:root {
    --bg: #08090b;
    --bg-2: #0d0f13;
    --surface: #12151a;
    --surface-2: #181c22;
    --surface-3: #1e232b;
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.16);
    --text: #f5f3ec;
    --muted: #a5a8b0;
    --dim: #777c86;
    --accent: #ffb454;
    --accent-2: #ffd79a;
    --accent-ink: #1b1205;
    --accent-soft: rgba(255, 180, 84, 0.11);
    --accent-border: rgba(255, 180, 84, 0.32);
    --green: #7ee0aa;
    --danger: #ff9b9b;
    --radius: 22px;
    --radius-sm: 14px;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.46);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
        "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --max: 1180px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(900px 640px at 82% -8%, rgba(255, 180, 84, 0.16), transparent 60%),
        radial-gradient(720px 520px at 8% 12%, rgba(255, 180, 84, 0.055), transparent 60%),
        var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black 10%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black 10%, transparent 75%);
}

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

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

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
ul,
ol {
    margin: 0;
}

ul,
ol {
    padding: 0;
}

.skip-link {
    position: fixed;
    left: 16px;
    top: -100px;
    z-index: 100;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 700;
}

.skip-link:focus {
    top: 16px;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid transparent;
    background: rgba(8, 9, 11, 0.78);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    backdrop-filter: blur(18px) saturate(140%);
}

.site-header.is-scrolled {
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 28px;
    min-height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    flex: 0 0 auto;
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(255, 180, 84, 0.22);
}

.brand-text {
    display: grid;
    gap: 1px;
    line-height: 1.1;
}

.brand-word {
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.brand-sub {
    color: var(--dim);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 26px;
    margin-left: 10px;
}

.nav a {
    color: var(--muted);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: color 0.18s ease;
}

.nav a:hover,
.nav a:focus-visible {
    color: var(--text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 52px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 48px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease,
        background 0.18s ease, color 0.18s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-2), var(--accent) 55%, #ec9a3e);
    color: var(--accent-ink);
    box-shadow: 0 14px 40px rgba(255, 180, 84, 0.2);
}

.btn-primary:hover {
    box-shadow: 0 18px 48px rgba(255, 180, 84, 0.3);
}

.btn-ghost {
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.025);
    color: var(--text);
}

.btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.055);
}

.btn-small {
    min-height: 38px;
    padding: 0 16px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

.btn .arrow {
    font-size: 15px;
    line-height: 1;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.hero {
    position: relative;
    z-index: 1;
    padding: 86px 0 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 52px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 22px;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.hero h1 {
    max-width: 760px;
    font-size: clamp(3rem, 7.2vw, 6.1rem);
    font-weight: 800;
    letter-spacing: -0.06em;
    line-height: 0.98;
}

.hero h1 em {
    color: var(--accent);
    font-style: normal;
}

.lede {
    max-width: 580px;
    margin-top: 28px;
    color: var(--muted);
    font-size: clamp(1rem, 1.7vw, 1.16rem);
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.hero-meta {
    margin-top: 18px;
    color: var(--dim);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
}

.trust-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    margin-top: 34px;
    list-style: none;
}

.trust-list li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 12px;
}

.trust-list li::before {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--green);
}

.hero-visual {
    position: relative;
    min-height: 620px;
    display: grid;
    place-items: center;
}

.hero-glow {
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 180, 84, 0.2), transparent 65%);
    filter: blur(12px);
}

.phone {
    position: relative;
    z-index: 2;
    width: min(332px, 100%);
    padding: 11px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 46px;
    background: linear-gradient(155deg, #2a2d34 0%, #121418 38%, #07080a 100%);
    box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
    transform: rotate(-2.4deg);
}

.phone::after {
    content: "";
    position: absolute;
    inset: 3px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 43px;
    pointer-events: none;
}

.phone-screen {
    position: relative;
    overflow: hidden;
    min-height: 580px;
    padding: 18px 16px 20px;
    border-radius: 36px;
    background:
        radial-gradient(280px 220px at 80% 0%, rgba(255, 180, 84, 0.12), transparent 65%),
        #0a0c0f;
}

.phone-notch {
    width: 86px;
    height: 22px;
    margin: -4px auto 14px;
    border-radius: 0 0 16px 16px;
    background: #050607;
}

.phone-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--dim);
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.1em;
}

.phone-top .dots {
    display: flex;
    gap: 4px;
}

.phone-top .dots i {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--dim);
    opacity: 0.7;
}

.app-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
}

.app-bar strong {
    font-size: 13px;
    letter-spacing: -0.01em;
}

.app-bar span {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 9px;
}

.chat {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.bubble {
    max-width: 88%;
    padding: 11px 13px;
    border-radius: 15px;
    font-size: 11.5px;
    line-height: 1.55;
}

.bubble.user {
    justify-self: end;
    border: 1px solid rgba(255, 180, 84, 0.18);
    border-bottom-right-radius: 5px;
    background: rgba(255, 180, 84, 0.12);
    color: #f8e7cb;
}

.bubble.app {
    justify-self: start;
    border: 1px solid var(--border);
    border-bottom-left-radius: 5px;
    background: var(--surface);
    color: var(--muted);
}

.bubble.app strong {
    color: var(--text);
}

.mini-app {
    margin-top: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: linear-gradient(180deg, #15191f, #0e1116);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
}

.mini-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.mini-head h3 {
    font-size: 13px;
    letter-spacing: -0.01em;
}

.mini-head span {
    padding: 3px 7px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 8px;
    letter-spacing: 0.08em;
}

.progress {
    height: 7px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.08);
}

.progress span {
    display: block;
    width: 38%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.progress-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 7px;
    color: var(--dim);
    font-family: var(--mono);
    font-size: 8px;
}

.cups {
    display: flex;
    gap: 5px;
    margin-top: 12px;
}

.cup {
    width: 15px;
    height: 19px;
    border: 1px solid rgba(255, 180, 84, 0.35);
    border-radius: 3px 3px 7px 7px;
    background: rgba(255, 180, 84, 0.08);
}

.cup.full {
    border-color: var(--accent);
    background: linear-gradient(180deg, var(--accent-2), var(--accent));
}

.mini-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 30px;
    margin-top: 12px;
    border: 0;
    border-radius: 9px;
    background: var(--accent);
    color: var(--accent-ink);
    font-size: 10px;
    font-weight: 800;
}

.floating {
    position: absolute;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 13px;
    border: 1px solid var(--border-strong);
    border-radius: 13px;
    background: rgba(18, 21, 26, 0.9);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.34);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    color: var(--muted);
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.04em;
    animation: float 6s ease-in-out infinite;
}

.floating strong {
    color: var(--text);
    font-weight: 600;
}

.floating .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(126, 224, 170, 0.12);
}

.floating.one {
    top: 76px;
    left: -6px;
}

.floating.two {
    right: -10px;
    bottom: 92px;
    animation-delay: -2.4s;
}

.floating.two .dot {
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.logo-strip {
    position: relative;
    z-index: 1;
    padding: 20px 0 8px;
}

.strip-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.strip-label {
    color: var(--dim);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.strip-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.strip-chips span {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    font-size: 11px;
}

.section {
    position: relative;
    z-index: 1;
    padding: 96px 0;
}

.section-head {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 36px;
    align-items: end;
    margin-bottom: 42px;
}

.kicker {
    margin-bottom: 14px;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.section h2 {
    max-width: 760px;
    font-size: clamp(2rem, 4.2vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.045em;
    line-height: 1.04;
}

.section-lede {
    max-width: 520px;
    justify-self: end;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.7;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.feature-card {
    position: relative;
    overflow: hidden;
    min-height: 220px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0.012));
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.feature-card::after {
    content: "";
    position: absolute;
    right: -50px;
    bottom: -70px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 180, 84, 0.08), transparent 65%);
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.016));
}

.icon-box {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--accent-border);
    border-radius: 13px;
    background: var(--accent-soft);
    color: var(--accent);
}

.icon-box svg {
    width: 21px;
    height: 21px;
    stroke: currentColor;
    stroke-width: 1.7;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.feature-card h3 {
    margin-top: 22px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.feature-card p {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.7;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.step {
    padding: 32px 30px 36px;
    border-right: 1px solid var(--border);
}

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

.step-num {
    color: transparent;
    font-family: var(--mono);
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.08em;
    line-height: 1;
    -webkit-text-stroke: 1px rgba(255, 180, 84, 0.55);
}

.step h3 {
    margin-top: 18px;
    font-size: 17px;
    letter-spacing: -0.02em;
}

.step p {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.7;
}

.step code {
    display: inline-block;
    margin-top: 15px;
    padding: 6px 9px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: rgba(0, 0, 0, 0.18);
    color: var(--accent-2);
    font-family: var(--mono);
    font-size: 10px;
}

.capability-band {
    position: relative;
    z-index: 1;
    padding: 30px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.012);
}

.capability-inner {
    display: flex;
    align-items: center;
    gap: 30px;
}

.capability-copy {
    flex: 0 0 260px;
}

.capability-copy h3 {
    font-size: 16px;
    letter-spacing: -0.02em;
}

.capability-copy p {
    margin-top: 4px;
    color: var(--dim);
    font-size: 12px;
}

.cap-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.cap-list li {
    padding: 7px 11px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    font-size: 11.5px;
}

.cap-list li::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 4px;
    margin-right: 7px;
    border-radius: 50%;
    background: var(--accent);
    vertical-align: 2px;
}

.download-band {
    position: relative;
    z-index: 1;
    margin: 44px 0;
    padding: 58px;
    overflow: hidden;
    border: 1px solid var(--accent-border);
    border-radius: 30px;
    background:
        radial-gradient(600px 340px at 88% 0%, rgba(255, 180, 84, 0.16), transparent 60%),
        linear-gradient(145deg, #171a20, #0e1014);
}

.download-band::before {
    content: "";
    position: absolute;
    right: -120px;
    bottom: -160px;
    width: 420px;
    height: 420px;
    border: 1px solid rgba(255, 180, 84, 0.15);
    border-radius: 50%;
    pointer-events: none;
}

.download-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
    gap: 48px;
    align-items: center;
}

.download-copy h2 {
    max-width: 620px;
    font-size: clamp(2rem, 4vw, 3.3rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.04;
}

.download-copy p {
    max-width: 520px;
    margin-top: 18px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
}

.download-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 26px;
}

.fineprint {
    margin-top: 16px;
    color: var(--dim);
    font-size: 11px;
    line-height: 1.6;
}

.download-card {
    padding: 22px;
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    background: rgba(8, 9, 11, 0.6);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.release-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.release-title {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 13px;
    font-weight: 700;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(126, 224, 170, 0.1);
}

.release-tag {
    padding: 4px 8px;
    border: 1px solid var(--accent-border);
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.08em;
}

.release-rows {
    display: grid;
    gap: 11px;
    margin-top: 17px;
}

.release-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    font-size: 11px;
}

.release-row dt {
    color: var(--dim);
}

.release-row dd {
    margin: 0;
    color: var(--text);
    font-family: var(--mono);
    font-size: 10px;
    text-align: right;
    overflow-wrap: anywhere;
}

.release-card-btn {
    margin-top: 18px;
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.safety-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.018);
}

.check {
    flex: 0 0 28px;
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border: 1px solid rgba(126, 224, 170, 0.3);
    border-radius: 50%;
    background: rgba(126, 224, 170, 0.08);
    color: var(--green);
    font-size: 13px;
    font-weight: 800;
}

.safety-item h3 {
    font-size: 15px;
    letter-spacing: -0.01em;
}

.safety-item p {
    margin-top: 6px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.7;
}

.safety-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 18px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
}

.safety-link:hover {
    color: var(--accent-2);
}

.faq {
    display: grid;
    gap: 10px;
    max-width: 900px;
}

details {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.018);
}

details[open] {
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.03);
}

summary {
    position: relative;
    padding: 18px 48px 18px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    list-style: none;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: "+";
    position: absolute;
    right: 20px;
    top: 50%;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 18px;
    font-weight: 400;
    transform: translateY(-50%);
    transition: transform 0.2s ease;
}

details[open] summary::after {
    content: "−";
}

.faq-body {
    padding: 0 20px 20px;
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.75;
}

.faq-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.cta-band {
    position: relative;
    z-index: 1;
    padding: 70px 0 100px;
    text-align: center;
}

.cta-band h2 {
    max-width: 900px;
    margin-inline: auto;
    font-size: clamp(2rem, 4.8vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.05;
}

.cta-band p {
    max-width: 560px;
    margin: 18px auto 0;
    color: var(--muted);
    font-size: 15px;
}

.cta-band .btn {
    margin-top: 28px;
}

.site-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    background: rgba(5, 6, 8, 0.55);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, minmax(0, 0.55fr));
    gap: 36px;
    padding: 54px 0 40px;
}

.footer-brand p {
    max-width: 280px;
    margin-top: 14px;
    color: var(--dim);
    font-size: 12px;
    line-height: 1.7;
}

.footer-col h3 {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.footer-col ul {
    display: grid;
    gap: 9px;
    margin-top: 15px;
    list-style: none;
}

.footer-col a {
    color: var(--dim);
    font-size: 12px;
    transition: color 0.18s ease;
}

.footer-col a:hover {
    color: var(--text);
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 0 28px;
    border-top: 1px solid var(--border);
    color: var(--dim);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.02em;
}

.page-hero {
    position: relative;
    z-index: 1;
    padding: 80px 0 42px;
}

.page-hero h1 {
    max-width: 900px;
    font-size: clamp(2.4rem, 5.8vw, 4.8rem);
    font-weight: 800;
    letter-spacing: -0.055em;
    line-height: 1.02;
}

.page-hero p {
    max-width: 660px;
    margin-top: 20px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.75;
}

.download-page-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
    gap: 30px;
    align-items: start;
    padding-bottom: 80px;
}

.panel {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.012));
}

.panel h2 {
    font-size: 18px;
    letter-spacing: -0.02em;
}

.panel p,
.panel li {
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.75;
}

.panel p {
    margin-top: 10px;
}

.panel ul,
.panel ol {
    display: grid;
    gap: 9px;
    margin-top: 14px;
    padding-left: 20px;
}

.panel li::marker {
    color: var(--accent);
}

.panel + .panel {
    margin-top: 14px;
}

.release-card-lg {
    padding: 26px;
}

.release-card-lg .release-row {
    font-size: 12px;
}

.release-card-lg .release-row dd {
    font-size: 10.5px;
}

.copy-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.copy-row:last-of-type {
    border-bottom: 0;
}

.copy-label {
    color: var(--dim);
    font-size: 10px;
    font-family: var(--mono);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.copy-value {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    color: var(--text);
    font-family: var(--mono);
    font-size: 10px;
    overflow-wrap: anywhere;
    text-align: right;
}

.copy-btn {
    flex: 0 0 auto;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--muted);
    font-family: var(--mono);
    font-size: 9px;
    cursor: pointer;
}

.copy-btn:hover {
    border-color: var(--border-strong);
    color: var(--text);
}

.clipboard-helper {
    position: fixed;
    left: -9999px;
    top: 0;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.note {
    margin-top: 16px;
    padding: 13px 14px;
    border: 1px solid var(--accent-border);
    border-radius: 11px;
    background: var(--accent-soft);
    color: #f0d7b3;
    font-size: 11.5px;
    line-height: 1.7;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 11px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.025);
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.05em;
}

.status-pill .status-dot {
    width: 6px;
    height: 6px;
}

.legal-page {
    position: relative;
    z-index: 1;
    padding: 70px 0 100px;
}

.legal-wrap {
    max-width: 880px;
    margin-inline: auto;
}

.legal-wrap > h1 {
    max-width: 900px;
    font-size: clamp(2.5rem, 5.4vw, 4.4rem);
    font-weight: 800;
    letter-spacing: -0.055em;
    line-height: 1.03;
}

.mt-16 {
    margin-top: 16px;
}

.mt-18 {
    margin-top: 18px;
}

.legal-meta {
    margin-top: 14px;
    color: var(--dim);
    font-family: var(--mono);
    font-size: 11px;
}

.legal {
    margin-top: 34px;
    padding: 38px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.018);
}

.legal h2 {
    margin-top: 34px;
    font-size: 20px;
    letter-spacing: -0.02em;
}

.legal h2:first-child {
    margin-top: 0;
}

.legal h3 {
    margin-top: 24px;
    font-size: 15px;
}

.legal p,
.legal li {
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.85;
}

.legal p {
    margin-top: 12px;
}

.legal ul,
.legal ol {
    display: grid;
    gap: 8px;
    margin-top: 12px;
    padding-left: 22px;
}

.legal li::marker {
    color: var(--accent);
}

.legal a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.legal table {
    width: 100%;
    margin-top: 18px;
    border-collapse: collapse;
    font-size: 12px;
}

.legal th,
.legal td {
    padding: 10px 12px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.legal th {
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
}

.legal td {
    color: var(--muted);
}

.legal .small {
    color: var(--dim);
    font-size: 11.5px;
}

html[data-lang="zh"] .lang-en,
html[data-lang="en"] .lang-zh {
    display: none !important;
}

html[data-lang="zh"] .lang-zh,
html[data-lang="en"] .lang-en {
    display: block;
}

.error-page {
    display: grid;
    place-items: center;
    min-height: 70vh;
    padding: 80px 0;
    text-align: center;
}

.error-page .code {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 96px;
    font-weight: 700;
    letter-spacing: -0.08em;
    line-height: 1;
}

.error-page h1 {
    margin-top: 14px;
    font-size: 28px;
}

.error-page p {
    max-width: 460px;
    margin-top: 12px;
    color: var(--muted);
    font-size: 14px;
}

.error-page .btn {
    margin-top: 24px;
}

@media (max-width: 960px) {
    .nav {
        display: none;
    }

    .hero {
        padding-top: 64px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .hero-visual {
        min-height: 560px;
    }

    .section-head {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .section-lede {
        justify-self: start;
    }

    .feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .download-band {
        padding: 40px;
    }

    .download-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .download-page-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, minmax(0, 0.55fr));
    }
}

@media (max-width: 720px) {
    .wrap {
        width: min(var(--max), calc(100% - 32px));
    }

    .header-inner {
        gap: 14px;
        min-height: 64px;
    }

    .brand-sub {
        display: none;
    }

    .header-actions .btn {
        display: none;
    }

    .hero {
        padding: 46px 0 34px;
    }

    .hero h1 {
        font-size: clamp(2.6rem, 12vw, 4.2rem);
    }

    .lede {
        margin-top: 20px;
    }

    .hero-actions .btn {
        flex: 1 1 auto;
    }

    .hero-visual {
        min-height: 530px;
    }

    .phone {
        width: min(310px, 100%);
        transform: none;
    }

    .floating.one {
        top: 28px;
        left: -2px;
    }

    .floating.two {
        right: -2px;
        bottom: 42px;
    }

    .section {
        padding: 64px 0;
    }

    .section h2 {
        font-size: clamp(1.9rem, 8vw, 2.8rem);
    }

    .feature-grid,
    .safety-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: 0;
    }

    .steps {
        grid-template-columns: 1fr;
    }

    .step {
        padding: 24px 0 28px;
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .step:last-child {
        border-bottom: 0;
    }

    .step-num {
        font-size: 34px;
    }

    .capability-inner {
        display: block;
    }

    .capability-copy {
        margin-bottom: 16px;
    }

    .download-band {
        margin: 20px 0;
        padding: 28px 22px;
        border-radius: 22px;
    }

    .download-card {
        padding: 18px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
        padding-top: 40px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .legal {
        padding: 24px 18px;
    }

    .legal-page,
    .page-hero {
        padding-top: 48px;
    }
}

@media (max-width: 480px) {
    .brand-word {
        font-size: 15px;
    }

    .brand-mark {
        width: 34px;
        height: 34px;
    }

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

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

    .hero-meta {
        font-size: 10px;
    }

    .hero-visual {
        min-height: 500px;
    }

    .phone {
        width: 290px;
    }

    .phone-screen {
        min-height: 540px;
    }

    .floating {
        padding: 8px 10px;
        font-size: 8px;
    }

    .floating.one {
        top: 10px;
    }

    .floating.two {
        bottom: 24px;
    }

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

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

    .download-band {
        padding: 24px 18px;
    }

    .copy-row {
        display: block;
    }

    .copy-value {
        justify-content: space-between;
        margin-top: 6px;
        text-align: left;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        display: block;
        line-height: 1.9;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

@media print {
    .site-header,
    .site-footer,
    .lang-toggle,
    .btn,
    .floating {
        display: none !important;
    }

    body {
        background: #fff;
        color: #111;
    }

    .legal {
        border: 0;
        padding: 0;
        background: none;
    }

    .legal p,
    .legal li,
    .legal td {
        color: #333;
    }
}