/* ==========================================================================
   溪璐 Shiro · 基础样式与共享组件
   依赖 tokens.css。页面专属样式放 home.css / map.css / admin.css。
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg-0);
  background-image:
    radial-gradient(1200px 700px at 78% -8%, rgba(201, 167, 255, 0.16), transparent 60%),
    radial-gradient(900px 620px at 12% 4%, rgba(127, 227, 255, 0.10), transparent 62%),
    radial-gradient(1000px 800px at 50% 105%, rgba(185, 199, 255, 0.10), transparent 65%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 星尘噪点层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  background-image:
    radial-gradient(1.2px 1.2px at 12% 18%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 32% 68%, rgba(255, 255, 255, 0.38), transparent),
    radial-gradient(1.4px 1.4px at 58% 12%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1px 1px at 74% 46%, rgba(255, 255, 255, 0.32), transparent),
    radial-gradient(1.3px 1.3px at 88% 78%, rgba(255, 255, 255, 0.42), transparent),
    radial-gradient(1px 1px at 44% 88%, rgba(255, 255, 255, 0.30), transparent),
    radial-gradient(1.1px 1.1px at 8% 56%, rgba(255, 255, 255, 0.26), transparent);
  background-size: 100% 100%;
  opacity: 0.9;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
::selection { background: rgba(var(--accent-rgb), 0.35); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 布局 ---------- */
.container { width: min(100% - 2.5rem, var(--container)); margin-inline: auto; }
.container-wide { width: min(100% - 2rem, var(--container-wide)); margin-inline: auto; }
.section { position: relative; padding-block: clamp(64px, 9vw, 120px); }
.section--tight { padding-block: clamp(44px, 6vw, 76px); }
.stack { display: grid; gap: var(--sp-4); }
.grid { display: grid; gap: var(--sp-5); }
.grid-2 { display: grid; gap: var(--sp-5); grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid-3 { display: grid; gap: var(--sp-5); grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-4 { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); }
.row { display: flex; align-items: center; gap: var(--sp-3); flex-wrap: wrap; }
.between { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); flex-wrap: wrap; }

/* ---------- 标题与排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}

.display {
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  line-height: 1.06;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}
.h1 { font-family: var(--font-serif); font-size: var(--fs-h1); line-height: 1.15; font-weight: 700; margin: 0; }
.h2 { font-family: var(--font-serif); font-size: var(--fs-h2); line-height: 1.2; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
.h3 { font-size: var(--fs-h3); line-height: 1.35; font-weight: 650; margin: 0; }
.lead { font-size: clamp(1rem, 1.35vw, 1.1rem); color: var(--muted); max-width: 62ch; margin: 0; }
.lead strong { color: var(--text); font-weight: 600; }
.muted { color: var(--muted); }
.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }
.text-grad {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.section-head { display: grid; gap: var(--sp-3); max-width: 720px; margin-bottom: var(--sp-7); }

/* 章节间细分割线 */
.hr-line {
  height: 1px; border: 0; margin: 0;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-size: 0.94rem; font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur) var(--ease-out),
              background-color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  color: #0a0d18;
  background: linear-gradient(135deg, #ffffff, var(--accent) 55%, var(--accent-2));
  box-shadow: 0 10px 30px rgba(var(--accent-rgb), 0.28);
}
.btn-primary:hover { box-shadow: 0 14px 38px rgba(var(--accent-rgb), 0.42); }
.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--line-strong);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: var(--surface-hover); border-color: rgba(var(--accent-rgb), 0.55); }
.btn-sm { padding: 9px 18px; font-size: var(--fs-sm); }
.btn-icon { padding: 10px; border-radius: 50%; aspect-ratio: 1; }

/* ---------- 标签 / 状态 ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}
.chip--accent { color: var(--accent); border-color: rgba(var(--accent-rgb), 0.4); background: rgba(var(--accent-rgb), 0.10); }
.chip--live { color: #d8ffe4; border-color: rgba(74, 222, 128, 0.45); background: rgba(74, 222, 128, 0.12); }
.dot-live {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-online);
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
  animation: pulse-live 2.2s infinite;
}
@keyframes pulse-live {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--grad-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-5);
  backdrop-filter: blur(14px);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur), box-shadow var(--dur);
}
.card--hover:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--accent-rgb), 0.38);
  box-shadow: var(--shadow);
}
.card--glow::after {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(var(--accent-rgb), 0.5), transparent 42%, rgba(var(--accent-2-rgb), 0.4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.75;
}

/* ---------- 导航 ---------- */
.site-nav {
  position: fixed; inset: 0 0 auto 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background-color var(--dur), border-color var(--dur), backdrop-filter var(--dur);
  border-bottom: 1px solid transparent;
}
.site-nav[data-scrolled="true"] {
  background: rgba(6, 8, 16, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}
.site-nav__inner {
  width: min(100% - 2.5rem, var(--container-wide));
  margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-5);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 34px; height: 34px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #ffffff 0%, var(--accent) 38%, #5b6bb0 100%);
  box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.5), inset -4px -3px 10px rgba(0, 0, 0, 0.35);
}
.brand__mark svg { width: 20px; height: 20px; }
.brand__name { font-family: var(--font-serif); font-weight: 700; letter-spacing: 0.08em; font-size: 1.02rem; }
.brand__sub { font-family: var(--font-en); font-size: 0.62rem; letter-spacing: 0.32em; color: var(--muted-2); text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  color: var(--muted);
  transition: color var(--dur-fast), background-color var(--dur-fast);
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-link[aria-current="page"] { color: var(--text); background: var(--surface-strong); }
.nav-cta { display: flex; align-items: center; gap: 10px; }

.nav-toggle {
  display: none; width: 40px; height: 40px;
  border-radius: 12px; border: 1px solid var(--line);
  place-items: center;
}
.nav-toggle span {
  display: block; width: 16px; height: 1.5px; background: var(--text);
  position: relative;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1.5px; background: var(--text);
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

@media (max-width: 860px) {
  .nav-toggle { display: grid; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch;
    gap: 2px; padding: var(--sp-4);
    background: rgba(6, 8, 16, 0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0; pointer-events: none;
    transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
  }
  .nav-links[data-open="true"] { opacity: 1; transform: none; pointer-events: auto; }
  .nav-link { padding: 12px 14px; }
  .nav-cta .btn { display: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  border-top: 1px solid var(--line);
  padding-block: var(--sp-8) var(--sp-6);
  background: linear-gradient(180deg, transparent, rgba(var(--accent-rgb), 0.045));
}
.footer-grid { display: grid; gap: var(--sp-6); grid-template-columns: 1.6fr 1fr 1fr; }
.footer-title { font-size: var(--fs-xs); letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted-2); margin-bottom: var(--sp-3); }
.footer-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: var(--fs-sm); }
.footer-list a { color: var(--muted); transition: color var(--dur-fast); }
.footer-list a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: var(--sp-7); padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: var(--sp-4);
  flex-wrap: wrap; font-size: var(--fs-xs); color: var(--muted-2);
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- 滚动浮现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .dot-live { animation: none; }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 16px);
  z-index: var(--z-toast);
  padding: 12px 20px; border-radius: var(--radius-pill);
  background: rgba(12, 16, 30, 0.94);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  font-size: var(--fs-sm);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.toast[data-show="true"] { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 工具类 ---------- */
.center { text-align: center; }
.center > * { margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.nowrap { white-space: nowrap; }