/* ============================================================
   夜色野播 Site Kit — Shared CSS
   文件位置：/assets/site.css
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; border: none; background: none; }
a { color: inherit; text-decoration: none; }

/* ---------- 2. Variables ---------- */
:root {
  --font-display: Impact, "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, monospace;

  --bg-deep: #0A0B0F;
  --bg-panel: #12141A;
  --bg-raise: #171A22;
  --green: #39FF88;
  --purple: #8B5CF6;
  --orange: #FF6A00;
  --ink: #F5F5F7;
  --ink-dim: #A0A3B1;
  --ink-faint: #5F6373;
  --line: #2A2D3A;

  --container-w: 1240px;
  --container-pad: clamp(16px, 4vw, 32px);
  --ease-out: cubic-bezier(.22, .61, .36, 1);
  --dur: .35s;
}

/* ---------- 3. Base Typography ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--ink);
  background-color: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: .02em;
  color: var(--ink);
}
h1 { font-size: clamp(2.8rem, 6vw, 5.2rem); transform: skewX(-3deg); }
h2 { font-size: clamp(2rem, 3vw, 3.2rem); transform: skewX(-3deg); }
h3 { font-size: 1.6rem; }
h4 {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 1rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

::selection { background: var(--green); color: #0A110C; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; border-radius: 2px; }
html { scrollbar-color: var(--line) var(--bg-deep); }

#main-content { scroll-margin-top: 2rem; outline: none; }

/* ---------- 4. Layout Utilities ---------- */
.container { max-width: var(--container-w); margin-inline: auto; padding-inline: var(--container-pad); }
.container--narrow { max-width: 860px; }

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--band {
  position: relative;
  background:
    linear-gradient(115deg, rgba(139,92,246,.10), transparent 38%),
    linear-gradient(235deg, rgba(57,255,136,.06), transparent 42%),
    var(--bg-panel);
  border-block: 1px solid var(--line);
}
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  margin-bottom: 1.8rem;
}
.section__title { font-size: clamp(1.8rem, 3vw, 2.6rem); transform: skewX(-3deg); }
.section__more {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  transition: color var(--dur);
}
.section__more:hover { color: var(--green); }

.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
@media (max-width: 860px) {
  .grid--2, .grid--3, .grid--4, .grid--12 { grid-template-columns: 1fr; }
}

/* ---------- 5. Common Components ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .6rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur), color var(--dur), box-shadow var(--dur);
}
.btn:hover { border-color: var(--purple); color: var(--green); }
.btn--primary { background: var(--green); border-color: var(--green); color: #0A140F; font-weight: 700; }
.btn--primary:hover { background: transparent; color: var(--green); box-shadow: 0 0 22px rgba(57,255,136,.35); }
.btn--ghost { border-color: rgba(139,92,246,.55); color: var(--ink); }
.btn--ghost:hover { border-color: var(--purple); background: rgba(139,92,246,.12); color: var(--ink); }

.tag {
  display: inline-block;
  padding: .25em .7em;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(18,20,26,.4);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--live { color: var(--green); border-color: rgba(57,255,136,.4); background: rgba(57,255,136,.08); }
.tag--hot { color: var(--orange); border-color: rgba(255,106,0,.45); background: rgba(255,106,0,.08); }
.tag--free { color: var(--purple); border-color: rgba(139,92,246,.45); background: rgba(139,92,246,.08); }

.panel {
  position: relative;
  padding: clamp(1.2rem, 2.4vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: 0;
  background: linear-gradient(145deg, var(--bg-raise), var(--bg-panel));
}
.panel--chamfer {
  padding: clamp(1.4rem, 2.5vw, 2rem);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.panel__title { font-family: var(--font-display); font-weight: 900; font-size: 1.3rem; letter-spacing: .04em; margin-bottom: .5rem; }
.panel__body { color: var(--ink-dim); }

.data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--green);
}
.data-label {
  display: block;
  margin-top: .4rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.eyebrow { display: inline-flex; align-items: center; gap: .5em; font-family: var(--font-mono); font-size: .76rem; letter-spacing: .18em; text-transform: uppercase; color: var(--purple); }
.eyebrow::before { content: "//"; color: var(--green); font-weight: 700; }

.slash-divider { height: 8px; border: 0; margin: 0; background: repeating-linear-gradient(115deg, var(--line) 0 8px, transparent 8px 16px); }

.breadcrumb { display: flex; flex-wrap: wrap; gap: .4rem .6rem; padding: 0 0 1.2rem; list-style: none; font-family: var(--font-mono); font-size: .76rem; letter-spacing: .05em; color: var(--ink-faint); }
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before { content: "/"; margin-right: .6rem; color: var(--line); }
.breadcrumb a { color: var(--ink-dim); transition: color var(--dur); }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

.article { max-width: 46em; margin-inline: auto; }
.article__lead { font-size: 1.12rem; line-height: 1.8; color: var(--ink); }
.article p { margin-bottom: 1.1em; color: var(--ink-dim); }
.article a { color: var(--green); text-decoration: underline; text-underline-offset: .2em; }

.image-slot {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(139,92,246,.16), transparent 42%),
    linear-gradient(315deg, rgba(57,255,136,.10), transparent 50%),
    linear-gradient(160deg, #10141E, #0B0D13 60%);
}
.image-slot::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 46%, rgba(255,255,255,.09) 50%, transparent 54%);
  background-size: 260% 260%;
  background-position: 100% 50%;
  animation: scan-sweep 5.2s ease-in-out infinite alternate;
}
.image-slot::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 22%;
  background: linear-gradient(180deg, transparent, rgba(10,11,15,.85));
}
.image-slot--wide { aspect-ratio: 21 / 9; }
.image-slot--video { aspect-ratio: 4 / 3; }
.image-slot--square { aspect-ratio: 1 / 1; }
.image-slot--poster { aspect-ratio: 3 / 4; }
@keyframes scan-sweep {
  from { background-position: 100% 50%; }
  to { background-position: -100% 50%; }
}

.fragment {
  display: inline-block;
  width: 15px;
  height: 23px;
  background: var(--purple);
  clip-path: polygon(56% 0, 0 58%, 47% 58%, 33% 100%, 100% 38%, 53% 38%, 66% 0);
}
.fragment--green { background: var(--green); }
.fragment--orange { background: var(--orange); }

/* ---------- 6. Skip Link / Scroll Progress / Back Top ---------- */
.skip-link {
  position: fixed;
  top: 10px; left: 10px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--green);
  color: #08120B;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 2px;
  opacity: 0;
  transform: translateY(-300%);
  transition: transform .25s var(--ease-out), opacity .25s;
}
.skip-link:focus { opacity: 1; transform: translateY(0); }

.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 1800;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--purple), var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.back-top {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: 28px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid rgba(139,92,246,.55);
  border-radius: 2px;
  background: rgba(18,20,26,.9);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--dur), visibility 0s linear var(--dur), transform var(--dur) var(--ease-out), border-color var(--dur), color var(--dur);
}
.back-top:hover { color: var(--green); border-color: var(--green); }
.back-top--show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur), transform var(--dur) var(--ease-out), border-color var(--dur), color var(--dur);
}

/* ---------- 7. Header & Navigation ---------- */
.site-header {
  position: relative;
  z-index: 300;
  background:
    radial-gradient(130% 200% at 50% -80%, rgba(139,92,246,.18), transparent 55%),
    linear-gradient(180deg, #0D0F16 0%, #0A0B0F 100%);
  border-bottom: 1px solid var(--line);
}

.masthead {
  position: relative;
  z-index: 500;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 18px var(--container-pad);
}

.masthead-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  justify-self: start;
  min-width: 0;
}
.masthead-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid rgba(57,255,136,.4);
  border-radius: 2px;
  background: rgba(57,255,136,.08);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  animation: live-pill-glow 3s ease-in-out infinite;
}
.live-pill__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: live-dot-pulse 1.4s ease-in-out infinite;
}
.live-pill__text { line-height: 1; }
@keyframes live-dot-pulse { 0%, 100% { opacity: 1; box-shadow: 0 0 4px var(--green); } 50% { opacity: .4; box-shadow: 0 0 12px var(--green); } }
@keyframes live-pill-glow { 0%, 100% { box-shadow: 0 0 0 rgba(57,255,136,0); } 50% { box-shadow: 0 0 16px rgba(57,255,136,.18); } }

.masthead-clock { display: inline-flex; align-items: baseline; gap: 8px; font-family: var(--font-mono); }
.masthead-clock__label { font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); }
.masthead-clock__time { display: inline-block; min-width: 7ch; text-align: right; font-size: .85rem; letter-spacing: .08em; color: var(--ink); }

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-self: center;
  row-gap: 6px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}
.brand__row { display: inline-flex; align-items: center; gap: 8px; }
.brand__mark { width: 24px; height: 24px; flex: 0 0 auto; color: var(--purple); filter: drop-shadow(0 0 8px rgba(139,92,246,.5)); }
.brand__name {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: .06em;
  white-space: nowrap;
  transform: skewX(-3deg);
}
.brand__slogan {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}

.masthead-cta { padding: .5rem .95rem; font-size: .72rem; letter-spacing: .1em; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(18,20,26,.5);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--dur), color var(--dur), background var(--dur);
}
.nav-toggle:hover { border-color: var(--purple); background: rgba(139,92,246,.1); }
.nav-toggle[aria-expanded="true"] { border-color: var(--green); color: var(--green); }
.nav-toggle__label { line-height: 1; }
.nav-toggle__icon { position: relative; display: block; width: 16px; height: 11px; }
.nav-toggle__icon span { position: absolute; left: 0; width: 16px; height: 2px; background: currentColor; transition: top .28s var(--ease-out), transform .28s var(--ease-out), opacity .2s; }
.nav-toggle__icon span:nth-child(1) { top: 0; }
.nav-toggle__icon span:nth-child(2) { top: 4.5px; }
.nav-toggle__icon span:nth-child(3) { top: 9px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) { top: 4.5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) { top: 4.5px; transform: rotate(-45deg); }

.site-nav { position: relative; z-index: 100; background: rgba(14,16,23,.72); border-top: 1px solid var(--line); }
.site-nav__inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 0 var(--container-pad);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.site-nav__link {
  position: relative;
  display: block;
  padding: .72rem 1.45rem;
  border-right: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: .96rem;
  letter-spacing: .05em;
  color: var(--ink-dim);
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur);
}
.site-nav__link:first-child { border-left: 1px solid var(--line); }
.site-nav__link:hover { color: var(--ink); }
.site-nav__link[aria-current="page"] { color: var(--green); }
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 1.45rem; right: 1.45rem; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--purple), var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease-out);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

body.nav-lock { overflow: hidden; }

/* ---------- 8. Footer ---------- */
.site-footer {
  position: relative;
  z-index: 0;
  margin-top: clamp(4rem, 8vw, 8rem);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #0B0D13, #07080C 60%);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--purple) 55%, var(--orange));
  opacity: .9;
}

.footer-top {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 48px var(--container-pad) 34px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: clamp(28px, 5vw, 64px);
}

.footer-brand { display: flex; flex-direction: column; gap: 14px; }
.brand--footer { align-items: flex-start; justify-self: start; }
.brand--footer .brand__name { font-size: clamp(1.4rem, 3vw, 1.9rem); }
.brand--footer .brand__slogan { font-size: .58rem; letter-spacing: .24em; }

.footer-trust {
  margin-top: 4px;
  padding-left: 14px;
  border-left: 2px solid rgba(139,92,246,.6);
  color: var(--ink-dim);
  font-size: .9rem;
  line-height: 1.7;
  max-width: 34em;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-style: normal;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--purple);
  margin-bottom: .8rem;
}
.footer-heading::before { content: "// "; color: var(--green); font-weight: 400; }

.footer-nav ul,
.footer-aside ul { display: grid; gap: .45rem; }
.footer-nav a,
.footer-aside a { color: var(--ink-dim); transition: color var(--dur), padding-left var(--dur); }
.footer-nav a:hover,
.footer-aside a:hover { color: var(--green); padding-left: 4px; }

.footer-contact { margin-top: 1rem; }
.footer-contact div { display: grid; grid-template-columns: 3.2em 1fr; gap: .4rem .7rem; }
.footer-contact dt { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); }
.footer-contact dd { font-size: .84rem; color: var(--ink-dim); }

.footer-bottom { border-top: 1px solid var(--line); padding: 18px var(--container-pad); }
.footer-bottom__inner {
  max-width: var(--container-w);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
}
.footer-copy { display: flex; flex-wrap: wrap; gap: 4px 14px; font-family: var(--font-mono); font-size: .72rem; color: var(--ink-faint); }
.footer-icp { color: var(--ink-faint); }
.footer-note { font-size: .78rem; color: var(--ink-faint); max-width: 46em; }

/* ---------- 9. Responsive ---------- */
@media (min-width: 861px) and (max-width: 1199px) {
  .masthead { padding-block: 14px; }
  .site-nav__link { padding: .68rem 1rem; font-size: .85rem; }
}

@media (max-width: 860px) {
  .masthead { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 8px; padding-block: 12px; }
  .masthead-meta { gap: 8px; }
  .masthead-clock { display: none; }
  .masthead-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .brand__name { font-size: clamp(1.28rem, 6vw, 1.6rem); letter-spacing: .04em; }
  .brand__slogan { display: none; }
  .brand__mark { width: 20px; height: 20px; }

  .site-nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: min(340px, 86vw);
    z-index: 400;
    padding: 96px 0 32px;
    background: linear-gradient(180deg, rgba(18,20,26,.98), rgba(10,11,15,.99));
    border-top: none;
    border-left: 1px solid var(--line);
    overflow-y: auto;
    transform: translateX(104%);
    visibility: hidden;
    transition: transform .42s var(--ease-out), visibility 0s linear .42s;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform .42s var(--ease-out), visibility 0s linear 0s;
    box-shadow: -28px 0 70px rgba(0,0,0,.55);
  }
  .site-nav__inner { flex-direction: column; padding: 0; }
  .site-nav__link {
    padding: 15px 28px;
    font-size: 1.12rem;
    border-right: none;
    border-left: none;
    border-bottom: 1px solid rgba(42,45,58,.55);
    transition: color var(--dur), background var(--dur);
  }
  .site-nav__link:first-child { border-top: 1px solid rgba(42,45,58,.55); }
  .site-nav__link:hover { background: rgba(57,255,136,.06); }
  .site-nav__link[aria-current="page"] { background: linear-gradient(90deg, rgba(139,92,246,.18), transparent); }
  .site-nav__link::after { left: 28px; right: 28px; }

  .footer-top { grid-template-columns: 1fr; padding-top: 36px; gap: 32px; }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .footer-note { margin-left: 0; }
}

@media (min-width: 861px) and (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 350;
  background: rgba(4,5,8,.66);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility 0s linear .35s;
}
.nav-backdrop[data-open] { opacity: 1; visibility: visible; transition: opacity .35s ease, visibility 0s linear 0s; }
@media (min-width: 861px) { .nav-backdrop { display: none; } }

/* ---------- 10. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}