/* Two editions on one site (2026-10-19).
 *
 * - The edition switcher in a page header (futures.html, stocks.html).
 * - The chooser page at the site root (index.html): pick 外汇期货版 or 股票版
 *   on a split screen.
 *
 * The chooser and the stocks page are dark only for now; the futures pages
 * keep their light theme through theme.css. */

/* ── Edition switcher ──────────────────────────────────────────────────── */

.edition-switch {
  position: relative;
  flex: 0 0 auto;
}

.edition-switch-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 9px 0 11px;
  border: 0;
  border-radius: 9px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.edition-switch-button svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 200ms ease;
}

.edition-switch-button[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.edition-switch-button:focus-visible {
  outline: 2px solid #6597ff;
  outline-offset: 3px;
}

.edition-switch-button.is-futures {
  color: #a9c3ff;
  background: rgba(75, 131, 247, 0.15);
  box-shadow: inset 0 0 0 1px rgba(75, 131, 247, 0.32);
}

.edition-switch-button.is-futures:hover {
  background: rgba(75, 131, 247, 0.24);
}

.edition-switch-button.is-stocks {
  color: #ff9c94;
  background: rgba(229, 72, 77, 0.13);
  box-shadow: inset 0 0 0 1px rgba(229, 72, 77, 0.3);
}

.edition-switch-button.is-stocks:hover {
  background: rgba(229, 72, 77, 0.2);
}

html[data-theme="light"] .edition-switch-button.is-futures {
  color: #1f5fce;
  background: rgba(47, 111, 237, 0.1);
  box-shadow: inset 0 0 0 1px rgba(47, 111, 237, 0.28);
}

.edition-menu {
  position: absolute;
  z-index: 200;
  top: calc(100% + 10px);
  left: 0;
  display: flex;
  width: 296px;
  flex-direction: column;
  gap: 2px;
  padding: 6px;
  border-radius: 14px;
  background: linear-gradient(180deg, #172235, #101928);
  box-shadow:
    0 0 0 1px rgba(174, 195, 232, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 30px 80px -20px rgba(0, 0, 0, 0.85);
}

.edition-menu[hidden] {
  display: none;
}

.edition-menu.is-stocks {
  background: linear-gradient(180deg, #1b1c20, #16171a);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.09),
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 30px 80px -20px rgba(0, 0, 0, 0.85);
}

html[data-theme="light"] .edition-menu:not(.is-stocks) {
  background: #ffffff;
  box-shadow:
    0 0 0 1px rgba(35, 57, 88, 0.14),
    0 24px 60px -20px rgba(15, 30, 60, 0.35);
}

.edition-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 9px;
  color: #d6dde9;
  text-decoration: none;
}

.edition-menu a:hover,
.edition-menu a:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  outline: none;
}

.edition-menu a.is-current {
  background: rgba(123, 133, 244, 0.13);
}

.edition-menu:not(.is-stocks) a.is-current {
  background: rgba(75, 131, 247, 0.15);
}

.edition-menu strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.edition-menu small {
  display: block;
  margin-top: 2px;
  color: #8592a6;
  font-size: 12px;
}

.edition-menu .edition-check {
  width: 16px;
  height: 16px;
  margin-left: auto;
  fill: none;
  stroke: #8db1ff;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.edition-menu.is-stocks .edition-check {
  stroke: #a3abff;
}

html[data-theme="light"] .edition-menu:not(.is-stocks) a {
  color: #24344d;
}

html[data-theme="light"] .edition-menu:not(.is-stocks) a:hover {
  background: rgba(35, 57, 88, 0.06);
  color: #0b1728;
}

html[data-theme="light"] .edition-menu:not(.is-stocks) small {
  color: #66758a;
}

.edition-menu-sep {
  height: 1px;
  margin: 4px 8px;
  background: rgba(160, 180, 214, 0.14);
}

@media (max-width: 560px) {
  .edition-menu {
    width: min(296px, calc(100vw - 40px));
  }
}

/* ── Chooser page: split screen ────────────────────────────────────────────
 *
 * The page is one grid (.split). Both halves (.split-side) cover the whole
 * grid and are cut along one diagonal by clip-path; --split-top and
 * --split-bottom are where that diagonal meets the top and bottom edges.
 * Hovering a half, or focusing its button, moves the diagonal towards the
 * other side. Each half is a link, so the whole coloured area is clickable;
 * the copy above it lets clicks through except on its own links.
 *
 * Phones stack the halves: 外汇期货版 on top, 股票版 below, with a short
 * diagonal between them. */

.chooser-page {
  --ch-ink: #f4f7fc;
  --ch-ink-soft: #d6dde9;
  --ch-body: #a7b2c3;
  --ch-muted: #8592a6;
  --ch-futures-soft: #8db1ff;
  --ch-stocks: #7b85f4;
  --ch-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  margin: 0;
  background: #05070c;
  color: var(--ch-ink-soft);
  font-family: "Manrope", "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.chooser-page a {
  color: inherit;
  text-decoration: none;
}

.split {
  --split-top: 56%;
  --split-bottom: 44%;
  --split-gutter: max(48px, 6vw);
  position: relative;
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto auto 1fr auto;
  grid-template-areas:
    "head head"
    "title title"
    "futures stocks"
    "foot foot";
  overflow: hidden;
  isolation: isolate;
}

.split-main {
  display: contents;
}

/* Halves */

.split-side {
  position: absolute;
  z-index: 0;
  grid-area: 1 / 1 / -1 / -1;
  inset: 0;
  display: block;
  transition:
    clip-path 800ms var(--ch-ease),
    filter 600ms ease;
}

.split-side canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.split-side.is-futures {
  background:
    radial-gradient(80% 70% at 18% 45%, rgba(46, 98, 214, 0.32), transparent 70%),
    linear-gradient(160deg, #0a1322, #060a12);
  clip-path: polygon(0 0, var(--split-top) 0, var(--split-bottom) 100%, 0 100%);
  animation: split-wipe-futures 1100ms var(--ch-ease) backwards;
}

.split-side.is-stocks {
  background:
    radial-gradient(80% 70% at 82% 45%, rgba(123, 98, 214, 0.26), transparent 70%),
    radial-gradient(60% 50% at 80% 92%, rgba(229, 72, 77, 0.14), transparent 70%),
    linear-gradient(200deg, #141519, #0a0b0d);
  clip-path: polygon(var(--split-top) 0, 100% 0, 100% 100%, var(--split-bottom) 100%);
  animation: split-wipe-stocks 1100ms var(--ch-ease) backwards;
}

/* The candle tape fades out under each half's copy so the words stay clear. */
.split-side.is-futures canvas {
  -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.18) 32%, #000 50%);
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.18) 32%, #000 50%);
}

.split-side.is-stocks canvas {
  -webkit-mask-image: linear-gradient(270deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.18) 32%, #000 50%);
  mask-image: linear-gradient(270deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.18) 32%, #000 50%);
}

.split-seam {
  position: absolute;
  z-index: 1;
  grid-area: 1 / 1 / -1 / -1;
  inset: 0;
  pointer-events: none;
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.45));
}

.split-seam::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0));
  clip-path: polygon(
    var(--split-top) 0,
    calc(var(--split-top) + 1.5px) 0,
    calc(var(--split-bottom) + 1.5px) 100%,
    var(--split-bottom) 100%
  );
  transition: clip-path 800ms var(--ch-ease);
}

/* Header, title and footer sit above both halves */

.split-header {
  position: relative;
  z-index: 3;
  display: flex;
  height: 74px;
  grid-area: head;
  align-items: center;
  gap: 14px;
  padding-inline: var(--split-gutter);
  pointer-events: none;
}

.split-header > * {
  pointer-events: auto;
}

.chooser-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ch-ink);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.chooser-brand img {
  width: auto;
  height: 30px;
}

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

.chooser-nav > a:not(.account-login-link) {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--ch-body);
  font-size: 13px;
  font-weight: 500;
}

.chooser-nav > a:not(.account-login-link):hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--ch-ink);
}

.chooser-nav .account-login-link {
  margin-left: 8px;
}

.split-title {
  position: relative;
  z-index: 2;
  display: flex;
  grid-area: title;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  justify-self: center;
  padding: 2px 20px 0;
  text-align: center;
  pointer-events: none;
  animation: split-rise 900ms var(--ch-ease) 450ms backwards;
}

.split-title h1 {
  margin: 0;
  color: var(--ch-ink);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.split-title p {
  margin: 0;
  color: var(--ch-muted);
  font-size: 13px;
}

.split-footer {
  position: relative;
  z-index: 3;
  display: flex;
  grid-area: foot;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  justify-self: center;
  padding: 24px 20px 26px;
  color: var(--ch-muted);
  font-size: 12.5px;
  pointer-events: none;
}

.split-footer a {
  pointer-events: auto;
}

.split-footer a:hover {
  color: var(--ch-ink-soft);
}

/* Copy */

.split-copy {
  position: relative;
  z-index: 2;
  display: flex;
  width: min(420px, 100%);
  flex-direction: column;
  align-self: center;
  gap: 14px;
  padding-block: 24px;
  pointer-events: none;
  transition:
    opacity 600ms ease,
    translate 800ms var(--ch-ease);
  animation: split-rise 900ms var(--ch-ease) backwards;
}

.split-copy a {
  pointer-events: auto;
}

.split-copy.is-futures {
  grid-area: futures;
  justify-self: start;
  margin-left: var(--split-gutter);
}

.split-copy.is-stocks {
  grid-area: stocks;
  align-items: flex-end;
  justify-self: end;
  margin-right: var(--split-gutter);
  text-align: right;
  animation-delay: 200ms;
}

.split-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--ch-muted);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

.split-copy.is-stocks .split-kicker {
  flex-direction: row-reverse;
}

.split-last {
  display: none;
  height: 22px;
  align-items: center;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--ch-ink);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0;
}

.split-copy.is-last .split-last {
  display: inline-flex;
}

.split-copy h2 {
  margin: 0;
  color: var(--ch-ink);
  font-size: clamp(44px, 4.6vw, 68px);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.split-lede {
  margin: 0;
  color: var(--ch-body);
  font-size: 16px;
  line-height: 1.7;
}

.split-facts {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin: 4px 0 8px;
  padding: 0;
  color: var(--ch-ink-soft);
  font-size: 14px;
  line-height: 1.5;
  list-style: none;
}

.split-copy.is-stocks .split-facts {
  align-items: flex-end;
}

.split-facts li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.split-copy.is-stocks .split-facts li {
  flex-direction: row-reverse;
}

.split-facts li::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
}

.split-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}

.split-copy.is-stocks .split-actions {
  flex-direction: row-reverse;
}

.split-go {
  display: inline-flex;
  height: 44px;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border-radius: 12px;
  color: #fff;
  font-size: 14.5px;
  font-weight: 650;
  transition:
    transform 160ms ease,
    box-shadow 240ms ease;
}

.split-go svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 240ms ease;
}

.split-go:hover {
  transform: translateY(-1px);
}

.split-go:hover svg {
  transform: translateX(4px);
}

.split-go:focus-visible {
  outline: 2px solid var(--ch-futures-soft);
  outline-offset: 3px;
}

.split-go.is-futures {
  background: linear-gradient(180deg, #5b8ef8, #3a6fe0);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 10px 30px -10px rgba(75, 131, 247, 0.8);
}

.split-go.is-stocks {
  background: linear-gradient(180deg, #717bf0, #4f5ad6);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.24),
    0 10px 30px -10px rgba(108, 118, 236, 0.85);
}

.split-state {
  display: inline-flex;
  height: 24px;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 0 1px rgba(160, 180, 214, 0.15);
  color: var(--ch-ink-soft);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
}

.split-state i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.split-state i.is-live {
  background: #35c49a;
  box-shadow: 0 0 8px rgba(53, 196, 154, 0.8);
}

.split-state i.is-beta {
  background: var(--ch-stocks);
  box-shadow: 0 0 8px rgba(123, 133, 244, 0.9);
}

/* Hover: the chosen half widens, the other one fades back */

@media (hover: hover) and (min-width: 901px) {
  .split:has(.split-side.is-futures:hover, .split-go.is-futures:hover, .split-go.is-futures:focus-visible) {
    --split-top: 66%;
    --split-bottom: 54%;
  }

  .split:has(.split-side.is-stocks:hover, .split-go.is-stocks:hover, .split-go.is-stocks:focus-visible) {
    --split-top: 46%;
    --split-bottom: 34%;
  }

  .split:has(.split-side.is-futures:hover, .split-go.is-futures:hover, .split-go.is-futures:focus-visible) .split-side.is-stocks,
  .split:has(.split-side.is-stocks:hover, .split-go.is-stocks:hover, .split-go.is-stocks:focus-visible) .split-side.is-futures {
    filter: saturate(0.45) brightness(0.6);
  }

  .split:has(.split-side.is-futures:hover, .split-go.is-futures:hover, .split-go.is-futures:focus-visible) .split-copy.is-stocks,
  .split:has(.split-side.is-stocks:hover, .split-go.is-stocks:hover, .split-go.is-stocks:focus-visible) .split-copy.is-futures {
    opacity: 0.32;
  }

  .split:has(.split-side.is-futures:hover, .split-go.is-futures:hover, .split-go.is-futures:focus-visible) .split-copy.is-futures {
    translate: 2vw 0;
  }

  .split:has(.split-side.is-stocks:hover, .split-go.is-stocks:hover, .split-go.is-stocks:focus-visible) .split-copy.is-stocks {
    translate: -2vw 0;
  }
}

@keyframes split-wipe-futures {
  from {
    clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
  }
}

@keyframes split-wipe-stocks {
  from {
    clip-path: polygon(100% 0, 100% 0, 100% 100%, 100% 100%);
  }
}

@keyframes split-rise {
  from {
    opacity: 0;
    translate: 0 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .split-side,
  .split-seam::before,
  .split-title,
  .split-copy,
  .split-go,
  .split-go svg {
    animation: none;
    transition: none;
  }
}

@media (max-width: 1100px) and (min-width: 901px) {
  .split {
    --split-gutter: 40px;
  }

  .split-copy {
    width: min(360px, 100%);
  }

  .split-facts {
    font-size: 13.5px;
  }
}

@media (max-width: 900px) {
  .split {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto auto auto auto;
    grid-template-areas:
      "head"
      "title"
      "futures"
      "stocks"
      "foot";
  }

  /* Each half covers its own rows and reaches 28px past them, so the two
     clip paths meet on one diagonal between 外汇期货版 and 股票版. */
  .split-side.is-futures {
    grid-area: 1 / 1 / 4 / 2;
    inset: 0 0 -28px 0;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 56px), 0 100%);
  }

  .split-side.is-stocks {
    grid-area: 4 / 1 / 6 / 2;
    inset: -28px 0 0 0;
    clip-path: polygon(0 56px, 100% 0, 100% 100%, 0 100%);
  }

  .split-side canvas {
    opacity: 0.5;
  }

  .split-side.is-futures canvas,
  .split-side.is-stocks canvas {
    -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.25), #000 75%);
    mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.25), #000 75%);
  }

  .split-seam {
    display: none;
  }

  .split-header {
    height: 64px;
    padding-inline: 20px;
  }

  .chooser-nav > a:not(.account-login-link) {
    display: none;
  }

  .split-title {
    align-items: flex-start;
    justify-self: start;
    padding: 6px 20px 0;
    text-align: left;
  }

  .split-title h1 {
    font-size: 20px;
  }

  .split-copy.is-futures,
  .split-copy.is-stocks {
    width: auto;
    align-items: flex-start;
    justify-self: stretch;
    margin: 0;
    padding: 26px 20px 64px;
    text-align: left;
  }

  .split-copy.is-stocks {
    padding-top: 64px;
    padding-bottom: 20px;
  }

  .split-copy.is-stocks .split-kicker,
  .split-copy.is-stocks .split-actions,
  .split-copy.is-stocks .split-facts li {
    flex-direction: row;
  }

  .split-copy.is-stocks .split-facts {
    align-items: flex-start;
  }

  .split-copy h2 {
    font-size: 44px;
  }

  .split-footer {
    justify-content: flex-start;
    justify-self: start;
    gap: 8px 18px;
    padding: 18px 20px 28px;
  }
}