/* ============================================================
   77棋牌电玩 · 全站共享样式 /assets/site.css
   深墨绿夜色 + 暖金强调 + 霓虹青信号 + 珊瑚红提醒
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --ink-900: #0A1F1A;
  --ink-800: #0E2B24;
  --ink-700: #173D33;
  --gold: #E3B45C;
  --gold-soft: #F2D79B;
  --cyan: #4FE0C8;
  --coral: #FF6B5A;
  --paper: #F4EFE4;
  --paper-deep: #E7DFCE;
  --ink-text: #101815;
  --grey: #6E857C;
  --white: #F7FBF9;
  --line: rgba(247, 251, 249, 0.14);
  --line-strong: rgba(79, 224, 200, 0.28);

  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --pill: 999px;

  --tracking: 0.18em;
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --glow-gold: 0 24px 70px -40px rgba(227, 180, 92, 0.55);
  --shadow-deep: 0 30px 70px -45px rgba(0, 0, 0, 0.95);

  --gutter: clamp(1rem, 4vw, 2.5rem);
  --measure: 40ch;
}

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

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

body {
  margin: 0;
  background-color: var(--ink-800);
  background-image:
    radial-gradient(120% 80% at 8% -10%, rgba(23, 61, 51, 0.85) 0%, rgba(14, 43, 36, 0) 60%),
    radial-gradient(90% 70% at 105% 5%, rgba(79, 224, 200, 0.09) 0%, rgba(14, 43, 36, 0) 55%);
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: var(--cyan); text-decoration: none; transition: color 0.18s ease-out; }
a:hover { color: var(--gold-soft); }

h1, h2, h3, h4 {
  margin: 0 0 0.55em;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

p { margin: 0 0 1em; max-width: 62ch; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
li { margin-bottom: 0.35em; }
button { font: inherit; color: inherit; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 999;
  padding: 0.6rem 1.1rem;
  border-radius: var(--pill);
  background: var(--gold);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 0.9rem;
  transition: top 0.18s ease-out;
}
.skip-link:focus { top: 1rem; color: var(--ink-900); }

/* ---------- 布局基础 ---------- */
.container {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin-inline: auto;
}

.container--narrow { max-width: 820px; }

.section { padding: clamp(2.8rem, 7vw, 5.5rem) 0; }
.section--tight { padding: clamp(1.8rem, 4vw, 3rem) 0; }

.section--paper {
  --line: rgba(16, 24, 21, 0.14);
  background: var(--paper);
  color: var(--ink-text);
  border-radius: var(--radius-xl);
  padding-inline: var(--gutter);
  margin: 0 auto;
  width: min(100% - (var(--gutter) * 2), 1340px);
}
.section--paper a { color: #15624F; }
.section--paper a:hover { color: #B37F1E; }
.section--paper h2, .section--paper h3 { color: var(--ink-text); }

.section--seam {
  background: linear-gradient(180deg, rgba(10, 31, 26, 0) 0%, rgba(10, 31, 26, 0.75) 45%, rgba(10, 31, 26, 0) 100%);
}

/* ---------- 排版元素 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 6.4vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
  margin: 0 0 0.4em;
}

.display--page { font-size: clamp(2rem, 4.4vw, 2.9rem); }

.display__cut {
  display: inline-block;
  padding: 0.04em 0.3em 0.12em;
  background: linear-gradient(125deg, var(--gold-soft) 0%, var(--gold) 62%, #C8933C 100%);
  color: var(--ink-900);
  border-radius: 6px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8% 100%, 0 74%);
  box-shadow: var(--glow-gold);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: var(--tracking);
  color: var(--gold);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.lede {
  font-size: clamp(1.02rem, 1.6vw, 1.15rem);
  color: rgba(247, 251, 249, 0.82);
  max-width: var(--measure);
}
.section--paper .lede { color: rgba(16, 24, 21, 0.78); }

.v-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.78rem;
  letter-spacing: var(--tracking);
  color: var(--grey);
  text-transform: uppercase;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 分屏与网格 ---------- */
.split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); align-items: start; }
  .split--wide-left { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
  .split--even { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.6vw, 1.75rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}
.grid--masonry { align-items: start; }
.grid--masonry > *:nth-child(3n + 1) { transform: translateY(0); }
@media (min-width: 900px) {
  .grid--masonry > *:nth-child(3n + 2) { transform: translateY(1.75rem); }
  .grid--masonry > *:nth-child(3n + 3) { transform: translateY(-1rem); }
}

.stack > * + * { margin-top: 1rem; }

/* ---------- 按钮与胶囊 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.2s ease-out, color 0.2s ease-out, border-color 0.2s ease-out, transform 0.2s ease-out;
}
.btn:active { transform: translateY(1px); }

.btn--gold { background: var(--gold); color: #14261F; }
.btn--gold:hover { background: var(--gold-soft); color: #14261F; }

.btn--ghost {
  background: rgba(79, 224, 200, 0.07);
  border-color: rgba(79, 224, 200, 0.42);
  color: var(--cyan);
}
.btn--ghost:hover { background: rgba(79, 224, 200, 0.18); color: #D9FFF6; }

.btn--quiet {
  background: transparent;
  border-color: var(--line);
  color: rgba(247, 251, 249, 0.8);
}
.btn--quiet:hover { border-color: var(--gold); color: var(--gold-soft); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.8rem;
  border: 1px solid rgba(79, 224, 200, 0.38);
  border-radius: var(--pill);
  background: rgba(79, 224, 200, 0.08);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.pill--gold { border-color: rgba(227, 180, 92, 0.45); background: rgba(227, 180, 92, 0.1); color: var(--gold); }
.pill--coral { border-color: rgba(255, 107, 90, 0.5); background: rgba(255, 107, 90, 0.12); color: var(--coral); }
.pill--paper { border-color: rgba(16, 24, 21, 0.2); background: rgba(16, 24, 21, 0.06); color: var(--ink-700); }

/* ---------- 内容块 ---------- */
.card {
  background: linear-gradient(158deg, rgba(23, 61, 51, 0.92) 0%, rgba(14, 43, 36, 0.94) 100%);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: clamp(1.15rem, 3vw, 1.75rem);
  box-shadow: var(--shadow-deep);
}
.card--paper {
  background: var(--paper);
  border-color: rgba(16, 24, 21, 0.12);
  color: var(--ink-text);
}
.card--paper a { color: #15624F; }

.panel {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(10, 31, 26, 0.55);
  overflow: hidden;
}
.panel + .panel { margin-top: 0.6rem; }
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 0.95rem 1.15rem;
  background: transparent;
  border: 0;
  text-align: left;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}
.panel__head:hover { background: rgba(227, 180, 92, 0.1); color: var(--gold-soft); }
.panel__body { padding: 0 1.15rem 1.1rem; color: rgba(247, 251, 249, 0.82); }
.panel__body > *:last-child { margin-bottom: 0; }

.rail {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.rail__item {
  position: relative;
  padding: 0 0 1.75rem 2.4rem;
}
.rail__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 1.4rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(227, 180, 92, 0.6), rgba(79, 224, 200, 0.18));
}
.rail__item:last-child::before { display: none; }
.rail__step {
  position: absolute;
  left: 0;
  top: 0.15rem;
  display: grid;
  place-items: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink-800);
  font-size: 0;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding: 1rem 0 0;
  font-size: 0.82rem;
  color: var(--grey);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs li { margin: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.4rem; color: rgba(110, 133, 124, 0.6); }
.breadcrumbs a { color: rgba(247, 251, 249, 0.7); }
.breadcrumbs a:hover { color: var(--gold-soft); }
.breadcrumbs [aria-current="page"] { color: var(--gold); }

/* ---------- 媒体容器 ---------- */
.media {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: radial-gradient(130% 120% at 18% 0%, #1E4B3F 0%, #123329 48%, #0A1F1A 100%);
  box-shadow: inset 0 0 0 1px rgba(79, 224, 200, 0.16), var(--shadow-deep);
}
.media > img,
.media > picture > img,
.media > svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(227, 180, 92, 0.16) 0%, rgba(227, 180, 92, 0) 46%);
  pointer-events: none;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media__caption {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  z-index: 1;
  padding: 0.28rem 0.75rem;
  border-radius: var(--pill);
  background: rgba(10, 31, 26, 0.78);
  color: var(--gold-soft);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
.data-table caption {
  text-align: left;
  padding-bottom: 0.6rem;
  font-size: 0.75rem;
  letter-spacing: var(--tracking);
  color: var(--grey);
}
.data-table th,
.data-table td {
  padding: 0.72rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.data-table th {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--grey);
  text-transform: uppercase;
}
.data-table tbody tr:hover { background: rgba(227, 180, 92, 0.07); }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-900);
  border-bottom: 1px solid rgba(79, 224, 200, 0.16);
  box-shadow: 0 18px 40px -32px rgba(0, 0, 0, 1);
}

.header-top {
  background: linear-gradient(96deg, #0A1F1A 0%, #123329 52%, #0A1F1A 100%);
}

.header-top__inner {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.brand-mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--gold-soft) 0%, var(--gold) 55%, #B9863A 100%);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 74%, 76% 100%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
}
.brand-name:hover { color: var(--gold-soft); }

.brand-tag {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--grey);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: none;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--pill);
  border: 1px solid rgba(227, 180, 92, 0.45);
  background: rgba(227, 180, 92, 0.1);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
}
.nav-toggle:hover { background: rgba(227, 180, 92, 0.2); }
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s ease-out, opacity 0.22s ease-out;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { letter-spacing: 0.06em; }

/* 栏目轨道 */
.header-rail {
  background: rgba(10, 31, 26, 0.72);
  border-top: 1px solid rgba(79, 224, 200, 0.1);
}

.nav-track {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin-inline: auto;
  padding: 0.42rem 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-track::-webkit-scrollbar { display: none; }
.nav-track > li { margin: 0; flex: none; }

.nav-link {
  display: block;
  padding: 0.5rem 0.95rem;
  border-radius: var(--pill);
  color: rgba(247, 251, 249, 0.74);
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.18s ease-out, color 0.18s ease-out;
}
.nav-link:hover { background: rgba(227, 180, 92, 0.12); color: var(--gold-soft); }
.nav-link[aria-current="page"] {
  background: var(--gold);
  color: var(--ink-900);
  font-weight: 700;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--ink-900);
  border-top: 1px solid rgba(227, 180, 92, 0.2);
  color: rgba(247, 251, 249, 0.78);
}

.footer-inner {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4rem) 0 1.75rem;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 900px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr); }
}

.footer-brand { position: relative; }
.footer-brand__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--gold-soft);
}
.footer-brand__sub {
  margin: 0;
  max-width: 34ch;
  font-size: 0.9rem;
  color: rgba(247, 251, 249, 0.66);
}
.footer-brand__mark {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(227, 180, 92, 0.55);
  letter-spacing: 0.06em;
}

.footer-cols {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}
.footer-col__title {
  margin: 0 0 0.7rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: var(--tracking);
  color: var(--gold);
  text-transform: uppercase;
}
.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}
.footer-list li { margin-bottom: 0.45rem; }
.footer-list a { color: rgba(247, 251, 249, 0.74); }
.footer-list a:hover { color: var(--gold-soft); }
.footer-list--plain li { color: rgba(247, 251, 249, 0.66); }

.footer-bottom {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin-inline: auto;
  padding: 1rem 0;
  border-top: 1px solid rgba(247, 251, 249, 0.1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--grey);
}
.footer-bottom p { margin: 0; max-width: none; }
.footer-legal { letter-spacing: 0.02em; }
.footer-copy { font-family: var(--font-mono); }

.footer-note {
  width: min(100% - (var(--gutter) * 2), 1240px);
  margin: 0 auto;
  padding: 0 0 2rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(110, 133, 124, 0.92);
  max-width: none;
}

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  will-change: opacity, transform;
}
[data-reveal][data-visible] { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  body { font-size: 16px; }
  .brand-tag { display: none; }
  .nav-toggle { display: inline-flex; }

  .header-rail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.28s ease-out;
  }
  .header-rail[data-open] {
    max-height: 72vh;
    overflow-y: auto;
  }
  .nav-track {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    width: min(100% - 2rem, 1240px);
    padding: 0.5rem 0 1rem;
    overflow: visible;
  }
  .nav-link {
    border-radius: var(--radius-md);
    padding: 0.72rem 1rem;
    border: 1px solid transparent;
  }
  .nav-link[aria-current="page"] { border-color: rgba(227, 180, 92, 0.6); }

  .header-actions .btn--ghost { display: none; }
}

@media (max-width: 560px) {
  .header-actions { gap: 0.35rem; }
  .btn { padding: 0.5rem 0.85rem; font-size: 0.84rem; }
  .brand-mark { width: 38px; height: 38px; border-radius: 12px; font-size: 0.9rem; }
  .brand-name { font-size: 0.98rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 901px) {
  .nav-toggle { display: none; }
}

/* ---------- 无障碍与降级 ---------- */
@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 !important; transform: none !important; }
}

@media print {
  .site-header, .site-footer, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}