/* Mobile is the base layout. Wider screens add space, never required content. */
:root {
  color-scheme: dark;
  --night: #0b1118;
  --paper: #eeede9;
  --white: #f0f2f5;
  --muted: #a2acba;
  --blue: #a6c8f5;
  --ink: #1b2633;
  --line: rgba(181, 201, 228, .26);
  --sans: "Noto Sans TC", -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", sans-serif;
  --display: "Space Grotesk", var(--sans);
  --gutter: clamp(22px, 5.6vw, 80px);
}
*, *::before, *::after { box-sizing: border-box; }
body { background: var(--night); color: var(--white); font-family: var(--sans); font-size: 18px; -webkit-font-smoothing: antialiased; }
body, h1, h2, h3, p, figure { margin: 0; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, summary { touch-action: manipulation; }
button:not(:disabled), summary { cursor: pointer; }
button[hidden] { display: none; }
svg { display: block; max-width: 100%; }
::selection { background: #a6c8f5; color: #0b1118; }
:focus-visible { outline: 2px solid #6299df; outline-offset: 6px; }
.wrap { width: min(100% - var(--gutter) * 2, 1240px); margin-inline: auto; }
.eyebrow { font-family: var(--display); font-size: 12px; font-weight: 500; line-height: 1.7; letter-spacing: .1em; }
.reading-progress { position: fixed; z-index: 15; top: 0; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; pointer-events: none; }
.site-header { position: relative; z-index: 10; background: var(--night); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; min-height: 44px; gap: 11px; flex-shrink: 0; }
.brand-goal { font-family: var(--display); font-size: 27px; line-height: 1; font-weight: 700; letter-spacing: -.075em; }
.brand-period { color: var(--blue); }
.brand-divider { height: 25px; width: 1px; background: #43505f; margin-left: 2px; }
.brand-partner { color: #c7cfd9; font-size: 12px; line-height: 1.7; font-weight: 500; letter-spacing: .04em; }
.brand-partner span { display: block; }
.header-edition { font: 500 14px/1.6 var(--sans); letter-spacing: .02em; color: #c0d6f5; white-space: nowrap; }
.hero { position: relative; overflow: clip; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 90% 50%, rgba(35, 68, 110, .13), transparent 62%); pointer-events: none; }
.hero-grid { position: relative; padding-top: 43px; }
.hero-eyebrow { display: flex; align-items: center; gap: 12px; color: var(--blue); font-size: 12px; letter-spacing: .1em; }
.small-line { width: 22px; height: 1px; background: #9abce9; }
.hero-pretitle { margin-top: 30px; font-size: 16px; letter-spacing: .07em; color: #d0d6df; }
h1 { margin-top: 18px; font-size: clamp(36px, 10.2vw, 64px); line-height: 1.4; font-weight: 600; letter-spacing: -.045em; }
h1 > span { color: var(--blue); }
.security-keyword {
  --keyword-base: #f0cd92;
  --keyword-edge: #dfb16c;
  --keyword-highlight: #fff4d5;
  --keyword-beam: #fff4d5;
  --keyword-trail: #e8c18b70;
  --keyword-shadow: #e3ac4d38;
  --keyword-depth: #b57d2924;
  --keyword-halo: #efc77c80;
  position: relative;
  display: inline-block;
  color: var(--keyword-base);
  font-weight: 800;
  text-shadow: 0 0 22px var(--keyword-shadow), 0 2px 12px var(--keyword-depth);
}
.section-light .security-keyword {
  --keyword-base: #87551e;
  --keyword-edge: #633a15;
  --keyword-highlight: #945c20;
  --keyword-beam: #d2a35d;
  --keyword-trail: #a16b2f90;
  --keyword-shadow: #aa782829;
  --keyword-depth: #8353181a;
  --keyword-halo: #a36b2760;
}
@supports ((background-clip: text) or (-webkit-background-clip: text)) {
  .security-keyword {
    background: linear-gradient(110deg, var(--keyword-edge) 10%, var(--keyword-base) 32%, var(--keyword-highlight) 45%, var(--keyword-base) 58%, var(--keyword-edge) 80%);
    background-size: 260% 100%;
    background-position: 100% 50%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: keyword-flow 6s ease-in-out infinite alternate;
  }
}
.security-keyword::after {
  content: "";
  position: absolute;
  inset: auto -.02em .015em;
  height: 3px;
  background: linear-gradient(90deg, transparent 15%, var(--keyword-trail) 36%, var(--keyword-beam) 50%, var(--keyword-trail) 64%, transparent 85%);
  background-size: 240% 100%;
  background-position: 100% 50%;
  box-shadow: 0 3px 12px var(--keyword-shadow);
  filter: drop-shadow(0 0 4px var(--keyword-halo));
  animation: keyword-flow 4s ease-in-out infinite alternate;
}
.hero-description strong, .closing-description strong { color: #d5e5fc; font-weight: 600; }
.hero-description { margin-top: 26px; color: #bdc7d5; font-size: 18px; line-height: 1.95; letter-spacing: .01em; }
.desktop-break { display: none; }
.security-visual { position: relative; margin: 32px auto 0; width: min(100%, 550px); }
.visual-year { position: absolute; top: -4%; left: 7%; width: 86%; text-align: center; font: 500 clamp(90px, 29vw, 180px)/1 var(--display); letter-spacing: -.065em; color: transparent; -webkit-text-stroke: 1px rgba(140, 167, 202, .24); }
.shield-scene { position: relative; width: 100%; height: auto; }
.shield-scene :is(path, circle, ellipse, rect), .map-connections path { vector-effect: non-scaling-stroke; stroke-linecap: round; stroke-linejoin: round; }
.orbit-ring { transform-origin: 300px 275px; animation: orbit 55s linear infinite; }
.shield-body { animation: shield-float 9s ease-in-out infinite; }
.shield-scan { animation: shield-scan 8s ease-in-out infinite; }
.signal-trace { stroke-dasharray: 34 101; animation: signal 6s linear infinite; }
.signal-trace, .shield-scan, .map-pulse, .orbit-ring > path { filter: drop-shadow(0 0 4px #8bbafa80); }
.trace-two { animation-delay: -2s; }.trace-three { animation-delay: -4s; }
.core-glow { animation: breathe 4s ease-in-out infinite; }
figcaption { display: flex; align-items: center; gap: 8px; font-size: 13px; line-height: 1.8; color: #afbdd0; letter-spacing: .02em; }
.caption-cross { font: 16px/1 var(--display); color: #9abce9; }
.visual-index { margin-left: auto; font-family: var(--display); font-size: 12px; letter-spacing: .06em; }
.hero-baseline { position: relative; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; gap: 12px; margin-top: 35px; padding-block: 25px; border-top: 1px solid var(--line); }
.hero-baseline .eyebrow { font-size: 11px; letter-spacing: .06em; color: #c0cbd9; }
.muted-word { color: #a7b7cd; }
.baseline-note { font-size: 14px; color: #b9c6d7; }
.section-light { color-scheme: light; background: var(--paper); color: var(--ink); }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 19px; border-bottom: 1px solid var(--line); }
.section-heading .eyebrow { font-size: 12px; color: var(--blue); }
.section-note { font-size: 14px; letter-spacing: .04em; color: #b9c5d5; }
.section-light .section-heading { border-color: rgba(27, 38, 51, .2); }
.section-light .section-heading .eyebrow { color: #345b88; }
.section-light .section-note { color: #596573; }
h2 { font-size: clamp(32px, 7.6vw, 48px); line-height: 1.5; font-weight: 500; letter-spacing: -.045em; text-wrap: balance; }
.perspective { padding-block: 63px 58px; }
.perspective-grid { padding-top: 33px; }
.security-equation { line-height: 1.8; }
.equation-sign { display: inline-block; margin-inline: .18em; color: #5a6e86; font-family: var(--display); font-weight: 400; }
.perspective-copy { margin-top: 27px; }
.perspective-copy p { max-width: 560px; font-size: 18px; line-height: 2; letter-spacing: .015em; color: #424e5d; }
.perspective-copy p + p { margin-top: 25px; }
.perspective-copy .perspective-emphasis { margin-top: 30px; color: #233f60; font-size: 20px; line-height: 1.9; font-weight: 500; }
.chapter-line { display: flex; align-items: center; gap: 16px; margin-top: 43px; padding-top: 22px; border-top: 1px solid rgba(27, 38, 51, .18); }
.chapter-line > div { display: flex; flex-direction: column; gap: 8px; flex-shrink: 1; min-width: 0; }
.chapter-line > div:last-child { text-align: right; }
.chapter-year { font: 400 34px/1.1 var(--display); letter-spacing: -.04em; }
.chapter-line > div:last-child .chapter-year { color: #35618c; }
.chapter-line > div > span:last-child { font-size: 14px; line-height: 1.8; color: #4b5766; }
.chapter-rule { position: relative; flex: 1; min-width: 10px; height: 1px; background: #abb3ba; }
.chapter-rule span { position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid #7089a5; border-right: 1px solid #7089a5; transform: rotate(45deg); }
.protection { padding-block: 63px 58px; background: #0e1620; }
.protection-intro { margin-top: 33px; }
.protection-intro > p { margin-top: 25px; font-size: 18px; color: #bdc7d5; line-height: 2; }
.scope-layout { margin-top: 24px; }
.scope-figure { max-width: 480px; margin: 0 auto; }
.scope-map { position: relative; width: 100%; aspect-ratio: 440 / 360; overflow: hidden; }
.map-grid { position: absolute; inset: 4%; background-image: radial-gradient(#a6c8f536 1px, transparent 1px); background-size: 22px 22px; mask-image: radial-gradient(ellipse, black, transparent 68%); }
.map-orbit { position: absolute; top: 50%; left: 50%; border: 1px solid #8bbafa60; border-radius: 50%; transform: translate(-50%, -50%); }
.orbit-one { width: 32%; aspect-ratio: 1; }.orbit-two { width: 58%; aspect-ratio: 1; }.orbit-three { width: 81%; aspect-ratio: 1; border-style: dashed; border-color: #8bbafa50; }
.map-connections { position: absolute; inset: 0; width: 100%; height: 100%; }
.map-pulse { animation: map-signal 10s linear infinite; }
.map-center { position: absolute; top: 50%; left: 50%; width: 23%; aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1.5px solid #a6c8f5b3; background: #142131; transform: translate(-50%, -50%); border-radius: 50%; box-shadow: 0 0 45px #81b5ff0c; }
.map-center-mark { font: 500 clamp(28px, 9vw, 44px)/1 var(--display); letter-spacing: -.1em; padding-right: 4px; }
.map-center-mark > span { color: var(--blue); }
.map-center > span:last-child { font: 400 10px/1 var(--display); letter-spacing: .1em; margin-top: 9px; color: #a6c8f5; }
.map-node { position: absolute; display: flex; align-items: center; gap: 8px; background: #0e1620; padding: 8px; font-size: 16px; line-height: 1.5; }
.map-node small { display: block; font: 11px/1.5 var(--display); color: #b0c3de; letter-spacing: .04em; margin-top: 3px; }
.node-device { top: 11%; left: 50%; transform: translateX(-50%); }
.node-account { left: 10%; top: 67%; }.node-transaction { right: 7%; top: 67%; }
.node-dot { width: 5px; height: 5px; border-radius: 50%; background: #a6c8f5; box-shadow: 0 0 0 4px #a6c8f50f; }
.scope-figure figcaption { padding-block: 8px 20px; border-bottom: 1px solid var(--line); }
.scope-list { margin-top: 15px; }
.scope-item { display: grid; grid-template-columns: 27px 1fr; gap: 12px; padding-block: 25px; border-bottom: 1px solid var(--line); }
.scope-item:last-child { border-bottom: none; padding-bottom: 0; }
.scope-number { font: 400 15px/1.5 var(--display); color: #9cbeeb; margin-top: 3px; }
.scope-category { font: 400 12px/1.5 var(--display); color: #b0c3de; letter-spacing: .06em; }
.scope-item h3 { margin-top: 9px; font-size: 25px; font-weight: 500; letter-spacing: .015em; }
.scope-item h3 + p { margin-top: 14px; font-size: 18px; color: #bdc7d5; line-height: 1.95; }
.commitment { padding-block: 63px 30px; }
.commitment-layout { margin-top: 33px; }
.commitment-intro > p { margin-top: 25px; max-width: 440px; font-size: 18px; color: #424e5d; line-height: 2; }
.commitment-hint { display: inline-flex; align-items: center; gap: 20px; margin-top: 24px; font-size: 15px; color: #4d6077; }
.commitment-hint > span { font: 21px/1 var(--display); color: #35618c; }
.action-list { margin-top: 28px; border-top: 1px solid #283f5a; }
.action { border-bottom: 1px solid #bec3c8; }
.action summary { position: relative; display: flex; align-items: center; gap: 20px; min-height: 88px; padding-block: 22px; list-style: none; }
.action summary::-webkit-details-marker { display: none; }.action summary::marker { content: ""; }
.action-number { font: 400 15px/1 var(--display); color: #4d5c70; }
.action h3 { font-size: 23px; font-weight: 500; letter-spacing: .02em; transition: color .2s; }
.action summary:hover h3, .action[open] h3 { color: #35618c; }
.action-toggle { position: relative; width: 28px; height: 28px; margin-left: auto; flex-shrink: 0; }
.action-toggle::before, .action-toggle::after { content: ""; position: absolute; left: 7px; top: 13px; width: 14px; height: 1px; background: #536980; transition: transform .25s; }
.action-toggle::after { transform: rotate(90deg); }.action[open] .action-toggle::after { transform: rotate(0); }
.action-content { padding: 0 10px 26px 33px; }
.action-content p { font-size: 18px; line-height: 2; color: #424e5d; }
.action-keywords { display: block; margin-top: 20px; font-size: 14px; line-height: 1.9; letter-spacing: .01em; color: #3e5d80; }
.action[open] .action-content { animation: content-in .3s ease both; }
.initiative-note { margin-top: 36px; padding-top: 20px; border-top: 1px solid #cbd0d4; font-size: 15px; color: #4d5b6c; line-height: 1.9; }
.closing { position: relative; overflow: hidden; padding-block: 85px 100px; text-align: center; }
.closing-content { position: relative; z-index: 1; }
.closing .eyebrow { color: #b6cbed; font-size: 12px; letter-spacing: .08em; }
.closing h2 { margin-top: 26px; font-size: clamp(30px, 8.7vw, 64px); font-weight: 500; line-height: 1.55; }
.closing-description { margin-top: 26px; font-size: 18px; line-height: 2; color: #bdc7d5; }
.closing-signature { display: block; margin-top: 36px; font-size: 16px; font-weight: 500; letter-spacing: .04em; color: #d1dceb; }
.closing-signature span { color: #7f94b0; padding-inline: 7px; }
.closing-horizon { position: absolute; left: 50%; bottom: -167px; width: max(880px, 140%); height: 210px; border: 1.5px solid #a6c8f599; border-radius: 50%; transform: translateX(-50%); background: radial-gradient(ellipse at 50% 0, #2039554d, transparent 60%); box-shadow: 0 -12px 90px #638dc326; }
.site-footer { position: relative; border-top: 1px solid var(--line); background: #0b1118; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; column-gap: 17px; row-gap: 25px; padding-block: 28px; }
.footer-brand { display: inline-flex; align-items: center; min-height: 44px; font: 700 24px/1 var(--display); letter-spacing: -.07em; }.footer-brand > span { color: var(--blue); }
.footer-inner > p { font-size: 16px; color: #b9c6d7; line-height: 1.8; letter-spacing: .01em; }
.footer-since { display: block; font: 400 13px/1.8 var(--display); margin-top: 6px; color: #a9bad2; }
.footer-utilities { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; flex-basis: 100%; padding-top: 20px; border-top: 1px solid var(--line); }
.prototype-label { flex-basis: 100%; font-size: 14px; color: #a9bad2; line-height: 1.8; }
.motion-toggle { min-height: 48px; display: inline-flex; align-items: center; gap: 8px; padding: 0; border: 0; background: transparent; color: #b9c6d7; font-size: 15px; }
.motion-indicator { width: 4px; height: 4px; border-radius: 50%; background: #a6c8f5; }.motion-toggle[aria-pressed="false"] .motion-indicator { background: #687587; }
.motion-state { color: #c5d2e4; }
.reveal.is-pending { opacity: 0; transform: translateY(18px); }
.reveal { transition: opacity .7s ease, transform .7s cubic-bezier(.2, .65, .3, 1); }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes shield-float { 50% { transform: translateY(-5px); } }
@keyframes shield-scan { 0%, 100% { opacity: 0; transform: translateY(-35px); } 30% { opacity: .85; } 70% { opacity: .85; } 90% { opacity: 0; transform: translateY(110px); } }
@keyframes signal { to { stroke-dashoffset: -270; } }
@keyframes map-signal { to { stroke-dashoffset: -540; } }
@keyframes breathe { 50% { opacity: .35; } }
@keyframes content-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }
@keyframes keyword-flow { from { background-position: 100% 50%; } to { background-position: 0% 50%; } }
@media (min-width: 600px) {
  .hero-grid { padding-top: 60px; }
  .hero-pretitle { margin-top: 36px; }
  .hero-baseline { flex-direction: row; align-items: center; margin-top: 45px; padding-block: 28px; }
  .perspective, .protection { padding-block: 80px; }
  .chapter-line { gap: 32px; margin-top: 55px; padding-top: 25px; }
  .commitment { padding-block: 80px 35px; }
  .closing { padding-block: 100px 125px; }
}
@media (min-width: 900px) {
  .brand { gap: 16px; }
  .brand-goal { font-size: 32px; }
  .brand-divider { height: 32px; }
  .brand-partner { font-size: 13px; }
  .header-edition { font-size: 16px; }
  .hero-grid { display: grid; grid-template-columns: 1.08fr 1fr; align-items: center; column-gap: 5px; padding-block: 60px 45px; min-height: 620px; }
  h1 { font-size: clamp(44px, 4.45vw, 68px); line-height: 1.4; letter-spacing: -.045em; }
  .hero-pretitle { font-size: 18px; margin-top: 38px; }
  .desktop-break { display: inline; }
  .security-visual { width: 110%; max-width: 640px; margin: 22px 0 0 -3%; }
  .security-visual figcaption { margin-inline: 7%; }
  .visual-year { font-size: clamp(140px, 15.5vw, 225px); }
  .hero-baseline { margin-top: 0; }
  .perspective, .protection { padding-block: 95px; }
  .section-heading { padding-bottom: 22px; }
  h2 { font-size: clamp(36px, 3.3vw, 48px); }
  .perspective-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8%; padding-top: 52px; }
  .perspective-copy { margin-top: 0; padding-top: 5px; }
  .perspective-copy .perspective-emphasis { margin-top: 30px; }
  .chapter-line { margin-top: 62px; }
  .chapter-line > div { flex-direction: row; align-items: baseline; gap: 20px; }
  .chapter-year { font-size: 40px; }
  .protection-intro { margin-top: 50px; display: grid; grid-template-columns: 1fr 1fr; gap: 8%; align-items: end; }
  .protection-intro > p { margin-top: 0; padding-bottom: 6px; }
  .scope-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 8%; align-items: center; margin-top: 35px; }
  .scope-figure { width: 100%; margin-left: 0; }
  .scope-map { aspect-ratio: 440 / 390; }
  .scope-figure figcaption { padding-bottom: 14px; }
  .scope-list { margin-top: 0; }
  .scope-item { padding-block: 30px; grid-template-columns: 32px 1fr; gap: 15px; }
  .scope-item:last-child { padding-bottom: 18px; }
  .commitment { padding-block: 95px 30px; }
  .commitment-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 8%; align-items: start; margin-top: 50px; }
  .commitment-intro { position: sticky; top: 50px; }
  .commitment-hint { margin-top: 35px; }
  .action-list { margin-top: 0; }
  .action summary { min-height: 92px; gap: 25px; }
  .action-content { padding-left: 44px; padding-bottom: 30px; }
  .initiative-note { margin-top: 60px; }
  .closing { padding-block: 115px 135px; }
  .closing h2 { font-size: clamp(46px, 4.4vw, 64px); margin-top: 30px; }
  .closing-signature { margin-top: 40px; }
  .closing-horizon { bottom: -165px; height: 240px; }
  .footer-inner { flex-wrap: nowrap; gap: 24px; padding-block: 30px; }
  .footer-utilities { margin-left: auto; flex-basis: auto; justify-content: flex-end; padding-top: 0; border: 0; gap: 12px 24px; }
  .prototype-label { flex-basis: auto; }
}
@media (min-width: 1200px) {
  .hero-grid { min-height: 680px; padding-block: 65px 50px; }
  .hero-pretitle { margin-top: 45px; }
  .hero-baseline { padding-block: 30px; }
  .perspective, .protection { padding-block: 105px; }
  .commitment { padding-top: 105px; }
}
@media (max-width: 359px) {
  .brand { gap: 8px; }
  .header-edition { font-size: 13px; }
  .hero-eyebrow { gap: 9px; font-size: 11px; }
  .chapter-line { gap: 12px; }
}
/* System reduced-motion preferences always take precedence. */
html[data-page-visibility="hidden"] *, html[data-page-visibility="hidden"] *::before, html[data-page-visibility="hidden"] *::after { animation-play-state: paused !important; }
html[data-motion="off"] { scroll-behavior: auto; }
html[data-motion="off"] *, html[data-motion="off"] *::before, html[data-motion="off"] *::after { animation: none !important; transition: none !important; }
html[data-motion="off"] .reveal.is-pending { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }*, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal.is-pending { opacity: 1; transform: none; }
}
@media print {
  html { color-scheme: light; }body, .protection, .closing { background: #fff; color: #172433; }
  .site-header, .reading-progress, .motion-toggle, .closing-horizon { display: none; }
  .reveal.is-pending { opacity: 1; transform: none; }section { break-inside: avoid; }
  .action-content { display: block !important; }details::details-content { content-visibility: visible; }
}