:root {
    --ink: #f4f7ff;
    --muted: #a7b1cc;
    --subtle: #6d789c;
    --bg: #080c22;
    --panel: #111735;
    --panel-2: #161c43;
    --line: rgba(160, 174, 231, .18);
    --violet: #7867ff;
    --cyan: #70dcff;
    --gold: #ffc970;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: "Segoe UI", "Microsoft YaHei", sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(8, 12, 34, .86); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.nav-wrap { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-size: 18px; font-weight: 700; letter-spacing: .06em; }
.brand img { width: 38px; height: 38px; border-radius: 12px; }
.main-nav { display: flex; align-items: center; gap: 30px; color: var(--muted); font-size: 14px; }
.main-nav a { transition: color .2s ease; }
.main-nav a:hover, .main-nav a.active { color: var(--ink); }
.main-nav .nav-download { padding: 10px 18px; color: #10132d; background: var(--gold); border-radius: 6px; font-weight: 700; }
.nav-toggle { display: none; border: 0; background: none; color: var(--ink); font-size: 24px; }
.hero { min-height: 640px; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: 80px; padding-top: 58px; padding-bottom: 66px; }
.eyebrow { margin: 0 0 16px; color: var(--cyan); font-size: 11px; font-weight: 800; letter-spacing: .19em; }
.eyebrow-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 18px var(--gold); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 620px; margin-bottom: 22px; color: #fff; font-size: clamp(42px, 6vw, 72px); line-height: 1.12; letter-spacing: -.035em; }
h2 { margin-bottom: 15px; font-size: clamp(28px, 4vw, 44px); line-height: 1.2; letter-spacing: -.025em; }
h3 { margin-bottom: 8px; font-size: 20px; line-height: 1.3; }
.hero-intro, .page-hero > p:not(.eyebrow) { max-width: 620px; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 25px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 0 20px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #11142c; background: var(--gold); box-shadow: 0 12px 28px rgba(255, 201, 112, .16); }
.button-ghost { border-color: var(--line); color: var(--ink); background: rgba(255, 255, 255, .03); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 25px; color: var(--subtle); font-size: 12px; }
.hero-meta b { margin-right: 5px; color: var(--ink); }
.hero-art { position: relative; min-height: 490px; display: grid; place-items: center; }
.hero-art::before { content: ""; position: absolute; width: 380px; height: 380px; border-radius: 50%; background: radial-gradient(circle, rgba(120, 103, 255, .28), rgba(120, 103, 255, 0) 67%); }
.orbit { position: absolute; border: 1px solid rgba(112, 220, 255, .25); border-radius: 50%; transform: rotate(-25deg); }
.orbit-one { width: 440px; height: 180px; }
.orbit-two { width: 310px; height: 420px; transform: rotate(42deg); border-color: rgba(255, 201, 112, .24); }
.phone { position: relative; overflow: hidden; width: 246px; height: 480px; padding: 14px 13px 0; border: 7px solid #252b55; border-radius: 31px; background: #0d1230; box-shadow: 0 28px 70px rgba(0, 0, 0, .5), 0 0 0 1px rgba(255, 255, 255, .08); }
.phone::before { content: ""; position: absolute; top: 0; left: 50%; width: 88px; height: 18px; border-radius: 0 0 14px 14px; background: #252b55; transform: translateX(-50%); }
.phone-top, .phone-title, .screen-tabs, .phone-bottom { display: flex; align-items: center; justify-content: space-between; }
.phone-top { margin: 2px 6px 24px; font-size: 9px; color: var(--muted); }
.phone-title { margin: 0 4px 16px; font-size: 13px; font-weight: 700; }
.phone-title span { color: var(--cyan); font-size: 18px; }
.screen-banner { min-height: 143px; padding: 16px 14px; display: flex; flex-direction: column; justify-content: end; border-radius: 11px; background: linear-gradient(145deg, #313d8e, #613d9b 58%, #d07b93); }
.screen-banner span, .screen-banner small { color: #cad6ff; font-size: 9px; }
.screen-banner strong { margin: 3px 0; font-size: 19px; }
.screen-tabs { margin: 18px 3px 10px; color: var(--subtle); font-size: 10px; }
.screen-tabs b { color: var(--gold); }
.poster-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.poster { display: block; aspect-ratio: .72; border-radius: 5px; background: linear-gradient(160deg, #5369be, #21183e 70%); }
.poster-b { background: linear-gradient(160deg, #d58b91, #302652 72%); }
.poster-c { background: linear-gradient(160deg, #5fc0d0, #162851 72%); }
.phone-bottom { position: absolute; right: 13px; bottom: 14px; left: 13px; padding: 13px 10px 8px; border-top: 1px solid rgba(255, 255, 255, .12); color: var(--subtle); font-size: 14px; }
.phone-bottom .selected { color: var(--gold); }
.orbit-label { position: absolute; right: 5%; bottom: 8%; color: var(--subtle); font-size: 10px; letter-spacing: .17em; }
.orbit-label span { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--cyan); }
.signal-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(23, 29, 68, .55); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); padding: 24px 0; }
.signal-grid div { padding: 0 26px; border-left: 1px solid var(--line); }
.signal-grid div:first-child { padding-left: 0; border-left: 0; }
.signal-grid strong, .signal-grid span { display: block; }
.signal-grid strong { margin-bottom: 2px; font-size: 14px; }
.signal-grid span { color: var(--subtle); font-size: 11px; }
.section { padding: 116px 0; }
.section-heading { margin-bottom: 42px; }
.heading-line { display: block; width: 55px; height: 3px; margin-top: 23px; background: var(--gold); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
.feature-card { position: relative; min-height: 260px; padding: 25px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.feature-card p { color: var(--muted); font-size: 13px; }
.feature-card-a { background: linear-gradient(150deg, #1a2250, #10152e); }
.feature-card-b { background: linear-gradient(150deg, #172e47, #11152d); }
.feature-card-c { background: linear-gradient(150deg, #30214e, #12162f); }
.feature-card-d { background: linear-gradient(150deg, #3b2d43, #15162d); }
.card-index { color: var(--cyan); font-size: 11px; letter-spacing: .1em; }
.feature-icon { position: absolute; right: 22px; bottom: 18px; color: rgba(255, 201, 112, .82); font-size: 54px; line-height: 1; }
.section-showcase { background: #0d1230; }
.showcase-wrap .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 25px; }
.showcase-wrap .heading-line { margin: 0 0 8px; }
.showcase-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 18px; align-items: end; }
.shot { margin: 0; }
.shot img { width: min(100%, 400px); max-height: 480px; margin: 0 auto; object-fit: cover; border: 1px solid var(--line); border-radius: 10px; }
.shot-large img { max-height: 500px; }
.shot figcaption { display: flex; justify-content: space-between; gap: 12px; padding-top: 14px; font-size: 13px; }
.shot figcaption span { color: var(--subtle); font-size: 11px; text-align: right; }
.quote-section { max-width: 790px; text-align: center; }
.quote-mark { color: var(--gold); font: 90px Georgia, serif; line-height: .6; }
blockquote { margin: 22px 0 12px; font-size: clamp(22px, 3vw, 31px); line-height: 1.55; }
cite { color: var(--subtle); font-size: 12px; font-style: normal; }
.text-link { display: inline-block; margin-top: 35px; color: var(--cyan); font-size: 13px; }
.site-footer { border-top: 1px solid var(--line); background: #070a1d; }
.footer-top { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { font-size: 15px; }
.footer-brand img { width: 30px; height: 30px; border-radius: 9px; }
.footer-links { display: flex; gap: 24px; color: var(--muted); font-size: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0 24px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 11px; }
.page-hero { padding: 100px 0 80px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 760px; margin-bottom: 18px; font-size: clamp(40px, 6vw, 64px); }
.page-hero .button { margin-top: 26px; }
.guide-layout, .faq-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 80px; }
.step-list { list-style: none; margin: 0; padding: 0; }
.step-list li { display: grid; grid-template-columns: 60px 1fr; gap: 18px; padding: 26px 0; border-top: 1px solid var(--line); }
.step-number { color: var(--gold); font-size: 13px; letter-spacing: .12em; }
.step-list h3 { margin-bottom: 7px; font-size: 18px; }
.step-list p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.guide-aside, .faq-aside { display: flex; flex-direction: column; gap: 18px; }
.aside-card, .rating-card { padding: 25px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.aside-kicker { display: block; margin-bottom: 15px; color: var(--cyan); font-size: 10px; letter-spacing: .18em; }
.aside-card h3 { margin-bottom: 15px; }
.aside-card ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 13px; }
.aside-card li + li { margin-top: 8px; }
.aside-shot { margin: 0; }
.aside-shot img { width: min(100%, 320px); max-height: 390px; margin: 0 auto; object-fit: cover; border: 1px solid var(--line); border-radius: 8px; }
.aside-shot figcaption { margin-top: 9px; color: var(--subtle); font-size: 11px; }
.section-note { background: linear-gradient(100deg, #111737, #191536); }
.note-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: center; }
.note-grid p:last-child { margin: 0; color: var(--muted); font-size: 15px; }
.faq-layout { align-items: start; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 0; cursor: pointer; list-style: none; font-size: 15px; font-weight: 600; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--gold); font-size: 22px; font-weight: 400; }
.faq-list details p { max-width: 760px; margin: -3px 35px 20px 0; color: var(--muted); font-size: 13px; }
.rating-card strong { display: block; color: #fff; font-size: 47px; line-height: 1; }
.rating-card strong span { color: var(--subtle); font-size: 16px; }
.stars { margin: 10px 0 6px; color: var(--gold); letter-spacing: .17em; }
.rating-card p { margin: 0; color: var(--subtle); font-size: 12px; }
.full-button { width: 100%; }

@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; gap: 15px; padding-top: 70px; }
    .hero-art { min-height: 470px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .signal-grid { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
    .signal-grid div:nth-child(3) { padding-left: 0; border-left: 0; }
    .showcase-grid { grid-template-columns: repeat(2, 1fr); }
    .shot-large { grid-column: span 2; }
    .guide-layout, .faq-layout { grid-template-columns: 1fr; gap: 55px; }
    .guide-aside, .faq-aside { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }
    .faq-aside .full-button { grid-column: span 2; }
    .note-grid { grid-template-columns: 1fr; gap: 25px; }
}
@media (max-width: 620px) {
    .container { width: min(var(--max), calc(100% - 32px)); }
    .nav-wrap { min-height: 68px; }
    .nav-toggle { display: block; }
    .main-nav { position: absolute; top: 68px; right: 16px; left: 16px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #111632; box-shadow: 0 20px 40px rgba(0, 0, 0, .3); }
    .main-nav.is-open { display: flex; }
    .main-nav a { padding: 12px 14px; }
    .main-nav .nav-download { margin-top: 6px; text-align: center; }
    .hero { min-height: auto; padding: 60px 0 30px; }
    h1 { font-size: 43px; }
    .hero-art { min-height: 420px; transform: scale(.86); transform-origin: top center; margin-bottom: -40px; }
    .signal-grid { grid-template-columns: 1fr; }
    .signal-grid div, .signal-grid div:nth-child(3) { padding: 0; border-left: 0; }
    .section { padding: 78px 0; }
    .feature-grid { grid-template-columns: 1fr; }
    .showcase-wrap .section-heading { display: block; }
    .showcase-wrap .heading-line { margin-top: 20px; }
    .showcase-grid { grid-template-columns: 1fr; }
    .shot-large { grid-column: auto; }
    .guide-aside, .faq-aside { display: flex; }
    .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; }
    .footer-links { flex-wrap: wrap; gap: 14px; }
    .page-hero { padding: 70px 0 55px; }
    .page-hero h1 { font-size: 42px; }
}