:root {
    --ink: #f4f7fb;
    --muted: #9ba8bd;
    --subtle: #6f7e96;
    --bg: #07101d;
    --bg-soft: #0b1728;
    --panel: rgba(15, 30, 50, 0.78);
    --panel-solid: #101f34;
    --line: rgba(159, 183, 214, 0.16);
    --brand: #28b8ff;
    --brand-strong: #0878f9;
    --blue: #72cfff;
    --orange: #f59e0b;
    --radius: 24px;
    --radius-sm: 14px;
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.3);
    --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 15% 0%, rgba(8, 120, 249, 0.16), transparent 26rem),
        radial-gradient(circle at 85% 14%, rgba(40, 184, 255, 0.12), transparent 24rem),
        var(--bg);
    font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .2;
    background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, black, transparent 80%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
button { color: inherit; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; padding: 10px 14px; background: white; color: #07101d; border-radius: 10px; }
.skip-link:focus { top: 12px; }

.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid transparent;
    background: rgba(7, 16, 29, .76);
    backdrop-filter: blur(18px);
    transition: border-color .2s ease, background .2s ease;
}
.navbar.scrolled { border-color: var(--line); background: rgba(7, 16, 29, .94); }
.nav-container { width: min(calc(100% - 40px), 1240px); min-height: 76px; margin: auto; display: flex; align-items: center; gap: 28px; }
.logo { display: inline-flex; align-items: center; flex: 0 0 auto; }
.logo img { width: auto; height: 38px; }
.nav-links { display: flex; align-items: center; gap: 24px; margin: 0 0 0 auto; padding: 0; list-style: none; }
.nav-links a { color: #b6c1d2; font-size: 14px; font-weight: 600; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after { content: ""; display: block; height: 2px; margin-top: 5px; border-radius: 2px; background: var(--brand); }
.nav-cta { margin-left: 4px; }
.menu-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: transparent; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: var(--ink); border-radius: 2px; }

.btn { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 0 19px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; font-weight: 750; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-2px); border-color: rgba(40,184,255,.5); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #20b7ff, var(--brand-strong)); border-color: transparent; box-shadow: 0 12px 32px rgba(8,120,249,.24); }
.btn-secondary { background: rgba(255,255,255,.035); }
.btn-link { padding: 0; min-height: auto; border: 0; color: var(--brand); border-radius: 0; }
.btn-link:hover { transform: none; color: #a5ddff; }

.hero { position: relative; overflow: hidden; padding: 112px 0 96px; }
.hero::after { content: "IP"; position: absolute; right: -1vw; top: 20px; color: rgba(255,255,255,.025); font-size: clamp(190px, 30vw, 460px); line-height: 1; font-weight: 900; letter-spacing: -.06em; pointer-events: none; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr); align-items: center; gap: 72px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 25px; height: 1px; background: currentColor; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 820px; margin: 20px 0 24px; font-size: clamp(44px, 6.3vw, 82px); line-height: 1.06; letter-spacing: -.055em; }
.gradient-text { background: linear-gradient(100deg, #fff 0%, #8bd6ff 45%, #4da2ff 100%); background-clip: text; -webkit-background-clip: text; color: transparent; }
.hero-lead { max-width: 700px; color: #b8c4d7; font-size: clamp(17px, 2vw, 21px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-note { margin-top: 20px; color: var(--subtle); font-size: 13px; }
.credential-badges { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 22px; }
.credential-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid rgba(40,184,255,.28); border-radius: 999px; color: #c9eaff; background: rgba(8,120,249,.09); font-size: 12px; font-weight: 750; }
.credential-badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 12px rgba(40,184,255,.65); }
.hero-panel { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(160deg, rgba(16,36,59,.92), rgba(9,21,37,.82)); box-shadow: var(--shadow); }
.hero-panel::before { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(135deg, rgba(40,184,255,.15), transparent 42%, rgba(8,120,249,.1)); pointer-events: none; }
.system-label { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; color: #dce5f2; font-weight: 750; }
.system-status { color: var(--brand); font-size: 12px; }
.system-flow { position: relative; display: grid; gap: 12px; }
.flow-node { display: grid; grid-template-columns: 44px 1fr; align-items: center; gap: 14px; padding: 15px; border: 1px solid var(--line); border-radius: 16px; background: rgba(3,10,20,.42); }
.flow-index { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 12px; color: #07101d; background: var(--brand); font-size: 12px; font-weight: 900; }
.flow-node strong { display: block; font-size: 14px; }
.flow-node small { display: block; color: var(--muted); margin-top: 2px; }

.proof-strip { border-block: 1px solid var(--line); background: rgba(255,255,255,.018); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-item { min-height: 120px; padding: 25px; border-right: 1px solid var(--line); }
.proof-item:last-child { border-right: 0; }
.proof-item strong { display: block; margin-bottom: 6px; color: #e8edf5; font-size: 15px; }
.proof-item span { color: var(--muted); font-size: 13px; }

.section { position: relative; padding: 104px 0; }
.section-alt { border-block: 1px solid var(--line); background: rgba(13,28,46,.48); }
.section-header { max-width: 760px; margin-bottom: 48px; }
.section-header.center { margin-inline: auto; text-align: center; }
.section-header.center .eyebrow { justify-content: center; }
.section-title { margin: 14px 0 17px; font-size: clamp(32px, 4vw, 52px); line-height: 1.14; letter-spacing: -.035em; }
.section-desc { color: var(--muted); font-size: 17px; }
.section-actions { margin-top: 28px; }

.grid-2, .grid-3, .grid-4 { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { position: relative; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: 0 16px 50px rgba(0,0,0,.12); }
.card::after { content: ""; position: absolute; width: 130px; height: 130px; right: -70px; bottom: -80px; border-radius: 50%; background: rgba(40,184,255,.09); filter: blur(4px); }
.card-kicker { color: var(--brand); font-size: 12px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.card h3 { margin: 12px 0 10px; font-size: 22px; letter-spacing: -.02em; }
.card p { color: var(--muted); }
.card .btn-link { position: relative; z-index: 2; margin-top: 10px; }
.card-featured { grid-column: span 2; background: linear-gradient(145deg, rgba(22,48,72,.92), rgba(13,30,48,.85)); }
.card-featured h3 { font-size: 28px; }
.keyword-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.keyword-tag { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: #adbbcf; background: rgba(255,255,255,.025); font-size: 12px; }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.step { counter-increment: step; padding: 24px; border-top: 1px solid rgba(40,184,255,.48); background: linear-gradient(to bottom, rgba(40,184,255,.065), transparent); }
.step::before { content: "0" counter(step); display: block; margin-bottom: 30px; color: var(--brand); font-size: 12px; font-weight: 900; }
.step h3 { margin-bottom: 8px; font-size: 18px; }
.step p { color: var(--muted); font-size: 14px; }

.split { display: grid; grid-template-columns: .92fr 1.08fr; align-items: start; gap: 72px; }
.sticky-copy { position: sticky; top: 120px; }
.list { margin: 0; padding: 0; list-style: none; }
.list li { position: relative; padding: 16px 0 16px 27px; border-bottom: 1px solid var(--line); color: #c0cadd; }
.list li::before { content: ""; position: absolute; left: 0; top: 27px; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 16px rgba(40,184,255,.58); }
.definition { padding: 26px 28px; border-left: 3px solid var(--brand); background: rgba(40,184,255,.06); color: #dbe8f5; font-size: 18px; }

.page-hero { padding: 92px 0 72px; border-bottom: 1px solid var(--line); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 25px; color: var(--subtle); font-size: 13px; }
.breadcrumb a:hover { color: var(--brand); }
.page-hero h1 { max-width: 940px; margin: 0 0 22px; font-size: clamp(40px, 6vw, 70px); line-height: 1.08; letter-spacing: -.05em; }
.page-lead { max-width: 780px; color: #b5c2d4; font-size: 19px; }
.page-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.feature-list { display: grid; gap: 14px; }
.feature-row { display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); }
.feature-no { display: grid; width: 50px; height: 50px; place-items: center; border: 1px solid rgba(40,184,255,.34); border-radius: 15px; color: var(--brand); font-weight: 900; }
.feature-row h3 { margin: 2px 0 6px; font-size: 18px; }
.feature-row p { margin-bottom: 0; color: var(--muted); }

.timeline { position: relative; margin-left: 10px; padding-left: 34px; border-left: 1px solid var(--line); }
.timeline-item { position: relative; padding: 0 0 38px; }
.timeline-item::before { content: ""; position: absolute; left: -41px; top: 7px; width: 13px; height: 13px; border-radius: 50%; background: var(--bg); border: 3px solid var(--brand); }
.timeline-year { color: var(--brand); font-size: 13px; font-weight: 850; letter-spacing: .08em; }
.timeline-item h3 { margin: 5px 0 6px; }
.timeline-item p { color: var(--muted); }

.cert-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin-top: 30px; }
.cert-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.cert-card img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; object-position: center; background: var(--panel); }
.cert-copy { padding: 22px; }
.cert-copy h3 { margin-bottom: 6px; }
.cert-copy p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.office-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.office-card { overflow: hidden; position: relative; min-height: 300px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.office-card img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; }
.office-caption { position: absolute; inset: auto 0 0; padding: 50px 20px 18px; background: linear-gradient(to top, rgba(3,10,20,.92), transparent); }
.office-caption strong { display: block; }
.office-caption span { color: #bdc9d9; font-size: 12px; }
.copyright-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.copyright-item { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.025); }
.copyright-item strong { font-size: 15px; }
.copyright-item span { flex: 0 0 auto; color: var(--subtle); font-size: 12px; text-align: right; }
.company-facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 32px; }
.company-fact { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.025); }
.company-fact strong { display: block; color: var(--brand); font-size: 19px; }
.company-fact span { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; }
.event-showcase { display: grid; gap: 22px; }
.event-figure { overflow: hidden; margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: 0 18px 54px rgba(0,0,0,.18); }
.event-figure img { width: 100%; height: auto; }
.event-copy { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; padding: 22px 26px; }
.event-copy h3 { margin: 0; font-size: 19px; }
.event-copy p { max-width: 720px; margin: 0; color: var(--muted); font-size: 14px; }

.faq-list { display: grid; gap: 12px; max-width: 900px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); }
.faq-question { width: 100%; padding: 20px 22px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border: 0; background: transparent; text-align: left; font-weight: 760; cursor: pointer; }
.faq-question::after { content: "+"; color: var(--brand); font-size: 24px; font-weight: 400; }
.faq-item.active .faq-question::after { content: "−"; }
.faq-answer { display: none; padding: 0 22px 20px; color: var(--muted); }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-item.active .faq-answer { display: block; }

.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.contact-card { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.contact-card small { display: block; color: var(--brand); font-weight: 750; }
.contact-card strong { display: block; margin-top: 8px; font-size: 18px; }
.copy-btn { margin-top: 14px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--muted); cursor: pointer; }

.cta-band { padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 28px; border: 1px solid rgba(40,184,255,.28); border-radius: 30px; background: linear-gradient(120deg, rgba(8,120,249,.15), rgba(40,184,255,.08)); }
.cta-band h2 { margin-bottom: 8px; font-size: clamp(28px, 4vw, 42px); }
.cta-band p { margin-bottom: 0; color: var(--muted); }
.cta-actions { display: flex; flex: 0 0 auto; gap: 10px; }

.footer { padding: 70px 0 26px; border-top: 1px solid var(--line); background: #050c16; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 42px; }
.footer-brand p { max-width: 330px; margin-top: 18px; color: var(--muted); }
.footer h3 { margin: 0 0 15px; font-size: 14px; }
.footer ul { margin: 0; padding: 0; list-style: none; }
.footer li { margin: 9px 0; }
.footer a { color: var(--muted); font-size: 13px; }
.footer a:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 54px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 12px; }
.footer-bottom a { font-size: inherit; color: inherit; text-decoration: none; }
.footer-bottom a:hover { color: var(--brand); }

.notice { padding: 16px 18px; border: 1px solid rgba(245,158,11,.22); border-radius: 14px; color: #d7c29a; background: rgba(245,158,11,.055); font-size: 13px; }
.empty-state { text-align: center; padding: 80px 20px; }
.empty-state strong { display: block; font-size: clamp(54px, 12vw, 120px); color: var(--brand); }

@media (max-width: 980px) {
    .nav-links, .nav-cta { display: none; }
    .menu-toggle { display: block; }
    .nav-links.active { position: absolute; left: 20px; right: 20px; top: 70px; display: grid; gap: 0; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: #0b1728; box-shadow: var(--shadow); }
    .nav-links.active a { display: block; padding: 12px; }
    .nav-links.active a.active::after { display: none; }
    .hero-grid, .split { grid-template-columns: 1fr; gap: 48px; }
    .hero-panel { max-width: 650px; }
    .sticky-copy { position: static; }
    .grid-4, .proof-grid, .office-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-grid > :last-child { display: none; }
    .company-facts { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
    .container, .nav-container { width: min(calc(100% - 28px), var(--container)); }
    .hero { padding: 78px 0 68px; }
    .hero h1 { font-size: clamp(41px, 13vw, 62px); }
    .hero-grid { gap: 42px; }
    .hero-panel { padding: 18px; border-radius: 22px; }
    .section { padding: 76px 0; }
    .page-hero { padding: 68px 0 56px; }
    .grid-2, .grid-3, .grid-4, .proof-grid, .steps, .contact-grid, .cert-grid, .copyright-grid, .company-facts, .office-grid { grid-template-columns: 1fr; }
    .card-featured { grid-column: auto; }
    .proof-item { border-right: 0; border-bottom: 1px solid var(--line); }
    .proof-item:last-child { border-bottom: 0; }
    .cta-band { padding: 30px 24px; align-items: flex-start; flex-direction: column; }
    .event-copy { flex-direction: column; gap: 8px; }
    .cta-actions { width: 100%; flex-direction: column; }
    .cta-actions .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}