:root {
    --bg: #050710;
    --panel: rgba(12, 18, 38, 0.78);
    --panel-strong: rgba(19, 28, 58, 0.92);
    --text: #edf5ff;
    --muted: #9fb4d8;
    --line: rgba(124, 204, 255, 0.22);
    --cyan: #36e4ff;
    --blue: #4b7dff;
    --purple: #a85cff;
    --pink: #ff5edb;
    --green: #54f2c9;
    --shadow: 0 24px 80px rgba(18, 88, 180, 0.28);
    --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 5%, rgba(74, 96, 255, 0.28), transparent 32rem),
        radial-gradient(circle at 82% 10%, rgba(168, 92, 255, 0.20), transparent 34rem),
        radial-gradient(circle at 50% 90%, rgba(54, 228, 255, 0.12), transparent 32rem),
        var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
}
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 78%);
    z-index: -1;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: rgba(5, 7, 16, 0.76);
    border-bottom: 1px solid var(--line);
}
.nav-wrap {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand, .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: .05em;
    font-size: 1.18rem;
}
.brand-orb {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-block;
    background: radial-gradient(circle at 35% 30%, #fff, var(--cyan) 22%, var(--blue) 50%, var(--purple) 76%);
    box-shadow: 0 0 26px rgba(54, 228, 255, .58), inset 0 0 18px rgba(255,255,255,.25);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
    color: var(--muted);
    padding: 10px 12px;
    border-radius: 999px;
    font-size: .94rem;
    transition: .25s ease;
}
.nav-links a:hover, .nav-links a.active {
    color: #fff;
    background: rgba(83, 137, 255, .16);
    box-shadow: inset 0 0 0 1px rgba(54, 228, 255, .22);
}
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255,255,255,.04);
    color: #fff;
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    margin: 5px auto;
}

main { width: 100%; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 88px 0; position: relative; }
.section.tight { padding: 56px 0; }
.section-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
    gap: 36px;
    align-items: end;
    margin-bottom: 34px;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    margin-bottom: 16px;
    padding: 8px 13px;
    border: 1px solid rgba(54, 228, 255, .28);
    border-radius: 999px;
    color: #c9f8ff;
    background: rgba(54, 228, 255, .08);
    font-size: .9rem;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 15px var(--cyan); }
h1, h2, h3, p { margin-top: 0; }
h1 {
    font-size: clamp(2.35rem, 7vw, 5.8rem);
    line-height: 1.02;
    letter-spacing: -.07em;
    margin-bottom: 22px;
}
h2 {
    font-size: clamp(1.9rem, 4vw, 3.2rem);
    line-height: 1.12;
    letter-spacing: -.04em;
    margin-bottom: 14px;
}
h3 { font-size: 1.22rem; margin-bottom: 10px; }
p { color: var(--muted); }
.lead { font-size: clamp(1.05rem, 1.8vw, 1.26rem); color: #c4d4f4; max-width: 760px; }
.gradient-text {
    background: linear-gradient(100deg, #fff 10%, var(--cyan), var(--purple) 78%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero { padding: 86px 0 52px; }
.hero-grid {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    gap: 42px;
    align-items: center;
}
.hero-copy { position: relative; z-index: 2; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 20px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.16);
    color: #fff;
    background: rgba(255,255,255,.06);
    transition: .24s ease;
}
.btn.primary {
    border: none;
    background: linear-gradient(100deg, var(--blue), var(--purple), var(--pink));
    box-shadow: 0 18px 38px rgba(102, 92, 255, .35);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(54, 228, 255, .18); }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-badges span, .tag {
    display: inline-flex;
    align-items: center;
    padding: 7px 11px;
    border-radius: 999px;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.1);
    color: #dbe9ff;
    font-size: .92rem;
}
.hero-visual {
    position: relative;
    border-radius: var(--radius);
    padding: 14px;
    background: linear-gradient(145deg, rgba(54, 228, 255, .20), rgba(168, 92, 255, .18));
    box-shadow: var(--shadow);
}
.hero-visual::before, .hero-visual::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    filter: blur(4px);
    opacity: .9;
}
.hero-visual::before { width: 180px; height: 3px; right: 12%; top: 11%; background: var(--cyan); box-shadow: 0 0 25px var(--cyan); animation: slideLine 5.5s linear infinite; }
.hero-visual::after { width: 110px; height: 110px; left: -28px; bottom: 12%; background: rgba(168, 92, 255, .38); filter: blur(30px); }
.hero-visual img { border-radius: calc(var(--radius) - 8px); width: 100%; }

@keyframes slideLine {
    0% { transform: translateX(-70px); opacity: .3; }
    50% { transform: translateX(60px); opacity: 1; }
    100% { transform: translateX(-70px); opacity: .3; }
}

.grid-3, .grid-4, .grid-2 { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature-card, .metric-card, .image-card, .panel, .step-card, .faq-item, .video-card {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(15, 24, 52, .82), rgba(8, 12, 26, .78));
    border-radius: 24px;
    box-shadow: 0 18px 55px rgba(0, 0, 0, .22);
}
.feature-card { padding: 26px; min-height: 226px; position: relative; overflow: hidden; }
.feature-card::after {
    content: "";
    position: absolute;
    width: 160px;
    height: 160px;
    right: -70px;
    top: -80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(54, 228, 255, .22), transparent 68%);
}
.card-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    margin-bottom: 20px;
    border-radius: 16px;
    background: rgba(54, 228, 255, .12);
    color: var(--cyan);
    border: 1px solid rgba(54, 228, 255, .24);
    font-size: 1.25rem;
}
.metric-card { padding: 24px; }
.metric-card span { color: var(--muted); font-size: .92rem; }
.metric-card strong { display: block; margin: 6px 0 8px; font-size: 2.1rem; line-height: 1; color: #fff; }
.metric-card p { margin-bottom: 0; font-size: .95rem; }
.image-card { overflow: hidden; }
.image-card div { padding: 22px; }
.image-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #0b1022; }
.panel { padding: 28px; }
.panel.large { padding: 34px; }
.panel-glow { position: relative; overflow: hidden; }
.panel-glow::before {
    content: "";
    position: absolute;
    inset: -1px;
    background: linear-gradient(120deg, transparent, rgba(54, 228, 255, .12), transparent, rgba(168, 92, 255, .14));
    pointer-events: none;
}

.marquee {
    display: flex;
    gap: 14px;
    overflow: hidden;
    border-block: 1px solid var(--line);
    background: rgba(255,255,255,.035);
    padding: 16px 0;
}
.marquee-track { display: flex; gap: 14px; min-width: max-content; animation: moveTrack 28s linear infinite; }
.marquee span { color: #d7e6ff; padding: 7px 14px; border-radius: 999px; background: rgba(54, 228, 255, .07); border: 1px solid rgba(54, 228, 255, .18); }
@keyframes moveTrack { to { transform: translateX(-50%); } }

.timeline { display: grid; gap: 16px; counter-reset: steps; }
.step-card { padding: 24px; display: grid; grid-template-columns: 56px 1fr; gap: 18px; align-items: start; }
.step-card::before {
    counter-increment: steps;
    content: "0" counter(steps);
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    color: #fff;
    font-weight: 800;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 34px;
    align-items: center;
}
.list-check { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.list-check li { color: #d8e8ff; display: flex; gap: 10px; align-items: flex-start; }
.list-check li::before { content: "✓"; color: var(--green); font-weight: 800; }

.video-card { overflow: hidden; position: relative; }
.video-thumb { position: relative; }
.video-thumb::after {
    content: "▶";
    position: absolute;
    inset: 0;
    margin: auto;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(255,255,255,.92);
    color: #0b1022;
    box-shadow: 0 0 34px rgba(54, 228, 255, .4);
}
.video-card img { aspect-ratio: 16 / 9; width: 100%; object-fit: cover; }
.video-card div:last-child { padding: 22px; }

.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 22px 24px; }
.faq-item h3 { display: flex; align-items: center; justify-content: space-between; cursor: pointer; margin-bottom: 0; }
.faq-item h3::after { content: "+"; color: var(--cyan); font-size: 1.4rem; }
.faq-item.open h3::after { content: "−"; }
.faq-item p { display: none; margin: 12px 0 0; }
.faq-item.open p { display: block; }

.cta-band {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    border: 1px solid rgba(54, 228, 255, .25);
    border-radius: 32px;
    padding: clamp(28px, 5vw, 56px);
    background:
        linear-gradient(110deg, rgba(54, 228, 255, .14), rgba(168, 92, 255, .14)),
        rgba(9, 14, 32, .86);
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}
.cta-band::after {
    content: "";
    position: absolute;
    width: 380px;
    height: 380px;
    right: -160px;
    top: -170px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,94,219,.2), transparent 70%);
}
.contact-box { display: grid; gap: 16px; }
.contact-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.045);
}
.domain-pill { color: #fff; display: inline-flex; width: fit-content; padding: 8px 12px; border-radius: 999px; background: rgba(54,228,255,.12); border: 1px solid rgba(54,228,255,.28); word-break: break-all; }
.muted { color: var(--muted); font-size: .94rem; }

.site-footer {
    margin-top: 64px;
    border-top: 1px solid var(--line);
    background: rgba(2, 4, 10, .72);
    padding: 48px 0;
}
.footer-grid {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr .8fr .9fr .8fr;
    gap: 28px;
}
.footer-grid a, .footer-grid span { display: block; margin-top: 9px; color: #dbe8ff; }
.footer-grid strong { color: #fff; }
.footer-brand { margin-bottom: 12px; }

@media (max-width: 980px) {
    .nav-toggle { display: block; }
    .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 76px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: rgba(8, 13, 28, .96);
        box-shadow: var(--shadow);
    }
    .nav-links.open { display: flex; }
    .hero-grid, .section-head, .split { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .section { padding: 62px 0; }
    .hero { padding-top: 58px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; }
    .step-card { grid-template-columns: 1fr; }
    .contact-row { flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; }
    h1 { font-size: clamp(2.35rem, 14vw, 4.5rem); }
}