/* ==========================================================================
   九博娱乐 · 共享外壳与通用组件
   文件：/assets/site.css
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --abyss: #0A1526;
  --deck: #12233D;
  --line: #1E3A5F;
  --paper: #EDE7DA;
  --mute: #9FB0C4;
  --gold: #C9A24B;
  --gold-lit: #E8C97A;
  --neon: #35D6D0;
  --neon-deep: #0F6E6B;
  --cinnabar: #D0382F;
  --sheet: #F4F1EA;

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

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 56px);
  --cut: 14px;
  --cut-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  --ease: cubic-bezier(.22, .7, .3, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd { margin: 0; }

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

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

button, input, select, textarea { font: inherit; color: inherit; }

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

a { color: inherit; text-decoration: none; transition: color .2s ease; }

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

/* ---------- 3. 基础排版与底色 ---------- */
body {
  min-height: 100vh;
  background-color: var(--abyss);
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 58, 95, .55) 0 1px, transparent 1px 92px),
    radial-gradient(1100px 620px at 88% -6%, rgba(53, 214, 208, .08), transparent 62%),
    radial-gradient(880px 520px at 2% 96%, rgba(201, 162, 75, .07), transparent 60%);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(53, 214, 208, .28); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 4px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

#main-content { padding-bottom: clamp(56px, 9vw, 110px); }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 50%;
  z-index: 900;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--gold);
  color: var(--abyss);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  transform: translate(-50%, -220%);
  transition: transform .24s var(--ease);
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 5. 悬浮头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  padding: 14px var(--gutter);
  transition: padding .3s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 21, 38, .97) 0%, rgba(10, 21, 38, .78) 58%, rgba(10, 21, 38, 0) 100%);
  opacity: 0;
  transition: opacity .3s ease;
}

.site-header[data-scrolled]::before { opacity: 1; }

.site-header[data-scrolled] {
  padding-top: 8px;
  padding-bottom: 8px;
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--shell);
  margin: 0 auto;
}

/* 品牌胶囊 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  margin-right: auto;
  padding: 8px 20px 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 35, 61, .88);
  transition: border-color .22s ease, background .22s ease;
}

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

.brand-sigil {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  background: var(--gold);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.brand-sigil::after {
  content: "";
  position: absolute;
  inset: 2px;
  background:
    radial-gradient(circle at 50% 50%, var(--neon) 0 2px, transparent 2.6px),
    var(--abyss);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.brand-words {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  letter-spacing: .08em;
  color: var(--paper);
}

.brand-line {
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--mute);
}

/* 栏目胶囊 */
.site-nav {
  display: flex;
  align-items: center;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 35, 61, .74);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--mute);
  white-space: nowrap;
  transition: color .2s ease, background .2s ease;
}

.nav-list a:hover {
  color: var(--paper);
  background: rgba(30, 58, 95, .75);
}

.nav-list a[aria-current="page"] {
  color: var(--gold-lit);
  background: rgba(201, 162, 75, .13);
}

.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 35, 61, .88);
  color: var(--paper);
  transition: border-color .22s ease;
}

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

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars .bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--gold);
  transition: transform .22s var(--ease);
}

.nav-toggle[aria-expanded="true"] .bar:first-child { transform: translateY(2.75px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:last-child  { transform: translateY(-2.75px) rotate(-45deg); }

.nav-toggle-label {
  font-size: 12px;
  letter-spacing: .18em;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(40px, 7vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 35, 61, .5) 0%, rgba(10, 21, 38, .98) 100%);
}

/* 6.1 记录带 */
.footer-band {
  border-bottom: 1px solid var(--line);
  background: rgba(18, 35, 61, .72);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  -webkit-overflow-scrolling: touch;
}

.footer-band::-webkit-scrollbar { height: 6px; }
.footer-band::-webkit-scrollbar-track { background: transparent; }
.footer-band::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }

.band-track {
  display: flex;
  align-items: stretch;
  width: max-content;
  min-width: 100%;
  padding: 0 var(--gutter);
}

.band-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 20px;
  border-right: 1px solid rgba(30, 58, 95, .8);
  scroll-snap-align: start;
  white-space: nowrap;
}

.band-num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.band-bar {
  display: block;
  width: 26px;
  height: 1px;
  background: rgba(159, 176, 196, .45);
}

.band-cell--update {
  gap: 9px;
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--cinnabar);
  border-right: 0;
}

.band-mark {
  display: block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(208, 56, 47, .16);
}

/* 6.2 主体 */
.footer-body {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
  grid-template-columns: minmax(200px, 1fr) minmax(0, 2.6fr);
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(38px, 5vw, 64px) var(--gutter) clamp(24px, 3vw, 38px);
}

.footer-wordmark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: .06em;
  color: var(--paper);
}

.footer-tagline {
  margin-top: 8px;
  font-size: 13.5px;
  letter-spacing: .06em;
  color: var(--gold);
}

.footer-note {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--mute);
}

.footer-cols {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--gold);
}

.footer-links { display: grid; gap: 10px; }

.footer-links a {
  font-size: 14px;
  color: var(--mute);
  transition: color .2s ease, padding-left .2s ease;
}

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

.footer-lines { display: grid; gap: 12px; }

.footer-lines li { font-size: 12.5px; line-height: 1.7; }

.footer-label {
  display: block;
  margin-bottom: 3px;
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--mute);
}

.footer-value {
  color: var(--paper);
  font-size: 13px;
  word-break: break-all;
}

/* 6.3 法务行 */
.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid rgba(30, 58, 95, .8);
}

.footer-legal,
.footer-year {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mute);
}

/* ---------- 7. 通用布局与组件 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mute);
}

.kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--paper);
}

.prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.9;
  color: var(--paper);
}

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

.prose a {
  color: var(--neon);
  border-bottom: 1px solid rgba(53, 214, 208, .4);
}

.prose a:hover { border-bottom-color: var(--neon); }

/* 切角档案面板 */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--line);
  background: var(--deck);
  clip-path: var(--cut-path);
  transition: border-color .22s ease;
}

.panel:hover { border-color: var(--neon); }

/* 图片容器（页面阶段放置图片或内联 SVG） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(201, 162, 75, .35);
  background: var(--deck);
  clip-path: var(--cut-path);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(10, 21, 38, .18), rgba(10, 21, 38, .38)),
    repeating-linear-gradient(4deg, rgba(159, 176, 196, .06) 0 1px, transparent 1px 7px);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 26px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  background: transparent;
  color: var(--gold-lit);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .14em;
  transition: background .22s ease, color .22s ease, border-color .22s ease, transform .22s var(--ease);
}

.btn:hover {
  background: rgba(201, 162, 75, .14);
  border-color: var(--gold-lit);
  transform: translateY(-2px);
}

.btn--solid {
  background: var(--gold);
  color: var(--abyss);
}

.btn--solid:hover {
  background: var(--gold-lit);
  border-color: var(--gold-lit);
  color: var(--abyss);
}

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

.btn--ghost:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(53, 214, 208, .08);
}

/* 面包屑 */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mute);
}

.crumb a { color: var(--mute); }
.crumb a:hover { color: var(--neon); }

.crumb-sep {
  color: var(--line);
  user-select: none;
}

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

/* 页面内主题筛选 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mute);
  font-size: 13px;
  letter-spacing: .1em;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

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

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

.is-filtered-out { display: none !important; }

/* ---------- 8. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s var(--ease);
}

[data-reveal][data-visible] {
  opacity: 1;
  transform: none;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-body { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 20px;
    background: rgba(10, 21, 38, .98);
    box-shadow: 0 26px 60px rgba(0, 0, 0, .55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s var(--ease), visibility .22s;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list a {
    padding: 12px 15px;
    font-size: 16px;
  }

  .nav-list a[aria-current="page"]::after {
    left: 15px;
    right: auto;
    bottom: 7px;
    width: 18px;
  }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .brand-line { display: none; }
  .brand { padding: 8px 16px 8px 12px; }
  .brand-name { font-size: 15px; }

  .band-cell { padding: 13px 16px; }
}

@media (max-width: 560px) {
  .footer-cols { grid-template-columns: 1fr; gap: 26px; }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 10. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover { transform: none; }
}