/* ============================================================
   下载中心页 · 像素复古风（复刻 dnfretro.com/download.html）
   ============================================================ */
:root {
  --ink: #1A1A1A;
  --paper: #FAF3E2;
  --red: #E3350D;
  --blue: #2A75BB;
  --yellow: #FFCB05;
  --green: #4EBC5B;
  --ghost: #3B2D66;
  --orange: #F08A24;
  --pink: #EC4899;
  --cyan: #12A0C4;
  --gold: #E0A320;
  --muted: #6E6754;
  --px: 'Press Start 2P', 'Noto Sans SC', monospace;
  --sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  /* 纸张底纹 */
  background-image:
    radial-gradient(rgba(26, 26, 26, 0.045) 1px, transparent 1px),
    radial-gradient(rgba(26, 26, 26, 0.03) 1px, transparent 1px);
  background-size: 26px 26px, 52px 52px;
  background-position: 0 0, 13px 13px;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap { max-width: 1240px; margin: 0 auto; padding: 0 28px; }

main > section { padding: 64px 0 8px; }
main > section + section { padding-top: 56px; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 60;
  background: var(--ink); color: #fff;
  box-shadow: 0 4px 0 rgba(26, 26, 26, 0.15);
}
.topbar-in { max-width: 1240px; margin: 0 auto; padding: 0 28px; height: 62px; display: flex; align-items: center; gap: 18px; }
.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.logo {
  width: 40px; height: 34px; background: var(--red);
  border: 3px solid #fff; display: grid; place-items: center; flex: none;
}
.logo svg { width: 19px; height: 16px; color: #fff; }
.brand-txt b { display: block; font-family: var(--px); font-size: 10px; color: var(--yellow); letter-spacing: 1px; line-height: 1.4; }
.brand-txt i { display: block; font-style: normal; font-size: 10px; color: #B9B3A6; margin-top: 3px; letter-spacing: 2px; }
.menu { display: flex; margin-left: auto; flex-wrap: wrap; }
.menu a { display: block; padding: 7px 12px; font-size: 14px; font-weight: 500; transition: background 0.12s, color 0.12s; }
.menu a:hover, .menu a.on { background: var(--yellow); color: var(--ink); }
.menu a.on { font-weight: 900; }
.burger {
  display: none; margin-left: auto; width: 44px; height: 38px;
  background: none; border: 3px solid #fff;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
  cursor: pointer;
}
.burger span { width: 20px; height: 3px; background: #fff; }

/* ---------- 首屏 ---------- */
.hero-v { position: relative; overflow: hidden; border-bottom: 4px solid var(--ink); padding-top: 0 !important; }
.hero-in {
  position: relative; z-index: 2; max-width: 1240px; margin: 0 auto;
  padding: 56px 28px 110px;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 40px; align-items: center;
}
.v-kicker {
  font-family: var(--px); font-size: 10px; letter-spacing: 2px;
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  padding: 9px 12px; margin-bottom: 24px;
}
.v-kicker i { width: 8px; height: 8px; background: var(--yellow); flex: none; }
.hero-v h1 { line-height: 1.2; }
.title-block {
  display: inline-block;
  background: var(--yellow); border: 4px solid var(--ink); box-shadow: 8px 8px 0 var(--ink);
  padding: 0.12em 0.22em 0.16em;
  font-size: clamp(30px, 5vw, 58px); font-weight: 900; letter-spacing: 2px; color: var(--blue);
  text-shadow:
    3px 0 0 var(--ink), -3px 0 0 var(--ink), 0 3px 0 var(--ink), 0 -3px 0 var(--ink),
    3px 3px 0 var(--ink), -3px 3px 0 var(--ink), 3px -3px 0 var(--ink), -3px -3px 0 var(--ink);
}
.hero-desc { margin-top: 24px; font-size: 17px; line-height: 2; max-width: 30em; font-weight: 500; }
.hero-desc em {
  font-style: normal; font-weight: 900;
  background: var(--yellow); padding: 2px 6px; box-shadow: 2px 2px 0 var(--ink);
}
.big-ic {
  display: inline-block;
  background: var(--yellow); border: 4px solid var(--ink); box-shadow: 8px 8px 0 var(--ink);
  padding: 20px; animation: drop 0.55s steps(5) 0.12s both;
}
.big-ic svg { width: clamp(80px, 10vw, 120px); height: auto; color: var(--ink); }
.cloud { position: absolute; z-index: 1; pointer-events: none; animation: drift 10s ease-in-out infinite alternate; color: #fff; }
.cloud svg { width: 100%; height: 100%; display: block; }
.c1x { left: 8%; top: 12%; width: 86px; height: 51px; }
.c2x { right: 14%; top: 6%; width: 62px; height: 37px; animation-duration: 13s; }
.hero-ground {
  position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 64px; z-index: 0;
  background:
    repeating-linear-gradient(90deg, transparent 0 40px, var(--ink) 40px 44px),
    repeating-linear-gradient(0deg, #C9855B 0 28px, #5B3A25 28px 32px, #C9855B 32px 60px),
    #C9855B;
  border-top: 4px solid var(--ink);
}

/* ---------- 板块标题 ---------- */
.section-tag {
  display: inline-flex; align-items: center; gap: 12px;
  background: var(--ink); color: #fff;
  padding: 10px 16px; margin-bottom: 20px;
  box-shadow: 5px 5px 0 var(--yellow);
  font-size: 16px; font-weight: 900; letter-spacing: 2px;
}
.section-tag::before { content: ""; width: 8px; height: 8px; background: var(--red); flex: none; }
.section-tag .en { font-family: var(--px); font-weight: 400; font-size: 10px; color: var(--yellow); letter-spacing: 1px; }
.sec-head { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-bottom: 4px; }
.hint-tag {
  font-family: var(--px); font-size: 9px; letter-spacing: 1px;
  background: #fff; color: var(--ink);
  border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  padding: 9px 11px;
}
.dl-head { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-bottom: 16px; }
.dl-random {
  font-family: var(--px); font-size: 9px; letter-spacing: 1px;
  background: var(--yellow); color: var(--ink);
  border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  padding: 9px 11px; animation: blink 2.2s steps(1) infinite;
}

/* ---------- 版本列表 ---------- */
.vlist { display: flex; flex-direction: column; gap: 14px; }
.vrow {
  display: flex; align-items: center; gap: 18px;
  background: #fff; border: 4px solid var(--ink); box-shadow: 6px 6px 0 var(--ink);
  padding: 14px 18px;
  transition: transform 0.16s steps(3), box-shadow 0.16s steps(3);
}
.vrow:hover { transform: translateY(-4px); box-shadow: 9px 9px 0 var(--ink); }
.v-num {
  width: 88px; flex: none; text-align: center;
  border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  padding: 12px 0 9px; color: #fff;
}
.v-num b { display: block; font-family: var(--px); font-size: 26px; line-height: 1; }
.v-num b.vplus { font-size: 19px; padding-top: 4px; }
.v-num i { display: block; font-style: normal; font-family: var(--px); font-size: 8px; margin-top: 8px; letter-spacing: 1px; opacity: 0.85; }
.vrow:hover .v-num b { animation: numJump 0.4s steps(2); }
.vr-red .v-num { background: var(--red); }
.vr-blue .v-num { background: var(--blue); }
.vr-green .v-num { background: var(--green); }
.vr-orange .v-num { background: var(--orange); }
.vr-ghost .v-num { background: var(--ghost); }
.vr-pink .v-num { background: var(--pink); }
.vr-cyan .v-num { background: var(--cyan); }
.vr-gold .v-num { background: var(--gold); }
.v-info { flex: 1; min-width: 200px; }
.v-en { display: block; font-family: var(--px); font-size: 8px; letter-spacing: 1px; color: var(--muted); margin-bottom: 6px; }
.v-info h3 { font-size: 19px; font-weight: 900; letter-spacing: 1px; }
.v-mode {
  display: inline-block; vertical-align: 3px; margin-left: 8px;
  padding: 2px 8px; font-size: 11px; font-weight: 900;
  border: 2px solid var(--ink); box-shadow: 2px 2px 0 var(--ink); color: #fff;
}
.vr-red .v-mode { background: var(--red); }
.vr-green .v-mode { background: var(--green); }
.vr-blue .v-mode { background: var(--blue); }
.vr-orange .v-mode { background: var(--orange); }
.vr-ghost .v-mode { background: var(--ghost); }
.vr-pink .v-mode { background: var(--pink); }
.vr-cyan .v-mode { background: var(--cyan); }
.vr-gold .v-mode { background: var(--gold); }
.v-info p { font-size: 13.5px; line-height: 1.8; color: #4A453A; margin-top: 6px; }
.v-btns { display: flex; gap: 10px; flex: none; }
.v-btns .btn { padding: 11px 18px; font-size: 13px; }
.btn {
  text-align: center; display: inline-block; padding: 12px 6px;
  font-size: 14px; font-weight: 900; letter-spacing: 1px;
  border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  transition: transform 0.1s, box-shadow 0.1s; cursor: pointer;
}
.btn:hover { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn:active { transform: translate(4px, 4px); box-shadow: 0 0 0 var(--ink); }
.btn-down { background: var(--ink); color: #fff; }
.btn-join { background: #fff; color: var(--ink); }
.v-rnd {
  display: inline-block; vertical-align: 3px; margin-left: 8px;
  font-family: var(--px); font-size: 8px; letter-spacing: 1px;
  background: var(--yellow); color: var(--ink);
  border: 2px solid var(--ink); box-shadow: 2px 2px 0 var(--ink);
  padding: 4px 6px;
}

/* ---------- 安装指引 ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.step {
  background: #fff; border: 4px solid var(--ink); box-shadow: 6px 6px 0 var(--ink);
  padding: 18px;
  transition: transform 0.16s steps(3), box-shadow 0.16s steps(3);
}
.step:hover { transform: translateY(-4px); box-shadow: 9px 9px 0 var(--ink); }
.step-no {
  font-family: var(--px); font-size: 24px; line-height: 1;
  display: inline-block; color: var(--yellow);
  text-shadow:
    2px 0 0 var(--ink), -2px 0 0 var(--ink), 0 2px 0 var(--ink), 0 -2px 0 var(--ink),
    2px 2px 0 var(--ink), -2px 2px 0 var(--ink), 2px -2px 0 var(--ink), -2px -2px 0 var(--ink),
    4px 4px 0 var(--ink);
  margin-bottom: 12px;
}
.step h3 { font-size: 17px; font-weight: 900; letter-spacing: 1px; }
.step p { font-size: 13px; line-height: 1.9; color: #4A453A; margin-top: 8px; }

/* ---------- 配置要求 ---------- */
.spec-wrap { overflow-x: auto; }
.spec { min-width: 600px; background: #fff; border: 4px solid var(--ink); box-shadow: 6px 6px 0 var(--ink); }
.spec-row { display: grid; grid-template-columns: 140px 1fr 1fr; }
.spec-row > div { padding: 11px 14px; font-size: 13px; border-left: 3px solid var(--ink); }
.spec-row > div:first-child { border-left: 0; background: var(--paper); font-weight: 900; }
.spec-row + .spec-row > div { border-top: 3px solid var(--ink); }
.spec-head > div { background: var(--ink); color: #fff; font-weight: 900; border-left-color: #3A3A3A; }

/* ---------- 下载问答 ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border: 3px solid var(--ink); transition: box-shadow 0.2s; }
.faq-item.open { box-shadow: 5px 5px 0 var(--yellow); }
.faq-q {
  width: 100%; display: flex; align-items: center; gap: 11px;
  padding: 14px; background: none; border: 0;
  font-size: 15px; font-weight: 700; color: var(--ink); text-align: left;
  font-family: var(--sans); cursor: pointer; transition: background 0.12s;
}
.faq-q:hover { background: #FFF3D6; }
.faq-no { font-family: var(--px); font-size: 9px; flex: none; background: var(--ink); color: var(--yellow); padding: 6px 7px; }
.faq-arrow {
  margin-left: auto; flex: none; width: 0; height: 0;
  border-left: 7px solid transparent; border-right: 7px solid transparent;
  border-top: 9px solid var(--ink); transition: transform 0.25s steps(3);
}
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.3s ease; }
.faq-a > div { overflow: hidden; }
.faq-a p { padding: 0 16px 16px; font-size: 13.5px; line-height: 2; color: #4A453A; }
.faq-item.open .faq-a { grid-template-rows: 1fr; }

/* ---------- 页脚 ---------- */
.site-foot { background: var(--ink); color: #CFC9BC; margin-top: 72px; }
.footer-strip { display: flex; height: 10px; }
.footer-strip span { flex: 1; }
.footer-strip span:nth-child(1) { background: var(--red); }
.footer-strip span:nth-child(2) { background: var(--yellow); }
.footer-strip span:nth-child(3) { background: var(--blue); }
.foot-grid {
  max-width: 1240px; margin: 0 auto;
  display: grid; grid-template-columns: 1.6fr 1fr 1.1fr; gap: 36px;
  padding: 48px 28px 36px;
}
.foot-grid h4 { color: #fff; font-size: 15px; font-weight: 900; letter-spacing: 2px; display: flex; align-items: center; gap: 9px; margin-bottom: 14px; }
.foot-grid h4::before { content: ""; width: 8px; height: 8px; background: var(--yellow); flex: none; }
.foot-grid p, .foot-grid li { font-size: 13px; line-height: 2.1; }
.foot-grid a { transition: color 0.12s; }
.foot-grid a:hover { color: var(--yellow); }
.copyright {
  border-top: 3px solid #3A3A3A;
  padding: 18px 28px; font-size: 12px; color: #8F897C;
  text-align: center; letter-spacing: 1px;
}

/* ---------- Toast / 回顶 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 30px; z-index: 99;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--ink); color: #fff; border: 3px solid var(--yellow);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.35);
  padding: 13px 22px; font-size: 13px; font-weight: 700; letter-spacing: 1px;
  transition: transform 0.2s steps(3), opacity 0.2s;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.to-top {
  position: fixed; right: 22px; bottom: 26px; z-index: 80;
  width: 46px; height: 46px;
  background: var(--yellow); color: var(--ink);
  border: 3px solid var(--ink); box-shadow: 3px 3px 0 var(--ink);
  font-size: 16px; font-weight: 900; cursor: pointer;
  opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s steps(3), box-shadow 0.1s;
  font-family: var(--sans);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { box-shadow: 1px 1px 0 var(--ink); }
.to-top:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }

/* ---------- 滚动显现 ---------- */
.rv { opacity: 0; transform: translateY(16px); transition: opacity 0.45s steps(4), transform 0.45s steps(4); }
.rv.in { opacity: 1; transform: translateY(0); }

/* ---------- 动画 ---------- */
@keyframes drop { from { transform: translateY(-26px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes drift { from { transform: translateX(-22px); } to { transform: translateX(22px); } }
@keyframes blink { 0%, 55% { opacity: 1; } 56%, 100% { opacity: 0; } }
@keyframes numJump { 50% { transform: translateY(-7px); } }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-in { grid-template-columns: 1fr; gap: 26px; padding: 44px 22px 96px; }
  .big-ic { justify-self: start; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 720px) {
  .burger { display: flex; }
  .menu {
    display: none; position: absolute; left: 0; right: 0; top: 62px;
    flex-direction: column; gap: 0;
    background: var(--ink); border-top: 3px solid var(--yellow);
    padding: 10px 18px 16px; margin-left: 0;
  }
  .topbar.open .menu { display: flex; }
  .menu a { padding: 12px 10px; font-size: 15px; }
  .vrow { flex-wrap: wrap; gap: 14px; }
  .v-btns { width: 100%; }
  .v-btns .btn { flex: 1; }
  .foot-grid { grid-template-columns: 1fr; gap: 24px; padding: 36px 22px 28px; }
  .copyright { padding: 16px 18px; }
  .wrap { padding: 0 18px; }
  .topbar-in { padding: 0 18px; }
  .hero-desc { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .rv { opacity: 1; transform: none; }
}