/* =========================
   基础变量（您最常改这里）
   ========================= */
:root{
  --bg: #0b0f17;              /* 默认纯色背景（您可改为图片/渐变） */
  --surface: rgba(255,255,255,.06);
  --surface-2: rgba(255,255,255,.09);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.62);
  --accent: #7dd3fc;          /* 点缀色 */
  --shadow: 0 10px 30px rgba(0,0,0,.28);
  --radius: 16px;
  --radius-sm: 12px;
  --max: 1080px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;

  /* 背景图片留空：如需图片，改成：
     --bg-image: url("../img/your-bg.jpg");
  */
  --bg-image: none;
}

/* 背景层（留空可不动） */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  opacity: .35;
  pointer-events: none;
  z-index: -1;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}

a{ color: inherit; text-decoration: none; }
.muted{ color: var(--muted); }
.mono{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace; }
.accent{ color: var(--accent); }

.container{
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* =========================
   Header / Nav
   ========================= */
.site-header{
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(10,14,22,.55);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.header-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: .2px;
}
.brand-mark{
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,.05);
}

.site-nav{
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link{
  padding: 8px 12px;
  border-radius: 12px;
  color: var(--muted);
  border: 1px solid transparent;
}
.nav-link:hover{
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,.04);
}
.nav-link.is-active{
  color: var(--text);
  border-color: rgba(125,211,252,.35);
  background: rgba(125,211,252,.10);
}

.nav-toggle{
  display: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
  color: var(--text);
  box-shadow: var(--shadow);
}
.nav-toggle-bar{
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: rgba(255,255,255,.85);
  border-radius: 999px;
}

/* =========================
   Layout blocks
   ========================= */
.hero{ padding: 28px 0 22px; }
.hero-card{
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-radius: calc(var(--radius) + 6px);
  padding: 22px;
  box-shadow: var(--shadow);
}

.hero-title{
  margin: 0 0 6px;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
}
.hero-subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.6;
}

.page-head{ padding: 22px 0 10px; }
.page-title{ margin: 0 0 8px; font-size: clamp(22px, 3vw, 30px); }
.page-subtitle{ margin: 0; color: var(--muted); line-height: 1.6; }

.grid-3{
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0,1fr));
}
.grid-2{
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0,1fr));
}
.split{
  display: grid;
  gap: 14px;
  grid-template-columns: 1.2fr .8fr;
  margin-top: 14px;
}

.card{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
  border-radius: var(--radius);
  padding: 14px;
}

.card-label{
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}
.card-value{
  font-size: 18px;
  font-weight: 700;
}
.card-actions{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.hint{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.list{
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.kv{ display: grid; gap: 10px; }
.kv-row{
  display: grid;
  grid-template-columns: 70px 1fr auto;
  align-items: center;
  gap: 10px;
}
.kv-k{ color: var(--muted); font-size: 13px; }
.kv-v{ overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* =========================
   Buttons / Inputs
   ========================= */
.btn{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .06s ease, background .12s ease;
}
.btn:hover{ background: rgba(255,255,255,.10); }
.btn:active{ transform: translateY(1px); }
.btn.btn-ghost{
  background: transparent;
}

.input, .select{
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  outline: none;
}
.filters{
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 220px;
}

/* =========================
   Timeline
   ========================= */
.timeline{
  margin: 14px 0 34px;
  display: grid;
  gap: 12px;
}
.tl-item{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
  align-items: start;
}
.tl-date{
  color: var(--muted);
  font-size: 13px;
  padding-top: 12px;
}
.tl-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.05);
  overflow: hidden;
  display: grid;
  grid-template-columns: 160px 1fr;
}
.tl-img img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.tl-content{ padding: 12px; }
.tl-title{ margin: 0 0 6px; font-size: 16px; }
.tl-meta{ color: var(--muted); font-size: 13px; }

.empty{
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  padding: 14px;
  color: var(--muted);
}

/* =========================
   Rules
   ========================= */
.rules{ display: grid; gap: 10px; }
.rule{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(255,255,255,.04);
}
.rule-title{ font-weight: 700; margin-bottom: 4px; }
.rule-text{ color: var(--muted); line-height: 1.6; }

/* =========================
   Footer / Toast
   ========================= */
.site-footer{
  border-top: 1px solid var(--border);
  background: rgba(10,14,22,.45);
  padding: 14px 0;
}
.footer-row{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted);
}
.footer-sep{ opacity: .6; }

.toast{
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: rgba(0,0,0,.65);
  border: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.92);
  padding: 10px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.toast.show{
  opacity: 1;
  transform: translateX(-50%) translateY(-2px);
}

/* =========================
   Responsive
   ========================= */
@media (max-width: 920px){
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; }
  .filters{ grid-template-columns: 1fr; }
  .tl-item{ grid-template-columns: 1fr; }
  .tl-card{ grid-template-columns: 1fr; }
  .tl-date{ padding-top: 0; }
}

@media (max-width: 720px){
  .nav-toggle{ display: inline-block; }
  .site-nav{
    position: absolute;
    right: 20px;
    top: 62px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    border: 1px solid var(--border);
    background: rgba(10,14,22,.90);
    border-radius: 16px;
    box-shadow: var(--shadow);
  }
  .site-nav.is-open{ display: flex; }
}