:root {
  --emerald: #059669;
  --emerald-d: #047857;
  --emerald-dd: #064e3b;
  --emerald-l: #10b981;
  --emerald-xl: #34d399;
  --ink: #18181b;
  --ink-2: #1f1f23;
  --ink-3: #27272a;
  --ink-4: #3f3f46;
  --paper: #18181b;
  --panel: #1f1f23;
  --panel-2: #27272a;
  --line: #3f3f46;
  --line-soft: #2a2a2e;
  --muted: #a1a1aa;
  --text: #e4e4e7;
  --text-dim: #71717a;
  --lime: #84cc16;
  --amber: #f59e0b;
  --red: #ef4444;
  --shadow: 0 24px 70px rgba(0,0,0,.5);
  --shadow-sm: 0 8px 24px rgba(0,0,0,.35);
  --glow: 0 0 30px rgba(5,150,105,.35);
  --mono: "JetBrains Mono","Fira Code","Consolas","Courier New",monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }

body {
  font-family: "Microsoft YaHei","PingFang SC","Noto Sans SC",-apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .14;
  z-index: 20;
  background-image:
    linear-gradient(rgba(5,150,105,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5,150,105,.09) 1px, transparent 1px);
  background-size: 22px 22px;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
img { display: block; max-width: 100%; }
summary { list-style: none; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
:focus-visible { outline: 3px solid var(--emerald-l); outline-offset: 3px; }

/* ===== 1. 浮动圆角导航卡（blur+border+shadow+副标GEEK VAULT） ===== */
.gk-masthead {
  width: min(1240px, calc(100% - 40px));
  height: 74px;
  margin: 18px auto 0;
  padding: 0 12px 0 15px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  background: rgba(24,24,27,.82);
  border: 1px solid rgba(63,63,70,.6);
  border-radius: 17px;
  position: relative;
  z-index: 30;
  box-shadow: 0 8px 30px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.04);
  backdrop-filter: blur(12px);
}
.gk-brandmark {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: max-content;
}
.gk-brandmark img {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  box-shadow: 0 0 0 1px rgba(5,150,105,.3);
}
.gk-brandmark span { display: grid; gap: 2px; }
.gk-brandmark strong { font-size: 17px; font-weight: 800; color: #fafafa; }
.gk-brandmark small { font-size: 8px; letter-spacing: 1.6px; color: var(--emerald-l); font-weight: 700; }
.gk-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  font-size: 14px;
  color: var(--muted);
}
.gk-nav a { position: relative; padding: 12px 0; transition: color .2s; }
.gk-nav a:hover { color: var(--text); }
.gk-nav a::after {
  content: "";
  position: absolute;
  height: 2px;
  left: 0;
  right: 100%;
  bottom: 5px;
  background: var(--emerald);
  transition: right .25s ease;
}
.gk-nav a:hover::after { right: 0; }
.gk-header-action {
  padding: 14px 18px;
  color: #fff;
  background: var(--emerald);
  border-radius: 11px;
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  box-shadow: 0 8px 20px rgba(5,150,105,.3);
  transition: transform .2s, box-shadow .2s;
}
.gk-header-action:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(5,150,105,.45); }
.gk-nav-toggle { display: none; font-size: 24px; color: var(--text); justify-self: end; }

/* ===== 2. Hero 左右分栏 + 终端装置 ===== */
.gk-hero {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 60px 0 54px;
  display: grid;
  grid-template-columns: minmax(360px,.86fr) minmax(440px,1.14fr);
  align-items: center;
  gap: 48px;
  position: relative;
}
.gk-hero::before {
  content: "GEEK / VAULT / REPOSITORY";
  position: absolute;
  left: -42px;
  bottom: 52px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font: 700 10px/1 Arial, sans-serif;
  letter-spacing: 2.4px;
  color: #52525b;
}
.gk-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 19px;
  color: var(--emerald-l);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.4px;
}
.gk-kicker span { width: 27px; height: 2px; background: currentColor; }
.gk-hero h1 {
  margin: 0;
  font-size: clamp(46px,5vw,60px);
  line-height: 1.02;
  font-weight: 900;
  color: #fafafa;
  letter-spacing: -.5px;
}
.gk-hero-subtitle {
  max-width: 540px;
  margin: 22px 0 15px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.58;
  color: var(--text);
}
.gk-hero-intro { max-width: 540px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.gk-hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 29px; }
.gk-solid-action {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 16px 22px;
  color: #fff;
  background: var(--emerald);
  border: 1px solid var(--emerald);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(5,150,105,.3);
  transition: transform .2s, box-shadow .2s;
}
.gk-solid-action:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(5,150,105,.45); }
.gk-text-action {
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--ink-4);
  padding: 10px 0 5px;
  color: var(--muted);
  transition: color .2s, border-color .2s;
}
.gk-text-action:hover { color: var(--emerald-l); border-color: var(--emerald-l); }
.gk-trust-strip {
  list-style: none;
  display: flex;
  gap: 0;
  margin: 38px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-soft);
}
.gk-trust-strip li {
  min-width: 118px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding-right: 15px;
  margin-right: 15px;
  border-right: 1px solid var(--line-soft);
  font-size: 12px;
  font-weight: 800;
}
.gk-trust-strip li:last-child { border: 0; }
.gk-trust-strip i { color: var(--emerald-l); font-size: 18px; }
.gk-trust-strip small { color: var(--text-dim); font-size: 9px; font-weight: 500; }

/* 终端装置 */
.gk-term {
  margin: 0;
  position: relative;
  background: #0c0c0f;
  border: 1px solid #000;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transform: rotate(.6deg);
}
.gk-term::before {
  content: "";
  position: absolute;
  width: 190px;
  height: 190px;
  right: -20px;
  top: -24px;
  background: var(--emerald);
  border-radius: 50%;
  z-index: -1;
  opacity: .14;
  filter: blur(8px);
}
.gk-term-bar {
  min-height: 44px;
  padding: 0 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  border-bottom: 1px solid #2a2a2e;
  background: #131316;
}
.gk-term-dots { display: flex; gap: 6px; }
.gk-term-dots i { width: 11px; height: 11px; border-radius: 50%; background: #3f3f46; }
.gk-term-dots i:first-child { background: var(--red); }
.gk-term-dots i:nth-child(2) { background: var(--amber); }
.gk-term-dots i:nth-child(3) { background: var(--emerald-l); }
.gk-term-bar code { font-family: var(--mono); font-size: 12px; color: var(--emerald-xl); justify-self: center; }
.gk-term-live {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--text-dim);
}
.gk-term-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 3px rgba(132,204,22,.12); }
.gk-term-grid { display: grid; grid-template-columns: 148px 1fr 148px; gap: 12px; padding: 16px; }
.gk-term-col { display: grid; gap: 10px; align-content: center; }
.gk-term-cmd {
  padding: 12px;
  border-radius: 9px;
  border: 1px solid;
  background: var(--ink-2);
  position: relative;
}
.gk-term-cmd code { font-family: var(--mono); font-size: 11px; display: block; }
.gk-term-cmd .gk-prompt { color: var(--emerald-xl); }
.gk-term-cmd small { display: block; font-size: 9px; margin-top: 6px; letter-spacing: .8px; font-weight: 700; }
.gk-term-cmd em { font-style: normal; font-size: 8px; padding: 2px 6px; border-radius: 3px; font-weight: 800; }
.gk-term-cmd.green { border-color: rgba(5,150,105,.4); background: rgba(5,150,105,.08); }
.gk-term-cmd.green small { color: var(--emerald-xl); }
.gk-term-cmd.green em { background: rgba(5,150,105,.2); color: var(--emerald-xl); }
.gk-term-cmd.gray { border-color: rgba(113,113,122,.35); background: rgba(113,113,122,.06); }
.gk-term-cmd.gray small { color: var(--muted); }
.gk-term-cmd.gray em { background: rgba(113,113,122,.2); color: var(--muted); }
.gk-term-cmd.amber { border-color: rgba(245,158,11,.4); background: rgba(245,158,11,.08); }
.gk-term-cmd.amber small { color: var(--amber); }
.gk-term-cmd.amber em { background: rgba(245,158,11,.2); color: var(--amber); }
.gk-term-phone {
  border: 5px solid #2a2a2e;
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 12px 24px rgba(0,0,0,.4);
  position: relative;
  justify-self: center;
  max-width: 240px;
  width: 100%;
}
.gk-term-phone img { width: 100%; height: auto; }
.gk-term-phone::after {
  content: "GEEK VAULT";
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 3px 7px;
  background: rgba(0,0,0,.7);
  color: var(--emerald-xl);
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 1px;
  border-radius: 3px;
}
.gk-term-ver { padding: 12px; border-radius: 9px; border: 1px solid var(--line-soft); background: var(--ink-2); }
.gk-term-ver b { display: block; font-family: var(--mono); font-size: 18px; font-weight: 800; color: var(--emerald-xl); line-height: 1; }
.gk-term-ver span { display: block; font-size: 9px; color: var(--text-dim); margin-top: 6px; letter-spacing: .6px; }
.gk-term-ver small { display: block; font-size: 8px; color: var(--muted); margin-top: 4px; font-family: var(--mono); }
.gk-term-status {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-top: 1px solid #2a2a2e;
  background: #131316;
  font-size: 11px;
  color: var(--muted);
}
.gk-term-status i { color: var(--emerald-l); }
.gk-term-status b { color: var(--emerald-xl); font-family: var(--mono); }
.gk-term-pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--emerald-l); box-shadow: 0 0 0 3px rgba(16,185,129,.15); }
.gk-term figcaption { position: absolute; right: 18px; bottom: -27px; color: var(--text-dim); font-size: 10px; }

/* ===== 3. 软件分类6宫格（hover左轴竖线） ===== */
.gk-cats { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 24px; }
.gk-sec-head {
  display: grid;
  grid-template-columns: minmax(260px,.5fr) 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-soft);
}
.gk-sec-head h2 { font-size: clamp(28px,3.2vw,38px); font-weight: 900; line-height: 1.2; color: #fafafa; margin-top: 12px; }
.gk-sec-head p { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 620px; }
.gk-cat-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.gk-cat {
  padding: 26px 24px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  position: relative;
  overflow: hidden;
  transition: border-color .25s, transform .25s;
}
.gk-cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--emerald);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .3s;
}
.gk-cat:hover { border-color: rgba(5,150,105,.5); transform: translateY(-3px); }
.gk-cat:hover::before { transform: scaleY(1); }
.gk-cat > i {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(5,150,105,.14);
  color: var(--emerald-l);
  display: grid;
  place-items: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.gk-cat h3 { font-size: 17px; font-weight: 800; margin-bottom: 6px; color: #fafafa; }
.gk-cat-count { font-family: var(--mono); font-size: 13px; color: var(--emerald-xl); font-weight: 700; }
.gk-cat p { font-size: 12px; color: var(--muted); line-height: 1.7; margin-top: 10px; }
.gk-cat-num { position: absolute; top: 18px; right: 20px; font: 800 11px/1 var(--mono); color: var(--ink-4); }

/* ===== 4. 更新日志时间轴（垂直5节点+is-hot） ===== */
.gk-log { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0 56px; }
.gk-log-rail { position: relative; padding-left: 36px; }
.gk-log-rail::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(var(--emerald), var(--ink-4) 80%, transparent);
}
.gk-log-item {
  position: relative;
  padding: 22px 26px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  margin-bottom: 14px;
  transition: border-color .25s, transform .25s;
}
.gk-log-item:hover { border-color: rgba(5,150,105,.45); transform: translateX(4px); }
.gk-log-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--emerald);
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 2px var(--emerald);
}
.gk-log-item.is-hot::before {
  background: var(--amber);
  box-shadow: 0 0 0 2px var(--amber), 0 0 16px rgba(245,158,11,.5);
  animation: gk-pulse 2s infinite;
}
@keyframes gk-pulse {
  0%,100% { box-shadow: 0 0 0 2px var(--amber), 0 0 16px rgba(245,158,11,.5); }
  50% { box-shadow: 0 0 0 2px var(--amber), 0 0 24px rgba(245,158,11,.8); }
}
.gk-log-ver {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 800;
  color: var(--emerald-xl);
}
.gk-log-hot { font-size: 9px; padding: 2px 7px; background: var(--amber); color: #1a1a1a; border-radius: 3px; font-weight: 800; letter-spacing: .8px; }
.gk-log-item h3 { font-size: 15px; font-weight: 700; color: var(--text); margin: 8px 0 6px; }
.gk-log-item p { font-size: 13px; color: var(--muted); line-height: 1.75; }
.gk-log-time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}
.gk-log-time i { font-size: 13px; }

/* ===== 5. 软件卡2列（图标+版本+评分+下载量+下载按钮） ===== */
.gk-soft { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0; }
.gk-soft-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.gk-soft-card {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.gk-soft-card:hover { border-color: rgba(5,150,105,.5); transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.gk-soft-thumb { border-radius: 10px; overflow: hidden; border: 1px solid var(--line-soft); background: #000; aspect-ratio: 9/16; }
.gk-soft-thumb img { width: 100%; height: 100%; object-fit: cover; }
.gk-soft-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.gk-soft-head h3 { font-size: 16px; font-weight: 800; color: #fafafa; }
.gk-soft-ver {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(5,150,105,.14);
  color: var(--emerald-xl);
  border-radius: 4px;
  font-weight: 700;
}
.gk-soft-meta { display: flex; gap: 16px; margin: 10px 0 8px; font-size: 12px; color: var(--muted); align-items: center; }
.gk-soft-meta b { color: var(--emerald-l); font-weight: 700; }
.gk-soft-stars { color: var(--amber); letter-spacing: 1px; }
.gk-soft-card p { font-size: 12px; color: var(--muted); line-height: 1.7; margin-bottom: 14px; }
.gk-soft-dl {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  background: var(--emerald);
  color: #fff;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  transition: background .2s, transform .2s;
}
.gk-soft-dl:hover { background: var(--emerald-d); transform: translateY(-1px); }

/* ===== 6. 暗色评论2列 + 极客指数评分 ===== */
.gk-voices { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0; }
.gk-voices-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-soft);
}
.gk-voices-head h2 { font-size: clamp(28px,3.2vw,38px); font-weight: 900; line-height: 1.2; color: #fafafa; margin-top: 12px; }
.gk-voices-head p { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 520px; }
.gk-index {
  padding: 20px 26px;
  background: rgba(5,150,105,.1);
  border: 1px solid rgba(5,150,105,.3);
  border-radius: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
}
.gk-index b { font-family: var(--mono); font-size: 42px; font-weight: 900; color: var(--emerald-xl); line-height: 1; }
.gk-index small { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }
.gk-index .gk-bar { height: 6px; background: var(--ink-3); border-radius: 99px; overflow: hidden; margin-top: 8px; }
.gk-index .gk-bar i { display: block; height: 100%; width: 94%; background: linear-gradient(90deg, var(--emerald), var(--emerald-l)); border-radius: 99px; }
.gk-index > div:last-child { font-size: 12px; color: var(--muted); line-height: 1.6; }
.gk-voice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.gk-voice {
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform .25s, border-color .25s;
}
.gk-voice:hover { transform: translateY(-3px); border-color: rgba(5,150,105,.4); }
.gk-voice.dark { background: linear-gradient(135deg, rgba(5,150,105,.16), rgba(6,78,59,.08)); border-color: rgba(5,150,105,.35); }
.gk-voice-top { display: flex; align-items: center; gap: 12px; }
.gk-voice-ava {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--emerald);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 15px;
  flex-shrink: 0;
}
.gk-voice.dark .gk-voice-ava { background: var(--emerald-xl); color: var(--ink); }
.gk-voice-name { font-weight: 800; font-size: 14px; color: #fafafa; }
.gk-voice-time { font-size: 11px; color: var(--text-dim); margin-top: 2px; font-family: var(--mono); }
.gk-voice-rate { margin-left: auto; color: var(--amber); font-size: 13px; letter-spacing: 1px; }
.gk-voice-body { font-size: 13px; line-height: 1.8; color: var(--muted); position: relative; padding-left: 18px; }
.gk-voice-body::before {
  content: ">";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  color: var(--emerald-l);
  font-weight: 800;
}
.gk-voice.dark .gk-voice-body { color: var(--text); }
.gk-voice-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 11px;
  color: var(--text-dim);
}
.gk-voice-foot .gk-tag { padding: 3px 9px; border: 1px solid var(--line); border-radius: 99px; font-size: 10px; }

/* ===== 7. FAQ 左右两栏（左标题+联系卡，右details带序号） ===== */
.gk-faq {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
  display: grid;
  grid-template-columns: minmax(280px,.42fr) 1fr;
  gap: 60px;
}
.gk-faq-lead .gk-kicker { margin-bottom: 14px; }
.gk-faq-lead h2 { font-size: clamp(28px,3.2vw,38px); font-weight: 900; line-height: 1.2; color: #fafafa; margin-bottom: 18px; }
.gk-faq-lead > p { color: var(--muted); font-size: 14px; line-height: 1.8; margin-bottom: 24px; }
.gk-faq-card {
  padding: 22px;
  background: rgba(5,150,105,.08);
  border: 1px solid rgba(5,150,105,.25);
  border-radius: 14px;
}
.gk-faq-card b { display: flex; align-items: center; gap: 8px; font-size: 14px; margin-bottom: 10px; color: var(--emerald-xl); }
.gk-faq-card b i { font-size: 18px; }
.gk-faq-card small { display: block; font-size: 12px; color: var(--muted); line-height: 1.7; margin-bottom: 14px; }
.gk-faq-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--emerald);
  color: #fff;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
}
.gk-faq-list { counter-reset: gk-faq; display: grid; gap: 10px; }
.gk-faq-list details {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color .2s;
}
.gk-faq-list details[open] { border-color: var(--emerald); }
.gk-faq-list summary {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: #fafafa;
}
.gk-faq-list summary::before {
  content: counter(gk-faq, decimal-leading-zero);
  counter-increment: gk-faq;
  color: var(--emerald-xl);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-right: 14px;
}
.gk-faq-list summary i { color: var(--emerald-l); font-size: 20px; transition: transform .2s; flex-shrink: 0; }
.gk-faq-list details[open] summary i { transform: rotate(45deg); }
.gk-faq-list details p { padding: 0 22px 20px; color: var(--muted); font-size: 14px; line-height: 1.8; }

/* ===== 8. 暗绿渐变CTA全宽（左文案+右双按钮+代码SVG装饰） ===== */
.gk-cta { background: linear-gradient(135deg, var(--emerald-d) 0%, var(--emerald-dd) 100%); color: #fff; position: relative; overflow: hidden; }
.gk-cta::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 40%;
  background: rgba(0,0,0,.18);
  clip-path: polygon(0 0, 100% 0, 78% 100%, 0 100%);
}
.gk-cta-inner {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
  position: relative;
}
.gk-cta-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.gk-cta-brand img { width: 38px; height: 38px; border-radius: 9px; }
.gk-cta-brand b { font-size: 18px; font-weight: 800; }
.gk-cta h2 { font-size: clamp(26px,3vw,34px); font-weight: 900; line-height: 1.25; margin-bottom: 10px; }
.gk-cta p { font-size: 14px; opacity: .85; max-width: 520px; line-height: 1.7; }
.gk-cta-actions { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.gk-cta-btn {
  padding: 18px 28px;
  background: #fafafa;
  color: var(--ink);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  box-shadow: 0 10px 24px rgba(0,0,0,.25);
  transition: transform .2s, box-shadow .2s;
}
.gk-cta-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(0,0,0,.35); }
.gk-cta-btn.alt { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.4); box-shadow: none; }
.gk-cta-btn.alt:hover { background: rgba(255,255,255,.1); border-color: #fff; }
.gk-cta small { font-size: 11px; opacity: .7; }
.gk-cta-deco { position: absolute; right: 36px; top: 50%; transform: translateY(-50%); opacity: .12; pointer-events: none; width: 120px; height: 120px; }

/* ===== 9. 精致footer 3列 + backtop ===== */
.gk-foot {
  background: #0c0c0f;
  color: var(--text-dim);
  padding: 54px max(20px, calc((100vw - 1240px)/2)) 24px;
  border-top: 1px solid var(--line-soft);
}
.gk-foot-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid #1f1f23;
}
.gk-foot-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.gk-foot-brand img { width: 42px; height: 42px; border-radius: 11px; }
.gk-foot-brand span { display: grid; gap: 2px; }
.gk-foot-brand b { color: #fafafa; font-size: 18px; }
.gk-foot-brand small { font-size: 9px; letter-spacing: 1.4px; color: var(--text-dim); }
.gk-foot-about { font-size: 13px; line-height: 1.8; color: var(--text-dim); max-width: 380px; }
.gk-foot-col h4 { color: #fafafa; font-size: 13px; font-weight: 800; margin-bottom: 14px; letter-spacing: .6px; }
.gk-foot-col ul { list-style: none; display: grid; gap: 8px; }
.gk-foot-col a { font-size: 13px; color: var(--text-dim); transition: color .2s; }
.gk-foot-col a:hover { color: var(--emerald-l); }
.gk-foot-bottom {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-dim);
}
.gk-foot-bottom a { color: var(--text-dim); }
.gk-foot-bottom a:hover { color: var(--emerald-l); }
.gk-backtop {
  position: fixed;
  right: 24px;
  bottom: 96px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--ink-3);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 20px;
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s, background .2s;
  border: 1px solid var(--line);
}
.gk-backtop.is-show { opacity: 1; pointer-events: auto; }
.gk-backtop:hover { background: var(--emerald); transform: translateY(-2px); }

/* ===== Responsive ===== */
@media (max-width: 1080px) {
  .gk-hero { grid-template-columns: 1fr; gap: 40px; }
  .gk-hero::before { display: none; }
  .gk-term { max-width: 620px; margin: 0 auto; }
  .gk-sec-head { grid-template-columns: 1fr; gap: 16px; }
  .gk-faq { grid-template-columns: 1fr; gap: 32px; }
  .gk-voices-head { grid-template-columns: 1fr; }
  .gk-index { justify-self: start; }
  .gk-cta-inner { grid-template-columns: 1fr; }
  .gk-cta-actions { align-items: flex-start; }
  .gk-foot-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .gk-foot-brand { grid-column: 1 / -1; }
}
@media (max-width: 860px) {
  .gk-nav { display: none; position: absolute; left: 0; right: 0; top: calc(100% + 8px); padding: 12px; background: rgba(24,24,27,.98); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 30px rgba(0,0,0,.4); flex-direction: column; gap: 0; }
  .gk-nav.is-open { display: flex; }
  .gk-nav a { padding: 12px; border-bottom: 1px solid var(--line-soft); }
  .gk-nav a:last-child { border: 0; }
  .gk-nav-toggle { display: block; }
  .gk-term-grid { grid-template-columns: 1fr; }
  .gk-term-col { grid-template-columns: 1fr 1fr 1fr; }
  .gk-cat-grid { grid-template-columns: 1fr 1fr; }
  .gk-soft-grid { grid-template-columns: 1fr; }
  .gk-voice-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .gk-masthead { height: 62px; gap: 12px; padding: 0 10px; }
  .gk-brandmark strong { font-size: 15px; }
  .gk-brandmark small { display: none; }
  .gk-header-action { padding: 10px 12px; font-size: 13px; }
  .gk-hero { padding: 40px 0 30px; }
  .gk-hero h1 { font-size: 40px; }
  .gk-hero-subtitle { font-size: 18px; }
  .gk-trust-strip { flex-wrap: wrap; gap: 12px; }
  .gk-trust-strip li { border: 0; min-width: auto; padding: 0; margin: 0; }
  .gk-term { transform: none; }
  .gk-term-col { grid-template-columns: 1fr; }
  .gk-term-phone { max-width: 200px; }
  .gk-cat-grid { grid-template-columns: 1fr; }
  .gk-soft-card { grid-template-columns: 70px 1fr; gap: 14px; padding: 16px; }
  .gk-foot-inner { grid-template-columns: 1fr; }
  .gk-foot-bottom { flex-direction: column; text-align: center; }
  .gk-backtop { right: 14px; bottom: 84px; }
  .gk-cta-deco { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}