:root {
  --ink: #2b183f;
  --ink-soft: #584e60;
  --purple: #533273;
  --purple-dark: #281538;
  --purple-pale: #f3edf7;
  --orange: #f58219;
  --orange-dark: #d96708;
  --orange-pale: #fff0df;
  --cream: #fbf7f0;
  --paper: #fffdf9;
  --line: rgba(43, 24, 63, 0.12);
  --container: 1180px;
  --shadow: 0 30px 80px rgba(50, 29, 66, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Songti SC", "STSong", "Noto Serif SC", "PingFang SC", "Microsoft YaHei", serif;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

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

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  color: #fff;
  background: var(--purple-dark);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(43, 24, 63, 0.07);
  background: rgba(255, 253, 249, 0.93);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.brand {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand img {
  width: 32px;
  height: 38px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 48px;
  color: #43384d;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
}

.main-nav a,
.header-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--purple);
}

.header-action {
  justify-self: end;
  padding: 0 21px;
  border-radius: 9px;
  color: #fff;
  background: var(--purple-dark);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease;
}

.header-action:hover,
.header-action:focus-visible {
  background: var(--purple);
  transform: translateY(-1px);
}

.hero {
  min-height: 700px;
  display: flex;
  align-items: stretch;
  background-color: #f2e9df;
  background-image:
    linear-gradient(90deg, rgba(251, 247, 240, 0.98) 0%, rgba(251, 247, 240, 0.92) 32%, rgba(251, 247, 240, 0.18) 58%, rgba(251, 247, 240, 0) 100%),
    url("assets/hero-crystal.jpg");
  background-repeat: no-repeat;
  background-position: center, center;
  background-size: cover, cover;
}

.hero-inner {
  display: flex;
  align-items: center;
  padding-block: 94px;
}

.hero-copy {
  max-width: 660px;
}

.section-kicker {
  margin: 0 0 24px;
  color: var(--purple);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 5vw, 72px);
  line-height: 1.28;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.hero-summary {
  margin: 29px 0 26px;
  color: #463b4c;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 18px;
  line-height: 1.8;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 0;
  border-bottom: 2px solid var(--orange);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  font-weight: 700;
}

.text-link svg,
.primary-action svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.about-section {
  padding: 94px 0 98px;
  background: #fff;
  text-align: center;
}

.about-inner {
  max-width: 900px;
}

.about-inner .section-kicker {
  margin-bottom: 14px;
}

.about-section h2,
.product-section h2 {
  margin: 0;
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.short-rule {
  width: 40px;
  height: 3px;
  display: block;
  margin: 22px auto 26px;
  background: var(--orange);
}

.about-lead {
  max-width: 760px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 19px;
  line-height: 1.9;
}

.about-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
  text-align: left;
}

.about-points li {
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fffdf9;
}

.about-points strong,
.about-points span {
  display: block;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.about-points strong {
  margin-bottom: 9px;
  color: var(--ink);
  font-size: 17px;
}

.about-points span {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.product-section {
  overflow: hidden;
  padding: 100px 0 76px;
  background:
    radial-gradient(circle at 80% 48%, rgba(111, 71, 151, 0.11), transparent 28rem),
    linear-gradient(180deg, #fcf8f3 0%, #fffdf9 100%);
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(390px, 0.75fr);
  align-items: center;
  gap: 90px;
}

.product-copy .section-kicker {
  margin-bottom: 17px;
}

.product-copy .short-rule {
  margin: 0 0 60px;
}

.product-section h2 {
  font-size: clamp(52px, 6vw, 76px);
}

.product-subtitle {
  margin: 10px 0 18px;
  color: #4e4653;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 22px;
}

.product-description {
  max-width: 520px;
  margin: 0 0 34px;
  color: var(--ink-soft);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.85;
}

.benefit-list {
  display: grid;
  gap: 22px;
  margin: 0 0 46px;
  padding: 0;
  list-style: none;
}

.benefit-list li {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  color: #403548;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 18px;
}

.benefit-copy {
  display: grid;
  gap: 5px;
  padding-top: 2px;
}

.benefit-copy strong {
  font-size: 18px;
  line-height: 1.45;
}

.benefit-copy small {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
}

.benefit-icon {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--purple);
  background: var(--purple-pale);
}

.benefit-icon svg {
  width: 27px;
  height: 27px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.primary-action {
  min-height: 56px;
  width: fit-content;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  border-radius: 8px;
  color: #fff;
  background: var(--orange);
  box-shadow: 0 14px 30px rgba(245, 130, 25, 0.22);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease;
}

.primary-action:hover,
.primary-action:focus-visible {
  background: var(--orange-dark);
  transform: translateY(-2px);
}

.product-visual {
  min-height: 620px;
  position: relative;
  display: grid;
  place-items: center;
}

.phone-shadow {
  position: absolute;
  left: 50%;
  bottom: 40px;
  width: 350px;
  height: 78px;
  border-radius: 50%;
  background: rgba(42, 24, 55, 0.18);
  filter: blur(34px);
  transform: translateX(-50%);
}

.phone-frame {
  position: relative;
  z-index: 1;
  width: min(330px, 86%);
  padding: 12px;
  border: 3px solid #201d23;
  border-radius: 48px;
  background: #18171a;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-speaker {
  position: absolute;
  top: 17px;
  left: 50%;
  z-index: 2;
  width: 95px;
  height: 23px;
  border-radius: 99px;
  background: #18171a;
  transform: translateX(-50%);
}

.phone-brand-bar {
  position: absolute;
  top: 12px;
  right: 12px;
  left: 12px;
  z-index: 1;
  height: 64px;
  padding: 18px 16px 7px;
  display: flex;
  align-items: center;
  gap: 7px;
  border-radius: 40px 40px 0 0;
  color: #3d2463;
  background: rgba(255, 253, 249, 0.98);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  white-space: nowrap;
}

.phone-brand-bar img {
  width: 26px;
  height: 26px;
  object-fit: contain;
}

.phone-frame > img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 5;
  display: block;
  object-fit: contain;
  border-radius: 34px;
}

.contact-section {
  overflow: hidden;
  padding: 66px 0 74px;
  background:
    radial-gradient(circle at 84% 42%, rgba(83, 50, 115, 0.12), transparent 28rem),
    radial-gradient(circle at 76% 76%, rgba(245, 130, 25, 0.08), transparent 21rem),
    linear-gradient(180deg, #fcf8f3 0%, #fffdf9 100%);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 430px);
  align-items: center;
  gap: 92px;
}

.contact-section h2 {
  margin: 0;
  font-size: clamp(46px, 4.6vw, 62px);
  line-height: 1.22;
  letter-spacing: -0.045em;
}

.contact-copy .section-kicker {
  margin-bottom: 16px;
}

.contact-copy .short-rule {
  margin: 20px 0 24px;
}

.contact-lead {
  max-width: 590px;
  margin: 0 0 30px;
  color: var(--ink-soft);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.85;
}

.contact-list {
  max-width: 620px;
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 14px;
}

.contact-row {
  min-height: 122px;
  padding: 19px 20px;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 253, 249, 0.9);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

a.contact-row {
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

a.contact-row:hover,
a.contact-row:focus-visible {
  border-color: rgba(83, 50, 115, 0.25);
  box-shadow: 0 12px 28px rgba(50, 29, 66, 0.08);
  transform: translateY(-1px);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--purple);
  background: var(--purple-pale);
}

.contact-row.email .contact-icon {
  color: #b75e0b;
  background: var(--orange-pale);
}

.contact-icon svg {
  width: 27px;
  height: 27px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-label {
  display: block;
  margin-bottom: 5px;
  color: var(--ink-soft);
  font-size: 13px;
}

.contact-value {
  display: block;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.contact-hint {
  display: block;
  margin-top: 5px;
  color: #786d7d;
  font-size: 12px;
  line-height: 1.55;
}

.qr-card {
  position: relative;
  width: 100%;
  padding: 18px;
  border: 1px solid rgba(43, 24, 63, 0.11);
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 28px 70px rgba(50, 29, 66, 0.15);
}

.qr-card::before {
  content: "";
  position: absolute;
  inset: -20px 48px auto -24px;
  z-index: -1;
  height: 220px;
  border-radius: 90px;
  background: rgba(245, 130, 25, 0.1);
  transform: rotate(-4deg);
}

.qr-heading {
  padding: 2px 4px 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.wechat-badge {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: var(--purple);
}

.wechat-badge svg {
  width: 27px;
  height: 27px;
  fill: currentColor;
}

.qr-heading strong {
  display: block;
  font-size: 18px;
}

.qr-heading span span {
  display: block;
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 13px;
}

.qr-image-wrap {
  padding: 10px;
  border: 1px solid rgba(43, 24, 63, 0.07);
  border-radius: 20px;
  background: #faf8fb;
}

.qr-image {
  width: 100%;
  max-width: 888px;
  height: auto;
  aspect-ratio: auto;
  display: block;
  object-fit: contain;
  border-radius: 12px;
}

.qr-caption {
  margin: 13px 4px 1px;
  color: var(--ink-soft);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
}

.qr-caption strong {
  color: var(--ink);
}

.site-footer {
  padding: 48px 0;
  color: rgba(255, 255, 255, 0.82);
  background: linear-gradient(110deg, #271536, #3c1f53);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a:hover,
.footer-inner a:focus-visible {
  color: #fff;
  text-decoration: underline;
}

@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .main-nav {
    display: none;
  }

  .hero {
    min-height: 720px;
    background-image:
      linear-gradient(180deg, rgba(251, 247, 240, 0.99) 0%, rgba(251, 247, 240, 0.92) 42%, rgba(251, 247, 240, 0.08) 74%),
      url("assets/hero-crystal.jpg");
    background-position: center, 65% center;
  }

  .hero-inner {
    align-items: flex-start;
    padding-top: 76px;
  }

  .hero-copy {
    max-width: 630px;
  }

  .product-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .product-copy {
    max-width: 620px;
  }

  .product-visual {
    min-height: 600px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .contact-copy {
    max-width: 650px;
  }

  .qr-card {
    width: min(480px, 100%);
    margin-inline: auto;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .header-inner {
    min-height: 66px;
    gap: 14px;
  }

  .brand {
    gap: 8px;
    font-size: 18px;
  }

  .brand img {
    width: 27px;
    height: 32px;
  }

  .header-action {
    min-height: 40px;
    padding: 0 14px;
    font-size: 13px;
  }

  .hero {
    min-height: 720px;
    background-size: auto, auto 57%;
    background-position: center, 64% bottom;
  }

  .hero-inner {
    padding-top: 58px;
  }

  .section-kicker {
    margin-bottom: 17px;
    font-size: 12px;
  }

  .hero h1 {
    font-size: clamp(35px, 10vw, 46px);
    line-height: 1.32;
    letter-spacing: -0.05em;
  }

  .hero-summary {
    max-width: 330px;
    margin: 20px 0 15px;
    font-size: 16px;
    line-height: 1.7;
  }

  .about-section {
    padding: 70px 0 74px;
  }

  .about-section h2,
  .product-section h2 {
    font-size: 36px;
  }

  .about-lead {
    font-size: 16px;
    line-height: 1.85;
  }

  .about-points {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 32px;
  }

  .about-points li {
    padding: 20px;
  }

  .product-section {
    padding: 76px 0 56px;
  }

  .product-copy .short-rule {
    margin-bottom: 40px;
  }

  .product-section h2 {
    font-size: 50px;
  }

  .product-subtitle {
    margin-bottom: 16px;
    font-size: 19px;
  }

  .product-description {
    margin-bottom: 28px;
    font-size: 15px;
  }

  .benefit-list {
    gap: 16px;
    margin-bottom: 34px;
  }

  .benefit-list li {
    gap: 14px;
  }

  .benefit-copy strong {
    font-size: 16px;
  }

  .benefit-copy small {
    font-size: 13px;
  }

  .benefit-icon {
    flex-basis: 44px;
    width: 44px;
    height: 44px;
  }

  .primary-action {
    width: 100%;
  }

  .product-visual {
    min-height: 540px;
  }

  .phone-frame {
    width: min(300px, 88%);
    border-radius: 44px;
  }

  .phone-frame > img {
    border-radius: 34px;
  }

  .phone-shadow {
    width: 300px;
  }

  .contact-section {
    padding: 54px 0 60px;
  }

  .contact-layout {
    gap: 30px;
  }

  .contact-section h2 {
    font-size: 41px;
    line-height: 1.28;
  }

  .contact-copy .section-kicker {
    margin-bottom: 13px;
  }

  .contact-copy .short-rule {
    margin: 19px 0 22px;
  }

  .contact-lead {
    margin-bottom: 26px;
    font-size: 16px;
    line-height: 1.8;
  }

  .contact-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .contact-row {
    min-height: 94px;
    padding: 17px 16px;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
  }

  .contact-value {
    font-size: 17px;
  }

  .qr-card {
    padding: 14px;
    border-radius: 23px;
  }

  .qr-heading {
    padding: 2px 2px 13px;
  }

  .qr-image-wrap {
    padding: 8px;
    border-radius: 17px;
  }

  .qr-image {
    border-radius: 10px;
  }

  .site-footer {
    padding: 36px 0;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}