:root {
  --jade: #FAF8F5;
  --peach: #F1A3B1;
  --green: #7CA697;
  --gold: #DFB76C;
  --ink: #2B2326;
  --muted: #6F6265;
  --line: rgba(92, 70, 72, .16);
  --paper: rgba(255, 255, 255, .78);
  --shadow: 0 18px 50px rgba(82, 50, 58, .14);
  --icon-menu: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.3' stroke-linecap='round'%3E%3Cpath d='M4 7h16M4 12h16M4 17h16'/%3E%3C/svg%3E");
  --icon-close: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.3' stroke-linecap='round'%3E%3Cpath d='M6 6l12 12M18 6L6 18'/%3E%3C/svg%3E");
  --icon-download: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3v11m0 0 4-4m-4 4-4-4M5 19h14'/%3E%3C/svg%3E");
  --icon-spark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='M12 2l1.6 6.2L20 10l-6.4 1.8L12 18l-1.6-6.2L4 10l6.4-1.8L12 2Zm6.5 11 1 3.5L23 17.5l-3.5 1-1 3.5-1-3.5-3.5-1 3.5-1 1-3.5ZM5.5 14l.8 2.7L9 17.5l-2.7.8-.8 2.7-.8-2.7-2.7-.8 2.7-.8.8-2.7Z'/%3E%3C/svg%3E");
  --icon-scroll: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 4h9a3 3 0 0 1 3 3v11a2 2 0 0 1-2 2H7a3 3 0 0 1-3-3V7a3 3 0 0 1 4-3Zm0 0v13a3 3 0 0 1-3 3m7-11h4m-4 4h4'/%3E%3C/svg%3E");
  --icon-map: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m3 6 6-3 6 3 6-3v15l-6 3-6-3-6 3V6Zm6-3v15m6-12v15'/%3E%3C/svg%3E");
  --icon-star: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='m12 2.5 2.9 5.9 6.5.9-4.7 4.6 1.1 6.5-5.8-3-5.8 3 1.1-6.5-4.7-4.6 6.5-.9L12 2.5Z'/%3E%3C/svg%3E");
  --icon-clock: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.1' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 7v5l3 2'/%3E%3C/svg%3E");
  --icon-help: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M9.7 9a2.4 2.4 0 1 1 4.2 1.6c-.9.8-1.9 1.4-1.9 2.9M12 17h.01'/%3E%3C/svg%3E");
  --icon-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='5' width='18' height='14' rx='2'/%3E%3Ccircle cx='8.5' cy='10' r='1.5'/%3E%3Cpath d='m21 15-4.5-4.5L9 18'/%3E%3C/svg%3E");
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 8%, rgba(241, 163, 177, .24), transparent 28rem),
    linear-gradient(180deg, #fffaf8 0%, var(--jade) 42%, #fff 100%);
  font-family: "Noto Serif SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; }
:where(a, button, summary) {
  outline-offset: 4px;
}
:where(a, button, summary):focus-visible {
  outline: 3px solid rgba(236, 72, 153, .38);
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: .75rem 1rem;
  background: var(--ink);
  color: #fff;
  border-radius: 6px;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, .55);
  background: rgba(250, 248, 245, .86);
  backdrop-filter: blur(18px);
}
.nav-shell {
  max-width: 1180px;
  margin: 0 auto;
  min-height: 72px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0;
  border-radius: 999px;
  padding: 4px 10px 4px 4px;
  transition: background .2s ease, box-shadow .2s ease;
}
.brand img { border-radius: 8px; box-shadow: 0 8px 20px rgba(241, 163, 177, .28); }
.brand:hover {
  background: rgba(241, 163, 177, .14);
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .10);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .95rem;
}
.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 12px;
  border-radius: 999px;
  color: #51464a;
  transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.nav-links a::before,
.btn::before,
.nav-toggle::before {
  content: "";
  width: 17px;
  height: 17px;
  flex: 0 0 17px;
  background: currentColor;
  opacity: .88;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
}
.nav-links a:hover {
  background: rgba(241, 163, 177, .20);
  color: var(--ink);
  transform: translateY(-1px);
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .13), 0 8px 18px rgba(241, 163, 177, .16);
}
.nav-download {
  border-radius: 999px;
  background: radial-gradient(circle at 26% 25%, #fff3d2 0 13%, transparent 14%), linear-gradient(135deg, var(--peach), var(--gold));
  color: #321f23 !important;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(223, 183, 108, .22);
}
.nav-download:hover,
.btn.primary:hover {
  color: #24181b !important;
  background:
    radial-gradient(circle at 24% 24%, #fff8df 0 13%, transparent 14%),
    linear-gradient(135deg, #ffe1ee 0%, var(--peach) 42%, var(--gold) 100%);
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
}
[data-icon="menu"] { --icon: var(--icon-menu); }
[data-icon="close"] { --icon: var(--icon-close); }
[data-icon="download"] { --icon: var(--icon-download); }
[data-icon="spark"] { --icon: var(--icon-spark); }
[data-icon="scroll"] { --icon: var(--icon-scroll); }
[data-icon="map"] { --icon: var(--icon-map); }
[data-icon="star"] { --icon: var(--icon-star); }
[data-icon="clock"] { --icon: var(--icon-clock); }
[data-icon="help"] { --icon: var(--icon-help); }

.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: end;
  overflow: hidden;
}
.hero picture,
.hero picture img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(38, 28, 31, .70), rgba(38, 28, 31, .34) 48%, rgba(250, 248, 245, .18)),
    linear-gradient(0deg, rgba(250, 248, 245, .98) 0%, rgba(250, 248, 245, .35) 31%, transparent 60%);
}
.hero-content {
  position: relative;
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
  padding: 150px 22px 84px;
  color: #fff;
}
.eyebrow,
.kicker {
  margin: 0 0 .75rem;
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  font-size: .83rem;
}
h1, h2, h3 { line-height: 1.18; letter-spacing: 0; margin: 0; }
h1 {
  max-width: 760px;
  font-size: clamp(2.6rem, 6.5vw, 5.4rem);
  color: transparent;
  background: linear-gradient(135deg, #fff 0%, #ffe7ec 35%, var(--peach) 68%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  text-shadow: 0 14px 28px rgba(0, 0, 0, .28);
}
.hero-subtitle {
  max-width: 720px;
  margin-top: 18px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, .92);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 11px 20px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .16), 0 18px 36px rgba(223, 183, 108, .25);
}
.btn:active,
.nav-links a:active,
.quick-links a:active,
.friend-links a:active {
  transform: translateY(0) scale(.98);
}
.btn.primary {
  color: #2a1d20;
  background: radial-gradient(circle at 24% 24%, #fff8df 0 12%, transparent 13%), linear-gradient(135deg, var(--gold), #ffe0a0 45%, var(--peach));
  box-shadow: 0 16px 34px rgba(223, 183, 108, .28);
}
.btn.ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .64);
  background: rgba(255, 255, 255, .12);
}
.btn.ghost:hover {
  background: rgba(255, 255, 255, .22);
  border-color: rgba(255, 255, 255, .86);
}
.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 800px;
  margin: 42px 0 0;
}
.hero-facts div {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, .24);
  background: rgba(255, 255, 255, .14);
  border-radius: 8px;
  backdrop-filter: blur(10px);
}
.hero-facts dt { font-size: .82rem; color: rgba(255, 255, 255, .72); }
.hero-facts dd { margin: 4px 0 0; font-weight: 800; }

.quick-links {
  max-width: 1180px;
  margin: -34px auto 0;
  padding: 0 22px;
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.quick-links a {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
  font-weight: 800;
  color: #4e4246;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.quick-links a:hover {
  border-color: rgba(241, 163, 177, .52);
  transform: translateY(-2px);
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .14), var(--shadow);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 92px 22px 0;
}
.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}
.section-head .kicker {
  text-align: center;
}
.section-head h2,
.download-cta h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  text-align: center;
}
.section-head h2,
.download-cta h2 {
  font-size: clamp(1.72rem, 3.2vw, 2.72rem);
  color: transparent;
  background: linear-gradient(135deg, #34282c 0%, #a86572 42%, var(--green) 78%, #8a682c 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.section-head h2::before,
.download-cta h2::before {
  content: "";
  width: .82em;
  height: .82em;
  flex: 0 0 .82em;
  background: linear-gradient(135deg, var(--peach), var(--gold) 55%, var(--green));
  -webkit-mask: var(--heading-icon, var(--icon-spark)) center / contain no-repeat;
  mask: var(--heading-icon, var(--icon-spark)) center / contain no-repeat;
}
#introTitle { --heading-icon: var(--icon-spark); }
#contentTitle { --heading-icon: var(--icon-scroll); }
#guideTitle { --heading-icon: var(--icon-map); }
#featuresTitle { --heading-icon: var(--icon-star); }
#galleryTitle { --heading-icon: var(--icon-image); }
#updatesTitle { --heading-icon: var(--icon-clock); }
#faqTitle { --heading-icon: var(--icon-help); }
#downloadTitle { --heading-icon: var(--icon-download); }
.section-head p:not(.kicker) {
  margin-top: 14px;
  color: var(--muted);
}

.media-text {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  gap: 34px;
  align-items: center;
}
figure {
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, .82);
  background: #fff;
  box-shadow: var(--shadow);
}
figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform .45s ease, filter .45s ease;
}
figure:hover img {
  transform: scale(1.035);
  filter: saturate(1.08) contrast(1.03);
}
figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: .92rem;
  background: rgba(255, 255, 255, .88);
}
.copy {
  padding: 22px 0;
}
.copy h3,
.system-grid h3,
.timeline h3,
.feature-list h3,
.guide-note h3 {
  font-size: 1.35rem;
  color: #382a2f;
  margin-bottom: 12px;
}
.check-list {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}
.check-list li {
  position: relative;
  padding-left: 28px;
  margin: 10px 0;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--gold));
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.system-grid article,
.feature-list article,
.timeline article,
.update-list article,
.faq-list details,
.guide-note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 12px 32px rgba(82, 50, 58, .08);
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease, background .28s ease;
}
.system-grid article:hover,
.feature-list article:hover,
.timeline article:hover,
.update-list article:hover,
.faq-list details:hover,
.guide-note:hover {
  transform: translateY(-4px);
  border-color: rgba(241, 163, 177, .48);
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 18px 42px rgba(82, 50, 58, .14);
}
.system-grid article {
  overflow: hidden;
}
.system-grid article img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.system-grid article h3,
.system-grid article p {
  padding-left: 16px;
  padding-right: 16px;
}
.system-grid article h3 { padding-top: 18px; }
.system-grid article p { color: var(--muted); padding-bottom: 20px; }

.guide-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
}
.guide-section .section-head {
  grid-column: 1 / -1;
}
.timeline {
  display: grid;
  gap: 14px;
}
.timeline article {
  position: relative;
  padding: 22px 24px 20px 78px;
}
.timeline span {
  position: absolute;
  left: 22px;
  top: 24px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--peach), var(--gold));
  color: #321f23;
  font-weight: 900;
  font-size: .9rem;
}
.timeline p,
.feature-list p,
.update-list p,
.guide-note p { color: var(--muted); margin-bottom: 0; }
.guide-note {
  align-self: start;
  padding: 24px;
  border-color: rgba(223, 183, 108, .38);
  background: linear-gradient(180deg, rgba(255, 247, 226, .92), rgba(255, 255, 255, .82));
  position: sticky;
  top: 96px;
}

.feature-band {
  max-width: none;
  margin-top: 92px;
  padding: 82px max(22px, calc((100vw - 1180px) / 2)) 88px;
  background:
    linear-gradient(135deg, rgba(124, 166, 151, .16), rgba(241, 163, 177, .18)),
    var(--jade);
}
.feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.feature-list article {
  padding: 22px;
  background: rgba(255, 255, 255, .72);
}
.feature-list article:hover h3,
.system-grid article:hover h3,
.timeline article:hover h3 {
  color: #a64170;
}

.gallery {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}
.gallery-track {
  display: grid;
}
.gallery figure {
  grid-area: 1 / 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s ease;
  border: 0;
  border-radius: 8px;
  box-shadow: none;
}
.gallery figure.active {
  opacity: 1;
  pointer-events: auto;
}
.gallery-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgba(43, 35, 38, .68);
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  transition: background .2s ease, box-shadow .2s ease, transform .2s ease;
}
.gallery-btn:hover {
  background: linear-gradient(135deg, var(--peach), var(--gold));
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .16);
}
.gallery-btn.prev { left: 14px; }
.gallery-btn.next { right: 14px; }

.updates-section {
  display: block;
}
.updates-section .section-head {
  position: static;
  max-width: 760px;
}
.update-list {
  display: grid;
  gap: 12px;
}
.update-list article {
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}
.update-list article::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--peach), var(--gold));
  opacity: .45;
  transition: width .25s ease, opacity .25s ease;
}
.update-list article:hover::before {
  width: 7px;
  opacity: .9;
}
.update-list time {
  display: inline-block;
  margin-bottom: 7px;
  color: #8a5b2f;
  font-weight: 900;
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.faq-list details {
  padding: 0;
  overflow: hidden;
}
.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 900;
  list-style: none;
  transition: color .2s ease, background .2s ease;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--green);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details[open] summary,
.faq-list summary:hover {
  color: #a64170;
  background: rgba(241, 163, 177, .10);
}
.faq-list details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.download-cta {
  max-width: 1180px;
  margin: 96px auto 0;
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(43, 35, 38, .82), rgba(69, 49, 55, .70)),
    url("img/tu6.webp") center / cover;
  color: #fff;
}
.download-cta p:not(.kicker) {
  max-width: 760px;
  color: rgba(255, 255, 255, .86);
}
.download-cta h2 { color: #fff; }

.friend-links {
  max-width: none;
  margin: 54px 0 0;
  padding: 54px 22px 58px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(241, 163, 177, .32), transparent 30rem),
    linear-gradient(90deg, rgba(250, 248, 245, .95), rgba(241, 163, 177, .20) 50%, rgba(250, 248, 245, .95));
}
.friend-links h2 {
  margin: 0 0 20px;
  color: #2b2326;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  line-height: 1.2;
}
.friend-links nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  max-width: 1180px;
  margin: 0 auto;
}
.friend-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid rgba(92, 70, 72, .12);
  background: rgba(255, 255, 255, .88);
  color: #2f282b;
  font-weight: 800;
  box-shadow: 0 16px 34px rgba(82, 50, 58, .10);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.friend-links a:hover {
  transform: translateY(-2px);
  border-color: rgba(241, 163, 177, .58);
  background: #fff;
  box-shadow: 0 0 0 8px rgba(241, 163, 177, .14), 0 18px 36px rgba(82, 50, 58, .14);
}

.site-footer {
  max-width: 1180px;
  margin: 42px auto 0;
  padding: 28px 22px 40px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.site-footer a { font-weight: 800; color: #7b5c29; }

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: rgba(255, 255, 255, .96);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .hero { min-height: 650px; }
  .hero-facts,
  .quick-links,
  .system-grid,
  .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .media-text,
  .guide-section {
    grid-template-columns: 1fr;
  }
  .timeline article {
    padding: 22px 20px 20px;
  }
  .timeline span {
    position: static;
    margin-bottom: 12px;
  }
  .timeline h3 {
    display: block;
    margin-bottom: 10px;
    word-break: keep-all;
    overflow-wrap: anywhere;
  }
  .guide-note,
  .updates-section .section-head {
    position: static;
  }
}

@media (max-width: 640px) {
  .nav-shell { padding: 0 16px; }
  .brand span { font-size: .95rem; }
  .hero { min-height: 640px; }
  .hero-content { padding: 118px 16px 64px; }
  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(38, 28, 31, .52), rgba(38, 28, 31, .62)),
      linear-gradient(0deg, rgba(250, 248, 245, .98), transparent 42%);
  }
  .hero-facts,
  .quick-links,
  .system-grid,
  .feature-list,
  .faq-list {
    grid-template-columns: 1fr;
  }
  .section { padding: 66px 16px 0; }
  .feature-band { padding: 66px 16px; margin-top: 70px; }
  .download-cta {
    margin: 70px 16px 0;
    padding: 26px 20px;
    flex-direction: column;
    align-items: flex-start;
  }
  .site-footer {
    flex-direction: column;
    padding-left: 16px;
    padding-right: 16px;
  }
  .gallery-btn {
    width: 38px;
    height: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}