/* ============================================================
   尊龙旗舰厅 · 共享站点样式 /assets/site.css
   夜间旗舰厅 · 墨黑＋暗金 · 分区色语义化
   ============================================================ */

/* ---------- 01 重置 ---------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:120px;
}

body{
  margin:0;
  background-color:#0A0B0D;
  background-image:
    radial-gradient(1200px 620px at 78% -12%, rgba(198,161,91,.075), transparent 62%),
    radial-gradient(920px 540px at 4% 108%, rgba(92,135,168,.065), transparent 60%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:#F3F0E9;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:1.0625rem;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,
svg,
video{ display:block; max-width:100%; }

a{ color:#C6A15B; text-decoration:none; }

h1,h2,h3,h4,h5{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-weight:700;
  line-height:1.25;
  letter-spacing:.01em;
}

p,ul,ol,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }

button{
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  cursor:pointer;
}

table{ border-collapse:collapse; width:100%; }

::selection{
  background:#C6A15B;
  color:#0A0B0D;
}

/* ---------- 02 变量 ---------- */
:root{
  --void:#0A0B0D;
  --char:#15171C;
  --gold:#C6A15B;
  --gold-hi:#EBD08A;
  --ochre:#A9552F;
  --blue:#5C87A8;
  --mist:#F3F0E9;
  --stone:#9C978D;
  --glass:rgba(255,255,255,.06);
  --line-deep:#6E5A2E;
  --line-soft:rgba(110,90,46,.42);
  --line-hair:rgba(198,161,91,.22);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-head:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-en:"Arial Narrow","Helvetica Neue",Helvetica,Arial,system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --gutter:clamp(20px,4vw,48px);
}

/* ---------- 03 无障碍 ---------- */
:focus-visible{
  outline:2px solid var(--gold-hi);
  outline-offset:3px;
  border-radius:2px;
}

.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:10px 20px;
  background:var(--gold);
  color:#0A0B0D;
  font-family:var(--font-head);
  font-weight:700;
  font-size:.875rem;
  letter-spacing:.08em;
  border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{ top:12px; }

.sr-only{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 04 布局容器与栅格 ---------- */
.container{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}

@media (min-width:1181px) and (max-width:1440px){
  .container{ padding-left:112px; }
}

.grid{
  display:grid;
  gap:clamp(20px,3vw,40px);
}
.grid--7-5{ grid-template-columns:7fr 5fr; }
.grid--8-4{ grid-template-columns:8fr 4fr; }
.grid--5-3-4{ grid-template-columns:5fr 3fr 4fr; }

@media (max-width:900px){
  .grid--7-5,
  .grid--8-4,
  .grid--5-3-4{ grid-template-columns:1fr; }
}

.stack{ display:flex; flex-direction:column; gap:clamp(14px,2vw,22px); }

/* ---------- 05 排版辅助 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(3.2rem,9vw,7.5rem);
  line-height:.95;
  letter-spacing:.02em;
  color:var(--mist);
}

.eyebrow{
  display:inline-block;
  font-family:var(--font-en);
  font-size:.82rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.3em;
  color:var(--stone);
}

.lede{
  max-width:68ch;
  font-size:1.0625rem;
  line-height:1.8;
  color:rgba(243,240,233,.82);
}

.meta{
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.06em;
  color:var(--stone);
}

.accent-ochre{ color:var(--ochre); }
.accent-blue{ color:var(--blue); }
.accent-gold{ color:var(--gold); }

/* ---------- 06 阅读进度 ---------- */
.read-progress{
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  pointer-events:none;
  background:transparent;
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--line-deep),var(--gold) 55%,var(--gold-hi));
  transition:width .12s linear;
}

/* ---------- 07 刊头 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  backdrop-filter:blur(18px) saturate(130%);
  border-bottom:1px solid var(--line-deep);
}

.masthead__bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  min-height:98px;
  padding-block:18px;
  transition:min-height .3s var(--ease), padding .3s var(--ease);
}

.masthead.is-tight .masthead__bar{
  min-height:64px;
  padding-block:8px;
}
.masthead.is-tight .brand__cn{
  font-size:1.15rem;
  letter-spacing:.1em;
}
.masthead.is-tight .brand__en{ opacity:.55; }
.masthead.is-tight .primary-nav__list{ padding-block:6px; }

/* ---------- 08 品牌 ---------- */
.brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-self:center;
  gap:4px;
  color:var(--mist);
  text-decoration:none;
}
.brand__cn{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.35rem,2.4vw,1.95rem);
  line-height:1.08;
  letter-spacing:.14em;
  color:var(--mist);
  transition:font-size .3s var(--ease), letter-spacing .3s var(--ease);
}
.brand__en{
  font-family:var(--font-en);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--stone);
  transition:opacity .3s var(--ease);
}
.brand:hover .brand__cn{ color:var(--gold-hi); }

.brand--footer{
  align-items:flex-start;
  justify-self:start;
}
.brand--footer .brand__en{ letter-spacing:.28em; }

/* ---------- 09 刊头工具位 ---------- */
.masthead__tools{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(10px,1.6vw,20px);
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.04em;
  justify-self:end;
}
.tool{
  color:var(--stone);
  text-decoration:none;
  white-space:nowrap;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease), border-color .2s var(--ease);
}
.tool:hover{
  color:var(--gold-hi);
  border-bottom-color:var(--gold);
}
.tool--quiet{
  color:var(--stone);
  opacity:.66;
}
.tool--lang{
  color:var(--stone);
  letter-spacing:.18em;
}

@media (max-width:1100px){
  .tool--quiet{ display:none; }
}

/* ---------- 10 主导航 ---------- */
.primary-nav{
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg, rgba(21,23,28,.55), transparent);
}
.primary-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(10px,2.6vw,36px);
  padding-block:12px;
}
.primary-nav__list a{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-family:var(--font-head);
  font-size:.95rem;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.primary-nav__list a::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:0;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s var(--ease);
}
.primary-nav__list a:hover{ color:var(--mist); }
.primary-nav__list a:hover::after,
.primary-nav__list a[aria-current="page"]::after{ transform:scaleX(1); }
.primary-nav__list a[aria-current="page"]{ color:var(--gold-hi); }

/* ---------- 11 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  visibility:hidden;
  pointer-events:none;
  align-items:center;
  gap:10px;
  padding:9px 16px;
  border:1px solid var(--line-deep);
  border-radius:999px;
  background:var(--glass);
  color:var(--mist);
  font-family:var(--font-head);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.18em;
  transition:border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.nav-toggle:hover{
  border-color:var(--gold);
  color:var(--gold-hi);
}
.nav-toggle__lines{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__lines::before,
.nav-toggle__lines::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .24s var(--ease);
}
.nav-toggle__lines::before{ top:1px; }
.nav-toggle__lines::after{ bottom:1px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines::before{
  transform:translateY(3.2px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines::after{
  transform:translateY(-3.2px) rotate(-45deg);
}

/* ---------- 12 徽章索引 ---------- */
.badge-rail{
  position:fixed;
  left:14px;
  top:50%;
  transform:translateY(-50%);
  z-index:70;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:10px 6px;
  border:1px solid var(--line-deep);
  border-radius:999px;
  background:rgba(10,11,13,.62);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.badge{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:1px;
  width:52px;
  height:52px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:var(--glass);
  color:var(--stone);
  text-decoration:none;
  font-family:var(--font-head);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.08em;
  transition:color .24s var(--ease), background .24s var(--ease), border-color .24s var(--ease);
}
.badge__num{
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.04em;
  opacity:.66;
}
.badge:hover{
  color:var(--gold-hi);
  border-color:var(--gold);
}
.badge[aria-current="page"]{
  background:var(--gold);
  border-color:var(--gold);
  color:#0A0B0D;
}
.badge[aria-current="page"] .badge__num{ opacity:.75; }

/* ---------- 13 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 28px;
  font-family:var(--font-head);
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--gold-hi);
  background:transparent;
  border:1px solid var(--gold);
  border-radius:999px;
  text-decoration:none;
  transition:background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}
.btn:hover{
  background:var(--gold);
  border-color:var(--gold);
  color:#0A0B0D;
}
.btn--solid{
  background:var(--gold);
  border-color:var(--gold);
  color:#0A0B0D;
}
.btn--solid:hover{
  background:var(--gold-hi);
  border-color:var(--gold-hi);
  color:#0A0B0D;
}
.btn--ghost{
  border-color:rgba(243,240,233,.26);
  color:var(--mist);
}
.btn--ghost:hover{
  background:transparent;
  border-color:var(--gold);
  color:var(--gold-hi);
}

/* ---------- 14 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.06em;
  color:var(--stone);
}
.breadcrumb li{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.breadcrumb li + li::before{
  content:"/";
  color:var(--line-deep);
}
.breadcrumb a{
  color:var(--stone);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.breadcrumb a:hover{ color:var(--gold-hi); }
.breadcrumb [aria-current="page"]{ color:var(--mist); }

/* ---------- 15 章节与内容块 ---------- */
.section{
  position:relative;
  padding-block:clamp(48px,7vw,104px);
}
.section--tight{ padding-block:clamp(32px,4vw,56px); }

.section__num{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:.82rem;
  letter-spacing:.16em;
  color:var(--gold);
  transition:color .24s var(--ease);
}
.section__num::after{
  content:"";
  display:block;
  width:48px;
  height:1px;
  background:var(--line-deep);
}

[data-chapter].is-current .section__num{ color:var(--gold-hi); }
[data-chapter].is-current .section__num::after{ background:var(--gold-hi); }

.panel{
  background:var(--char);
  border:1px solid var(--line-soft);
  border-radius:2px;
  padding:clamp(20px,2.6vw,32px);
}
.panel--glass{
  background:var(--glass);
  border:1px solid rgba(198,161,91,.4);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,var(--line-deep),transparent);
  margin-block:clamp(24px,4vw,48px);
}

/* ---------- 16 数据带 ---------- */
.data-band{
  border-block:1px solid var(--line-deep);
  background:linear-gradient(180deg, #15171C, #0E1013);
  padding-block:clamp(24px,3.4vw,42px);
}
.data-band__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.5vw,30px);
}
.data-band__value{
  font-family:var(--font-mono);
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1;
  letter-spacing:.02em;
  color:var(--gold-hi);
}
.data-band__label{
  margin-top:10px;
  font-size:.82rem;
  letter-spacing:.06em;
  color:var(--stone);
}
@media (max-width:760px){
  .data-band__grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}

/* ---------- 17 媒体占位 ---------- */
.media{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border:1px solid var(--line-deep);
  border-radius:2px;
  background:
    linear-gradient(152deg, #1A1D23 0%, #0A0B0D 58%, #121419 100%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(115deg, rgba(198,161,91,.14) 0 1px, transparent 1px) 0 0 / 100% 100%,
    radial-gradient(120% 90% at 78% 8%, rgba(198,161,91,.16), transparent 58%),
    radial-gradient(110% 80% at 10% 96%, rgba(92,135,168,.14), transparent 60%);
  pointer-events:none;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(10,11,13,0) 42%, rgba(10,11,13,.8) 100%);
  pointer-events:none;
}
.media > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.72) brightness(.72) contrast(1.06);
}
.media--16x9{ aspect-ratio:16 / 9; }
.media--21x9{ aspect-ratio:21 / 9; }
.media--4x5{ aspect-ratio:4 / 5; }
.media--square{ aspect-ratio:1 / 1; }
.media--tall{ aspect-ratio:3 / 4; }

.media__caption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--stone);
}

/* ---------- 18 进入视口动效 ---------- */
[data-reveal].is-armed{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease), transform .32s var(--ease);
}
[data-reveal].is-armed.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 19 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:linear-gradient(180deg, #15171C 0%, #101216 100%);
  border-top:1px solid var(--line-deep);
  padding-top:clamp(40px,6vw,72px);
  padding-bottom:clamp(28px,4vw,44px);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--gold) 18%, var(--line-deep) 50%, transparent);
  opacity:.7;
}

.site-footer__top{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:clamp(28px,5vw,64px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--line-soft);
}

.site-footer__brand{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.site-footer__tagline{
  max-width:34ch;
  font-size:.95rem;
  line-height:1.7;
  color:var(--stone);
}

.site-footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,32px);
}
.site-footer__col ul{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.site-footer__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:.74rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
}
.site-footer__col a{
  font-size:.95rem;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.site-footer__col a:hover{ color:var(--gold-hi); }

.site-footer__contact{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 24px;
  padding-block:clamp(20px,3vw,30px);
  border-bottom:1px solid var(--line-soft);
}
.site-footer__contact-line,
.site-footer__addr{
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.04em;
  color:var(--stone);
}
.site-footer__addr{ color:rgba(156,151,141,.72); }

.site-footer__legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:6px 18px;
  padding-top:clamp(18px,2.6vw,26px);
  text-align:center;
}
.site-footer__legal-line{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  color:rgba(156,151,141,.78);
}

@media (max-width:900px){
  .site-footer__top{ grid-template-columns:1fr; }
  .site-footer__cols{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (max-width:560px){
  .site-footer__cols{ grid-template-columns:1fr; gap:26px; }
  .site-footer__legal{ flex-direction:column; }
}

/* ---------- 20 响应式：移动导航 ---------- */
@media (max-width:900px){
  .masthead__bar{
    grid-template-columns:1fr auto;
    gap:12px;
    min-height:72px;
    padding-block:12px;
  }
  .brand{
    grid-column:1;
    grid-row:1;
    justify-self:start;
    align-items:flex-start;
  }
  .brand__cn{
    font-size:1.2rem;
    letter-spacing:.1em;
  }
  .brand__en{
    font-size:.6rem;
    letter-spacing:.24em;
  }
  .nav-toggle{
    grid-column:2;
    grid-row:1;
    justify-self:end;
    display:inline-flex;
    visibility:visible;
    pointer-events:auto;
  }
  .masthead__tools{ display:none; }

  .primary-nav{
    display:none;
    border-top:1px solid var(--line-soft);
    background:var(--char);
  }
  .primary-nav[data-open]{
    display:block;
  }
  .primary-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding-block:6px 12px;
  }
  .primary-nav__list a{
    display:block;
    padding:14px 4px;
    font-size:1rem;
    letter-spacing:.1em;
    color:var(--mist);
    border-bottom:1px solid rgba(110,90,46,.24);
  }
  .primary-nav__list li:last-child a{ border-bottom:0; }
  .primary-nav__list a::after{ display:none; }
  .primary-nav__list a[aria-current="page"]{
    color:var(--gold-hi);
    border-left:2px solid var(--gold);
    padding-left:12px;
  }
}

/* ---------- 21 响应式：徽章索引转底部胶囊 ---------- */
@media (max-width:1180px){
  body{
    padding-bottom:calc(84px + env(safe-area-inset-bottom, 0px));
  }
  .badge-rail{
    top:auto;
    bottom:calc(14px + env(safe-area-inset-bottom, 0px));
    left:50%;
    transform:translateX(-50%);
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:4px;
    width:calc(100% - 28px);
    max-width:440px;
    padding:6px;
    border-radius:999px;
  }
  .badge{
    flex:1 1 0;
    width:auto;
    height:38px;
    flex-direction:row;
    gap:4px;
    font-size:.72rem;
    letter-spacing:.04em;
  }
  .badge__num{ display:none; }
}

/* ---------- 22 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;
  }
  [data-reveal].is-armed{
    opacity:1;
    transform:none;
  }
}