:root {
  --ink: #07111f;
  --ink-soft: #0c1b2f;
  --panel: #10233d;
  --paper: #f5f8fc;
  --white: #ffffff;
  --line: rgba(148, 180, 214, 0.22);
  --line-light: #dce6f0;
  --text: #d9e7f5;
  --muted: #91a8c0;
  --heading: #f7fbff;
  --blue: #2e7dff;
  --cyan: #1cd9ff;
  --green: #36d399;
  --orange: #ffb45c;
  --shadow: 0 24px 64px rgba(3, 13, 27, 0.28);
  --radius: 22px;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(circle at 76% 8%, rgba(28, 217, 255, .13), transparent 27rem),
    radial-gradient(circle at 10% 24%, rgba(46, 125, 255, .17), transparent 30rem),
    linear-gradient(180deg, #07111f 0%, #091727 58%, #07111f 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: .22;
  pointer-events: none;
  background-image: linear-gradient(rgba(99, 155, 211, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(99, 155, 211, .08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000, transparent 72%);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 2000; padding: 10px 16px; background: var(--white); color: var(--ink); border-radius: 10px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 72px;
  border-bottom: 1px solid rgba(148, 180, 214, .14);
  background: rgba(7, 17, 31, .82);
  backdrop-filter: blur(18px) saturate(140%);
}
.nav-shell { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--heading); font-weight: 800; letter-spacing: -.02em; white-space: nowrap; }
.brand-mark { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(145deg, var(--blue), var(--cyan)); box-shadow: 0 10px 30px rgba(46, 125, 255, .35); }
.brand-mark::before { content: "印"; font-size: 18px; color: white; }
.brand small { display: block; margin-top: -3px; color: #7f9ab6; font-size: 10px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; justify-content: center; gap: 30px; margin-left: auto; }
.nav-links a { position: relative; color: #a9bfd4; font-size: 14px; font-weight: 600; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -9px; height: 2px; background: var(--cyan); transition: right .25s ease; }
.nav-links a:hover, .nav-links a.active { color: white; }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.menu-toggle { display: none; width: 42px; height: 42px; color: white; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.04); }

.btn { min-height: 44px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 12px; font-weight: 700; transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: white; background: linear-gradient(135deg, var(--blue), #1764e7); box-shadow: 0 12px 30px rgba(46, 125, 255, .28); }
.btn-primary:hover { box-shadow: 0 16px 36px rgba(46, 125, 255, .4); }
.btn-ghost { color: #dcecff; border-color: rgba(164, 197, 231, .3); background: rgba(255,255,255,.035); }
.btn-small { min-height: 40px; padding: 0 16px; font-size: 13px; }

.notice-strip { display: none; border-bottom: 1px solid rgba(148, 180, 214, .14); background: rgba(46, 125, 255, .12); }
.notice-strip.show { display: block; }
.notice-inner { min-height: 44px; display: flex; align-items: center; gap: 12px; color: #cbe2f8; font-size: 13px; }
.notice-dot { width: 7px; height: 7px; border-radius: 99px; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); flex: 0 0 auto; }
.notice-inner strong { color: white; }

.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 20px; color: #7edfff; font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.hero { position: relative; overflow: hidden; padding: 96px 0 82px; }
.hero::after { content: ""; position: absolute; width: 560px; height: 560px; top: 30px; left: 62%; border: 1px solid rgba(91, 171, 255, .18); border-radius: 50%; box-shadow: inset 0 0 80px rgba(46,125,255,.04); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr); align-items: center; gap: 62px; }
.hero h1 { max-width: 720px; margin: 0; color: var(--heading); font-size: clamp(42px, 5vw, 70px); line-height: 1.08; letter-spacing: -.055em; }
.hero h1 span { display: block; color: transparent; background: linear-gradient(100deg, #8adfff, #4d8fff 48%, #a5bbff); background-clip: text; -webkit-background-clip: text; }
.hero-copy { max-width: 650px; margin: 25px 0 31px; color: #a9bfd4; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 30px; color: #7f99b2; font-size: 13px; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.app-frame { position: relative; min-width: 0; align-self: center; padding: 13px; border: 1px solid rgba(142, 190, 238, .22); border-radius: 25px; background: linear-gradient(145deg, rgba(255,255,255,.13), rgba(255,255,255,.035)); box-shadow: var(--shadow); transform: perspective(1200px) rotateY(-3deg) rotateX(1deg); }
.app-frame::before { content: ""; position: absolute; inset: -1px; z-index: -1; border-radius: inherit; background: linear-gradient(135deg, rgba(28,217,255,.35), transparent 35%, rgba(46,125,255,.2)); filter: blur(18px); opacity: .55; }
.app-frame img { width: 100%; height: auto; aspect-ratio: 997 / 714; object-fit: contain; border-radius: 15px; background: #eef4f9; }
.floating-status { position: absolute; right: -18px; bottom: 36px; min-width: 205px; padding: 15px 17px; border: 1px solid rgba(147, 196, 242, .24); border-radius: 15px; background: rgba(10, 27, 46, .92); box-shadow: var(--shadow); }
.floating-status strong { display: block; color: white; font-size: 14px; }
.floating-status span { color: var(--muted); font-size: 12px; }
.status-line { display: flex; align-items: center; gap: 9px; }
.status-line i { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 14px rgba(54,211,153,.65); }

.stats { padding: 0 0 32px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: rgba(13, 32, 54, .74); box-shadow: var(--shadow); }
.stat { padding: 28px 30px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: white; font-size: 28px; line-height: 1.2; }
.stat span { color: var(--muted); font-size: 13px; }

.section { padding: 96px 0; }
.section-tight { padding: 70px 0; }
.section-light { color: #24364a; background: var(--paper); }
.section-light .section-title, .section-light h2, .section-light h3 { color: #0c2138; }
.section-light .section-copy, .section-light .card p { color: #61758a; }
.section-head { max-width: 740px; margin-bottom: 42px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-title { margin: 0 0 16px; color: var(--heading); font-size: clamp(30px, 4vw, 46px); line-height: 1.2; letter-spacing: -.035em; }
.section-copy { margin: 0; color: var(--muted); font-size: 16px; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { position: relative; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: rgba(15, 35, 59, .68); transition: transform .25s ease, border-color .25s ease, background .25s ease; }
.card:hover { transform: translateY(-4px); border-color: rgba(92, 174, 255, .48); background: rgba(18, 43, 73, .88); }
.section-light .card { border-color: var(--line-light); background: white; box-shadow: 0 14px 38px rgba(44, 75, 105, .08); }
.section-light .card:hover { border-color: #aac9e8; background: white; }
.section-light .card h3 { color: #0c2138; }
.card-number { display: inline-flex; margin-bottom: 23px; color: #68dfff; font: 700 12px/1 "Segoe UI", sans-serif; letter-spacing: .14em; }
.section-light .card-number { color: #176ee8; }
.card h3 { margin: 0 0 10px; color: white; font-size: 19px; }
.card p { margin: 0; color: #91a8c0; font-size: 14px; }
.card-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; color: #73dfff; font-weight: 700; font-size: 13px; }
.section-light .card-link { color: #176ee8; }

.enterprise-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 54px; align-items: center; }
.enterprise-panel { padding: 28px; border: 1px solid rgba(145, 189, 233, .2); border-radius: 24px; background: linear-gradient(145deg, rgba(18, 44, 74, .92), rgba(9, 24, 43, .9)); box-shadow: var(--shadow); }
.policy-flow { display: grid; gap: 12px; }
.policy-node { display: grid; grid-template-columns: 46px 1fr auto; align-items: center; gap: 14px; padding: 16px; border: 1px solid rgba(145, 189, 233, .14); border-radius: 14px; background: rgba(255,255,255,.035); }
.policy-node b { color: white; font-size: 14px; }
.policy-node small { display: block; color: var(--muted); }
.policy-node em { color: var(--green); font-size: 12px; font-style: normal; }
.node-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; color: #8ce6ff; background: rgba(46,125,255,.14); font-weight: 800; }
.check-list { display: grid; gap: 13px; margin: 26px 0 32px; }
.check-list span { display: flex; gap: 11px; color: #b5cade; }
.check-list span::before { content: "✓"; color: var(--green); font-weight: 900; }

.showcase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.showcase-card { overflow: hidden; border: 1px solid var(--line-light); border-radius: 20px; background: white; box-shadow: 0 18px 45px rgba(42, 72, 105, .1); }
.showcase-image { position: relative; overflow: hidden; aspect-ratio: 997/714; background: #edf3f8; }
.showcase-image img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s ease; }
.showcase-card:hover img { transform: scale(1.018); }
.showcase-body { padding: 22px 24px 25px; }
.showcase-body h3 { margin: 0 0 7px; color: #0e233a; font-size: 19px; }
.showcase-body p { margin: 0; color: #667b91; font-size: 14px; }
.image-button { width: 100%; padding: 0; border: 0; background: none; text-align: left; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 25px; border-top: 1px solid rgba(132, 178, 222, .32); counter-increment: step; }
.step::before { content: "0" counter(step); display: block; margin-bottom: 26px; color: #5dd9ff; font: 800 13px/1 "Segoe UI", sans-serif; }
.step::after { content: ""; position: absolute; left: 0; top: -2px; width: 34px; height: 3px; background: var(--blue); }
.step h3 { margin: 0 0 8px; color: white; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 13px; }
.section-light .eyebrow { color: #176ee8; }
.section-light .step h3 { color: #0c2138; }
.section-light .step p { color: #61758a; }
.section-light .step code { color: #176ee8; }

.cta { padding: 78px 0; }
.cta-panel { position: relative; overflow: hidden; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; padding: 54px 58px; border: 1px solid rgba(112, 182, 250, .3); border-radius: 26px; background: linear-gradient(120deg, rgba(27, 76, 134, .64), rgba(13, 35, 62, .85)); box-shadow: var(--shadow); }
.cta-panel::after { content: ""; position: absolute; right: -100px; top: -170px; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(28,217,255,.22), transparent 68%); }
.cta-panel h2 { position: relative; z-index: 1; margin: 0 0 10px; color: white; font-size: clamp(27px, 4vw, 42px); }
.cta-panel p { position: relative; z-index: 1; margin: 0; color: #a9c3dc; }
.cta-actions { position: relative; z-index: 1; display: flex; gap: 10px; }

.changelog-list { display: grid; gap: 14px; }
.change-item { display: grid; grid-template-columns: 120px 1fr; gap: 22px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.change-version { color: #7ce2ff; font-weight: 800; }
.change-item h3 { margin: 0 0 6px; color: white; font-size: 16px; }
.change-item p { margin: 0; color: var(--muted); white-space: pre-line; font-size: 14px; }
.section-light .change-item { border-bottom-color: #dce7f1; }
.section-light .change-version { color: #176ee8; }
.section-light .change-item h3 { color: #0c2138; }
.section-light .change-item p { color: #61758a; }

.site-footer { padding: 54px 0 34px; border-top: 1px solid rgba(148, 180, 214, .14); background: #050e19; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 40px; }
.footer-brand p { max-width: 460px; margin: 17px 0 0; color: #718ba4; font-size: 13px; }
.footer-col h3 { margin: 0 0 16px; color: white; font-size: 14px; }
.footer-col a { display: block; margin: 8px 0; color: #7e98b1; font-size: 13px; }
.footer-col a:hover { color: #8ce6ff; }
.footer-bottom { margin-top: 38px; padding-top: 24px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(148, 180, 214, .11); color: #637c94; font-size: 12px; }
.footer-bottom a:hover { color: #8ce6ff; }

.back-to-top { position: fixed; right: clamp(16px, 3vw, 34px); bottom: clamp(18px, 4vw, 36px); z-index: 1250; width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid rgba(116, 190, 255, .38); border-radius: 14px; color: white; background: rgba(10, 31, 54, .92); box-shadow: 0 14px 34px rgba(1, 10, 24, .38); backdrop-filter: blur(10px); opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .2s ease, visibility .2s ease, transform .2s ease, background .2s ease; }
.back-to-top::before { content: "↑"; font-size: 22px; font-weight: 800; line-height: 1; }
.back-to-top:hover { background: #176be5; }
.back-to-top.show { opacity: 1; visibility: visible; transform: none; }
.back-to-top:focus-visible { outline: 3px solid rgba(84, 215, 255, .55); outline-offset: 3px; }

.knowledge-preview { background: linear-gradient(135deg, #071523 0%, #0a2137 100%); }
.knowledge-preview-grid { display: grid; grid-template-columns: 1fr .85fr; align-items: center; gap: 68px; }
.knowledge-preview-list { display: grid; gap: 12px; }
.knowledge-preview-list span { display: grid; grid-template-columns: 120px 1fr; gap: 14px; padding: 17px 19px; border: 1px solid var(--line); border-radius: 14px; color: #8ea8c0; background: rgba(255,255,255,.028); font-size: 13px; }
.knowledge-preview-list b { color: #dff5ff; }

/* Print knowledge base */
.kb-hero { padding: 76px 0 58px; border-bottom: 1px solid var(--line); background: radial-gradient(circle at 82% 20%, rgba(28, 217, 255, .12), transparent 31%); }
.kb-hero-grid { display: grid; grid-template-columns: 1fr auto; gap: 58px; align-items: end; }
.kb-hero h1 { max-width: 860px; margin: 0; color: white; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: -.045em; }
.kb-hero p { max-width: 820px; margin: 20px 0 0; color: var(--muted); font-size: 16px; }
.kb-overview { min-width: 270px; display: grid; grid-template-columns: auto 1fr; gap: 5px 13px; align-items: baseline; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.035); }
.kb-overview strong { color: #69e0ff; font-size: 28px; }
.kb-overview span { color: #9bb2c7; font-size: 13px; }
.kb-main { padding: 54px 0 88px; }
.kb-toolbar { position: sticky; top: 76px; z-index: 20; padding: 17px; border: 1px solid var(--line); border-radius: 18px; background: rgba(7, 20, 34, .94); box-shadow: 0 14px 36px rgba(2, 10, 20, .26); backdrop-filter: blur(14px); }
.kb-search { height: 48px; display: flex; align-items: center; gap: 12px; padding: 0 16px; border: 1px solid rgba(125, 181, 232, .28); border-radius: 12px; background: rgba(255,255,255,.045); }
.kb-search span { color: #68dcff; font-size: 25px; line-height: 1; transform: rotate(-18deg); }
.kb-search input { width: 100%; border: 0; outline: 0; color: white; background: transparent; }
.kb-search input::placeholder { color: #6f8aa4; }
.kb-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
.kb-filters button { padding: 8px 13px; border: 1px solid var(--line); border-radius: 99px; color: #89a2ba; background: transparent; font-size: 12px; }
.kb-filters button:hover, .kb-filters button.active { color: white; border-color: rgba(84, 210, 255, .52); background: rgba(29, 132, 255, .16); }
.kb-result { margin: 22px 3px 12px; color: #728ba3; font-size: 13px; }
.kb-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.kb-card { min-width: 0; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.025); transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.kb-card:hover { transform: translateY(-3px); border-color: rgba(87, 185, 255, .42); background: rgba(25, 83, 139, .11); }
.kb-card[hidden] { display: none; }
.kb-card > a { height: 100%; display: flex; flex-direction: column; align-items: flex-start; padding: 22px; }
.kb-card h2 { margin: 17px 0 9px; color: #edf8ff; font-size: 18px; line-height: 1.45; }
.kb-card p { flex: 1; margin: 0 0 18px; color: #7892aa; font-size: 13px; line-height: 1.75; }
.kb-card-link { color: #63dcff; font-size: 12px; font-weight: 800; }
.kb-list { display: grid; gap: 11px; }
.kb-article { scroll-margin-top: 190px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.025); transition: border-color .2s ease, background .2s ease; }
.kb-article:hover, .kb-article[open] { border-color: rgba(87, 185, 255, .38); background: rgba(25, 83, 139, .1); }
.kb-article[hidden] { display: none; }
.kb-article summary { min-height: 88px; display: grid; grid-template-columns: 118px 1fr 34px; align-items: center; gap: 17px; padding: 16px 20px; list-style: none; cursor: pointer; }
.kb-article summary::-webkit-details-marker { display: none; }
.kb-article summary > span:nth-child(2) { min-width: 0; }
.kb-article summary b { display: block; color: #edf8ff; font-size: 17px; }
.kb-article summary small { display: block; margin-top: 4px; color: #728da6; font-size: 12px; }
.kb-article summary i { position: relative; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 9px; }
.kb-article summary i::before, .kb-article summary i::after { content: ""; position: absolute; left: 8px; right: 8px; top: 14px; height: 2px; background: #65ddff; transition: transform .2s ease; }
.kb-article summary i::after { transform: rotate(90deg); }
.kb-article[open] summary i::after { transform: rotate(0); }
.kb-tag { justify-self: start; padding: 7px 10px; border-radius: 8px; color: #65ddff; background: rgba(29, 132, 255, .13); font-size: 11px; font-weight: 800; }
.kb-body { padding: 0 72px 28px 155px; color: #9db3c8; }
.kb-body h2 { margin: 3px 0 14px; color: white; font-size: 22px; }
.kb-body h3 { color: #e7f5ff; }
.kb-body p { margin: 10px 0; }
.kb-body ol, .kb-body ul { margin: 14px 0; padding-left: 22px; }
.kb-body li { margin: 9px 0; padding-left: 4px; }
.kb-body li::marker { color: #5ddcff; font-weight: 800; }
.kb-body code { padding: 2px 6px; border: 1px solid rgba(119, 180, 233, .22); border-radius: 5px; color: #bdefff; background: rgba(0,0,0,.18); }
.kb-note { padding: 13px 15px; border-left: 3px solid var(--cyan); border-radius: 0 10px 10px 0; background: rgba(28,217,255,.06); }
.kb-note.warning { border-left-color: var(--orange); background: rgba(255,180,92,.07); }
.kb-promo { margin-top: 20px; padding: 16px 18px; border: 1px solid rgba(78, 178, 255, .32); border-radius: 13px; background: linear-gradient(120deg, rgba(28, 117, 218, .14), rgba(28, 217, 255, .06)); }
.kb-promo strong { display: block; color: #dff7ff; font-size: 14px; }
.kb-promo p { margin: 5px 0 10px; color: #88a9c3; font-size: 13px; }
.kb-promo a { color: #64ddff; font-size: 13px; font-weight: 800; }
.kb-empty { padding: 50px 20px; border: 1px dashed var(--line); border-radius: 16px; color: #7892aa; text-align: center; }
.kb-empty strong { display: block; color: white; font-size: 19px; }
.kb-sources { margin-top: 58px; padding: 30px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); }
.kb-sources h2 { margin: 0 0 10px; color: white; font-size: 21px; }
.kb-sources p { color: #849eb6; font-size: 13px; }
.kb-source-links { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 16px; }
.kb-source-links a { color: #6bdfff; font-size: 12px; }

/* Individual knowledge articles */
.article-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; padding-top: 28px; color: #607b94; font-size: 12px; }
.article-breadcrumb a { color: #8aa4bc; }
.article-breadcrumb a:hover { color: #6bdfff; }
.knowledge-article-hero { padding: 46px 0 44px; border-bottom: 1px solid var(--line); }
.knowledge-article-hero h1 { max-width: 920px; margin: 18px 0 14px; color: white; font-size: clamp(34px, 5vw, 56px); line-height: 1.18; letter-spacing: -.04em; }
.knowledge-article-hero p { max-width: 820px; margin: 0; color: #91a9bf; font-size: 16px; }
.article-trust { display: flex; flex-wrap: wrap; gap: 9px 20px; margin-top: 24px; color: #708ba4; font-size: 12px; }
.article-trust span::before { content: "✓"; margin-right: 7px; color: #48d7b0; font-weight: 900; }
.knowledge-article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 64px; padding-top: 58px; padding-bottom: 82px; }
.knowledge-article-content { min-width: 0; color: #9db3c8; font-size: 15px; line-height: 1.85; }
.knowledge-article-content h2 { margin: 40px 0 14px; color: #f0f8ff; font-size: 25px; line-height: 1.35; }
.knowledge-article-content h2:first-child { margin-top: 0; }
.knowledge-article-content h3 { margin: 28px 0 10px; color: #e4f3ff; font-size: 18px; }
.knowledge-article-content p { margin: 10px 0; }
.knowledge-article-content ol, .knowledge-article-content ul { margin: 15px 0; padding-left: 24px; }
.knowledge-article-content li { margin: 10px 0; padding-left: 4px; }
.knowledge-article-content li::marker { color: #5ddcff; font-weight: 800; }
.knowledge-article-content code { padding: 2px 6px; border: 1px solid rgba(119, 180, 233, .22); border-radius: 5px; color: #bdefff; background: rgba(0,0,0,.18); overflow-wrap: anywhere; }
.article-sidebar { position: sticky; top: 104px; align-self: start; padding: 24px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.03); }
.article-sidebar > strong { color: white; font-size: 17px; }
.article-sidebar ol { margin: 15px 0 22px; padding-left: 20px; color: #829db5; font-size: 13px; }
.article-sidebar li { margin: 9px 0; }
.article-sidebar .btn { width: 100%; padding-inline: 14px; font-size: 12px; }
.article-sources { margin-top: 42px; padding: 24px; border: 1px solid rgba(89, 174, 247, .24); border-radius: 15px; background: rgba(32, 102, 167, .07); }
.article-sources h2 { margin-top: 0; font-size: 21px; }
.article-sources p { color: #829db5; font-size: 13px; }
.article-sources ul { margin-bottom: 0; }
.article-sources a { color: #64ddff; text-decoration: underline; text-decoration-color: rgba(100,221,255,.34); text-underline-offset: 3px; }
.related-knowledge { padding: 74px 0; border-top: 1px solid var(--line); background: rgba(255,255,255,.012); }

.modal, .lightbox { position: fixed; inset: 0; z-index: 1600; display: none; place-items: center; padding: 22px; background: rgba(2, 9, 18, .82); backdrop-filter: blur(10px); }
.modal.show, .lightbox.show { display: grid; }
.modal-card { width: min(600px, 100%); max-height: calc(100vh - 44px); overflow: auto; padding: 30px; border: 1px solid rgba(143, 191, 236, .22); border-radius: 22px; background: #0d2036; box-shadow: var(--shadow); }
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.modal-head h2 { margin: 0; color: white; font-size: 24px; }
.modal-head p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.icon-button { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; color: white; background: rgba(255,255,255,.04); }
.download-list { display: grid; gap: 10px; margin-top: 24px; }
.download-option { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.035); }
.download-option:hover { border-color: rgba(76, 167, 255, .55); background: rgba(46,125,255,.09); }
.download-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px; color: #86e5ff; background: rgba(46,125,255,.14); font-size: 12px; font-weight: 900; }
.download-option strong { display: block; color: white; font-size: 14px; }
.download-option small { color: var(--muted); }
.download-arrow { color: #6edfff; }
.modal-foot { margin-top: 18px; color: #7892ab; font-size: 12px; text-align: center; }
.lightbox img { max-width: min(1400px, 96vw); max-height: 90vh; border: 1px solid rgba(165, 204, 241, .25); border-radius: 16px; box-shadow: var(--shadow); }
.lightbox-close { position: fixed; top: 22px; right: 22px; }

/* Help center */
.docs-hero { padding: 72px 0 50px; border-bottom: 1px solid var(--line); }
.docs-hero-grid { display: grid; grid-template-columns: 1fr 330px; gap: 52px; align-items: end; }
.docs-hero h1 { margin: 0; color: white; font-size: clamp(38px, 5vw, 60px); line-height: 1.12; letter-spacing: -.045em; }
.docs-hero p { max-width: 760px; margin: 20px 0 0; color: var(--muted); font-size: 16px; }
.docs-badge { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.035); }
.docs-badge strong { display: block; color: white; }
.docs-badge span { color: var(--muted); font-size: 13px; }
.help-route-strip { padding: 28px 0 0; }
.help-route-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
.help-route-card { min-width: 0; display: flex; flex-direction: column; gap: 5px; padding: 15px 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.028); transition: border-color .2s ease, background .2s ease, transform .2s ease; }
.help-route-card:hover, .help-route-card.active { border-color: rgba(84, 210, 255, .48); background: rgba(29, 132, 255, .13); transform: translateY(-2px); }
.help-route-card strong { color: #e9f6ff; font-size: 14px; }
.help-route-card span { color: #748ea7; font-size: 11px; line-height: 1.55; }
.help-route-card.active strong { color: #65ddff; }
.docs-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 56px; padding: 54px 0 100px; }
.docs-nav { position: sticky; top: 100px; align-self: start; max-height: calc(100vh - 120px); overflow: auto; padding-right: 14px; }
.docs-nav strong { display: block; margin-bottom: 14px; color: #dfeeff; font-size: 12px; letter-spacing: .13em; text-transform: uppercase; }
.docs-nav a { display: block; margin: 3px 0; padding: 8px 12px; border-left: 2px solid transparent; color: #819ab3; font-size: 13px; }
.docs-nav a:hover, .docs-nav a.active { color: white; border-left-color: var(--cyan); background: rgba(46,125,255,.08); }
.docs-content { min-width: 0; }
.doc-section { scroll-margin-top: 100px; padding: 0 0 70px; margin-bottom: 70px; border-bottom: 1px solid var(--line); }
.doc-section:last-child { border-bottom: 0; }
.doc-kicker { color: #61ddff; font: 800 12px/1 "Segoe UI", sans-serif; letter-spacing: .13em; }
.doc-section h2 { margin: 12px 0 14px; color: white; font-size: clamp(27px, 4vw, 38px); line-height: 1.25; }
.doc-section h3 { margin: 28px 0 10px; color: #eaf5ff; font-size: 19px; }
.doc-section p { margin: 8px 0; color: #9ab0c6; }
.doc-section ol, .doc-section ul { margin: 14px 0 20px; padding-left: 22px; color: #a7bdd1; }
.doc-section li { margin: 7px 0; padding-left: 4px; }
.doc-section li::marker { color: #4ecfff; font-weight: 800; }
.callout { margin: 22px 0; padding: 18px 20px; border-left: 3px solid var(--cyan); border-radius: 0 13px 13px 0; background: rgba(28,217,255,.07); color: #a9c6dc; }
.callout.warning { border-left-color: var(--orange); background: rgba(255,180,92,.07); }
.callout strong { color: white; }
.doc-shot { margin: 28px 0; overflow: hidden; border: 1px solid rgba(143, 191, 236, .23); border-radius: 18px; background: rgba(255,255,255,.035); box-shadow: var(--shadow); }
.doc-shot button { width: 100%; padding: 0; border: 0; background: transparent; }
.doc-shot img { width: 100%; }
.doc-shot figcaption { padding: 13px 17px; color: #7892aa; font-size: 12px; }
.doc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 22px 0; }
.doc-card { padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.025); }
.doc-card h3 { margin: 0 0 7px; font-size: 16px; }
.doc-card p { margin: 0; font-size: 13px; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 19px 0; color: white; font-weight: 700; cursor: pointer; }
.faq details p, .faq details ol { margin-top: 0; padding-bottom: 19px; }
.guide-lead { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 22px 0 32px; }
.guide-lead > div { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.025); }
.guide-lead b { display: block; color: #eaf6ff; font-size: 14px; }
.guide-lead span { display: block; margin-top: 5px; color: #7892aa; font-size: 12px; }
.guide-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.guide-code { padding: 14px 16px; border: 1px solid rgba(95, 183, 255, .24); border-radius: 12px; color: #bdefff; background: rgba(0,0,0,.18); overflow-wrap: anywhere; }
.video-guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 22px 0; }
.video-guide-card { display: flex; flex-direction: column; min-height: 190px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.027); }
.video-guide-card span { color: #5ddcff; font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.video-guide-card h3 { margin: 11px 0 8px; }
.video-guide-card p { flex: 1; margin: 0 0 17px; }
.video-guide-card a { color: #65ddff; font-size: 13px; font-weight: 800; }

/* Software platform */
.platform-hero { padding: 84px 0 66px; }
.platform-hero-grid { display: grid; grid-template-columns: 1fr .9fr; gap: 60px; align-items: center; }
.platform-hero h1 { margin: 0; color: white; font-size: clamp(40px, 5vw, 66px); line-height: 1.1; letter-spacing: -.05em; }
.platform-hero p { margin: 24px 0 30px; color: var(--muted); font-size: 17px; }
.platform-visual { position: relative; min-width: 0; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 28px; background: rgba(255,255,255,.035); }
.platform-visual img { width: 100%; height: auto; aspect-ratio: 997 / 714; object-fit: contain; border-radius: 18px; box-shadow: var(--shadow); }
.feature-matrix { overflow-x: auto; border: 1px solid var(--line-light); border-radius: 18px; background: white; }
.feature-matrix table { width: 100%; border-collapse: collapse; min-width: 780px; }
.feature-matrix th, .feature-matrix td { padding: 16px 18px; border-bottom: 1px solid #e4ebf2; color: #526a81; text-align: left; font-size: 13px; }
.feature-matrix th { color: #10263e; background: #eef4fa; }
.feature-matrix tr:last-child td { border-bottom: 0; }
.yes { color: #168763; font-weight: 800; }
.plan-note { color: #748ba1; font-size: 12px; }

/* Personal scenarios and fnOS product page */
.scenario-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.scenario-card { position: relative; overflow: hidden; }
.scenario-card::after { content: ""; position: absolute; width: 130px; height: 130px; right: -72px; bottom: -72px; border: 1px solid rgba(76, 203, 255, .16); border-radius: 50%; }
.scenario-icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 26px; border: 1px solid rgba(88, 208, 255, .28); border-radius: 13px; color: #b9f1ff; background: linear-gradient(145deg, rgba(42, 130, 255, .24), rgba(28, 217, 255, .08)); font-size: 16px; font-weight: 900; }
.nas-teaser { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: radial-gradient(circle at 84% 28%, rgba(28, 217, 255, .12), transparent 31%), linear-gradient(135deg, rgba(18, 57, 100, .14), transparent 50%); }
.nas-console { min-height: 410px; display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.nas-device, .fnos-core { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 15px; padding: 18px; border: 1px solid rgba(91, 192, 255, .3); border-radius: 16px; background: rgba(7, 25, 44, .72); }
.nas-device-mark, .fnos-core-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 15px; color: #d9f8ff; background: linear-gradient(145deg, #286cff, #12bddc); font-size: 12px; font-weight: 900; letter-spacing: .06em; box-shadow: 0 10px 24px rgba(20, 119, 233, .26); }
.nas-device strong, .nas-device small, .fnos-core strong, .fnos-core small { display: block; }
.nas-device strong, .fnos-core strong { color: white; }
.nas-device small, .fnos-core small { margin-top: 4px; color: #748fa8; font-size: 12px; }
.nas-device em, .fnos-core em { padding: 6px 9px; border-radius: 99px; color: #58e0b8; background: rgba(51, 207, 162, .1); font-size: 11px; font-style: normal; font-weight: 800; }
.nas-paths { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nas-paths span { padding: 17px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.025); }
.nas-paths span:last-child { grid-column: 1 / -1; }
.nas-paths b, .nas-paths small { display: block; }
.nas-paths b { color: #eaf7ff; font-size: 13px; }
.nas-paths small { margin-top: 5px; color: #718ba4; font-size: 11px; }

.fnos-hero { position: relative; overflow: hidden; padding: 88px 0 74px; background: radial-gradient(circle at 79% 25%, rgba(28, 217, 255, .12), transparent 30%), radial-gradient(circle at 18% 42%, rgba(41, 103, 255, .14), transparent 34%); }
.fnos-hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(103, 167, 222, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(103, 167, 222, .035) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent); }
.fnos-hero-grid { position: relative; display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 70px; }
.fnos-hero h1 { margin: 0; color: white; font-size: clamp(42px, 5.3vw, 70px); line-height: 1.08; letter-spacing: -.055em; }
.fnos-hero h1 span { display: block; color: transparent; background: linear-gradient(90deg, #68dcff, #4a83ff); background-clip: text; -webkit-background-clip: text; }
.fnos-hero p { max-width: 700px; margin: 24px 0 30px; color: var(--muted); font-size: 17px; }
.fnos-visual { min-width: 0; padding: 28px; border: 1px solid rgba(116, 187, 242, .25); border-radius: 28px; background: linear-gradient(145deg, rgba(255,255,255,.055), rgba(9, 28, 49, .64)); box-shadow: var(--shadow); }
.fnos-core { padding: 20px; }
.fnos-flow-line { width: 1px; height: 34px; margin: 0 auto; background: linear-gradient(#48cff8, rgba(72, 207, 248, .12)); }
.fnos-endpoints { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; }
.fnos-endpoints > div { padding: 18px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.025); }
.fnos-endpoints span { display: inline-flex; padding: 5px 8px; border-radius: 7px; color: #66ddff; background: rgba(29, 132, 255, .12); font-size: 10px; font-weight: 900; }
.fnos-endpoints strong, .fnos-endpoints small { display: block; }
.fnos-endpoints strong { margin-top: 12px; color: #eaf7ff; font-size: 14px; }
.fnos-endpoints small { margin-top: 4px; color: #708aa3; font-size: 11px; }
.fnos-download-grid { display: grid; grid-template-columns: minmax(0, 1fr) 370px; gap: 60px; align-items: end; }
.fnos-package { margin-top: 28px; padding: 24px; border: 1px solid rgba(84, 198, 255, .28); border-radius: 20px; background: linear-gradient(140deg, rgba(26, 112, 213, .13), rgba(255,255,255,.025)); }
.fnos-package-head { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; }
.fnos-package-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 14px; color: #dff8ff; background: linear-gradient(145deg, #286cff, #12bddc); font-size: 12px; font-weight: 900; }
.fnos-package-head strong, .fnos-package-head small { display: block; }
.fnos-package-head strong { color: white; font-size: 15px; overflow-wrap: anywhere; }
.fnos-package-head small { margin-top: 5px; color: #7993aa; }
.package-badge { padding: 6px 9px; border-radius: 99px; color: #5ee1bb; background: rgba(48, 204, 158, .1); font-size: 10px; font-weight: 900; }
.fnos-download-button { width: 100%; margin-top: 19px; }
.package-hash { display: grid; gap: 5px; margin-top: 15px; color: #6f8aa3; font-size: 10px; }
.package-hash code { color: #91b4ca; overflow-wrap: anywhere; }
.install-address { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.03); }
.install-address > strong { display: block; color: white; font-size: 20px; }
.install-address p { color: #819bb2; font-size: 13px; }
.install-address code { display: block; padding: 14px; border: 1px solid rgba(93, 196, 255, .2); border-radius: 12px; color: #b8edff; background: rgba(0,0,0,.2); font-size: 12px; overflow-wrap: anywhere; }
.install-address .btn { width: 100%; margin-top: 14px; }
.install-address small { display: block; margin-top: 13px; color: #6f899f; line-height: 1.65; }
.fnos-install-note { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; margin-top: 28px; padding: 20px 22px; border-left: 3px solid var(--cyan); border-radius: 0 14px 14px 0; background: rgba(28,217,255,.07); }
.fnos-install-note strong { color: white; }
.fnos-install-note span { color: #8faac0; }
.fnos-install-note code, .step code { color: #92e8ff; overflow-wrap: anywhere; }
.section-light .fnos-install-note strong { color: #0c2138; }
.section-light .fnos-install-note span { color: #526a81; }
.section-light .fnos-install-note code { color: #176ee8; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.hero .reveal, .platform-hero .reveal, .fnos-hero .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } * { animation: none !important; } }

@media (max-width: 1050px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 20px; right: 20px; padding: 20px; flex-direction: column; align-items: flex-start; gap: 14px; border: 1px solid var(--line); border-radius: 16px; background: #0a1a2c; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .hero-grid, .enterprise-grid, .platform-hero-grid, .fnos-hero-grid, .fnos-download-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 48px; }
  .hero::after { left: 35%; }
  .app-frame { max-width: 820px; transform: none; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .docs-hero-grid { grid-template-columns: 1fr; }
  .docs-badge { max-width: 440px; }
  .help-route-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .knowledge-preview-grid { grid-template-columns: 1fr; gap: 42px; }
  .kb-hero-grid { grid-template-columns: 1fr; }
  .kb-overview { max-width: 320px; }
  .kb-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .knowledge-article-layout { grid-template-columns: 1fr; gap: 36px; }
  .article-sidebar { position: static; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .site-header { height: 64px; }
  .brand small { display: none; }
  .nav-actions .btn { display: none; }
  .nav-links { top: 64px; left: 14px; right: 14px; }
  .hero { padding: 68px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 42px; }
  .hero-copy { font-size: 16px; }
  .floating-status { position: static; margin-top: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 70px 0; }
  .card-grid, .showcase-grid, .doc-grid, .scenario-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .cta-panel { grid-template-columns: 1fr; padding: 36px 26px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .change-item { grid-template-columns: 1fr; gap: 7px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
  .docs-hero { padding-top: 54px; }
  .help-route-grid, .guide-lead, .video-guide-grid { grid-template-columns: 1fr; }
  .help-route-grid { gap: 8px; }
  .help-route-card { padding: 13px 15px; }
  .docs-layout { display: block; padding-top: 30px; }
  .docs-nav { position: static; max-height: none; display: flex; gap: 7px; overflow-x: auto; padding: 0 0 20px; margin-bottom: 34px; }
  .docs-nav strong { display: none; }
  .docs-nav a { flex: 0 0 auto; border: 1px solid var(--line); border-radius: 99px; padding: 7px 12px; }
  .docs-nav a:hover, .docs-nav a.active { border-left-color: var(--cyan); }
  .platform-hero { padding-top: 58px; }
  .fnos-hero { padding: 58px 0 54px; }
  .fnos-hero h1 { font-size: 42px; }
  .fnos-visual { padding: 18px; border-radius: 21px; }
  .fnos-endpoints { grid-template-columns: 1fr; }
  .fnos-package-head { grid-template-columns: auto 1fr; }
  .package-badge { grid-column: 2; justify-self: start; }
  .fnos-install-note { grid-template-columns: 1fr; gap: 6px; }
  .knowledge-preview-list span { grid-template-columns: 1fr; gap: 4px; }
  .kb-hero { padding-top: 56px; }
  .kb-card-grid { grid-template-columns: 1fr; }
  .kb-card > a { padding: 19px; }
  .knowledge-article-hero { padding: 38px 0 36px; }
  .knowledge-article-layout { padding-top: 42px; padding-bottom: 62px; }
  .article-trust { display: grid; gap: 7px; }
  .kb-toolbar { top: 68px; padding: 12px; }
  .kb-filters { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 3px; }
  .kb-filters button { flex: 0 0 auto; }
  .kb-article summary { min-height: 0; grid-template-columns: 1fr 32px; gap: 10px; padding: 17px; }
  .kb-tag { grid-column: 1 / -1; }
  .kb-article summary i { grid-column: 2; grid-row: 2; }
  .kb-body { padding: 0 17px 22px; }
  .kb-body h2 { font-size: 19px; }
  .kb-sources { padding: 22px; }
  .back-to-top { width: 43px; height: 43px; border-radius: 13px; }
}