:root {
  --ink: #081120;
  --ink-2: #101c34;
  --paper: #f5f7fb;
  --white: #fff;
  --muted: #6b768b;
  --line: rgba(12, 24, 46, .11);
  --blue: #5b55f6;
  --blue-2: #7657ff;
  --cyan: #19bff5;
  --green: #17b890;
  --orange: #ff8a39;
  --plum: #7d375f;
  --radius: 24px;
  --shadow: 0 22px 70px rgba(12, 27, 60, .12);
  --content: min(1180px, calc(100vw - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }
.wrap { width: var(--content); margin-inline: auto; }
.section { padding: 112px 0; position: relative; overflow: hidden; }
.section-sm { padding: 78px 0; }
.section-dark { color: #fff; background: var(--ink); }
.section-ink { color: #fff; background: linear-gradient(135deg, #07101e 0%, #111f3d 62%, #171433 100%); }
.section-white { background: #fff; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px; margin-bottom: 20px;
  color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: currentColor; border-radius: 2px; }
.section-dark .eyebrow, .section-ink .eyebrow { color: #66dcff; }
.section-title { margin: 0; max-width: 790px; font-size: clamp(34px, 4.5vw, 62px); line-height: 1.08; letter-spacing: -.045em; }
.section-title em { color: var(--blue); font-style: normal; }
.section-dark .section-title em, .section-ink .section-title em { color: #77ddff; }
.section-lead { max-width: 760px; margin: 24px 0 0; color: var(--muted); font-size: 18px; line-height: 1.85; }
.section-dark .section-lead, .section-ink .section-lead { color: #aebbd0; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 52px; }
.section-head .link-arrow { flex: 0 0 auto; }
.link-arrow { display: inline-flex; align-items: center; gap: 10px; color: var(--blue); font-weight: 750; }
.link-arrow span { transition: transform .2s ease; }
.link-arrow:hover span { transform: translateX(5px); }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: 999px; background: rgba(91,85,246,.09); color: var(--blue); font-size: 12px; font-weight: 750; }
.tag-warm { color: #c96118; background: #fff0e3; }
.tag-green { color: #08795f; background: #ddf9f0; }
.tag-dark { color: #fff; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.14); }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn {
  min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 0 22px; border-radius: 999px; border: 1px solid transparent; font-weight: 760;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--blue), #7a54ff); box-shadow: 0 14px 30px rgba(91,85,246,.25); }
.btn-secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.btn-ghost { color: #fff; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); }
.btn-dark { color: #fff; background: var(--ink); }
.text-cyan { color: #62dcff; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(21,37,68,.05); }
.icon-box { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; color: var(--blue); background: rgba(91,85,246,.1); font-size: 22px; }
.notice { padding: 16px 18px; border-radius: 16px; background: #fff8e7; color: #7a5621; font-size: 13px; line-height: 1.65; }

/* header */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50; height: 72px;
  color: #fff; transition: background .25s ease, box-shadow .25s ease, color .25s ease;
}
.site-header.scrolled { color: var(--ink); background: rgba(255,255,255,.93); backdrop-filter: blur(18px); box-shadow: 0 8px 30px rgba(10,25,55,.08); }
.nav-wrap { width: min(1320px, calc(100vw - 34px)); height: 100%; margin: auto; display: flex; align-items: center; gap: 30px; }
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; font-size: 18px; font-weight: 900; letter-spacing: -.03em; white-space: nowrap; }
.brand-mark { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; }
.brand small { display: block; margin-top: 2px; opacity: .65; font-weight: 600; font-size: 9px; letter-spacing: .08em; }
.main-nav { display: flex; align-items: center; gap: 26px; font-size: 14px; font-weight: 700; }
.main-nav a { opacity: .76; transition: opacity .2s ease; white-space: nowrap; }
.main-nav a:hover, .main-nav a.active { opacity: 1; }
.nav-portal { padding: 10px 15px; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; font-size: 12px; font-weight: 750; white-space: nowrap; }
.scrolled .nav-portal { border-color: var(--line); }
.menu-btn { display: none; border: 0; background: transparent; color: inherit; padding: 9px; font-size: 23px; }

/* hero */
.hero { min-height: 760px; display: grid; align-items: center; color: #fff; background: #07101e; overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 76% 42%, rgba(90,85,246,.26), transparent 29%), radial-gradient(circle at 62% 63%, rgba(25,191,245,.16), transparent 27%); }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(90deg, transparent, #000 60%); }
.hero-inner { width: var(--content); margin: 0 auto; display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; position: relative; z-index: 2; padding: 120px 0 70px; }
.hero-copy h1 { margin: 0; font-size: clamp(44px, 4.8vw, 66px); line-height: 1.02; letter-spacing: -.055em; white-space: nowrap; }
.hero-copy h1 span { display: block; margin-top: 11px; color: #67ddff; }
.hero-copy p { margin: 27px 0 0; max-width: 620px; color: #b8c4d8; font-size: 18px; line-height: 1.85; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 32px; color: #b9c6da; font-size: 13px; }
.hero-proof b { color: #fff; }
.ecosystem { position: relative; min-height: 520px; display: grid; place-items: center; }
.eco-rings { position: absolute; inset: 50% auto auto 50%; width: 440px; height: 440px; transform: translate(-50%,-50%); border: 1px solid rgba(105,220,255,.15); border-radius: 50%; }
.eco-rings::before, .eco-rings::after { content: ""; position: absolute; border: 1px dashed rgba(126,105,255,.25); border-radius: 50%; inset: 46px; animation: spin 28s linear infinite; }
.eco-rings::after { inset: 118px; animation-direction: reverse; animation-duration: 18s; }
@keyframes spin { to { transform: rotate(360deg); } }
.eco-core { position: relative; z-index: 3; width: 205px; height: 205px; display: grid; place-items: center; text-align: center; padding: 22px; border-radius: 50%; color: #fff; background: radial-gradient(circle at 35% 25%, #6e67ff, #312c95 62%, #11143b); border: 1px solid rgba(255,255,255,.28); box-shadow: 0 0 80px rgba(76,88,255,.42), inset 0 0 30px rgba(255,255,255,.14); }
.eco-core strong { display: block; font-size: 22px; line-height: 1.15; }
.eco-core span { display: block; margin-top: 9px; color: #cbd8ff; font-size: 11px; line-height: 1.5; }
.eco-node { position: absolute; z-index: 4; width: 150px; padding: 13px 16px; border-radius: 16px; background: rgba(14,30,57,.88); backdrop-filter: blur(10px); border: 1px solid rgba(115,215,255,.22); box-shadow: 0 12px 38px rgba(0,0,0,.24); }
.eco-node b { display: block; font-size: 14px; }
.eco-node small { display: block; margin-top: 5px; color: #92a7c7; font-size: 10px; line-height: 1.4; }
.n1 { top: 20px; left: 50%; transform: translateX(-50%); }
.n2 { right: 10px; top: 30%; }
.n3 { right: 42px; bottom: 32px; }
.n4 { left: 42px; bottom: 32px; }
.n5 { left: 10px; top: 30%; }
.eco-platform { position: absolute; top: -10px; right: -15px; z-index: 5; padding: 11px 15px; border-radius: 999px; color: #07101e; background: #6fe4ff; font-weight: 800; font-size: 12px; box-shadow: 0 0 30px rgba(104,225,255,.3); }
.eco-network { position: absolute; bottom: -1px; left: 50%; transform: translateX(-50%); z-index: 5; width: 82%; padding: 11px 15px; text-align: center; border-radius: 14px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); color: #c5d2e6; font-size: 11px; }

/* value ladder */
.ladder { margin-top: 56px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.ladder-card { padding: 30px; min-height: 330px; position: relative; overflow: hidden; }
.ladder-card::after { content: attr(data-step); position: absolute; right: -8px; bottom: -32px; color: rgba(91,85,246,.06); font-size: 140px; font-weight: 950; }
.ladder-card h3 { margin: 25px 0 13px; font-size: 27px; letter-spacing: -.04em; }
.ladder-card p { color: var(--muted); line-height: 1.75; }
.check-list { display: grid; gap: 10px; margin: 22px 0 0; padding: 0; list-style: none; position: relative; z-index: 1; }
.check-list li { display: flex; gap: 9px; color: #3c485d; font-size: 13px; line-height: 1.55; }
.check-list li::before { content: "✓"; flex: 0 0 auto; color: var(--green); font-weight: 900; }

/* category generations */
.generation-map { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; margin-top: 48px; }
.gen-card { min-height: 340px; padding: 27px; border-radius: 22px; color: #aab7ca; background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.09); position: relative; overflow: hidden; }
.gen-card::after { content: attr(data-gen); position: absolute; right: -8px; bottom: -26px; color: rgba(255,255,255,.035); font-size: 112px; font-weight: 950; }
.gen-card.current { color: #eaf5ff; background: linear-gradient(150deg,rgba(88,78,239,.92),rgba(29,59,99,.82)); border-color: rgba(125,224,255,.4); box-shadow: 0 18px 60px rgba(65,70,220,.25); transform: translateY(-15px); }
.gen-card.future { background: linear-gradient(150deg,rgba(14,116,143,.5),rgba(38,25,79,.6)); border-color: rgba(100,223,255,.22); }
.gen-version { color: #6bdfff; font-size: 11px; font-weight: 850; letter-spacing: .12em; }
.gen-card h3 { margin: 17px 0 12px; color: #fff; font-size: 22px; letter-spacing: -.03em; }
.gen-card p { min-height: 63px; margin: 0; font-size: 12px; line-height: 1.7; }
.gen-card ul { position: relative; z-index: 1; display: grid; gap: 9px; margin: 19px 0 0; padding: 18px 0 0; border-top: 1px solid rgba(255,255,255,.1); list-style: none; font-size: 11px; line-height: 1.5; }
.gen-card li::before { content: "·"; margin-right: 7px; color: #6bdfff; }
.status-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.status-pill { display: inline-flex; align-items: center; gap: 7px; padding: 9px 13px; border-radius: 999px; color: #b8c5d7; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); font-size: 11px; }
.status-pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #29c99a; box-shadow: 0 0 10px currentColor; }
.status-pill.testing::before { background: #ffd166; }
.status-pill.roadmap::before { background: #6bdfff; }
.difference-table { display: grid; margin-top: 46px; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: #fff; }
.difference-row { display: grid; grid-template-columns: 160px 1fr 1fr 1.15fr; }
.difference-row > * { padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.difference-row > *:last-child { border-right: 0; }
.difference-row:last-child > * { border-bottom: 0; }
.difference-row.head { color: #fff; background: #081120; font-size: 13px; font-weight: 800; }
.difference-row .label { color: #46546b; font-size: 12px; font-weight: 800; background: #f7f8fb; }
.difference-row p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.difference-row .shine { color: #202d44; background: linear-gradient(120deg,rgba(91,85,246,.07),rgba(25,191,245,.06)); font-weight: 680; }
.moat-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 15px; margin-top: 42px; }
.moat-card { min-height: 245px; padding: 24px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.moat-card .moat-n { color: var(--blue); font-size: 11px; font-weight: 900; }
.moat-card h3 { margin: 18px 0 10px; font-size: 18px; }
.moat-card p { color: var(--muted); font-size: 12px; line-height: 1.7; }

/* service system */
.service-grid { display: grid; grid-template-columns: repeat(12,1fr); grid-auto-rows: 190px; gap: 18px; }
.service-card { grid-column: span 4; padding: 26px; position: relative; overflow: hidden; color: #fff; background: #12203a; border: 1px solid rgba(255,255,255,.1); border-radius: 24px; }
.service-card:nth-child(1) { grid-column: span 7; background: linear-gradient(135deg,#4338ca,#655cf6); }
.service-card:nth-child(2) { grid-column: span 5; background: linear-gradient(135deg,#0b6d91,#154667); }
.service-card:nth-child(3) { grid-column: span 5; background: linear-gradient(135deg,#a64c12,#4a2a1d); }
.service-card:nth-child(4) { grid-column: span 4; background: linear-gradient(135deg,#183668,#172038); }
.service-card:nth-child(5) { grid-column: span 3; background: linear-gradient(135deg,#166d59,#12352e); }
.service-card::after { content: ""; position: absolute; width: 180px; height: 180px; right: -80px; bottom: -100px; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; box-shadow: 0 0 0 30px rgba(255,255,255,.03),0 0 0 60px rgba(255,255,255,.02); }
.service-card .num { opacity: .55; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.service-card h3 { margin: 17px 0 7px; font-size: 22px; }
.service-card p { max-width: 420px; margin: 0; color: rgba(255,255,255,.7); font-size: 13px; line-height: 1.6; }

/* OS flow */
.order-flow { margin-top: 58px; display: grid; grid-template-columns: repeat(6,1fr); gap: 10px; position: relative; }
.order-flow::before { content: ""; position: absolute; top: 36px; left: 8%; right: 8%; height: 1px; background: linear-gradient(90deg, #5b55f6, #31c9ff); }
.flow-item { position: relative; z-index: 2; text-align: center; }
.flow-icon { width: 72px; height: 72px; margin: auto; display: grid; place-items: center; border-radius: 50%; color: #fff; background: #101d36; border: 1px solid rgba(101,218,255,.32); box-shadow: 0 0 0 8px #081120; font-size: 23px; }
.flow-item b { display: block; margin-top: 16px; font-size: 14px; }
.flow-item small { display: block; margin-top: 7px; color: #8fa0bc; font-size: 11px; line-height: 1.45; }

/* brands */
.brand-showcase { display: grid; grid-template-columns: 1.08fr .92fr; min-height: 500px; border-radius: 30px; overflow: hidden; box-shadow: var(--shadow); background: #1c2524; }
.brand-showcase + .brand-showcase { margin-top: 28px; }
.brand-photo { min-height: 470px; background: var(--photo) center/cover no-repeat; position: relative; }
.brand-photo::after { content: "空间方案示意"; position: absolute; left: 18px; bottom: 18px; padding: 8px 11px; border-radius: 999px; color: rgba(255,255,255,.8); background: rgba(0,0,0,.44); backdrop-filter: blur(8px); font-size: 10px; }
.brand-content { padding: 54px; color: #fff; display: flex; flex-direction: column; justify-content: center; }
.brand-content .brand-code { color: #7fe3c6; font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.brand-content h3 { margin: 13px 0; font-size: 42px; letter-spacing: -.05em; }
.brand-content .descriptor { color: #fff; font-size: 17px; font-weight: 730; }
.brand-content p { color: #aab8b4; line-height: 1.75; }
.brand-showcase.heart { background: #311a29; }
.brand-showcase.heart .brand-code { color: #ffb0cf; }
.brand-showcase.heart .brand-photo { order: 2; }
.brand-showcase.heart .brand-content p { color: #cab3c1; }
.micro-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.micro-list span { padding: 7px 10px; border-radius: 999px; background: rgba(255,255,255,.09); font-size: 11px; }

/* cases */
.filter-bar { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 32px; }
.filter-btn { padding: 10px 15px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--muted); font-size: 13px; font-weight: 700; }
.filter-btn.active { color: #fff; border-color: var(--blue); background: var(--blue); }
.case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.case-card { overflow: hidden; transition: transform .22s ease, box-shadow .22s ease; }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-cover { height: 215px; background: var(--photo) center/cover no-repeat; position: relative; }
.case-cover::after { content: "行业场景方案"; position: absolute; top: 14px; left: 14px; padding: 7px 10px; border-radius: 999px; color: #fff; background: rgba(8,17,32,.65); backdrop-filter: blur(6px); font-size: 10px; }
.case-body { padding: 24px; }
.case-body h3 { margin: 11px 0 9px; font-size: 20px; }
.case-body p { min-height: 66px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.case-meta { display: flex; gap: 12px; margin-top: 20px; padding-top: 17px; border-top: 1px solid var(--line); color: #506078; font-size: 11px; }
.evidence-grid { display: grid; grid-template-columns: 1.25fr .75fr; grid-template-rows: 290px 290px; gap: 18px; margin-top: 44px; }
.evidence-item { position: relative; overflow: hidden; border-radius: 22px; background: #111a2b; }
.evidence-item:first-child { grid-row: 1 / 3; }
.evidence-item img { width: 100%; height: 100%; object-fit: cover; }
.evidence-caption { position: absolute; inset: auto 14px 14px; display: flex; justify-content: space-between; gap: 12px; padding: 12px 14px; border-radius: 13px; color: #fff; background: rgba(5,11,21,.72); backdrop-filter: blur(10px); font-size: 11px; }
.evidence-caption b { font-size: 12px; }
.proof-strip { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-top: 18px; }
.proof-item { padding: 20px; border-radius: 17px; background: #fff; border: 1px solid var(--line); }
.proof-item b { display: block; font-size: 14px; }
.proof-item span { display: block; margin-top: 7px; color: var(--muted); font-size: 11px; line-height: 1.55; }
.tech-diagram { display: grid; grid-template-columns: repeat(5,1fr); align-items: stretch; gap: 28px; margin-top: 45px; }
.tech-node { min-height: 190px; padding: 24px; border-radius: 20px; color: #fff; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.11); position: relative; }
.tech-node:not(:last-child)::after { content: "→"; position: absolute; right: -22px; top: 50%; transform: translateY(-50%); color: #59d8ff; font-size: 20px; }
.tech-node b { display: block; margin: 16px 0 8px; font-size: 16px; }
.tech-node p { color: #90a3be; font-size: 11px; line-height: 1.65; }
.concept-figure { padding: 30px; border-radius: 26px; background: #091426; border: 1px solid rgba(255,255,255,.1); }
.concept-figure img { width: 100%; border-radius: 17px; }

/* network */
.network-map { display: grid; grid-template-columns: .78fr 1.22fr; gap: 55px; align-items: center; }
.network-stack { display: grid; gap: 14px; }
.network-level { padding: 20px 23px; border-radius: 18px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); }
.network-level:nth-child(2) { margin-inline: 35px; }
.network-level:nth-child(3) { margin-inline: 70px; }
.network-level b { display: block; font-size: 17px; }
.network-level span { display: block; margin-top: 6px; color: #91a2bd; font-size: 12px; }
.network-copy h2 { margin: 0; font-size: clamp(35px,4vw,56px); line-height: 1.1; letter-spacing: -.045em; }
.network-copy p { color: #a9b6ca; line-height: 1.8; }

/* CTA */
.cta-band { padding: 78px; color: #fff; background: linear-gradient(125deg,#594ff0,#743fca 55%,#0da7cf); border-radius: 32px; position: relative; overflow: hidden; }
.cta-band::after { content: ""; position: absolute; width: 340px; height: 340px; right: -100px; top: -110px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); box-shadow: 0 0 0 60px rgba(255,255,255,.04),0 0 0 120px rgba(255,255,255,.03); }
.cta-band h2 { position: relative; z-index: 2; margin: 0; max-width: 740px; font-size: clamp(36px,5vw,64px); line-height: 1.07; letter-spacing: -.05em; }
.cta-band p { position: relative; z-index: 2; max-width: 670px; color: rgba(255,255,255,.78); line-height: 1.75; }
.cta-band .btns { position: relative; z-index: 2; }

/* inner page hero */
.page-hero { min-height: 560px; padding: 155px 0 90px; color: #fff; background: linear-gradient(135deg,#07101e,#17274b 68%,#2e275e); position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; inset: 0; opacity: .2; background-image: radial-gradient(circle at 80% 40%,rgba(90,210,255,.65),transparent 24%),linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px); background-size: auto,60px 60px,60px 60px; }
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { max-width: 900px; margin: 14px 0 0; font-size: clamp(50px,7vw,88px); line-height: 1; letter-spacing: -.06em; }
.page-hero p { max-width: 720px; color: #b7c4d8; font-size: 18px; line-height: 1.8; }
.page-hero .breadcrumb { color: #7edfff; font-size: 12px; font-weight: 750; letter-spacing: .1em; }
.brand-hero { min-height: 760px; display: grid; align-items: end; color: #fff; background: var(--hero-photo) center/cover no-repeat; position: relative; }
.brand-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg,rgba(4,10,17,.92) 0%,rgba(4,10,17,.7) 42%,rgba(4,10,17,.14) 76%),linear-gradient(0deg,rgba(4,10,17,.65),transparent 50%); }
.brand-hero.right-copy::before { background: linear-gradient(270deg,rgba(20,7,18,.94) 0%,rgba(30,11,27,.72) 42%,rgba(14,6,13,.14) 76%),linear-gradient(0deg,rgba(20,7,18,.58),transparent 50%); }
.brand-hero .hero-inner-brand { width: var(--content); margin: 0 auto; padding: 150px 0 86px; position: relative; z-index: 2; }
.brand-hero.right-copy .hero-inner-brand { display: flex; justify-content: flex-end; }
.brand-hero-copy { max-width: 660px; }
.brand-hero h1 { margin: 16px 0; font-size: clamp(52px,7vw,92px); line-height: .98; letter-spacing: -.065em; }
.brand-hero p { color: #d0d5df; font-size: 18px; line-height: 1.75; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
.hero-stats span { padding: 9px 13px; border-radius: 999px; color: #fff; background: rgba(255,255,255,.1); backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,.12); font-size: 12px; }
.photo-caption { position: absolute; right: 17px; bottom: 16px; z-index: 3; color: rgba(255,255,255,.66); font-size: 10px; }

/* room types / investment */
.room-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.room-card { padding: 28px; }
.room-card .room-no { color: var(--blue); font-size: 11px; font-weight: 850; letter-spacing: .12em; }
.room-card h3 { margin: 15px 0 9px; font-size: 23px; }
.room-card p { color: var(--muted); font-size: 13px; line-height: 1.7; }
.room-card ul { margin: 18px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; color: #3e4c62; font-size: 12px; line-height: 1.9; }
.invest-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 28px; align-items: stretch; }
.calc { padding: 32px; }
.calc h3 { margin-top: 0; font-size: 25px; }
.form-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 15px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { color: #4d5a6e; font-size: 12px; font-weight: 700; }
.field input, .field select, .field textarea { width: 100%; padding: 13px 14px; color: var(--ink); background: #f8f9fc; border: 1px solid var(--line); border-radius: 12px; outline: none; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(91,85,246,.1); }
.calc-result { padding: 32px; color: #fff; background: var(--ink); border-radius: var(--radius); display: flex; flex-direction: column; justify-content: center; }
.calc-result .label { color: #93a5c0; font-size: 12px; }
.calc-result strong { display: block; margin: 5px 0 20px; color: #70e0ff; font-size: 44px; letter-spacing: -.04em; }
.calc-result dl { display: grid; gap: 13px; margin: 0; }
.calc-result dl div { display: flex; justify-content: space-between; gap: 20px; padding-top: 13px; border-top: 1px solid rgba(255,255,255,.1); }
.calc-result dt { color: #92a2bb; font-size: 12px; }
.calc-result dd { margin: 0; font-size: 13px; font-weight: 750; }
.calc-result small { margin-top: 24px; color: #788aa6; line-height: 1.6; }
.role-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.role-card { padding: 28px; }
.role-card h3 { margin: 12px 0; }
.role-card p { color: var(--muted); line-height: 1.7; font-size: 13px; }

/* OS page */
.stack-map { display: grid; gap: 12px; max-width: 930px; margin: 52px auto 0; }
.stack-layer { display: grid; grid-template-columns: 180px 1fr; gap: 30px; align-items: center; padding: 23px 28px; color: #fff; border-radius: 18px; background: linear-gradient(90deg,rgba(91,85,246,.95),rgba(28,74,115,.8)); border: 1px solid rgba(255,255,255,.15); }
.stack-layer:nth-child(2) { margin-inline: 25px; background: linear-gradient(90deg,#086f8c,#245776); }
.stack-layer:nth-child(3) { margin-inline: 50px; background: linear-gradient(90deg,#17634f,#285348); }
.stack-layer:nth-child(4) { margin-inline: 75px; background: linear-gradient(90deg,#8a4b1e,#513321); }
.stack-layer:nth-child(5) { margin-inline: 100px; background: linear-gradient(90deg,#40365a,#29283b); }
.stack-layer b { font-size: 18px; }
.stack-layer span { color: rgba(255,255,255,.7); font-size: 12px; line-height: 1.6; }
.ai-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 15px; }
.ai-card { padding: 24px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); border-radius: 20px; }
.ai-card h3 { margin: 18px 0 9px; font-size: 17px; }
.ai-card p { color: #91a3bd; font-size: 12px; line-height: 1.65; }

/* timeline */
.timeline { display: grid; gap: 18px; border-left: 1px solid var(--line); padding-left: 34px; }
.timeline-item { position: relative; padding: 7px 0 24px; }
.timeline-item::before { content: ""; position: absolute; left: -41px; top: 12px; width: 13px; height: 13px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 6px rgba(91,85,246,.12); }
.timeline-item b { font-size: 17px; }
.timeline-item p { color: var(--muted); line-height: 1.7; }

/* forms */
.apply-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 50px; }
.apply-types { display: grid; gap: 12px; }
.apply-type { padding: 18px 20px; border-radius: 16px; border: 1px solid var(--line); background: #fff; }
.apply-type b { display: block; }
.apply-type span { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; }
.apply-form { padding: 34px; }
.form-note { margin-top: 15px; color: var(--muted); font-size: 11px; line-height: 1.6; }
.form-status { display: none; margin-top: 15px; padding: 13px 15px; border-radius: 12px; color: #08795f; background: #e1f9f1; font-size: 12px; }
.form-status.show { display: block; }

/* OS portal */
.portal-page { min-height: 100vh; padding: 38px; color: #fff; background: radial-gradient(circle at 80% 18%,rgba(91,85,246,.28),transparent 30%),radial-gradient(circle at 18% 82%,rgba(25,191,245,.14),transparent 28%),#07101e; position: relative; overflow: hidden; }
.portal-page::before { content:""; position:absolute; inset:0; opacity:.12; background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px); background-size:64px 64px; }
.portal-home { position:relative; z-index:2; color:#aebdd3; font-size:13px; }
.portal-shell { width:min(1180px,calc(100vw - 76px)); min-height:calc(100vh - 150px); margin:auto; display:grid; grid-template-columns:.9fr 1.1fr; gap:70px; align-items:center; position:relative; z-index:1; }
.portal-copy .brand { margin-bottom:56px; }
.portal-copy .tag { margin-bottom:22px; }
.portal-copy h1 { margin:0; font-size:clamp(46px,5.2vw,72px); line-height:1.03; letter-spacing:-.055em; }
.portal-copy p { max-width:600px; margin:25px 0 0; color:#aab9cf; font-size:17px; line-height:1.85; }
.portal-links { display:flex; flex-wrap:wrap; gap:24px; margin-top:34px; color:#73ddff; font-size:13px; font-weight:700; }
.portal-console { padding:22px; border:1px solid rgba(113,220,255,.2); border-radius:30px; background:linear-gradient(150deg,rgba(20,36,68,.92),rgba(11,20,38,.9)); box-shadow:0 40px 100px rgba(0,0,0,.35),inset 0 1px rgba(255,255,255,.08); backdrop-filter:blur(20px); }
.portal-console-head { display:flex; align-items:center; gap:7px; padding:4px 4px 20px; border-bottom:1px solid rgba(255,255,255,.08); }
.portal-console-head span { width:8px; height:8px; border-radius:50%; background:#ff7979; }.portal-console-head span:nth-child(2){background:#ffd166}.portal-console-head span:nth-child(3){background:#32d296}.portal-console-head b{margin-left:auto;color:#90a3bf;font-size:11px;letter-spacing:.08em}
.portal-kpis { display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:22px; }
.portal-kpis div { padding:20px; border-radius:17px; background:rgba(255,255,255,.045); border:1px solid rgba(255,255,255,.07); }
.portal-kpis small,.portal-kpis em { display:block; color:#8597b2; font-size:10px; font-style:normal; }.portal-kpis strong{display:block;margin:9px 0 5px;color:#70e0ff;font-size:25px}
.portal-flow { display:flex; align-items:center; justify-content:space-between; gap:9px; margin-top:14px; padding:28px 18px; border-radius:17px; background:linear-gradient(120deg,rgba(91,85,246,.24),rgba(25,191,245,.08)); }
.portal-flow span { padding:9px 12px; border-radius:10px; background:rgba(255,255,255,.08); font-size:11px; }.portal-flow i{color:#5bdcff;font-style:normal}
.portal-ai { margin-top:14px; padding:22px; border-radius:17px; background:rgba(255,255,255,.04); }.portal-ai b{color:#fff}.portal-ai p{margin:8px 0 0;color:#8092ae;font-size:11px}
.portal-foot { position:relative; z-index:2; text-align:center; color:#53647e; font-size:11px; }.portal-foot a{color:#8296b4}

/* FAQ */
.faq { max-width: 900px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 22px 0; border: 0; color: var(--ink); background: transparent; text-align: left; font-weight: 800; }
.faq-q span:last-child { font-size: 22px; transition: transform .2s ease; }
.faq-a { max-height: 0; overflow: hidden; color: var(--muted); font-size: 14px; line-height: 1.75; transition: max-height .25s ease; }
.faq-a p { margin: 0 0 22px; }
.faq-item.open .faq-a { max-height: 220px; }
.faq-item.open .faq-q span:last-child { transform: rotate(45deg); }

/* footer */
.site-footer { color: #fff; background: #050b15; padding: 70px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(3,1fr); gap: 45px; }
.footer-brand { max-width: 370px; }
.footer-brand p { color: #7e8ca2; font-size: 13px; line-height: 1.75; }
.footer-col h4 { margin: 4px 0 17px; font-size: 13px; }
.footer-col a { display: block; margin: 11px 0; color: #8290a5; font-size: 12px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 55px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.08); color: #59677b; font-size: 11px; }

/* reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .main-nav { position: fixed; top: 72px; left: 14px; right: 14px; display: none; padding: 20px; border-radius: 20px; color: var(--ink); background: #fff; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 10px; }
  .nav-portal { display: none; }
  .menu-btn { display: block; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 140px; }
  .ecosystem { min-height: 500px; }
  .ladder, .grid-3, .case-grid, .room-grid, .role-grid { grid-template-columns: repeat(2,1fr); }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .service-card, .service-card:nth-child(n) { grid-column: span 6; }
  .order-flow { grid-template-columns: repeat(3,1fr); gap: 28px 10px; }
  .order-flow::before { display: none; }
  .brand-showcase { grid-template-columns: 1fr; }
  .brand-showcase.heart .brand-photo { order: 0; }
  .network-map, .invest-layout, .apply-layout { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: repeat(3,1fr); }
  .generation-map { grid-template-columns: repeat(2,1fr); }
  .gen-card.current { transform: none; }
  .difference-table { overflow-x: auto; }
  .difference-row { min-width: 850px; }
  .moat-grid { grid-template-columns: repeat(3,1fr); }
  .evidence-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 390px 250px; }
  .evidence-item:first-child { grid-column: 1 / 3; grid-row: auto; }
  .proof-strip { grid-template-columns: repeat(2,1fr); }
  .tech-diagram { grid-template-columns: repeat(2,1fr); }
  .tech-node:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
  .portal-shell { grid-template-columns:1fr; padding:90px 0 60px; gap:45px; }
}

@media (max-width: 680px) {
  :root { --content: min(100% - 28px, 1180px); --radius: 19px; }
  .section { padding: 76px 0; }
  .section-head { display: block; margin-bottom: 34px; }
  .section-head .link-arrow { margin-top: 20px; }
  .section-lead { font-size: 15px; }
  .hero { min-height: 900px; }
  .hero-inner { gap: 20px; padding-top: 116px; }
  .hero-copy h1 { font-size: clamp(40px, 11.2vw, 48px); }
  .hero-copy p { font-size: 15px; }
  .hero-proof { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .ecosystem { transform: scale(.83); margin-inline: -35px; min-height: 460px; }
  .eco-platform { right: 15px; }
  .ladder, .grid-2, .grid-3, .grid-4, .case-grid, .room-grid, .role-grid { grid-template-columns: 1fr; }
  .service-grid { grid-auto-rows: auto; }
  .service-card, .service-card:nth-child(n) { grid-column: 1/-1; min-height: 180px; }
  .order-flow { grid-template-columns: repeat(2,1fr); }
  .brand-content { padding: 32px 24px; }
  .brand-content h3 { font-size: 34px; }
  .brand-photo { min-height: 330px; }
  .cta-band { padding: 44px 25px; border-radius: 24px; }
  .page-hero { min-height: 500px; padding-top: 130px; }
  .page-hero h1 { font-size: 51px; }
  .brand-hero { min-height: 740px; background-position: 62% center; }
  .brand-hero.right-copy { background-position: 66% center; }
  .brand-hero.right-copy::before { background: linear-gradient(0deg,rgba(20,7,18,.95),rgba(20,7,18,.23) 80%); }
  .brand-hero::before { background: linear-gradient(0deg,rgba(4,10,17,.96),rgba(4,10,17,.15) 80%); }
  .brand-hero.right-copy .hero-inner-brand { display: block; }
  .brand-hero .hero-inner-brand { padding-bottom: 52px; }
  .brand-hero h1 { font-size: 52px; }
  .network-level:nth-child(n), .stack-layer:nth-child(n) { margin-inline: 0; }
  .stack-layer { grid-template-columns: 1fr; gap: 7px; }
  .ai-grid { grid-template-columns: 1fr; }
  .generation-map, .moat-grid { grid-template-columns: 1fr; }
  .evidence-grid { display: grid; grid-template-columns: 1fr; grid-template-rows: repeat(3,280px); }
  .evidence-item:first-child { grid-column: auto; }
  .proof-strip, .tech-diagram { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; }
  .photo-caption { display: none; }
  .portal-page { padding:22px 14px; }
  .portal-shell { width:100%; }
  .portal-copy .brand { margin-bottom:40px; }
  .portal-copy h1 { font-size:43px; }
  .portal-kpis { grid-template-columns:1fr; }
  .portal-flow { overflow:auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}