/* ============================================================
   页脚 v5 — 结构借鉴 Pixabay：左品牌块（logo + 说明 + 社交图标一行）
   右侧三栏粗体标题链接；深色底，靠留白分组
   ============================================================ */
:root{
  --ft-bg:#14110e;
  --ft-line:rgba(255,255,255,.09);
  --ft-txt:rgba(255,255,255,.62);
  --ft-dim:rgba(255,255,255,.38);
  --ft-acc:#e2703f;
}
.site-footer.ftx{
  background:var(--ft-bg);
  background-image:linear-gradient(180deg,#171310 0%,#100d0b 100%);
  color:var(--ft-txt);
  margin-top:64px;
  border:0;border-radius:32px 32px 0 0;
  overflow:hidden;
}
.site-footer.ftx a{color:inherit;text-decoration:none}

/* --- 主区：左品牌 + 右三栏 --- */
.ftx-main{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,1.9fr);
  gap:clamp(32px,5vw,72px);
  padding-top:38px;padding-bottom:30px;
}
.ftx-brand{max-width:370px}
.ftx-lock{display:flex;align-items:center;gap:11px}
.ftx-lock .logo-mark{width:34px;height:34px;border-radius:10px;box-shadow:none;flex:0 0 auto}
.ftx-lock-txt{
  display:flex;align-items:baseline;gap:8px;
  font-size:17px;font-weight:850;letter-spacing:-.3px;color:#fff
}
.ftx-lock-txt em{
  font-style:normal;font-size:10.5px;font-weight:600;letter-spacing:.08em;color:var(--ft-dim)
}
.ftx-tag{margin:14px 0 0;font-size:12.5px;line-height:1.85;color:var(--ft-dim)}

/* 社交：纯图标一行（无胶囊、无文字标签） */
.ftx-social{display:flex;align-items:center;gap:17px;margin-top:19px}
.ftx-social a{color:rgba(255,255,255,.46);transition:color .18s,transform .18s}
.ftx-social a:hover{color:#fff;transform:translateY(-2px)}
.ftx-social svg{width:18px;height:18px;display:block}

/* --- 右侧三栏 --- */
.ftx-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}
.ftx-col h5{margin:0 0 16px;font-size:13.5px;font-weight:800;color:#fff;letter-spacing:-.2px}
.ftx-col a{
  display:block;width:fit-content;margin-bottom:10px;font-size:12.5px;
  color:var(--ft-txt);transition:color .15s,transform .15s
}
.ftx-col a:hover{color:#fff;transform:translateX(3px)}
.ftx-col a:last-child{margin-bottom:0}

/* --- 底栏 --- */
.ftx-bar{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding-top:13px;padding-bottom:5px;border-top:1px solid var(--ft-line);
  font-size:11px;color:rgba(255,255,255,.3)
}
.ftx-legal{display:flex;gap:16px}
.ftx-legal a{color:rgba(255,255,255,.45)}
.ftx-legal a:hover{color:var(--ft-acc)}
.ftx-top{font-size:11px;color:var(--ft-dim);white-space:nowrap;transition:.16s}
.ftx-top:hover{color:var(--ft-acc)}

/* --- 底部巨型字标 --- */
.ftx-watermark{
  font-size:clamp(30px,4.2vw,64px);line-height:1;font-weight:900;letter-spacing:-.045em;
  text-align:center;white-space:nowrap;overflow:hidden;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.07);
  padding:2px 0 6px;margin:0 -10px;user-select:none;pointer-events:none
}

@media(max-width:1000px){
  .ftx-main{grid-template-columns:1fr;gap:30px}
  .ftx-brand{max-width:none}
}
@media(max-width:640px){
  .site-footer.ftx{border-radius:24px 24px 0 0;margin-top:48px}
  .ftx-main{padding-top:28px;padding-bottom:24px;gap:26px}
  .ftx-nav{grid-template-columns:1fr 1fr;gap:24px}
  .ftx-social{gap:20px}
  .ftx-bar{flex-direction:column;align-items:flex-start;gap:8px;padding-top:12px;padding-bottom:12px}
  .ftx-watermark{font-size:44px}
}