:root {
    --bg: #070b12;
    --bg-2: #0c121b;
    --ink: #eef6f4;
    --muted: #8fa0ab;
    --line: rgba(62, 224, 196, 0.18);
    --line-soft: rgba(143, 160, 171, 0.16);
    --cyan: #3ee0c4;
    --cyan-dim: rgba(62, 224, 196, 0.1);
    --amber: #f5a524;
    --danger: #fb7185;
    --font: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, monospace;
    --nav-h: 68px;
}
* { box-sizing: border-box; }
html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 16px);
    -webkit-text-size-adjust: 100%;
}
body {
    margin: 0;
    color: var(--ink);
    font-family: var(--font);
    background:
        radial-gradient(1100px 620px at 78% -12%, rgba(62, 224, 196, 0.09), transparent 55%),
        radial-gradient(880px 520px at -12% 18%, rgba(56, 132, 255, 0.08), transparent 50%),
        var(--bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
img { max-width: 100%; }
:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.mono { font-family: var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }

/* ambient layers */
.grid-bg {
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(rgba(62, 224, 196, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(62, 224, 196, 0.045) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
    mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
}
.spot {
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: 1;
    background: radial-gradient(460px circle at var(--mx, 72%) var(--my, 16%), rgba(62, 224, 196, 0.1), transparent 48%);
}

/* top bar */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 40;
    background: rgba(7, 11, 18, 0.66);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease;
}
.topbar.is-stuck {
    background: rgba(7, 11, 18, 0.9);
    border-bottom-color: var(--line);
}
.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--nav-h);
    gap: 16px;
}
.brand {
    display: flex; align-items: baseline; gap: 10px;
    font-weight: 700; letter-spacing: -0.02em;
    position: relative; z-index: 2;
}
.brand i { color: var(--cyan); font-style: normal; }
.brand span { color: var(--muted); font-size: 11px; font-weight: 500; letter-spacing: 0.14em; }
.nav { display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav a { position: relative; padding: 4px 0; transition: color 0.2s ease; }
.nav a::after {
    content: "";
    position: absolute; left: 0; right: 0; bottom: -2px;
    height: 1px; background: var(--cyan);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.25s ease;
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a.is-on::after { transform: scaleX(1); }
.nav a.is-on { color: var(--ink); }
.pill {
    font-size: 12px;
    color: var(--cyan);
    border: 1px solid var(--line);
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--cyan-dim);
    white-space: nowrap;
}
.pill::after { display: none !important; }
.nav-toggle {
    display: none;
    width: 42px; height: 42px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    border-radius: 6px;
}

/* buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 48px; padding: 0 20px; border-radius: 999px;
    border: 1px solid transparent; font-weight: 600; cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.25s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn-cyan {
    background: var(--cyan); color: #04120f;
    box-shadow: 0 8px 30px rgba(62, 224, 196, 0.2);
}
.btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 12px 38px rgba(62, 224, 196, 0.3); }
.btn-ghost {
    border-color: var(--line); background: rgba(255, 255, 255, 0.02); color: var(--ink);
}
.btn-ghost:hover { border-color: var(--cyan); transform: translateY(-2px); }
.btn-amber { background: var(--amber); color: #1a1205; }

/* hero */
.hero {
    position: relative;
    z-index: 2;
    min-height: calc(100svh - var(--nav-h));
    margin-top: var(--nav-h);
    display: grid;
    align-items: center;
    overflow: hidden;
    padding: 48px 0 72px;
}
.hero-glow {
    position: absolute;
    top: -22%; right: -8%;
    width: 780px; height: 780px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(62, 224, 196, 0.16), transparent 62%);
    filter: blur(20px);
    pointer-events: none;
}
.hero-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
    align-items: center;
    gap: 52px;
}
.hero-copy { max-width: 34em; }
.kicker {
    color: var(--cyan);
    font-family: var(--mono);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 12px;
    margin-bottom: 18px;
}
h1 {
    margin: 0 0 18px;
    font-size: clamp(38px, 5.2vw, 68px);
    line-height: 0.98;
    letter-spacing: -0.045em;
}
.typewriter {
    display: block;
    min-height: 1.05em;
    color: var(--cyan);
    text-shadow: 0 0 30px rgba(62, 224, 196, 0.25);
}
.typewriter::after {
    content: "";
    display: inline-block;
    width: 0.07em; height: 0.86em;
    margin-left: 5px;
    background: var(--cyan);
    animation: blink 1s steps(1) infinite;
    vertical-align: -0.06em;
}
@keyframes blink { 50% { opacity: 0; } }
.lede { margin: 0; color: #c3d0cd; font-size: 17px; line-height: 1.75; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* hero product shot */
.hero-shot { position: relative; }
.frame {
    margin: 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    background: #0b1014;
    box-shadow:
        0 40px 90px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(62, 224, 196, 0.06);
    transform: perspective(1600px) rotateY(-7deg) rotateX(2deg);
    transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.frame:hover { transform: perspective(1600px) rotateY(-2deg) rotateX(0deg) translateY(-4px); }
.frame-bar {
    display: flex; align-items: center; gap: 7px;
    padding: 11px 14px;
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--line);
}
.frame-bar > span {
    width: 9px; height: 9px; border-radius: 50%;
    background: rgba(143, 160, 171, 0.4);
}
.frame-bar > span:first-child { background: rgba(251, 113, 133, 0.55); }
.frame-bar > span:nth-child(2) { background: rgba(245, 165, 36, 0.55); }
.frame-bar > span:nth-child(3) { background: rgba(62, 224, 196, 0.55); }
.frame-url {
    margin-left: 10px;
    font-size: 10px;
    color: var(--muted);
    font-style: normal;
    letter-spacing: 0.06em;
    text-transform: none;
}
.frame img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: top center;
}

/* sections */
.section {
    position: relative;
    z-index: 2;
    padding: 92px 0;
    border-top: 1px solid var(--line-soft);
    scroll-margin-top: calc(var(--nav-h) + 16px);
}
.section-lead {
    border-top: 0;
    padding-top: calc(var(--nav-h) + 56px);
    padding-bottom: 0;
}
.section-lead .intro { margin-bottom: 0; }
.section h2 { margin: 0 0 14px; font-size: clamp(28px, 4vw, 46px); letter-spacing: -0.035em; line-height: 1.08; }
.section .intro { margin: 0 0 40px; color: var(--muted); max-width: 42em; line-height: 1.75; }

/* capabilities: editorial rows, no imagery */
.caps { display: grid; border-top: 1px solid var(--line-soft); }
.capline {
    display: grid;
    grid-template-columns: 56px minmax(0, 0.9fr) minmax(0, 1.2fr);
    gap: 28px;
    align-items: baseline;
    padding: 26px 12px 26px 4px;
    border-bottom: 1px solid var(--line-soft);
    transition: background 0.3s ease;
}
.capline:hover { background: linear-gradient(90deg, rgba(62, 224, 196, 0.05), transparent 65%); }
.capline b { color: var(--cyan); font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; }
.capline h3 { margin: 0; font-size: clamp(20px, 2.2vw, 27px); letter-spacing: -0.025em; }
.capline p { margin: 0; color: var(--muted); line-height: 1.75; }

/* stage + rail */
.stage-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    gap: 18px;
}
.stage {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 10px;
    min-height: 440px;
    background: #0b1014;
    box-shadow: 0 26px 70px rgba(0, 0, 0, 0.4);
}
.stage img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: cover; object-position: top center;
    opacity: 0;
    transition: opacity 0.45s ease;
}
.stage img.is-on { opacity: 1; }
.stage-meta {
    position: absolute; left: 16px; right: 16px; bottom: 16px;
    padding: 18px 20px;
    background: rgba(7, 11, 18, 0.82);
    border: 1px solid var(--line);
    border-radius: 8px;
    backdrop-filter: blur(14px);
}
.stage-meta h3 { margin: 0 0 6px; font-size: clamp(22px, 2.4vw, 30px); letter-spacing: -0.03em; }
.stage-meta p { margin: 0; color: #c3d0cd; line-height: 1.6; }
.stage-meta .cta-row { margin-top: 16px; }
.rail { display: grid; gap: 10px; align-content: start; }
.rail-item {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 9px;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    background: rgba(255, 255, 255, 0.02);
    color: inherit;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.rail-item:hover, .rail-item.is-on {
    border-color: var(--cyan);
    background: var(--cyan-dim);
    transform: translateX(3px);
}
.rail-item img { width: 92px; height: 58px; object-fit: cover; object-position: top center; display: block; border-radius: 4px; }
.rail-item strong { display: block; font-size: 15px; letter-spacing: -0.01em; }
.rail-item span { color: var(--muted); font-size: 12px; }
.rail-more {
    display: grid; gap: 3px;
    padding: 16px;
    border: 1px dashed var(--line);
    border-radius: 8px;
    transition: border-color 0.2s ease, background 0.2s ease;
}
.rail-more:hover { border-color: var(--cyan); background: var(--cyan-dim); }
.rail-more strong { font-size: 15px; }
.rail-more span { color: var(--muted); font-size: 12px; }

/* process */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.step { padding: 16px 0 4px; border-top: 2px solid var(--cyan); }
.step b { display: block; color: var(--cyan); font-family: var(--mono); font-size: 12px; margin-bottom: 12px; }
.step h3 { margin: 0 0 8px; font-size: 21px; letter-spacing: -0.02em; }
.step p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 14px; }

/* faq */
.faq { border-top: 1px solid var(--line-soft); }
.faq details { border-bottom: 1px solid var(--line-soft); }
.faq summary {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    cursor: pointer; list-style: none;
    padding: 20px 4px;
    font-size: clamp(17px, 1.8vw, 20px);
    transition: color 0.2s ease;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "+";
    color: var(--cyan);
    font-family: var(--mono);
    font-size: 20px;
    transition: transform 0.25s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--cyan); }
.faq details p { margin: 0 0 20px; padding-right: 40px; color: var(--muted); line-height: 1.8; }

/* theme library */
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 0 0 18px; }
.toolbar input[type="search"] {
    flex: 1 1 220px; min-width: 180px;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.02);
}
.toolbar .pill { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.toolbar .pill input { width: auto; accent-color: var(--cyan); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.filter-btn {
    min-height: 38px; padding: 0 15px; border-radius: 999px;
    border: 1px solid var(--line-soft); background: transparent; color: var(--muted);
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.filter-btn:hover { color: var(--ink); border-color: var(--cyan); }
.filter-btn.is-active { color: #04120f; background: var(--cyan); border-color: var(--cyan); }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px 22px; }
.tile { display: flex; flex-direction: column; min-height: 100%; }
.tile-cover {
    position: relative; aspect-ratio: 16/10; overflow: hidden;
    border: 1px solid var(--line-soft); border-radius: 8px; background: #0b0f14;
}
.tile-cover img {
    width: 100%; height: 100%; object-fit: cover; object-position: top center;
    display: block; transition: transform 0.5s ease;
}
.tile:hover .tile-cover { border-color: var(--cyan); }
.tile:hover .tile-cover img { transform: scale(1.04); }
.status {
    position: absolute; left: 10px; top: 10px; padding: 5px 10px;
    font-size: 11px; border-radius: 999px;
    background: rgba(7, 11, 18, 0.86); border: 1px solid var(--line);
    backdrop-filter: blur(8px);
}
.status-ready { color: var(--cyan); }
.status-locked { color: var(--amber); }
.tile-body { padding: 16px 0 8px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.tag { color: var(--muted); font-size: 11px; }
.tile h3 { margin: 0; font-size: 23px; letter-spacing: -0.03em; }
.tile p, .hint { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.tile .btn, .tile .cta-row { margin-top: auto; }
.tile .cta-row { margin-bottom: 0; }

/* contact */
.contact-sec { border-top: 1px solid var(--line); }
.contact-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(62, 224, 196, 0.05), rgba(12, 18, 27, 0.6));
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}
.contact-aside {
    padding: 38px 34px;
    border-right: 1px solid var(--line-soft);
    background: rgba(62, 224, 196, 0.035);
}
.contact-label {
    margin: 0 0 10px;
    color: var(--cyan);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.contact-lines { margin: 0 0 18px; display: grid; gap: 14px; }
.contact-line { display: grid; gap: 4px; }
.contact-line dt {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.contact-line dd {
    margin: 0;
    font-size: clamp(24px, 2.8vw, 34px);
    letter-spacing: -0.02em;
    line-height: 1.05;
    font-variant-numeric: tabular-nums;
}
.contact-line dd a { transition: color 0.2s ease; }
.contact-line dd a:hover { color: var(--cyan); }
.contact-note { margin: 0; color: #b6c4c1; line-height: 1.75; font-size: 15px; }
.copy-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 16px; }
.link-btn {
    padding: 0;
    border: 0;
    background: none;
    color: var(--muted);
    font-size: 13px;
    cursor: pointer;
    border-bottom: 1px dashed var(--line);
    transition: color 0.2s ease, border-color 0.2s ease;
}
.link-btn:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.contact-aside .cta-row { margin-top: 24px; }
.contact-points {
    margin: 30px 0 0; padding: 22px 0 0;
    list-style: none;
    border-top: 1px solid var(--line-soft);
    color: var(--muted); font-size: 13px; line-height: 1.9;
}
.contact-form { padding: 38px 34px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
label { font-size: 12px; color: var(--muted); letter-spacing: 0.02em; }
input, select, textarea {
    width: 100%;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    background: rgba(7, 11, 18, 0.6);
    color: var(--ink);
    padding: 13px 14px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input::placeholder, textarea::placeholder { color: rgba(143, 160, 171, 0.6); }
input:focus, select:focus, textarea:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(62, 224, 196, 0.1);
    outline: none;
}
textarea { min-height: 128px; resize: vertical; }
.theme-checks {
    display: flex; flex-wrap: wrap; gap: 8px;
    max-height: 152px; overflow: auto;
    padding: 12px;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    background: rgba(7, 11, 18, 0.45);
}
.theme-checks label {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--ink); cursor: pointer; font-size: 13px;
    background: rgba(62, 224, 196, 0.06);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    padding: 7px 12px;
    transition: border-color 0.2s ease;
}
.theme-checks label:hover { border-color: var(--cyan); }
.theme-checks input { width: auto; accent-color: var(--cyan); }
.contact-actions { display: flex; align-items: center; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.form-msg { min-height: 20px; font-size: 13px; color: var(--muted); }
.form-msg.is-ok { color: var(--cyan); }
.form-msg.is-err { color: var(--danger); }

/* per-theme password gate */
.gate {
    position: relative;
    z-index: 2;
    min-height: 100svh;
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
}
.gate-visual { position: relative; min-height: 100svh; overflow: hidden; }
.gate-visual img { width: 100%; height: 100%; object-fit: cover; object-position: top center; display: block; filter: saturate(0.9); }
.gate-visual-mask {
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(7, 11, 18, 0.45) 0%, rgba(7, 11, 18, 0.2) 40%, rgba(7, 11, 18, 0.96) 100%);
}
.gate-panel {
    display: grid; align-content: center;
    padding: calc(var(--nav-h) + 56px) 52px 64px;
    background: rgba(7, 11, 18, 0.9);
    border-left: 1px solid var(--line);
}
.gate-panel h1 { font-size: clamp(34px, 4.4vw, 54px); }
.gate-form { display: grid; gap: 16px; margin-top: 30px; max-width: 420px; }
.gate-contact { margin: 22px 0 0; color: var(--muted); font-size: 14px; }
.gate-contact a { color: var(--cyan); margin-left: 12px; white-space: nowrap; }
.gate-contact a:hover { text-decoration: underline; }

/* footer */
.footer {
    position: relative; z-index: 2;
    padding: 30px 0 52px; color: var(--muted); font-size: 13px;
    border-top: 1px solid var(--line-soft);
    display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}

/* scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (max-width: 1080px) {
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero { min-height: 0; padding: 32px 0 64px; }
    .frame { transform: none; }
    .frame:hover { transform: translateY(-4px); }
    .capline { grid-template-columns: 44px minmax(0, 1fr); gap: 8px 18px; }
    .capline p { grid-column: 2; }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
    .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .nav {
        display: none;
        position: absolute; top: var(--nav-h); left: 0; right: 0;
        padding: 18px 18px 24px;
        background: rgba(7, 11, 18, 0.97);
        border-bottom: 1px solid var(--line);
        flex-direction: column; align-items: flex-start; gap: 18px;
    }
    .nav.is-open { display: flex; }
    .stage-wrap, .contact-panel, .grid, .form-grid, .gate { grid-template-columns: 1fr; }
    .contact-aside { border-right: 0; border-bottom: 1px solid var(--line-soft); }
    .section { padding: 68px 0; }
    .stage { min-height: 300px; }
    .rail { grid-template-columns: 1fr 1fr; }
    .rail-more { grid-column: 1 / -1; }
    .gate-visual { min-height: 220px; }
    .gate-visual-mask { background: linear-gradient(180deg, rgba(7, 11, 18, 0.25), rgba(7, 11, 18, 0.95)); }
    .gate-panel { padding: 36px 20px 56px; border-left: 0; }
}
@media (max-width: 640px) {
    .rail { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .grid { gap: 22px; }
    .contact-aside, .contact-form { padding: 26px 20px; }
    .capline { padding: 22px 0; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
    .reveal { opacity: 1; transform: none; }
}