/* ============================================================
   谈球吧账号 · /assets/site.css
   共享外壳：深夜数据指挥室 / 左侧轨道 + 右侧观测窗
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --ink-deep: #0B1424;
  --ink-panel: #111F35;
  --ink-deepest: #070E1A;
  --paper: #F3E9D6;
  --paper-ink: #241E1A;
  --cyan: #35E0D0;
  --orange: #FF7A2F;
  --lime: #6EF27A;
  --alert: #FF4D5E;
  --rule: #2C3B52;
  --mist: #8FA3BF;

  --rail: 300px;
  --wrap: 1120px;
  --wrap-wide: 1300px;
  --wrap-narrow: 780px;

  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 26px;

  --head-h: 64px;
  --ease: cubic-bezier(.22, .8, .3, 1);

  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-head: "Arial Narrow", "Helvetica Neue Condensed", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--ink-deep);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(44, 59, 82, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 59, 82, .38) 1px, transparent 1px);
  background-size: 76px 76px, 76px 76px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 22% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse 90% 70% at 22% 0%, #000 0%, transparent 74%);
  opacity: .55;
}

h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 3. 排版阶梯 44 / 30 / 22 / 17 ---------- */
.t-display {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 44px);
  line-height: 1.06;
  letter-spacing: -.02em;
}
.t-xl {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 30px);
  line-height: 1.18;
  letter-spacing: -.02em;
}
.t-lg {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.32;
  letter-spacing: -.01em;
}
.t-md { font-size: 17px; font-weight: 700; line-height: 1.6; }
.t-small { font-size: 13px; line-height: 1.75; color: var(--mist); }
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
.prose { max-width: 36em; }
.prose p { line-height: 1.8; }
.prose p + p { margin-top: 1.05em; }

.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.paper .kicker { color: #A1522A; }

/* ---------- 4. 页面容器 ---------- */
.page {
  position: relative;
  z-index: 1;
  padding-bottom: 8px;
}
.wrap { width: min(100% - 40px, var(--wrap)); margin-inline: auto; }
.wrap-wide { width: min(100% - 40px, var(--wrap-wide)); margin-inline: auto; }
.wrap-narrow { width: min(100% - 40px, var(--wrap-narrow)); margin-inline: auto; }
.stack > * + * { margin-top: 18px; }

/* ---------- 5. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .22s var(--ease), background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--orange);
  color: #1B0E05;
  animation: pulse-halo 3s ease-in-out infinite;
}
.btn-primary:hover { background: #FF9251; }

.btn-cyan { background: var(--cyan); color: var(--ink-deep); }
.btn-cyan:hover { background: #5AEFE2; }

.btn-ghost {
  background: rgba(53, 224, 208, .06);
  border-color: var(--rule);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

@keyframes pulse-halo {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 122, 47, .45); }
  50% { box-shadow: 0 0 0 11px rgba(255, 122, 47, 0); }
}

/* ---------- 6. 标签 / 卡片 / 纸面 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  line-height: 1.7;
}
.tag-live { color: var(--lime); }
.tag-warn { color: var(--alert); }
.tag-info { color: var(--cyan); }

.card {
  background: var(--ink-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  padding: 20px;
}

.paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: var(--radius-l);
  padding: clamp(22px, 3vw, 34px);
}
.paper h2, .paper h3, .paper h4 { color: var(--paper-ink); }
.paper a { color: #1B4F74; text-decoration: underline; text-underline-offset: 3px; }
.paper a:hover { color: #A1522A; }

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}
.crumbs li { display: flex; align-items: center; gap: 10px; }
.crumbs li + li::before { content: "/"; color: var(--rule); }
.crumbs a { color: var(--mist); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 8. 网格与区块头 ---------- */
.grid { display: grid; gap: 20px; }
@media (min-width: 680px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 960px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
}

/* ---------- 9. 图片容器（页面阶段放置占位图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  background-color: var(--ink-panel);
  background-image:
    linear-gradient(150deg, rgba(53, 224, 208, .12), transparent 44%),
    linear-gradient(330deg, rgba(255, 122, 47, .12), transparent 48%);
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(143, 163, 191, .3);
  border-radius: calc(var(--radius-m) - 10px);
  pointer-events: none;
}
.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 10. 数据表 ---------- */
.data-table {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.data-table th,
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
}
.data-table th {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}
.data-table td { color: var(--paper); }
.is-match { color: var(--lime); }
.is-diff { color: var(--alert); }

/* ---------- 11. 显现动效协议 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}
.js-ready [data-reveal] {
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.js-ready [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   12. 页头
   ============================================================ */
.site-head {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(17, 31, 53, .97);
  border-bottom: 1px solid var(--rule);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 200;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink-deep);
  font-size: 14px;
  font-weight: 800;
  transform: translate(-50%, -240%);
  transition: transform .24s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: 2px;
}

.head-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  min-height: var(--head-h);
}

.head-brand {
  flex: 1 1 auto;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}
.brand-glyph {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 9px;
  background: conic-gradient(from 140deg, var(--cyan), var(--orange), var(--cyan));
  box-shadow: inset 0 0 0 1px rgba(11, 20, 36, .6);
}
.brand-glyph::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--ink-deep);
}

.brand-tagline {
  display: none;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--mist);
}

/* --- 移动端开关 --- */
.nav-toggle {
  position: relative;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: none;
  padding: 9px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.site-head[data-open="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-head[data-open="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-head[data-open="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- 遮罩 --- */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 50;
  padding: 0;
  border: 0;
  background: rgba(4, 9, 18, .64);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  cursor: pointer;
  transition: opacity .3s var(--ease), visibility .3s var(--ease);
}
.site-head[data-open="true"] .nav-scrim { opacity: 1; visibility: visible; }

/* --- 导航 --- */
.nav-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.site-nav {
  position: fixed;
  top: var(--head-h);
  bottom: 0;
  left: 0;
  z-index: 70;
  width: min(84vw, 340px);
  padding: 20px 20px 34px;
  background: var(--ink-panel);
  border-right: 1px solid var(--rule);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  box-shadow: 22px 0 60px rgba(0, 0, 0, .5);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-104%);
  transition: transform .34s var(--ease);
}
.site-head[data-open="true"] .site-nav { transform: translateX(0); }
.site-nav::-webkit-scrollbar { width: 6px; }
.site-nav::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 3px; }

.nav-caption + .nav-list { margin-top: 14px; }
.nav-list {
  counter-reset: nav;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.nav-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--paper);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.nav-link::before {
  counter-increment: nav;
  content: counter(nav, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  transition: color .2s var(--ease);
}
.nav-link:hover {
  background: rgba(53, 224, 208, .1);
  border-color: rgba(53, 224, 208, .34);
  color: var(--cyan);
}
.nav-link:hover::before { color: var(--cyan); }
.nav-link[aria-current="page"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-deep);
}
.nav-link[aria-current="page"]::before { color: rgba(11, 20, 36, .66); }

/* --- 行动区 --- */
.head-actions { display: none; }
.head-hint {
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist);
}

/* --- 滚动进度 --- */
.head-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  overflow: hidden;
  pointer-events: none;
  background: rgba(44, 59, 82, .85);
}
.head-progress-fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(var(--progress, 0));
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

/* ---------- 13. 页头 · 桌面端轨道 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail); }

  .site-head {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail);
    display: flex;
    flex-direction: column;
    border-bottom: 0;
    border-right: 1px solid var(--rule);
    background: linear-gradient(190deg, #12203A 0%, var(--ink-panel) 42%, #0D1729 100%);
  }
  .site-head::after {
    content: "";
    position: absolute;
    top: 0;
    right: -1px;
    bottom: 0;
    width: 7px;
    pointer-events: none;
    background-image: repeating-linear-gradient(to bottom, var(--rule) 0 1px, transparent 1px 16px);
    opacity: .9;
  }

  .head-inner {
    flex: 1;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 30px 22px 26px;
    min-height: 0;
  }

  .head-brand {
    flex: none;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--rule);
  }
  .brand-tagline { display: block; }

  .nav-toggle { display: none; }
  .nav-scrim { display: none; }

  .site-nav {
    position: static;
    width: auto;
    margin-top: 22px;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
    transform: none;
    transition: none;
  }
  .nav-link { font-size: 15px; padding: 11px 12px; }

  .head-actions {
    display: block;
    margin-top: auto;
    padding-top: 26px;
    border-top: 1px solid var(--rule);
  }
  .head-hint { margin-bottom: 12px; }
  .head-cta { width: 100%; }

  .head-progress {
    left: auto;
    right: -1px;
    top: 0;
    bottom: 0;
    width: 3px;
    height: auto;
  }
  .head-progress-fill {
    transform: scaleY(var(--progress, 0));
    transform-origin: top center;
    background: linear-gradient(180deg, var(--cyan), var(--orange));
  }
}

/* ============================================================
   14. 页脚
   ============================================================ */
.site-foot {
  position: relative;
  z-index: 1;
  margin-top: 72px;
  background: var(--ink-deepest);
  border-top: 1px solid var(--rule);
}
.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 132px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding: 56px 0 36px;
  width: min(100% - 40px, var(--wrap-wide));
  margin-inline: auto;
}
@media (min-width: 700px) {
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1060px) {
  .foot-grid { grid-template-columns: 1.55fr 1fr 1fr 1fr 1.25fr; gap: 30px; }
}

.foot-brand .brand-mark { font-size: 18px; }
.foot-note {
  margin-top: 14px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
}
.foot-cta { margin-top: 20px; }

.foot-col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}
.foot-list { display: flex; flex-direction: column; gap: 11px; }
.foot-list a {
  font-size: 14px;
  color: #C6D3E5;
  transition: color .2s var(--ease);
}
.foot-list a:hover { color: var(--cyan); }
.foot-list--plain li {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #C6D3E5;
  word-break: break-word;
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  width: min(100% - 40px, var(--wrap-wide));
  margin-inline: auto;
  padding: 20px 0 30px;
  border-top: 1px solid var(--rule);
}
.foot-copy,
.foot-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ============================================================
   15. 降级与动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .btn-primary { animation: none; }
}

@media print {
  .site-head, .site-foot, .skip-link { display: none; }
  body { padding-left: 0; background: #fff; color: #000; }
}