/* ==========================================================================
   杏运主站 · 共享样式表 /assets/site.css
   深夜牌桌：暗场基底 + 杏果橙金识别 + 荧光青关键数值
   ========================================================================== */

:root{
  /* 品牌色板 */
  --amber:#F59E0B;
  --gold:#FBBF24;
  --night:#1E1B4B;
  --deep:#0F172A;
  --velvet:#9F1239;
  --velvet-soft:#FB7185;
  --cyan:#22D3EE;
  --warm:#F8FAFC;
  --coal:#1C1917;
  --stone:#64748B;
  --green:#10B981;

  /* 派生层 */
  --night-900:#141232;
  --night-700:#2A2660;
  --ink:var(--warm);
  --ink-dim:#A9A7CC;
  --line:rgba(248,250,252,.14);
  --line-soft:rgba(248,250,252,.07);
  --line-strong:rgba(248,250,252,.28);

  /* 字体 */
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Courier New",monospace;

  /* 度量 */
  --header-h:74px;
  --shell-w:1240px;
  --cut:16px;
  --ease:cubic-bezier(.22,.7,.28,1);
}

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

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

body{
  margin:0;
  background:var(--deep);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
::selection{background:var(--amber);color:var(--coal);}

/* ---------- 通用容器 ---------- */
.container{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.container--narrow{max-width:860px;}

.header-offset{padding-top:calc(var(--header-h) + clamp(16px,4vw,40px));}

/* ---------- 背景分区 ---------- */
.section{
  position:relative;
  padding-block:clamp(48px,7vw,104px);
}
.section--night{background:linear-gradient(180deg,var(--night-900),var(--night) 60%,var(--night-900));}
.section--deep{background:var(--deep);}
.section--warm{
  --ink:var(--coal);
  --ink-dim:#48566B;
  --line:rgba(28,25,23,.14);
  --line-soft:rgba(28,25,23,.07);
  --line-strong:rgba(28,25,23,.26);
  background:var(--warm);
  color:var(--ink);
}

/* ---------- 章节头 ---------- */
.section-head{margin-bottom:clamp(24px,3.4vw,48px);max-width:820px;}

.section-index{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan);
  margin-bottom:14px;
}

.section-title{
  font-size:clamp(26px,3.4vw,42px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:.01em;
  color:var(--ink);
}
.section-title::before{
  content:"";
  display:block;
  width:58px;
  height:7px;
  margin-bottom:18px;
  background:linear-gradient(90deg,var(--amber),var(--gold) 70%,var(--velvet));
  clip-path:polygon(0 0,100% 0,calc(100% - 9px) 100%,0 100%);
}

.section-lede{
  font-size:clamp(30px,5.4vw,68px);
  font-weight:200;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--ink);
  margin-top:10px;
}
.section-lede em{
  font-style:normal;
  color:var(--gold);
}

.slant-rule{
  height:3px;
  background:linear-gradient(90deg,
    var(--amber) 0 30%,
    var(--velvet) 30% 42%,
    transparent 42% 46%,
    var(--cyan) 46% 100%);
  opacity:.85;
}

/* ---------- 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:.55em;
  padding:.85em 1.4em;
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .28s var(--ease),background-color .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.btn::after{
  content:"";
  width:0;
  height:0;
  border-style:solid;
  border-width:5px 0 5px 8px;
  border-color:transparent transparent transparent currentColor;
  opacity:.75;
  transition:transform .28s var(--ease);
}
.btn:hover{transform:translate3d(3px,-2px,0);}
.btn:hover::after{transform:translateX(3px);}
.btn--primary{background:var(--amber);color:var(--coal);box-shadow:inset 0 -3px 0 rgba(28,25,23,.22);}
.btn--primary:hover{background:var(--gold);}
.btn--ghost{background:rgba(248,250,252,.04);color:var(--ink);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold);}
.btn--quiet{background:transparent;color:var(--gold);border-color:rgba(245,158,11,.45);}
.btn--quiet:hover{background:rgba(245,158,11,.12);}

/* ---------- 面板与卡片 ---------- */
.cut{
  position:relative;
  background:linear-gradient(155deg,rgba(42,38,96,.94),rgba(20,18,50,.97));
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.cut > *{position:relative;z-index:1;}

.card{
  position:relative;
  padding:clamp(18px,2.2vw,26px);
  background:linear-gradient(160deg,rgba(42,38,96,.78),rgba(20,18,50,.92));
  border:1px solid var(--line);
  transition:transform .38s var(--ease),border-color .38s var(--ease),box-shadow .38s var(--ease),background-color .38s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  inset:0 auto auto 0;
  width:38px;
  height:3px;
  background:var(--amber);
  opacity:.9;
}
.card--float:hover,
.card--float:focus-within{
  transform:translate3d(7px,-7px,0);
  border-color:rgba(245,158,11,.55);
  box-shadow:0 26px 48px -28px rgba(34,211,238,.55),0 0 0 1px rgba(34,211,238,.14);
}

/* ---------- 数值 ---------- */
.stat{display:flex;flex-direction:column;gap:6px;}
.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,44px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}
.stat-value--cyan{color:var(--cyan);}
.stat-label{
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--ink-dim);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.45em;
  padding:.32em .68em;
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.4;
  border:1px solid currentColor;
  white-space:nowrap;
}
.tag--amber{color:var(--gold);}
.tag--velvet{color:var(--velvet-soft);}
.tag--cyan{color:var(--cyan);}
.tag--live{color:var(--green);}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin-bottom:clamp(18px,2.6vw,32px);}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ink-dim);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:.5em;}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  color:var(--stone);
  margin-right:.25em;
}
.breadcrumb-item[aria-current="page"]{color:var(--gold);}
.breadcrumb-link{color:var(--ink-dim);transition:color .25s var(--ease);}
.breadcrumb-link:hover{color:var(--gold);}

/* ---------- 图片容器（页面阶段放图） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:linear-gradient(140deg,var(--night-700),var(--deep) 70%);
  box-shadow:inset 0 0 0 1px rgba(34,211,238,.12);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s var(--ease);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(20,18,50,0) 45%,rgba(20,18,50,.82));
}
.media-frame::before{
  content:"";
  position:absolute;
  z-index:2;
  left:0;
  bottom:0;
  width:52px;
  height:4px;
  background:var(--amber);
}
.media-frame:hover img{transform:scale(1.035);}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}

/* ---------- 网格 ---------- */
.grid{
  display:grid;
  gap:clamp(16px,2.4vw,30px);
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}

/* ==========================================================================
   页头
   ========================================================================== */
.skip-link{
  position:absolute;
  top:-80px;
  left:14px;
  z-index:200;
  padding:11px 18px;
  background:var(--amber);
  color:var(--coal);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  transition:top .24s var(--ease);
}
.skip-link:focus{top:14px;}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:90;
  color:var(--warm);
  background:linear-gradient(180deg,rgba(20,18,50,.9),rgba(20,18,50,0));
  transition:background-color .38s var(--ease),box-shadow .38s var(--ease),backdrop-filter .38s var(--ease);
}
.site-header.is-solid{
  background:rgba(15,23,42,.95);
  box-shadow:0 1px 0 rgba(248,250,252,.09),0 22px 44px -32px rgba(0,0,0,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,28px);
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  min-height:var(--header-h);
  padding-inline:clamp(16px,4vw,40px);
}

/* 品牌 */
.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding-block:10px;
  flex:0 0 auto;
}
.brand-chip{
  width:22px;
  height:22px;
  flex:0 0 auto;
  background:linear-gradient(135deg,var(--amber),var(--velvet));
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
  box-shadow:0 0 0 1px rgba(248,250,252,.18);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{
  font-size:17px;
  font-weight:800;
  letter-spacing:.09em;
  color:var(--warm);
}
.brand-tagline{
  font-size:11px;
  letter-spacing:.1em;
  color:var(--ink-dim);
  white-space:nowrap;
}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,26px);
  margin-left:auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,24px);
}
.nav-item{display:block;}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:6px 2px 8px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.07em;
  color:rgba(248,250,252,.76);
  transition:color .26s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber),var(--cyan));
  transition:transform .3s var(--ease);
}
.nav-link:hover{color:var(--warm);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--gold);font-weight:700;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--cyan);
  opacity:.85;
}
.nav-label{white-space:nowrap;}

.nav-meta{
  display:flex;
  align-items:center;
  padding-left:clamp(12px,1.6vw,22px);
  border-left:1px solid var(--line);
}
.nav-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-dim);
  white-space:nowrap;
}
.status-dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--green);
  animation:pulse-dot 2.8s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%,100%{box-shadow:0 0 0 0 rgba(16,185,129,.55);}
  50%{box-shadow:0 0 0 6px rgba(16,185,129,0);}
}

/* 移动按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 12px;
  border:1px solid var(--line);
  background:rgba(20,18,50,.55);
  cursor:pointer;
  transition:border-color .26s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);}
.nav-toggle-bars{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:18px;
}
.nav-toggle-bar{
  display:block;
  height:2px;
  width:100%;
  background:var(--gold);
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle-label{
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--warm);
}

/* 阅读进度 */
.read-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(248,250,252,.09);
  overflow:hidden;
}
.read-progress-fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber),var(--gold) 55%,var(--cyan));
  transition:transform .12s linear;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  background:
    radial-gradient(120% 90% at 12% 0%,rgba(159,18,57,.28),transparent 58%),
    linear-gradient(180deg,var(--night-900),var(--deep));
  color:var(--ink);
  border-top:1px solid var(--line);
  padding-block:clamp(40px,5vw,72px) clamp(28px,3.4vw,40px);
}
.footer-shell{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.5fr);
  gap:clamp(22px,3vw,44px);
  padding-bottom:clamp(26px,3.4vw,44px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{display:flex;flex-direction:column;gap:12px;}
.footer-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  font-size:20px;
  font-weight:800;
  color:var(--coal);
  background:linear-gradient(135deg,var(--amber),var(--gold));
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
}
.footer-brand-name{
  font-size:19px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--warm);
}
.footer-brand-note{
  font-size:13px;
  line-height:1.75;
  color:var(--ink-dim);
  max-width:26em;
}
.footer-col{display:flex;flex-direction:column;gap:14px;}
.footer-col-title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--gold);
}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list-item{
  display:flex;
  flex-wrap:wrap;
  gap:4px 10px;
  font-size:13.5px;
  line-height:1.6;
  color:var(--ink-dim);
}
.footer-link{
  position:relative;
  color:var(--ink-dim);
  transition:color .24s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .28s var(--ease);
}
.footer-link:hover{color:var(--warm);}
.footer-link:hover::after{transform:scaleX(1);}
.footer-contact-label{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--cyan);
  padding-top:3px;
}
.footer-contact-value{
  flex:1 1 12em;
  color:var(--warm);
  word-break:break-word;
}
.footer-col--contact .footer-list-item{border-bottom:1px dashed var(--line-soft);padding-bottom:9px;}
.footer-col--contact .footer-list-item:last-child{border-bottom:0;padding-bottom:0;}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:8px 26px;
  align-items:center;
  padding-top:clamp(18px,2.2vw,26px);
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.09em;
  color:var(--ink-dim);
}
.footer-note{
  margin-top:12px;
  font-size:12.5px;
  line-height:1.75;
  color:var(--stone);
  max-width:62em;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:900px){
  .grid--2,
  .grid--3,
  .grid--split{grid-template-columns:minmax(0,1fr);}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:880px){
  :root{--header-h:62px;}

  .site-header{
    background:rgba(20,18,50,.97);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    box-shadow:0 1px 0 rgba(248,250,252,.09);
  }

  .brand-tagline{display:none;}
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    margin-left:0;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:rgba(15,23,42,.98);
    border-top:1px solid transparent;
    transition:max-height .4s var(--ease),visibility .4s var(--ease),border-color .4s var(--ease);
  }
  .site-nav[data-open="true"]{
    max-height:min(80vh,660px);
    overflow-y:auto;
    visibility:visible;
    border-top-color:rgba(245,158,11,.4);
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0;
  }
  .nav-link{
    display:flex;
    align-items:center;
    gap:14px;
    padding:16px clamp(16px,4vw,40px);
    font-size:16px;
    border-bottom:1px solid var(--line-soft);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(245,158,11,.16),transparent 70%);
    box-shadow:inset 3px 0 0 var(--amber);
  }
  .nav-index{font-size:11px;}

  .nav-meta{
    padding:14px clamp(16px,4vw,40px) 20px;
    border-left:0;
  }
}

@media (max-width:640px){
  :root{--cut:12px;}

  body{font-size:15.5px;}

  .section-lede{font-size:clamp(26px,8.6vw,40px);}

  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }

  .btn:hover,
  .card--float:hover,
  .card--float:focus-within{transform:none;}
  .media-frame:hover img{transform:none;}
  .read-progress-fill{transition:none;}
}