@font-face {
    font-family: "Bricolage";
    src: url("fonts/bricolage.woff2") format("woff2");
    font-weight: 200 800;
    font-display: swap;
}
@font-face {
    font-family: "DM Mono";
    src: url("fonts/dm-mono-400.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: "DM Mono";
    src: url("fonts/dm-mono-500.woff2") format("woff2");
    font-weight: 500;
    font-display: swap;
}

:root {
    --paper: #F2EFE6;
    --paper-2: #E8E4D8;
    --ink: #15130F;
    --ink-2: #5E5A50;
    --line: rgba(21, 19, 15, 0.16);
    --cyan: #00B3E6;
    --magenta: #FF2E7E;
    --yellow: #FFD400;
    --violet: #7A5CFF;
    --display: "Bricolage", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    --mono: "DM Mono", "PingFang SC", "Microsoft YaHei", ui-monospace, monospace;
    --gutter: clamp(16px, 3vw, 44px);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--display);
    font-size: 17px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3, h4, p, dl, dd, ol, ul { margin: 0; padding: 0; }
ol, ul { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
img, svg { display: block; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* The four plates */
[data-plate="0"] { --plate: var(--cyan); }
[data-plate="1"] { --plate: var(--magenta); }
[data-plate="2"] { --plate: var(--yellow); }
[data-plate="3"] { --plate: var(--violet); }

.plate {
    position: absolute;
    display: block;
    border-radius: 50%;
    background: var(--plate);
    mix-blend-mode: multiply;
}

.mark { width: 26px; height: 26px; flex: none; overflow: visible; }
#mark circle { mix-blend-mode: multiply; }
.mark { isolation: isolate; }
.p0 { fill: var(--cyan); }
.p1 { fill: var(--magenta); }
.p2 { fill: var(--yellow); }
.p3 { fill: var(--violet); }

.brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 21px;
    letter-spacing: -0.03em;
}

.eyebrow {
    font-family: var(--mono);
    font-size: 12.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-2);
}

.section-title {
    font-size: clamp(2.2rem, 5.6vw, 5.4rem);
    line-height: 1;
    letter-spacing: -0.04em;
    font-weight: 650;
    max-width: 17ch;
    margin-top: 18px;
    text-wrap: balance;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    border: 1.5px solid transparent;
    font-weight: 600;
    font-size: 16px;
    white-space: nowrap;
    transition: background-color .2s, color .2s, border-color .2s, opacity .2s;
}
.btn-small { min-height: 40px; padding: 0 16px; font-size: 14.5px; }
.btn-large { min-height: 64px; padding: 0 40px; font-size: 20px; }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--magenta); color: var(--ink); }
.btn-paper { background: var(--paper); color: var(--ink); }
.btn-paper:hover { background: var(--yellow); }
.btn-line { border-color: currentColor; }
.btn-line:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn:disabled { opacity: .45; cursor: progress; }

/* Language switch */
.lang {
    display: inline-flex;
    padding: 3px;
    border-radius: 999px;
    border: 1.5px solid var(--line);
    font-family: var(--mono);
    font-size: 12.5px;
}
.lang button { min-height: 32px; min-width: 40px; padding: 0 9px; border-radius: 999px; color: var(--ink-2); }
.lang button:hover { color: var(--ink); }
.lang button.is-active { background: var(--ink); color: var(--paper); }

/* Nav */
.nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px var(--gutter);
    transition: background-color .25s, box-shadow .25s, transform .35s;
}
.nav.is-stuck { background: rgba(242, 239, 230, 0.88); backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--line); }
.nav.is-hidden { transform: translateY(-100%); }
.nav-links { display: flex; gap: 26px; font-size: 15.5px; font-weight: 500; }
.nav-links a { position: relative; padding: 6px 0; }
.nav-links a::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 2px;
    height: 2px;
    background: var(--magenta);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .25s;
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

/* Hero */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: clamp(24px, 4vh, 44px);
    padding: 96px var(--gutter) 30px;
    overflow: hidden;
    isolation: isolate;
}
.hero-plates {
    position: absolute;
    top: clamp(50px, 7vh, 90px);
    right: 3vw;
    width: min(44vw, 62vh);
    aspect-ratio: 1;
    z-index: 1;
    pointer-events: none;
    mix-blend-mode: multiply;
}
.hero-plates .plate { width: 58%; height: 58%; }
.hero-plates [data-plate="0"] { left: 0; top: 0; }
.hero-plates [data-plate="1"] { right: 0; top: 0; }
.hero-plates [data-plate="2"] { left: 0; bottom: 0; }
.hero-plates [data-plate="3"] { right: 0; bottom: 0; }

.reg { position: absolute; width: 18px; height: 18px; opacity: .55; }
.reg::before, .reg::after { content: ""; position: absolute; background: var(--ink); }
.reg::before { left: 50%; top: 0; bottom: 0; width: 1px; }
.reg::after { top: 50%; left: 0; right: 0; height: 1px; }
.reg-tl { left: var(--gutter); top: 74px; }
.reg-tr { right: 12px; top: 74px; }

.hero-tag { position: relative; z-index: 2; }
.hero-title {
    position: relative;
    z-index: 0;
    font-size: clamp(3.3rem, 9.5vw, 11.5rem);
    line-height: .94;
    letter-spacing: -0.05em;
    font-weight: 700;
    margin-top: -12px;
}
.hero-title .line { display: block; overflow: hidden; padding-bottom: .1em; margin-bottom: -.1em; }
.hero-title .line > span { display: block; }

.hero-foot {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 32px;
}
.hero-copy { max-width: 620px; flex: 1; }
.hero-sub { font-size: clamp(1.02rem, 1.35vw, 1.2rem); line-height: 1.42; color: #35322A; }
.hero-form {
    display: flex;
    gap: 6px;
    margin-top: 18px;
    padding: 5px;
    border-radius: 999px;
    background: #FBF9F3;
    border: 1.5px solid var(--ink);
}
.hero-form input {
    flex: 1;
    min-width: 0;
    padding: 0 16px;
    border: 0;
    background: transparent;
    outline: 0;
}
.hero-form:focus-within { box-shadow: 0 0 0 3px var(--yellow); }
.hero-form input::placeholder { color: var(--ink-2); }

.stats { display: flex; gap: clamp(20px, 3vw, 44px); flex: none; }
.stats dt { font-size: clamp(2.2rem, 3.6vw, 3.6rem); line-height: 1; font-weight: 650; letter-spacing: -0.04em; }
.stats dd { margin-top: 6px; font-family: var(--mono); font-size: 12px; color: var(--ink-2); max-width: 11ch; line-height: 1.3; }

/* Pinned overlap demo */
.overlap { background: var(--paper-2); border-block: 1px solid var(--line); }
.overlap-pin {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 82px var(--gutter) 28px;
    overflow: hidden;
    text-align: center;
}
.overlap-prompt {
    margin-top: 10px;
    font-size: clamp(1.5rem, 3.2vw, 2.9rem);
    font-weight: 650;
    letter-spacing: -0.03em;
    line-height: 1.1;
}
.overlap-grid {
    --stage: min(50vh, 36vw);
    position: relative;
    flex: 1;
    width: 100%;
    max-width: 1320px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--stage) minmax(0, 1fr);
    grid-template-rows: 1fr 1fr;
    align-items: center;
    gap: 8px clamp(40px, 6.5vw, 100px);
    margin-block: 8px;
    isolation: isolate;
}
.stage {
    position: relative;
    grid-column: 2;
    grid-row: 1 / span 2;
    width: var(--stage);
    height: var(--stage);
    place-self: center;
}
.stage .plate {
    width: 58%;
    height: 58%;
    left: 21%;
    top: 21%;
}
.stage-core {
    grid-column: 2;
    grid-row: 1 / span 2;
    place-self: center;
    z-index: 2;
    width: calc(var(--stage) * .29);
    color: var(--paper);
    font-weight: 650;
    font-size: clamp(10.5px, 1.75vh, 16px);
    line-height: 1.16;
    letter-spacing: -0.01em;
}
.answer {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-size: clamp(1.02rem, 1.6vw, 1.5rem);
    line-height: 1.16;
    letter-spacing: -0.02em;
    font-weight: 550;
    text-align: left;
}
.answer b {
    flex: none;
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--plate);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0;
}
.answer-a { grid-area: 1 / 1; }
.answer-b { grid-area: 1 / 3; }
.answer-c { grid-area: 2 / 1; }
.answer-d { grid-area: 2 / 3; }
.captions { position: relative; width: 100%; min-height: 1.5em; font-family: var(--mono); font-size: clamp(13px, 1.25vw, 16px); }
.captions p { position: absolute; inset: 0; }
html:not(.is-animated) .captions { display: grid; gap: 4px; }
html:not(.is-animated) .captions p { position: static; }

/* Why */
.why, .how, .faq, .models { padding: clamp(72px, 12vw, 170px) var(--gutter); }
.why-list { margin-top: clamp(40px, 6vw, 80px); border-top: 1.5px solid var(--ink); }
.why-list li {
    position: relative;
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) minmax(0, 1.2fr);
    gap: 16px 24px;
    align-items: baseline;
    padding: clamp(20px, 2.6vw, 34px) 0;
    border-bottom: 1.5px solid var(--ink);
}
.why-dot {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--plate);
    align-self: center;
    transition: transform .4s cubic-bezier(.2, .9, .2, 1.3);
}
.why-list li:hover .why-dot { transform: scale(1.7); }
.why-list h3 { font-size: clamp(1.7rem, 3.3vw, 3.1rem); line-height: 1.03; letter-spacing: -0.035em; font-weight: 650; }
.why-list p { color: #35322A; font-size: clamp(1rem, 1.3vw, 1.2rem); max-width: 46ch; }

/* Roster */
.models { padding-inline: 0; padding-top: 0; overflow: hidden; }
.models .eyebrow { padding-inline: var(--gutter); margin-bottom: 26px; }
.roster { display: grid; gap: 14px; }
.roster-row { display: flex; gap: clamp(26px, 4vw, 60px); width: max-content; align-items: center; will-change: transform; }
.roster-item {
    display: inline-flex;
    align-items: center;
    gap: clamp(10px, 1.3vw, 20px);
    font-size: clamp(3rem, 8.4vw, 8.5rem);
    line-height: 1.08;
    font-weight: 650;
    letter-spacing: -0.05em;
    white-space: nowrap;
}
.roster-item span.logo {
    display: grid;
    place-items: center;
    width: .78em;
    height: .78em;
    border-radius: 50%;
    background: var(--ink);
    overflow: hidden;
}
.roster-item img { width: 62%; height: 62%; object-fit: contain; }
.roster-row[data-direction="1"] .roster-item { color: transparent; -webkit-text-stroke: 1.5px var(--ink); }

/* How */
.how { padding-top: 0; }
.how-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(14px, 2vw, 28px); margin-top: clamp(36px, 5vw, 70px); }
.step {
    position: relative;
    padding: clamp(20px, 2.4vw, 32px);
    min-height: clamp(250px, 28vw, 400px);
    display: flex;
    flex-direction: column;
    background: #FBF9F3;
    border: 1.5px solid var(--ink);
    border-radius: 22px;
    overflow: hidden;
    isolation: isolate;
}
.step::before {
    content: "";
    position: absolute;
    z-index: -1;
    right: -18%;
    top: -22%;
    width: 72%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--plate);
    transition: transform .6s cubic-bezier(.2, .8, .2, 1);
}
.step:hover::before { transform: scale(1.22); }
.step-num { font-family: var(--mono); font-size: 14px; }
.step h3 { margin-top: auto; font-size: clamp(1.8rem, 3vw, 2.9rem); line-height: 1; letter-spacing: -0.04em; font-weight: 650; }
.step p { margin-top: 10px; color: #35322A; }

/* Token */
.token {
    position: relative;
    background: var(--ink);
    color: var(--paper);
    overflow: hidden;
    isolation: isolate;
}
.token .eyebrow { color: #A9A597; }
.token-plates {
    position: absolute;
    z-index: -1;
    top: 50%;
    right: 3vw;
    width: min(44vw, 82vh);
    aspect-ratio: 1;
    transform: translateY(-50%);
    pointer-events: none;
}
.token-plates .plate { mix-blend-mode: screen; width: 58%; height: 58%; }
.token-plates [data-plate="0"] { left: 0; top: 0; }
.token-plates [data-plate="1"] { right: 0; top: 0; }
.token-plates [data-plate="2"] { left: 0; bottom: 0; }
.token-plates [data-plate="3"] { right: 0; bottom: 0; }
.token-inner { padding: clamp(72px, 11vw, 160px) var(--gutter); }
.token-ticker {
    margin-top: 12px;
    margin-left: -.03em;
    font-size: clamp(5rem, 22vw, 25rem);
    line-height: .86;
    letter-spacing: -0.065em;
    font-weight: 700;
    mix-blend-mode: difference;
}
.token-title {
    margin-top: clamp(22px, 3vw, 40px);
    max-width: 21ch;
    font-size: clamp(1.7rem, 3.4vw, 3.2rem);
    line-height: 1.05;
    letter-spacing: -0.035em;
    font-weight: 600;
    text-wrap: balance;
}
.ca {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 16px;
    margin-top: clamp(26px, 3.5vw, 48px);
    width: fit-content;
    max-width: 100%;
    padding: 12px 14px 12px 20px;
    border-radius: 18px;
    border: 1.5px solid rgba(242, 239, 230, .4);
    background: rgba(21, 19, 15, .72);
    backdrop-filter: blur(10px);
}
.ca-label { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: #A9A597; }
.ca-value { font-family: var(--mono); font-size: 15px; overflow-wrap: anywhere; min-height: 40px; display: inline-flex; align-items: center; }
.token .btn-line:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.token-warn { margin-top: 16px; max-width: min(62ch, 44vw); font-size: 13.5px; line-height: 1.45; color: #B9B5A7; }

/* FAQ */
.faq { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 40px clamp(24px, 5vw, 80px); align-items: start; }
.faq-head { position: sticky; top: 90px; }
.faq .section-title { font-size: clamp(2.1rem, 4.3vw, 4.2rem); }
.faq-list { border-top: 1.5px solid var(--ink); }
.faq-list details { border-bottom: 1.5px solid var(--ink); }
.faq-list summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    min-height: 44px;
    padding: 20px 0;
    cursor: pointer;
    list-style: none;
    font-size: clamp(1.15rem, 1.9vw, 1.6rem);
    line-height: 1.15;
    font-weight: 600;
    letter-spacing: -0.02em;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i {
    position: relative;
    flex: none;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--yellow);
    transition: transform .3s, background-color .3s;
}
.faq-list summary i::before, .faq-list summary i::after {
    content: "";
    position: absolute;
    left: 7px; right: 7px; top: 12px;
    height: 2px;
    background: var(--ink);
}
.faq-list summary i::after { transform: rotate(90deg); }
.faq-list details[open] summary i { transform: rotate(45deg); background: var(--magenta); }
.faq-list details p { padding: 0 44px 24px 0; color: #35322A; max-width: 60ch; }

/* CTA + footer */
.cta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: clamp(24px, 3vw, 40px);
    padding: clamp(50px, 8vw, 110px) var(--gutter);
    background: var(--yellow);
}
.cta h2 {
    font-size: clamp(2.5rem, 7.4vw, 8rem);
    line-height: .97;
    letter-spacing: -0.05em;
    font-weight: 700;
    max-width: 15ch;
    text-wrap: balance;
}
.footer { background: var(--ink); color: var(--paper); overflow: hidden; }
.footer-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    padding: 22px var(--gutter) 0;
    font-family: var(--mono);
    font-size: 13px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--yellow); }
.footer-word {
    font-size: 37vw;
    line-height: .78;
    letter-spacing: -0.07em;
    font-weight: 700;
    text-align: center;
    margin: .07em 0 -.09em;
}

/* Chat */
.lineup {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 3px;
}
.lineup::-webkit-scrollbar { display: none; }
.chip {
    flex: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 38px;
    padding: 0 12px 0 7px;
    border-radius: 999px;
    border: 1.5px solid var(--line);
    font-size: 14px;
    font-weight: 550;
    color: var(--ink-2);
    transition: background-color .2s, border-color .2s, color .2s, transform .2s;
}
.chip img { width: 24px; height: 24px; padding: 4px; border-radius: 50%; background: var(--ink); object-fit: contain; opacity: .55; }
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip:active { transform: scale(.96); }
.chip[aria-pressed="true"] { background: var(--plate); border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] img { filter: none; opacity: 1; }
.chip[data-plate="3"][aria-pressed="true"] { color: #fff; }

.workspace { position: relative; flex: 1; min-height: 0; }
.columns {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    height: 100%;
}
.column {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    border-right: 1.5px solid var(--ink);
    background: var(--paper);
}
.column:last-child { border-right: 0; }
.column.is-ghost { opacity: .4; }
.column-head {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 48px;
    padding: 4px 6px 4px 14px;
    border-bottom: 1.5px solid var(--ink);
    background: color-mix(in srgb, var(--plate) 22%, var(--paper));
}
.column-plate { width: 12px; height: 12px; border-radius: 50%; background: var(--plate); box-shadow: 0 0 0 1.5px var(--ink); }
.column-head img { width: 26px; height: 26px; padding: 5px; border-radius: 50%; background: var(--ink); object-fit: contain; }
.column-head h3 { flex: 1; min-width: 0; font-size: 15.5px; font-weight: 650; letter-spacing: -0.015em; }
.column-drag { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; cursor: grab; fill: var(--ink-2); }
.column-drag:hover { fill: var(--ink); background: rgba(21, 19, 15, .08); }
.column-drag:active { cursor: grabbing; }
.column-thread { flex: 1; min-height: 0; overflow-y: auto; padding: 16px 14px 24px; }
.dots { display: inline-flex; gap: 0; height: 22px; align-items: center; padding-left: 2px; }
.dots i {
    width: 15px;
    height: 15px;
    margin-left: -4px;
    border-radius: 50%;
    mix-blend-mode: multiply;
    animation: dot 1.1s infinite ease-in-out;
}
.dots i:nth-child(1) { background: var(--cyan); }
.dots i:nth-child(2) { background: var(--magenta); animation-delay: .12s; }
.dots i:nth-child(3) { background: var(--yellow); animation-delay: .24s; }
.dots i:nth-child(4) { background: var(--violet); animation-delay: .36s; }
@keyframes dot { 0%, 100% { transform: translateX(0) scale(.8); } 50% { transform: translateX(3px) scale(1.1); } }

.chat-empty {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    overflow-y: auto;
    color: var(--ink-2);
    background: var(--paper);
}
.mark-large { width: clamp(96px, 16vh, 150px); height: clamp(96px, 16vh, 150px); margin-bottom: 16px; }
.chat-empty-title { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1; font-weight: 700; letter-spacing: -0.045em; color: var(--ink); margin-bottom: 6px; }

/* Screen wipe between the site and the app */
.wipe { position: fixed; inset: 0; z-index: 40; pointer-events: none; overflow: hidden; visibility: hidden; }
.wipe i {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    margin: -5px;
    border-radius: 50%;
    background: var(--plate);
}

/* Chinese typography: no negative tracking, a touch more leading */
html[lang="zh-CN"] :is(.hero-title, .section-title, .token-title, .cta h2, .why-list h3, .step h3, .overlap-prompt, .answer, .chat-empty-title, .faq-list summary, .tile h3, .agent-card h3, .dash-block-head h2, .modal-head h2, .doc-text h2, .share-question, .privacy-grid strong, .balance-value, .footer-claim) {
    letter-spacing: 0;
    line-height: 1.16;
}
html[lang="zh-CN"] .hero-title { font-size: clamp(3rem, 8.4vw, 10rem); line-height: 1.12; }
html[lang="zh-CN"] .eyebrow { letter-spacing: .04em; }

@media (max-width: 1000px) {
    .nav-links { display: none; }
    .hero-plates { width: min(58vw, 44vh); right: -4vw; }
    .hero-foot { flex-direction: column; align-items: stretch; }
    .stats { justify-content: space-between; }
    .faq { grid-template-columns: minmax(0, 1fr); }
    .faq-head { position: static; }
    .columns { overflow-x: auto; scroll-snap-type: x mandatory; grid-auto-columns: minmax(min(84vw, 380px), 1fr); }
    .column { scroll-snap-align: start; }
    .why-list li { grid-template-columns: 34px minmax(0, 1fr); }
    .why-list p { grid-column: 2; }
    .token-plates { top: auto; bottom: 28px; right: auto; left: 50%; width: min(84vw, 520px); transform: translateX(-50%); }
    .token-inner { padding-bottom: calc(min(84vw, 520px) + 64px); }
    .token-warn { max-width: 62ch; }
}

@media (max-width: 720px) {
    body { font-size: 16px; }
    .hero { justify-content: flex-end; }
    .hero-title { font-size: clamp(3rem, 15.2vw, 5.6rem); }
    html[lang="zh-CN"] .hero-title { font-size: clamp(2.5rem, 12.6vw, 5rem); }
    .hero-plates { top: 66px; width: min(68vw, 34vh); }
    .reg { display: none; }
    .hero-form .btn { padding: 0 18px; }
    .stats dd { font-size: 11px; }
    .overlap-grid {
        --stage: min(70vw, 35vh);
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        grid-template-rows: auto minmax(0, 1fr) auto;
        gap: 10px;
    }
    .answer { font-size: .92rem; gap: 8px; }
    .answer b { width: 24px; height: 24px; font-size: 11px; }
    .answer-a { grid-area: 1 / 1; }
    .answer-b { grid-area: 1 / 2; }
    .answer-c { grid-area: 3 / 1; }
    .answer-d { grid-area: 3 / 2; }
    .stage, .stage-core { grid-column: 1 / span 2; grid-row: 2; }
    .stage-core { font-size: 11px; }
    .how-steps { grid-template-columns: minmax(0, 1fr); }
    .step { min-height: 210px; }
    .step::before { width: 44%; right: -10%; top: -18%; }
    .faq-list details p { padding-right: 0; }
    .brand span { font-size: 19px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}