/* ============================================================
   乐天堂中国站 · 共享样式表 /assets/site.css
   深靛蓝档案册体系：刊头 / 页脚 / 通用组件 / 响应式 / 无障碍
   ============================================================ */

:root{
  --ink-indigo:#0E1533;
  --indigo-2:#17204A;
  --night-card:#1B2554;
  --teal:#2FE0C0;
  --teal-deep:#17A98F;
  --gold:#F2B23E;
  --paper:#F4EDE0;
  --paper-2:#E3D9C6;
  --ink:#14161F;
  --muted:#9AA3C0;
  --alert:#E4693B;
  --focus:#FFF4D6;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","Noto Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:rgba(154,163,192,.42);
  --line-soft:rgba(154,163,192,.24);
  --line-teal:rgba(47,224,192,.42);
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-hard:6px 6px 0 rgba(0,0,0,.55);
  --shadow-hard-lg:9px 9px 0 rgba(0,0,0,.55);
  --wrap:1180px;
  --gutter:clamp(18px,4vw,40px);
}

/* ---------- 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-indigo);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.02em;line-height:1.14}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--gold)}
button{font:inherit;color:inherit;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:2px solid var(--line);margin:clamp(24px,4vw,44px) 0}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
::selection{background:var(--teal);color:#04241f}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:760px}

.section{position:relative;padding-block:clamp(44px,7vw,92px)}
.section--tint{background:var(--indigo-2);border-block:2px solid var(--line-soft)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--paper a{color:#0c6b5c}
.section--paper a:hover{color:#8a5a00}

.section__head{display:grid;gap:12px;margin-bottom:clamp(22px,3.5vw,40px)}
.section__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.3em;color:var(--gold);text-transform:uppercase}
.section__title{font-size:clamp(1.7rem,4.6vw,2.9rem)}
.section__lede{max-width:38em;font-size:16px;color:var(--muted)}
.section--paper .section__lede{color:#5a5c69}

.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}

.prose{max-width:38em;font-size:16px;line-height:1.85}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:1.5rem;margin-top:1.9em}
.prose h3{font-size:1.18rem;margin-top:1.6em}
.prose ul{list-style:disc;padding-left:1.35em}
.prose ol{list-style:decimal;padding-left:1.45em}
.prose li{margin-top:.5em}
.prose strong{font-weight:700}
.section--paper .prose{color:var(--ink)}

/* ---------- 通用工具 ---------- */
.mono{font-family:var(--font-mono)}
.note-vert{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.32em;
  color:var(--teal);
  text-transform:uppercase;
}

/* ---------- 跳转链 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-70px;
  z-index:80;
  display:inline-block;
  padding:11px 18px;
  background:var(--gold);
  color:#231703;
  font-weight:700;
  letter-spacing:.06em;
  border:2px solid #231703;
  box-shadow:4px 4px 0 rgba(0,0,0,.5);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;color:#231703}

/* ---------- 刊头 ---------- */
.masthead{
  position:relative;
  background:var(--ink-indigo);
  color:var(--paper);
  border-bottom:2px solid var(--line-soft);
}
.masthead__bar{background:var(--indigo-2);border-bottom:2px solid var(--line-soft)}
.masthead__bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px 22px;
  padding-block:9px;
  font-size:12px;
}
.masthead__edition{font-family:var(--font-mono);letter-spacing:.22em;color:var(--gold)}
.masthead__hint{color:var(--muted);letter-spacing:.14em}

.masthead__core{
  position:relative;
  padding-block:clamp(22px,4vw,34px) clamp(16px,3vw,24px);
  text-align:center;
}
.masthead__brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
  color:var(--paper);
  text-decoration:none;
}
.masthead__brand-main{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.85rem,5.6vw,3.1rem);
  letter-spacing:-.02em;
  line-height:1.05;
  transition:color .18s var(--ease);
}
.masthead__brand:hover .masthead__brand-main{color:var(--teal)}
.masthead__brand-sub{font-size:12px;letter-spacing:.32em;color:var(--muted)}
.masthead__note{margin-top:14px;font-size:14px;color:var(--muted)}
.masthead__vert{
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.32em;
  color:var(--teal);
  opacity:.85;
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin:18px auto 0;
  min-height:48px;
  padding:11px 20px;
  border:2px solid var(--teal);
  background:var(--night-card);
  color:var(--teal);
  font-weight:700;
  font-size:14px;
  letter-spacing:.14em;
  cursor:pointer;
  box-shadow:4px 4px 0 rgba(0,0,0,.5);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{background:var(--teal);color:#062a24}
.nav-toggle[aria-expanded="true"]{background:var(--teal);color:#062a24;border-color:var(--teal)}
.nav-toggle__icon{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__icon span{display:block;height:2px;width:100%;background:currentColor}
.nav-toggle__text{white-space:nowrap}

/* ---------- 主导航 ---------- */
.nav{border-top:2px solid var(--line-soft);background:var(--ink-indigo)}
.nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:2px;padding-block:4px}
.nav__item{display:flex}
.nav__link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:10px 18px;
  color:var(--paper);
  font-size:15px;
  font-weight:500;
  letter-spacing:.06em;
  border-bottom:3px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav__link:hover{color:var(--teal);background:rgba(47,224,192,.09)}
.nav__link[aria-current="page"]{color:var(--teal);border-bottom-color:var(--teal);background:rgba(47,224,192,.12)}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--indigo-2);
  color:var(--paper);
  border-top:2px solid var(--line-teal);
}
.site-foot__inner{
  display:grid;
  grid-template-columns:1.4fr repeat(3,minmax(0,1fr));
  gap:clamp(22px,3vw,44px);
  padding-block:clamp(34px,5vw,64px) clamp(26px,4vw,48px);
}
.site-foot__mark{font-size:clamp(1.35rem,3vw,1.85rem);font-weight:900;letter-spacing:-.02em}
.site-foot__tag{margin-top:12px;font-size:14px;color:var(--muted)}
.site-foot__edition{
  display:inline-block;
  margin-top:16px;
  padding:5px 10px;
  border:2px solid var(--gold);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
}
.foot-col__title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.28em;
  color:var(--teal);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:2px solid var(--line);
}
.foot-col__note{margin-top:16px;font-size:12px;line-height:1.7;color:var(--muted)}
.foot-list__item{padding:6px 0;font-size:15px;color:var(--paper)}
.foot-list__link{
  color:var(--paper);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.foot-list__link:hover{color:var(--teal);border-color:var(--teal)}
.foot-list__key{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--muted)}
.foot-list__val{display:block;font-size:14px;word-break:break-word}
.foot-list__val.mono{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em}

.copy-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  margin-top:12px;
  padding:8px 14px;
  border:2px solid var(--teal);
  background:transparent;
  color:var(--teal);
  font-size:12px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.copy-btn:hover{background:var(--teal);color:#062a24}
.copy-btn:active{transform:translate(1px,1px)}
.copy-status{min-height:1.4em;margin-top:8px;font-size:12px;color:var(--teal)}

.site-foot__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px 26px;
  padding-block:18px 30px;
  border-top:2px solid var(--line-soft);
  font-size:12px;
  color:var(--muted);
}
.site-foot__legal-line{letter-spacing:.06em}
.site-foot__legal-line.mono{letter-spacing:.16em;color:var(--paper)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:12px 24px;
  background:var(--night-card);
  color:var(--paper);
  font-weight:700;
  font-size:15px;
  letter-spacing:.04em;
  text-decoration:none;
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:var(--shadow-hard-lg)}
.btn:active{transform:translate(2px,2px);box-shadow:3px 3px 0 rgba(0,0,0,.5)}
.btn--primary{background:var(--teal);color:#052a24;border-color:#052a24;box-shadow:6px 6px 0 var(--teal-deep)}
.btn--primary:hover{box-shadow:9px 9px 0 var(--teal-deep)}
.btn--gold{background:var(--gold);color:#2a1c02;border-color:#2a1c02;box-shadow:6px 6px 0 rgba(242,178,62,.4)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--paper);box-shadow:6px 6px 0 rgba(244,237,224,.2)}

/* ---------- 卡片与标签 ---------- */
.card{
  position:relative;
  background:var(--night-card);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  padding:clamp(18px,2.4vw,26px);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hard-lg);border-color:var(--line-teal)}
.card--paper{background:var(--paper);color:var(--ink);border-color:var(--ink);box-shadow:6px 6px 0 var(--paper-2)}
.section--paper .card--paper{box-shadow:6px 6px 0 var(--paper-2)}
.card__num{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;color:var(--gold)}
.card__title{margin:10px 0 8px;font-size:1.22rem}
.card__text{font-size:15px;color:var(--muted)}
.card--paper .card__text{color:#4b4e5c}

.tag{
  display:inline-block;
  padding:4px 10px;
  border:2px solid currentColor;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--teal);
  text-transform:uppercase;
}
.tag--gold{color:var(--gold)}
.tag--paper{color:var(--ink)}

/* ---------- 图片容器（供页面阶段放图） ---------- */
.figure{
  border:2px solid var(--line);
  background:var(--night-card);
  box-shadow:var(--shadow-hard);
  overflow:hidden;
}
.figure__frame{
  position:relative;
  display:block;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background:
    repeating-linear-gradient(135deg,rgba(47,224,192,.10) 0 10px,transparent 10px 20px),
    var(--indigo-2);
}
.figure__frame > img,
.figure__frame > svg,
.figure__frame > picture,
.figure__frame > picture > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__caption{
  padding:12px 16px;
  border-top:2px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.figure--wide .figure__frame{aspect-ratio:21 / 9}
.figure--square .figure__frame{aspect-ratio:1 / 1}
.figure--tall .figure__frame{aspect-ratio:3 / 4}
.figure--paper{background:var(--paper);border-color:var(--ink);box-shadow:6px 6px 0 var(--paper-2)}
.figure--paper .figure__frame{background:repeating-linear-gradient(135deg,rgba(20,22,31,.08) 0 10px,transparent 10px 20px),var(--paper-2)}
.figure--paper .figure__caption{color:#4b4e5c;border-top-color:var(--paper-2)}

/* ---------- 分段切换 ---------- */
.tabs{margin-top:clamp(18px,3vw,28px)}
.tablist{display:flex;flex-wrap:wrap;gap:6px;border-bottom:2px solid var(--line)}
.tab{
  min-height:46px;
  padding:10px 18px;
  border:2px solid var(--line);
  border-bottom:none;
  background:transparent;
  color:var(--paper);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.tab:hover{border-color:var(--line-teal);color:var(--teal)}
.tab[aria-selected="true"]{background:var(--teal);border-color:var(--teal);color:#052a24}
.section--paper .tab{color:var(--ink);border-color:var(--paper-2)}
.section--paper .tab[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.tabpanel{padding-top:clamp(18px,3vw,26px)}
.tabpanel[hidden]{display:none}
.tabpanel.is-entering{animation:ltPanelIn .22s var(--ease) both}
@keyframes ltPanelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:14px}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--muted)}
.breadcrumb__link{color:var(--muted);border-bottom:1px solid var(--line)}
.breadcrumb__link:hover{color:var(--teal);border-color:var(--teal)}
.breadcrumb__sep{color:var(--teal)}
.breadcrumb__current{color:var(--gold)}

/* ---------- 滚动进度细竖线（JS 注入） ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  bottom:0;
  left:0;
  width:3px;
  z-index:70;
  pointer-events:none;
  background:linear-gradient(180deg,var(--teal),var(--gold));
  transform:scaleY(var(--lt-progress,0));
  transform-origin:top center;
  transition:transform .12s linear;
}

/* ---------- 显现动画 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .masthead__vert{display:none}
}
@media (max-width:960px){
  .site-foot__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-foot__brand{grid-column:1 / -1}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:880px){
  .nav-toggle{display:inline-flex}
  .nav{
    border-top:2px solid var(--line-teal);
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .24s var(--ease),opacity .18s var(--ease),visibility .24s linear;
  }
  .nav[data-open]{max-height:620px;opacity:1;visibility:visible}
  .nav__list{flex-direction:column;gap:0;padding-block:8px 14px;align-items:stretch}
  .nav__item{display:block}
  .nav__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    width:100%;
    padding:14px 16px;
    border-bottom:2px solid var(--line-soft);
    border-left:3px solid transparent;
  }
  .nav__link::after{content:"›";font-family:var(--font-mono);color:var(--teal)}
  .nav__link:hover{border-left-color:var(--teal);background:rgba(47,224,192,.09)}
  .nav__link[aria-current="page"]{border-bottom-color:var(--line-soft);border-left-color:var(--teal)}
  .grid--2,.grid--3{grid-template-columns:1fr}
}
@media (max-width:620px){
  body{font-size:15.5px;line-height:1.8}
  .site-foot__inner{grid-template-columns:1fr;gap:26px}
  .site-foot__brand{grid-column:auto}
  .masthead__bar-inner{justify-content:flex-start;letter-spacing:.1em}
  .masthead__hint{display:none}
  .skip-link{left:10px;right:10px;text-align:center}
}

/* ---------- 无障碍与减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  @keyframes ltPanelIn{from{opacity:0}to{opacity:1}}
  .has-js [data-reveal]{opacity:1;transform:none}
  .btn:hover,.card:hover{transform:none}
  .scroll-progress{transition:none}
}