/* Rinoven website. Colours come from the logo (templates/Rinoven/brand): navy #022448 and teal #04AFB4,
   the same tokens as the deck and factsheet. Bilingual copy sits side by side as lang="en" / lang="zh"
   elements; <html data-lang> decides which one shows. */
:root {
  --navy:#022448; --navy-2:#05305c; --deep:#011a35; --teal:#04afb4; --teal-ink:#04797d;
  --ink:#022448; --body:#2e3a48; --muted:#66707c; --line:#d8dee5; --paper:#fafbfc; --tint:#eef2f6;
  --on-dark:#b9c6d6; --line-dark:rgba(185,198,214,.18); --neg:#b0412e;
  --sans:'Inter','Noto Sans TC','PingFang TC','Microsoft JhengHei',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --wrap:1160px; --gutter:24px;
}
* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body { min-height:100vh; display:flex; flex-direction:column; background:var(--paper); color:var(--body); font-family:var(--sans); font-size:16px; line-height:1.6;
       -webkit-font-smoothing:antialiased; }
html[data-lang="en"] [lang="zh"], html[data-lang="zh"] [lang="en"] { display:none !important; }
html[data-lang="zh"] body { letter-spacing:.02em; }
/* Chinese headings break at punctuation, not mid-phrase; anywhere is the fallback if a phrase overflows. */
html[data-lang="zh"] :is(h1, h2) { word-break:keep-all; overflow-wrap:anywhere; }
h2 { text-wrap:balance; }
a { color:inherit; text-decoration:none; }
img { display:block; max-width:100%; }
main { flex:1; }
.wrap { max-width:var(--wrap); margin:0 auto; padding:0 var(--gutter); }
.mono, .label, .num { font-family:var(--mono); }
.num { font-variant-numeric:tabular-nums; }
.pos { color:var(--teal-ink); }
.dark .pos { color:var(--teal); }

/* Header */
.site-header { position:sticky; top:0; z-index:50; background:rgba(2,36,72,.94); backdrop-filter:blur(10px);
               border-bottom:1px solid var(--line-dark); }
.site-header .wrap { display:flex; align-items:center; height:68px; gap:32px; }
.site-header .logo img { height:26px; width:auto; }
.site-nav { display:flex; gap:28px; margin-left:auto; }
.site-nav a { color:var(--on-dark); font-size:14px; letter-spacing:.02em; padding:6px 0; border-bottom:1px solid transparent;
              transition:color .2s, border-color .2s; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color:#fff; border-color:var(--teal); }
.lang { display:flex; font-family:var(--mono); font-size:12px; border:1px solid var(--line-dark); border-radius:2px; }
.lang button { background:none; border:0; color:var(--on-dark); padding:5px 9px; cursor:pointer; font:inherit; }
.lang button[aria-pressed="true"] { background:var(--teal); color:var(--deep); }
.menu-btn { display:none; background:none; border:0; color:#fff; cursor:pointer; padding:6px; margin-left:auto; }
.menu-btn svg { display:block; }

/* Dark bands: hero, page heads, CTA. A faint grid gives the technical texture. */
.dark { background:var(--navy); color:var(--on-dark); position:relative; overflow:hidden; }
.dark::before { content:''; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(var(--line-dark) 1px, transparent 1px), linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size:64px 64px; mask-image:linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.08)); -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.08)); }
.dark > * { position:relative; }
.dark h1, .dark h2, .dark h3 { color:#fff; }
.label { display:inline-block; font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--teal-ink); margin-bottom:18px; }
.dark .label { color:var(--teal); }

.hero { min-height:min(calc(100vh - 68px), 820px); display:flex; align-items:center; padding:96px 0 120px; }
.hero h1 { font-size:clamp(40px, 6.4vw, 80px); font-weight:600; line-height:1.04; letter-spacing:-.03em; max-width:12ch; }
html[data-lang="zh"] .hero h1 { letter-spacing:.02em; line-height:1.18; max-width:9em; }
.hero .wrap { width:100%; }
.hero .btns { margin-top:44px; }
.hero .lead { font-size:clamp(17px, 1.8vw, 20px); max-width:36em; margin:28px 0 40px; }
.hero-line { position:absolute; left:0; right:0; bottom:0; height:62%; width:100%; pointer-events:none;
  mask-image:linear-gradient(90deg, rgba(0,0,0,.3), rgba(0,0,0,.3) 40%, #000 80%); -webkit-mask-image:linear-gradient(90deg, rgba(0,0,0,.3), rgba(0,0,0,.3) 40%, #000 80%); }
.hero-line path.line { fill:none; stroke:var(--teal); stroke-width:1.6; vector-effect:non-scaling-stroke; }
.hero-line path.area { fill:url(#heroFill); }
.hero-line .draw { stroke-dasharray:1; stroke-dashoffset:1; animation:draw 3.2s cubic-bezier(.4,0,.2,1) .2s forwards; }
@keyframes draw { to { stroke-dashoffset:0; } }
.hero-meta { position:absolute; right:var(--gutter); bottom:28px; font-family:var(--mono); font-size:11px; letter-spacing:.08em; color:var(--on-dark); opacity:.7; }

.page-head { padding:96px 0 72px; }
.page-head h1 { font-size:clamp(34px, 4.6vw, 56px); font-weight:600; letter-spacing:-.02em; line-height:1.1; max-width:18ch; }
.page-head .lead { font-size:18px; max-width:40em; margin-top:22px; }

/* Buttons */
.btns { display:flex; gap:12px; flex-wrap:wrap; }
.btn { display:inline-flex; align-items:center; gap:10px; font-size:14px; letter-spacing:.03em; padding:13px 22px; border-radius:2px;
       border:1px solid var(--teal); transition:background .2s, color .2s; }
.btn.primary { background:var(--teal); color:var(--deep); font-weight:600; }
.btn.primary:hover { background:#3cc7cb; }
.btn.ghost { color:#fff; border-color:var(--line-dark); }
.btn.ghost:hover { border-color:var(--teal); }
.btn.line { color:var(--ink); border-color:var(--ink); }
.btn.line:hover { background:var(--ink); color:#fff; }
.arrow::after { content:'→'; font-family:var(--mono); }

/* Sections */
.sec { padding:104px 0; }
.sec + .sec { border-top:1px solid var(--line); }
.sec.tint { background:var(--tint); border-top:0; }
.sec-head { display:grid; grid-template-columns:minmax(0, 7fr) minmax(0, 5fr); gap:48px; align-items:end; margin-bottom:56px; }
.sec-head > :only-child { grid-column:1 / -1; }
h2 { font-size:clamp(28px, 3.4vw, 40px); font-weight:600; color:var(--ink); letter-spacing:-.02em; line-height:1.15; }
.sec-head p { color:var(--muted); font-size:17px; }
.sec-head .end { justify-self:end; }
h3 { font-size:19px; font-weight:600; color:var(--ink); line-height:1.3; margin-bottom:10px; }
.muted { color:var(--muted); }
.small { font-size:13px; line-height:1.55; }

/* Key facts strip */
.facts { display:grid; grid-template-columns:repeat(5, 1fr); border-top:1px solid var(--line); }
.facts > div { padding:28px 24px 0 0; }
.facts > div + div { padding-left:24px; border-left:1px solid var(--line); }
.facts .v { font-family:var(--mono); font-size:clamp(26px, 3vw, 36px); color:var(--ink); letter-spacing:-.02em; line-height:1.1; }
.facts .k { font-size:14px; color:var(--muted); margin-top:10px; }

/* Numbered cards */
.grid { display:grid; gap:1px; background:var(--line); border:1px solid var(--line); }
.grid.c3 { grid-template-columns:repeat(3, 1fr); }
.grid.c2 { grid-template-columns:repeat(2, 1fr); }
.grid.c4 { grid-template-columns:repeat(4, 1fr); }
.cell { background:var(--paper); padding:36px 32px 40px; }
.sec.tint .cell { background:#fff; }
.cell .idx { font-family:var(--mono); font-size:12px; color:var(--teal-ink); letter-spacing:.1em; display:block; margin-bottom:40px; }
.cell p { color:var(--muted); font-size:15px; }
ul.ticks { list-style:none; }
ul.ticks li { position:relative; padding-left:22px; margin-bottom:8px; color:var(--muted); font-size:15px; }
ul.ticks li::before { content:''; position:absolute; left:2px; top:.7em; width:8px; height:1px; background:var(--teal); }

/* Black swans */
.swan-sum { display:flex; align-items:baseline; gap:20px; flex-wrap:wrap; }
.swan-sum .big { font-family:var(--mono); font-size:clamp(56px, 8vw, 96px); color:var(--teal); line-height:1; letter-spacing:-.04em; }
table.swan-list { width:100%; border-collapse:collapse; margin-top:8px; }
table.swan-list td { padding:18px 0; border-top:1px solid var(--line-dark); color:#fff; font-size:17px; }
table.swan-list tr:last-child td { border-bottom:1px solid var(--line-dark); }
table.swan-list td.d { font-family:var(--mono); font-size:13px; color:var(--teal); letter-spacing:.08em; width:180px; }
table.swan-list td.r { font-family:var(--mono); font-size:22px; color:var(--teal); text-align:right; white-space:nowrap; }
table.swan-list tr.pre td.r { font-size:15px; color:var(--on-dark); }
table.swan-list tr { transition:background .2s; }
table.swan-list tr:hover { background:rgba(4,175,180,.06); }
.foot-note { font-size:12px; color:var(--on-dark); opacity:.8; margin-top:20px; max-width:60em; }

/* Strategy pillars: line icon, title, short text */
.pillars { display:grid; grid-template-columns:repeat(3, 1fr); gap:56px; }
.pillars svg { width:120px; height:80px; display:block; margin-bottom:36px; overflow:visible; }
.pillars svg .s { fill:none; stroke:var(--ink); stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.pillars svg .f { fill:none; stroke:var(--line); stroke-width:1.5; }
.pillars svg .a { fill:var(--teal); }
.pillars svg .ad { fill:none; stroke:var(--teal); stroke-width:2; stroke-dasharray:4 4; }
.pillars h3 { font-size:21px; margin-bottom:14px; }
.pillars p { color:var(--muted); font-size:15px; }

/* Risk checklist */
.checklist { list-style:none; display:grid; grid-template-columns:1fr 1fr; column-gap:56px; border-top:1px solid var(--ink); }
.checklist li { display:flex; gap:16px; align-items:baseline; padding:18px 0; border-bottom:1px solid var(--line); color:var(--ink); font-size:16px; }
.checklist li::before { content:''; flex:none; width:6px; height:12px; margin:0 6px 0 4px; position:relative; top:-1px;
  border:solid var(--teal-ink); border-width:0 2px 2px 0; transform:rotate(45deg); }

.quote { display:grid; grid-template-columns:auto 1fr; gap:32px; align-items:start; }
.quote blockquote { font-size:clamp(22px, 2.6vw, 30px); line-height:1.4; color:#fff; font-weight:500; letter-spacing:-.01em; max-width:30em; }
.quote cite { display:block; margin-top:18px; font-family:var(--mono); font-size:12px; font-style:normal; color:var(--on-dark); letter-spacing:.06em; }
.quote .mark { font-family:var(--mono); font-size:72px; line-height:.8; color:var(--teal); }

.split { display:grid; grid-template-columns:minmax(0, 7fr) minmax(0, 5fr); gap:56px; align-items:start; }

/* SMA */
.arch { display:grid; grid-template-columns:1fr 200px 1fr; align-items:stretch; }
.node { border:1px solid var(--line); background:#fff; padding:32px; }
.node.client { border:2px solid var(--ink); }
.node .tag { font-family:var(--mono); font-size:11px; letter-spacing:.12em; color:var(--teal-ink); text-transform:uppercase; }
.node h3 { margin-top:12px; }
.link { display:flex; flex-direction:column; justify-content:center; align-items:center; gap:10px; padding:0 12px; text-align:center; }
.link .wire { width:100%; height:1px; background:repeating-linear-gradient(90deg, var(--teal) 0 6px, transparent 6px 11px); position:relative; animation:flowx 1.2s linear infinite; background-size:11px 1px; }
@keyframes flowx { to { background-position:-11px 0; } }
.link .wire.back { animation-direction:reverse; }
.link span { font-family:var(--mono); font-size:11px; letter-spacing:.06em; color:var(--muted); }
.link b { font-family:var(--mono); font-size:11px; color:var(--neg); font-weight:500; letter-spacing:.06em; }
.gets { display:grid; grid-template-columns:repeat(4, 1fr); border-top:1px solid var(--ink); }
.gets > div { padding:22px 20px 0 0; color:var(--ink); font-size:17px; font-weight:500; }
.gets .idx { display:block; font-family:var(--mono); font-size:12px; color:var(--teal-ink); letter-spacing:.1em; margin-bottom:14px; }
.mail { display:inline-block; margin-top:40px; font-size:clamp(20px, 3.4vw, 36px); color:#fff; border-bottom:1px solid var(--teal); padding-bottom:6px; transition:color .2s; }
.mail:hover { color:var(--teal); }
.contact-head { padding:120px 0 112px; }

/* CTA + footer */
.cta { padding:96px 0; }
.cta .wrap { display:flex; justify-content:space-between; align-items:center; gap:40px; flex-wrap:wrap; }
.cta h2 { max-width:16em; }
.site-footer { background:var(--deep); color:var(--on-dark); font-size:13px; padding:48px 0 36px; }
.site-footer .top { display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap; padding-bottom:32px; border-bottom:1px solid var(--line-dark); }
.site-footer .top img { height:24px; width:auto; }
.site-footer .top a:hover { color:#fff; }
.site-footer .legal { padding-top:24px; font-size:12px; line-height:1.7; opacity:.75; max-width:70em; }
.site-footer .legal p + p { margin-top:10px; }

/* Reveal on scroll */
.rv { opacity:0; transform:translateY(16px); transition:opacity .7s ease, transform .7s ease; }
.rv.in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity:1; transform:none; transition:none; }
  .hero-line .draw { animation:none; stroke-dashoffset:0; }
  .link .wire { animation:none; }
  html { scroll-behavior:auto; }
}

/* Tablet */
@media (max-width: 960px) {
  .sec-head, .split, .quote { grid-template-columns:1fr; gap:24px; }
  .sec-head .end { justify-self:start; }
  .pillars { grid-template-columns:1fr; gap:48px; }
  .grid.c3, .grid.c4, .gets { grid-template-columns:1fr 1fr; }
  .gets { row-gap:24px; }
  .facts { grid-template-columns:1fr 1fr; }
  .facts > div:nth-child(odd) { padding-left:0; border-left:0; }
  .facts > div:nth-child(n+3) { padding-top:28px; }
}
/* Phone */
@media (max-width: 720px) {
  :root { --gutter:16px; }
  .site-nav { display:none; position:absolute; top:68px; left:0; right:0; flex-direction:column; gap:0; background:var(--navy);
              border-bottom:1px solid var(--line-dark); padding:8px var(--gutter) 16px; }
  .site-nav.open { display:flex; }
  .site-nav a { padding:14px 0; border-bottom:1px solid var(--line-dark); }
  .menu-btn { display:block; }
  .site-header .wrap { gap:16px; }
  .sec { padding:72px 0; }
  .hero { padding:72px 0 140px; min-height:auto; }
  .grid.c2, .grid.c3, .grid.c4, .gets, .checklist { grid-template-columns:1fr; }
  table.swan-list tr { display:grid; grid-template-columns:1fr auto; column-gap:12px; padding:14px 0; border-top:1px solid var(--line-dark); }
  table.swan-list tr:last-child { border-bottom:1px solid var(--line-dark); }
  table.swan-list td, table.swan-list tr:last-child td { border:0; padding:0; font-size:15px; }
  table.swan-list td.d { grid-column:1 / -1; width:auto; font-size:12px; margin-bottom:4px; }
  table.swan-list td.r { font-size:17px; }
  .arch { grid-template-columns:1fr; }
  .link { padding:20px 0; }
  .link .wire { width:1px; height:40px; background:repeating-linear-gradient(180deg, var(--teal) 0 6px, transparent 6px 11px); background-size:1px 11px; animation:none; }
  .cell { padding:28px 22px 32px; }
  .cell .idx { margin-bottom:24px; }
}