:root {
  --sky-50: #effbff;
  --sky-100: #d9f4fb;
  --sky-200: #bcebf5;
  --sea: #1687a5;
  --sea-deep: #075b73;
  --aqua: #22aeb5;
  --gold: #e7ac42;
  --gold-soft: #ffe1a1;
  --coral: #ef6682;
  --coral-dark: #d94768;
  --ink: #163742;
  --muted: #5b747c;
  --line: rgba(10, 104, 130, .16);
  --white: #fff;
  --shadow: 0 18px 48px rgba(17, 99, 122, .14);
  --max: 1180px;
  --header-height: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--sky-50);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
h1, h2, h3, p, figure, dl, dd, ul { margin-top: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: 0; }
p { color: var(--muted); }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 10px 16px;
  color: var(--white);
  background: var(--sea-deep);
  transform: translateY(-150%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.2);
  transition: background .25s ease, box-shadow .25s ease, color .25s ease;
}
.site-header.scrolled {
  color: var(--ink);
  background: rgba(255,255,255,.96);
  box-shadow: 0 8px 28px rgba(8, 86, 108, .12);
  backdrop-filter: blur(14px);
}
.nav-shell {
  width: min(calc(100% - 40px), 1320px);
  height: 100%;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 220px; }
.brand-logo { width: 88px; height: 44px; object-fit: contain; }
.brand-copy { display: grid; line-height: 1.1; }
.brand-copy strong { font-size: 13px; letter-spacing: .08em; }
.brand-copy small { margin-top: 5px; font-size: 11px; opacity: .76; }
.site-nav { display: flex; align-items: center; gap: clamp(12px, 1.35vw, 22px); font-size: 14px; font-weight: 650; }
.site-nav > a { display: inline-flex; align-items: center; gap: 6px; }
.site-nav > a:not(.nav-cta) { position: relative; padding: 8px 0; white-space: nowrap; }
.site-nav > a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  background: var(--gold);
  transform: translateX(-110%);
  transition: transform .3s ease;
}
.site-nav > a:not(.nav-cta) { overflow: hidden; }
.site-nav > a:hover::after, .site-nav > a:focus-visible::after { transform: translateX(0); }
.nav-cta { padding: 9px 15px; color: var(--white); background: var(--coral); border-radius: 999px; box-shadow: 0 8px 20px rgba(217, 71, 104, .24); transition: transform .3s ease, background .3s ease, box-shadow .3s ease, filter .3s ease; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.nav-icon, .action-icon { flex: 0 0 auto; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.nav-icon { width: 16px; height: 16px; opacity: .82; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 10px; background: none; border: 0; border-radius: 999px; cursor: pointer; transition: transform .3s ease, background .3s ease, filter .3s ease; }
.menu-toggle span { display: block; width: 22px; height: 2px; margin: 5px auto; background: currentColor; transition: transform .2s ease, opacity .2s ease; }

.hero {
  position: relative;
  min-height: min(880px, 94svh);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--white);
  background: var(--sea-deep);
}
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-media { object-position: center 38%; transform: none; }
.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(3,53,70,.88) 0%, rgba(4,65,83,.65) 43%, rgba(9,92,113,.15) 75%), linear-gradient(0deg, rgba(3,44,58,.38), transparent 52%);
}
.hero-content { position: relative; z-index: 2; width: min(calc(100% - 40px), var(--max)); margin: calc(var(--header-height) + 30px) auto 0; }
.eyebrow, .section-kicker { margin-bottom: 15px; color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.hero h1 { max-width: 860px; margin-bottom: 12px; font-size: clamp(36px, 5vw, 68px); font-weight: 850; text-wrap: balance; text-shadow: 0 4px 22px rgba(2,40,52,.26); }
.hero h1 span { display: block; font-size: .37em; letter-spacing: .12em; }
.hero-cn { margin-bottom: 18px; color: var(--white); font-size: clamp(19px, 2vw, 27px); font-weight: 650; }
.hero-lead { max-width: 690px; margin-bottom: 30px; color: rgba(255,255,255,.88); font-size: clamp(16px, 1.5vw, 19px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 42px; }
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 750;
  transition: transform .3s ease, background .3s ease, box-shadow .3s ease, filter .3s ease;
}
.button:hover, .button:focus-visible { transform: translateY(-2px) scale(1.035); filter: brightness(1.08); }
.button-primary { color: var(--white); background: var(--coral); box-shadow: 0 12px 26px rgba(214, 59, 94, .3); }
.button-primary:hover, .button-primary:focus-visible { background: var(--coral-dark); }
.button-ghost { color: var(--white); border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.08); backdrop-filter: blur(4px); }
.button-ghost:hover, .button-ghost:focus-visible { background: rgba(255,255,255,.16); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 0; margin: 0; }
.hero-facts div { min-width: 155px; padding: 0 25px; border-left: 1px solid rgba(255,255,255,.3); }
.hero-facts div:first-child { padding-left: 0; border-left: 0; }
.hero-facts dt { color: rgba(255,255,255,.63); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.hero-facts dd { margin: 2px 0 0; font-size: 14px; font-weight: 700; }
.scroll-cue { position: absolute; z-index: 2; right: 30px; bottom: 32px; display: grid; justify-items: center; gap: 7px; color: rgba(255,255,255,.68); font-size: 9px; letter-spacing: .15em; }
.scroll-cue span { width: 1px; height: 38px; background: linear-gradient(var(--gold), transparent); }

.section { padding: 104px 0; }
.section-inner { width: min(calc(100% - 40px), var(--max)); margin: auto; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 50px; margin-bottom: 44px; }
.section-heading h2, .intro-copy h2, .attributes-copy h2, .feature-copy h2, .faq-intro h2 { margin-bottom: 0; font-size: clamp(22px, 2.5vw, 34px); color: var(--sea-deep); }
.section-heading > p { width: min(100%, 430px); margin-bottom: 4px; }
.section-summary { color: var(--ink); font-size: 19px; line-height: 1.8; }

.intro { background: var(--white); }
.intro-grid { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); gap: clamp(45px, 7vw, 90px); align-items: center; }
.poster-frame { position: relative; margin: 0; }
.poster-frame::before { content: ""; position: absolute; inset: -12px 18px 12px -12px; border: 2px solid var(--gold); z-index: 0; }
.poster-frame img { position: relative; z-index: 1; width: 100%; height: auto; border-radius: 12px; box-shadow: var(--shadow); }
.poster-frame figcaption { position: relative; z-index: 2; width: 88%; margin: -38px auto 0; padding: 15px 18px; color: var(--ink); background: var(--white); border-left: 4px solid var(--coral); border-radius: 16px; box-shadow: 0 10px 28px rgba(18,89,108,.16); font-size: 13px; }
.intro-copy > p:not(.section-kicker) { margin-bottom: 18px; }
.intro-copy h2 { margin-bottom: 24px; }
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 34px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); border-radius: 16px; }
.spec-strip div { padding: 18px 12px; border-left: 1px solid var(--line); }
.spec-strip div:first-child { border-left: 0; padding-left: 0; }
.spec-strip strong, .spec-strip span { display: block; }
.spec-strip strong { color: var(--sea-deep); font-size: 15px; }
.spec-strip span { color: var(--muted); font-size: 11px; }

.gameplay { background: linear-gradient(180deg, var(--sky-100), var(--sky-50)); }
.wide-media { position: relative; margin: 0 0 52px; overflow: hidden; border-radius: 12px; box-shadow: var(--shadow); }
.wide-media img { width: 100%; height: auto; }
.wide-media figcaption { position: absolute; z-index: 2; right: 0; bottom: 0; max-width: 520px; padding: 18px 24px; color: var(--white); background: rgba(5, 78, 99, .91); }
.wide-media figcaption strong, .wide-media figcaption span { display: block; }
.wide-media figcaption strong { color: var(--gold-soft); font-size: 15px; }
.wide-media figcaption span { margin-top: 4px; font-size: 13px; }
.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.info-block { min-height: 235px; padding: 30px; background: rgba(255,255,255,.88); border-radius: 16px; transition: transform .3s ease, box-shadow .3s ease, background .3s ease; }
.block-number { color: var(--gold); font-size: 12px; font-weight: 850; letter-spacing: .14em; }
.info-block h3 { margin: 18px 0 12px; color: var(--sea-deep); font-size: 20px; }
.info-block p { margin: 0; font-size: 14px; }

.attributes { background: var(--white); }
.attributes-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(50px, 8vw, 100px); align-items: center; }
.attributes-copy h2 { margin-bottom: 30px; }
.attribute-list { margin-bottom: 28px; }
.attribute { display: grid; grid-template-columns: 70px 1fr; align-items: center; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.attribute b { width: 62px; height: 36px; display: grid; place-items: center; color: var(--white); border-radius: 4px; font-size: 13px; }
.attribute.pow b { background: #e06068; }
.attribute.tec b { background: #35a86d; }
.attribute.stm b { background: #d89b24; }
.attribute span { color: var(--muted); font-size: 14px; }
.attribute strong { display: block; color: var(--ink); font-size: 16px; }
.landscape-frame { position: relative; margin: 0; overflow: hidden; border-radius: 12px; }
.landscape-frame img { width: 100%; height: auto; box-shadow: var(--shadow); }

.guide { background: var(--sky-50); }
.guide-layout { display: grid; grid-template-columns: 1fr .78fr; gap: 60px; align-items: start; }
.guide-steps { border-top: 1px solid var(--line); }
.guide-step { display: grid; grid-template-columns: 52px 1fr; gap: 20px; padding: 25px 0; border-bottom: 1px solid var(--line); border-radius: 16px; transition: transform .3s ease, background .3s ease, box-shadow .3s ease; }
.guide-step > span { color: var(--coral); font-size: 13px; font-weight: 850; }
.guide-step h3 { margin-bottom: 8px; color: var(--sea-deep); font-size: 19px; }
.guide-step p { margin: 0; font-size: 14px; }
.guide-photo { position: sticky; top: calc(var(--header-height) + 24px); margin: 0; overflow: hidden; border-radius: 12px; }
.guide-photo img { width: 100%; height: auto; box-shadow: var(--shadow); }
.guide-photo figcaption { padding: 14px 0 0 18px; border-left: 3px solid var(--gold); color: var(--muted); font-size: 13px; }

.features { color: var(--white); background: var(--sea-deep); }
.feature-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(50px, 7vw, 90px); align-items: center; }
.feature-photo { position: relative; margin: 0; overflow: hidden; border-radius: 12px; }
.feature-photo img { width: 100%; height: auto; box-shadow: 0 24px 50px rgba(0,0,0,.24); }
.feature-copy h2 { margin-bottom: 30px; color: var(--white); }
.feature-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.2); }
.feature-list li { display: grid; grid-template-columns: 50px 1fr; gap: 18px; padding: 23px 0; border-bottom: 1px solid rgba(255,255,255,.2); border-radius: 16px; transition: transform .3s ease, background .3s ease, box-shadow .3s ease; }
.feature-list li > span { color: var(--gold-soft); font-size: 12px; font-weight: 800; }
.feature-list h3 { margin-bottom: 7px; font-size: 18px; }
.feature-list p { margin: 0; color: rgba(255,255,255,.7); font-size: 14px; }

.updates { background: var(--white); }
.update-list { border-top: 1px solid var(--line); }
.update-list article { display: grid; grid-template-columns: 115px 110px minmax(200px, .7fr) 1fr; gap: 20px; align-items: start; padding: 24px 8px; border-bottom: 1px solid var(--line); border-radius: 16px; transition: transform .3s ease, background .3s ease, box-shadow .3s ease; }
.update-list time { color: var(--muted); font-size: 13px; }
.version { width: fit-content; padding: 3px 8px; color: var(--sea-deep); background: var(--sky-100); border: 1px solid var(--line); border-radius: 4px; font-size: 11px; font-weight: 800; }
.update-list h3 { margin: 3px 0 0; color: var(--sea-deep); font-size: 17px; }
.update-list p { margin: 0; font-size: 14px; }

.screenshot-gallery { background: linear-gradient(180deg, var(--sky-100), var(--sky-50)); }
.screenshot-browser { display: grid; grid-template-columns: minmax(0, 1.42fr) minmax(300px, .58fr); gap: 20px; align-items: start; }
.screenshot-stage { position: relative; display: grid; place-items: center; min-height: 360px; margin: 0; padding: 12px; overflow: hidden; background: rgba(255,255,255,.65); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.screenshot-stage img { width: 100%; height: auto; max-height: 650px; object-fit: contain; border-radius: 12px; }
.screenshot-thumbnails { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.screenshot-thumb { display: grid; place-items: center; min-height: 110px; padding: 6px; background: rgba(255,255,255,.7); border: 2px solid transparent; border-radius: 16px; cursor: pointer; transition: border-color .3s ease, background .3s ease, transform .3s ease, box-shadow .3s ease; }
.screenshot-thumb img { width: 100%; height: auto; max-height: 155px; object-fit: contain; border-radius: 12px; }
.screenshot-thumb:hover { transform: translateY(-2px); background: var(--white); box-shadow: 0 8px 20px rgba(16,97,120,.13); }
.screenshot-thumb.is-active, .screenshot-thumb[aria-pressed="true"] { border-color: var(--coral); background: var(--white); box-shadow: 0 8px 20px rgba(217,71,104,.16); }

.faq { background: var(--white); }
.faq-layout { display: block; }
.faq-intro { position: static; max-width: 780px; margin-bottom: 44px; }
.faq-intro h2 { margin-bottom: 18px; }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--coral-dark); border-bottom: 1px solid currentColor; font-weight: 750; transition: transform .3s ease, color .3s ease, filter .3s ease; }
.accordion { border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); border-radius: 16px; transition: transform .3s ease, background .3s ease, box-shadow .3s ease; }
.accordion summary { position: relative; padding: 23px 42px 23px 0; color: var(--ink); cursor: pointer; list-style: none; font-weight: 750; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary span::before, .accordion summary span::after { content: ""; position: absolute; top: 50%; right: 7px; width: 15px; height: 2px; background: var(--sea); transition: transform .3s ease; }
.accordion summary span::after { transform: rotate(90deg); }
.accordion details[open] summary span::after { transform: rotate(0); }
.accordion details p { max-width: 780px; margin: -5px 42px 22px 0; font-size: 14px; }

.friend-links { padding: 62px 0 64px; color: var(--white); background: var(--sea-deep); }
.friend-links-inner { width: min(calc(100% - 40px), var(--max)); margin: auto; text-align: center; }
.friend-links-kicker { margin-bottom: 7px; color: var(--gold-soft); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.friend-links h2 { margin-bottom: 27px; color: var(--white); font-size: clamp(22px, 2.5vw, 34px); }
.friend-links-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.friend-links-list a { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 20px; color: var(--white); background: rgba(255,255,255,.11); border: 1px solid rgba(255,255,255,.15); border-radius: 999px; box-shadow: inset 0 1px 0 rgba(255,255,255,.08); font-size: 14px; font-weight: 700; transition: transform .3s ease, color .3s ease, background .3s ease, border-color .3s ease, box-shadow .3s ease; }

.site-footer { color: rgba(255,255,255,.74); background: #083f50; }
.footer-inner { width: min(calc(100% - 40px), var(--max)); margin: auto; padding: 48px 0 32px; display: grid; grid-template-columns: 1.1fr .8fr 1.1fr; gap: 45px; align-items: start; }
.footer-inner strong { color: var(--white); font-size: 15px; }
.footer-inner p { color: inherit; font-size: 12px; }
.footer-inner nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; font-size: 12px; }
.footer-inner nav a:hover { color: var(--gold-soft); }
.copyright { margin: 0; text-align: right; }
.floating-cta { position: fixed; z-index: 91; right: 20px; bottom: 76px; min-height: 46px; display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; color: var(--white); background: var(--coral); border-radius: 999px; box-shadow: 0 10px 24px rgba(217,71,104,.3); font-size: 13px; font-weight: 800; transition: transform .3s ease, background .3s ease, box-shadow .3s ease, filter .3s ease; }
.floating-cta:hover, .floating-cta:focus-visible { color: var(--white); background: var(--coral-dark); transform: translateY(-2px) scale(1.035); box-shadow: 0 14px 28px rgba(217,71,104,.36); filter: brightness(1.08); }
.back-to-top { position: fixed; z-index: 90; right: 20px; bottom: 20px; width: 44px; height: 44px; display: grid; place-items: center; padding: 0; color: var(--white); background: var(--sea); border: 0; border-radius: 999px; box-shadow: 0 8px 22px rgba(0,83,105,.24); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: opacity .3s ease, visibility .3s ease, transform .3s ease, box-shadow .3s ease, filter .3s ease; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }

@media (hover: hover) {
  .menu-toggle:hover, .menu-toggle:focus-visible { background: rgba(255,255,255,.12); transform: scale(1.06); filter: brightness(1.1); }
  .nav-cta:hover, .nav-cta:focus-visible { color: var(--white); transform: translateY(-2px) scale(1.035); box-shadow: 0 12px 26px rgba(217,71,104,.36); filter: brightness(1.08); }
  .text-link:hover, .text-link:focus-visible { color: var(--coral); transform: scale(1.025); filter: brightness(1.06); }
  .friend-links-list a:hover, .friend-links-list a:focus-visible { color: var(--white); background: rgba(255,255,255,.2); border-color: rgba(255,225,161,.7); box-shadow: 0 10px 26px rgba(0,0,0,.2), 0 0 0 1px rgba(255,225,161,.15); transform: translateY(-3px) scale(1.025); }
  .back-to-top.visible:hover, .back-to-top.visible:focus-visible { transform: translateY(-2px) scale(1.06); box-shadow: 0 12px 28px rgba(0,83,105,.32); filter: brightness(1.1); }

  .info-block:hover { position: relative; z-index: 1; background: var(--white); transform: translateY(-6px); box-shadow: 0 16px 32px rgba(34,174,181,.26), 0 0 0 1px rgba(34,174,181,.18); }
  .screenshot-thumb:hover { transform: translateY(-5px); background: var(--white); box-shadow: 0 14px 28px rgba(217,71,104,.24), 0 0 0 1px rgba(217,71,104,.18); }
  .guide-step:hover { position: relative; z-index: 1; background: rgba(255,255,255,.7); transform: translateY(-4px); box-shadow: 0 14px 28px rgba(34,174,181,.2), 0 0 0 1px rgba(34,174,181,.14); }
  .feature-list li:hover { position: relative; z-index: 1; background: rgba(255,255,255,.1); transform: translateY(-4px); box-shadow: 0 14px 28px rgba(0,0,0,.18), 0 0 0 1px rgba(255,225,161,.2); }
  .update-list article:hover { position: relative; z-index: 1; background: var(--sky-50); transform: translateY(-4px); box-shadow: 0 14px 28px rgba(34,174,181,.18), 0 0 0 1px rgba(34,174,181,.14); }
  .accordion details:hover { position: relative; z-index: 1; background: var(--sky-50); transform: translateY(-3px); box-shadow: 0 12px 26px rgba(34,174,181,.16), 0 0 0 1px rgba(34,174,181,.14); }

  .wide-media::after, .landscape-frame::after, .guide-photo::after, .feature-photo::after, .screenshot-stage::after { content: ""; position: absolute; z-index: 1; inset: 0; pointer-events: none; background: linear-gradient(135deg, rgba(7,91,115,.05), rgba(34,174,181,.28)); opacity: 0; transition: opacity .3s ease; }
  .wide-media img, .landscape-frame img, .guide-photo img, .feature-photo img, .screenshot-stage img { position: relative; z-index: 0; transition: transform .3s ease; }
  .wide-media:hover img, .landscape-frame:hover img, .guide-photo:hover img, .feature-photo:hover img, .screenshot-stage:hover img { transform: scale(1.035); }
  .wide-media:hover::after, .landscape-frame:hover::after, .guide-photo:hover::after, .feature-photo:hover::after, .screenshot-stage:hover::after { opacity: 1; }
  .guide-photo figcaption { position: relative; z-index: 2; }
}

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

@media (max-width: 1040px) {
  .menu-toggle { display: block; position: relative; z-index: 2; color: inherit; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav { position: fixed; inset: var(--header-height) 0 auto; max-height: calc(100svh - var(--header-height)); display: grid; gap: 0; padding: 14px 20px 24px; color: var(--ink); background: rgba(255,255,255,.98); box-shadow: 0 20px 35px rgba(10,76,95,.16); overflow-y: auto; transform: translateY(-120%); opacity: 0; visibility: hidden; transition: transform .24s ease, opacity .2s ease, visibility .2s ease; }
  .site-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .site-nav > a { padding: 13px 10px !important; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: 12px; text-align: center; border-bottom: 0; }
  .spec-strip { grid-template-columns: 1fr 1fr; }
  .spec-strip div:nth-child(3) { border-left: 0; }
  .content-grid { grid-template-columns: 1fr 1fr; }
  .guide-layout { gap: 36px; }
  .update-list article { grid-template-columns: 105px 100px 1fr; }
  .update-list p { grid-column: 3; }
}

@media (max-width: 760px) {
  :root { --header-height: 64px; }
  .nav-shell, .section-inner, .hero-content, .footer-inner { width: min(calc(100% - 32px), var(--max)); }
  .brand { min-width: 0; }
  .brand-logo { width: 78px; height: 40px; }
  .brand-copy strong { font-size: 11px; }
  .hero { min-height: 760px; align-items: end; padding-bottom: 78px; }
  .hero-media { object-position: 60% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(3,47,62,.95) 0%, rgba(3,56,72,.75) 52%, rgba(3,58,75,.25) 100%); }
  .hero-content { margin: 0 auto; }
  .hero h1 { font-size: clamp(33px, 9.5vw, 50px); overflow-wrap: anywhere; }
  .hero h1 span { font-size: .36em; }
  .hero-cn { font-size: 18px; }
  .hero-lead { font-size: 15px; }
  .hero-actions .button { width: 100%; }
  .hero-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 0; }
  .hero-facts div { min-width: 0; padding: 0 14px; }
  .hero-facts div:nth-child(3) { padding-left: 0; border-left: 0; }
  .scroll-cue { display: none; }
  .section { padding: 76px 0; }
  .section-heading { display: block; margin-bottom: 32px; }
  .section-heading > p { margin-top: 16px; }
  .intro-grid, .attributes-grid, .guide-layout, .feature-layout { grid-template-columns: 1fr; }
  .poster-frame { max-width: 440px; margin: 0 auto; }
  .intro-copy { margin-top: 15px; }
  .spec-strip div { padding-left: 10px; }
  .wide-media { margin-right: -16px; margin-left: -16px; }
  .wide-media figcaption { position: static; max-width: none; }
  .content-grid { grid-template-columns: 1fr; }
  .info-block { min-height: 0; padding: 26px; }
  .attributes-grid { gap: 38px; }
  .guide-layout { gap: 38px; }
  .guide-photo, .faq-intro { position: static; }
  .feature-layout { gap: 42px; }
  .update-list article { grid-template-columns: 1fr auto; gap: 8px 14px; padding: 22px 0; }
  .update-list h3, .update-list p { grid-column: 1 / -1; }
  .update-list h3 { margin-top: 7px; }
  .screenshot-browser { grid-template-columns: 1fr; }
  .screenshot-stage { min-height: 0; }
  .friend-links { padding: 52px 0; }
  .friend-links-inner { width: min(calc(100% - 32px), var(--max)); }
  .friend-links h2 { font-size: clamp(22px, 6.2vw, 30px); }
  .friend-links-list { gap: 10px; }
  .friend-links-list a { flex: 1 1 150px; }
  .floating-cta { right: 16px; bottom: calc(72px + env(safe-area-inset-bottom)); }
  .back-to-top { right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .copyright { text-align: left; }
}

@media (max-width: 420px) {
  .brand-copy small { display: none; }
  .hero { min-height: 720px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts div { padding: 0; border-left: 0; }
  .spec-strip { grid-template-columns: 1fr; }
  .spec-strip div { padding-left: 0; border-left: 0; }
  .attribute { grid-template-columns: 62px 1fr; gap: 12px; }
  .guide-step { grid-template-columns: 38px 1fr; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .hero-actions, .scroll-cue, .floating-cta, .back-to-top { display: none !important; }
  .hero { min-height: auto; padding: 40px 0; background: white; color: black; }
  .hero-media, .hero-shade { display: none; }
  .hero-content { margin: 0 auto; }
  .hero p, p { color: #333; }
  .section { padding: 36px 0; break-inside: avoid; }
}