/* =========================================================
   极速百家家乐 · /assets/site.css
   共享外壳样式：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --blue:#0066FF;
  --blue-deep:#0047B3;
  --blue-light:#4D94FF;
  --orange:#FF6B35;
  --orange-soft:#FFA06B;
  --ink:#2C3E50;
  --paper:#F8F9FA;
  --cloud:#E4E9F2;
  --muted:#7A8AA0;
  --muted-strong:#5B6B80;
  --green:#12C48B;

  --rail-w:168px;
  --bar-h:62px;
  --brutal:3px;
  --shadow-sm:4px 4px 0 var(--ink);
  --shadow-md:6px 6px 0 var(--ink);

  --font:'HarmonyOS Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --step-hero:clamp(2.75rem,8vw,6rem);
  --step-h2:clamp(1.75rem,3.2vw,2.75rem);
  --step-h3:1.25rem;
  --step-body:1rem;
  --step-note:.875rem;

  --gutter:clamp(20px,4vw,56px);
  --page:1240px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video,canvas{display:block;max-width:100%}
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%}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}

/* ---------- 3. 中文排版与全局 ---------- */
body{
  font-family:var(--font);
  font-size:var(--step-body);
  font-weight:400;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  padding-top:var(--bar-h);
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
p{max-width:40em}
strong,b{font-weight:700}
em{font-style:normal}
.h-display{font-size:var(--step-hero);font-weight:900;line-height:.98;letter-spacing:-.02em}
.h-section{font-size:var(--step-h2);font-weight:800;line-height:1.15;letter-spacing:-.01em}
.h-sub{font-size:var(--step-h3);font-weight:700;line-height:1.35}
.lead{font-size:clamp(1.05rem,1.5vw,1.2rem);line-height:1.75;color:var(--muted-strong);font-weight:400}
.note{font-size:var(--step-note);color:var(--muted-strong);line-height:1.7}
.num{font-variant-numeric:tabular-nums;font-weight:700}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  padding:.65rem 1.1rem;
  background:var(--blue);
  color:#fff;
  font-size:.9rem;
  font-weight:700;
  border:var(--brutal) solid var(--ink);
  box-shadow:var(--shadow-sm);
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 5. 容器与网格 ---------- */
.container{width:100%;max-width:var(--page);margin:0 auto;padding-inline:var(--gutter)}
.container--narrow{max-width:880px}
.section{padding-block:clamp(72px,10vw,128px)}
.section--tight{padding-block:clamp(48px,6vw,80px)}
#main-content{scroll-margin-top:calc(var(--bar-h) + 14px)}
.grid{display:grid;gap:clamp(20px,3vw,32px)}
.grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.68rem 1.3rem;
  font-size:.92rem;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  white-space:nowrap;
  color:var(--ink);
  background:var(--paper);
  border:var(--brutal) solid var(--ink);
  box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn--accent{background:var(--orange);color:#fff}
.btn--primary{background:var(--blue);color:#fff}
.btn--ghost{background:transparent;box-shadow:none}
.btn--ghost:hover{background:var(--cloud);transform:none;box-shadow:none}

/* ---------- 7. 命令栏 ---------- */
.site-header{display:block}
.command-bar{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:var(--bar-h);
  background:var(--ink);
  color:var(--paper);
  border-bottom:var(--brutal) solid var(--blue);
}
@media (min-width:1024px){
  .command-bar{left:var(--rail-w)}
}
.command-inner{
  height:100%;
  max-width:var(--page);
  margin:0 auto;
  padding-inline:var(--gutter);
  display:flex;
  align-items:center;
  gap:14px;
}
.command-brand{display:flex;align-items:center;gap:9px;min-width:0}
.command-brand__mark{
  width:26px;height:26px;flex:0 0 auto;
  display:grid;place-items:center;
  background:var(--blue);
  color:#fff;
  font-size:.72rem;
  font-weight:900;
  border:2px solid var(--paper);
}
.command-brand__name{
  font-size:.95rem;
  font-weight:800;
  letter-spacing:.02em;
  white-space:nowrap;
}
@media (min-width:1024px){
  .command-brand{display:none}
}
.command-chapter{
  display:none;
  align-items:center;
  gap:9px;
  min-width:0;
  font-size:.76rem;
  letter-spacing:.08em;
  color:rgba(248,249,250,.7);
}
@media (min-width:768px){
  .command-chapter{display:flex}
}
.command-chapter__num{
  font-weight:800;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
}
.command-chapter__text{
  max-width:16ch;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.command-status{
  display:none;
  align-items:center;
  gap:8px;
  font-size:.76rem;
  color:rgba(248,249,250,.78);
  white-space:nowrap;
}
@media (min-width:1120px){
  .command-status{display:flex;margin-left:auto}
}
.command-status__dot{
  width:8px;height:8px;flex:0 0 auto;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(18,196,139,.24);
}
.command-cta{margin-left:auto}
@media (min-width:1120px){
  .command-cta{margin-left:0}
}
.command-bar .btn{
  border-color:var(--paper);
  box-shadow:3px 3px 0 rgba(248,249,250,.85);
  padding:.5rem 1rem;
  font-size:.84rem;
}
.command-bar .btn:hover{
  transform:translate(-2px,-2px);
  box-shadow:5px 5px 0 rgba(248,249,250,.85);
}
.command-bar .btn:active{transform:translate(1px,1px);box-shadow:1px 1px 0 rgba(248,249,250,.85)}

.read-progress{
  position:absolute;
  left:0;bottom:0;
  width:100%;height:3px;
  background:rgba(248,249,250,.14);
  pointer-events:none;
}
.read-progress__fill{
  display:block;
  width:100%;height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue) 0%,var(--blue-light) 48%,var(--orange) 100%);
}

/* ---------- 8. 导航开关（移动端） ---------- */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:.45rem .7rem;
  color:var(--paper);
  font-size:.78rem;
  font-weight:700;
  border:2px solid rgba(248,249,250,.55);
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--paper);background:rgba(248,249,250,.1)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;height:2px;
  background:currentColor;
  transition:transform .22s ease;
}
.site-header[data-open] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}
@media (min-width:1024px){
  .nav-toggle{display:none}
}

/* ---------- 9. 索引轨道 ---------- */
.rail{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:90;
  max-height:82vh;
  overflow-y:auto;
  padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px));
  background:var(--paper);
  border-top:var(--brutal) solid var(--ink);
  box-shadow:0 -10px 0 rgba(44,62,80,.06);
  transform:translateY(110%);
  transition:transform .3s cubic-bezier(.2,.7,.3,1);
}
.site-header[data-open] .rail{transform:translateY(0)}
.rail-brand,.rail-foot__label{display:none}

.rail-nav{display:flex;flex-direction:column;gap:10px}
.rail-nav__label{
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--muted);
  padding-left:2px;
}
.rail-list{display:grid;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr))}
.rail-item{min-width:0}
.rail-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  padding:.6rem .7rem;
  font-size:.86rem;
  font-weight:600;
  color:var(--ink);
  background:#fff;
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--cloud);
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.rail-link:hover{background:var(--cloud);transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.rail-num{
  min-width:1.7em;
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.rail-label{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rail-link[aria-current="page"]{
  background:rgba(0,102,255,.12);
  border-color:var(--blue);
  color:var(--blue-deep);
}
.rail-link[aria-current="page"] .rail-num{color:var(--blue)}
.rail-link[aria-current="page"]::after{
  content:"";
  margin-left:auto;
  width:8px;height:8px;flex:0 0 auto;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,107,53,.22);
}

.rail-foot{margin-top:18px;padding-top:14px;border-top:2px dashed var(--cloud)}
.rail-foot__list{display:grid;gap:6px;font-size:.76rem;color:var(--muted-strong)}
.rail-foot__list li{display:flex;align-items:center;gap:8px}

.dot{width:7px;height:7px;flex:0 0 auto;border-radius:50%}
.dot--blue{background:var(--blue)}
.dot--green{background:var(--green)}
.dot--orange{background:var(--orange)}

@media (min-width:1024px){
  .rail{
    top:0;bottom:0;right:auto;left:0;
    width:var(--rail-w);
    max-height:none;
    transform:none;
    transition:none;
    border-top:0;
    border-right:var(--brutal) solid var(--ink);
    box-shadow:none;
    padding:22px 16px 24px;
    display:flex;
    flex-direction:column;
    gap:22px;
  }
  .rail-brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
  }
  .rail-brand__mark{
    width:38px;height:38px;flex:0 0 auto;
    display:grid;place-items:center;
    background:var(--blue);
    color:#fff;
    font-size:1rem;
    font-weight:900;
    border:var(--brutal) solid var(--ink);
    box-shadow:3px 3px 0 var(--ink);
  }
  .rail-brand__text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
  .rail-brand__text strong{font-size:.92rem;font-weight:800;letter-spacing:.01em}
  .rail-brand__text em{font-size:.68rem;color:var(--muted-strong);letter-spacing:.05em}

  .rail-nav{flex:1 1 auto;min-height:0;overflow-y:auto;gap:12px}
  .rail-list{grid-template-columns:minmax(0,1fr);gap:2px}
  .rail-link{
    background:transparent;
    border:0;
    border-left:3px solid transparent;
    box-shadow:none;
    padding:.55rem .6rem;
    font-size:.88rem;
    color:var(--ink);
  }
  .rail-link:hover{
    background:var(--cloud);
    transform:none;
    box-shadow:none;
    border-left-color:var(--blue-light);
  }
  .rail-link[aria-current="page"]{
    background:rgba(0,102,255,.12);
    border-left-color:var(--blue);
    color:var(--blue-deep);
  }
  .rail-foot{display:block;margin-top:0;flex:0 0 auto}
  .rail-foot__label{
    display:block;
    font-size:.68rem;
    font-weight:700;
    letter-spacing:.2em;
    color:var(--muted);
    margin-bottom:10px;
  }
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  margin-top:clamp(72px,10vw,128px);
  background:var(--ink);
  color:rgba(248,249,250,.82);
  border-top:var(--brutal) solid var(--ink);
  padding-top:clamp(48px,6vw,80px);
}
.footer-inner{
  max-width:var(--page);
  margin:0 auto;
  padding-inline:var(--gutter);
  display:grid;
  gap:clamp(32px,5vw,56px);
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:768px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .footer-inner{grid-template-columns:1.1fr 1.7fr 1fr}
}
.footer-lead__brand{
  font-size:1.35rem;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--paper);
  line-height:1.3;
}
.footer-lead__note{
  margin-top:6px;
  font-size:.8rem;
  letter-spacing:.08em;
  color:rgba(248,249,250,.66);
}
.footer-metrics{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  margin-top:22px;
}
.footer-metrics li{
  display:flex;
  align-items:baseline;
  gap:6px;
  font-size:.76rem;
  color:rgba(248,249,250,.7);
}
.footer-metrics b{
  font-size:1.25rem;
  font-weight:800;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
}
.footer-lead__cta{margin-top:24px}

.footer-cols{
  display:grid;
  gap:28px;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
@media (min-width:560px){
  .footer-cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.footer-col__title{
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.18em;
  color:rgba(248,249,250,.52);
  margin-bottom:14px;
}
.footer-col__list li+li{margin-top:9px}
.footer-col__list a{
  font-size:.86rem;
  color:rgba(248,249,250,.86);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-col__list a:hover{color:var(--orange);border-bottom-color:var(--orange)}

.footer-contact__title{
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.18em;
  color:rgba(248,249,250,.52);
  margin-bottom:14px;
}
.footer-contact__list{display:grid;gap:10px}
.footer-contact__list li{
  display:flex;
  gap:10px;
  font-size:.84rem;
  color:rgba(248,249,250,.86);
  word-break:break-word;
}
.footer-contact__list span{
  flex:0 0 38px;
  color:rgba(248,249,250,.48);
  font-size:.76rem;
  line-height:1.9;
}
.footer-contact__list b{font-weight:600}
.footer-contact__addr{line-height:1.6}
.footer-contact__note{
  margin-top:16px;
  font-size:.74rem;
  line-height:1.75;
  color:rgba(248,249,250,.55);
}
.footer-base{
  max-width:var(--page);
  margin:clamp(40px,5vw,64px) auto 0;
  padding:20px var(--gutter) 28px;
  border-top:1px solid rgba(248,249,250,.14);
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  justify-content:space-between;
  font-size:.74rem;
  color:rgba(248,249,250,.58);
}
.footer-base p{max-width:none}
.footer-base__closing{letter-spacing:.04em}

/* ---------- 11. 通用组件 ---------- */
.breadcrumb{font-size:var(--step-note);color:var(--muted-strong)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem}
.breadcrumb li+li::before{content:"/";margin-right:.35rem;color:var(--muted)}
.breadcrumb a{transition:color .18s ease}
.breadcrumb a:hover{color:var(--blue)}

.panel{
  background:#fff;
  border:var(--brutal) solid var(--ink);
  box-shadow:var(--shadow-md);
  padding:clamp(20px,3vw,32px);
}
.panel--ink{background:var(--ink);color:var(--paper)}
.panel--blue{background:var(--blue);color:#fff}
.panel--soft{background:var(--cloud);box-shadow:var(--shadow-sm)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.22rem .6rem;
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--ink);
  background:var(--paper);
  border:2px solid var(--ink);
}
.tag--blue{background:var(--blue);color:#fff;border-color:var(--blue-deep)}
.tag--orange{background:var(--orange);color:#fff;border-color:var(--ink)}
.tag--ghost{background:transparent;border-color:var(--muted)}

.speed-strip{
  height:4px;
  background:repeating-linear-gradient(90deg,
    var(--blue) 0 26px,transparent 26px 42px,
    var(--orange) 42px 68px,transparent 68px 84px,
    var(--ink) 84px 90px,transparent 90px 106px);
}

/* ---------- 12. 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  background:var(--cloud);
  border:var(--brutal) solid var(--ink);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--framed{box-shadow:var(--shadow-md)}
.media--hero{aspect-ratio:16/9}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--portrait{aspect-ratio:3/4}
.media--circle{aspect-ratio:1/1;border-radius:50%}
@media (max-width:640px){
  .media--wide{aspect-ratio:16/9}
}
.media__pattern{
  position:absolute;inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(135deg,
    rgba(0,102,255,.10) 0 2px,transparent 2px 14px);
}
.media__caption{
  margin-top:10px;
  font-size:var(--step-note);
  color:var(--muted-strong);
}

/* ---------- 13. 入场动画钩子 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
}
.js .reveal.is-visible{opacity:1;transform:none}

/* ---------- 14. 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js .reveal{opacity:1 !important;transform:none !important}
  .rail{transition:none}
  .skip-link{transition:none}
}