/* ==========================================================================
   皇家国际站 · 共享样式表 /assets/site.css
   深钴蓝底色 + 香槟金描边 + 琥珀橙交互反馈
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --royal-deep:#0B1E4B;
  --royal-core:#16357F;
  --royal-bright:#2A55C8;
  --champagne:#C9A86A;
  --champagne-light:#E7D5A9;
  --amber:#E08A2E;
  --warm-white:#F6F2EA;
  --ink:#0E1116;
  --slate:#5C6B8A;
  --gold-deep:#8C6A2F;

  --muted:#A6B2CE;          /* 深钴蓝底上的次级信息 */
  --muted-ink:#5C6B8A;      /* 暖白底上的次级信息 */
  --line:rgba(201,168,106,.40);
  --line-soft:rgba(201,168,106,.22);

  --shadow-hard:6px 6px 0 rgba(140,106,47,.55);
  --shadow-hard-ink:6px 6px 0 rgba(11,30,75,.18);

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  --font-sans:"Noto Sans SC","Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:ui-monospace,"SFMono-Regular","Menlo","Consolas","Liberation Mono",monospace;

  --maxw:1240px;
  --gutter:clamp(16px,4vw,32px);
  --nav-break:1023px;
}

/* ---------- 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,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{max-width:100%;}
img{height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
a{color:var(--champagne);text-decoration-thickness:1px;text-underline-offset:3px;}
table{border-collapse:collapse;width:100%;}
hr{border:0;border-top:1px solid var(--line);}

/* ---------- 3. 基础排版 ---------- */
body{
  display:flex;
  flex-direction:column;
  min-height:100vh;
  background:var(--royal-deep);
  color:var(--warm-white);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-serif);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--warm-white);
}
h1{font-size:clamp(2.6rem,6vw,5rem);font-weight:900;}
h2{font-size:clamp(1.5rem,2.6vw,1.8rem);}
h3{font-size:1.15rem;line-height:1.35;}
h4{font-size:1rem;line-height:1.4;}
p{max-width:68ch;}
strong{font-weight:700;color:var(--champagne-light);}
::selection{background:var(--amber);color:var(--ink);}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:1px;}
[hidden]{display:none !important;}

.royal-serif{font-family:var(--font-serif);}
.royal-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.01em;}
.royal-muted{color:var(--muted);}

/* ---------- 4. 跳转链接 ---------- */
.royal-skip{
  position:absolute;
  top:-80px;
  left:12px;
  z-index:140;
  padding:10px 18px;
  background:var(--amber);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(11,30,75,.5);
  transition:top .2s ease;
}
.royal-skip:focus{top:8px;}

/* ---------- 5. 头部 ---------- */
.royal-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--royal-deep);
  color:var(--warm-white);
  border-bottom:2px solid var(--champagne);
}
.royal-header__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
}

/* 品牌 */
.royal-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:2px 0;
  color:var(--champagne);
  text-decoration:none;
  flex:none;
}
.royal-brand__mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  flex:none;
  color:var(--champagne);
  border:2px solid var(--champagne);
  background:rgba(22,53,127,.55);
  box-shadow:3px 3px 0 rgba(140,106,47,.6);
  transition:border-color .2s ease,color .2s ease;
}
.royal-brand__mark svg{display:block;}
.royal-brand:hover .royal-brand__mark,
.royal-brand:focus-visible .royal-brand__mark{border-color:var(--amber);color:var(--amber);}
.royal-brand__text{display:flex;flex-direction:column;line-height:1.2;}
.royal-brand__name{
  font-family:var(--font-serif);
  font-size:1.15rem;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--warm-white);
}
.royal-brand__sub{
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* 导航 */
.royal-nav{margin-left:auto;}
.royal-nav__list{display:flex;flex-wrap:wrap;align-items:center;gap:2px;}
.royal-nav__item{display:block;}
.royal-nav__link{
  position:relative;
  display:block;
  padding:8px 14px 11px 15px;
  font-family:var(--font-sans);
  font-size:14px;
  letter-spacing:.06em;
  color:var(--warm-white);
  text-decoration:none;
  transition:color .2s ease;
}
.royal-nav__link::before{
  content:"";
  position:absolute;
  left:2px;
  top:50%;
  width:4px;
  height:4px;
  margin-top:-2px;
  background:var(--champagne);
  opacity:0;
  transition:opacity .2s ease,background-color .2s ease;
}
.royal-nav__link::after{
  content:"";
  position:absolute;
  left:15px;
  right:14px;
  bottom:4px;
  height:2px;
  background:var(--champagne);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease,background-color .2s ease;
}
.royal-nav__link:hover,
.royal-nav__link:focus-visible{color:var(--champagne-light);}
.royal-nav__link:hover::after,
.royal-nav__link:focus-visible::after{transform:scaleX(1);}
.royal-nav__link[aria-current="page"]{color:var(--champagne-light);}
.royal-nav__link[aria-current="page"]::before{opacity:1;background:var(--amber);}
.royal-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--amber);}

/* 移动导航按钮 */
.royal-nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 14px;
  color:var(--champagne-light);
  font-size:13px;
  letter-spacing:.1em;
  border:2px solid var(--champagne);
  background:rgba(22,53,127,.5);
  transition:border-color .2s ease,color .2s ease;
}
.royal-nav-toggle__bars{display:grid;gap:4px;width:18px;}
.royal-nav-toggle__bars span{
  display:block;
  height:2px;
  background:var(--champagne);
  transition:transform .22s ease,background-color .2s ease;
}
.royal-nav-toggle[aria-expanded="true"]{border-color:var(--amber);color:var(--amber);}
.royal-nav-toggle[aria-expanded="true"] .royal-nav-toggle__bars span{background:var(--amber);}
.royal-nav-toggle[aria-expanded="true"] .royal-nav-toggle__bars span:first-child{transform:translateY(6px) rotate(45deg);}
.royal-nav-toggle[aria-expanded="true"] .royal-nav-toggle__bars span:last-child{transform:translateY(-6px) rotate(-45deg);}

/* 头部 CTA */
.royal-header__cta{margin-left:6px;flex:none;white-space:nowrap;}

/* 头部次级信息 */
.royal-header__utility{border-top:1px solid var(--line-soft);}
.royal-header__utility-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:5px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.royal-header__tick{display:block;width:22px;height:2px;background:var(--champagne);flex:none;}

/* 阅读进度 */
.royal-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:3px;
  background:rgba(246,242,234,.10);
  overflow:hidden;
}
.royal-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--champagne),var(--amber));
  transition:width .1s linear;
}

/* ---------- 6. 按钮 ---------- */
.royal-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  text-decoration:none;
  color:var(--champagne-light);
  background:transparent;
  border:2px solid var(--champagne);
  box-shadow:4px 4px 0 rgba(140,106,47,.5);
  transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.royal-btn:hover,
.royal-btn:focus-visible{
  color:var(--warm-white);
  border-color:var(--amber);
  box-shadow:6px 6px 0 rgba(140,106,47,.75);
  transform:translate(-1px,-1px);
}
.royal-btn--gold{background:var(--champagne);color:var(--royal-deep);font-weight:700;}
.royal-btn--gold:hover,
.royal-btn--gold:focus-visible{background:var(--amber);color:var(--ink);border-color:var(--amber);}
.royal-btn--ghost{
  border-color:var(--line);
  color:var(--muted);
  box-shadow:none;
}
.royal-btn--ghost:hover,
.royal-btn--ghost:focus-visible{color:var(--champagne-light);border-color:var(--amber);box-shadow:none;}

/* ---------- 7. 容器与主区 ---------- */
.royal-main{
  display:block;
  flex:1 0 auto;
  width:100%;
  background:var(--royal-deep);
  color:var(--warm-white);
}
.royal-container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.royal-section{padding:clamp(40px,6vw,72px) 0;scroll-margin-top:150px;}
.royal-section + .royal-section{border-top:1px solid var(--line-soft);}

.royal-eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-family:var(--font-sans);
  font-size:13px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--champagne);
}
.royal-eyebrow::before{content:"";display:block;width:28px;height:2px;background:var(--champagne);flex:none;}

.royal-divider{
  height:0;
  border:0;
  border-top:2px solid var(--line);
  margin:0;
}

/* ---------- 8. 网格 ---------- */
.royal-grid{display:grid;gap:24px;}
.royal-grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.royal-grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.royal-grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}

/* ---------- 9. 卡片 ---------- */
.royal-card{
  position:relative;
  padding:22px;
  background:var(--royal-core);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  color:var(--warm-white);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.royal-card:hover,
.royal-card:focus-within{border-color:var(--amber);box-shadow:8px 8px 0 rgba(140,106,47,.7);}
.royal-card__title{
  font-family:var(--font-serif);
  font-size:1.15rem;
  font-weight:800;
  line-height:1.35;
  color:var(--warm-white);
  margin-bottom:8px;
}
.royal-card__text{font-size:15.5px;color:var(--muted);max-width:52ch;}
.royal-card__meta{
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--line-soft);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--slate);
}

/* ---------- 10. 旁注与标签 ---------- */
.royal-note{
  padding-left:16px;
  border-left:2px solid var(--champagne);
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
}
.royal-note strong{color:var(--champagne-light);}
.royal-tag{
  display:inline-block;
  padding:3px 10px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--champagne-light);
  border:1px solid var(--line);
  background:rgba(11,30,75,.5);
}

/* ---------- 11. 面包屑 ---------- */
.royal-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--muted);
}
.royal-breadcrumb a{color:var(--champagne);text-decoration:none;}
.royal-breadcrumb a:hover{color:var(--amber);text-decoration:underline;}
.royal-breadcrumb__sep{color:var(--slate);}

/* ---------- 12. 图片容器 ---------- */
.royal-media{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--royal-core);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.royal-media img,
.royal-media svg,
.royal-media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.royal-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(201,168,106,.25);
}
.royal-media--wide{aspect-ratio:16 / 9;}
.royal-media--square{aspect-ratio:1 / 1;}
.royal-media--tall{aspect-ratio:3 / 4;}
.royal-media--placeholder{
  background-image:repeating-linear-gradient(135deg,rgba(201,168,106,.12) 0 10px,rgba(11,30,75,0) 10px 20px);
}
.royal-media__caption{
  display:block;
  margin-top:10px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--muted);
}

/* ---------- 13. 浅色分区 ---------- */
.royal-panel--light{
  background:var(--warm-white);
  color:var(--ink);
}
.royal-panel--light h1,
.royal-panel--light h2,
.royal-panel--light h3,
.royal-panel--light h4{color:var(--royal-deep);}
.royal-panel--light a{color:var(--gold-deep);}
.royal-panel--light a:hover{color:var(--amber);}
.royal-panel--light .royal-muted{color:var(--muted-ink);}
.royal-panel--light .royal-card{
  background:#FFFFFF;
  border-color:rgba(11,30,75,.16);
  box-shadow:var(--shadow-hard-ink);
  color:var(--ink);
}
.royal-panel--light .royal-card__title{color:var(--royal-deep);}
.royal-panel--light .royal-card__text{color:var(--muted-ink);}
.royal-panel--light .royal-card__meta{color:var(--slate);border-top-color:rgba(11,30,75,.14);}
.royal-panel--light .royal-note{color:var(--muted-ink);border-left-color:var(--gold-deep);}
.royal-panel--light .royal-note strong{color:var(--gold-deep);}
.royal-panel--light .royal-tag{color:var(--gold-deep);border-color:rgba(11,30,75,.2);background:rgba(11,30,75,.04);}
.royal-panel--light .royal-eyebrow{color:var(--gold-deep);}
.royal-panel--light .royal-eyebrow::before{background:var(--gold-deep);}
.royal-panel--light .royal-divider{border-top-color:rgba(11,30,75,.16);}

/* ---------- 14. 滚动显现 ---------- */
.royal-js [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .24s ease,transform .24s ease;
}
.royal-js [data-reveal].is-visible{opacity:1;transform:none;}
.royal-js.royal-static [data-reveal]{opacity:1;transform:none;transition:none;}

/* 章节高亮 */
[data-chapter-link]{transition:color .2s ease,border-color .2s ease;}
[data-chapter-link].is-active{color:var(--amber);border-color:var(--amber);}
[data-chapter-link].is-active::before{background:var(--amber);}

/* ---------- 15. 页脚 ---------- */
.royal-footer{
  margin-top:auto;
  background:var(--royal-deep);
  border-top:2px solid var(--champagne);
  color:var(--warm-white);
}
.royal-footer__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(36px,5vw,60px) var(--gutter) 0;
}
.royal-footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:32px 28px;
}
.royal-footer__brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.royal-footer__brand .royal-brand__mark{
  width:38px;
  height:38px;
  box-shadow:3px 3px 0 rgba(140,106,47,.5);
}
.royal-footer__brand-name{
  font-family:var(--font-serif);
  font-size:1.1rem;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--warm-white);
}
.royal-footer__note{
  font-size:13.5px;
  line-height:1.75;
  color:var(--muted);
  max-width:38ch;
}
.royal-footer__title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-sans);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--champagne);
}
.royal-footer__list{display:grid;gap:8px;}
.royal-footer__link{
  font-size:14px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.royal-footer__link:hover,
.royal-footer__link:focus-visible{color:var(--champagne-light);border-bottom-color:var(--amber);}
.royal-footer__link--inline{font-size:12.5px;}
.royal-footer__text{font-size:14px;color:var(--muted);line-height:1.7;}
.royal-footer__bottom{
  margin-top:clamp(28px,4vw,44px);
  padding:16px 0 22px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
}
.royal-footer__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  font-size:12.5px;
  line-height:1.7;
  color:var(--slate);
  max-width:70ch;
}
.royal-footer__legal{color:var(--muted);}
.royal-footer__sep{color:rgba(201,168,106,.5);}

/* ---------- 16. 返回顶部 ---------- */
.royal-to-top{
  position:fixed;
  right:clamp(14px,3vw,26px);
  bottom:clamp(14px,3vw,26px);
  z-index:70;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  font-size:18px;
  line-height:1;
  color:var(--royal-deep);
  background:var(--champagne);
  border:2px solid var(--royal-deep);
  box-shadow:4px 4px 0 rgba(140,106,47,.65);
  text-decoration:none;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,background-color .2s ease;
}
.royal-to-top[data-open]{opacity:1;visibility:visible;transform:none;}
.royal-to-top:hover,
.royal-to-top:focus-visible{background:var(--amber);}

/* ---------- 17. 平板 ---------- */
@media (max-width:1023px){
  .royal-header__inner{flex-wrap:wrap;}
  .royal-nav-toggle{display:inline-flex;}
  .royal-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    margin-left:0;
    padding:8px var(--gutter) 18px;
    background:var(--royal-core);
    border-top:1px solid var(--line-soft);
    border-bottom:2px solid var(--champagne);
    box-shadow:0 12px 0 rgba(11,30,75,.45);
    max-height:70vh;
    overflow-y:auto;
  }
  .royal-nav[data-open]{display:block;}
  .royal-nav__list{flex-direction:column;align-items:stretch;gap:0;}
  .royal-nav__link{
    padding:14px 12px 14px 18px;
    font-size:15px;
    border-bottom:1px solid var(--line-soft);
  }
  .royal-nav__link::after{left:18px;right:auto;width:34px;bottom:8px;}
  .royal-nav__link::before{left:4px;width:6px;height:6px;margin-top:-3px;}
  .royal-header__cta{margin-left:auto;}
  .royal-header__utility{display:none;}
  .royal-footer__grid{grid-template-columns:1fr 1fr;}
  .royal-grid--12,
  .royal-grid--3,
  .royal-grid--2{grid-template-columns:1fr;}
}

/* ---------- 18. 手机 ---------- */
@media (max-width:640px){
  body{font-size:16px;}
  .royal-brand__sub{display:none;}
  .royal-brand__mark{width:38px;height:38px;}
  .royal-brand__name{font-size:1.05rem;}
  .royal-header__cta{padding:9px 12px;font-size:13px;letter-spacing:.04em;}
  .royal-nav-toggle{padding:9px 11px;font-size:12px;}
  .royal-footer__grid{grid-template-columns:1fr;gap:28px;}
  .royal-footer__bottom{flex-direction:column;align-items:flex-start;}
  .royal-card{padding:18px;}
  .royal-media{box-shadow:4px 4px 0 rgba(140,106,47,.5);}
}

/* ---------- 19. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .royal-skip,
  .royal-btn,
  .royal-nav__link,
  .royal-card,
  .royal-brand__mark,
  .royal-footer__link,
  .royal-nav-toggle,
  .royal-nav-toggle__bars span{transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
  .royal-btn:hover,
  .royal-btn:focus-visible{transform:none;box-shadow:4px 4px 0 rgba(140,106,47,.5);}
  .royal-nav__link::after{transition:none;}
  .royal-js [data-reveal],
  .royal-js [data-reveal].is-visible{opacity:1;transform:none;transition:none;}
  .royal-progress__bar{transition:none;}
  .royal-to-top{transition:opacity .2s ease,visibility .2s ease,background-color .2s ease;transform:none;}
  .royal-to-top[data-open]{transform:none;}
}