286px;
  padding: 36px 30px;
  background: #fff;
}

.auth-step__number {
  display: block;
  margin-bottom: 54px;
  color: var(--auth-gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 30px;
  line-height: 1;
}

.auth-step h3 {
  margin: 0 0 13px;
  font-family: "Playfair Display", Georgia, serif;
  font-size: 24px;
  font-weight: 400;
  line-height: 1.25;
}

.authenticity-page--zh .auth-step h3 {
  font-family: "Noto Serif SC", "Songti SC", STSong, serif;
}

.auth-step p {
  margin: 0;
  color: var(--auth-muted);
  font-size: 14px;
}

.auth-verify {
  position: relative;
  padding: 130px 0;
  background:
    linear-gradient(rgba(25, 25, 25, .9), rgba(25, 25, 25, .9)),
    url("../img/09.jpg") center 62% / cover no-repeat;
  color: #fff;
  text-align: center;
  scroll-margin-top: 100px;
}

.auth-verify__inner {
  width: min(760px, 100%);
  margin: 0 auto;
}

.auth-verify h2 {
  margin-bottom: 24px;
}

.auth-verify p:not(.auth-kicker) {
  margin: 0 auto 34px;
  color: rgba(255, 255, 255, .72);
}

.auth-wechat {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  width: min(660px, 100%);
  margin: 38px auto 0;
  padding: 26px 28px;
  border: 1px solid rgba(255, 255, 255, .2);
  background: rgba(255, 255, 255, .06);
  text-align: left;
}

.auth-wechat__title {
  margin: 0 0 7px;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.auth-verify .auth-wechat p {
  margin: 0;
  color: rgba(255, 255, 255, .68);
  font-size: 14px;
  line-height: 1.75;
}

.auth-wechat__qr {
  width: 112px;
  height: 112px;
  padding: 6px;
  background: #fff;
  object-fit: contain;
}

.auth-faq {
  padding: 110px 0 120px;
  background: #fff;
}

.auth-faq__list {
  border-top: 1px solid var(--auth-line);
}

.auth-faq details {
  border-bottom: 1px solid var(--auth-line);
}

.auth-faq summary {
  position: relative;
  padding: 26px 50px 26px 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
  list-style: none;
}

.auth-faq summary::-webkit-details-marker {
  display: none;
}

.auth-faq summary::after {
  position: absolute;
  top: 50%;
  right: 10px;
  color: var(--auth-gold);
  content: "+";
  font-size: 26px;
  font-weight: 300;
  transform: translateY(-50%);
}

.auth-faq details[open] summary::after {
  content: "\2212";
}

.auth-faq details p {
  max-width: 840px;
  margin: -5px 0 28px;
  color: var(--auth-muted);
}

@media (max-width: 900px) {
  .auth-intro,
  .auth-card-section,
  .auth-system,
  .auth-steps,
  .auth-faq,
  .auth-points {
    padding-block: 82px;
  }

  .auth-intro__grid,
  .auth-split,
  .auth-points__grid {
    grid-template-columns: 1fr;
  }

  .auth-split--reverse .auth-split__media {
    order: 0;
  }

  .auth-points__stat {
    padding: 0 0 34px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, .16);
  }

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

  .auth-step {
    min-height: 250px;
  }
}

@media (max-width: 600px) {
  .auth-container {
    width: min(100% - 32px, 1180px);
  }

  .auth-hero {
    min-height: 720px;
    padding: 150px 0 74px;
    background-position: 58% center;
  }

  .auth-hero::before {
    background: linear-gradient(90deg, rgba(8, 8, 8, .8), rgba(8, 8, 8, .34)), linear-gradient(0deg, rgba(8, 8, 8, .64), transparent 65%);
  }

  .auth-hero h1 {
    font-size: clamp(42px, 13vw, 60px);
  }

  .auth-intro,
  .auth-card-section,
  .auth-system,
  .auth-steps,
  .auth-faq,
  .auth-points {
    padding-block: 68px;
  }

  .auth-split {
    gap: 42px;
  }

  .auth-split__media::after {
    right: -9px;
    bottom: -9px;
  }

  .auth-feature-list li {
    padding-left: 50px;
  }

  .auth-steps__grid {
    grid-template-columns: 1fr;
  }

  .auth-step {
    min-height: 0;
    padding: 30px 26px;
  }

  .auth-step__number {
    margin-bottom: 32px;
  }

  .auth-verify {
    padding: 92px 0;
  }

  .auth-wechat {
    grid-template-columns: 1fr;
    padding: 24px 20px;
    text-align: center;
  }

  .auth-wechat__qr {
    margin-inline: auto;
  }

  .auth-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .auth-button {
    transition: none;
  }
}