:root {
      color-scheme: light;
      --bg: #f7fbff;
      --surface: rgba(255, 255, 255, .76);
      --surface-strong: rgba(255, 255, 255, .94);
      --text: #14345a;
      --text-strong: #0e2c50;
      --muted: #6f839d;
      --dim: #91a2b8;
      --blue: #2c6fda;
      --blue-deep: #2059b7;
      --blue-soft: #dcecff;
      --line: rgba(65, 117, 181, .19);
      --line-strong: rgba(46, 105, 178, .34);
      --safe-top: max(22px, env(safe-area-inset-top));
      --safe-bottom: max(22px, env(safe-area-inset-bottom));
      --ease-out: cubic-bezier(.16, 1, .3, 1);
    }

    * { box-sizing: border-box; }
    html, body { width: 100%; min-height: 100%; }
    html { background: var(--bg); }
    body {
      margin: 0;
      min-height: 100svh;
      overflow: hidden;
      background: var(--bg);
      color: var(--text);
      font-family: Inter, "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont,
        "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      text-rendering: geometricPrecision;
    }

    button, input { font: inherit; }
    button { border: 0; }

    .app {
      position: relative;
      isolation: isolate;
      min-height: 100svh;
      overflow: hidden;
      background:
        radial-gradient(58% 43% at 50% 43%, rgba(255,255,255,.92), rgba(255,255,255,.54) 48%, rgba(240,247,255,.22) 100%);
    }

    #ether {
      position: absolute;
      inset: -2px;
      z-index: -5;
      width: calc(100% + 4px);
      height: calc(100% + 4px);
      display: block;
      opacity: .96;
      background:
        radial-gradient(80% 62% at 10% 90%, rgba(76, 142, 231, .24), transparent 66%),
        radial-gradient(68% 48% at 92% 10%, rgba(136, 187, 250, .24), transparent 72%),
        #f8fbff;
    }

    .atmosphere,
    .grain,
    .focus-halo {
      position: absolute;
      inset: 0;
      pointer-events: none;
    }

    .atmosphere {
      z-index: -4;
      background:
        radial-gradient(50% 42% at 50% 43%, rgba(255,255,255,.92) 0%, rgba(255,255,255,.74) 34%, rgba(255,255,255,.24) 72%, transparent 100%),
        linear-gradient(180deg, rgba(255,255,255,.36), transparent 24%, transparent 76%, rgba(225,239,255,.22));
    }

    .focus-halo {
      z-index: -3;
      inset: 16% 10% 20%;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255,255,255,.86), rgba(255,255,255,.42) 58%, transparent 78%);
      filter: blur(30px);
    }

    .grain {
      z-index: 9;
      opacity: .038;
      mix-blend-mode: multiply;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.86' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
    }

    .stream {
      position: absolute;
      z-index: -2;
      pointer-events: none;
      fill: none;
      overflow: visible;
      filter: drop-shadow(0 6px 16px rgba(67, 123, 202, .12));
    }

    .stream--a {
      width: min(124vw, 1240px);
      height: 300px;
      left: -38vw;
      top: 7vh;
      opacity: .5;
      transform: rotate(-8deg);
      animation: driftA 16s ease-in-out infinite alternate;
    }

    .stream--b {
      width: min(116vw, 1080px);
      height: 260px;
      right: -44vw;
      bottom: 4vh;
      opacity: .38;
      transform: rotate(11deg) scaleX(-1);
      animation: driftB 19s ease-in-out infinite alternate;
    }

    .stream path {
      stroke: rgba(74, 134, 214, .38);
      stroke-width: .8;
      vector-effect: non-scaling-stroke;
      stroke-linecap: round;
      stroke-dasharray: 980;
      stroke-dashoffset: 980;
      animation: trace 3.2s .4s var(--ease-out) forwards;
    }
    .stream path:nth-child(2) { opacity: .48; animation-delay: .58s; }
    .stream path:nth-child(3) { opacity: .25; animation-delay: .74s; }

    .topbar {
      position: absolute;
      z-index: 3;
      top: var(--safe-top);
      left: clamp(20px, 5vw, 56px);
      right: clamp(20px, 5vw, 56px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      opacity: 0;
      animation: reveal .8s .35s var(--ease-out) forwards;
    }

    .mini-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: rgba(30, 76, 132, .74);
      font-size: 10px;
      font-weight: 670;
      letter-spacing: .24em;
      text-transform: uppercase;
    }

    .mini-brand svg { width: 23px; height: 13px; overflow: visible; }
    .mini-brand path {
      fill: none;
      stroke: currentColor;
      stroke-width: 1.35;
      stroke-linecap: round;
    }

    .status {
      display: flex;
      align-items: center;
      gap: 9px;
      color: rgba(54, 91, 136, .48);
      font-size: 9px;
      font-weight: 620;
      letter-spacing: .17em;
      text-transform: uppercase;
    }

    .status-dot {
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: #3f82e4;
      box-shadow: 0 0 0 4px rgba(63, 130, 228, .10), 0 0 14px rgba(63, 130, 228, .36);
      animation: statusPulse 2.6s ease-in-out infinite;
    }

    .stage {
      position: relative;
      z-index: 2;
      min-height: 100svh;
      display: grid;
      grid-template-rows: 1fr auto;
      align-items: center;
      padding:
        calc(var(--safe-top) + 64px)
        clamp(20px, 5vw, 56px)
        var(--safe-bottom);
    }

    .hero {
      width: min(100%, 760px);
      justify-self: center;
      display: grid;
      justify-items: center;
      text-align: center;
      transform: translateY(-1.5vh);
    }

    .wind-mark {
      width: clamp(82px, 12vw, 116px);
      height: auto;
      margin-bottom: clamp(32px, 5.5vh, 56px);
      overflow: visible;
      color: var(--blue);
      filter: drop-shadow(0 12px 24px rgba(48, 112, 204, .15));
      opacity: 0;
      transform: translateY(10px) scale(.96);
      animation: markIn 1.05s .16s var(--ease-out) forwards, markFloat 6s 1.25s ease-in-out infinite;
    }

    .wind-mark path {
      fill: none;
      stroke: currentColor;
      stroke-linecap: round;
      stroke-linejoin: round;
      vector-effect: non-scaling-stroke;
      stroke-dasharray: 220;
      stroke-dashoffset: 220;
      animation: drawMark 1.65s .3s var(--ease-out) forwards;
    }
    .wind-mark path:nth-child(1) { stroke-width: 1.7; }
    .wind-mark path:nth-child(2) { stroke-width: 1.2; opacity: .66; animation-delay: .44s; }
    .wind-mark path:nth-child(3) { stroke-width: .95; opacity: .34; animation-delay: .58s; }

    h1 {
      margin: 0;
      display: grid;
      gap: 3px;
      font-weight: 420;
      letter-spacing: -.048em;
      line-height: .92;
      opacity: 0;
      filter: blur(8px);
      transform: translateY(14px);
      animation: titleIn 1.05s .58s var(--ease-out) forwards;
    }

    h1 .soft {
      color: #7890ae;
      font-size: clamp(26px, 6vw, 54px);
      font-weight: 340;
      letter-spacing: -.025em;
    }

    h1 .strong {
      color: var(--text-strong);
      font-size: clamp(52px, 12vw, 112px);
      font-weight: 560;
      letter-spacing: -.065em;
      text-shadow: 0 14px 44px rgba(35, 89, 153, .10);
    }

    .actions {
      width: min(100%, 430px);
      justify-self: center;
      display: grid;
      gap: 10px;
      opacity: 0;
      transform: translateY(16px);
      animation: actionsIn .85s .92s var(--ease-out) forwards;
    }

    .action {
      position: relative;
      width: 100%;
      min-height: 58px;
      border-radius: 16px;
      display: grid;
      grid-template-columns: 28px 1fr 28px;
      align-items: center;
      padding: 0 18px;
      cursor: pointer;
      -webkit-tap-highlight-color: transparent;
      transition:
        transform .22s var(--ease-out),
        border-color .22s ease,
        background .22s ease,
        color .22s ease,
        box-shadow .22s ease;
    }

    .action:active { transform: scale(.985); }
    .action:focus-visible { outline: 3px solid rgba(55, 126, 226, .22); outline-offset: 3px; }

    .action svg {
      width: 19px;
      height: 19px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.4;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .action__label {
      text-align: center;
      font-size: 13px;
      font-weight: 630;
      letter-spacing: .07em;
    }

    .action__arrow { justify-self: end; transition: transform .22s var(--ease-out); }
    .action:hover .action__arrow { transform: translateX(3px); }

    .action--primary {
      color: #fff;
      background: linear-gradient(135deg, #2e73de 0%, #245fbe 100%);
      box-shadow:
        0 18px 42px rgba(33, 94, 178, .22),
        inset 0 1px 0 rgba(255, 255, 255, .26);
    }
    .action--primary:hover {
      background: linear-gradient(135deg, #367fea 0%, #2867c9 100%);
      box-shadow:
        0 22px 52px rgba(33, 94, 178, .28),
        inset 0 1px 0 rgba(255, 255, 255, .34);
    }

    .action--secondary {
      color: #244b79;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, .68);
      box-shadow: 0 12px 28px rgba(47, 95, 155, .08), inset 0 1px 0 rgba(255,255,255,.86);
      backdrop-filter: blur(16px) saturate(115%);
      -webkit-backdrop-filter: blur(16px) saturate(115%);
    }
    .action--secondary:hover {
      color: #173b68;
      border-color: var(--line-strong);
      background: rgba(255, 255, 255, .88);
      box-shadow: 0 16px 34px rgba(47, 95, 155, .12), inset 0 1px 0 rgba(255,255,255,.96);
    }

    .trial-note {
      margin: 8px 0 0;
      text-align: center;
      color: #8193aa;
      font-size: 10px;
      line-height: 1.55;
      letter-spacing: .035em;
    }

    .sheet-backdrop {
      position: fixed;
      z-index: 20;
      inset: 0;
      display: grid;
      align-items: end;
      background: rgba(32, 67, 107, .18);
      backdrop-filter: blur(14px) saturate(105%);
      -webkit-backdrop-filter: blur(14px) saturate(105%);
      opacity: 0;
      visibility: hidden;
      transition: opacity .28s ease, visibility .28s ease;
    }

    .sheet-backdrop.is-open { opacity: 1; visibility: visible; }

    .sheet {
      width: 100%;
      border-top: 1px solid rgba(66, 117, 180, .18);
      border-radius: 24px 24px 0 0;
      padding: 12px 20px calc(22px + env(safe-area-inset-bottom));
      background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,255,.99));
      box-shadow: 0 -28px 80px rgba(42, 79, 125, .16);
      transform: translateY(105%);
      transition: transform .46s var(--ease-out);
    }

    .sheet-backdrop.is-open .sheet { transform: translateY(0); }

    .handle {
      width: 36px;
      height: 4px;
      margin: 0 auto 26px;
      border-radius: 999px;
      background: rgba(48, 91, 143, .18);
    }

    .sheet__inner { width: min(100%, 430px); margin: 0 auto; }
    .sheet__head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 24px;
    }

    .sheet h2 {
      margin: 0;
      color: #12335a;
      font-size: 24px;
      font-weight: 590;
      letter-spacing: -.035em;
    }

    .sheet p {
      margin: 10px 0 0;
      color: #75879e;
      font-size: 12px;
      line-height: 1.7;
    }

    .close {
      flex: 0 0 auto;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      cursor: pointer;
      color: #6e829c;
      background: #eef5fd;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }
    .close:hover { color: #174376; background: #e4effc; }
    .close:active { transform: scale(.94); }
    .close svg { width: 15px; height: 15px; stroke: currentColor; stroke-width: 1.5; }

    .code-field {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 9px;
      margin-top: 28px;
    }

    .code-input {
      width: 100%;
      min-width: 0;
      height: 54px;
      border: 1px solid rgba(65, 116, 180, .20);
      border-radius: 13px;
      padding: 0 16px;
      background: #f7fbff;
      color: #13355d;
      font-size: 14px;
      font-weight: 580;
      letter-spacing: .1em;
      text-transform: uppercase;
      outline: none;
      transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .code-input::placeholder { color: #9aaac0; text-transform: none; letter-spacing: .03em; }
    .code-input:focus {
      border-color: rgba(44, 111, 218, .54);
      background: #fff;
      box-shadow: 0 0 0 4px rgba(44, 111, 218, .10);
    }

    .verify {
      height: 54px;
      min-width: 92px;
      border-radius: 13px;
      padding: 0 18px;
      cursor: pointer;
      color: #fff;
      background: linear-gradient(135deg, #2e73de, #245fbe);
      box-shadow: 0 10px 24px rgba(33, 94, 178, .18);
      font-size: 12px;
      font-weight: 680;
      letter-spacing: .06em;
      transition: transform .18s ease, filter .18s ease;
    }
    .verify:hover { filter: brightness(1.045); }
    .verify:active { transform: scale(.97); }

    .field-message {
      min-height: 18px;
      margin: 9px 4px 0;
      color: #c65367;
      font-size: 10px;
      line-height: 1.5;
    }

    .transition-screen {
      position: fixed;
      z-index: 40;
      inset: 0;
      display: grid;
      place-items: center;
      background:
        radial-gradient(circle at 50% 46%, #fff 0%, #f7fbff 52%, #edf5ff 100%);
      opacity: 0;
      visibility: hidden;
      transition: opacity .42s ease, visibility .42s ease;
    }
    .transition-screen.is-visible { opacity: 1; visibility: visible; }

    .transition__inner {
      display: grid;
      justify-items: center;
      gap: 24px;
      transform: translateY(-2vh);
    }

    .transition__inner .wind-mark {
      width: 76px;
      margin: 0;
      opacity: 1;
      transform: none;
      animation: markFloat 4s ease-in-out infinite;
    }

    .transition__label {
      color: #657f9f;
      font-size: 11px;
      letter-spacing: .18em;
    }

    .loading-line {
      width: 120px;
      height: 2px;
      overflow: hidden;
      border-radius: 999px;
      background: #dce9f8;
    }
    .loading-line::after {
      content: "";
      display: block;
      width: 42%;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, #78aaf0, #2f72d9);
      animation: load 1.15s var(--ease-out) infinite;
    }

    @media (min-width: 720px) {
      .stage {
        grid-template-rows: 1fr auto;
        padding-bottom: max(34px, env(safe-area-inset-bottom));
      }
      .actions { width: 400px; }
      .sheet-backdrop { place-items: center; padding: 24px; }
      .sheet {
        width: min(100%, 486px);
        border: 1px solid rgba(66, 117, 180, .17);
        border-radius: 22px;
        padding: 12px 28px 28px;
        transform: translateY(18px) scale(.97);
        opacity: 0;
      }
      .sheet-backdrop.is-open .sheet { transform: translateY(0) scale(1); opacity: 1; }
      .hero { transform: translateY(-3vh); }
    }

    @media (max-height: 690px) {
      .wind-mark { margin-bottom: 22px; width: 70px; }
      .stage { padding-top: calc(var(--safe-top) + 52px); }
      .hero { transform: translateY(0); }
      .action { min-height: 52px; }
      .trial-note { display: none; }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
      }
      #ether { opacity: .76; }
    }

    @keyframes reveal { to { opacity: 1; } }
    @keyframes titleIn { to { opacity: 1; filter: blur(0); transform: translateY(0); } }
    @keyframes actionsIn { to { opacity: 1; transform: translateY(0); } }
    @keyframes markIn { to { opacity: 1; transform: translateY(0) scale(1); } }
    @keyframes drawMark { to { stroke-dashoffset: 0; } }
    @keyframes trace { to { stroke-dashoffset: 0; } }
    @keyframes markFloat {
      0%, 100% { transform: translateY(0) rotate(-.7deg); }
      50% { transform: translateY(-5px) rotate(.7deg); }
    }
    @keyframes driftA {
      from { translate: -1.5% 0; scale: 1; }
      to { translate: 3% 2%; scale: 1.035; }
    }
    @keyframes driftB {
      from { translate: 1% 0; scale: 1; }
      to { translate: -3% -2%; scale: 1.04; }
    }
    @keyframes statusPulse {
      0%, 100% { opacity: .56; transform: scale(.9); }
      50% { opacity: 1; transform: scale(1.08); }
    }
    @keyframes load {
      from { transform: translateX(-120%); }
      to { transform: translateX(340%); }
    }