/* ==========================================================================
   哈狗游戏官网 · 共享样式 /assets/site.css
   底色层 — 结构层 — 海报层
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-900:#0A1030;
  --ink-700:#16225C;
  --ink-950:#080A16;
  --orange-500:#FF6A1F;
  --orange-300:#FFA65C;
  --cyan-400:#16E3D6;
  --cyan-200:#9DF5EE;
  --cream-100:#FFF3E1;
  --amber-400:#FFC93C;
  --lime-100:#E8ECF7;
  --muted-400:#9AA6CC;
  --muted-500:#5C6182;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --gutter:clamp(16px,3.4vw,44px);
  --shell:1200px;
  --bw:3px;
  --hard:6px 6px 0 var(--ink-950);
  --hard-sm:4px 4px 0 var(--ink-950);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  color-scheme:dark;
}
body{
  margin:0;
  background-color:var(--ink-900);
  color:var(--lime-100);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
html.is-locked,
html.is-locked body{overflow:hidden}
img,svg,video,canvas{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:900;line-height:1.18;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--orange-500);color:var(--ink-950)}
:focus-visible{outline:3px solid var(--cyan-400);outline-offset:2px}

/* ---------- 3. 中文排版层级 ---------- */
.display-1{font-size:clamp(44px,9vw,112px);font-weight:900;line-height:1;letter-spacing:-.03em}
.display-2{font-size:clamp(32px,5.2vw,64px);font-weight:900;line-height:1.06;letter-spacing:-.02em}
.h-section{font-size:clamp(24px,3vw,34px);font-weight:900;line-height:1.2}
.h-sub{font-size:clamp(19px,2vw,24px);font-weight:800;line-height:1.35}
.lede{font-size:clamp(17px,1.5vw,20px);line-height:1.7}
.num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.02em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.18em;
  color:var(--cyan-200);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:24px;height:3px;background:var(--cyan-400);flex:0 0 auto}

/* ---------- 4. 布局容器与分区 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:1440px}
.container--narrow{max-width:820px}

.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--panel{background-color:var(--ink-700)}
.section--cream{background-color:var(--cream-100);color:var(--ink-950)}
.section--cream .eyebrow{color:#0E6E6A}
.section--cream .eyebrow::before{background:#0E6E6A}
.section--cream .stat__label{color:var(--muted-500)}
.section--cream .card__meta{color:#0E6E6A}
.section--cream .prose a{color:var(--ink-950);text-decoration-color:var(--orange-500)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 5. 正文与面包屑 ---------- */
.prose{max-width:38em;line-height:1.8}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(22px,2.4vw,28px);margin-top:1.9em}
.prose h3{font-size:clamp(18px,2vw,22px);margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.25em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.5em}
.prose a{color:var(--cyan-400);text-decoration:underline;text-underline-offset:3px}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:14px;
  font-size:14px;
  color:var(--muted-400);
}
.breadcrumb a{color:var(--cyan-200);text-decoration:none;border-bottom:2px solid transparent}
.breadcrumb a:hover{border-bottom-color:var(--cyan-400)}
.breadcrumb__sep{color:var(--orange-500);font-weight:800}
.breadcrumb [aria-current="page"]{color:var(--lime-100);font-weight:700}
.section--cream .breadcrumb{color:var(--muted-500)}
.section--cream .breadcrumb a{color:var(--ink-950)}
.section--cream .breadcrumb [aria-current="page"]{color:var(--ink-950)}

/* ---------- 6. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:48px;
  padding:12px 22px;
  font-family:inherit;
  font-size:16px;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  color:var(--ink-950);
  background-color:var(--orange-500);
  border:var(--bw) solid var(--ink-950);
  box-shadow:var(--hard-sm);
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease);
}
.btn:hover,.btn:focus-visible{
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 var(--ink-950);
}
.btn:active{
  transform:translate(4px,4px);
  box-shadow:0 0 0 var(--ink-950);
}
.btn--cyan{background-color:var(--cyan-400)}
.btn--line{
  background-color:transparent;
  color:var(--cyan-200);
  border-color:var(--cyan-400);
  box-shadow:4px 4px 0 var(--ink-950);
}
.btn--line:hover,.btn--line:focus-visible{
  background-color:var(--cyan-400);
  color:var(--ink-950);
  border-color:var(--ink-950);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.04em;
  line-height:1.4;
  color:var(--ink-950);
  background-color:var(--cyan-200);
  border:2px solid var(--ink-950);
}
.chip--orange{background-color:var(--orange-500)}
.chip--amber{background-color:var(--amber-400)}
.chip--line{background-color:transparent;color:var(--cyan-200);border-color:var(--cyan-400)}
.section--cream .chip--line{color:var(--ink-950);border-color:var(--ink-950)}

/* ---------- 7. 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background-color:var(--ink-700);
  color:var(--lime-100);
  border:var(--bw) solid var(--ink-950);
  box-shadow:var(--hard);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(2px);box-shadow:4px 4px 0 var(--ink-950)}
.card--cream{background-color:var(--cream-100);color:var(--ink-950)}
.card--flat{box-shadow:2px 2px 0 var(--ink-950)}
.card__title{font-size:clamp(19px,2vw,23px);font-weight:900;letter-spacing:-.01em}
.card__meta{
  font-size:13px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--cyan-200);
}
.card__index{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4vw,44px);
  font-weight:900;
  line-height:1;
  color:var(--amber-400);
}

/* ---------- 8. 图片容器（页面阶段放图） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background-color:var(--ink-700);
  border:var(--bw) solid var(--ink-950);
  box-shadow:var(--hard);
}
.media img{width:100%;height:100%;object-fit:cover;object-position:center}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--3x4{aspect-ratio:3/4}
.media--wide{aspect-ratio:21/9}
.media__placeholder{
  display:grid;
  place-items:center;
  height:100%;
  padding:14px;
  text-align:center;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--cyan-200);
  background-color:var(--ink-700);
  background-image:repeating-linear-gradient(135deg,rgba(22,227,214,.16) 0 2px,transparent 2px 13px);
}
.media__caption{
  margin-top:10px;
  font-size:13px;
  line-height:1.6;
  color:var(--muted-400);
}

/* ---------- 9. 数字块与步骤路径 ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4.4vw,52px);
  font-weight:900;
  line-height:1;
  color:var(--amber-400);
}
.stat__label{font-size:14px;letter-spacing:.06em;color:var(--muted-400)}

.steps{display:grid;gap:14px}
.step{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:14px;
  align-items:start;
  padding:16px 18px;
  background-color:var(--ink-700);
  border:var(--bw) solid var(--ink-950);
  box-shadow:var(--hard-sm);
}
.step__no{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:18px;
  font-weight:900;
  color:var(--ink-950);
  background-color:var(--orange-500);
  border:3px solid var(--ink-950);
}

/* ---------- 10. 显现动效 ---------- */
.has-js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .35s var(--ease),transform .35s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.has-js .reveal.is-in{opacity:1;transform:none}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-3px;
  width:100%;
  height:4px;
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  background-image:linear-gradient(90deg,var(--cyan-400),var(--orange-500));
  pointer-events:none;
  z-index:6;
}

/* ---------- 11. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background-color:var(--ink-900);
  border-bottom:var(--bw) solid var(--ink-950);
}
.skip-link{
  position:absolute;
  top:-80px;
  left:16px;
  z-index:120;
  padding:10px 18px;
  font-size:15px;
  font-weight:800;
  text-decoration:none;
  color:var(--ink-950);
  background-color:var(--cyan-400);
  border:var(--bw) solid var(--ink-950);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.header-ticker{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  max-height:48px;
  padding:7px var(--gutter);
  overflow:hidden;
  font-size:13px;
  font-weight:800;
  letter-spacing:.06em;
  line-height:1.4;
  color:var(--ink-950);
  background-color:var(--cyan-400);
  transition:max-height .25s var(--ease),padding .25s var(--ease),opacity .2s linear;
}
.header-ticker__text{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.header-ticker__dot{
  width:10px;
  height:10px;
  flex:0 0 auto;
  border:2px solid var(--ink-950);
  border-radius:50%;
  background-color:var(--orange-500);
  animation:hg-pulse 1.6s infinite;
}
.header-ticker__meta{white-space:nowrap;opacity:.78}
@keyframes hg-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.4;transform:scale(.78)}
}
.site-header.is-condensed .header-ticker{max-height:0;padding-block:0;opacity:0}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,26px);
  width:100%;
  max-width:1440px;
  min-height:84px;
  margin-inline:auto;
  padding:10px var(--gutter);
  transition:min-height .25s var(--ease),padding .25s var(--ease);
}
.header-shell::before,
.header-shell::after{content:"";position:absolute;top:0;bottom:0;width:6px}
.header-shell::before{left:0;background-color:var(--cyan-400)}
.header-shell::after{right:0;background-color:var(--orange-500)}
.site-header.is-condensed .header-shell{min-height:64px;padding-block:5px}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--cream-100);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  font-size:22px;
  font-weight:900;
  line-height:1;
  color:var(--ink-950);
  background-color:var(--orange-500);
  border:3px solid var(--ink-950);
  box-shadow:3px 3px 0 var(--cyan-400);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.brand:hover .brand__mark{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--cyan-400)}
.brand__text{display:flex;flex-direction:column;line-height:1.12}
.brand__name{font-size:20px;font-weight:900;letter-spacing:.02em}
.brand__tag{font-size:11px;font-weight:800;letter-spacing:.2em;color:var(--cyan-200)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  min-height:48px;
  padding:8px 14px;
  font-size:14px;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--lime-100);
  background-color:var(--ink-700);
  border:var(--bw) solid var(--ink-950);
  box-shadow:var(--hard-sm);
  cursor:pointer;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:3px;background-color:var(--cyan-400)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle__label{white-space:nowrap}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:85;
  background-color:rgba(8,10,22,.7);
  border:0;
}
.nav-scrim[hidden]{display:none}

.nav-drawer{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.2vw,18px);
  flex:1 1 auto;
  min-width:0;
}
.nav{display:flex;align-items:center;gap:2px}
.nav--left{margin-left:clamp(4px,1.2vw,20px)}
.nav--right{margin-left:auto}
.nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 12px;
  font-size:15.5px;
  font-weight:700;
  letter-spacing:.01em;
  text-decoration:none;
  color:var(--lime-100);
  border-bottom:3px solid transparent;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav__link:hover,
.nav__link:focus-visible{color:var(--cyan-400);border-bottom-color:var(--cyan-400)}
.nav__link[aria-current="page"]{
  color:var(--ink-950);
  background-color:var(--orange-500);
  border-bottom-color:var(--ink-950);
}
.header-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  padding-top:clamp(40px,6vw,72px);
  color:var(--lime-100);
  background-color:var(--ink-900);
  border-top:6px solid var(--orange-500);
  background-image:linear-gradient(180deg,rgba(22,227,214,.07),rgba(22,227,214,0) 42%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:clamp(90px,18vw,260px);
  height:6px;
  background-color:var(--cyan-400);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(260px,1.5fr) repeat(3,minmax(140px,1fr));
  gap:clamp(24px,4vw,56px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:0 var(--gutter) clamp(32px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:12px;max-width:34ch}
.footer-slogan{font-size:16px;font-weight:800;letter-spacing:.06em;color:var(--cyan-200)}
.footer-contact{font-size:15px;line-height:1.7}
.footer-address{font-size:14px;line-height:1.7;color:var(--muted-400)}

.footer-col{display:flex;flex-direction:column;gap:2px}
.footer-col__title{
  margin-bottom:10px;
  padding-bottom:8px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--cyan-200);
  border-bottom:2px solid var(--ink-700);
}
.footer-col__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font-size:16px;
  font-weight:600;
  text-decoration:none;
  color:var(--lime-100);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col__link:hover,.footer-col__link:focus-visible{color:var(--orange-300);transform:translateX(3px)}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:18px var(--gutter) 28px;
  font-size:14px;
  color:var(--muted-400);
  border-top:2px solid var(--ink-700);
}
.footer-copy{margin-right:auto}
.footer-legal{font-weight:700;color:var(--muted-400)}
.footer-note{color:var(--muted-500)}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:48px;
  padding:10px 18px;
  font-size:14px;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--cyan-200);
  background-color:transparent;
  border:3px solid var(--cyan-400);
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.to-top::after{content:"↑";font-size:16px}
.to-top:hover,.to-top:focus-visible{background-color:var(--cyan-400);color:var(--ink-950);transform:translateY(-2px)}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1180px){
  .brand__tag{display:none}
  .nav__link{padding:0 9px;font-size:14.5px}
  .header-cta .btn{padding:10px 14px;font-size:14.5px}
}
@media (max-width:1024px){
  .header-shell{gap:10px}
  .brand__name{font-size:18px}
  .brand__mark{width:38px;height:38px;font-size:19px}
  .nav__link{padding:0 7px;font-size:14px;letter-spacing:0}
  .header-cta .btn{padding:10px 12px;font-size:14px}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-drawer{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:90;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    width:min(360px,86vw);
    padding:96px 20px 32px;
    overflow-y:auto;
    background-color:var(--ink-900);
    border-left:var(--bw) solid var(--ink-950);
    box-shadow:-10px 0 0 rgba(8,10,22,.45);
    transform:translateX(103%);
    transition:transform .32s var(--ease);
  }
  .nav-drawer[data-open]{transform:translateX(0)}
  .nav{flex-direction:column;align-items:stretch;gap:8px}
  .nav--left{margin-left:0}
  .nav--right{margin-left:0;padding-top:16px;border-top:2px dashed rgba(22,227,214,.4)}
  .nav__link{
    width:100%;
    min-height:52px;
    padding:12px 16px;
    font-size:16px;
    background-color:var(--ink-700);
    border:var(--bw) solid var(--ink-950);
  }
  .nav__link:hover,.nav__link:focus-visible{
    color:var(--ink-950);
    background-color:var(--cyan-400);
    border-bottom-color:var(--ink-950);
  }
  .nav__link[aria-current="page"]{
    background-color:var(--orange-500);
    color:var(--ink-950);
  }
  .header-cta{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    margin-top:20px;
    padding-top:20px;
    border-top:2px solid var(--ink-700);
  }
  .header-cta .btn{width:100%;justify-content:center;font-size:15.5px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1;max-width:none}
}
@media (max-width:960px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
  body{font-size:16px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .header-ticker__meta{display:none}
  .header-ticker{font-size:12px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .footer-copy{margin-right:0}
  .to-top{width:100%;justify-content:center}
  .card:hover,.media:hover{transform:none}
}

/* ---------- 14. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .header-ticker__dot{animation:none}
  .has-js .reveal{opacity:1;transform:none;transition:none}
  .card:hover,.btn:hover,.footer-col__link:hover,.to-top:hover{transform:none}
}

/* ---------- 15. 打印 ---------- */
@media print{
  .site-header,.site-footer,.scroll-progress,.skip-link,.to-top{display:none !important}
  body{background:#fff;color:#000}
  .card,.media,.step{box-shadow:none;border-color:#000}
}