/* ============================================================
   天博赛场 · 共享样式 /assets/site.css
   深夜战术室荧光数据屏 —— reset / 变量 / 排版 / 外壳 / 基础组件
   ============================================================ */

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

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

body {
  margin: 0;
  background-color: var(--c-deep);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.9;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure, blockquote { margin: 0; }

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --c-deep: #061A22;
  --c-panel: #0B2A33;
  --c-line: #103845;
  --c-stand: #1D5566;
  --c-cool: #2E7D8C;
  --c-accent: #4CF0A3;
  --c-warm: #FF9A3C;
  --c-ink: #E8F4F2;
  --c-muted: #9FB8BE;
  --c-accent-soft: rgba(76, 240, 163, 0.10);
  --c-warm-soft: rgba(255, 154, 60, 0.12);
  --c-cool-soft: rgba(46, 125, 140, 0.18);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Barlow Condensed", ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  /* 字号（8px 基线网格体系） */
  --fs-body: 1rem;
  --fs-h1: clamp(2.125rem, 5.2vw, 3.25rem);
  --fs-h2: clamp(1.6rem, 3.4vw, 2.25rem);
  --fs-h3: clamp(1.1rem, 1.7vw, 1.35rem);
  --fs-num: clamp(3rem, 8vw, 8.75rem);
  --fs-num-sm: clamp(2rem, 4vw, 3.25rem);
  --fs-data: 0.8125rem;

  /* 尺度 */
  --w-max: 1240px;
  --gutter: 20px;
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-12: 96px;

  --dur: 240ms;
  --ease: cubic-bezier(0.22, 0.7, 0.3, 1);
}

@media (min-width: 768px) {
  :root { --gutter: 32px; --fs-body: 1.0625rem; }
}

/* ---------- 3. 基础排版 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose { max-width: 72ch; }
.prose p + p { margin-top: 1.2em; }
.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin-top: 1.6em;
}
.prose h2 { font-size: var(--fs-h2); }
.prose h3 { font-size: var(--fs-h3); }
.prose ul,
.prose ol { margin-top: 0.8em; padding-left: 1.2em; }
.prose ul li { list-style: none; position: relative; padding-left: 0.9em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 8px;
  height: 1px;
  background: var(--c-accent);
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.35em; }
.prose strong { color: var(--c-ink); font-weight: 600; }

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h1);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--c-ink);
}
.section-title--sm { font-size: var(--fs-h2); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cool);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--fs-num);
  line-height: 0.9;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
}
.num--sm { font-size: var(--fs-num-sm); }
.num--accent { color: var(--c-accent); }
.num--warm { color: var(--c-warm); }

.data-label {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  letter-spacing: 0.08em;
  color: var(--c-muted);
  text-transform: uppercase;
}

.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;
}

/* ---------- 4. 布局工具 ---------- */
.grid {
  display: grid;
  gap: var(--sp-3);
  grid-template-columns: minmax(0, 1fr);
}

.rule {
  height: 1px;
  background: var(--c-line);
  border: 0;
  margin: 0;
}

.band {
  height: 3px;
  background: var(--c-line);
  position: relative;
  overflow: hidden;
}
.band::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--band-w, 22%);
  background: var(--c-accent);
}
.band--wide::before { --band-w: 48%; }
.band--full::before { --band-w: 100%; }
.band--warm::before { background: var(--c-warm); }

@media (min-width: 900px) {
  .grid--rail { grid-template-columns: 5fr 7fr; gap: var(--sp-6); }
  .grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-4); }
  .grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sp-3); }
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--c-accent);
  color: #04231A;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus {
  top: 12px;
  outline-offset: 2px;
}

/* ---------- 6. 刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-deep);
  border-bottom: 1px solid var(--c-line);
}

/* 6.1 状态条 */
.header-status {
  background: var(--c-panel);
  border-bottom: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}
.header-status__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
}
.header-status__pulse {
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--c-accent);
  animation: tb-pulse 2.8s ease-out infinite;
}
.header-status__text {
  flex: 1 1 auto;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--c-muted);
}
.header-status__meta {
  display: none;
  flex: none;
  color: var(--c-cool);
  letter-spacing: 0.14em;
}
@media (min-width: 768px) {
  .header-status__meta { display: inline; }
}

@keyframes tb-pulse {
  0% { box-shadow: 0 0 0 0 rgba(76, 240, 163, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(76, 240, 163, 0); }
  100% { box-shadow: 0 0 0 0 rgba(76, 240, 163, 0); }
}

/* 6.2 报头 */
.masthead { background: var(--c-deep); }

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 14px 0 12px;
}

.masthead__brand {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.masthead__mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  line-height: 1.1;
  letter-spacing: 0.14em;
  color: var(--c-ink);
  text-indent: 0.14em;
}
.masthead__mark-accent { color: var(--c-accent); }
.masthead__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--c-cool);
  white-space: nowrap;
}

/* 6.3 移动栏目开关 */
.nav-toggle {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid var(--c-line);
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--c-accent); color: var(--c-ink); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 14px;
  height: 10px;
}
.nav-toggle__bar {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child {
  transform: translateY(2.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

/* 6.4 栏目导航 */
.nav {
  border-top: 1px solid var(--c-line);
}

.nav__list {
  display: flex;
  flex-direction: column;
}

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

.nav__link {
  position: relative;
  display: block;
  padding: 14px 8px;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  transition: color var(--dur) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 8px;
  bottom: 10px;
  width: 24px;
  height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 280ms var(--ease);
}
.nav__link:hover,
.nav__link:focus-visible { color: var(--c-ink); }
.nav__link:hover::after,
.nav__link:focus-visible::after { transform: scaleX(1); }

.nav__link[aria-current="page"] { color: var(--c-accent); }
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-accent);
  opacity: 0.65;
}

/* 移动端折叠：默认收起，[data-open] 展开 */
.nav {
  max-height: 0;
  overflow: hidden;
  visibility: hidden;
  transition: max-height var(--dur) var(--ease), visibility 0s linear var(--dur);
}
.nav[data-open] {
  max-height: 640px;
  visibility: visible;
  transition: max-height var(--dur) var(--ease), visibility 0s linear 0s;
}

/* 桌面端：横向一字排开，竖线分隔 */
@media (min-width: 900px) {
  .nav-toggle { display: none; }

  .nav {
    max-height: none;
    overflow: visible;
    visibility: visible;
    border-top: 1px solid var(--c-line);
  }
  .nav__list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
  }
  .nav__item + .nav__item {
    border-top: 0;
    border-left: 1px solid var(--c-line);
  }
  .nav__link {
    padding: 13px 26px;
    font-size: 14px;
  }
  .nav__link::after {
    left: 26px;
    right: auto;
    width: calc(100% - 52px);
    bottom: 9px;
  }
}

/* 6.5 滚动进度条 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
  pointer-events: none;
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-warm));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--c-accent);
  background: transparent;
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.btn:hover { background: var(--c-accent); color: #04231A; }
.btn:active { transform: translateY(1px); }

.btn--solid {
  background: var(--c-accent);
  color: #04231A;
}
.btn--solid:hover {
  background: transparent;
  color: var(--c-accent);
}

.btn--warm {
  border-color: var(--c-warm);
  color: var(--c-warm);
}
.btn--warm:hover {
  background: var(--c-warm);
  color: #2A1400;
}

.btn--ghost {
  border-color: var(--c-line);
  color: var(--c-ink);
}
.btn--ghost:hover {
  border-color: var(--c-accent);
  background: transparent;
  color: var(--c-accent);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--c-cool);
}
.breadcrumb a { color: var(--c-muted); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb [aria-current="page"] { color: var(--c-ink); }

/* ---------- 9. 标签 / 卡片 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--c-cool);
  color: var(--c-cool);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.tag--accent { border-color: var(--c-accent); color: var(--c-accent); }
.tag--warm { border-color: var(--c-warm); color: var(--c-warm); }

.card {
  position: relative;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  padding: var(--sp-3);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.card--link { display: block; }
.card--link:hover { border-color: var(--c-accent); background: #0D3039; }

.card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h3);
  line-height: 1.35;
  color: var(--c-ink);
}
.card__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

/* ---------- 10. 图片容器（页面阶段放置占位） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background-color: var(--c-panel);
  background-image:
    linear-gradient(135deg, rgba(46, 125, 140, 0.22), rgba(6, 26, 34, 0.92));
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 12.5% 25%;
  opacity: 0.55;
  pointer-events: none;
  z-index: 1;
}
.media-frame > img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame--heat {
  background-image:
    radial-gradient(circle at 62% 38%, rgba(255, 154, 60, 0.42), transparent 42%),
    radial-gradient(circle at 30% 68%, rgba(76, 240, 163, 0.30), transparent 46%),
    linear-gradient(135deg, rgba(46, 125, 140, 0.26), rgba(6, 26, 34, 0.95));
}
.media-frame--heat::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  background: radial-gradient(circle at 62% 38%, rgba(255, 154, 60, 0.18), transparent 34%);
  animation: tb-breath 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes tb-breath {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--sp-12);
  background: var(--c-panel);
  border-top: 1px solid var(--c-line);
  font-size: 14px;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 160px;
  height: 2px;
  background: var(--c-accent);
}
.site-footer::after {
  content: "";
  position: absolute;
  top: 0; left: 160px;
  width: 48px;
  height: 2px;
  background: var(--c-warm);
}

.footer__inner { padding: 56px 0 32px; }

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
}
@media (min-width: 820px) {
  .footer__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.9fr);
    gap: var(--sp-8);
  }
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.6rem;
  letter-spacing: 0.12em;
  color: var(--c-ink);
  line-height: 1.2;
}
.footer__brandline {
  margin-top: 10px;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.8;
  max-width: 34ch;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4) var(--sp-3);
}
@media (min-width: 560px) {
  .footer__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.footer__coltitle {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cool);
}
.footer__links li + li { margin-top: 10px; }
.footer__links a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--c-ink);
  transition: color var(--dur) var(--ease);
}
.footer__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms var(--ease);
}
.footer__links a:hover { color: var(--c-accent); }
.footer__links a:hover::after { transform: scaleX(1); }
.footer__links a[aria-current="page"] { color: var(--c-accent); }
.footer__links a[aria-current="page"]::after { transform: scaleX(1); opacity: 0.6; }

.footer__contact {
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-line);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}
@media (min-width: 820px) {
  .footer__contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: var(--sp-3) var(--sp-8);
  }
}

.footer__contactline {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}
.footer__contactkey {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-cool);
}
.footer__phone {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--c-ink);
}
.footer__address {
  margin-top: 12px;
  max-width: 46ch;
  color: var(--c-muted);
  font-size: 13.5px;
  line-height: 1.8;
}
.footer__note {
  margin-top: 10px;
  max-width: 58ch;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.85;
}

.footer__legal {
  margin-top: var(--sp-6);
  padding-top: 20px;
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}
.footer__icp { color: var(--c-ink); }
.footer__copy { color: var(--c-muted); }
.footer__trustline {
  flex: 1 1 100%;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.01em;
  line-height: 1.8;
  color: var(--c-muted);
  opacity: 0.85;
}

/* 邮箱复制按钮 */
.copy-btn {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  padding: 10px 14px;
  border: 1px dashed var(--c-line);
  background: transparent;
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.copy-btn:hover {
  border-color: var(--c-accent);
  background: var(--c-accent-soft);
}
.copy-btn__label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}
.copy-btn__value { word-break: break-all; }
.copy-btn__hint {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-accent);
}
.copy-btn[data-copied] { border-color: var(--c-warm); }
.copy-btn[data-copied] .copy-btn__hint { color: var(--c-warm); }

/* ---------- 12. 进入视口显现 ---------- */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}
html[data-js="on"] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 动效降级 ---------- */
@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;
  }

  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .header-status__pulse { animation: none; box-shadow: 0 0 0 4px rgba(76, 240, 163, 0.22); }
  .media-frame--heat::after { animation: none; opacity: 0.7; }
}