:root {
    --ink: #15162b;
    --ink-soft: #242748;
    --paper: #f7f8ff;
    --muted: #6d7195;
    --cyan: #4de1ff;
    --violet: #6955ff;
    --coral: #ff7a87;
    --lime: #b9f37c;
    --line: #e3e6f5;
    --shadow: 0 18px 50px rgba(26, 27, 68, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.shell { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: sticky; top: 0; z-index: 20;
    background: rgba(247, 248, 255, .92);
    border-bottom: 1px solid rgba(227, 230, 245, .9);
    backdrop-filter: blur(18px);
}
.nav-row { height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; letter-spacing: .06em; }
.brand img { width: 42px; height: 42px; }
.brand-word { font-size: 21px; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: 14px; color: var(--muted); }
.nav-links a { padding: 8px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); border-color: var(--violet); }
.menu-toggle { display: none; border: 0; background: transparent; font-size: 24px; color: var(--ink); }
.button {
    display: inline-flex; align-items: center; justify-content: center; gap: 9px;
    min-height: 44px; padding: 0 20px; border-radius: 12px; border: 1px solid transparent;
    font-weight: 800; font-size: 14px; transition: transform .2s, box-shadow .2s, background .2s;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(105, 85, 255, .2); }
.button-primary { color: #101126; background: var(--cyan); }
.button-dark { color: #fff; background: var(--ink); }
.button-ghost { color: var(--ink); border-color: var(--line); background: #fff; }
.hero { padding: 90px 0 78px; background: radial-gradient(circle at 84% 15%, rgba(77, 225, 255, .28), transparent 28%), linear-gradient(135deg, #f7f8ff 0%, #eff1ff 58%, #e8e9ff 100%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 66px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--violet); font-size: 12px; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 30px; height: 3px; border-radius: 4px; background: var(--coral); }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.02em; }
h1 { margin-top: 18px; max-width: 560px; font-size: clamp(38px, 5vw, 68px); }
.hero-copy { max-width: 560px; margin: 24px 0 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note { margin-top: 14px; color: var(--muted); font-size: 12px; }
.hero-art { position: relative; min-height: 390px; }
.hero-art::before { content: ""; position: absolute; inset: 18px 18px 18px 10px; border: 1px dashed rgba(105, 85, 255, .35); border-radius: 28px; transform: rotate(-4deg); }
.hero-panel { position: absolute; inset: 0 26px 0 48px; border-radius: 28px; background: var(--ink); box-shadow: var(--shadow); overflow: hidden; }
.panel-top { height: 54px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; border-bottom: 1px solid rgba(255,255,255,.11); color: #fff; }
.panel-dots { display: flex; gap: 6px; }
.panel-dots i { display: block; width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }
.panel-dots i:nth-child(2) { background: var(--cyan); }
.panel-dots i:nth-child(3) { background: var(--lime); }
.panel-title { font-size: 13px; font-weight: 800; }
.panel-body { padding: 24px; }
.panel-search { display: flex; align-items: center; gap: 9px; padding: 10px 13px; border-radius: 10px; color: #aeb5e1; background: #25294d; font-size: 12px; }
.panel-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.panel-card { min-height: 136px; padding: 12px; border-radius: 12px; background: linear-gradient(145deg, #373b6c, #202344); }
.panel-cover { height: 80px; border-radius: 8px; background: linear-gradient(135deg, var(--violet), var(--coral)); }
.panel-card:nth-child(2) .panel-cover { background: linear-gradient(135deg, var(--cyan), #5384ff); }
.panel-card:nth-child(3) .panel-cover { background: linear-gradient(135deg, var(--lime), #5dcfbc); }
.panel-card span { display: block; margin-top: 9px; color: #e3e7ff; font-size: 11px; }
.float-tag { position: absolute; display: flex; align-items: center; gap: 8px; padding: 11px 13px; border-radius: 14px; color: var(--ink); background: #fff; box-shadow: var(--shadow); font-size: 12px; font-weight: 800; }
.float-tag strong { font-size: 18px; }
.tag-one { top: 26px; right: 0; }
.tag-two { bottom: 22px; left: 0; }
.section { padding: 86px 0; }
.section-alt { background: #fff; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.section-kicker { color: var(--violet); font-size: 12px; font-weight: 900; letter-spacing: .14em; }
.section h2 { margin-top: 8px; font-size: clamp(28px, 4vw, 42px); }
.section-head p { max-width: 430px; margin: 0; color: var(--muted); font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-card { min-height: 194px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.feature-card:nth-child(2) { background: #f0fbff; }
.feature-card:nth-child(3) { background: #f4f1ff; }
.feature-card:nth-child(4) { background: #fff4f3; }
.feature-icon { display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 12px; color: var(--ink); background: var(--cyan); font-weight: 900; }
.feature-card:nth-child(3) .feature-icon { background: var(--violet); color: #fff; }
.feature-card:nth-child(4) .feature-icon { background: var(--coral); }
.feature-card h3 { margin-top: 18px; font-size: 18px; }
.feature-card p { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.showcase { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: center; }
.showcase-copy p { margin: 17px 0 0; color: var(--muted); }
.bullet-list { display: grid; gap: 12px; margin: 22px 0 0; padding: 0; list-style: none; }
.bullet-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
.bullet-list li::before { content: "↗"; display: inline-flex; width: 22px; height: 22px; align-items: center; justify-content: center; flex: 0 0 auto; border-radius: 7px; color: var(--ink); background: var(--lime); font-weight: 900; }
.screen-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: end; }
.screen { padding: 10px; border-radius: 22px; background: var(--ink); box-shadow: 0 18px 35px rgba(21,22,43,.18); }
.screen:nth-child(2) { transform: translateY(-24px); }
.screen img { width: 100%; max-width: 400px; border-radius: 15px; }
.stat-band { padding: 28px 0; color: #fff; background: var(--ink); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat strong { display: block; color: var(--cyan); font-size: 30px; line-height: 1; }
.stat span { display: block; margin-top: 8px; color: #c9ccea; font-size: 12px; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.path-card { position: relative; min-height: 210px; padding: 24px; border-radius: 18px; color: #fff; background: var(--ink-soft); overflow: hidden; }
.path-card::after { content: attr(data-num); position: absolute; right: 18px; bottom: -14px; color: rgba(255,255,255,.08); font-size: 100px; font-weight: 900; }
.path-card h3 { position: relative; z-index: 1; font-size: 21px; }
.path-card p { position: relative; z-index: 1; margin: 14px 0 20px; color: #c9ccea; font-size: 13px; }
.path-card a { position: relative; z-index: 1; color: var(--cyan); font-size: 13px; font-weight: 900; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.quote { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.quote p { margin: 0; font-size: 15px; }
.quote footer { margin-top: 18px; color: var(--muted); font-size: 12px; }
.download-band { padding: 64px 0; background: linear-gradient(100deg, #dffbff, #ece8ff 60%, #fff1ef); }
.download-box { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.download-box p { margin: 10px 0 0; color: var(--muted); }
.site-footer { padding: 38px 0 24px; color: #c9ccea; background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; }
.footer-brand { color: #fff; }
.footer-copy { margin: 14px 0 0; font-size: 13px; }
.footer-title { color: #fff; font-size: 13px; font-weight: 900; }
.footer-links { display: grid; gap: 7px; margin-top: 12px; font-size: 13px; }
.footer-links a:hover { color: var(--cyan); }
.disclaimer { margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); color: #a9afd4; font-size: 12px; }
.copyright { margin-top: 12px; color: #7f85ac; font-size: 12px; }
.page-hero { padding: 70px 0 62px; background: linear-gradient(135deg, #eef0ff, #f9fbff 55%, #e4fbff); }
.page-hero h1 { max-width: 760px; font-size: clamp(34px, 5vw, 56px); }
.page-hero p { max-width: 720px; margin: 18px 0 0; color: var(--muted); font-size: 16px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 42px; align-items: start; }
.article { padding: 34px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.article h2 { margin-top: 34px; font-size: 28px; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin-top: 24px; font-size: 19px; }
.article p { margin: 13px 0 0; color: #4f5377; }
.article ul, .article ol { margin: 15px 0 0; padding-left: 22px; color: #4f5377; }
.article li + li { margin-top: 7px; }
.article-note { margin: 20px 0; padding: 16px 18px; border-left: 4px solid var(--coral); border-radius: 0 12px 12px 0; color: #4c4264; background: #fff4f3; font-size: 14px; }
.side-nav { position: sticky; top: 104px; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.side-nav strong { font-size: 14px; }
.side-nav a { display: block; margin-top: 12px; color: var(--muted); font-size: 13px; }
.side-nav a:hover { color: var(--violet); }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 14px; background: #fff; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 18px 20px; list-style: none; font-weight: 900; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--violet); font-size: 20px; line-height: 1; }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 20px 18px; color: #585b7a; font-size: 14px; }
.table-wrap { overflow-x: auto; margin-top: 20px; }
.info-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.info-table th, .info-table td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: left; }
.info-table th { color: var(--ink); background: #f3f4ff; }
@media (max-width: 900px) {
    .hero-grid, .showcase, .article-layout { grid-template-columns: 1fr; }
    .hero-art { min-height: 360px; max-width: 600px; width: 100%; margin: 0 auto; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .screen-grid { max-width: 620px; margin: 0 auto; }
    .side-nav { position: static; }
}
@media (max-width: 680px) {
    .shell { width: min(100% - 28px, 1160px); }
    .nav-row { height: 68px; }
    .menu-toggle { display: block; }
    .nav-links { display: none; position: absolute; top: 68px; left: 14px; right: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: var(--shadow); }
    .nav-links.is-open { display: grid; gap: 4px; }
    .nav-links a { padding: 10px 8px; }
    .nav-links .button { width: 100%; }
    .hero { padding: 56px 0 54px; }
    h1 { font-size: 42px; }
    .hero-art { min-height: 300px; }
    .hero-panel { inset: 0 4px 0 18px; }
    .panel-body { padding: 17px; }
    .panel-card { min-height: 112px; }
    .panel-cover { height: 62px; }
    .section { padding: 62px 0; }
    .section-head, .download-box { align-items: flex-start; flex-direction: column; }
    .feature-grid, .path-grid, .quote-grid, .stats { grid-template-columns: 1fr; }
    .screen-grid { gap: 8px; }
    .screen { padding: 6px; border-radius: 15px; }
    .screen img { border-radius: 10px; }
    .footer-grid { grid-template-columns: 1fr; gap: 22px; }
    .article { padding: 22px; }
}