:root {
    --ink: #0b1020;
    --panel: #111a2e;
    --panel-2: #17223a;
    --line: rgba(220, 235, 255, .14);
    --text: #f4f8ff;
    --muted: #a8b5cb;
    --cyan: #55e4ff;
    --violet: #8876ff;
    --coral: #ff9a9f;
    --lime: #b6ef88;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--ink);
    color: var(--text);
    font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.shell { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.topline { height: 4px; background: linear-gradient(90deg, var(--cyan), var(--violet), var(--coral)); }
.site-header {
    position: sticky; top: 0; z-index: 10;
    background: rgba(11, 16, 32, .92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}
.nav { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .02em; }
.brand img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 0 0 1px rgba(255,255,255,.18); }
.brand span { font-size: 1.12rem; }
.nav-links { display: flex; align-items: center; gap: 26px; color: var(--muted); font-size: .94rem; }
.nav-links a { transition: color .2s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-download { padding: 9px 16px; border: 1px solid rgba(85,228,255,.45); border-radius: 999px; color: var(--cyan) !important; }
.menu-toggle { display: none; border: 1px solid var(--line); background: transparent; color: var(--text); padding: 7px 10px; border-radius: 8px; font-size: 1.15rem; }
.hero { padding: 82px 0 68px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(330px, .95fr); gap: 74px; align-items: center; }
.eyebrow { margin: 0 0 16px; color: var(--cyan); font-size: .78rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 700; }
h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -.02em; }
h1 { font-size: clamp(2.5rem, 7vw, 5.4rem); max-width: 720px; }
.hero-copy { color: var(--muted); font-size: 1.1rem; max-width: 600px; margin: 24px 0 30px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button { display: inline-flex; align-items: center; gap: 9px; padding: 13px 20px; border-radius: 10px; border: 1px solid transparent; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #07111f; background: var(--cyan); box-shadow: 0 10px 28px rgba(85,228,255,.2); }
.button-secondary { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.04); }
.button-ghost { border-color: rgba(136,118,255,.5); color: #d4ceff; background: rgba(136,118,255,.08); }
.micro-note { margin: 12px 0 0; color: #7f8da7; font-size: .82rem; }
.hero-art { position: relative; min-height: 470px; display: grid; place-items: center; }
.orbit { position: absolute; width: 360px; height: 360px; border: 1px solid rgba(85,228,255,.24); border-radius: 50%; box-shadow: 0 0 90px rgba(136,118,255,.17); }
.orbit::before, .orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,154,159,.2); }
.orbit::before { inset: 36px; }
.orbit::after { inset: 74px; }
.screen-frame { position: relative; width: min(290px, 76vw); padding: 9px; border-radius: 28px; background: #202c48; border: 1px solid rgba(255,255,255,.22); transform: rotate(5deg); box-shadow: 24px 26px 0 rgba(136,118,255,.14), 0 30px 70px rgba(0,0,0,.45); }
.screen-frame img { width: 100%; border-radius: 20px; max-height: 520px; object-fit: cover; object-position: top; }
.tag { position: absolute; display: inline-flex; align-items: center; gap: 7px; padding: 9px 12px; border-radius: 9px; background: rgba(11,16,32,.88); border: 1px solid var(--line); color: var(--text); font-size: .78rem; box-shadow: 0 12px 22px rgba(0,0,0,.22); }
.tag-a { top: 18%; right: 0; color: var(--lime); }
.tag-b { bottom: 16%; left: 2%; color: var(--coral); }
.signal-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.signals { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal { padding: 22px 18px; border-right: 1px solid var(--line); }
.signal:last-child { border-right: 0; }
.signal strong { display: block; font-size: 1.45rem; }
.signal span { color: var(--muted); font-size: .82rem; }
.section { padding: 88px 0; }
.section-head { display: flex; justify-content: space-between; gap: 28px; align-items: end; margin-bottom: 30px; }
.section-head h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
.section-head p { color: var(--muted); max-width: 440px; margin: 0; }
.kicker { color: var(--coral); font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; font-weight: 700; margin-bottom: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { min-height: 230px; padding: 24px; background: linear-gradient(145deg, rgba(23,34,58,.92), rgba(17,26,46,.9)); border: 1px solid var(--line); border-radius: 12px; position: relative; overflow: hidden; }
.feature::after { content: ""; position: absolute; width: 110px; height: 110px; border-radius: 50%; right: -36px; bottom: -36px; border: 1px solid rgba(85,228,255,.16); }
.feature-index { color: var(--cyan); font: 700 .8rem/1 "Consolas", monospace; }
.feature h3 { margin: 20px 0 10px; font-size: 1.22rem; }
.feature p { color: var(--muted); margin: 0; font-size: .93rem; }
.split { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 64px; align-items: center; }
.dark-band { background: #0d1528; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.visual-stage { display: grid; grid-template-columns: minmax(0, .65fr) minmax(0, 1.35fr); gap: 28px; align-items: center; }
.visual-copy { padding: 28px; border-left: 2px solid var(--coral); background: rgba(255,154,159,.05); }
.visual-copy h2 { font-size: 2.3rem; margin-bottom: 18px; }
.visual-copy p { color: var(--muted); margin: 0 0 18px; }
.screen-large { justify-self: center; width: min(400px, 100%); padding: 10px; border-radius: 18px; background: #1c2945; border: 1px solid rgba(255,255,255,.18); box-shadow: 0 26px 60px rgba(0,0,0,.35); }
.screen-large img { width: 100%; max-width: 400px; border-radius: 12px; }
.link-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.link-chip { color: var(--cyan); border-bottom: 1px solid rgba(85,228,255,.4); padding-bottom: 2px; }
.path-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.path-card { min-height: 210px; border: 1px solid var(--line); border-radius: 12px; padding: 26px; background: radial-gradient(circle at 100% 0, rgba(136,118,255,.16), transparent 44%), var(--panel); }
.path-card h3 { font-size: 1.35rem; margin-bottom: 11px; }
.path-card p { margin: 0 0 17px; color: var(--muted); }
.testimonial { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; align-items: stretch; }
.quote { padding: 28px; background: var(--panel-2); border-radius: 12px; border: 1px solid var(--line); }
.quote p { font-size: 1.12rem; margin: 0 0 20px; }
.quote cite { color: var(--cyan); font-size: .9rem; font-style: normal; }
.mini-stack { display: grid; gap: 12px; }
.mini-stat { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 18px 20px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.035); }
.mini-stat span { color: var(--muted); font-size: .88rem; }
.mini-stat strong { color: var(--lime); }
.cta-band { padding: 52px 0; background: linear-gradient(110deg, rgba(85,228,255,.14), rgba(136,118,255,.16)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cta-inner { display: flex; justify-content: space-between; gap: 24px; align-items: center; }
.cta-inner h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); }
.cta-inner p { color: var(--muted); margin: 8px 0 0; }
.article-hero { padding: 72px 0 45px; border-bottom: 1px solid var(--line); }
.article-hero h1 { max-width: 800px; font-size: clamp(2.4rem, 6vw, 4.8rem); }
.article-hero .hero-copy { max-width: 740px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 50px; align-items: start; }
.article-body { max-width: 780px; }
.article-body h2 { font-size: 2rem; margin: 48px 0 18px; }
.article-body h3 { font-size: 1.25rem; margin: 24px 0 8px; color: var(--cyan); }
.article-body p { color: #c7d2e4; margin: 0 0 16px; }
.article-body ul, .article-body ol { color: #c7d2e4; padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.aside-card { position: sticky; top: 105px; padding: 22px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.aside-card h3 { font-size: 1rem; margin-bottom: 13px; }
.aside-card a { display: block; color: var(--muted); padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.07); font-size: .9rem; }
.aside-card a:last-child { border-bottom: 0; }
.step-list { display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 21px 0; border-bottom: 1px solid var(--line); }
.step:last-child { border-bottom: 0; }
.step-no { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: rgba(85,228,255,.12); color: var(--cyan); font: 700 1rem/1 "Consolas", monospace; }
.step h3 { margin: 0 0 6px; color: var(--text); }
.step p { margin: 0; }
.notice { padding: 18px 20px; border-left: 3px solid var(--lime); background: rgba(182,239,136,.07); color: #dceacb; margin: 22px 0; }
.faq-list { display: grid; gap: 10px; }
details { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 0 18px; }
summary { cursor: pointer; padding: 17px 2px; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--cyan); font-size: 1.2rem; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); padding: 0 2px 17px; margin: 0; }
.site-footer { padding: 40px 0 32px; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.footer-brand { color: var(--text); margin-bottom: 12px; }
.footer-grid p { margin: 0; max-width: 600px; font-size: .88rem; }
.footer-links { display: flex; justify-content: flex-end; gap: 20px; align-items: start; flex-wrap: wrap; font-size: .88rem; }
.copyright { display: flex; justify-content: space-between; gap: 16px; padding-top: 20px; font-size: .78rem; }
.reveal { opacity: 1; transform: none; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 860px) {
    .shell { width: min(var(--max), calc(100% - 28px)); }
    .nav { min-height: 68px; }
    .menu-toggle { display: block; }
    .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 14px 20px 20px; background: #0b1020; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; }
    .nav-links.is-open { display: flex; }
    .nav-links a { padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
    .nav-download { text-align: center; margin-top: 10px; }
    .hero { padding-top: 56px; }
    .hero-grid, .split, .visual-stage, .article-layout, .testimonial { grid-template-columns: 1fr; gap: 36px; }
    .hero-art { min-height: 390px; }
    .signals { grid-template-columns: repeat(2, 1fr); }
    .signal:nth-child(2) { border-right: 0; }
    .signal:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 64px 0; }
    .section-head { display: block; }
    .section-head p { margin-top: 12px; }
    .aside-card { position: static; }
    .footer-grid { grid-template-columns: 1fr; gap: 20px; }
    .footer-links { justify-content: flex-start; }
}
@media (max-width: 560px) {
    h1 { font-size: 2.55rem; }
    .feature-grid, .path-grid { grid-template-columns: 1fr; }
    .screen-frame { width: min(250px, 70vw); }
    .orbit { width: 290px; height: 290px; }
    .tag-a { right: -4px; }
    .tag-b { left: -6px; }
    .cta-inner { align-items: flex-start; flex-direction: column; }
    .copyright { flex-direction: column; }
}