/* ============ 乐鱼赛场 · 共享样式 /assets/site.css ============ */

:root {
  --ink-900: #061522;
  --ink-800: #0A2238;
  --ink-700: #0D2B45;
  --line: #1E3A4F;
  --cyan: #35E6E0;
  --coral: #FF6B4A;
  --white: #F2F7FB;
  --mute: #91A8B9;
  --mint: #7CFFCB;
  --amber: #FFB020;
  --shell: 1200px;
  --header-h: 110px;
  --dur: 160ms;
  --shadow-hard: 8px 8px 0 rgba(6, 21, 34, 0.55);
  --font-display: "Barlow Condensed", "Noto Sans SC Condensed", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

* { margin: 0; }

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--white);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(920px 540px at 88% -8%, rgba(53, 230, 224, 0.13), rgba(53, 230, 224, 0) 62%),
    radial-gradient(760px 620px at 2% 108%, rgba(255, 107, 74, 0.10), rgba(255, 107, 74, 0) 60%),
    repeating-linear-gradient(90deg, rgba(30, 58, 79, 0.30) 0 1px, rgba(30, 58, 79, 0) 1px 120px),
    repeating-linear-gradient(0deg, rgba(30, 58, 79, 0.20) 0 1px, rgba(30, 58, 79, 0) 1px 120px),
    linear-gradient(158deg, #061522 0%, #0A2238 58%, #05121D 100%);
  background-repeat: no-repeat, no-repeat, repeat, repeat, no-repeat;
  background-size: auto, auto, auto, auto, 100% 100%;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

a:hover { color: var(--white); }

button { font: inherit; color: inherit; }

ul,
ol { padding-left: 1.15em; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--white);
  word-break: break-word;
}

p { word-break: break-word; }

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

#main-content { scroll-margin-top: 140px; }

/* ---------- 基础工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 40px);
}

.mono { font-family: var(--font-mono); letter-spacing: 0.04em; }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 300;
  padding: 0.7rem 1.15rem;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 2px solid var(--ink-900);
  transform: translateY(-200%);
  transition: transform var(--dur) ease;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease, transform var(--dur) ease, box-shadow var(--dur) ease;
}

.btn--sm { padding: 0.6rem 1rem; font-size: 0.92rem; }

.btn--coral {
  background: var(--coral);
  color: var(--ink-900);
  border-color: var(--coral);
  box-shadow: 4px 4px 0 rgba(255, 107, 74, 0.25);
}

.btn--coral:hover {
  background: #FF8A6E;
  color: var(--ink-900);
  border-color: #FFC0AE;
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(255, 107, 74, 0.3);
}

.btn--cyan {
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--cyan);
  box-shadow: 4px 4px 0 rgba(53, 230, 224, 0.2);
}

.btn--cyan:hover {
  background: #7FF3EF;
  color: var(--ink-900);
  border-color: var(--white);
}

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

.btn--ghost:hover {
  background: rgba(53, 230, 224, 0.1);
  color: var(--white);
  border-color: var(--cyan);
}

.btn--cta { white-space: nowrap; }

/* ---------- 标签 / 面板 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(53, 230, 224, 0.09);
  border: 1px solid rgba(53, 230, 224, 0.45);
  border-radius: 2px;
}

.tag--coral {
  color: var(--coral);
  background: rgba(255, 107, 74, 0.1);
  border-color: rgba(255, 107, 74, 0.5);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 32px);
  background: linear-gradient(160deg, rgba(10, 34, 56, 0.94), rgba(6, 21, 34, 0.94));
  border: 2px solid var(--line);
  border-radius: 2px;
  box-shadow: var(--shadow-hard);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

.breadcrumb__link {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.breadcrumb__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.breadcrumb__current { color: var(--white); }

/* ---------- 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: rgba(242, 247, 251, 0.9);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  margin-top: 1.9em;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  color: var(--white);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  color: var(--cyan);
}

.prose ul,
.prose ol { padding-left: 1.25em; }

.prose li + li { margin-top: 0.4em; }

.prose a { font-weight: 500; }

/* ---------- 媒体容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 2px;
  background-image:
    repeating-linear-gradient(45deg, rgba(30, 58, 79, 0.4) 0 10px, rgba(30, 58, 79, 0) 10px 20px),
    linear-gradient(140deg, rgba(53, 230, 224, 0.12), rgba(255, 107, 74, 0.08));
  background-color: var(--ink-800);
}

.media-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  background: linear-gradient(0deg, rgba(6, 21, 34, 0.94), rgba(6, 21, 34, 0));
}

/* ============ 页头 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(6, 21, 34, 0.98), rgba(10, 34, 56, 0.97));
  border-bottom: 2px solid var(--line);
  transition: background var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.site-header[data-overlay="true"] {
  background: linear-gradient(180deg, rgba(6, 21, 34, 0.84) 0%, rgba(6, 21, 34, 0.26) 64%, rgba(6, 21, 34, 0) 100%);
  border-bottom-color: transparent;
}

.site-header[data-condensed="true"] {
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.45);
}

.header-rail {
  background: rgba(6, 21, 34, 0.94);
  border-bottom: 1px solid rgba(30, 58, 79, 0.85);
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.site-header[data-overlay="true"] .header-rail {
  background: transparent;
  border-bottom-color: rgba(30, 58, 79, 0.45);
}

.header-rail__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 32px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
  overflow: hidden;
}

.header-rail__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.header-rail__item--end {
  margin-left: auto;
  color: var(--cyan);
}

.dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(124, 255, 203, 0.18);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  min-height: 76px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--white);
}

.brand:hover { color: var(--white); }

.brand__mark {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  width: 38px;
  height: 38px;
  padding: 8px;
  flex: none;
  background: rgba(53, 230, 224, 0.08);
  border: 2px solid var(--cyan);
  border-radius: 2px;
  box-shadow: 4px 4px 0 rgba(53, 230, 224, 0.18);
  transition: box-shadow var(--dur) ease, background var(--dur) ease;
}

.brand:hover .brand__mark {
  background: rgba(53, 230, 224, 0.16);
  box-shadow: 5px 5px 0 rgba(53, 230, 224, 0.3);
}

.brand__bar {
  display: block;
  width: 100%;
  background: var(--cyan);
  height: 100%;
}

.brand__bar:nth-child(1) { height: 42%; }
.brand__bar:nth-child(2) { height: 68%; }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.32rem;
  line-height: 1.05;
  letter-spacing: 0.06em;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--mute);
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--mute);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 2px;
  transition: color var(--dur) ease, background var(--dur) ease, border-color var(--dur) ease;
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: rgba(53, 230, 224, 0.62);
}

.site-nav__link:hover {
  color: var(--white);
  background: rgba(53, 230, 224, 0.08);
  border-color: var(--line);
}

.site-nav__link[aria-current="page"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--ink-800);
  font-weight: 700;
}

.site-nav__panel { display: none; }

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

/* 菜单开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 0.5rem 0.7rem;
  background: transparent;
  color: var(--cyan);
  border: 2px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color var(--dur) ease, background var(--dur) ease, color var(--dur) ease;
}

.nav-toggle:hover {
  border-color: var(--cyan);
  background: rgba(53, 230, 224, 0.08);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 20px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--cyan);
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}

/* 进度刻度 */
.scroll-meter {
  height: 3px;
  background: rgba(30, 58, 79, 0.61);
  overflow: hidden;
}

.scroll-meter__fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--coral));
  transition: transform 0.1s linear;
}

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(4, 12, 20, 0.74);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) ease;
}

.site-header[data-nav-open="true"] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ============ 页脚 ============ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  color: var(--white);
  background: linear-gradient(180deg, #071B2C 0%, #05121D 58%, #061522 100%);
  border-top: 2px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 18px, rgba(53, 230, 224, 0) 18px 42px);
  opacity: 0.55;
  pointer-events: none;
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 34px);
  padding-block: clamp(44px, 6vw, 80px) clamp(28px, 4vw, 48px);
}

.footer-brand {
  grid-column: span 6;
  min-width: 0;
}

.brand--footer .brand__mark { width: 42px; height: 42px; }

.brand--footer .brand__name { font-size: 1.5rem; }

.footer-brand__line {
  margin-top: 18px;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  letter-spacing: 0.04em;
  color: var(--white);
}

.footer-brand__note {
  margin-top: 12px;
  max-width: 38ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mute);
}

.footer-col { grid-column: span 2; min-width: 0; }

.footer-col__title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid var(--line);
}

.footer-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-block: 2px;
  font-size: 0.94rem;
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.footer-link::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--cyan);
  opacity: 0;
  transition: opacity var(--dur) ease;
}

.footer-link:hover {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

.footer-link:hover::before { opacity: 1; }

.footer-contact {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px 28px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.footer-contact__item { min-width: 0; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-contact__value {
  margin-top: 4px;
  font-size: 0.98rem;
  color: var(--white);
  word-break: break-word;
}

.footer-contact__note {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--mute);
}

.footer-base-wrap {
  border-top: 1px solid var(--line);
  background: rgba(6, 21, 34, 0.62);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  padding-block: 20px;
}

.footer-base__meta {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.footer-base__icp {
  padding-left: 10px;
  border-left: 1px solid var(--line);
  color: rgba(145, 168, 185, 0.9);
}

.footer-base__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
}

.footer-base__link {
  font-size: 0.85rem;
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.footer-base__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.45rem 0.85rem;
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  border: 2px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease;
}

.to-top:hover {
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--cyan);
}

/* ---------- 显现协议 ---------- */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  :root { --header-h: 96px; }

  .header-rail__inner {
    gap: 12px;
    min-height: 28px;
    font-size: 0.62rem;
  }

  .header-rail__item--end { display: none; }

  .header-bar {
    min-height: 64px;
    gap: 12px;
  }

  .brand__name { font-size: 1.15rem; }
  .brand__tag { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 120;
    width: min(88vw, 400px);
    margin-left: 0;
    padding: 92px 22px 28px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 22px;
    overflow-y: auto;
    background: linear-gradient(180deg, #071B2C 0%, #0A2238 46%, #05121D 100%);
    border-left: 2px solid var(--line);
    box-shadow: -20px 0 44px rgba(0, 0, 0, 0.5);
    transform: translateX(103%);
    visibility: hidden;
    transition: transform var(--dur) ease, visibility 0s linear var(--dur);
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--dur) ease, visibility 0s linear 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .site-nav__link {
    padding: 14px 12px;
    font-size: 1.04rem;
    color: var(--white);
    background: rgba(6, 21, 34, 0.38);
    border-color: rgba(30, 58, 79, 0.7);
  }

  .site-nav__num { font-size: 0.7rem; }

  .site-nav__panel {
    display: grid;
    gap: 12px;
    margin-top: auto;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }

  .site-nav__panel .btn { width: 100%; }

  .site-nav__panel-note {
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--mute);
  }

  .btn--cta { display: none; }

  .footer-brand { grid-column: span 12; }
  .footer-col { grid-column: span 4; }

  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 981px) {
  .nav-scrim { display: none; }
}

@media (max-width: 980px) {
  body.is-nav-locked { overflow: hidden; }
}

@media (max-width: 700px) {
  .footer-col { grid-column: span 6; }
  .footer-contact { grid-template-columns: 1fr; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-base__links { gap: 10px 16px; }
}

@media (max-width: 460px) {
  .header-rail__inner { font-size: 0.58rem; letter-spacing: 0.1em; }
  .brand__mark { width: 34px; height: 34px; padding: 7px; }
  .brand__name { font-size: 1.05rem; }
  .footer-col { grid-column: span 12; }
  .footer-brand__line { font-size: 0.98rem; }
}

/* ---------- 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;
    scroll-behavior: auto !important;
  }

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

  .scroll-meter__fill { transition: none; }
}