:root {
  --ink: #e8f0fb;
  --muted: #90a2b8;
  --muted-strong: #b6c5d8;
  --night: #07101d;
  --night-deep: #050b14;
  --panel: rgba(14, 28, 48, .72);
  --panel-solid: #0d1b2e;
  --line: rgba(150, 184, 219, .16);
  --cyan: #5fe0db;
  --cyan-bright: #8df1dc;
  --blue: #7ea8ff;
  --warm: #f3c476;
  --radius: 18px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--night); font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.7; }
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: -2; background: radial-gradient(circle at 75% 7%, rgba(61, 145, 173, .16), transparent 32%), radial-gradient(circle at 15% 32%, rgba(81, 95, 186, .11), transparent 30%), linear-gradient(150deg, #081423 0%, #06101c 50%, #07101b 100%); }
.noise { position: fixed; inset: 0; pointer-events: none; z-index: 5; opacity: .025; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E"); }
a { color: inherit; text-decoration: none; }
.section-shell { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.site-header { width: min(var(--max), calc(100% - 48px)); height: 78px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(163, 195, 223, .1); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; letter-spacing: .12em; font-weight: 700; }
.brand-mark { display: inline-flex; align-items: flex-end; gap: 3px; height: 18px; width: 22px; }
.brand-mark span { display: block; width: 5px; border-radius: 3px 3px 1px 1px; background: var(--cyan); box-shadow: 0 0 12px rgba(95, 224, 219, .55); }
.brand-mark span:nth-child(1) { height: 10px; opacity: .55; }.brand-mark span:nth-child(2) { height: 17px; }.brand-mark span:nth-child(3) { height: 13px; opacity: .78; }
.main-nav { display: flex; gap: 33px; margin-left: 90px; color: var(--muted); font-size: 13px; }
.main-nav a, .header-link, .text-link, .route-card a, .note-card a { transition: color .2s ease; }.main-nav a:hover, .header-link:hover, .text-link:hover, .route-card a:hover, .note-card a:hover { color: var(--cyan-bright); }
.header-link { color: var(--muted-strong); font-size: 13px; }.header-link span { color: var(--cyan); margin-left: 8px; }
.hero { min-height: 680px; display: grid; grid-template-columns: 1.01fr .99fr; align-items: center; gap: 50px; padding: 85px 0 100px; }
.eyebrow, .section-kicker, .note-label { color: var(--cyan); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; font-weight: 700; }.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 24px; }.pulse-dot, .status-light { width: 7px; height: 7px; display: inline-block; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 13px var(--cyan); }
h1 { margin: 0; font-size: clamp(54px, 7.2vw, 88px); line-height: 1.05; letter-spacing: -.055em; font-weight: 650; }.hero h1 em { color: var(--cyan-bright); font-style: normal; text-shadow: 0 0 36px rgba(95, 224, 219, .14); }
.hero-lede { max-width: 540px; margin: 29px 0 0; color: var(--muted-strong); font-size: 16px; line-height: 1.95; }.hero-actions { display: flex; gap: 13px; margin-top: 34px; }.button { display: inline-flex; align-items: center; gap: 23px; padding: 12px 18px; border: 1px solid transparent; border-radius: 8px; font-size: 12px; font-weight: 700; letter-spacing: .03em; transition: transform .2s ease, background .2s ease, border-color .2s ease; }.button:hover { transform: translateY(-2px); }.button-primary { color: #06201f; background: var(--cyan-bright); box-shadow: 0 7px 24px rgba(95, 224, 219, .13); }.button-primary:hover { background: #b4f7e8; }.button-quiet { color: var(--muted-strong); border-color: var(--line); background: rgba(8, 18, 31, .35); }.button-quiet:hover { border-color: rgba(141, 241, 220, .5); }
.hero-meta { display: flex; gap: 35px; margin-top: 76px; }.hero-meta div { display: flex; flex-direction: column; gap: 2px; }.hero-meta strong { font-size: 24px; letter-spacing: -.03em; color: var(--ink); }.hero-meta span { color: var(--muted); font-size: 11px; }
.hero-visual { position: relative; min-height: 480px; }.core-card { position: absolute; z-index: 2; top: 125px; left: 50%; transform: translateX(-50%); width: 280px; min-height: 280px; padding: 23px; border: 1px solid rgba(141, 241, 220, .32); border-radius: 22px; background: linear-gradient(150deg, rgba(28, 65, 89, .88), rgba(9, 22, 39, .96) 70%); box-shadow: 0 25px 80px rgba(0, 0, 0, .27), inset 0 1px 0 rgba(255,255,255,.08), 0 0 70px rgba(95, 224, 219, .07); }.core-topline { display: flex; align-items: center; gap: 8px; color: #9fb6c9; font-size: 8px; letter-spacing: .14em; }.core-glyph { margin-top: 31px; color: var(--cyan-bright); font-size: 54px; line-height: 1; font-weight: 300; text-shadow: 0 0 28px rgba(95, 224, 219, .4); }.core-title { margin: 17px 0 27px; color: #b7c8da; font-size: 14px; line-height: 1.75; }.core-title b { color: var(--ink); font-size: 17px; }.core-tags { display: flex; gap: 6px; }.core-tags span { padding: 4px 8px; border: 1px solid rgba(141, 241, 220, .18); border-radius: 4px; color: var(--cyan); font-size: 9px; }
.orbit { position: absolute; border: 1px solid rgba(122, 171, 207, .18); border-radius: 50%; transform: rotate(-18deg); }.orbit-one { width: 460px; height: 180px; top: 174px; left: 50%; transform: translateX(-50%) rotate(-28deg); }.orbit-two { width: 335px; height: 445px; top: 42px; left: 50%; transform: translateX(-50%) rotate(34deg); border-color: rgba(95, 224, 219, .15); }.signal { position: absolute; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 6px rgba(95,224,219,.08), 0 0 35px rgba(95,224,219,.7); width: 5px; height: 5px; }.signal-one { top: 127px; left: 89px; }.signal-two { right: 62px; bottom: 102px; background: var(--warm); box-shadow: 0 0 0 6px rgba(243,196,118,.08), 0 0 30px rgba(243,196,118,.62); }.floating-note { position: absolute; z-index: 3; padding: 8px 10px; color: var(--muted-strong); border: 1px solid var(--line); border-radius: 5px; background: rgba(7, 16, 29, .82); font-size: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.16); }.floating-note span { margin-right: 8px; color: var(--cyan); font-size: 9px; }.note-top { top: 84px; right: 56px; }.note-right { right: 11px; top: 299px; }.note-bottom { left: 61px; bottom: 68px; }
.intro { padding: 43px 0 120px; border-top: 1px solid var(--line); }.intro-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; margin-top: 25px; }.intro h2, .section-heading h2, .ops-layout h2, .login h2, .closing h2 { margin: 0; color: var(--ink); font-size: clamp(30px, 4.2vw, 47px); line-height: 1.25; letter-spacing: -.045em; font-weight: 600; }.intro h2 span, .closing h2 span { color: var(--muted); }.intro-text { padding-top: 4px; color: var(--muted); font-size: 14px; }.intro-text p { margin: 0 0 16px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 42px; }.section-heading h2 { margin-top: 11px; font-size: clamp(29px, 3.8vw, 44px); }.section-heading > p { max-width: 270px; margin: 0 0 6px; color: var(--muted); font-size: 13px; }.route { padding-bottom: 137px; }.route-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }.route-card { position: relative; min-height: 268px; padding: 27px 25px 23px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(17, 33, 55, .65), rgba(8, 19, 34, .67)); transition: transform .25s ease, border-color .25s ease; }.route-card:hover { transform: translateY(-4px); border-color: rgba(141, 241, 220, .4); }.route-card-featured { background: linear-gradient(145deg, rgba(30, 72, 87, .75), rgba(12, 34, 49, .75)); border-color: rgba(95, 224, 219, .34); }.card-index { color: var(--cyan); font-size: 10px; letter-spacing: .12em; }.card-icon { margin: 29px 0 20px; color: var(--cyan-bright); font-size: 23px; }.route-card h3 { margin: 0 0 10px; font-size: 17px; font-weight: 600; }.route-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.85; }.route-card a { position: absolute; bottom: 21px; color: var(--muted-strong); font-size: 11px; }.route-card a span, .note-card a span, .text-link span { margin-left: 8px; color: var(--cyan); }
.architecture { padding-bottom: 138px; }.architecture-board { padding: 31px 35px 25px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(9, 23, 39, .65); box-shadow: inset 0 1px 0 rgba(255,255,255,.03); }.board-caption { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 9px; letter-spacing: .18em; }.caption-line { width: 26px; height: 1px; background: var(--cyan); }.flow-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 67px 0 62px; }.flow-node { position: relative; display: flex; min-width: 145px; flex-direction: column; gap: 5px; padding: 17px 15px 15px; border: 1px solid var(--line); border-radius: 10px; background: rgba(18, 38, 62, .7); }.flow-node::before { content: ""; position: absolute; top: -5px; right: -5px; width: 10px; height: 10px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(95,224,219,.08); }.flow-node b { font-size: 12px; }.flow-node small { color: var(--muted); font-size: 9px; }.node-number { margin-bottom: 5px; color: var(--cyan); font-size: 9px; letter-spacing: .1em; }.node-core { border-color: rgba(95,224,219,.35); background: linear-gradient(135deg, rgba(26,70,85,.72), rgba(12,34,49,.72)); }.flow-arrow { display: flex; position: relative; flex: 1; align-items: center; flex-direction: column; gap: 7px; }.flow-arrow span { position: relative; width: 100%; height: 1px; background: linear-gradient(90deg, rgba(95,224,219,.18), rgba(95,224,219,.7), rgba(95,224,219,.18)); }.flow-arrow span::after { content: ""; position: absolute; right: 0; top: -3px; border-left: 5px solid var(--cyan); border-top: 3px solid transparent; border-bottom: 3px solid transparent; }.flow-arrow i { color: var(--muted); font-size: 8px; font-style: normal; }.board-footer { display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 11px; }.board-pill { padding: 4px 8px; border: 1px solid rgba(95,224,219,.22); border-radius: 4px; color: var(--cyan); font-size: 9px; }.architecture-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 34px; }.architecture-notes > div { display: grid; grid-template-columns: 28px 1fr; column-gap: 14px; }.architecture-notes span { grid-row: span 2; padding-top: 4px; color: var(--cyan); font-size: 10px; }.architecture-notes h3 { margin: 0 0 5px; font-size: 14px; }.architecture-notes p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.login { padding-bottom: 135px; }.login-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; padding: 55px 60px; border: 1px solid rgba(126,168,255,.18); border-radius: var(--radius); background: radial-gradient(circle at 88% 20%, rgba(126,168,255,.15), transparent 28%), linear-gradient(130deg, rgba(19,37,66,.8), rgba(9,21,37,.7)); }.login-copy h2 { margin-top: 13px; }.login-copy p { max-width: 440px; margin: 22px 0 24px; color: var(--muted-strong); font-size: 13px; line-height: 1.9; }.text-link { color: var(--cyan); font-size: 11px; }.login-steps { display: flex; flex-direction: column; gap: 23px; justify-content: center; }.login-steps > div { display: grid; grid-template-columns: 30px 1fr; gap: 13px; align-items: start; }.login-steps > div > span { display: grid; place-items: center; width: 26px; height: 26px; border: 1px solid rgba(95,224,219,.45); border-radius: 50%; color: var(--cyan); font-size: 10px; }.login-steps b { display: block; margin-bottom: 4px; font-size: 13px; }.login-steps small { color: var(--muted); font-size: 11px; }
.notes { padding-bottom: 136px; }.notes-grid { display: grid; grid-template-columns: 1.28fr .86fr .86fr; gap: 14px; }.note-card { min-height: 260px; padding: 26px 25px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(14, 30, 50, .6); }.note-wide { background: linear-gradient(145deg, rgba(22, 53, 70, .68), rgba(10, 23, 38, .64)); }.note-accent { border-color: rgba(243,196,118,.23); }.note-accent .note-label { color: var(--warm); }.note-card h3 { margin: 26px 0 11px; font-size: 19px; font-weight: 600; }.note-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.85; }.note-tags { display: flex; gap: 7px; margin-top: 27px; }.note-tags span { padding: 4px 7px; border: 1px solid rgba(95,224,219,.2); border-radius: 3px; color: var(--cyan); font-size: 9px; }.note-card a { display: inline-block; margin-top: 30px; color: var(--muted-strong); font-size: 11px; }
.operations { padding-bottom: 137px; }.ops-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; }.ops-layout h2 { margin-top: 14px; }.ops-intro { max-width: 300px; margin-top: 23px; color: var(--muted); font-size: 13px; }.checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 17px; }.check-item { display: grid; grid-template-columns: 28px 1fr; gap: 12px; padding: 20px 0; border-top: 1px solid var(--line); }.check-box { display: grid; place-items: center; width: 23px; height: 23px; border: 1px solid rgba(95,224,219,.35); border-radius: 5px; color: var(--cyan); font-size: 12px; }.check-item b { display: block; font-size: 13px; }.check-item small { display: block; margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.7; }
.faq { padding-bottom: 136px; }.faq-list { border-top: 1px solid var(--line); }.faq-list details { border-bottom: 1px solid var(--line); }.faq-list summary { display: flex; justify-content: space-between; gap: 30px; padding: 23px 3px; cursor: pointer; list-style: none; font-size: 14px; }.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary span { color: var(--cyan); font-size: 18px; font-weight: 300; transition: transform .2s ease; }.faq-list details[open] summary span { transform: rotate(45deg); }.faq-list p { max-width: 720px; margin: -4px 0 23px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.closing { padding-bottom: 100px; }.closing-card { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 25px; overflow: hidden; padding: 50px 57px; border: 1px solid rgba(95,224,219,.28); border-radius: var(--radius); background: linear-gradient(120deg, rgba(21,65,78,.74), rgba(11,28,48,.73)); }.closing-card h2 { margin-top: 12px; font-size: clamp(29px, 3.5vw, 41px); }.closing-card .button { position: relative; z-index: 1; }.closing-orb { position: absolute; right: 19%; top: -90px; width: 350px; height: 350px; border: 1px solid rgba(95,224,219,.14); border-radius: 50%; box-shadow: 0 0 70px rgba(95,224,219,.08); }.closing-orb::before, .closing-orb::after { content: ""; position: absolute; inset: 36px; border: 1px solid rgba(95,224,219,.12); border-radius: 50%; }.closing-orb::after { inset: 90px; }
.site-footer { padding-bottom: 36px; }.footer-top { display: flex; justify-content: space-between; gap: 20px; padding: 31px 0 24px; border-top: 1px solid var(--line); }.footer-top p { margin: 0; color: var(--muted); font-size: 11px; }.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 19px; border-top: 1px solid rgba(150,184,219,.08); color: #71859d; font-size: 10px; }.footer-bottom a { color: var(--cyan); }.footer-bottom a:hover { color: var(--cyan-bright); }
@media (max-width: 900px) { .main-nav { gap: 16px; margin-left: 15px; }.hero { grid-template-columns: 1fr; padding-top: 65px; }.hero-visual { min-height: 410px; }.intro-grid, .login-panel, .ops-layout { grid-template-columns: 1fr; gap: 35px; }.route-grid { grid-template-columns: repeat(2, 1fr); }.flow-row { flex-wrap: wrap; }.flow-node { flex: 1 1 40%; }.flow-arrow { flex: 1 1 30%; }.notes-grid { grid-template-columns: 1fr 1fr; }.note-wide { grid-column: span 2; }.ops-layout { gap: 45px; } }
@media (max-width: 620px) { .section-shell, .site-header { width: min(100% - 32px, var(--max)); }.site-header { height: 69px; }.main-nav { display: none; }.header-link { font-size: 11px; }.hero { min-height: auto; padding: 70px 0 75px; }.hero h1 { font-size: 58px; }.hero-lede { font-size: 14px; }.hero-actions { align-items: stretch; flex-direction: column; width: max-content; }.hero-meta { gap: 24px; margin-top: 52px; }.hero-visual { min-height: 365px; transform: scale(.86); transform-origin: top left; width: 116%; }.core-card { top: 90px; }.note-top { right: 18px; }.note-bottom { left: 28px; }.intro, .route, .architecture, .login, .notes, .operations, .faq { padding-bottom: 90px; }.section-heading { display: block; margin-bottom: 28px; }.section-heading > p { margin-top: 18px; }.route-grid, .notes-grid, .checklist, .architecture-notes { grid-template-columns: 1fr; }.note-wide { grid-column: auto; }.route-card { min-height: 240px; }.architecture-board { padding: 24px 16px 19px; }.flow-row { align-items: stretch; flex-direction: column; padding: 37px 0; }.flow-node { flex: auto; min-width: 0; }.flow-arrow { flex: auto; min-height: 28px; }.flow-arrow span { width: 1px; height: 21px; background: linear-gradient(180deg, rgba(95,224,219,.15), rgba(95,224,219,.7)); }.flow-arrow span::after { right: auto; top: auto; bottom: -1px; left: -3px; border-top: 5px solid var(--cyan); border-left: 3px solid transparent; border-right: 3px solid transparent; border-bottom: 0; }.flow-arrow i { margin-top: -3px; }.board-footer { align-items: flex-start; flex-direction: column; }.login-panel { padding: 32px 23px; }.closing-card { align-items: flex-start; flex-direction: column; padding: 36px 25px; }.closing-orb { right: -100px; }.footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; gap: 12px; } }
.reveal { opacity: 1; transform: none; }
/* Reading layout and accessibility */
a:focus-visible, summary:focus-visible { outline: 2px solid var(--cyan-bright); outline-offset: 5px; }
.skip-link { position: fixed; z-index: 20; left: 16px; top: -80px; padding: 10px 16px; background: var(--cyan-bright); color: #07101d; }
.skip-link:focus { top: 12px; }
section[id] { scroll-margin-top: 28px; }
.route-card { display: flex; flex-direction: column; min-height: 315px; }
.route-card a { position: static; margin-top: auto; padding-top: 20px; }
.article-layout { display: grid; grid-template-columns: 205px minmax(0, 760px); gap: 65px; padding: 65px 0 100px; justify-content: space-between; }
.article-nav { position: sticky; top: 30px; align-self: start; border-right: 1px solid var(--line); padding-right: 22px; }
.article-nav h2 { font-size: 18px; }
.article-nav a { display: block; color: var(--muted-strong); font-size: 13px; padding: 9px 0; }
.article-nav a:hover { color: var(--cyan-bright); }
.article-body { min-width: 0; color: var(--muted-strong); font-size: 16px; line-height: 1.95; overflow-wrap: anywhere; }
.article-heading { padding-bottom: 30px; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.article-heading h1 { color: var(--ink); font-size: clamp(42px, 6vw, 70px); }
.article-heading em { font-style: normal; color: var(--cyan-bright); }
.article-lede { margin: 24px 0 10px; font-size: 19px; }
.article-meta { color: var(--muted); font-size: 12px; }
.article-body section { margin: 65px 0; }
.article-body h2 { font-size: 29px; color: var(--ink); line-height: 1.5; letter-spacing: -.025em; }
.article-body h3 { margin-top: 30px; color: var(--ink); font-size: 20px; }
.article-body li { padding-left: 5px; margin-bottom: 12px; }
.article-body pre { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: #06101b; overflow-x: auto; font-size: 13px; line-height: 1.9; }
.article-body code { color: var(--cyan-bright); font-family: Consolas, monospace; }
.article-callout, .article-check { padding: 20px 24px; border-left: 2px solid var(--cyan); background: rgba(95,224,219,.05); border-radius: 0 10px 10px 0; font-size: 14px; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.article-body table { width: 100%; min-width: 540px; border-collapse: collapse; font-size: 13px; }
.article-body th, .article-body td { padding: 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.article-body th { color: var(--cyan-bright); background: rgba(95,224,219,.05); }
.reference-list { list-style: none; padding: 0; }
.reference-list li { display: flex; flex-direction: column; border-bottom: 1px solid var(--line); padding: 15px 0; }
.reference-list a { color: var(--cyan); }
.reference-list span { font-size: 13px; color: var(--muted); }
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 30px; }
  .article-nav { position: static; border-right: 0; padding: 20px; border: 1px solid var(--line); border-radius: 12px; display: flex; flex-wrap: wrap; gap: 8px 20px; }
  .article-nav > p, .article-nav > h2 { flex-basis: 100%; margin: 0; }
}
@media (max-width: 620px) {
  .hero-visual { transform: none; width: 100%; min-width: 0; height: 430px; overflow: hidden; }
  .core-card { width: 245px; top: 80px; }
  .note-top { top: 36px; right: 6px; }
  .note-right { right: 0; }
  .note-bottom { left: 4px; bottom: 0; }
  .route-card { min-height: 280px; }
  .article-layout { padding-top: 35px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 24px; }
  .article-body pre { padding: 15px; font-size: 12px; }
}