/* ============================================================
   乐鱼平台 · 共享样式 /assets/site.css
   深海观赛舱：深渊蓝底 + 珊瑚橙锚点 + 荧光青数据层
   ============================================================ */

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

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

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  --abyss: #061826;
  --trench: #0B2A3F;
  --current: #0F4160;
  --foam: #F4FBFF;
  --coral: #FF6B4A;
  --coral-soft: #FFA48C;
  --cyan: #35E0D0;
  --mist: #B9D6E4;
  --ink: #07131C;
  --shallow: #DDF7F3;

  --text: #E3F2F9;
  --text-dim: #B9D6E4;
  --line: rgba(185, 214, 228, 0.16);
  --line-strong: rgba(185, 214, 228, 0.34);

  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular",
    Consolas, "Liberation Mono", "Courier New", monospace;

  --rail-w: 264px;
  --page-max: 1240px;
  --gap: 24px;
  --cut: 18px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.24s;
}

/* ---------- 3. Base typography ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--abyss);
  background-image:
    radial-gradient(900px 520px at 82% -8%, rgba(15, 65, 96, 0.55), transparent 68%),
    radial-gradient(720px 460px at 6% 104%, rgba(53, 224, 208, 0.07), transparent 70%);
  background-attachment: fixed;
  padding-left: var(--rail-w);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  color: var(--foam);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

p { max-width: 44em; }

strong, b { font-weight: 700; color: var(--foam); }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: 0.04em;
}

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

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

/* ---------- 4. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: 32px;
}

.section { position: relative; padding-block: 72px; }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  margin-bottom: 34px;
}

.section-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(54px, 8vw, 118px);
  line-height: 0.78;
  letter-spacing: -0.04em;
  color: rgba(185, 214, 228, 0.18);
  user-select: none;
  font-variant-numeric: tabular-nums;
}

.section-kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  background: var(--coral);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--foam);
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

.wave-divider {
  height: 56px;
  background: linear-gradient(100deg, var(--current), var(--trench) 46%, rgba(255, 107, 74, 0.22));
  clip-path: polygon(0 46%, 100% 0, 100% 54%, 0 100%);
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 300;
  padding: 10px 20px;
  background: var(--coral);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

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

/* ---------- 6. Header / side rail ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 30px 20px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(178deg, var(--trench) 0%, #08202F 52%, var(--abyss) 100%);
  border-right: 1px solid var(--line);
  scrollbar-width: thin;
}

.site-header::after {
  content: "";
  position: absolute;
  top: 14px;
  right: 5px;
  bottom: 14px;
  width: 1px;
  background: repeating-linear-gradient(
    180deg,
    rgba(185, 214, 228, 0.42) 0 1px,
    transparent 1px 12px
  );
  pointer-events: none;
}

/* Brand */
.brand {
  display: block;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--foam);
}

.brand-mark::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--coral);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.brand-tag {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* Toggle (hidden on desktop) */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  color: var(--foam);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  transition: border-color var(--dur), color var(--dur), background-color var(--dur);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(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(-5px) rotate(-45deg); }

/* Nav */
.site-nav {
  display: flex;
  flex-direction: column;
  gap: 22px;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-index-label,
.nav-quick-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(185, 214, 228, 0.55);
}

.nav-index-label { margin-bottom: 10px; }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item { display: block; }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 1px solid var(--line-strong);
  color: var(--text-dim);
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.nav-link:hover {
  color: var(--foam);
  border-left-color: var(--cyan);
  background: rgba(53, 224, 208, 0.08);
  padding-left: 16px;
}

.nav-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: rgba(185, 214, 228, 0.5);
  transition: color var(--dur) var(--ease);
}

.nav-link:hover .nav-num { color: var(--cyan); }

.nav-text { display: inline-block; }

.nav-link[aria-current="page"] {
  color: var(--foam);
  border-left-color: var(--coral);
  background: linear-gradient(90deg, rgba(255, 107, 74, 0.2), transparent 88%);
}

.nav-link[aria-current="page"] .nav-num { color: var(--coral); }

/* Quick chips */
.nav-quick { display: flex; flex-direction: column; gap: 10px; }

.nav-quick-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-chip {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  transition: background-color var(--dur), color var(--dur), border-color var(--dur);
}

.quick-chip:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.nav-note {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  line-height: 1.6;
  color: rgba(185, 214, 228, 0.55);
}

/* Scrim */
.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(6, 24, 38, 0.74);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s var(--ease), visibility 0.28s var(--ease);
}

.nav-scrim[hidden] { display: none; }

/* ---------- 7. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  padding: 60px 0 28px;
  color: var(--text-dim);
  background: linear-gradient(180deg, var(--abyss) 0%, #0A2536 58%, #071B29 100%);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 42px;
  background: linear-gradient(100deg, rgba(255, 107, 74, 0.22), rgba(53, 224, 208, 0.12));
  clip-path: polygon(0 0, 100% 0, 100% 20%, 0 100%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.45fr);
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

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

.footer-mark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--foam);
  transition: color var(--dur);
}

.footer-mark:hover { color: var(--cyan); }

.footer-region {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.footer-note {
  margin-top: 18px;
  max-width: 30em;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(185, 214, 228, 0.72);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

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

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(185, 214, 228, 0.55);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 13.5px;
}

.footer-list a {
  color: var(--text-dim);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-list a:hover { color: var(--cyan); padding-left: 4px; }

.footer-list--contact li {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(185, 214, 228, 0.8);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.03em;
  word-break: break-all;
}

.footer-address {
  font-family: var(--font-body);
  letter-spacing: 0;
  color: rgba(185, 214, 228, 0.72) !important;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(185, 214, 228, 0.6);
}

.footer-icp { color: var(--text-dim); }
.footer-copy { color: rgba(185, 214, 228, 0.6); }

/* ---------- 8. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform 0.18s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--coral {
  background: var(--coral);
  color: var(--ink);
}

.btn--coral:hover { background: var(--coral-soft); }

.btn--cyan {
  background: var(--cyan);
  color: var(--ink);
}

.btn--cyan:hover { background: var(--shallow); }

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--foam);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 9. Tags & filters ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
  white-space: nowrap;
}

.tag--schedule { background: var(--current); color: var(--foam); }
.tag--score { background: var(--coral); color: var(--ink); }
.tag--review { background: var(--cyan); color: var(--ink); }
.tag--feedback { background: var(--coral-soft); color: var(--ink); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.filter-btn:hover { border-color: var(--cyan); color: var(--cyan); }

.filter-btn[aria-pressed="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 10. Panels & media ---------- */
.panel {
  position: relative;
  background: linear-gradient(160deg, rgba(15, 65, 96, 0.62), rgba(11, 42, 63, 0.94));
  border: 1px solid var(--line);
  padding: 26px;
}

.panel--cut {
  border: 0;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%,
    var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.panel--flat {
  background: var(--foam);
  color: var(--ink);
}

.panel--flat h2,
.panel--flat h3 { color: var(--ink); }

/* 图片容器：页面阶段直接放入 <img> 即可 */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(145deg, var(--current) 0%, #0A2436 58%, var(--abyss) 100%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%,
    20px 100%, 0 calc(100% - 20px));
}

.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(112deg,
      rgba(53, 224, 208, 0.10) 0 2px,
      transparent 2px 15px),
    linear-gradient(180deg, transparent 52%, rgba(6, 24, 38, 0.55));
  mix-blend-mode: screen;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(185, 214, 228, 0.6);
}

/* ---------- 11. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(185, 214, 228, 0.65);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(185, 214, 228, 0.4);
}

.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.breadcrumb [aria-current="page"] { color: var(--coral); }

/* ---------- 12. Motion ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

[data-progress] {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: 2px;
  z-index: 200;
  background: linear-gradient(90deg, var(--coral), var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  transition: transform 0.12s linear;
}

/* ---------- 13. Tablet ---------- */
@media (max-width: 1180px) {
  :root { --gap: 20px; }
  .container { padding-inline: 26px; }
  .footer-top { gap: 34px; }
}

@media (max-width: 980px) {
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9 { grid-column: span 12; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
  .section-head { grid-template-columns: 1fr; gap: 14px; }
}

/* ---------- 14. Mobile rail → drawer ---------- */
@media (max-width: 960px) {
  html { scroll-padding-top: 78px; }

  body {
    padding-left: 0;
    padding-top: 64px;
    background-attachment: scroll;
  }

  .site-header {
    top: 0;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: 64px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
    background: rgba(11, 42, 63, 0.97);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }

  .site-header::after { display: none; }

  .brand {
    padding: 0;
    border-bottom: 0;
    min-width: 0;
  }

  .brand-mark { font-size: 17px; gap: 7px; }
  .brand-mark::before { width: 8px; height: 8px; }
  .brand-tag { font-size: 9px; letter-spacing: 0.1em; margin-top: 2px; }

  .nav-toggle { display: inline-flex; flex: none; }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex: none;
    max-height: calc(100vh - 64px);
    max-height: calc(100dvh - 64px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 20px 18px 30px;
    gap: 18px;
    background: linear-gradient(180deg, var(--trench) 0%, #08202F 68%, var(--abyss) 100%);
    border-bottom: 1px solid var(--line-strong);
    transform: translateY(-115%);
    visibility: hidden;
    transition: transform 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .site-header[data-open] .site-nav {
    transform: translateY(0);
    visibility: visible;
  }

  .nav-link {
    padding: 12px 12px 12px 14px;
    font-size: 16px;
    border-left-width: 2px;
  }

  .nav-link:hover { padding-left: 18px; }

  .nav-num { font-size: 11px; }

  .nav-note { margin-top: 10px; }

  .nav-scrim { display: block; }

  .site-header[data-open] ~ .nav-scrim {
    opacity: 1;
    visibility: visible;
  }

  [data-progress] { left: 0; }

  .section { padding-block: 52px; }
  .container { padding-inline: 18px; }
  .panel { padding: 20px; }
  .site-footer { margin-top: 64px; padding-top: 52px; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  body { font-size: 15.5px; }
  .footer-nav { grid-template-columns: 1fr; gap: 22px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .btn { width: 100%; }
  .filter-btn { flex: 1 1 auto; text-align: center; }
}

/* ---------- 15. Reduced motion ---------- */
@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.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

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