/* ============ 主题变量 ============ */
:root, :root[data-theme="dark"] {
  --bg: #0b0e1a;
  --bg-2: #141a33;
  --bg-3: #1a1040;
  --text: #e8eaf6;
  --text-dim: #8b93b8;
  --accent: #7ef0c3;
  --accent-2: #4ea8ff;
  --card: rgba(255,255,255,.05);
  --card-border: rgba(255,255,255,.09);
  --glow: rgba(126,240,195,.45);
  --shadow: rgba(0,0,0,.5);
  --btn-text: #0b0e1a;
  color-scheme: dark;
}
:root[data-theme="light"] {
  /* 粉白紫 4:4:2 偏粉版 —— 浅粉底 + 粉紫强调 */
  --bg: #fff5fa;
  --bg-2: #ffe4f1;
  --bg-3: #f6e3ff;
  --text: #4a2a44;
  --text-dim: #b0739b;
  --accent: #ec68a8;
  --accent-2: #b968ec;
  --card: rgba(255,255,255,.78);
  --card-border: rgba(236,104,168,.22);
  --glow: rgba(236,104,168,.4);
  --shadow: rgba(220,140,190,.28);
  --btn-text: #ffffff;
  color-scheme: light;
}

/* ============ 基础 ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  transition: background .3s ease, color .3s ease;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 100; transition: width .1s linear;
}

/* ============ Hero ============ */
.hero {
  min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(126,240,195,.12), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(78,168,255,.10), transparent 70%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 60%, var(--bg-3) 100%);
  position: relative; overflow: hidden;
}
.hero-inner { max-width: 720px; padding: 2rem 1.5rem; position: relative; z-index: 1; }
.hero-eyebrow {
  display: inline-block; font-size: .8rem; letter-spacing: .35em;
  color: var(--accent); border: 1px solid var(--card-border);
  border-radius: 2rem; padding: .25rem 1rem; margin-bottom: 1.25rem;
  background: var(--card); backdrop-filter: blur(6px);
}
.hero-title {
  font-size: clamp(2.6rem, 8vw, 4.5rem); font-weight: 900;
  letter-spacing: .04em; text-shadow: 0 0 24px var(--glow);
  margin-bottom: .5rem;
}
.hero-sub { color: var(--text-dim); font-size: 1.05rem; margin-bottom: 2rem; }

/* shields 风格徽章 */
.hero-badges { display: flex; flex-wrap: wrap; gap: .6rem; justify-content: center; }
.badge {
  display: inline-flex; align-items: stretch;
  font-size: .8rem; line-height: 1.2;
  border-radius: 4px; overflow: hidden;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  box-shadow: 0 2px 8px var(--shadow);
  text-decoration: none;
  transition: transform .15s ease;
}
.badge:hover { text-decoration: none; transform: translateY(-1px); }
.badge-label { padding: .4rem .8rem; background: var(--accent); color: var(--btn-text); font-weight: 700; }
.badge-join .badge-label { padding-right: 1.4rem; }
.badge-status {
  background: var(--card); border: 1px solid var(--card-border);
  color: var(--text-dim); backdrop-filter: blur(6px);
}
.badge-status .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-dim); align-self: center; margin: 0 .55rem 0 .7rem;
  flex: none;
}
.badge-status.is-online .dot { background: #34d399; box-shadow: 0 0 8px rgba(52,211,153,.8); }
.badge-status.is-offline .dot { background: #f87171; }
.badge-status .badge-text { padding: .4rem .8rem .4rem 0; }

.hero-cta {
  display: inline-block; margin-top: 2.5rem; color: var(--text-dim);
  font-size: .95rem; transition: color .2s;
}
.hero-cta:hover { color: var(--accent); text-decoration: none; }

/* 亮色 Hero 光晕偏粉 */
[data-theme="light"] .hero {
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(236,104,168,.16), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(185,104,236,.13), transparent 70%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 60%, var(--bg-3) 100%);
}
[data-theme="light"] .hero-title { text-shadow: 0 0 28px rgba(236,104,168,.5); }
[data-theme="light"] .badge-status.is-online .dot { box-shadow: 0 0 8px rgba(52,211,153,.9); }

/* ============ 主布局：内容 + 大纲（右） ============ */
.layout {
  max-width: 1200px; margin: 0 auto; padding: 3rem 1.5rem 4rem;
  display: grid; grid-template-columns: minmax(0,1fr) 240px; gap: 3rem;
}
.section { margin-bottom: 4rem; scroll-margin-top: 1.5rem; }
.section h2 {
  font-size: 1.6rem; margin-bottom: 1rem; padding-bottom: .5rem;
  border-bottom: 1px solid var(--card-border);
}
.section-note { color: var(--text-dim); font-size: .9rem; margin-bottom: 1rem; }

.intro-fig { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.5rem 0; }
.intro-fig img { border-radius: 12px; border: 1px solid var(--card-border); }

/* ============ 主题切换按钮 ============ */
#theme-toggle {
  position: fixed; right: 1.2rem; bottom: 1.2rem;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--card-border); background: var(--card);
  color: var(--text); font-size: 1.2rem; cursor: pointer;
  backdrop-filter: blur(8px); z-index: 90;
  transition: transform .2s, box-shadow .2s;
}
#theme-toggle:hover { transform: scale(1.08); box-shadow: 0 0 16px var(--glow); }

/* ============ Toast ============ */
#toast {
  position: fixed; bottom: 5rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--accent); color: var(--btn-text);
  padding: .5rem 1.2rem; border-radius: 8px; font-size: .9rem; font-weight: 600;
  opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 110;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ 大纲 ============ */
.toc {
  position: sticky; top: 1.5rem; align-self: start;
  max-height: calc(100vh - 3rem); overflow-y: auto;
}
.toc-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .85rem; font-weight: 700; color: var(--text-dim);
  letter-spacing: .15em; margin-bottom: .75rem;
}
#toc-toggle {
  background: none; border: 1px solid var(--card-border); color: var(--text-dim);
  border-radius: 6px; width: 24px; height: 24px; cursor: pointer; font-size: .8rem;
}
#toc-nav a {
  display: block; padding: .3rem .75rem; font-size: .85rem;
  color: var(--text-dim); border-left: 2px solid var(--card-border);
}
#toc-nav a.active { color: var(--accent); border-left-color: var(--accent); }
#toc-nav a.toc-l2 { padding-left: 1.5rem; font-size: .8rem; opacity: .85; }
.toc.collapsed #toc-nav, .toc.collapsed .toc-head span { display: none; }
.toc.collapsed #toc-toggle { transform: rotate(180deg); }

/* ============ 表格 ============ */
.table-wrap {
  overflow-x: auto; border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card); backdrop-filter: blur(8px);
}
.server-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.server-table th {
  text-align: left; padding: .7rem 1rem; font-size: .78rem;
  letter-spacing: .08em; color: var(--text-dim);
  border-bottom: 1px solid var(--card-border); white-space: nowrap;
}
.server-table td { padding: .7rem 1rem; border-bottom: 1px solid var(--card-border); }
.server-table tr:last-child td { border-bottom: none; }
.server-table tbody tr:hover td { background: rgba(127,127,127,.06); }
.addr-cell { white-space: nowrap; }
.addr-cell code, .archive-table code { font-family: ui-monospace, Consolas, monospace; color: var(--accent); }
.copy-btn {
  margin-left: .4rem; background: none; border: 1px solid var(--card-border);
  border-radius: 6px; color: var(--text-dim); cursor: pointer;
  font-size: .8rem; padding: .05rem .4rem; transition: all .15s;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 10px var(--glow); }
.status-badge { font-size: .8rem; color: var(--text-dim); white-space: nowrap; }
.status-badge.online { color: #34d399; font-weight: 600; }
.status-badge.offline { color: #f87171; font-weight: 600; }

.archive-box {
  border: 1px solid var(--card-border); border-radius: 12px;
  background: var(--card); padding: 0 1.2rem;
}
.archive-box summary { cursor: pointer; padding: 1rem 0; font-weight: 600; color: var(--text-dim); }
.archive-box summary:hover { color: var(--accent); }
.archive-box[open] summary { border-bottom: 1px solid var(--card-border); margin-bottom: .8rem; }

/* ============ FAQ ============ */
.faq-sub { font-size: 1.15rem; margin: 2rem 0 .8rem; scroll-margin-top: 1.5rem; }
.faq-card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 12px; padding: 1.2rem 1.4rem; backdrop-filter: blur(8px);
}
.faq-list { list-style: none; }
.faq-list li { padding: .5rem 0; border-bottom: 1px dashed var(--card-border); }
.faq-list li:last-child { border-bottom: none; }
.faq-list b { color: var(--accent); }
ol.faq-list { counter-reset: step; }
ol.faq-list li { counter-increment: step; padding-left: 2rem; position: relative; }
ol.faq-list li::before {
  content: counter(step); position: absolute; left: 0; top: .55rem;
  width: 1.3rem; height: 1.3rem; border-radius: 50%;
  background: var(--accent); color: var(--btn-text);
  font-size: .75rem; font-weight: 700; display: flex;
  align-items: center; justify-content: center;
}

/* ============ 页脚 ============ */
.footer {
  border-top: 1px solid var(--card-border); padding: 2.5rem 1.5rem 3.5rem;
  text-align: center; color: var(--text-dim); font-size: .9rem;
  background: linear-gradient(180deg, transparent, var(--bg-2));
}
.footer-links { display: flex; justify-content: center; align-items: center; gap: 1.5rem; margin: 1rem 0; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--accent); text-decoration: none; }
.footer-fine { font-size: .78rem; opacity: .6; }
.egg-btn { font-weight: 900; opacity: .35; }

/* ============ 动效 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 1.5rem; }
  .toc {
    position: fixed; top: auto; bottom: 5rem; right: 1.2rem; z-index: 80;
    width: min(70vw, 260px); max-height: 55vh;
    background: var(--bg); border: 1px solid var(--card-border);
    border-radius: 12px; padding: .8rem 1rem;
    box-shadow: 0 8px 30px var(--shadow);
  }
  .toc.collapsed { width: auto; padding: .4rem .6rem; }
  .intro-fig { grid-template-columns: 1fr; }
}