/* ==========================================================================
   闲逸麻将馆 · 共享样式表 /assets/site.css
   牌桌 + 技术蓝图：极细边界、坐标网格、牌面卡片
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ivory:#F4EFE4;
  --paper:#EAE0CE;
  --bamboo:#3E6B58;
  --bamboo-deep:#24443A;
  --ink:#1A1A18;
  --cinnabar:#B23A2E;
  --gold:#C49A4A;
  --felt:#1F3A31;
  --mist:#7E8C82;
  --lamp:#E8C97A;

  --rail-w:240px;
  --rail-w-min:56px;

  --s1:8px;
  --s2:16px;
  --s3:24px;
  --s4:40px;
  --s5:64px;

  --line:rgba(62,107,88,.26);
  --line-strong:rgba(62,107,88,.52);
  --gold-line:rgba(196,154,74,.5);

  --ff-display:"Songti SC","STSong","SimSun","Source Han Serif SC","Noto Serif SC",serif;
  --ff-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --ff-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:320ms;
  --dur-fast:180ms;
}

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

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

body{
  margin:0;
  padding-left:var(--rail-w);
  background-color:var(--ivory);
  color:var(--ink);
  font-family:var(--ff-body);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  transition:padding-left var(--dur) var(--ease);
}

body[data-rail="open"]{padding-left:var(--rail-w)}
body[data-rail="closed"]{padding-left:var(--rail-w-min)}
body.is-locked{overflow:hidden}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:var(--bamboo);text-decoration:none}
a:hover{color:var(--cinnabar)}
strong,b{font-weight:700}
hr{border:0;border-top:1px solid var(--line);margin:var(--s3) 0}

:focus-visible{
  outline:2px solid var(--cinnabar);
  outline-offset:3px;
  border-radius:2px;
}
.rail :focus-visible{outline-color:var(--lamp)}

/* ---------- 3. 中文排版层级 ---------- */
.t-display{
  font-family:var(--ff-display);
  font-size:clamp(40px,6.4vw,72px);
  font-weight:700;
  line-height:1.16;
  letter-spacing:.04em;
  color:var(--ink);
}
.t-section{
  font-family:var(--ff-display);
  font-size:clamp(24px,3.2vw,32px);
  font-weight:700;
  line-height:1.38;
  letter-spacing:.05em;
  color:var(--ink);
}
.t-card{
  font-family:var(--ff-display);
  font-size:20px;
  font-weight:700;
  line-height:1.5;
  letter-spacing:.04em;
  color:var(--ink);
}
.t-body{font-size:16px;line-height:1.9;color:var(--ink)}
.t-note{font-size:14px;line-height:1.85;color:var(--mist)}
.t-mono{
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}
.t-vside{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--ff-mono);
  font-size:14px;
  letter-spacing:.3em;
  color:var(--mist);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:10px;
  top:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--cinnabar);
  color:var(--ivory);
  font-size:14px;
  letter-spacing:.08em;
  border-radius:3px;
  transform:translateY(-240%);
  transition:transform var(--dur-fast) var(--ease);
}
.skip-link:focus{
  transform:translateY(0);
  color:var(--ivory);
}

/* ---------- 5. 牌栏（共享头部） ---------- */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:60;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  background-color:var(--ivory);
  border-right:1px solid var(--line);
  overflow:hidden;
  transition:width var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.rail::after{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  right:4px;
  width:1px;
  background:var(--gold-line);
  pointer-events:none;
}

/* 收起按钮 */
.rail__toggle{
  flex:none;
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 16px;
  color:var(--mist);
  font-size:12px;
  letter-spacing:.16em;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
  transition:color var(--dur-fast) ease,background-color var(--dur-fast) ease;
}
.rail__toggle:hover{color:var(--bamboo-deep);background-color:var(--paper)}
.rail__toggle-glyph{
  flex:none;
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:16px;
  height:12px;
}
.rail__toggle-glyph i{
  display:block;
  height:1.5px;
  background:currentColor;
  transition:width var(--dur-fast) var(--ease);
}
.rail__toggle-glyph i:nth-child(2){width:68%}
.rail__toggle:hover .rail__toggle-glyph i:nth-child(2){width:100%}
.rail__toggle-text{white-space:nowrap}

/* 品牌区 */
.rail__brand{
  flex:none;
  display:flex;
  align-items:center;
  gap:12px;
  padding:20px 14px 16px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.rail__brand:hover{color:var(--ink)}
.rail__seal{
  flex:none;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  background:var(--bamboo);
  color:var(--ivory);
  font-family:var(--ff-display);
  font-size:21px;
  font-weight:700;
  border-radius:3px;
  box-shadow:inset 0 -2px 0 rgba(26,26,24,.22),0 1px 0 var(--gold-line);
  transition:background-color var(--dur) var(--ease),border-radius var(--dur) var(--ease);
}
.rail__brand:hover .rail__seal{background:var(--bamboo-deep);border-radius:10px}
.rail__brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
  transition:opacity var(--dur-fast) ease;
}
.rail__brand-name{
  font-family:var(--ff-display);
  font-size:18px;
  font-weight:700;
  line-height:1.45;
  letter-spacing:.08em;
  color:var(--ink);
  white-space:nowrap;
}
.rail__brand-note{
  font-size:11px;
  line-height:1.6;
  letter-spacing:.04em;
  color:var(--mist);
}

/* 坐标定位 */
.rail__coord{
  flex:none;
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border-bottom:1px solid var(--line);
  background:var(--paper);
  overflow:hidden;
}
.rail__coord-dot{
  flex:none;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--gold);
}
.rail__coord-text{
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--bamboo-deep);
  white-space:nowrap;
  transition:opacity var(--dur-fast) ease;
}

/* 栏目牌面索引 */
.rail__nav{
  flex:1 1 auto;
  overflow-y:auto;
  overflow-x:hidden;
  padding:10px 0 18px;
}
.rail__list{display:flex;flex-direction:column}
.rail__item{display:block}
.rail__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 16px 11px 13px;
  color:var(--ink);
  border-left:3px solid transparent;
  white-space:nowrap;
  transition:background-color var(--dur-fast) ease,
             border-color var(--dur-fast) ease,
             color var(--dur-fast) ease;
}
.rail__link:hover{
  background-color:var(--paper);
  border-left-color:var(--lamp);
  color:var(--bamboo-deep);
}
.rail__link[aria-current="page"]{
  background-color:var(--paper);
  border-left-color:var(--cinnabar);
  color:var(--cinnabar);
}
.rail__mark{
  flex:none;
  width:26px;
  height:26px;
  display:grid;
  place-items:center;
  font-family:var(--ff-mono);
  font-size:12px;
  color:var(--mist);
  border:1px solid var(--line);
  border-radius:3px;
  transition:border-color var(--dur-fast) ease,
             color var(--dur-fast) ease,
             background-color var(--dur-fast) ease;
}
.rail__link:hover .rail__mark{border-color:var(--gold-line);color:var(--bamboo-deep)}
.rail__link[aria-current="page"] .rail__mark{
  border-color:var(--cinnabar);
  color:var(--cinnabar);
  background-color:rgba(178,58,46,.08);
}
.rail__label{
  font-size:15px;
  letter-spacing:.05em;
  transition:opacity var(--dur-fast) ease;
}

/* 牌栏底 */
.rail__foot{
  flex:none;
  padding:16px;
  border-top:1px solid var(--line);
  transition:opacity var(--dur-fast) ease;
}
.rail__foot-note{
  font-size:12px;
  line-height:1.7;
  color:var(--mist);
  margin-bottom:10px;
}
.rail__cta{
  display:block;
  padding:10px 12px;
  text-align:center;
  background:var(--bamboo);
  color:var(--ivory);
  font-size:14px;
  letter-spacing:.1em;
  border-radius:3px;
  transition:background-color var(--dur-fast) ease,
             transform var(--dur-fast) var(--ease);
}
.rail__cta:hover{background:var(--cinnabar);color:var(--ivory);transform:translateY(-1px)}

/* 滚动进度 */
.rail__progress{
  position:absolute;
  left:0;
  top:0;
  z-index:2;
  width:3px;
  height:0;
  background:linear-gradient(180deg,var(--gold) 0%,var(--cinnabar) 100%);
  pointer-events:none;
  transition:height 90ms linear;
}

/* 收起状态（桌面 + 移动通用） */
.rail[data-open="false"]{width:var(--rail-w-min)}
.rail[data-open="false"] .rail__brand-text,
.rail[data-open="false"] .rail__coord-text,
.rail[data-open="false"] .rail__label,
.rail[data-open="false"] .rail__foot-note,
.rail[data-open="false"] .rail__cta,
.rail[data-open="false"] .rail__toggle-text{
  opacity:0;
  visibility:hidden;
  pointer-events:none;
}
.rail[data-open="false"] .rail__toggle{justify-content:center;padding:0;gap:0}
.rail[data-open="false"] .rail__brand{
  justify-content:center;
  gap:0;
  padding-left:0;
  padding-right:0;
}
.rail[data-open="false"] .rail__coord{justify-content:center;padding-left:0;padding-right:0}
.rail[data-open="false"] .rail__link{
  justify-content:center;
  gap:0;
  padding-left:0;
  padding-right:0;
  border-left-width:0;
  border-right:3px solid transparent;
}
.rail[data-open="false"] .rail__link:hover{border-right-color:var(--lamp)}
.rail[data-open="false"] .rail__link[aria-current="page"]{border-right-color:var(--cinnabar)}
.rail[data-open="false"] .rail__foot{
  opacity:0;
  visibility:hidden;
  pointer-events:none;
}

/* ---------- 6. 页脚 ---------- */
.foot{position:relative}

.foot__upper{
  background-color:var(--bamboo-deep);
  color:rgba(244,239,228,.86);
  padding:var(--s5) var(--s3) var(--s4);
}
.foot__grid{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(180px,1.1fr) minmax(0,1.6fr) minmax(240px,1.5fr);
  gap:var(--s4);
}
.foot__logo{
  font-family:var(--ff-display);
  font-size:26px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--ivory);
  line-height:1.4;
}
.foot__tag{
  margin-top:8px;
  font-size:13px;
  line-height:1.8;
  letter-spacing:.04em;
  color:rgba(244,239,228,.62);
}
.foot__stamp{
  margin-top:16px;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--gold);
}
.foot__title{
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--gold);
  margin-bottom:14px;
}
.foot__nav-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:6px 24px;
}
.foot__nav-list a{
  display:inline-block;
  padding:3px 0;
  font-size:14px;
  letter-spacing:.05em;
  color:rgba(244,239,228,.84);
  border-bottom:1px solid transparent;
  transition:color var(--dur-fast) ease,border-color var(--dur-fast) ease;
}
.foot__nav-list a:hover{
  color:var(--lamp);
  border-bottom-color:var(--lamp);
}
.foot__contact-list li{
  display:flex;
  gap:10px;
  font-size:13px;
  line-height:1.85;
  color:rgba(244,239,228,.78);
  margin-bottom:8px;
}
.foot__contact-k{
  flex:none;
  width:40px;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--gold);
  padding-top:3px;
}
.foot__contact-v{min-width:0;word-break:break-word}

.foot__mid{
  background-color:var(--paper);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:var(--s3) var(--s3);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:var(--s2) var(--s3);
}
.foot__quick,
.foot__legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 26px;
}
.foot__quick a,
.foot__legal a{
  position:relative;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--bamboo-deep);
  padding-bottom:3px;
}
.foot__quick a::after,
.foot__legal a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:var(--cinnabar);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur-fast) var(--ease);
}
.foot__quick a:hover,
.foot__legal a:hover{color:var(--cinnabar)}
.foot__quick a:hover::after,
.foot__legal a:hover::after{transform:scaleX(1)}
.foot__legal a{color:var(--mist);font-size:13px}

.foot__lower{
  background-color:var(--felt);
  padding:var(--s3) var(--s3);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px var(--s3);
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(244,239,228,.58);
}
.foot__copy,
.foot__icp{margin:0}

/* ---------- 7. 通用组件 ---------- */
.wrap{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding-left:var(--s3);
  padding-right:var(--s3);
}

.grid{display:grid;gap:var(--s3)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.coord-band{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 0;
  border-bottom:1px solid var(--line);
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
}
.coord-band::before{
  content:"";
  flex:none;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--gold);
}

.sec-rule{
  height:1px;
  background:var(--line);
  margin:var(--s3) 0;
}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:0 8px;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.crumbs > li{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.crumbs > li + li::before{
  content:"/";
  color:var(--gold);
}
.crumbs a{color:var(--mist)}
.crumbs a:hover{color:var(--cinnabar)}
.crumbs [aria-current="page"]{color:var(--bamboo-deep)}

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 22px;
  font-family:var(--ff-body);
  font-size:15px;
  letter-spacing:.1em;
  line-height:1.4;
  color:var(--bamboo-deep);
  background:transparent;
  border:1px solid var(--bamboo);
  border-radius:3px;
  transition:background-color var(--dur-fast) ease,
             color var(--dur-fast) ease,
             border-color var(--dur-fast) ease,
             transform var(--dur-fast) var(--ease);
}
.btn:hover{
  background:var(--bamboo);
  color:var(--ivory);
  transform:translateY(-1px);
}
.btn--solid{background:var(--bamboo);color:var(--ivory)}
.btn--solid:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:var(--ivory)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink)}
.btn--ghost:hover{background:var(--paper);color:var(--bamboo-deep);border-color:var(--bamboo)}

.card{
  position:relative;
  display:block;
  padding:var(--s3);
  background:var(--ivory);
  border:1px solid var(--line);
  border-radius:4px;
  box-shadow:0 1px 0 rgba(26,26,24,.03),0 10px 26px -20px rgba(26,26,24,.45);
  transition:transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.card:hover{
  transform:perspective(900px) rotateX(-2deg) translateY(-3px);
  border-color:var(--gold-line);
  box-shadow:0 2px 0 rgba(26,26,24,.04),0 24px 44px -28px rgba(26,26,24,.5);
}
.card--paper{background:var(--paper)}
.card--felt{background:var(--felt);border-color:rgba(196,154,74,.28);color:rgba(244,239,228,.86)}
.card--felt .t-card,
.card--felt .t-section{color:var(--ivory)}
.card--felt .t-note{color:rgba(244,239,228,.6)}
.card--flush{padding:0;overflow:hidden}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--bamboo-deep);
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
}
.tag--gold{color:#7C5F22;border-color:var(--gold-line);background:rgba(196,154,74,.14)}
.tag--cinnabar{color:var(--cinnabar);border-color:rgba(178,58,46,.4);background:rgba(178,58,46,.08)}

/* 图片容器（页面阶段投放图片） */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:3px;
}
.frame > img,
.frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.frame--16x9{aspect-ratio:16 / 9}
.frame--4x3{aspect-ratio:4 / 3}
.frame--3x2{aspect-ratio:3 / 2}
.frame--1x1{aspect-ratio:1 / 1}
.frame__slot{
  display:grid;
  place-items:center;
  min-height:160px;
  padding:var(--s3);
  text-align:center;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
  background-image:repeating-linear-gradient(135deg,rgba(62,107,88,.08) 0 1px,transparent 1px 10px);
}
.frame__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:10px 14px;
  font-size:12px;
  line-height:1.6;
  letter-spacing:.05em;
  color:rgba(244,239,228,.9);
  background:linear-gradient(180deg,rgba(31,58,49,0) 0%,rgba(31,58,49,.88) 100%);
}

/* ---------- 8. 断点 ---------- */
@media (max-width:1100px){
  .foot__grid{grid-template-columns:minmax(160px,1fr) minmax(0,1.4fr);gap:var(--s3)}
  .foot__contact{grid-column:1 / -1}
}

@media (max-width:900px){
  body,
  body[data-rail="open"]{padding-left:var(--rail-w-min)}

  .rail{width:var(--rail-w-min)}
  .rail[data-open="true"]{
    width:min(304px,84vw);
    box-shadow:24px 0 64px rgba(26,26,24,.3);
  }
  .rail[data-open="true"]::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    background:rgba(26,26,24,.42);
  }

  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}

  .foot__grid{grid-template-columns:1fr;gap:var(--s4)}
  .foot__contact{grid-column:auto}
  .foot__nav-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot__mid{flex-direction:column;align-items:flex-start}
  .foot__lower{justify-content:flex-start}
}

@media (max-width:640px){
  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr)}
  .grid--12{grid-template-columns:repeat(4,minmax(0,1fr))}

  .t-display{font-size:clamp(34px,10vw,48px)}
  .foot__upper{padding:var(--s4) var(--s2) var(--s3)}
  .foot__mid,
  .foot__lower{padding:var(--s3) var(--s2)}
  .foot__quick,
  .foot__legal{gap:8px 18px}
  .btn{width:100%;justify-content:center}
}

/* ---------- 9. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  body{transition:none}
  .card:hover{transform:none;box-shadow:0 1px 0 rgba(26,26,24,.03)}
  .btn:hover,
  .rail__cta:hover{transform:none}
  .rail__brand:hover .rail__seal{border-radius:3px}
  .rail__progress{transition:none}
  .foot__quick a::after,
  .foot__legal a::after{transition:none}
}