/* ============================================================
   乐鱼体育 · 共享站点样式 /assets/site.css
   深海墨蓝底 · 荧光青信息流 · 乐鱼橙强动作
   ============================================================ */

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

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

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

:root {
  --ink-950: #04121F;
  --ink-900: #061B2C;
  --ink-800: #0B2E45;
  --ink-700: #0E4F5C;
  --cyan: #5FF2E3;
  --cyan-deep: #18C8C0;
  --orange: #FF7A2F;
  --lime: #C8FF6A;
  --paper: #F2F7F6;
  --mute: #8AA6B2;

  --text: #D9E7EA;
  --text-dim: var(--mute);
  --line: rgba(95, 242, 227, 0.14);
  --line-strong: rgba(95, 242, 227, 0.38);

  --rail-w: 15rem;
  --radius: 2px;

  --font-display: "Space Grotesk", "Archivo", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --gutter: clamp(1.125rem, 4vw, 3rem);
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 60% at 78% -10%, rgba(24, 200, 192, 0.10), transparent 62%),
    radial-gradient(90% 50% at 0% 100%, rgba(14, 79, 92, 0.35), transparent 70%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.85;
  letter-spacing: 0.008em;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.018em;
  color: var(--paper);
}
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.15rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); }
h4 { font-size: 1rem; }

p { max-width: 42ch; }
a { transition: color 0.2s var(--ease); }

::selection { background: var(--cyan); color: var(--ink-950); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 通用工具类 ---------- */
.container {
  width: 100%;
  max-width: 76rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }

.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }

.section--paper {
  background: var(--paper);
  color: #0A2231;
}
.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4 { color: var(--ink-900); }
.section--paper .eyebrow { color: #0E6A6A; }
.section--paper p { color: #1D3D4C; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  line-height: 1.4;
}

.muted { color: var(--mute); }

.tick-rule {
  display: block;
  height: 0.5rem;
  border-top: 1px solid var(--line-strong);
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 12px);
  background-size: auto 0.25rem;
  background-position: top left;
  background-repeat: repeat-x;
}

#main-content { display: block; scroll-margin-top: 5rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  line-height: 1.2;
  text-align: center;
  color: var(--paper);
  background: var(--ink-800);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { background: var(--ink-700); border-color: var(--cyan); color: var(--cyan); }
.btn:active { transform: translateY(1px); }

.btn--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #1A0B02;
  font-weight: 700;
}
.btn--accent:hover {
  background: #FF9257;
  border-color: #FF9257;
  color: #1A0B02;
}

.btn--cyan {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}
.btn--cyan:hover {
  background: var(--cyan-deep);
  border-color: var(--cyan-deep);
  color: var(--ink-900);
}

.btn--ghost { background: transparent; }
.btn--small { padding: 0.48rem 0.8rem; font-size: 0.6875rem; }
.btn--full { width: 100%; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.tag--orange { color: var(--orange); border-color: rgba(255, 122, 47, 0.55); }
.tag--lime { color: var(--lime); border-color: rgba(200, 255, 106, 0.5); }

/* ---------- 面包屑 ---------- */
.breadcrumbs { margin-bottom: 1.25rem; }
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.breadcrumbs__list li { display: inline-flex; align-items: center; }
.breadcrumbs__list li + li::before {
  content: "/";
  padding-right: 0.4rem;
  color: rgba(138, 166, 178, 0.55);
}
.breadcrumbs__list a { color: var(--mute); }
.breadcrumbs__list a:hover { color: var(--cyan); }
.breadcrumbs__list [aria-current="page"] { color: var(--paper); }

/* ---------- 正文 ---------- */
.prose {
  max-width: 38rem;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--text);
}
.prose > p + p { margin-top: 1.1em; }
.prose h2 { margin-top: 2.2em; margin-bottom: 0.6em; }
.prose h3 {
  margin-top: 1.9em;
  margin-bottom: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.prose ul, .prose ol { display: grid; gap: 0.5rem; margin-top: 1em; }
.prose li { position: relative; padding-left: 1.15rem; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 0.45rem;
  height: 1px;
  background: var(--cyan);
}
.prose strong { color: var(--paper); font-weight: 700; }

/* ---------- 图片容器（页面阶段放 <img>） ---------- */
.figure {
  margin: 0;
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.figure__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    radial-gradient(80% 120% at 20% 0%, rgba(95, 242, 227, 0.18), transparent 60%),
    linear-gradient(155deg, var(--ink-700), var(--ink-900) 72%);
}
.figure__media img,
.figure__media picture,
.figure__media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__caption {
  padding: 0.7rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px solid var(--line);
}
.figure--wide .figure__media { aspect-ratio: 21 / 9; }
.figure--tall .figure__media { aspect-ratio: 4 / 5; }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 100;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-deep) 62%, var(--orange));
}

/* ---------- 显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 可展开内容组 ---------- */
.disclosure {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease);
}
.disclosure[data-open="true"] { border-color: var(--line-strong); }

.disclosure__toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}
.disclosure__icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--cyan);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: transform 0.3s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.disclosure[data-open="true"] .disclosure__icon {
  transform: rotate(45deg);
  color: var(--orange);
  border-color: rgba(255, 122, 47, 0.55);
}
.disclosure__panel {
  height: 0;
  overflow: hidden;
  transition: height 0.32s var(--ease);
}
.disclosure__inner {
  padding: 0.15rem 1rem 1rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text);
}
.disclosure__inner p { max-width: none; }

/* ============================================================
   头部 / 侧边轨道导航
   ============================================================ */
.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: var(--radius);
  transform: translateY(-220%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(4, 18, 31, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header__bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.75rem;
  padding: 0.5rem var(--gutter);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}
.brand__mark {
  flex: none;
  width: 0.55rem;
  height: 1.75rem;
  border-radius: 1px;
  background-image: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 5px);
}
.brand__text { display: block; min-width: 0; }
.brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.brand__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--mute);
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex: none;
  padding: 0.5rem 0.7rem;
  color: var(--paper);
  background: var(--ink-800);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__lines { display: grid; gap: 4px; width: 1rem; }
.nav-toggle__lines span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle__lines span:first-child { transform: translateY(2.5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__lines span:last-child { transform: translateY(-2.5px) rotate(-45deg); }

/* 移动端抽屉 */
.rail-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  padding: 1.25rem var(--gutter) 1.6rem;
  background: var(--ink-800);
  border-bottom: 1px solid var(--line-strong);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.5rem);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
}
.site-header[data-open="true"] .rail-nav {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.rail-nav__index {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  max-width: none;
}

.rail-nav__list { counter-reset: nav; display: flex; flex-direction: column; }

.rail-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.62rem 0.35rem 0.62rem 0.65rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
  border-bottom: 1px solid rgba(95, 242, 227, 0.07);
  transition: color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.rail-nav__link::before {
  counter-increment: nav;
  content: counter(nav, decimal-leading-zero);
  flex: none;
  width: 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: var(--mute);
  transition: color 0.2s var(--ease);
}
.rail-nav__link:hover,
.rail-nav__link:focus-visible {
  color: var(--cyan);
  background: rgba(95, 242, 227, 0.05);
}
.rail-nav__link:hover::before { color: var(--cyan-deep); }
.rail-nav__link[aria-current="page"] {
  color: var(--cyan);
  box-shadow: inset 2px 0 0 var(--cyan);
}
.rail-nav__link[aria-current="page"]::before { color: var(--orange); }

.rail-nav__cta { width: 100%; margin-top: 0.25rem; }

.rail-nav__meta {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--mute);
  max-width: none;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-top: clamp(2.5rem, 5vw, 4rem);
  background: var(--ink-950);
  border-top: 1px solid var(--line-strong);
  color: var(--text);
}
.site-footer__ticks {
  position: absolute;
  inset: 0 0 auto 0;
  border-top: 0;
}

.footer-inner {
  width: 100%;
  max-width: 76rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: 1.5rem;
}

.footer-top { display: grid; gap: 2.5rem; }

.footer-brand__mark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--paper);
}
.footer-brand__glyph {
  width: 0.5rem;
  height: 1.35rem;
  border-radius: 1px;
  background-image: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 5px);
}
.footer-brand__line {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  line-height: 1.7;
  color: var(--cyan);
}
.footer-brand__note {
  margin-top: 0.9rem;
  max-width: 28rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--mute);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 2rem;
}

.footer-col__title {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--mute);
}
.footer-col__idx {
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}
.footer-col__list { display: grid; gap: 0.15rem; }
.footer-col__list a {
  display: inline-block;
  padding: 0.32rem 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.footer-col__list a:hover {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.footer-contact {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: 1.25rem 1.25rem 1.15rem;
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}
.footer-contact__item { min-width: 0; }
.footer-contact__label {
  display: block;
  margin-bottom: 0.28rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-contact__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}
.footer-contact__value--addr {
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}
.footer-contact__note {
  grid-column: 1 / -1;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
  max-width: none;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--mute);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.07em;
  color: var(--mute);
}
.footer-copy, .footer-icp { max-width: none; }

/* ============================================================
   断点
   ============================================================ */
@media (max-width: 30rem) {
  .brand__tag { display: none; }
  .footer-cols { grid-template-columns: 1fr; }
}

@media (min-width: 48rem) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    gap: 3rem;
    align-items: start;
  }
  .footer-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem 1.75rem;
    padding: 1.4rem 1.5rem 1.3rem;
  }
  .figure--wide .figure__media { aspect-ratio: 21 / 9; }
}

@media (min-width: 64rem) {
  body { padding-left: var(--rail-w); }

  .scroll-progress {
    left: var(--rail-w);
    width: calc(100% - var(--rail-w));
  }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.75rem 1.25rem 1.5rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 62%, var(--ink-800) 100%);
    border-right: 1px solid var(--line);
    border-bottom: 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    scrollbar-width: thin;
  }

  .site-header__bar {
    display: block;
    min-height: 0;
    padding: 0;
  }
  .nav-toggle { display: none; }

  .rail-nav {
    position: static;
    flex: 1 1 auto;
    gap: 0.7rem;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: none;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }
  .rail-nav__index {
    padding-bottom: 0.7rem;
    border-bottom: 1px solid var(--line);
  }
  .rail-nav__link {
    font-size: 0.9375rem;
    padding: 0.55rem 0.35rem 0.55rem 0.65rem;
  }
  .rail-nav__cta { margin-top: auto; }
  .rail-nav__meta { margin-top: 0.4rem; }

  .footer-top { gap: 4rem; }
  .footer-cols { gap: 2rem 3rem; }
}

@media (min-width: 90rem) {
  body { padding-left: 17rem; }
  :root { --rail-w: 17rem; }
  .site-header { width: 17rem; }
  .scroll-progress { left: 17rem; width: calc(100% - 17rem); }
}

/* ============================================================
   无障碍与动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress { display: none; }
}