:root {
  --paper: #f8f5ed;
  --ink: #202e2a;
  --muted: #5d6860;
  --orange: #ed6337;
  --teal: #167267;
  --line: #dcded3;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible, iframe:focus-visible { outline: 3px solid var(--teal); outline-offset: 5px; }
p, h1, h2, h3 { margin: 0; }
.wrap { width: min(1240px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 12px; z-index: 10; padding: 8px 16px; background: var(--ink); color: white; }
.skip-link:focus { top: 12px; }
.site-header { min-height: 108px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 21px; font-weight: 800; letter-spacing: -.6px; }
.brand-edition { display: block; color: var(--muted); font-size: 11px; letter-spacing: 2px; line-height: 1.4; font-weight: 500; }
.brand-mark { display: grid; grid-template-columns: repeat(2, 14px); gap: 3px; transform: rotate(-8deg); }
.brand-mark i { height: 11px; background: var(--teal); border-radius: 2px; }
.brand-mark i:first-child { grid-column: 1 / -1; background: var(--orange); }
.header-nav { display: flex; gap: 28px; align-items: center; font-size: 14px; font-weight: 600; }
.header-nav a:hover, .text-link:hover, .game-bottomline a:hover, .footer-top a:hover { color: var(--teal); }
.header-nav .nav-game { color: var(--teal); border-bottom: 1px solid var(--teal); }
.hero { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 52px; padding: 58px 0 66px; }
.hero-copy { min-width: 0; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 1.5px; color: var(--teal); margin-bottom: 20px; }
.eyebrow span { color: var(--orange); margin-right: 7px; }
h1 { font-size: clamp(60px, 6vw, 83px); font-weight: 900; letter-spacing: -5px; line-height: 1.15; }
.hero-subtitle { display: block; margin-top: 17px; font-size: clamp(25px, 2.6vw, 35px); letter-spacing: -.8px; line-height: 1.5; }
.hero-description { max-width: 350px; color: var(--muted); margin-top: 20px; font-size: 15px; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 23px; }
.feature-tags span { border: 1px solid var(--line); border-radius: 30px; padding: 3px 12px; font-size: 12px; font-weight: 600; }
.play-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; min-height: 50px; padding: 11px 23px; margin-top: 25px; border: 1px solid var(--ink); border-radius: 5px; background: var(--orange); color: #20241c; font-size: 15px; font-weight: 800; box-shadow: 3px 3px 0 var(--ink); transition: transform .15s, box-shadow .15s; }
.play-button:hover { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.hero-note { margin-top: 13px; color: var(--muted); font-size: 12px; }
.mini-art { height: 110px; margin-top: 29px; position: relative; max-width: 290px; }
.art-brick { position: absolute; top: 8px; width: 48px; height: 20px; border-radius: 3px; background: var(--teal); }
.brick-one { left: 20px; transform: rotate(-9deg); }
.brick-two { left: 77px; top: 1px; background: #e8b848; transform: rotate(3deg); }
.brick-three { left: 135px; top: 10px; background: var(--orange); transform: rotate(10deg); }
.art-paddle { position: absolute; top: 89px; left: 105px; width: 75px; height: 9px; border-radius: 5px; background: var(--teal); }
.art-ball { position: absolute; top: 55px; left: 124px; width: 13px; height: 13px; border-radius: 50%; background: var(--orange); }
.art-trail { position: absolute; left: 112px; top: 40px; width: 2px; height: 13px; background: #cfbca1; transform: rotate(-35deg); }
.art-label { position: absolute; left: 204px; top: 42px; font-size: 11px; color: var(--muted); writing-mode: vertical-rl; }
.game-card { min-width: 0; scroll-margin-top: 20px; background: #fffdf7; border: 1px solid var(--ink); border-radius: 12px; box-shadow: 7px 7px 0 #d8e1d6; overflow: hidden; }
.game-topline { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 13px 17px; font-size: 12px; font-weight: 700; }
.game-topline i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); margin-right: 7px; }
.game-type { font-size: 10px; color: var(--muted); border: 1px solid var(--line); padding: 1px 8px; border-radius: 20px; }
.game-frame { display: block; width: 100%; height: 548px; border: 0; background: #161512; }
.game-bottomline { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 7px 15px; padding: 12px 17px; font-size: 11px; color: var(--muted); }
.game-bottomline a { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; font-weight: 600; }
.game-fallback { padding: 15px; }
.section-space { padding-block: 64px; border-top: 1px solid var(--line); scroll-margin-top: 25px; }
.section-number { font-size: 11px; color: var(--teal); letter-spacing: 1.5px; font-weight: 700; margin-bottom: 13px; }
h2 { font-size: clamp(26px, 3vw, 36px); line-height: 1.4; letter-spacing: -1px; font-weight: 800; }
.section-heading > p:last-child { color: var(--muted); font-size: 14px; margin-top: 14px; max-width: 640px; }
.control-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 30px; }
.control-card { border-left: 1px solid var(--line); padding: 0 22px; }
.control-card:first-child { padding-left: 0; border-left: 0; }
.control-icon { display: inline-flex; height: 48px; align-items: center; justify-content: center; color: var(--teal); font-size: 23px; font-weight: 800; margin-bottom: 10px; }
.keyboard-icon { font-family: monospace; letter-spacing: 1px; white-space: nowrap; }
.mouse-icon svg { width: 36px; height: 42px; fill: none; stroke: currentColor; stroke-width: 2; }
.touch-icon { font-size: 36px; }
h3 { font-size: 17px; font-weight: 750; margin-bottom: 9px; }
.control-card p, .power-card p { color: var(--muted); font-size: 13px; }
.shortcut-note { margin-top: 30px; padding: 12px 16px; font-size: 12px; color: var(--muted); background: #eeeee3; border-radius: 5px; }
.shortcut-note span { color: var(--ink); font-weight: 700; margin-right: 12px; }
.tips { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 72px; }
.angle-figure { padding: 22px 24px; background: #e8eee3; border-radius: 9px; border: 1px solid #d5ddcf; text-align: center; }
.angle-figure svg { display: block; width: 100%; height: auto; font-family: inherit; }
.figure-label { font-size: 12px; color: #31504a; }
.tips-copy > p:not(.section-number) { color: var(--muted); font-size: 14px; margin-top: 17px; }
.combo-note { border-left: 3px solid var(--orange); padding-left: 18px; margin-top: 25px; font-size: 13px; }
.combo-note strong { font-size: 14px; }
.combo-note p { margin-top: 6px; color: var(--muted); }
.power-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 29px; }
.power-card { background: #fffdf7; padding: 24px 21px; border: 1px solid var(--line); border-radius: 8px; }
.power-symbol { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; margin-bottom: 20px; font-weight: 800; font-size: 22px; }
.power-life { background: #e4edcc; color: #456016; font-size: 17px; }
.power-wide { background: #dcefeb; color: var(--teal); }
.power-slow { background: #f7edc9; color: #71580c; }
.power-multi { background: #f7e1d7; color: #a73c1f; font-size: 11px; letter-spacing: 1px; }
.faq { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; }
.text-link { display: inline-block; font-size: 13px; font-weight: 700; border-bottom: 1px solid var(--ink); margin-top: 25px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 19px 28px 19px 0; font-size: 14px; font-weight: 650; position: relative; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 2px; top: 15px; color: var(--teal); font-size: 22px; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { padding: 0 22px 19px 0; font-size: 13px; color: var(--muted); }
.closing { display: flex; justify-content: space-between; align-items: center; gap: 24px; border: 1px solid var(--line); border-radius: 8px; background: #ebeede; padding: 32px 38px; margin: 0 0 64px; }
.closing p { font-size: 24px; font-weight: 800; letter-spacing: -.5px; }
.closing span { font-size: 13px; color: var(--muted); }
.closing .play-button { margin: 0; flex-shrink: 0; }
.closing .play-button span { color: var(--ink); font-size: 18px; }
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; }
.footer-top { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; font-size: 12px; color: var(--muted); }
.footer-brand { color: var(--ink); font-size: 17px; font-weight: 800; }
.footer-top > a:last-child { margin-left: auto; }
.language-nav { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-top: 20px; font-size: 12px; color: var(--muted); }
.language-nav a { padding: 4px 0; }
.language-nav a:hover, .language-nav a[aria-current="page"] { color: var(--teal); text-decoration: underline; text-underline-offset: 5px; }
@media (max-width: 1100px) {
  .wrap { width: calc(100% - 48px); }
  .hero { gap: 30px; grid-template-columns: .75fr 1.25fr; }
  .tips, .faq { gap: 40px; }
  .power-card { padding: 20px 16px; }
}
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding-block: 32px 44px; }
  .hero-description { max-width: 560px; }
  .hero-subtitle br { display: none; }
  .mini-art { display: none; }
  .hero-note { margin-bottom: 0; }
  .hero .play-button { margin-top: 18px; }
  .game-frame { height: 540px; }
  .section-space { padding-block: 44px; }
  .tips, .faq { grid-template-columns: 1fr; gap: 30px; }
  .tips-copy { grid-row: 1; }
  .tips-copy h2 br, .faq h2 br { display: none; }
  .power-grid { grid-template-columns: repeat(2, 1fr); }
  .closing { padding: 24px; margin-bottom: 44px; }
  .closing p { font-size: 21px; }
}
@media (max-width: 540px) {
  .wrap { width: calc(100% - 32px); }
  .site-header { min-height: 80px; gap: 10px; }
  .brand { font-size: 17px; gap: 8px; }
  .brand-mark { grid-template-columns: repeat(2, 11px); }
  .brand-mark i { height: 9px; }
  .header-nav { gap: 0; font-size: 12px; }
  .header-nav > a:not(.nav-game) { display: none; }
  .eyebrow { font-size: 11px; margin-bottom: 12px; }
  h1 { font-size: 58px; letter-spacing: -3px; }
  .hero-subtitle { font-size: 23px; margin-top: 12px; }
  .hero-description { font-size: 14px; margin-top: 14px; }
  .feature-tags { margin-top: 16px; }
  .game-card { box-shadow: 4px 4px 0 #d8e1d6; }
  .game-frame { height: 490px; }
  .game-topline { padding: 11px 12px; }
  .game-bottomline { padding: 10px 12px; }
  .control-grid { grid-template-columns: 1fr; gap: 20px; }
  .control-card, .control-card:first-child { display: grid; grid-template-columns: 44px 1fr; column-gap: 14px; padding: 0; border: 0; }
  .control-card .control-icon { grid-row: 1 / 3; margin: 0; }
  .control-card h3 { margin-bottom: 5px; }
  .shortcut-note { margin-top: 22px; }
  .shortcut-note span { display: block; margin-bottom: 4px; }
  .angle-figure { padding: 14px 10px; }
  .power-grid { gap: 10px; }
  .power-card { padding: 18px 13px; }
  .power-card h3 { font-size: 15px; }
  .power-symbol { margin-bottom: 14px; }
  .closing { flex-direction: column; align-items: flex-start; gap: 18px; padding: 23px 20px; }
  .footer-top p { flex-basis: 100%; order: 1; }
  .language-nav { gap: 7px 17px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}