/* ============================================================
   迹 · v2 — 现代响应式样式（站点索引）
   亮色 = 暖纸白 / 墨色；暗色 = 玄黑 / 宣纸白；强调色 = 朱砂
   ============================================================ */

:root {
  --bg: #faf8f4;
  --surface: #ffffff;
  --fg: #211d18;
  --muted: #837b70;
  --line: #e8e2d8;
  --accent: #b0524a;
  --accent-soft: rgba(176, 82, 74, .12);
  --shadow: 0 10px 30px rgba(33, 29, 24, .10);
  --shadow-lift: 0 18px 44px rgba(33, 29, 24, .16);
  --radius: 14px;
  --radius-s: 9px;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --maxw: 1160px;
}

[data-theme="dark"] {
  --bg: #111013;
  --surface: #1a191d;
  --fg: #eae5dc;
  --muted: #97918a;
  --line: #2a2823;
  --accent: #cf7f6f;
  --accent-soft: rgba(207, 127, 111, .14);
  --shadow: 0 10px 30px rgba(0, 0, 0, .45);
  --shadow-lift: 0 18px 44px rgba(0, 0, 0, .55);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* 锚点跳转时给固定顶栏留出空间，避免跳到的目标被顶栏盖住 */
  scroll-padding-top: 84px;
  /* 始终预留滚动条槽位：筛选卡片导致内容变矮时，页面不再左右跳一下 */
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background .35s ease, color .35s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: #fff; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 14px;
  border-radius: 0 0 8px 0; z-index: 99;
}
.skip:focus { left: 0; }

.dot { color: var(--accent); margin: 0 .45em; font-weight: 700; }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(18px, 5vw, 48px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--serif);
  font-size: 30px; font-weight: 700; line-height: 1;
  letter-spacing: .05em;
}
.brand-dot {
  display: inline-block; width: 7px; height: 7px; margin-left: 3px;
  background: var(--accent); border-radius: 50%;
}

.topnav { display: flex; align-items: center; gap: clamp(14px, 3vw, 26px); }
.topnav a { font-size: 15px; color: var(--muted); transition: color .2s; }
.topnav a:hover { color: var(--fg); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border: 1px solid var(--line);
  border-radius: 50%; background: var(--surface); color: var(--fg);
  cursor: pointer; transition: transform .2s, border-color .2s;
}
.icon-btn:hover { transform: scale(1.08); border-color: var(--accent); }

[data-theme="light"] .i-moon { display: none; }
[data-theme="dark"] .i-sun { display: none; }

/* ---------- 首页 Hero ---------- */

.hero {
  min-height: calc(72vh - 70px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 8vh 20px 6vh;
  position: relative;
}

.hero-avatar {
  width: clamp(64px, 9vw, 88px); height: auto;
  border-radius: 50%; border: 1px solid var(--line);
  box-shadow: var(--shadow); margin-bottom: 22px;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(88px, 20vw, 190px);
  font-weight: 700; line-height: 1; margin: 0;
  letter-spacing: .04em;
}

.hero-quote {
  margin: 26px 0 0; font-size: clamp(15px, 2.2vw, 18px);
  color: var(--muted); letter-spacing: .18em;
}

.hero-meta {
  margin: 14px 0 0; font-size: 13.5px; color: var(--muted);
  letter-spacing: .06em;
}

.hero-note {
  margin: 8px 0 0; font-size: 12.5px; color: var(--muted);
  letter-spacing: .04em; opacity: .85;
}

.hero-scroll {
  position: absolute; bottom: 2vh; left: 50%; width: 1px; height: 42px;
  background: linear-gradient(var(--accent), transparent);
  animation: drip 2.2s ease-in-out infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: top; }
  56% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 站点卡片网格 ---------- */

.grid {
  max-width: var(--maxw); margin: 0 auto;
  padding: 20px clamp(18px, 5vw, 48px) 70px;
  display: grid; gap: clamp(16px, 2.6vw, 26px);
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.card {
  display: flex;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .35s cubic-bezier(.2, .7, .3, 1), box-shadow .35s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
}

.card-body { padding: 16px 18px 18px; width: 100%; }
.card-name {
  margin: 0; font-family: var(--serif);
  font-size: 19px; font-weight: 700; letter-spacing: .04em;
  word-break: break-word;
}
.card:hover .card-name { color: var(--accent); }
.card-desc {
  margin: 8px 0 0; font-size: 13px; color: var(--muted);
  line-height: 1.65;
}
.card-meta {
  margin: 12px 0 0; font-size: 12.5px; color: var(--muted);
  word-break: break-all;
}

.demo-card {
  display: flex; align-items: center; justify-content: center;
  min-height: 120px; cursor: default;
}
.demo-card:hover { transform: none; box-shadow: var(--shadow); }
.demo-card .card-name { font-size: 17px; letter-spacing: .12em; }

/* ---------- 页脚 ---------- */

.footer {
  border-top: 1px solid var(--line);
  text-align: center; padding: 44px 20px 54px; color: var(--muted);
}
.footer-quote { font-family: var(--serif); letter-spacing: .2em; margin: 0; font-size: 15px; }
.footer-quote small { display: block; margin-top: 6px; font-size: 12px; letter-spacing: .1em; }
.footer-copy { margin: 14px 0 0; font-size: 12px; }

/* ---------- 进场动画（JS 可用时才隐藏初始态） ---------- */

.js .reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity .65s ease, transform .65s cubic-bezier(.2, .7, .3, 1);
}
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll { animation: none; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* ---------- 小屏适配 ---------- */

@media (max-width: 640px) {
  .topbar { padding: 12px 16px; }
  .hero { min-height: calc(62vh - 60px); }
  .grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .card { border-radius: var(--radius-s); }
  .card-body { padding: 13px 14px 15px; }
  .card-name { font-size: 16px; }
  .card-desc { font-size: 12px; }
}


/* ---------- 顶栏右侧 / 分类筛选 ---------- */

.topbar-right { display: flex; align-items: center; gap: 12px; min-width: 0; }

.filters {
  display: flex; align-items: center; gap: 6px;
  overflow-x: auto; max-width: 100%;
  scroll-behavior: smooth;
  /* 横向滑到尽头不要触发浏览器/页面的滚动链 */
  overscroll-behavior-x: contain;
  scrollbar-width: none; -ms-overflow-style: none;
}
.filters::-webkit-scrollbar { display: none; }

.chip {
  flex: 0 0 auto;
  font: inherit; font-size: 13.5px; line-height: 1;
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--muted); cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.chip:hover { color: var(--fg); border-color: var(--accent); }
.chip.is-active {
  color: #fff; background: var(--accent); border-color: var(--accent);
}

.card.hide { display: none; }

@media (max-width: 720px) {
  .topbar { flex-wrap: nowrap; gap: 10px; }
  .topbar-right { flex: 1 1 auto; justify-content: flex-end; }
  .filters { mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%); }
  .chip { font-size: 12.5px; padding: 7px 12px; }
}

/* ---------- 语言切换 ---------- */

.lang-btn {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px; padding: 0 11px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); color: var(--fg);
  font: inherit; font-size: 12.5px; font-weight: 600; letter-spacing: .08em;
  cursor: pointer;
  transition: transform .2s, border-color .2s, color .2s;
}
.lang-btn:hover { transform: scale(1.06); border-color: var(--accent); color: var(--accent); }

/* 切换时文案先淡出、替换后再淡入，避免字形生硬跳变 */
[data-en] { transition: opacity .15s ease; }
html.is-switching [data-en] { opacity: .25; }

/* ---------- 英文模式：字体与字距回归拉丁排版 ---------- */

[data-lang="en"] body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
[data-lang="en"] .brand,
[data-lang="en"] .hero-title,
[data-lang="en"] .card-name,
[data-lang="en"] .footer-quote {
  font-family: Georgia, "Times New Roman", "Noto Serif", serif;
}
[data-lang="en"] .brand { font-size: 26px; }
[data-lang="en"] .hero-title { font-size: clamp(46px, 10vw, 96px); letter-spacing: .01em; }
[data-lang="en"] .hero-quote,
[data-lang="en"] .footer-quote { letter-spacing: .02em; }
[data-lang="en"] .card-name { letter-spacing: .01em; }

/* ---------- 内页首屏：不必占满一屏 ---------- */

.hero.is-compact { min-height: 0; padding: 7vh 20px 2vh; }
.hero.is-compact .hero-title { font-size: clamp(60px, 13vw, 132px); }
.hero.is-compact .hero-scroll { display: none; }

/* ---------- 数据表（汇率 / 端口速查） ---------- */

.table-wrap {
  max-width: var(--maxw); margin: 0 auto;
  padding: 10px clamp(18px, 5vw, 48px) 40px;
  overflow-x: auto;
}

table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th, table.data td {
  padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left;
}
table.data th {
  color: var(--muted); font-weight: 600; letter-spacing: .06em; white-space: nowrap;
}
table.data td { color: var(--fg); }
table.data tbody tr { transition: background .2s; }
table.data tbody tr:hover { background: var(--accent-soft); }
table.data .num { font-variant-numeric: tabular-nums; text-align: right; }
table.data code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px; color: var(--accent);
}

/* ---------- 页脚站内导航 ---------- */

.footer-nav {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px 20px; margin: 18px 0 0; font-size: 13px; letter-spacing: .04em;
}
.footer-nav a {
  color: var(--muted); border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.footer-nav a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- 滚动条：细窄圆角，跟随主题变色 ---------- */

html {
  --sb-size: 12px;
  --sb-thumb: color-mix(in srgb, var(--muted) 38%, transparent);
  --sb-thumb-hover: color-mix(in srgb, var(--accent) 88%, transparent);
}

/* Chromium / Safari：自绘滑块，轨道透明，视觉上比系统默认细一半 */
::-webkit-scrollbar { width: var(--sb-size); height: var(--sb-size); }
::-webkit-scrollbar-track,
::-webkit-scrollbar-corner { background: transparent; }
::-webkit-scrollbar-thumb {
  border: 3px solid transparent;      /* 内缩出悬浮感 */
  border-radius: 999px;
  background: var(--sb-thumb);
  background-clip: content-box;
  transition: background-color .2s ease;
}
::-webkit-scrollbar-thumb:hover { background: var(--sb-thumb-hover); background-clip: content-box; }
::-webkit-scrollbar-thumb:active { background: var(--accent); background-clip: content-box; }

/* Firefox 没有 ::-webkit-scrollbar，用标准属性做细条 + 主题色。
   这条必须放在 @supports 里：一旦在 Chromium 设了 scrollbar-width/color，
   上面的自绘样式就会整体失效。 */
@supports not selector(::-webkit-scrollbar) {
  html, .table-wrap, #viewer-scroll {
    scrollbar-width: thin;
    scrollbar-color: var(--sb-thumb) transparent;
  }
}

/* 内层滚动区：平滑滚动，且不把滚动链传给页面 */
.table-wrap, #viewer-scroll { scroll-behavior: smooth; }
#viewer-scroll { scrollbar-gutter: stable; }