/* AI 信号台 —— 原创视觉：钴蓝指挥台 + 淡紫内容面 + 蓝图式细线网格。
   字体全部自托管，没有任何外部请求（不依赖任何 CDN）。 */

/* ── 字体 ─────────────────────────────────────────────────────
   拉丁文用 Montserrat（官方 Latin 子集可变字重 100–900，normal），
   中文交给系统里的 PingFang SC —— 所以字体栈里 Montserrat 永远排第一、
   PingFang SC 紧随其后：Montserrat 里没有的汉字会自然落到 PingFang SC。

   文件与许可：
     assets/fonts/montserrat-latin-variable.woff2   Montserrat v9.000 Latin 子集
     assets/fonts/OFL.txt                           SIL Open Font License 1.1
   来源：Google Fonts 官方分发的 Latin 子集 woff2（构建时随 site/ 一起复制进
   public/assets/fonts/，运行时只走同源相对路径，不请求 fonts.gstatic.com）。 */
@font-face {
  font-family: "Montserrat";
  font-style: normal;
  font-weight: 100 900;          /* 可变字重：一份文件覆盖 Thin–Black */
  font-display: swap;            /* 字体没到之前先用回退字形，正文绝不空白 */
  src: url("./fonts/montserrat-latin-variable.woff2") format("woff2");
  /* 只声明这份子集真正包含的码位；范围外的字符（汉字、↗ 等）直接落到下一档字体 */
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
                 U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --cobalt:       #1e2ed6;
  --cobalt-deep:  #101a73;
  --cobalt-ink:   #0a0f34;
  --ink:          #14162e;
  --ink-soft:     #4c4f70;
  --ink-faint:    #6f7292;

  --paper:        #fbfaff;
  --lav-50:       #f4f2fd;
  --lav-100:      #ece9f9;
  --lav-200:      #dfdbf4;

  --rule:         #cfcbec;
  --rule-strong:  #a49dd4;
  --rule-onblue:  rgba(255, 255, 255, .28);

  --warn:         #8a3d00;
  --warn-bg:      #fdf1e3;
  --warn-rule:    #e0b183;
  --ok:           #0e6a50;

  --focus:        #ffb020;

  /* 两条字体栈都是「Montserrat 先、PingFang SC 后」：拉丁字符命中 Montserrat，
     汉字落空后由 PingFang SC 接住，其余仅作为缺字体机器上的兜底。 */
  --sans: "Montserrat", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
          "Noto Sans CJK SC", "Microsoft YaHei", ui-sans-serif, system-ui,
          -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "Montserrat", "PingFang SC", ui-monospace, SFMono-Regular, "SF Mono",
          Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --shell: 1140px;
  --r: 3px;              /* 极小圆角：保持工程图纸的硬边感 */
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; line-height: 1.18; letter-spacing: -.015em; font-weight: 700; }
p { margin: 0; }
ol, ul, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }

a { color: var(--cobalt); text-underline-offset: 3px; }
a:hover { color: var(--cobalt-deep); }

button, select, input { font: inherit; color: inherit; }

kbd {
  font-family: var(--mono);
  font-size: .74em;
  font-weight: 600;
  letter-spacing: .04em;
  border: 1px solid currentColor;
  border-radius: var(--r);
  padding: 0 .34em;
  line-height: 1.45;
  display: inline-block;
  opacity: .85;
}

.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 24px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* 可见的键盘焦点：全站统一，绝不隐藏 */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--r);
}

.skip-link {
  position: absolute; left: 8px; top: -60px; z-index: 60;
  background: var(--cobalt-deep); color: #fff;
  padding: 10px 16px; border-radius: var(--r);
  font-family: var(--mono); font-size: 13px; text-decoration: none;
  transition: top .12s ease-out;
}
.skip-link:focus { top: 8px; color: #fff; }

/* ── 顶栏 ─────────────────────────────────────────────────── */
.masthead {
  position: sticky; top: 0; z-index: 40;
  background: var(--cobalt-ink);
  border-bottom: 1px solid var(--cobalt-deep);
}
.masthead__inner {
  display: flex; align-items: center; gap: 20px;
  min-height: 56px; flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; }
.brand__mark { display: grid; grid-template-columns: repeat(3, 4px); gap: 2px; }
.brand__mark span {
  display: block; width: 4px; height: 14px; background: #fff; opacity: .35;
}
.brand__mark span:nth-child(2) { opacity: .65; height: 18px; align-self: end; }
.brand__mark span:nth-child(3) { opacity: 1; height: 10px; align-self: end; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__text b { font-size: 15px; letter-spacing: .01em; }
.brand__text em {
  font-family: var(--mono); font-style: normal;
  font-size: 9.5px; letter-spacing: .16em; opacity: .6;
}

.masthead__nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.page-signature {
  margin: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: #fff;
  white-space: nowrap;
}

.key-link {
  display: inline-flex; align-items: center; gap: 7px;
  background: transparent; border: 1px solid transparent;
  color: rgba(255, 255, 255, .78);
  padding: 5px 10px; border-radius: var(--r);
  font-size: 13px; cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.key-link:hover { background: rgba(255, 255, 255, .09); color: #fff; border-color: var(--rule-onblue); }
.key-link kbd { opacity: .62; }
.key-link--ghost { color: rgba(255, 255, 255, .5); }

/* ── 指挥台 hero ──────────────────────────────────────────── */
.deck {
  position: relative; overflow: hidden;
  background: var(--cobalt-deep);
  color: #fff;
  border-bottom: 1px solid var(--cobalt-ink);
}
/* 蓝图网格：纯 CSS，无图片资源 */
.deck__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
  pointer-events: none;
}
.deck__inner { position: relative; padding: 62px 24px 54px; }

.deck__eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .13em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .74);
  border: 1px dashed var(--rule-onblue);
  padding: 5px 12px; border-radius: var(--r);
}
.tick {
  width: 7px; height: 7px; border-radius: 50%;
  background: #7ce0bd; box-shadow: 0 0 0 3px rgba(124, 224, 189, .2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }

.deck__title {
  margin: 22px 0 0;
  font-size: clamp(34px, 6.2vw, 62px);
  letter-spacing: -.035em;
  max-width: 17ch;
}
.deck__title-hl {
  background: linear-gradient(transparent 62%, rgba(255, 176, 32, .55) 62%);
  padding: 0 .06em;
}
.deck__keep { white-space: nowrap; }
.deck__lede {
  margin: 20px 0 0; max-width: 62ch;
  color: rgba(255, 255, 255, .8); font-size: 16.5px;
}

/* 终端式状态盘 */
.console {
  margin-top: 36px;
  border: 1px solid var(--rule-onblue);
  border-radius: var(--r);
  background: rgba(10, 15, 52, .55);
  max-width: 880px;
}
.console__bar {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px;
  border-bottom: 1px dashed var(--rule-onblue);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
  color: rgba(255, 255, 255, .62);
}
.console__dot {
  width: 8px; height: 8px; border-radius: 50%; background: #7ce0bd; flex: none;
}
.console__dot[data-state="warn"] { background: #f0a94c; }
.console__stamp { margin-left: auto; }

.console__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
}
.console__cell {
  padding: 14px 16px;
  border-right: 1px dashed var(--rule-onblue);
  border-top: 1px dashed transparent;
}
.console__cell:last-child { border-right: 0; }
.console__cell dt {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .13em;
  text-transform: uppercase; color: rgba(255, 255, 255, .55);
}
.console__cell dd {
  margin-top: 4px; font-size: 17px; font-weight: 600; letter-spacing: -.01em;
}
.console__cell dd small { font-size: 12px; font-weight: 400; opacity: .65; display: block; }

.console__warn {
  margin: 0; padding: 11px 16px;
  border-top: 1px dashed var(--rule-onblue);
  font-family: var(--mono); font-size: 12.5px;
  color: #ffd9a8;
}

/* ── 控制条 ───────────────────────────────────────────────── */
.controls {
  position: sticky; top: 56px; z-index: 30;
  background: var(--lav-100);
  border-bottom: 1px solid var(--rule);
}
.controls__inner { padding-top: 12px; padding-bottom: 12px; }
.controls__row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.controls__row--sub { margin-top: 10px; }

.filters { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink-soft);
  padding: 5px 11px; border-radius: var(--r);
  font-size: 13.5px; cursor: pointer; white-space: nowrap;
  transition: background .12s, color .12s, border-color .12s;
}
.chip:hover { border-color: var(--cobalt); color: var(--cobalt-deep); }
.chip__n { font-family: var(--mono); font-size: 11px; opacity: .6; }
.chip[aria-pressed="true"] {
  background: var(--cobalt); border-color: var(--cobalt); color: #fff;
}
.chip[aria-pressed="true"] .chip__n { opacity: .8; }

.search {
  display: flex; align-items: center; gap: 8px;
  flex: 1 1 260px; min-width: 220px;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r);
  padding: 0 10px;
}
.search:focus-within { border-color: var(--cobalt); box-shadow: 0 0 0 2px rgba(30, 46, 214, .14); }
.search__label { display: flex; color: var(--ink-faint); }
.search__input {
  flex: 1; border: 0; background: transparent; padding: 8px 0; min-width: 0;
}
.search__input:focus { outline: none; }
.search__input::-webkit-search-cancel-button { display: none; }
.search__clear {
  border: 0; background: transparent; cursor: pointer;
  color: var(--ink-faint); padding: 4px 2px; line-height: 1;
}
.search__clear:hover { color: var(--ink); }

.picker { display: flex; align-items: center; gap: 8px; }
.picker__label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-faint);
}
.picker__select {
  border: 1px solid var(--rule-strong); border-radius: var(--r);
  background: var(--paper); padding: 5px 8px; font-size: 13.5px; max-width: 300px;
}

.hint {
  font-family: var(--mono); font-size: 12px; color: var(--ink-faint);
  margin-left: auto;
}

.copy-btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: transparent; border: 1px dashed var(--rule-strong);
  color: var(--ink-soft); padding: 5px 11px; border-radius: var(--r);
  font-size: 13px; cursor: pointer;
}
.copy-btn:hover { border-style: solid; border-color: var(--cobalt); color: var(--cobalt-deep); }
.copy-btn[data-done="1"] { border-color: var(--ok); color: var(--ok); border-style: solid; }

/* ── 信号流 ───────────────────────────────────────────────── */
.feed { padding: 40px 0 56px; }
.feed:focus { outline: none; }

.feed__head { border-bottom: 2px solid var(--ink); padding-bottom: 12px; margin-bottom: 8px; }
.feed__title { font-size: clamp(20px, 3vw, 27px); letter-spacing: -.025em; }
.feed__sub {
  margin-top: 5px; font-family: var(--mono);
  font-size: 12px; color: var(--ink-faint); letter-spacing: .04em;
}

.group { margin-top: 34px; }
.group__head {
  display: flex; align-items: baseline; gap: 12px;
  border-bottom: 1px dashed var(--rule-strong); padding-bottom: 7px;
}
.group__label {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--cobalt-deep);
}
.group__n { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); margin-left: auto; }

/* 时间线连接线 */
.signals { margin-top: 4px; position: relative; }
.signal {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 0 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}
.signal:last-child { border-bottom: 0; }

.signal__rail { position: relative; }
.signal__rail::before {           /* 竖向连接线 */
  content: ""; position: absolute;
  left: 5px; top: 20px; bottom: -21px;
  border-left: 1px dashed var(--rule-strong);
}
.signal:last-child .signal__rail::before { display: none; }
.signal__node {
  position: absolute; left: 0; top: 6px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--cobalt);
}
.signal[data-cat="tech-news"] .signal__node { border-color: var(--ink-soft); }
.signal[data-cat="leaderboards"] .signal__node { border-color: var(--warn); }
.signal[data-cat="releases"] .signal__node { border-color: var(--ok); }
.signal__idx {
  position: absolute; left: 22px; top: 1px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-faint);
}

.signal__meta {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; letter-spacing: .05em;
  color: var(--ink-faint);
}
.tag {
  border: 1px solid var(--rule-strong); border-radius: var(--r);
  padding: 1px 6px; color: var(--ink-soft);
}
.tag--cat { border-color: var(--cobalt); color: var(--cobalt-deep); }
.tag--group { border-style: dashed; }
/* AIHOT 发现标记：刻意比分类标签更轻，读者一眼能看出「这条是 AIHOT 找到的」，
   但不会喧宾夺主 —— 它是发现来源，不是新的内容分类。 */
.tag--aihot {
  border-color: var(--ink-faint);
  color: var(--ink-soft);
  letter-spacing: .04em;
}
.srclink--aihot { color: var(--ink-soft); }

.signal__title {
  margin: 7px 0 0; font-size: 18px; letter-spacing: -.02em; line-height: 1.4;
}
.signal__title a { color: var(--ink); text-decoration: none; }
.signal__title a:hover { color: var(--cobalt); text-decoration: underline; }
.signal__title .handle { font-family: var(--mono); font-size: 16px; letter-spacing: -.01em; }

.signal__body {
  margin: 8px 0 0; color: var(--ink-soft); font-size: 15px; max-width: 76ch;
}
.signal__foot {
  margin-top: 11px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.srclink {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 12px;
  text-decoration: none; color: var(--cobalt);
  border-bottom: 1px solid transparent;
}
.srclink:hover { border-bottom-color: currentColor; }
.srclink::after { content: "↗"; font-size: 11px; }
.srcfrom { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); }

mark { background: rgba(255, 176, 32, .42); color: inherit; padding: 0 1px; }

/* 检索结果里的来源期次标记 */
.signal__from {
  font-family: var(--mono); font-size: 11px; color: var(--ink-faint);
}
.signal__from button {
  background: none; border: 0; padding: 0; cursor: pointer;
  font: inherit; color: var(--cobalt); text-decoration: underline;
}

/* ── 状态 ─────────────────────────────────────────────────── */
.state {
  border: 1px dashed var(--rule-strong); border-radius: var(--r);
  background: var(--lav-50);
  padding: 40px 24px; text-align: center; margin-top: 28px;
}
.state__mono {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  color: var(--ink-faint); text-transform: uppercase; margin-bottom: 8px;
}
.state--error { background: var(--warn-bg); border-color: var(--warn-rule); color: var(--warn); }
.state__actions { margin-top: 16px; }
.state__btn {
  border: 1px solid currentColor; background: transparent; color: inherit;
  padding: 6px 14px; border-radius: var(--r); cursor: pointer; font-size: 14px;
}

.notice {
  display: flex; gap: 10px; align-items: flex-start;
  border: 1px solid var(--warn-rule); background: var(--warn-bg);
  border-left-width: 3px;
  color: var(--warn); border-radius: var(--r);
  padding: 11px 14px; margin-top: 20px;
  font-size: 14px;
}
.notice__mono { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; flex: none; padding-top: 2px; }

/* ── 说明 ─────────────────────────────────────────────────── */
.colophon { background: var(--lav-50); border-top: 1px solid var(--rule); padding: 52px 0; }
.colophon__inner { max-width: var(--shell); }
.colophon__title { font-size: clamp(19px, 2.6vw, 24px); letter-spacing: -.025em; }
.steps {
  display: grid; gap: 1px; margin-top: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  background: var(--rule); border: 1px solid var(--rule);
}
.step { background: var(--paper); padding: 20px 18px; }
.step__num {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--cobalt);
}
.step h3 { margin: 8px 0 6px; font-size: 16px; }
.step p { color: var(--ink-soft); font-size: 14.5px; }
.colophon__note {
  margin-top: 20px; font-size: 14px; color: var(--ink-faint);
  border-left: 2px dashed var(--rule-strong); padding-left: 12px; max-width: 72ch;
}

/* ── 页脚 ─────────────────────────────────────────────────── */
.foot { background: var(--cobalt-ink); color: rgba(255, 255, 255, .62); padding: 22px 0; }
.foot__inner { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.foot__mono, .foot__meta { font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; }
.foot__meta { margin-left: auto; }

/* ── 快捷键面板 ───────────────────────────────────────────── */
.sheet {
  position: fixed; inset: 0; z-index: 70;
  background: rgba(10, 15, 52, .55);
  display: grid; place-items: center; padding: 24px;
}
.sheet[hidden] { display: none; }
.sheet__panel {
  background: var(--paper); border: 1px solid var(--rule-strong); border-radius: var(--r);
  padding: 26px; width: min(420px, 100%);
}
.sheet__title { font-size: 18px; }
.sheet__list { margin-top: 16px; display: grid; gap: 9px; }
.sheet__list > div { display: flex; gap: 14px; align-items: baseline; }
.sheet__list dt { flex: none; width: 46px; }
.sheet__list dd { color: var(--ink-soft); font-size: 14.5px; }
.sheet__close {
  margin-top: 22px; width: 100%;
  border: 1px solid var(--rule-strong); background: transparent;
  padding: 8px; border-radius: var(--r); cursor: pointer;
}
.sheet__close:hover { border-color: var(--cobalt); color: var(--cobalt-deep); }

/* ── 响应式 ───────────────────────────────────────────────── */
@media (max-width: 860px) {
  .masthead__nav { order: 3; width: 100%; padding-bottom: 8px; }
  .page-signature { margin-left: auto; }
  .controls { position: static; }
  .hint { margin-left: 0; width: 100%; order: 3; }
  .copy-btn { margin-left: auto; }
}

@media (max-width: 620px) {
  .shell { padding: 0 16px; }
  .deck__inner { padding: 40px 16px 36px; }
  .console__cell { border-right: 0; border-bottom: 1px dashed var(--rule-onblue); }
  .signal { grid-template-columns: 26px minmax(0, 1fr); gap: 0 12px; }
  .signal__idx { display: none; }
  .picker__select { max-width: 100%; flex: 1; }
  .picker { width: 100%; }
}

/* ── 降低动效 ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .tick { animation: none; }
}

/* ── Barry RS 首页标识 ─────────────────────────────────────── */
/* Barry RS 首页标识：48px 方块，蓝底 + 1px 白色内描边，点击回主站首页 */
.barry-rs-home { display:inline-flex; flex-direction:column; align-items:center; justify-content:center;
  width:48px; height:48px; flex:none; background:#1B34E8; color:#fff; text-decoration:none;
  box-shadow:inset 0 0 0 1px #fff; line-height:1; border-radius:2px;
  -webkit-print-color-adjust:exact; print-color-adjust:exact; }
.barry-rs-home:hover { box-shadow:inset 0 0 0 2px #fff; }
.barry-rs-home .brs-top { font-size:8px; font-weight:600; letter-spacing:0.12em; text-indent:0.12em; }
.barry-rs-home .brs-bot { font-size:18px; font-weight:800; letter-spacing:0.04em; margin-top:3px; }
.masthead__inner .barry-rs-home { margin-block: 4px; }
@media print { .barry-rs-home { box-shadow: inset 0 0 0 1px #fff; } }