/* ============================================================
   InsightAI · 灵眸智见 — Corporate Site Styles
   Modern · responsive · light-default + dark toggle · bilingual
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color .35s ease, color .35s ease;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }
::selection { background: var(--brand-violet); color: #fff; }

/* ---------- Theme transition guard ---------- */
body, .card, .btn, header, .nav-links a, input, textarea, .tag, .pill {
  transition: background-color .35s ease, color .35s ease, border-color .35s ease, box-shadow .35s ease, transform .25s ease;
}

/* ---------- Typography helpers ---------- */
.cn { font-family: var(--font-cn); }
.nums { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.eyebrow {
  font-family: var(--font-cn);
  font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand-violet);
  display: inline-flex; align-items: center; gap: var(--space-2);
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px; background: var(--brand-lime);
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  margin: var(--space-3) 0 var(--space-4);
}
.section-sub {
  font-family: var(--font-cn);
  color: var(--n-500); font-size: clamp(15px, 2vw, 17px);
  max-width: 760px;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-6); }
section { padding: var(--space-20) 0; position: relative; scroll-margin-top: var(--nav-h); }
.section-head { text-align: center; margin-bottom: var(--space-12); }
.section-head .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- Aurora background ---------- */
.aurora {
  position: absolute; inset: 0; overflow: hidden; z-index: 0; pointer-events: none;
  transform: translateY(var(--ay, 0)); will-change: transform;
}
.aurora span {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5;
  animation: drift 18s ease-in-out infinite alternate;
}
.aurora .a1 { width: 420px; height: 420px; background: var(--brand-violet); top: -120px; left: -80px; }
.aurora .a2 { width: 380px; height: 380px; background: var(--brand-blue); top: 40px; right: -100px; animation-delay: -4s; }
.aurora .a3 { width: 320px; height: 320px; background: var(--brand-lime); bottom: -120px; left: 30%; animation-delay: -9s; opacity: .35; }
.aurora .grid-overlay {
  position: absolute; inset: 0; filter: none; opacity: .4; animation: none;
  background-image:
    linear-gradient(to right, var(--n-200) 1px, transparent 1px),
    linear-gradient(to bottom, var(--n-200) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
}
@keyframes drift {
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.12); }
}
.section-inner { position: relative; z-index: 1; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  height: 46px; padding: 0 22px; border-radius: var(--radius-md);
  font-family: var(--font-cn); font-weight: 600; font-size: 15px; white-space: nowrap;
  transition: background-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--brand-violet); color: #fff; box-shadow: 0 6px 18px rgba(124,58,237,.28); }
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(74,25,119,.35); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--n-200); }
.btn-ghost:hover { border-color: var(--brand-violet); color: var(--brand-violet); transform: translateY(-2px); }
.btn-arrow { transition: transform .2s ease; }
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ---------- Tags & pills ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 13px;
  border-radius: var(--radius-sm); font-family: var(--font-cn);
  font-size: 12.5px; font-weight: 600; background: var(--brand-deep); color: #fff;
}
.tag-blue { background: var(--brand-blue); }
.tag-lime { background: var(--brand-lime); }
.tag-outline { background: transparent; border: 1.5px solid var(--brand-violet); color: var(--brand-violet); }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px;
  border-radius: var(--radius-full); font-family: var(--font-cn);
  font-size: 13.5px; font-weight: 600; background: var(--white);
  border: 1.5px solid var(--n-200); color: var(--ink);
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand-lime); }

/* ---------- Header / Nav ---------- */
header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 100;
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background-color .35s ease, border-color .35s ease, box-shadow .35s ease;
}
header.scrolled { border-bottom-color: var(--n-200); box-shadow: var(--shadow-sm); background: color-mix(in srgb, var(--paper) 86%, transparent); }
.nav-inner { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-6);
  display: flex; align-items: center; gap: var(--space-6); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo { width: 34px; height: 34px; flex: none; }
.brand .wordmark { font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand .wordmark .ai { color: var(--brand-blue); }
.nav-links { display: flex; align-items: center; gap: var(--space-5); margin-left: auto; }
.nav-links a {
  font-family: var(--font-cn); font-size: 14.5px; font-weight: 500; color: var(--n-500);
  position: relative; padding: 6px 0;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; border-radius: 2px;
  background: var(--brand-violet); transition: width .25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); margin-left: var(--space-4); }
.icon-btn {
  width: 40px; height: 40px; border-radius: var(--radius-md); display: grid; place-items: center;
  border: 1.5px solid var(--n-200); background: var(--white); color: var(--ink);
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}
.icon-btn:hover { border-color: var(--brand-violet); color: var(--brand-violet); }
.icon-btn svg { width: 19px; height: 19px; }

/* Language toggle */
.lang-toggle { display: inline-flex; border: 1.5px solid var(--n-200); border-radius: var(--radius-md); overflow: hidden; background: var(--white); }
.lang-toggle button { padding: 0 12px; height: 40px; font-family: var(--font-cn); font-size: 13.5px; font-weight: 600; color: var(--n-500); }
.lang-toggle button.active { background: var(--brand-violet); color: #fff; }

/* Hamburger */
.hamburger { display: none; width: 40px; height: 40px; border-radius: var(--radius-md); border: 1.5px solid var(--n-200); background: var(--white); }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 3px auto; border-radius: 2px; transition: transform .25s ease, opacity .25s ease; }
.hamburger.open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 99;
  background: var(--paper); border-bottom: 1px solid var(--n-200);
  transform: translateY(-12px); opacity: 0; pointer-events: none;
  transition: transform .25s ease, opacity .25s ease; padding: var(--space-4) var(--space-6) var(--space-6);
}
.mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu a { display: block; font-family: var(--font-cn); font-size: 16px; font-weight: 500; padding: 12px 0; border-bottom: 1px solid var(--n-100); color: var(--ink); }
.mobile-menu .btn { width: 100%; margin-top: var(--space-4); }

/* ---------- Hero ---------- */
.hero { padding-top: calc(var(--nav-h) + var(--space-16)); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--space-12); align-items: center; }
.hero-title { font-size: clamp(34px, 5.2vw, 58px); line-height: 1.08; }
.grad { background: linear-gradient(120deg, var(--brand-deep), var(--brand-blue)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-family: var(--font-cn); color: var(--n-500); font-size: clamp(15px, 1.8vw, 18px); margin: var(--space-5) 0; max-width: 560px; }
.hero-cta { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-6); }
.hero-tags { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-6); }
.hero-slogan { margin-top: var(--space-8); font-family: var(--font-display); font-weight: 500; letter-spacing: .04em; color: var(--brand-violet); font-size: 17px; }
.hero-art { position: relative; aspect-ratio: 1/1; }
.hero-art .layer-card {
  position: absolute; border-radius: var(--radius-lg); padding: var(--space-4);
  background: var(--white); border: 1px solid var(--n-200); box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 12px; font-family: var(--font-cn); font-weight: 600;
  animation: floaty 7s ease-in-out infinite;
}
.hero-art .lc1 { top: 6%; left: 4%; border-left: 4px solid var(--gateway); }
.hero-art .lc2 { top: 36%; right: 2%; border-left: 4px solid var(--memory); animation-delay: -2.3s; }
.hero-art .lc3 { bottom: 8%; left: 14%; border-left: 4px solid var(--knowledge); animation-delay: -4.6s; }
.hero-art .lc-emoji { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; color: #fff; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* Hero motif (three-layer + vertical bar) */
.motif { position: absolute; inset: 0; margin: auto; width: 240px; height: 240px; opacity: .9; }

/* Metrics strip */
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-top: var(--space-10); }
.metric { background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.metric .num { font-size: clamp(26px, 3vw, 34px); font-weight: 600; color: var(--brand-violet); }
.metric .lab { font-family: var(--font-cn); color: var(--n-500); font-size: 14px; margin-top: 4px; }
.metric .sub { font-family: var(--font-cn); color: var(--n-400); font-size: 12px; margin-top: 2px; }

/* ---------- Cards grid ---------- */
.cards { display: grid; gap: var(--space-5); }
.cards.c2 { grid-template-columns: repeat(2, 1fr); }
.cards.c3 { grid-template-columns: repeat(3, 1fr); }
.cards.c4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-lg);
  padding: var(--space-6); box-shadow: var(--shadow-md); position: relative; overflow: hidden;
}
.card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--brand-violet), var(--brand-blue)); opacity: 0; transition: opacity .25s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: var(--space-4); color: #fff; }
.card .ic svg { width: 22px; height: 22px; }
.card h3 { font-family: var(--font-cn); font-size: 17px; font-weight: 600; margin-bottom: var(--space-2); }
.card h4 { font-family: var(--font-cn); font-size: 16px; font-weight: 600; margin-bottom: var(--space-2); }
.card p { font-family: var(--font-cn); color: var(--n-500); font-size: 14px; }

/* capability domain header */
.domain { margin: var(--space-10) 0 var(--space-5); display: flex; align-items: center; gap: var(--space-3); }
.domain .bar { width: 4px; height: 22px; border-radius: 4px; background: var(--brand-violet); }
.domain h3 { font-family: var(--font-cn); font-size: 19px; font-weight: 700; }
.domain .idx { font-family: var(--font-mono); color: var(--n-400); font-size: 14px; }

/* ---------- Product / Agent OS ---------- */
.os-wrap { display: grid; grid-template-columns: .9fr 1.1fr; gap: var(--space-12); align-items: center; }
.os-diagram { background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-md); position: relative; }
.os-diagram .os-label { font-family: var(--font-display); font-weight: 700; font-size: 18px; margin-bottom: var(--space-5); }
.os-layer { border-radius: var(--radius-md); padding: var(--space-5); margin-bottom: var(--space-4); border: 1.5px solid var(--n-200); display: flex; align-items: center; gap: var(--space-4); }
.os-layer .os-ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; color: #fff; flex: none; }
.os-layer .os-ic svg { width: 24px; height: 24px; }
.os-layer .os-name { font-family: var(--font-cn); font-weight: 700; font-size: 16px; }
.os-layer .os-role { font-family: var(--font-mono); font-size: 12px; color: var(--n-400); }
.os-layer .os-desc { font-family: var(--font-cn); font-size: 13px; color: var(--n-500); }
.os-layer.gw { background: color-mix(in srgb, var(--gateway) 8%, var(--white)); border-color: color-mix(in srgb, var(--gateway) 35%, var(--n-200)); }
.os-layer.mem { background: color-mix(in srgb, var(--memory) 8%, var(--white)); border-color: color-mix(in srgb, var(--memory) 35%, var(--n-200)); }
.os-layer.kno { background: color-mix(in srgb, var(--knowledge) 8%, var(--white)); border-color: color-mix(in srgb, var(--knowledge) 35%, var(--n-200)); }
/* fused Agent OS diagram (single column + OS window motif) */
.os-wrap.single { grid-template-columns: 1fr; }
.os-wrap.single > .os-diagram { max-width: 820px; margin: 0 auto; width: 100%; }
.os-win-bar { display: flex; align-items: center; gap: 8px; padding-bottom: var(--space-4); margin-bottom: var(--space-5); border-bottom: 1px solid var(--n-100); }
.os-win-bar .wdot { width: 11px; height: 11px; border-radius: 50%; }
.os-win-bar .wdot.r { background: #FF5F57; }
.os-win-bar .wdot.y { background: #FEBC2E; }
.os-win-bar .wdot.g { background: #28C840; }
.os-win-title { font-family: var(--font-cn); font-size: 15px; font-weight: 600; color: var(--n-500); margin-left: 6px; }
.os-note { font-family: var(--font-cn); font-size: 13px; color: var(--n-500); margin-top: var(--space-5); padding-top: var(--space-4); border-top: 1px dashed var(--n-200); line-height: 1.7; }

/* ---------- Architecture ---------- */
.arch-flow {
  background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-xl);
  padding: var(--space-8); box-shadow: var(--shadow-md); margin-bottom: var(--space-8);
}
.arch-flow svg { width: 100%; height: auto; }
.deploy-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.deploy-card { border: 1.5px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-6); background: var(--white); position: relative; }
.deploy-card.featured { border-color: var(--brand-violet); box-shadow: var(--shadow-md); }
.deploy-card .dc-tag { position: absolute; top: -10px; left: var(--space-5); }
.deploy-card h4 { font-family: var(--font-cn); font-size: 17px; margin-bottom: var(--space-2); }
.deploy-card p { font-family: var(--font-cn); font-size: 14px; color: var(--n-500); }

/* ---------- Ecosystem ---------- */
.eco-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: start; }
.eco-sovereign { background: linear-gradient(135deg, var(--brand-deep), var(--brand-violet)); color: #fff; border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-lg); }
.eco-sovereign h3 { font-family: var(--font-cn); font-size: 22px; margin-bottom: var(--space-3); }
.eco-sovereign p { font-family: var(--font-cn); font-size: 14.5px; opacity: .92; }
.eco-compat h3 { font-family: var(--font-cn); font-size: 18px; margin-bottom: var(--space-5); }
.compat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.compat-item { border: 1.5px solid var(--n-200); border-radius: var(--radius-md); padding: var(--space-4); background: var(--white); }
.compat-item .ci-t { font-family: var(--font-cn); font-weight: 700; font-size: 14px; color: var(--brand-violet); margin-bottom: 4px; }
.compat-item .ci-v { font-family: var(--font-cn); font-size: 13.5px; color: var(--n-500); }
.eco-note { margin-top: var(--space-8); font-family: var(--font-cn); font-size: 14px; color: var(--n-500); text-align: center; }


/* ---------- Roadmap ---------- */
.timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); }
.tl-card { border: 1.5px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-5); background: var(--white); position: relative; }
.tl-card .tl-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--brand-violet); margin-bottom: var(--space-3); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-violet) 22%, transparent); }
.tl-card.alt .tl-dot { background: var(--brand-blue); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-blue) 22%, transparent); }
.tl-card .tl-ver { font-family: var(--font-mono); font-size: 12px; color: var(--n-400); }
.tl-card h4 { font-family: var(--font-cn); font-size: 15.5px; margin: 4px 0 6px; }
.tl-card p { font-family: var(--font-cn); font-size: 13px; color: var(--n-500); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); margin-bottom: var(--space-10); }
.about-card { border: 1.5px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-6); background: var(--white); }
.about-card .ac-t { font-family: var(--font-cn); font-weight: 700; font-size: 16px; color: var(--brand-violet); margin-bottom: var(--space-2); }
.about-card .ac-d { font-family: var(--font-cn); font-size: 14px; color: var(--n-500); }
.about-meta { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
.snapshot-list li { font-family: var(--font-cn); font-size: 14.5px; padding: 10px 0; border-bottom: 1px solid var(--n-100); display: flex; gap: 10px; align-items: baseline; }
.snapshot-list li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-lime); flex: none; margin-top: 7px; }
.market-card { background: linear-gradient(135deg, color-mix(in srgb, var(--brand-blue) 12%, var(--white)), var(--white)); border: 1.5px solid color-mix(in srgb, var(--brand-blue) 30%, var(--n-200)); border-radius: var(--radius-lg); padding: var(--space-6); }
.market-card .mc-t { font-family: var(--font-cn); font-weight: 700; margin-bottom: var(--space-3); }
.market-card p { font-family: var(--font-cn); font-size: 14px; color: var(--n-500); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); max-width: 480px; margin: 0 auto var(--space-8); align-items: start; }
#contact { padding-bottom: var(--space-10); }
.contact-info .ci-row { display: flex; align-items: center; gap: 12px; margin-bottom: var(--space-5); font-family: var(--font-cn); }
.contact-info .ci-ic { width: 42px; height: 42px; border-radius: 12px; background: color-mix(in srgb, var(--brand-violet) 10%, var(--white)); display: grid; place-items: center; color: var(--brand-violet); flex: none; }
.contact-info .ci-ic svg { width: 20px; height: 20px; }
.contact-info .ci-row .ci-l { font-size: 12.5px; color: var(--n-400); }
.contact-info .ci-row .ci-v { font-size: 15px; font-weight: 600; }

/* ---------- Footer ---------- */
footer { background: var(--n-900); color: var(--n-600); padding: var(--space-16) 0 var(--space-8); position: relative; overflow: hidden; }
footer .aurora .a1 { background: var(--brand-violet); opacity: .25; }
footer .aurora .a2 { background: var(--brand-blue); opacity: .2; }
.footer-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-8); }
.footer-brand .logo-w { width: 38px; height: 38px; margin-bottom: var(--space-4); }
.footer-brand .fb-name { font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 18px; }
.footer-brand .fb-slogan { font-family: var(--font-display); color: var(--n-400); margin-top: 6px; letter-spacing: .03em; }
.footer-brand .fb-company { font-family: var(--font-cn); color: var(--n-500); font-size: 13.5px; margin-top: var(--space-4); }
.footer-col h4 { font-family: var(--font-cn); color: var(--n-300); font-size: 14px; margin-bottom: var(--space-4); }
.footer-col a { display: block; font-family: var(--font-cn); font-size: 14px; color: var(--n-500); padding: 6px 0; transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-bottom { position: relative; z-index: 1; margin-top: var(--space-12); padding-top: var(--space-6); border-top: 1px solid var(--n-800); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); font-family: var(--font-cn); font-size: 13px; color: var(--n-500); }
.footer-social { display: flex; gap: var(--space-3); }
.footer-social a { width: 38px; height: 38px; border-radius: 10px; background: var(--n-800); display: grid; place-items: center; color: var(--n-300); transition: background-color .2s ease, color .2s ease; }
.footer-social a:hover { background: var(--brand-violet); color: #fff; }
.footer-social svg { width: 18px; height: 18px; }
.footer-beian { position: relative; z-index: 1; margin-top: var(--space-4); font-family: var(--font-cn); font-size: 12.5px; color: var(--n-500); display: flex; flex-direction: column; align-items: center; gap: 6px; }
.footer-beian .beian-link { display: inline-flex; align-items: center; color: var(--n-400); text-decoration: none; border-bottom: 1px solid transparent; transition: color .2s ease, border-color .2s ease; }
.footer-beian .beian-link:hover { color: #fff; border-color: var(--n-600); }
.footer-beian .beian-badge { height: 16px; width: auto; margin-right: 6px; vertical-align: middle; border: 0; }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transition: opacity .6s ease, transform .6s ease, clip-path .6s ease; }
[data-reveal="up"] { transform: translateY(18px); }
[data-reveal="left"] { transform: translateX(-28px); }
[data-reveal="right"] { transform: translateX(28px); }
[data-reveal="scale"] { transform: scale(.94); }
[data-reveal="clip"] { clip-path: inset(0 100% 0 0); }
[data-reveal].in { opacity: 1; transform: none; clip-path: none; }

/* ---------- Scroll progress bar ---------- */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 0%; z-index: 200; background: linear-gradient(90deg, var(--brand-violet), var(--brand-blue), var(--brand-lime)); transition: width .1s linear; }

/* ---------- Architecture data-flow animation ---------- */
.flow-line { stroke-dasharray: 7 7; animation: flowdash 1s linear infinite; }
@keyframes flowdash { to { stroke-dashoffset: -14; } }

/* ---------- Language fade ---------- */
body.lang-switch { opacity: .35; }
body { transition: opacity .18s ease, background-color .35s ease, color .35s ease; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; margin: 0 auto; width: 100%; }
  .os-wrap { grid-template-columns: 1fr; }
  .eco-grid { grid-template-columns: 1fr; }
  .cards.c4 { grid-template-columns: repeat(2, 1fr); }
  .cards.c3 { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .nav-links, .nav-actions .lang-toggle, .nav-actions .icon-btn.theme-btn, .nav-actions .btn { display: none; }
  .hamburger { display: block; }
  .nav-actions { margin-left: auto; }
  section { padding: var(--space-16) 0; }
  .container { padding: 0 var(--space-5); }
  .cards.c2, .cards.c3, .cards.c4 { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr; }
  .deploy-cards { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-meta { grid-template-columns: 1fr; }
  .compat-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { flex: 1; }
}

/* Touch devices: disable hover transforms */
@media (hover: none) {
  .card:hover, .btn:hover, .pill:hover { transform: none; }
  .card:hover::before { opacity: 0; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1 !important; transform: none !important; clip-path: none !important; }
}

/* ============================================================
   Visual Redesign · 公共组件层（visual-redesign 分支）
   统一面板 / 网格 / 区块连接母题 / 分栏 / 标签云 / 图表 / 引用
   ============================================================ */

/* ---------- Unified panel base ---------- */
.panel {
  background: var(--white);
  border: 1px solid var(--n-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  position: relative;
}
.panel--gateway   { background: color-mix(in srgb, var(--gateway) 5%, var(--white));    border-color: color-mix(in srgb, var(--gateway) 30%, var(--n-200)); }
.panel--memory    { background: color-mix(in srgb, var(--memory) 5%, var(--white));     border-color: color-mix(in srgb, var(--memory) 30%, var(--n-200)); }
.panel--knowledge { background: color-mix(in srgb, var(--knowledge) 6%, var(--white));  border-color: color-mix(in srgb, var(--knowledge) 30%, var(--n-200)); }
.panel--gateway::before, .panel--memory::before, .panel--knowledge::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.panel--gateway::before   { background: var(--gateway); }
.panel--memory::before    { background: var(--memory); }
.panel--knowledge::before { background: var(--knowledge); }

/* ---------- Responsive auto grid ---------- */
.grid-auto { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(var(--min, 260px), 1fr)); }

/* ---------- Section separator motif ---------- */
.section-sep { display: flex; align-items: center; justify-content: center; gap: 14px; padding: var(--space-2) 0; position: relative; }
.section-sep::before {
  content: ""; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(560px, 80%); height: 1px;
  background: linear-gradient(90deg, transparent, var(--n-200) 18%, var(--n-200) 82%, transparent);
}
.section-sep .slab { width: 9px; height: 9px; transform: rotate(45deg); border-radius: 2px; position: relative; z-index: 1; }
.section-sep .slab.v { background: var(--brand-violet); box-shadow: 0 0 0 5px var(--paper), 0 0 16px 2px color-mix(in srgb, var(--brand-violet) 55%, transparent); }
.section-sep .slab.b { background: var(--brand-blue);   box-shadow: 0 0 0 5px var(--paper), 0 0 16px 2px color-mix(in srgb, var(--brand-blue) 55%, transparent); }
.section-sep .slab.l { background: var(--brand-lime);   box-shadow: 0 0 0 5px var(--paper), 0 0 16px 2px color-mix(in srgb, var(--brand-lime) 55%, transparent); }

/* ---------- Split two-column utility ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.split.alt { grid-template-columns: .9fr 1.1fr; }
.split.reverse > :first-child { order: 2; }

/* ---------- Icon combo grid ---------- */
.icon-combo { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: var(--space-3); }
.icon-combo .ic-cell { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--radius-md); background: var(--white); border: 1px solid var(--n-200); font-family: var(--font-cn); font-size: 13.5px; font-weight: 600; }
.icon-combo .ic-cell .dotc { width: 10px; height: 10px; border-radius: 3px; flex: none; }

/* ---------- Quote / citation band ---------- */
.quote { border-left: 4px solid var(--brand-violet); background: color-mix(in srgb, var(--brand-violet) 6%, var(--white)); border-radius: 0 var(--radius-lg) var(--radius-lg) 0; padding: var(--space-5) var(--space-6); font-family: var(--font-cn); color: var(--n-600); font-size: 15px; line-height: 1.7; }
.quote.blue { border-left-color: var(--brand-blue);  background: color-mix(in srgb, var(--brand-blue) 6%, var(--white)); }
.quote.lime { border-left-color: var(--brand-lime);  background: color-mix(in srgb, var(--brand-lime) 8%, var(--white)); }

/* ---------- Tag cloud / chips ---------- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius-full); font-family: var(--font-cn); font-size: 14px; font-weight: 600; background: var(--white); border: 1.5px solid var(--n-200); color: var(--n-500); cursor: pointer; transition: all .2s ease; }
.chip:hover { border-color: var(--brand-violet); color: var(--brand-violet); }
.chip.is-active { background: var(--brand-violet); border-color: var(--brand-violet); color: #fff; box-shadow: 0 4px 14px rgba(124,58,237,.3); }

/* ---------- Capability tile (lightweight) ---------- */
.cap { background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-5); box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; position: relative; overflow: hidden; }
.cap::after { content: ""; position: absolute; left: 0; bottom: 0; height: 3px; width: 100%; background: linear-gradient(90deg, var(--brand-violet), var(--brand-blue), var(--brand-lime)); transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.cap:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--brand-violet) 30%, var(--n-200)); }
.cap:hover::after { transform: scaleX(1); }
.cap .cap-ic { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; color: #fff; margin-bottom: var(--space-3); }
.cap .cap-ic svg { width: 21px; height: 21px; }
.cap h4 { font-family: var(--font-cn); font-size: 15.5px; font-weight: 600; margin-bottom: 6px; }
.cap p { font-family: var(--font-cn); font-size: 13px; color: var(--n-500); }

/* ---------- Nav spark ---------- */
.nav-spark { width: 8px; height: 8px; border-radius: 50%; background: var(--brand-lime); margin-left: 4px; animation: sparkpulse 2s ease-out infinite; }
@keyframes sparkpulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--brand-lime) 70%, transparent); } 70% { box-shadow: 0 0 0 8px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

/* ---------- Brand hairline (hero top / footer top) ---------- */
.brand-line { height: 3px; background: linear-gradient(90deg, var(--brand-violet), var(--brand-blue), var(--brand-lime)); background-size: 200% 100%; animation: brandflow 6s linear infinite; }
/* footer 分割线：贴在 contact(浅) 与 footer(深) 的颜色分界处，不压下方文字 */
footer .brand-line { position: absolute; top: 0; left: 0; right: 0; z-index: 2; }
#topBrandLine { position: fixed; top: 0; left: 0; right: 0; z-index: 60; opacity: 0; transition: opacity .35s ease; }
#topBrandLine.show { opacity: 1; }
@keyframes brandflow { to { background-position: 200% 0; } }

/* ============================================================
   Visual Redesign · Hero & Pain 专用样式
   ============================================================ */
.hero-copy { position: relative; z-index: 1; }
.hero-art .layer-card { will-change: transform; }
.metrics .metric { text-align: left; }
.metrics .metric .num { display: inline-flex; align-items: baseline; flex-wrap: wrap; gap: 2px; }

/* Pain: split + crack list */
.pain-lead { text-align: left; }
.pain-lead .section-title { text-align: left; margin-left: 0; }
.pain-intro { font-family: var(--font-cn); color: var(--n-500); font-size: 16px; margin-top: var(--space-4); max-width: 440px; line-height: 1.75; }
.pain-list { position: relative; display: grid; gap: var(--space-4); }
.pain-list::before { content: ""; position: absolute; left: 21px; top: 20px; bottom: 20px; width: 2px; border-radius: 2px; background: linear-gradient(180deg, var(--brand-violet), var(--brand-blue), var(--brand-lime)); opacity: .25; }
.pain-item { display: grid; grid-template-columns: 44px 1fr; gap: var(--space-4); align-items: start; }
.pain-item .pi-no { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-family: var(--font-mono); font-weight: 600; font-size: 15px; color: #fff; background: var(--brand-violet); position: relative; z-index: 1; box-shadow: 0 0 0 5px color-mix(in srgb, var(--brand-violet) 18%, transparent); }
.pain-item:nth-child(2) .pi-no { background: var(--brand-blue);  box-shadow: 0 0 0 5px color-mix(in srgb, var(--brand-blue) 18%, transparent); }
.pain-item:nth-child(3) .pi-no { background: var(--brand-deep); }
.pain-item:nth-child(4) .pi-no { background: var(--brand-lime);  box-shadow: 0 0 0 5px color-mix(in srgb, var(--brand-lime) 18%, transparent); }
.pain-item .pi-body { background: var(--white); border: 1px solid var(--n-200); border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5); box-shadow: var(--shadow-sm); }
.pain-item h3 { font-family: var(--font-cn); font-size: 16.5px; font-weight: 700; margin-bottom: 4px; }
.pain-item p { font-family: var(--font-cn); font-size: 13.5px; color: var(--n-500); }

@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; gap: var(--space-8); }
}

/* ============================================================
   Visual Redesign · Product & Gateway 专用样式
   ============================================================ */
.product-subs { display: grid; gap: var(--space-4); }
.sub-card { display: flex; align-items: flex-start; gap: var(--space-4); padding: var(--space-5); }
.sub-card .sub-ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; color: #fff; flex: none; }
.sub-card .sub-ic svg { width: 22px; height: 22px; }
.sub-card .sub-name { font-family: var(--font-cn); font-weight: 700; font-size: 16px; }
.sub-card .sub-role { font-family: var(--font-mono); font-size: 12px; color: var(--n-400); }
.sub-card .sub-desc { font-family: var(--font-cn); font-size: 13px; color: var(--n-500); margin-top: 2px; }

/* ============================================================
   Visual Redesign · Arch & Ecosystem 专用样式
   ============================================================ */

/* Ecosystem: 兼容瓦片图标配色 */
.cap-ic.gw  { background: linear-gradient(135deg, var(--brand-violet), var(--brand-blue)); }
.cap-ic.mem { background: linear-gradient(135deg, var(--brand-blue), var(--brand-lime)); }
.cap-ic.kno { background: linear-gradient(135deg, var(--brand-lime), var(--brand-blue)); }

/* 保住 deploy  featured 紫边（优先级高于 .panel） */
.deploy-card.featured { border-color: var(--brand-violet); box-shadow: var(--shadow-md); }

/* ============================================================
   Visual Redesign · Gateway 多模态能力矩阵（8 大能力）
   ============================================================ */
.mm-grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(4, 1fr); margin-top: var(--space-4); }
.mm-cap {
  background: var(--white);
  border: 1px solid var(--n-200);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-5);
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: var(--space-3);
  align-items: start;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.mm-cap:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.mm-cap .mm-ic {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  color: #fff; flex: none;
}
.mm-cap .mm-ic svg { width: 22px; height: 22px; }
.mm-cap .mm-n { font-family: var(--font-mono); font-size: 14.5px; font-weight: 700; letter-spacing: .02em; }
.mm-cap .mm-d { font-family: var(--font-cn); font-size: 12.5px; color: var(--n-500); margin-top: 2px; line-height: 1.55; }

/* ============================================================
   Visual Redesign · Diff & About 专用样式
   ============================================================ */


/* About: 三面板（愿景/使命/价值观） */
.about-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-12); }
.about-cards .ac-card {
  padding: var(--space-10) var(--space-7);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  transition: transform .25s ease, box-shadow .25s ease;
  position: relative;
}
.about-cards .ac-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.about-cards .ac-card .ac-idx {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 700;
  letter-spacing: .15em;
  color: var(--n-400);
}
.about-cards .panel--gateway .ac-idx   { color: var(--gateway); }
.about-cards .panel--memory .ac-idx    { color: var(--memory); }
.about-cards .panel--knowledge .ac-idx { color: var(--knowledge); }
.about-cards .ac-card .ac-ic {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  margin-top: var(--space-1);
}
.about-cards .panel--gateway .ac-ic   { background: color-mix(in srgb, var(--gateway) 14%, var(--white));   color: var(--gateway); }
.about-cards .panel--memory .ac-ic    { background: color-mix(in srgb, var(--memory) 14%, var(--white));    color: var(--memory); }
.about-cards .panel--knowledge .ac-ic { background: color-mix(in srgb, var(--knowledge) 14%, var(--white)); color: var(--knowledge); }
.about-cards .ac-card .ac-ic svg { width: 28px; height: 28px; }
.about-cards .ac-t { font-family: var(--font-cn); font-weight: 700; font-size: 19px; letter-spacing: .04em; }
.about-cards .panel--gateway .ac-t   { color: var(--gateway); }
.about-cards .panel--memory .ac-t    { color: var(--memory); }
.about-cards .panel--knowledge .ac-t { color: var(--knowledge); }
.about-cards .ac-d { font-family: var(--font-cn); font-size: 14.5px; color: var(--n-600); line-height: 1.85; max-width: 280px; }

@media (max-width: 768px) {
  .about-cards { grid-template-columns: 1fr; }
  .mm-grid { grid-template-columns: repeat(2, 1fr); }
}