:root {
  --bg: #0d0b09;
  --bg-soft: #161210;
  --card: #1c1714;
  --card-border: rgba(255, 122, 26, .14);
  --orange: #ff7a1a;
  --orange-2: #ffb347;
  --text: #f5efe8;
  --muted: #a89b8d;
  --radius: 18px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ===== 顶栏 ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(13, 11, 9, .78);
  border-bottom: 1px solid rgba(255, 122, 26, .12);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 18px; }
.brand img { width: 40px; height: 40px; border-radius: 10px; box-shadow: 0 0 18px rgba(255, 122, 26, .45); }
.nav { display: flex; gap: 28px; font-size: 15px; color: var(--muted); }
.nav a:hover { color: var(--orange-2); }
.nav .cta {
  color: #fff; background: linear-gradient(135deg, var(--orange), #ff5e00);
  padding: 8px 18px; border-radius: 999px; font-weight: 600;
}
@media (max-width: 720px) { .nav a:not(.cta) { display: none; } }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; padding: 96px 0 72px; text-align: center; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto;
  height: 130%; pointer-events: none;
  background:
    radial-gradient(46% 55% at 50% 0%, rgba(255, 122, 26, .22), transparent 70%),
    radial-gradient(30% 40% at 78% 12%, rgba(255, 60, 0, .10), transparent 70%);
}
.hero .wrap { position: relative; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--card-border); background: rgba(255, 122, 26, .08);
  color: var(--orange-2); font-size: 14px;
  padding: 6px 16px; border-radius: 999px; margin-bottom: 26px;
}
.badge:hover { border-color: rgba(255, 122, 26, .5); }
.hero h1 {
  font-size: clamp(34px, 6vw, 60px); line-height: 1.25; font-weight: 800; letter-spacing: .02em;
}
.hero h1 .grad {
  background: linear-gradient(120deg, #ffd9a8, var(--orange) 55%, #ff5e00);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub { color: var(--muted); font-size: 17px; margin: 20px auto 34px; max-width: 560px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: 16px; font-weight: 600;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #fff; background: linear-gradient(135deg, var(--orange), #ff5e00);
  box-shadow: 0 8px 28px rgba(255, 94, 0, .35);
}
.btn-ghost { border: 1px solid rgba(255, 255, 255, .18); color: var(--text); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange-2); }
.hero-meta { margin-top: 22px; color: var(--muted); font-size: 14px; }

/* ===== 双端 ===== */
.section { padding: 84px 0; }
.section-head { text-align: center; margin-bottom: 52px; }
.kicker {
  font-size: 13px; letter-spacing: .35em; text-transform: uppercase;
  color: var(--orange); margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; }
.section-head p { color: var(--muted); margin-top: 12px; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 860px) { .duo { grid-template-columns: 1fr; } }
.duo-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(160deg, var(--card), #120e0b);
  border: 1px solid var(--card-border);
  padding: 40px 36px;
}
.duo-card .tag {
  display: inline-block; font-size: 13px; color: var(--orange-2);
  border: 1px solid var(--card-border); border-radius: 999px;
  padding: 3px 14px; margin-bottom: 18px; background: rgba(255, 122, 26, .07);
}
.duo-card h3 { font-size: 24px; margin-bottom: 8px; }
.duo-card p { color: var(--muted); font-size: 15px; }
.duo-card .go {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 22px;
  color: var(--orange-2); font-weight: 600;
}
.duo-card .glow {
  position: absolute; right: -60px; bottom: -60px; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(255, 122, 26, .25), transparent 65%);
  pointer-events: none;
}

/* ===== 界面展示 ===== */
.shots { display: grid; grid-template-columns: 1.6fr 1fr; gap: 24px; align-items: center; }
@media (max-width: 860px) { .shots { grid-template-columns: 1fr; } }
.shot {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--card-border);
  background: var(--card);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5), 0 0 40px rgba(255, 122, 26, .08);
}
.shot img { display: block; width: 100%; height: 100%; object-fit: cover; }
.shot .cap {
  position: absolute; left: 14px; bottom: 14px;
  background: rgba(13, 11, 9, .78); backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  padding: 6px 16px; border-radius: 999px; font-size: 13px; color: var(--orange-2);
}
.shot-mobile { max-width: 340px; margin: 0 auto; border-radius: 26px; border: 2px solid rgba(255, 122, 26, .25); }

/* ===== 特性 ===== */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 960px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }
.feat {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 28px 24px;
  transition: border-color .2s, transform .2s;
}
.feat:hover { border-color: rgba(255, 122, 26, .45); transform: translateY(-4px); }
.feat .ico {
  width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 22px; background: rgba(255, 122, 26, .12); margin-bottom: 16px;
}
.feat h3 { font-size: 17px; margin-bottom: 8px; }
.feat p { color: var(--muted); font-size: 14px; }

/* ===== 下载 ===== */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 860px) { .dl-grid { grid-template-columns: 1fr; } }
.dl-card {
  background: linear-gradient(170deg, var(--card), #14100d);
  border: 1px solid var(--card-border); border-radius: var(--radius); padding: 30px 30px 26px;
  display: flex; flex-direction: column; gap: 14px;
}
.dl-card .row1 { display: flex; align-items: center; gap: 14px; }
.dl-card .appico {
  width: 52px; height: 52px; border-radius: 12px; flex: none;
  box-shadow: 0 0 16px rgba(255, 122, 26, .35);
}
.dl-card h3 { font-size: 18px; }
.dl-card .ver { color: var(--orange-2); font-size: 13px; }
.dl-card .changelog { color: var(--muted); font-size: 14px; min-height: 24px; }
.dl-card .info { color: var(--muted); font-size: 13px; }
.dl-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.btn-sm { padding: 10px 20px; font-size: 14px; border-radius: 999px; }
.btn-site { color: #fff; background: linear-gradient(135deg, var(--orange), #ff5e00); box-shadow: 0 6px 18px rgba(255, 94, 0, .3); }
.btn-lz { border: 1px solid rgba(255, 255, 255, .2); color: var(--text); }
.btn-lz:hover { border-color: var(--orange); color: var(--orange-2); }
.btn[aria-disabled="true"] { opacity: .45; pointer-events: none; }
.dl-tip {
  font-size: 13px; color: var(--muted);
  background: rgba(255, 122, 26, .07); border: 1px dashed rgba(255, 122, 26, .3);
  border-radius: 10px; padding: 8px 12px;
}
.dl-tip a { color: var(--orange-2); font-weight: 600; }
.dl-tip b { color: var(--orange-2); font-weight: 600; }

.arch-tag {
  display: inline-block; margin-left: 8px; padding: 1px 9px;
  font-size: 11px; color: var(--orange-2);
  border: 1px solid rgba(255, 122, 26, .4); border-radius: 999px;
  background: rgba(255, 122, 26, .1); vertical-align: 1px;
}
.arch-tag.arch-new { color: #8fd3a8; border-color: rgba(143, 211, 168, .35); background: rgba(143, 211, 168, .08); }

/* ===== 网盘教程 ===== */
.guide { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: center; }
@media (max-width: 860px) { .guide { grid-template-columns: 1fr; } .guide-img { max-width: 360px; margin: 0 auto; } }
.gstep { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px dashed rgba(255, 122, 26, .15); }
.gstep:last-of-type { border-bottom: none; }
.gstep > b {
  flex: none; width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--orange), #ff5e00); color: #fff; font-size: 15px;
}
.gstep h4 { font-size: 16px; margin-bottom: 4px; }
.gstep p { color: var(--muted); font-size: 14px; }
.gstep p b { color: var(--orange-2); }
.gnote { color: var(--muted); font-size: 13px; margin-top: 14px; }
.guide-img img {
  width: 100%; display: block; border-radius: 20px;
  border: 1px solid var(--card-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
}

/* ===== 步骤 ===== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 32px 28px; position: relative;
}
.step .num {
  font-size: 44px; font-weight: 800; line-height: 1;
  background: linear-gradient(180deg, var(--orange-2), rgba(255, 94, 0, .25));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14px; }
.step p b { color: var(--orange-2); font-weight: 600; }

/* ===== 页脚 ===== */
footer { border-top: 1px solid rgba(255, 122, 26, .1); padding: 36px 0 42px; }
footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
footer .brand img { width: 30px; height: 30px; border-radius: 8px; }