@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/inter-latin-400.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/inter-latin-500.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/inter-latin-600.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/inter-latin-700.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("../fonts/inter-latin-800.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/noto-sans-sc-400.woff2") format("woff2");
  unicode-range: U+2E80-2EFF, U+2F00-2FDF, U+3000-303F, U+3100-312F, U+31A0-31BF, U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F, U+FF00-FFEF;
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/noto-sans-sc-500.woff2") format("woff2");
  unicode-range: U+2E80-2EFF, U+2F00-2FDF, U+3000-303F, U+3100-312F, U+31A0-31BF, U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F, U+FF00-FFEF;
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/noto-sans-sc-700.woff2") format("woff2");
  unicode-range: U+2E80-2EFF, U+2F00-2FDF, U+3000-303F, U+3100-312F, U+31A0-31BF, U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F, U+FF00-FFEF;
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/noto-sans-sc-700.woff2") format("woff2");
  unicode-range: U+2E80-2EFF, U+2F00-2FDF, U+3000-303F, U+3100-312F, U+31A0-31BF, U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F, U+FF00-FFEF;
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("../fonts/noto-sans-sc-700.woff2") format("woff2");
  unicode-range: U+2E80-2EFF, U+2F00-2FDF, U+3000-303F, U+3100-312F, U+31A0-31BF, U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F, U+FF00-FFEF;
}

:root {
  --bg: #000;
  --bg-elevated: #0d0d0d;
  --card: #111;
  --card-hover: #1a1a1a;
  --line: #222;
  --line-2: #333;
  --text: #fff;
  --muted: #8c8c8c;
  --muted-2: #5c5c5c;
  --green: #2ebd85;
  --red: #f6465d;
  --header-h: 64px;
  --max: 1200px;
  --radius: 16px;
  --shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

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

button,
input {
  font-family: inherit;
}

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  width: 72px;
  height: 24px;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  white-space: nowrap;
}

.nav-link:hover,
.nav-item:hover > .nav-link {
  background: var(--card);
}

.nav-link svg {
  width: 12px;
  height: 12px;
  opacity: 0.65;
}

.dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 248px;
  background: #111;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  padding: 8px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: 0.16s ease;
}

.dropdown-wide {
  min-width: 280px;
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.dropdown a {
  display: flex;
  padding: 10px 12px;
  border-radius: 8px;
}

.dropdown a:hover {
  background: #1c1c1c;
}

.dropdown-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.dropdown-desc {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
}

.icon-btn:hover {
  background: var(--card);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--text);
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

.lang-btn:hover {
  background: var(--card);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--card);
}

.btn-solid {
  background: #fff;
  color: #000;
}

.btn-solid:hover {
  background: #e8e8e8;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid #fff;
}

.btn-outline:hover {
  background: #fff;
  color: #000;
}

.btn-lg {
  height: 48px;
  padding: 0 24px;
  font-size: 16px;
}

.btn-mini {
  height: 32px;
  padding: 0 14px;
  font-size: 13px;
  background: #fff;
  color: #000;
}

.btn-mini:hover {
  background: #e8e8e8;
}

.hamburger {
  display: none;
  width: 36px;
  height: 36px;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  border-radius: 8px;
}

.hamburger:hover {
  background: var(--card);
}

.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: #000;
  z-index: 90;
  padding: 16px 20px 40px;
  overflow-y: auto;
  display: none;
}

.mobile-nav.open {
  display: block;
}

body.menu-open {
  overflow: hidden;
}

.mobile-nav a {
  display: flex;
  width: 100%;
  padding: 14px 8px;
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}

.mobile-cta {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.mobile-cta .btn {
  flex: 1;
  height: 44px;
}

.mobile-cta .btn-ghost {
  border: 1px solid var(--line-2);
}

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
}

.search-overlay.open {
  display: flex;
}

.search-box {
  width: min(560px, calc(100% - 32px));
  background: #111;
  border: 1px solid var(--line-2);
  border-radius: 16px;
  padding: 16px;
}

.search-box input {
  width: 100%;
  height: 48px;
  border: 1px solid var(--line-2);
  background: #000;
  color: var(--text);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 16px;
  outline: none;
}

.search-box input:focus {
  border-color: #fff;
}

.search-hint {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

/* Hero */
.hero {
  padding: 88px 0 40px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-kicker {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 18px;
}

.hero-copy h1 {
  font-size: clamp(40px, 5.4vw, 68px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.hero-sub {
  margin-top: 22px;
  font-size: 18px;
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  display: grid;
  place-items: center;
  min-height: 360px;
}

.hero-visual .download-preview {
  margin-left: auto;
  margin-right: auto;
}

.okx-stage {
  width: 280px;
  height: 220px;
  position: relative;
  transform-style: preserve-3d;
}

.okx-spin {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transform-style: preserve-3d;
  animation: spin-okx 14s linear infinite;
}

.okx-solid {
  position: relative;
  width: 260px;
  height: 110px;
  transform-style: preserve-3d;
}

.okx-slice {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 88px;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  user-select: none;
}

.okx-slice:not(.okx-slice-front):not(.okx-slice-back) {
  backface-visibility: visible;
}

.okx-slice:nth-child(1) {
  transform: translateZ(-36px);
  color: #050505;
}

.okx-slice:nth-child(2) {
  transform: translateZ(-33px);
  color: #0a0a0a;
}

.okx-slice:nth-child(3) {
  transform: translateZ(-30px);
  color: #101010;
}

.okx-slice:nth-child(4) {
  transform: translateZ(-27px);
  color: #161616;
}

.okx-slice:nth-child(5) {
  transform: translateZ(-24px);
  color: #1c1c1c;
}

.okx-slice:nth-child(6) {
  transform: translateZ(-21px);
  color: #242424;
}

.okx-slice:nth-child(7) {
  transform: translateZ(-18px);
  color: #2c2c2c;
}

.okx-slice:nth-child(8) {
  transform: translateZ(-15px);
  color: #363636;
}

.okx-slice:nth-child(9) {
  transform: translateZ(-12px);
  color: #444;
}

.okx-slice:nth-child(10) {
  transform: translateZ(-9px);
  color: #555;
}

.okx-slice:nth-child(11) {
  transform: translateZ(-6px);
  color: #777;
}

.okx-slice:nth-child(12) {
  transform: translateZ(-3px);
  color: #aaa;
}

.okx-slice-front {
  transform: translateZ(0);
  color: #fff;
  text-shadow: 0 0 48px rgba(255, 255, 255, 0.12);
  backface-visibility: hidden;
}

.okx-slice-back {
  transform: translateZ(-36px) rotateY(180deg);
  color: #f0f0f0;
  text-shadow: 0 0 40px rgba(255, 255, 255, 0.08);
  backface-visibility: hidden;
}

@keyframes spin-okx {
  from {
    transform: rotateX(-14deg) rotateY(24deg);
  }
  to {
    transform: rotateX(-14deg) rotateY(384deg);
  }
}

/* Sections */
.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--bg-elevated);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 36px;
}

.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.section-sub {
  color: var(--muted);
  margin-top: 10px;
  font-size: 16px;
  max-width: 640px;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.text-link:hover {
  color: #fff;
}

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

.trust-card,
.product-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  transition: 0.18s ease;
}

.product-card:hover,
.trust-card:hover {
  background: var(--card-hover);
  border-color: #3a3a3a;
  transform: translateY(-2px);
}

.trust-icon,
.product-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  display: grid;
  place-items: center;
  color: #fff;
}

.trust-icon svg,
.product-icon svg {
  width: 22px;
  height: 22px;
}

.trust-card h3,
.product-card h3 {
  margin-top: 18px;
  font-size: 18px;
}

.trust-card p,
.product-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  flex: 1;
}

.product-link {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
}

.product-link::after {
  content: " →";
}

/* Markets */
.table-wrap {
  overflow-x: auto;
}

.markets-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.markets-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.markets-table th:nth-child(n + 2) {
  text-align: right;
}

.markets-table td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.markets-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.markets-table td:nth-child(n + 2) {
  text-align: right;
}

.asset {
  display: flex;
  align-items: center;
  gap: 12px;
}

.asset > span:last-child {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.coin-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.coin-symbol {
  font-size: 12px;
  color: var(--muted);
}

.up {
  color: var(--green);
}

.down {
  color: var(--red);
}

/* Stats */
.stats-section {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.06), transparent 50%),
    #000;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.stat-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.stat-card strong {
  display: block;
  font-size: 36px;
  letter-spacing: -0.04em;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

/* Download */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.download-copy h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.035em;
}

.download-copy p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
  max-width: 460px;
}

.download-actions {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}


.store-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #111;
  border: 1px solid var(--line-2);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 16px;
  min-width: 180px;
  cursor: pointer;
}

.store-btn:hover {
  background: #1a1a1a;
}

.store-btn small {
  display: block;
  font-size: 11px;
  color: var(--muted);
}

.store-btn strong {
  font-size: 14px;
}

.download-visual {
  display: grid;
  place-items: center;
  min-height: 280px;
  perspective: 900px;
}

.download-preview {
  width: min(280px, 100%);
  margin-left: auto;
  background: #0a0a0a;
  border: 8px solid #2a2a2a;
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow);
  line-height: 0;
}

.download-video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 480 / 1000;
  object-fit: cover;
  background: #000;
}

/* FAQ */
.faq-wrap {
  max-width: 800px;
}

.faq-list {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

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

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 0;
  font-size: 18px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

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

.faq-item summary::after {
  content: "+";
  font-weight: 400;
  color: var(--muted);
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item p {
  padding: 0 0 22px;
  color: var(--muted);
  font-size: 15px;
  max-width: 680px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(5, 1fr);
  gap: 32px;
}

.footer h4 {
  font-size: 14px;
  margin-bottom: 16px;
}

.footer a {
  display: block;
  font-size: 13px;
  color: var(--muted);
  padding: 5px 0;
}

.footer a:hover {
  color: #fff;
}

.socials {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.socials a {
  width: 32px;
  height: 32px;
  padding: 0;
  display: grid;
  place-items: center;
  background: #111;
  border-radius: 50%;
  color: var(--text);
}

.socials a:hover {
  background: #1f1f1f;
}

.socials svg {
  width: 14px;
  height: 14px;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  font-size: 13px;
  color: var(--muted);
}

.footer-bottom span:last-child {
  max-width: 640px;
  text-align: right;
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .hero-grid,
  .download-grid,
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .download-preview {
    margin: 0 auto;
  }

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

  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 860px) {
  .nav,
  .lang-btn,
  .header-actions .icon-btn:not([data-search]),
  .header-actions .btn-ghost,
  .header-actions .btn-solid {
    display: none;
  }

  .hamburger {
    display: grid;
    place-items: center;
  }

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

  .hero {
    padding: 48px 0 24px;
  }

  .hero-visual {
    min-height: 260px;
  }

  .section {
    padding: 56px 0;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .trust-grid,
  .products-grid,
  .stat-cards,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .footer-bottom span:last-child {
    text-align: left;
  }

  .hero-actions .btn {
    width: 100%;
  }
}