/* ==========================================================================
   艾弗森娱乐会馆 · 共享样式 /assets/site.css
   轨道头部 + 更衣室页脚 + 通用组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dt, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
address { font-style: normal; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink: #0B0B0C;
  --locker: #1A1B1E;
  --silver: #C9CCD1;
  --white: #F5F6F7;
  --red: #D6293A;
  --red-bright: #EF3547;
  --orange: #F0701E;
  --green: #16352C;
  --paper: #E8DFC8;
  --glass: rgba(255, 255, 255, 0.08);
  --stat: #6E7378;
  --board: #3A3D42;
  --ink-soft: #1C1D20;

  --font-display: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --rail-w: 88px;
  --topbar-h: 60px;
  --maxw: 1280px;
  --gut: clamp(18px, 4vw, 56px);
  --radius: 4px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.24s;
}

/* ---------- 3. 中文排版与页面底色 ---------- */
body {
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

@media (min-width: 900px) { body { padding-left: var(--rail-w); } }
@media (max-width: 899px) { body { padding-top: var(--topbar-h); } }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  color: #fff;
}
h1 { font-size: clamp(30px, 4.6vw, 56px); font-style: italic; font-weight: 900; letter-spacing: -0.015em; }
h2 { font-size: clamp(24px, 3.2vw, 38px); font-style: italic; font-weight: 900; letter-spacing: -0.01em; }
h3 { font-size: clamp(18px, 2vw, 22px); letter-spacing: 0.005em; }
h4 { font-size: 16px; letter-spacing: 0.01em; }
p { line-height: 1.75; }

.idx,
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stat);
  font-variant-numeric: tabular-nums;
}

::selection { background: var(--red); color: #fff; }

/* ---------- 4. 布局基础 ---------- */
.wrap {
  width: min(100% - 2 * var(--gut), var(--maxw));
  margin-inline: auto;
}
.section { padding-block: clamp(48px, 7vw, 88px); }

.grid { display: grid; gap: clamp(16px, 2vw, 26px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--12 > .span-3 { grid-column: span 3; }
.grid--12 > .span-4 { grid-column: span 4; }
.grid--12 > .span-5 { grid-column: span 5; }
.grid--12 > .span-6 { grid-column: span 6; }
.grid--12 > .span-7 { grid-column: span 7; }
.grid--12 > .span-8 { grid-column: span 8; }
.grid--12 > .span-9 { grid-column: span 9; }
.grid--12 > .span-12 { grid-column: span 12; }

@media (max-width: 899px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid--12 > [class*="span-"] { grid-column: span 6; }
}
@media (max-width: 599px) {
  .grid--12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--12 > [class*="span-"] { grid-column: 1 / -1; }
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: clamp(24px, 3vw, 40px);
}
.section-head p { max-width: 62ch; color: var(--stat); }

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose a { color: var(--orange); text-decoration: underline; text-underline-offset: 3px; }

/* 冷白实色内容层 */
.slab { background: var(--white); color: var(--ink-soft); }
.slab h1, .slab h2, .slab h3, .slab h4 { color: var(--ink); }
.slab .idx, .slab .mono { color: #7C8288; }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 12px;
  z-index: 200;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 6. 侧边轨道头部 ---------- */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 120;
  background: linear-gradient(180deg, #0B0B0C 0%, #131417 52%, #0B0B0C 100%);
  border-right: 1px solid var(--board);
  display: flex;
  flex-direction: column;
}

.rail__bar {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 26px;
}

.rail__brand { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.rail__brand-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  background: var(--red);
  padding: 6px 8px;
  border-radius: 2px;
  transform: skewX(-7deg);
  line-height: 1;
}

.rail__brand-name {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--stat);
  writing-mode: vertical-rl;
  line-height: 1;
}

.rail__toggle {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  color: var(--silver);
  border-top: 1px solid rgba(58, 61, 66, 0.65);
  border-bottom: 1px solid rgba(58, 61, 66, 0.65);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.rail__toggle:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }

.rail__toggle-box { position: relative; display: block; width: 22px; height: 14px; }
.rail__toggle-box i {
  position: absolute;
  left: 0;
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}
.rail__toggle-box i:nth-child(1) { top: 0; }
.rail__toggle-box i:nth-child(2) { top: 6px; width: 68%; background: var(--red); }
.rail__toggle-box i:nth-child(3) { top: 12px; }

.rail[data-open="true"] .rail__toggle-box i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.rail[data-open="true"] .rail__toggle-box i:nth-child(2) { opacity: 0; }
.rail[data-open="true"] .rail__toggle-box i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.rail__toggle-text {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
}

.rail__progress {
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 100%;
  background: var(--red);
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
  transition: transform 0.1s linear;
  pointer-events: none;
}

/* 导航面板 */
.rail-nav {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  bottom: 0;
  width: 352px;
  z-index: 119;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 34px 26px 28px;
  overflow-y: auto;
  background: rgba(15, 16, 18, 0.94);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-right: 1px solid var(--board);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-14px);
  transition: opacity 0.2s var(--ease), transform 0.24s var(--ease), visibility 0.24s;
}
.rail[data-open="true"] .rail-nav { opacity: 1; visibility: visible; transform: none; }

.rail-nav__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--stat);
  text-transform: uppercase;
}

.rail-nav__list { display: flex; flex-direction: column; }
.rail-nav__list li { border-bottom: 1px solid rgba(58, 61, 66, 0.55); }

.rail-nav__link {
  position: relative;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 14px 10px 14px 14px;
  font-size: 15px;
  color: var(--silver);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), padding-left 0.18s var(--ease);
}
.rail-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  background: var(--red);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.2s var(--ease);
}
.rail-nav__link:hover,
.rail-nav__link:focus-visible { color: #fff; background: rgba(255, 255, 255, 0.05); padding-left: 18px; }
.rail-nav__link:hover::before { transform: scaleY(1); }

.rail-nav__link[aria-current="page"] {
  color: #fff;
  background: rgba(214, 41, 58, 0.14);
}
.rail-nav__link[aria-current="page"]::before { transform: scaleY(1); }
.rail-nav__link[aria-current="page"] .rail-nav__idx { color: var(--orange); }

.rail-nav__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stat);
  font-variant-numeric: tabular-nums;
}
.rail-nav__lbl { line-height: 1.35; }

.rail-nav__panel { display: flex; flex-direction: column; gap: 10px; }

.rail-nav__foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid rgba(58, 61, 66, 0.55);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail-nav__mail {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver);
  word-break: break-all;
}
.rail-nav__utility { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; }
.rail-nav__utility a { color: var(--stat); }
.rail-nav__utility a:hover { color: var(--orange); }

/* ---------- 7. 按钮 / 标签 / 卡片 / 玻璃 / 图片容器 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 3px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--brand { background: var(--red); color: #fff; }
.btn--brand:hover { background: var(--red-bright); }
.btn--ghost { border-color: var(--board); color: var(--silver); }
.btn--ghost:hover { border-color: var(--silver); color: #fff; background: rgba(255, 255, 255, 0.06); }
.btn--light { background: var(--white); color: var(--ink); }
.btn--light:hover { background: #fff; }
.btn--block { width: 100%; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 2px;
  border: 1px solid var(--board);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver);
  line-height: 1.6;
}
.tag--orange { border-color: rgba(240, 112, 30, 0.5); color: var(--orange); }
.tag--red { border-color: rgba(214, 41, 58, 0.55); color: #FF6A78; }

.plate {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stat);
}
.plate::before { content: ""; width: 22px; height: 2px; background: var(--red); }

.glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
}

.card {
  background: var(--locker);
  border: 1px solid var(--board);
  border-radius: var(--radius);
  padding: clamp(18px, 2vw, 26px);
}
.card--paper { background: var(--paper); border-color: #CFC4A6; color: var(--ink-soft); }
.card--paper h3, .card--paper h4 { color: var(--ink); }
.card--green { background: var(--green); border-color: #1F4A3D; }

.frame {
  position: relative;
  overflow: hidden;
  background: var(--locker);
  border: 1px solid var(--board);
  border-radius: var(--radius);
}
.frame > img { width: 100%; height: 100%; object-fit: cover; }
.frame--wide { aspect-ratio: 16 / 9; }
.frame--photo { aspect-ratio: 4 / 3; }
.frame--square { aspect-ratio: 1 / 1; }
.frame--tall { aspect-ratio: 3 / 4; }
.frame--auto { aspect-ratio: auto; }

.frame__ph {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(135deg, rgba(58, 61, 66, 0.35) 0 2px, transparent 2px 12px),
    radial-gradient(120% 90% at 18% 8%, rgba(240, 112, 30, 0.16), transparent 60%),
    radial-gradient(90% 80% at 92% 96%, rgba(214, 41, 58, 0.14), transparent 62%),
    #131417;
}

.frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 30px 14px 10px;
  background: linear-gradient(0deg, rgba(11, 11, 12, 0.9), rgba(11, 11, 12, 0));
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--silver);
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stat);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--board); }
.crumbs a { color: var(--stat); }
.crumbs a:hover { color: var(--orange); }
.crumbs [aria-current="page"] { color: var(--silver); }

/* ---------- 8. 页脚 ---------- */
.board {
  position: relative;
  margin-top: clamp(56px, 8vw, 104px);
  color: var(--silver);
  border-top: 1px solid var(--board);
  background:
    radial-gradient(140% 110% at 0% 0%, rgba(22, 53, 44, 0.92) 0%, rgba(11, 11, 12, 1) 64%),
    var(--ink);
}

.board__tape {
  height: 6px;
  background: linear-gradient(90deg,
    var(--red) 0 22%,
    var(--orange) 22% 28%,
    var(--board) 28% 100%);
}

.board__inner {
  width: min(100% - 2 * var(--gut), var(--maxw));
  margin-inline: auto;
  padding-block: clamp(40px, 6vw, 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 56px);
}

.board__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--stat);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.board__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: #fff;
}
.board__closing { margin-top: 12px; font-size: 16px; color: var(--paper); }
.board__brandline {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--stat);
}
.board__cta { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; }

.board__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.board__col h3,
.board__contact h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--orange);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.board__col li + li { margin-top: 9px; }
.board__col a {
  position: relative;
  display: inline-block;
  font-size: 15px;
  color: var(--silver);
  transition: color 0.18s var(--ease);
}
.board__col a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--red);
  transition: width 0.2s var(--ease);
}
.board__col a:hover { color: #fff; }
.board__col a:hover::after { width: 100%; }

.board__contact ul { display: flex; flex-direction: column; gap: 12px; }
.board__contact li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.65;
}
.board__contact .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stat);
  padding-top: 3px;
}
.board__contact .v { color: var(--silver); }
.board__note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--stat);
}

.board__legal {
  width: min(100% - 2 * var(--gut), var(--maxw));
  margin-inline: auto;
  border-top: 1px solid rgba(58, 61, 66, 0.7);
  padding: 20px 0 34px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stat);
}
.board__legal-links { display: flex; flex-wrap: wrap; gap: 18px; }
.board__legal-links a:hover { color: var(--orange); }

@media (max-width: 1080px) {
  .board__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); }
  .board__contact { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .board__inner { grid-template-columns: minmax(0, 1fr); }
  .board__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 460px) {
  .board__cols { grid-template-columns: minmax(0, 1fr); }
  .board__legal { justify-content: flex-start; }
}

/* ---------- 9. 移动端：轨道变顶栏，导航变抽屉 ---------- */
@media (max-width: 899px) {
  :root { --rail-w: 0px; }

  .rail {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--topbar-h);
    flex-direction: row;
    border-right: 0;
    border-bottom: 1px solid var(--board);
    background: rgba(11, 11, 12, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }

  .rail__bar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0 18px;
  }

  .rail__brand { flex-direction: row; align-items: center; gap: 10px; }
  .rail__brand-name {
    writing-mode: horizontal-tb;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--silver);
  }

  .rail__toggle {
    width: auto;
    flex-direction: row;
    gap: 10px;
    padding: 8px 0;
    border-top: 0;
    border-bottom: 0;
  }
  .rail__toggle-text { writing-mode: horizontal-tb; font-size: 11px; letter-spacing: 0.2em; }

  .rail__progress {
    top: auto;
    left: 0;
    right: 0;
    bottom: -1px;
    width: 100%;
    height: 3px;
    transform: scaleX(var(--p, 0));
    transform-origin: left center;
  }

  .rail-nav {
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    border-right: 0;
    border-top: 1px solid var(--board);
    padding: 26px 20px 32px;
    transform: translateY(-10px);
  }
  .rail[data-open="true"] .rail-nav { transform: none; }
}

/* ---------- 10. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transition-delay: calc(var(--i, 0) * 60ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 11. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 2px;
}
.slab :focus-visible { outline-color: var(--red); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .rail__progress { transition: none !important; }
}