/* ============================================================
   365看台 · 共享样式 /assets/site.css
   夜间看台档案馆：深墨绿基底 + 细线精密网格 + 荧光橙焦点
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #061B17;
}

body,
h1, h2, h3, h4, h5, p,
ul, ol, figure, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --ink: #08251F;
  --ink-deep: #061B17;
  --panel: #0F3A31;
  --panel-soft: #0B2E27;
  --concrete: #8A938C;
  --silver: #C9CFC8;
  --orange: #FF6A1A;
  --orange-deep: #A63E0E;
  --paper: #E6D3A3;
  --blue: #2D7DFF;
  --mist: #F4F0E6;
  --charcoal: #111714;

  /* 线 */
  --line: rgba(201, 207, 200, 0.14);
  --line-mid: rgba(201, 207, 200, 0.26);
  --line-strong: rgba(201, 207, 200, 0.42);

  /* 尺寸 */
  --rail-w: 0px;
  --gutter: clamp(18px, 4vw, 56px);
  --gap: clamp(14px, 1.8vw, 28px);

  /* 字体 */
  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* 动效 */
  --dur: 160ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  margin: 0;
  padding-left: var(--rail-w);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5,
.display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1, .display { font-size: clamp(32px, 5.2vw, 64px); }
h2 { font-size: clamp(21px, 2.9vw, 34px); }
h3 { font-size: clamp(17px, 2vw, 22px); }
h4 { font-size: 16px; }

p { text-wrap: pretty; }

strong { font-weight: 700; color: var(--mist); }

::selection {
  background: var(--orange);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

#main-content { scroll-margin-top: 88px; }

/* ---------- 4. 通用工具 ---------- */
.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(34px, 5vw, 76px); }
.section--tight { padding-block: clamp(22px, 3vw, 42px); }

.grid { display: grid; gap: var(--gap); }
.grid > * { min-width: 0; }

.grid--2,
.grid--3,
.grid--4 { grid-template-columns: minmax(0, 1fr); }

@media (min-width: 680px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 920px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
  .grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
}

.stack { display: grid; gap: clamp(14px, 2vw, 26px); }

.stack--paper > .panel {
  box-shadow: 8px 8px 0 -1px var(--ink-deep), 8px 8px 0 0 var(--line);
}

@media (min-width: 920px) {
  .stack--offset > *:nth-child(even) { margin-left: clamp(0px, 3.5vw, 60px); }
  .stack--offset > *:nth-child(odd) { margin-right: clamp(0px, 2vw, 32px); }
}

.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(20px, 3vw, 34px);
  background: var(--line);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 文本组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
}

.lede {
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--silver);
}

.note {
  font-size: 12.5px;
  line-height: 1.78;
  color: var(--concrete);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- 6. 面板 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line-mid);
  box-shadow: inset 0 1px 0 rgba(244, 240, 230, 0.05);
  padding: clamp(20px, 3vw, 38px);
}

.panel--flush { padding: 0; }

.panel__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.panel__title {
  margin-bottom: 8px;
  font-size: clamp(19px, 2.2vw, 26px);
}

/* 进场淡入（仅 JS 可用时启用） */
.has-reveal [data-panel] {
  opacity: 0;
  transform: translateY(14px);
}

.has-reveal [data-panel].is-inview {
  opacity: 1;
  transform: none;
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 11px 20px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-align: center;
  transition: background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

.btn:hover {
  border-color: var(--orange);
  background: rgba(255, 106, 26, 0.1);
}

.btn--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #08251F;
}

.btn--accent:hover {
  background: var(--paper);
  border-color: var(--paper);
  color: #08251F;
}

.btn--ghost {
  border-color: var(--line-mid);
  color: var(--silver);
}

.btn--ghost:hover {
  color: var(--mist);
  border-color: var(--orange-deep);
  background: rgba(255, 106, 26, 0.06);
}

.btn--block { width: 100%; }

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.4;
  letter-spacing: 0.1em;
}

.tag--paper { color: var(--paper); }
.tag--orange { color: var(--orange); }
.tag--blue { color: var(--blue); }

/* ---------- 9. 面包屑 ---------- */
.crumbs { margin-block: clamp(18px, 3vw, 34px) 0; }

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.crumbs__item + .crumbs__item::before {
  content: "/";
  color: var(--line-strong);
}

.crumbs__link {
  color: var(--silver);
  transition: color var(--dur) var(--ease);
}

.crumbs__link:hover { color: var(--orange); }

.crumbs__current { color: var(--paper); }

/* ---------- 10. 图片容器 ---------- */
.figure {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background: var(--panel-soft);
  border: 1px solid var(--line-mid);
}

.figure__media {
  display: block;
  width: 100%;
  aspect-ratio: var(--figure-ratio, 4 / 3);
  object-fit: cover;
  object-position: center;
  background-color: var(--panel);
  background-image:
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 32px);
}

.figure__caption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.07em;
  color: var(--concrete);
}

/* ---------- 11. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--orange);
  color: #08251F;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 12. 头部 · 移动形态（默认） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "brand toggle"
    "nav nav"
    "foot foot";
  align-items: center;
  gap: 0 12px;
  padding: 12px var(--gutter);
  background: var(--ink);
  border-bottom: 1px solid var(--line-mid);
}

.rail-brand { grid-area: brand; min-width: 0; }

.rail-brand__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail-brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.rail-brand__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--concrete);
}

.rail-status {
  grid-area: status;
  display: none;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.rail-status__dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--orange);
}

.nav-toggle {
  grid-area: toggle;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 11px;
  border: 1px solid var(--line-mid);
  color: var(--silver);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--orange);
  color: var(--mist);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* 移动导航面板 */
.rail-nav {
  grid-area: nav;
  display: none;
  padding-top: 6px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

.site-header[data-open] .rail-nav { display: block; }

.rail-nav__list { display: grid; }

.rail-nav__item + .rail-nav__item { border-top: 1px solid var(--line); }

.rail-nav__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 12px 12px 12px;
  border-left: 2px solid transparent;
  color: var(--silver);
  font-size: 15px;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}

.rail-nav__link:hover,
.rail-nav__link:focus-visible {
  color: var(--mist);
  border-left-color: var(--orange-deep);
  background: rgba(255, 106, 26, 0.06);
}

.rail-nav__link[aria-current="page"] {
  color: var(--mist);
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 106, 26, 0.16), rgba(255, 106, 26, 0) 72%);
}

.rail-nav__link[aria-current="page"] .rail-nav__idx { color: var(--orange); }

.rail-nav__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.rail-nav__text { min-width: 0; }

.rail-foot {
  grid-area: foot;
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 14px 0 4px;
}

.site-header[data-open] .rail-foot { display: flex; }

.rail-foot__note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--concrete);
  text-align: center;
}

.rail-cta { width: 100%; }

/* 滚动进度刻度 */
.rail-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--paper));
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- 13. 头部 · 桌面轨道形态 ---------- */
@media (min-width: 900px) {
  :root { --rail-w: 240px; }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-w);
    height: 100vh;
    height: 100dvh;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto 1fr auto;
    grid-template-areas:
      "brand"
      "status"
      "nav"
      "foot";
    align-content: stretch;
    gap: 0;
    padding: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line-mid);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .rail-brand {
    padding: 24px 20px 18px;
    border-bottom: 1px solid var(--line);
  }

  .rail-brand__name { font-size: 24px; }

  .rail-status {
    display: flex;
    padding: 12px 20px;
    border-bottom: 1px solid var(--line);
  }

  .nav-toggle { display: none; }

  .rail-nav {
    display: block;
    grid-area: nav;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
    padding-block: 8px;
  }

  .rail-nav__link { padding: 11px 20px 11px 18px; }

  .rail-foot {
    display: flex;
    padding: 18px 20px 22px;
    border-top: 1px solid var(--line);
  }

  .rail-progress {
    left: auto;
    right: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
    transform: scaleY(var(--p, 0));
    transform-origin: 50% 0;
  }

  #main-content { scroll-margin-top: 24px; }
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 96px);
  background: var(--ink-deep);
  border-top: 1px solid var(--line-mid);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 48px);
  padding: clamp(34px, 5vw, 76px) var(--gutter) clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 96px 100%;
}

@media (min-width: 720px) {
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (min-width: 1080px) {
  .footer-top {
    grid-template-columns: minmax(0, 4fr) minmax(0, 2fr) minmax(0, 2fr) minmax(0, 4fr);
  }
  .footer-brand { grid-column: auto; }
  .footer-contact { grid-column: auto; }
}

.footer-brand__id { margin-bottom: 14px; }

.footer-brand__name {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.footer-brand__statement {
  margin-top: 14px;
  max-width: 38ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--concrete);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--concrete);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  flex: 0 0 auto;
  background: var(--orange);
}

.footer-col__list { display: grid; }

.footer-col__list li { border-bottom: 1px solid var(--line); }

.footer-link {
  position: relative;
  display: inline-block;
  padding: 7px 0;
  color: var(--silver);
  font-size: 14px;
  transition: color var(--dur) var(--ease);
}

.footer-link:hover { color: var(--mist); }

.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.footer-link:hover::after,
.footer-link:focus-visible::after { transform: scaleX(1); }

.footer-contact__list { display: grid; }

.footer-contact__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.footer-contact__row--wide .footer-contact__value {
  font-family: var(--font-body);
  font-size: 13.5px;
  letter-spacing: 0.01em;
}

.copy-btn {
  padding: 3px 7px;
  border: 1px solid rgba(230, 211, 163, 0.36);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--paper);
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.copy-btn:hover {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}

.copy-btn:active { transform: translateY(1px); }

.footer-contact__note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--orange-deep);
  font-size: 12px;
  line-height: 1.75;
  color: var(--concrete);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding: 16px var(--gutter) 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--concrete);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.footer-legal__link {
  color: var(--silver);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-legal__link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange-deep);
}

.footer-copy { margin-left: auto; }

.footer-icp { color: var(--concrete); }

/* ---------- 15. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .has-reveal [data-panel] {
    opacity: 1;
    transform: none;
  }
}