:root {
  color-scheme: light;
  --paper: #f7f7f2;
  --paper-strong: #ffffff;
  --ink: #16221c;
  --muted: #5e6b64;
  --line: #d7ddd7;
  --forest: #173c33;
  --forest-soft: #dce8e1;
  --coral: #e0513f;
  --sun: #e6bd67;
  --sky: #dfecef;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body,
button,
a,
input,
textarea {
  letter-spacing: 0;
}

a {
  color: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 247, 242, 0.96);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(var(--max), calc(100% - 40px));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 22px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.wordmark-mark {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  transform: rotate(45deg);
  background: var(--paper);
}

.wordmark-mark span {
  transform: rotate(-45deg);
  font-family: "Songti SC", "STSong", serif;
  font-size: 17px;
}

.wordmark-separator {
  color: var(--coral);
}

.language-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  min-width: 104px;
  min-height: 34px;
  border: 1px solid #b9c2bb;
  border-radius: 5px;
  overflow: hidden;
  background: var(--paper-strong);
}

.language-switch a {
  display: grid;
  place-items: center;
  padding: 5px 9px;
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
}

.language-switch a + a {
  border-left: 1px solid #b9c2bb;
}

.language-switch a[aria-current="true"] {
  background: var(--forest);
  color: #ffffff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  white-space: nowrap;
}

.site-nav a {
  border-bottom: 2px solid transparent;
  padding: 24px 0 21px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--coral);
}

.hero {
  position: relative;
  min-height: clamp(590px, 78svh, 760px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background-color: var(--sky);
  background-image: url("./hero-paths-v1.png");
  background-position: center;
  background-size: cover;
  animation: hero-background-drift 22s ease-in-out infinite alternate;
}

.hero-inner {
  position: relative;
  z-index: 3;
  width: min(720px, calc(100% - 40px));
  min-height: inherit;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 68px 0 92px;
  text-align: center;
}

.hero .hero-lede,
.hero .hero-subline {
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.72);
}

.floating-piece {
  position: absolute;
  z-index: 2;
  width: 20px;
  height: 54px;
  border: 1px solid rgba(122, 105, 65, 0.34);
  background: rgba(255, 255, 255, 0.26);
  pointer-events: none;
  animation: paper-float 8s ease-in-out infinite;
}

.floating-piece-one {
  left: 10%;
  top: 29%;
  transform: rotate(24deg);
}

.floating-piece-two {
  right: 11%;
  top: 22%;
  width: 13px;
  height: 42px;
  transform: rotate(-18deg);
  animation-delay: -2.4s;
}

.floating-piece-three {
  right: 22%;
  bottom: 15%;
  width: 16px;
  height: 36px;
  transform: rotate(36deg);
  animation-delay: -4.5s;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(64px, 9vw, 116px);
  font-weight: 400;
  line-height: 0.92;
}

.hero-chinese {
  margin: 16px 0 22px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(26px, 3vw, 38px);
}

.hero-lede {
  max-width: 580px;
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.45;
}

.hero-subline {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--forest);
  border-radius: 5px;
  padding: 10px 20px;
  background: var(--forest);
  color: #ffffff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.button-secondary {
  background: var(--paper-strong);
  color: var(--forest);
}

.hero-screen {
  position: absolute;
  z-index: 1;
  width: clamp(170px, 18vw, 238px);
  border: 8px solid #101613;
  border-radius: 26px;
  box-shadow: 0 28px 70px rgba(22, 34, 28, 0.18);
  overflow: hidden;
  background: var(--paper-strong);
}

.hero-screen-left {
  left: max(-70px, calc(50% - 650px));
  top: 70px;
  transform: rotate(-5deg);
}

.hero-screen-right {
  right: max(-68px, calc(50% - 650px));
  top: 104px;
  transform: rotate(5deg);
}

.hero-screen-back {
  right: max(70px, calc(50% - 500px));
  bottom: -220px;
  transform: rotate(-2deg);
  opacity: 0.86;
}

.scroll-cue {
  position: absolute;
  z-index: 4;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  animation: scroll-cue-float 2.8s ease-in-out infinite;
}

.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--line);
}

.section-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.section-label {
  margin: 0 0 18px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.section h2 {
  max-width: 820px;
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(38px, 5vw, 68px);
  font-weight: 400;
  line-height: 1.08;
}

.section-intro {
  max-width: 720px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.principles {
  background: var(--paper-strong);
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 62px;
  border-top: 1px solid var(--line);
}

.principle {
  min-height: 230px;
  padding: 32px 28px 28px 0;
  border-right: 1px solid var(--line);
}

.principle + .principle {
  padding-left: 28px;
}

.principle:last-child {
  border-right: 0;
}

.principle-number {
  color: var(--coral);
  font-family: Georgia, serif;
  font-size: 21px;
}

.principle h3 {
  margin: 42px 0 10px;
  font-size: 22px;
  font-weight: 600;
}

.principle p {
  margin: 0;
  color: var(--muted);
}

.product-band {
  overflow: hidden;
  background-color: #285046;
  background-image: url("./product-background-extension-v1.png");
  background-position: center;
  background-size: cover;
  background-blend-mode: multiply;
  color: #f4f6f3;
  animation: product-background-drift 26s ease-in-out infinite alternate;
}

.product-band .section-label {
  color: var(--sun);
}

.product-band .section-intro {
  color: #c7d4ce;
}

.screen-gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(190px, 1fr));
  gap: 24px;
  margin-top: 56px;
  align-items: end;
}

.screen-item {
  margin: 0;
}

.screen-item img {
  width: 100%;
  border: 7px solid #0d1915;
  border-radius: 24px;
  background: var(--paper-strong);
  animation: screen-float 7s ease-in-out infinite;
}

.screen-item:nth-child(2) img,
.screen-item:nth-child(2) .phone-ui {
  animation-delay: -1.4s;
}

.screen-item:nth-child(3) img,
.screen-item:nth-child(3) .phone-ui {
  animation-delay: -2.8s;
}

.screen-item:nth-child(4) img,
.screen-item:nth-child(4) .phone-ui {
  animation-delay: -4.2s;
}

.screen-item figcaption {
  margin-top: 12px;
  color: #bdcbc4;
  font-size: 13px;
}

.phone-ui {
  aspect-ratio: 390 / 844;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 7px solid #0d1915;
  border-radius: 24px;
  background: #fbfaf4;
  color: #18251f;
  animation: screen-float 7s ease-in-out infinite;
}

.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 11px 13px 7px;
  font-size: 9px;
}

.phone-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 15px;
  border-top: 1px solid #e2ded2;
  border-bottom: 1px solid #e2ded2;
  font-size: 11px;
  font-weight: 700;
}

.phone-dot {
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--forest);
  color: #ffffff;
  font-size: 8px;
}

.phone-body {
  flex: 1;
  padding: 18px 15px 14px;
}

.phone-kicker {
  margin: 0 0 6px;
  color: #b07c2c;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
}

.phone-body h3 {
  margin: 0 0 11px;
  font-family: Georgia, serif;
  font-size: clamp(13px, 1.55vw, 20px);
  font-weight: 400;
  line-height: 1.16;
}

.phone-body > p:not(.phone-kicker) {
  margin: 0 0 14px;
  color: #667068;
  font-size: clamp(8px, 0.78vw, 11px);
  line-height: 1.45;
}

.phone-panel {
  margin-top: 10px;
  padding: 12px;
  border: 1px solid #ddd4c4;
  border-radius: 8px;
}

.phone-panel strong {
  display: block;
  margin-bottom: 5px;
  font-size: clamp(8px, 0.82vw, 11px);
}

.phone-panel p {
  margin: 0;
  color: #667068;
  font-size: clamp(7px, 0.72vw, 10px);
  line-height: 1.4;
}

.phone-feature {
  margin: 8px 0 12px;
  padding: 15px 13px;
  border-radius: 8px;
  background: var(--forest);
  color: #ffffff;
}

.phone-feature small {
  display: block;
  color: #d9b768;
  font-size: 8px;
}

.phone-feature strong {
  display: block;
  margin-top: 7px;
  font-family: Georgia, serif;
  font-size: clamp(18px, 2vw, 27px);
  font-weight: 400;
}

.phone-action {
  min-height: 34px;
  display: grid;
  place-items: center;
  margin: 12px 15px 15px;
  border-radius: 18px;
  background: var(--forest);
  color: #ffffff;
  font-size: 9px;
  font-weight: 700;
}

.phone-welcome {
  background: #12352d;
  color: #ffffff;
}

.phone-welcome .phone-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.phone-welcome .phone-body h3 {
  margin-top: 12px;
  color: #ffffff;
  font-size: clamp(22px, 2.6vw, 34px);
}

.phone-welcome .phone-body > p:not(.phone-kicker) {
  color: #dce8e1;
}

.phone-welcome-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  transform: rotate(45deg);
  background: #f8f5ec;
  color: #c99f4c;
  font-family: Georgia, serif;
  font-size: 25px;
}

.phone-welcome-mark span {
  transform: rotate(-45deg);
}

.phone-welcome .phone-action {
  background: #ffffff;
  color: var(--forest);
}

.trust-band {
  background: var(--forest-soft);
}

.trust-list {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 72px;
  margin-top: 48px;
}

.trust-statement {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(28px, 3.3vw, 44px);
  line-height: 1.25;
}

.trust-details {
  border-top: 1px solid #aebdb5;
}

.trust-details p {
  margin: 0;
  padding: 17px 0;
  border-bottom: 1px solid #aebdb5;
}

.legal-hero {
  padding: 92px 0 66px;
  border-bottom: 1px solid var(--line);
  background: var(--sky);
}

.legal-hero-inner,
.legal-content {
  width: min(900px, calc(100% - 40px));
  margin: 0 auto;
}

.legal-hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(46px, 7vw, 78px);
  font-weight: 400;
  line-height: 1.08;
}

.legal-hero p {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--muted);
}

.legal-meta {
  margin-top: 34px;
  font-size: 14px;
}

.legal-content {
  padding: 74px 0 104px;
}

.legal-content section {
  display: grid;
  grid-template-columns: minmax(160px, 240px) minmax(0, 1fr);
  gap: 44px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.legal-content section:last-child {
  border-bottom: 1px solid var(--line);
}

.legal-content h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
}

.legal-copy p:first-child {
  margin-top: 0;
}

.legal-copy p:last-child {
  margin-bottom: 0;
}

.legal-copy ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.legal-copy li {
  margin: 8px 0;
}

.cn-note {
  color: var(--muted);
}

.notice {
  margin: 0 0 38px;
  padding: 18px 20px;
  border-left: 4px solid var(--coral);
  background: #fff3ef;
}

.delete-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.delete-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: deletion-step;
}

.delete-steps li {
  position: relative;
  margin: 0;
  padding: 20px 0 20px 54px;
  border-top: 1px solid var(--line);
  counter-increment: deletion-step;
}

.delete-steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.delete-steps li::before {
  content: counter(deletion-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--coral);
  font-family: Georgia, serif;
  font-size: 20px;
}

.site-footer {
  background: #101b16;
  color: #dce4df;
}

@keyframes hero-background-drift {
  from { background-position: 48% 50%; }
  to { background-position: 52% 48%; }
}

@keyframes product-background-drift {
  from { background-position: 48% 52%; }
  to { background-position: 52% 48%; }
}

@keyframes paper-float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -14px; }
}

@keyframes scroll-cue-float {
  0%, 100% { translate: -50% 0; }
  50% { translate: -50% -5px; }
}

@keyframes screen-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.footer-inner {
  width: min(var(--max), calc(100% - 40px));
  min-height: 190px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
  padding: 42px 0;
}

.footer-brand {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 28px;
}

.footer-meta {
  margin: 10px 0 0;
  color: #aebcb5;
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px 22px;
}

.footer-links a {
  color: #dce4df;
  text-decoration: none;
  font-size: 13px;
}

.footer-links a:hover {
  text-decoration: underline;
}

@media (max-width: 960px) {
  .hero-screen-left {
    left: -104px;
  }

  .hero-screen-right {
    right: -104px;
  }

  .hero-screen-back {
    display: none;
  }

  .screen-gallery {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }
}

@media (max-width: 720px) {
  .header-inner {
    width: min(100% - 28px, var(--max));
    min-height: auto;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding-top: 14px;
  }

  .header-left {
    width: 100%;
    justify-content: space-between;
  }

  .site-nav {
    width: 100%;
    gap: 20px;
    overflow-x: auto;
  }

  .site-nav a {
    padding: 8px 0 13px;
  }

  .hero {
    min-height: 650px;
  }

  .hero-inner {
    width: min(100% - 32px, 620px);
    justify-content: flex-start;
    padding-top: 82px;
  }

  .hero-screen {
    width: 142px;
    border-width: 5px;
    border-radius: 18px;
    opacity: 0.96;
  }

  .floating-piece-three {
    display: none;
  }

  .hero-screen-left {
    left: -38px;
    top: auto;
    bottom: -122px;
  }

  .hero-screen-right {
    right: -38px;
    top: auto;
    bottom: -118px;
  }

  .section {
    padding: 72px 0;
  }

  .principle-list,
  .trust-list {
    grid-template-columns: 1fr;
  }

  .principle-list {
    margin-top: 44px;
  }

  .principle,
  .principle + .principle {
    min-height: auto;
    padding: 24px 0 26px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .principle h3 {
    margin-top: 20px;
  }

  .trust-list {
    gap: 38px;
  }

  .legal-hero {
    padding: 68px 0 50px;
  }

  .legal-content {
    padding: 54px 0 82px;
  }

  .legal-content section {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 28px 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .wordmark {
    font-size: 13px;
  }

  .site-nav {
    gap: 17px;
  }

  .site-nav a {
    font-size: 13px;
  }

  .site-nav a:last-child {
    display: none;
  }

  .hero {
    min-height: 620px;
  }

  .hero h1 {
    font-size: 64px;
  }

  .hero-lede {
    font-size: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .screen-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .screen-item img {
    border-width: 4px;
    border-radius: 14px;
  }

  .phone-ui {
    border-width: 4px;
    border-radius: 14px;
  }

  .screen-item figcaption {
    font-size: 11px;
  }
}

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

  .hero,
  .product-band,
  .floating-piece,
  .scroll-cue,
  .screen-item img,
  .phone-ui {
    animation: none;
  }
}