/* ============================================================
   博鱼体育 · 共享样式表 /assets/site.css
   深海看台 + 数据转播舱：锐利直角、精密网格、深色数据面板
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}
img, svg, video { display: block; max-width: 100%; }
h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }

:root {
  --deep-900: #06182B;
  --deep-800: #0A2138;
  --deep-700: #10304E;
  --line: #1E4468;
  --line-soft: rgba(30, 68, 104, 0.55);
  --grid-line: rgba(30, 68, 104, 0.28);
  --ink: #E8F2F9;
  --mist: #A3BDD2;
  --coral: #FF6B4A;
  --cyan: #35E5D4;
  --gold: #F5B942;
  --slate: #5C7A93;

  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --header-h: 76px;
  --header-h-sm: 64px;
  --wrap: 1240px;
  --gutter: clamp(20px, 4.4vw, 56px);
  --ease: cubic-bezier(0.22, 0.7, 0.3, 1);
}

body {
  background-color: var(--deep-900);
  background-image:
    linear-gradient(to right, var(--grid-line) 0 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 0 1px, transparent 1px);
  background-size: 88px 88px;
  background-position: -1px -1px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  overflow-x: hidden;
}

/* ---------- 排版层级：只靠尺寸 / 颜色 / 字重 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 { font-size: clamp(34px, 5.2vw, 56px); }
h2 { font-size: clamp(28px, 3.6vw, 40px); }
h3 { font-size: clamp(21px, 2.4vw, 30px); }
h4 { font-size: 22px; }
p { max-width: 62ch; }

::selection { background: var(--coral); color: var(--deep-900); }

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

/* ---------- 基础容器与栅格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.main-content { padding-top: calc(var(--header-h) + 40px); }
.main-content--flush { padding-top: 0; }

.section {
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
}
.section:first-child { border-top: 0; }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(24px, 3vw, 40px);
  max-width: 840px;
}

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.aside-rail {
  border-left: 1px solid var(--line);
  padding-left: clamp(16px, 2vw, 28px);
}

.rule { height: 1px; background: var(--line); width: 100%; }

/* ---------- 索引元素 ---------- */
.eyebrow,
.chapter-no,
.meta,
.num,
.index-no,
.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.chapter-no {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--coral);
}
.chapter-no--cyan { color: var(--cyan); }
.chapter-no--gold { color: var(--gold); }

.chapter-big {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--coral);
}

.meta {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.lede {
  font-size: 19px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1;
  border: 1px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn--coral {
  background: var(--coral);
  border-color: var(--coral);
  color: #08161F;
}
.btn--coral:hover { background: #FF8365; border-color: #FF8365; }
.btn--coral:active { transform: translateY(1px); }

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

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

/* ---------- 页面头部：跳过链接 + 转播条 + 叠加导航 ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -80px;
  z-index: 140;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--deep-900);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
              box-shadow 0.35s var(--ease);
}
.site-header[data-scrolled] {
  background: rgba(6, 24, 43, 0.95);
  border-bottom-color: var(--line);
  box-shadow: 0 22px 44px rgba(2, 10, 20, 0.55);
  backdrop-filter: blur(10px);
}
.site-header[data-nav-open] {
  background: var(--deep-900);
  border-bottom-color: var(--line);
}

.header-rail {
  max-height: 40px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(16, 48, 78, 0.75), rgba(6, 24, 43, 0));
  transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease);
}
.site-header[data-scrolled] .header-rail,
.site-header[data-nav-open] .header-rail {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}
.rail-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 36px;
}
.rail-dot {
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--cyan);
}
.rail-text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.rail-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
  white-space: nowrap;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 36px);
  height: var(--header-h);
  transition: height 0.35s var(--ease);
}
.site-header[data-scrolled] .header-inner { height: var(--header-h-sm); }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}
.brand-mark {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--coral);
  background: rgba(255, 107, 74, 0.1);
  color: var(--coral);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
}
.brand-mark::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 11px;
  height: 3px;
  background: var(--cyan);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.primary-nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.7vw, 26px);
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease), background 0.2s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--ink); font-weight: 600; }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyan);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--deep-800);
  transition: border-color 0.2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: background 0.2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), top 0.25s var(--ease);
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }
.nav-toggle-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.scroll-meter-fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--coral), var(--cyan));
}

/* ---------- 内容组件 ---------- */
.card {
  background: var(--deep-800);
  border: 1px solid var(--line);
  padding: clamp(20px, 2.6vw, 32px);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.card:hover { border-color: var(--cyan); background: var(--deep-700); }
.card--accent { border-left: 3px solid var(--coral); }
.card--gold { border-left: 3px solid var(--gold); }

.stat-card {
  background: var(--deep-800);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  padding: 22px;
}
.stat-value {
  display: block;
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.stat-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.data-table {
  font-size: 15px;
  background: var(--deep-800);
  border: 1px solid var(--line);
}
.data-table caption {
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}
.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}
.data-table thead th {
  background: var(--deep-700);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--mist);
  white-space: nowrap;
}
.data-table tbody tr:nth-child(even) { background: rgba(16, 48, 78, 0.45); }
.data-table tbody tr { transition: background 0.18s var(--ease), box-shadow 0.18s var(--ease); }
.data-table tbody tr:hover {
  background: rgba(53, 229, 212, 0.08);
  box-shadow: inset 0 0 0 1px var(--cyan);
}
.data-table .num,
.data-table td.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.data-table th[data-sort] { cursor: pointer; user-select: none; }
.data-table th[data-sort]:hover { color: var(--ink); }
.data-table th[data-sort][aria-sort="ascending"]::after {
  content: "▲";
  margin-left: 8px;
  font-size: 9px;
  color: var(--cyan);
}
.data-table th[data-sort][aria-sort="descending"]::after {
  content: "▼";
  margin-left: 8px;
  font-size: 9px;
  color: var(--cyan);
}

.index-list { border-top: 1px solid var(--line); }
.index-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: padding-left 0.22s var(--ease), border-color 0.22s var(--ease);
}
.index-item:hover { padding-left: 10px; border-color: var(--cyan); }
.index-no {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--coral);
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--deep-700);
  border: 1px solid var(--line);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30, 68, 104, 0.35) 0 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 68, 104, 0.35) 0 1px, transparent 1px);
  background-size: 25% 25%;
  opacity: 0.7;
}
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-caption {
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.note {
  padding: 16px 20px;
  border-left: 2px solid var(--cyan);
  background: rgba(53, 229, 212, 0.06);
  font-size: 15px;
  color: var(--mist);
}
.note--gold {
  border-left-color: var(--gold);
  background: rgba(245, 185, 66, 0.08);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.tag--coral { border-color: rgba(255, 107, 74, 0.6); color: var(--coral); }
.tag--cyan { border-color: rgba(53, 229, 212, 0.6); color: var(--cyan); }
.tag--gold { border-color: rgba(245, 185, 66, 0.65); color: var(--gold); }

.breadcrumb {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}
.breadcrumb-item[aria-current="page"] { color: var(--mist); }

/* ---------- 滚动显现协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}
.no-motion [data-reveal] {
  opacity: 1;
  transform: none;
  transition: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--deep-800);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(320px, 46%);
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--cyan) 62%, transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(40px, 5vw, 72px) 0;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.footer-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.footer-mark::before {
  content: "";
  width: 14px;
  height: 14px;
  background: var(--coral);
  box-shadow: 6px 6px 0 -2px var(--cyan);
}
.footer-copy {
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 34ch;
}
.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 40ch;
}
.footer-col {
  display: flex;
  flex-direction: column;
}
.footer-col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--coral);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 15px;
  color: var(--mist);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.footer-links a:hover {
  color: var(--ink);
  padding-left: 8px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-left: clamp(16px, 2vw, 28px);
  border-left: 1px solid var(--line);
}
.contact-line {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
}
.contact-key {
  flex: none;
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}
.contact-val {
  color: var(--ink);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  padding: 22px 0 34px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.footer-copyright { font-size: 12px; color: var(--slate); }
.footer-legal { font-size: 12px; color: var(--slate); }
.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.legal-links a {
  color: var(--mist);
  transition: color 0.2s var(--ease);
}
.legal-links a:hover { color: var(--cyan); }

/* ---------- 响应式 ---------- */
@media (max-width: 1060px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 79;
    margin-left: 0;
    padding: calc(var(--header-h) + 28px) var(--gutter) 48px;
    background: var(--deep-900);
    border-top: 1px solid var(--line);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease),
                visibility 0.25s var(--ease);
  }
  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-link {
    display: block;
    padding: 18px 0;
    font-size: 17px;
    border-bottom: 1px solid var(--line-soft);
    color: var(--mist);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    color: var(--cyan);
    border-left: 2px solid var(--coral);
    padding-left: 14px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-contact {
    grid-column: 1 / -1;
    padding-left: 0;
    padding-top: 22px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .aside-rail {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 20px;
  }
}

@media (max-width: 880px) {
  .header-tools .btn--ghost { display: none; }
}

@media (max-width: 760px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .lede { font-size: 17px; }
}

@media (max-width: 680px) {
  :root { --header-h: 64px; }
  .header-rail { display: none; }
  .rail-meta { display: none; }
  body { background-size: 56px 56px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 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;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}