/* ==========================================================================
   易游中心 — 共享 Site Kit /assets/site.css
   暖纸 + 深靛 + 暮橙；报头导航；清单式组件
   ========================================================================== */

/* ---------- 1. tokens ---------- */
:root{
  --ink:#14181F;
  --indigo:#1B2A4A;
  --indigo-deep:#101B31;
  --orange:#E8753B;
  --orange-dark:#D2602A;
  --orange-soft:#F3C6A5;
  --porcelain:#FBF8F2;
  --paper:#F6EFE3;
  --copper:#B98A4B;
  --celadon:#6C7A86;
  --teal:#123B3A;
  --line:#DDD3C4;
  --line-copper:rgba(185,138,75,.42);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --fs-body:clamp(1rem, .96rem + .2vw, 1.0625rem);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;

  --wrap:1180px;
  --gutter:clamp(1rem, 4vw, 2.5rem);
  --shadow-soft:0 20px 46px -30px rgba(20,24,31,.6);
  --dur:260ms;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  background-color:var(--paper);
  background-image:
    linear-gradient(to right, rgba(185,138,75,.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(185,138,75,.09) 1px, transparent 1px);
  background-size:112px 112px;
  background-position:center top;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:600;line-height:1.2;letter-spacing:-.01em;color:var(--indigo)}
h1{font-size:clamp(2rem,4vw,3.4rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.2rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.5rem)}
h4{font-size:1.05rem}
p{text-wrap:pretty}

.mono{font-family:var(--font-mono);letter-spacing:.06em}

:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:6px}

::selection{background:var(--orange-soft);color:var(--ink)}

/* ---------- 4. 布局骨架 ---------- */
.wrap{width:min(var(--wrap), calc(100% - var(--gutter) * 2));margin-inline:auto}
.page-shell{padding-block:clamp(1.5rem,3vw,2.75rem)}
.section{padding-block:clamp(2rem,5vw,4rem)}
.content-col{max-width:72ch}
.stack{display:flow-root}
.stack > * + *{margin-top:var(--stack-gap,1rem)}
.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(215px,1fr))}
.rule{height:1px;background:var(--line);border:0;margin:0}
.rule--copper{background:var(--line-copper)}

/* ---------- 5. skip link / 进度条 ---------- */
.skip-link{
  position:absolute;left:50%;top:-4rem;transform:translateX(-50%);
  z-index:200;padding:.6rem 1.1rem;border-radius:var(--radius-pill);
  background:var(--indigo);color:var(--porcelain);
  font-size:.85rem;text-decoration:none;transition:top var(--dur) ease;
}
.skip-link:focus{top:.6rem;color:var(--porcelain)}

.scroll-progress{
  position:fixed;inset:0 0 auto 0;height:3px;z-index:150;
  background:linear-gradient(90deg,var(--orange),var(--copper));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 6. header ---------- */
.site-header{position:relative;z-index:80;background:var(--porcelain);border-bottom:1px solid var(--line)}

/* 6.1 顶部细条带 */
.masthead-strip{background:var(--indigo);color:rgba(251,248,242,.86)}
.masthead-strip__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.4rem 1rem;padding-block:.5rem;font-size:.72rem;letter-spacing:.1em;
}
.masthead-strip__mark{display:inline-flex;align-items:center;color:var(--porcelain);font-weight:600}
.masthead-strip__mark::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:var(--orange);margin-right:.55rem;flex:none;
}
.masthead-strip__meta{font-family:var(--font-mono);font-size:.68rem;color:rgba(251,248,242,.62)}

/* 6.2 报头 */
.masthead{position:relative;overflow:hidden;background:var(--paper);border-bottom:1px solid var(--line)}
.masthead::before{
  content:"";position:absolute;right:-12rem;top:-24rem;width:36rem;height:36rem;border-radius:50%;
  background:radial-gradient(circle at 32% 72%, rgba(232,117,59,.24), rgba(232,117,59,0) 68%);
  pointer-events:none;
}
.masthead::after{
  content:"";position:absolute;left:-10rem;bottom:-18rem;width:26rem;height:26rem;border-radius:50%;
  background:radial-gradient(circle at 60% 30%, rgba(27,42,74,.18), rgba(27,42,74,0) 70%);
  pointer-events:none;
}
.masthead__inner{
  position:relative;z-index:1;
  display:grid;justify-items:center;text-align:center;gap:.35rem;
  padding-block:clamp(1.3rem,3vw,2.2rem) clamp(1rem,2.4vw,1.5rem);
}
.masthead__kicker{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.26em;
  text-transform:uppercase;color:var(--copper);
}
.masthead__brand{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2.1rem,6vw,3.8rem);line-height:1.06;letter-spacing:.16em;
  color:var(--indigo);text-decoration:none;transition:color var(--dur) ease;
}
.masthead__brand:hover{color:var(--orange)}
.masthead__sub{font-size:.82rem;color:var(--celadon);letter-spacing:.06em;max-width:32ch}

/* 6.3 导航条 */
.nav-bar{background:var(--porcelain);border-bottom:1px solid var(--line)}
.nav-bar__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;
  padding-block:.65rem;
}

.nav-toggle{
  order:1;display:inline-flex;align-items:center;gap:.5rem;
  padding:.45rem .9rem;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--paper);color:var(--indigo);
  font-size:.85rem;font-weight:600;cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange-dark)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px;height:12px}
.nav-toggle__bars span{display:block;height:2px;width:100%;border-radius:2px;background:currentColor;transition:transform var(--dur) ease}
.nav-toggle[aria-expanded="true"]{background:var(--indigo);border-color:var(--indigo);color:var(--porcelain)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle__label{letter-spacing:.06em}

.site-nav{order:3;flex:1 0 100%;display:none;padding-top:.55rem;margin-top:.35rem;border-top:1px solid var(--line)}
.site-header[data-open] .site-nav{display:block}
.site-nav__list{display:flex;flex-direction:column;gap:.15rem}
.site-nav__link{
  display:block;padding:.6rem .75rem;border-radius:14px;
  text-decoration:none;font-size:1rem;font-weight:500;color:var(--indigo);
  transition:background-color var(--dur) ease,color var(--dur) ease,box-shadow var(--dur) ease;
}
.site-nav__link:hover{background:var(--paper);color:var(--orange-dark)}
.site-nav__link[aria-current="page"]{
  background:var(--orange-soft);color:var(--ink);
  box-shadow:inset 0 0 0 1px rgba(232,117,59,.5);
}

.header-cta{
  order:2;margin-left:auto;display:inline-flex;align-items:center;
  padding:.5rem 1rem;border-radius:var(--radius-pill);
  background:var(--orange);color:var(--ink);
  font-size:.85rem;font-weight:600;text-decoration:none;white-space:nowrap;
  transition:background-color var(--dur) ease,transform var(--dur) ease;
}
.header-cta:hover{background:var(--orange-dark);color:var(--porcelain);transform:translateY(-2px)}

/* 6.4 速查抽屉 */
.quick-panel{display:none;background:var(--indigo);color:var(--porcelain);border-top:1px solid rgba(251,248,242,.14)}
.site-header[data-open] .quick-panel{display:block}
.quick-panel__inner{
  display:grid;gap:.75rem;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  padding-block:1.1rem 1.35rem;
}
.quick-card{
  display:grid;gap:.15rem;padding:.85rem 1rem;
  border-radius:var(--radius-md);text-decoration:none;color:inherit;
  background:rgba(251,248,242,.06);
  border:1px solid rgba(251,248,242,.16);
  transition:background-color var(--dur) ease,border-color var(--dur) ease,transform var(--dur) ease;
}
.quick-card:hover{background:rgba(232,117,59,.2);border-color:var(--orange);transform:translateY(-4px)}
.quick-card__tag{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;color:var(--orange-soft)}
.quick-card__title{font-weight:600;font-size:1rem;color:var(--porcelain)}
.quick-card__note{font-size:.78rem;color:rgba(251,248,242,.66)}

/* 6.5 桌面导航 */
@media (min-width:900px){
  .nav-bar__inner{
    display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
    align-items:center;gap:1rem;padding-block:.7rem;
  }
  .nav-toggle{order:0;justify-self:start}
  .site-nav{
    order:0;display:flex;flex:initial;justify-self:center;
    padding-top:0;margin-top:0;border-top:0;
  }
  .site-nav__list{flex-direction:row;flex-wrap:wrap;justify-content:center;gap:.2rem}
  .site-nav__link{padding:.45rem .8rem;font-size:.92rem}
  .site-nav__link[aria-current="page"]{
    background:transparent;color:var(--orange-dark);
    box-shadow:inset 0 -2px 0 var(--orange);
  }
  .header-cta{order:0;margin-left:0;justify-self:end}
}

/* ---------- 7. footer ---------- */
.site-footer{position:relative;background:var(--indigo-deep);color:rgba(251,248,242,.86);margin-top:clamp(2rem,5vw,4rem)}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--orange),var(--copper),var(--teal));
}

.footer-top{display:grid;gap:clamp(1.75rem,4vw,3rem);padding-block:clamp(2rem,5vw,3.5rem)}

.footer-brand__name{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(1.6rem,3vw,2.2rem);letter-spacing:.16em;color:var(--porcelain);
}
.footer-brand__line{margin-top:.6rem;max-width:34ch;font-size:.92rem;color:rgba(251,248,242,.72)}

.footer-contact{margin-top:1.4rem;display:grid;gap:.55rem}
.footer-contact__row{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem .75rem;font-size:.86rem}
.footer-contact__label{
  min-width:4.75rem;font-family:var(--font-mono);font-size:.7rem;
  letter-spacing:.16em;color:var(--orange-soft);
}
.footer-contact__value{color:rgba(251,248,242,.88)}

.copy-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.3rem .8rem;border-radius:var(--radius-pill);
  border:1px solid rgba(251,248,242,.34);background:transparent;
  color:var(--porcelain);font-family:var(--font-mono);font-size:.78rem;
  cursor:pointer;transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.copy-btn:hover{border-color:var(--orange);color:var(--orange-soft)}
.copy-btn[data-copied]{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.copy-btn__text{white-space:nowrap}

.footer-note{margin-top:1.1rem;max-width:38ch;font-size:.78rem;color:rgba(251,248,242,.58)}

.footer-nav{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.footer-nav__title{
  margin-bottom:.7rem;font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.18em;color:var(--copper);font-weight:500;
}
.footer-nav__list{display:grid;gap:.45rem}
.footer-link{
  font-size:.92rem;color:rgba(251,248,242,.84);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) ease,border-color var(--dur) ease;
}
.footer-link:hover{color:var(--porcelain);border-bottom-color:var(--orange)}

.footer-bottom{background:rgba(0,0,0,.22);border-top:1px solid rgba(251,248,242,.16)}
.footer-bottom__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.7rem 1.5rem;padding-block:1rem;font-size:.78rem;
}
.footer-legal{color:rgba(251,248,242,.8)}
.footer-meta{font-family:var(--font-mono);font-size:.74rem;color:rgba(251,248,242,.55)}

.to-top{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.4rem .95rem;border-radius:var(--radius-pill);
  border:1px solid rgba(232,117,59,.7);background:transparent;
  color:var(--orange-soft);font-size:.78rem;font-weight:600;cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,transform var(--dur) ease;
}
.to-top:hover{background:var(--orange);border-color:var(--orange);color:var(--ink);transform:translateY(-2px)}

.copy-status{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0;
}

@media (min-width:820px){
  .footer-top{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}
}

/* ---------- 8. 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.7rem 1.35rem;border-radius:var(--radius-pill);
  border:1px solid transparent;background:var(--porcelain);color:var(--indigo);
  font-size:.92rem;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,transform var(--dur) ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:var(--ink)}
.btn--primary:hover{background:var(--orange-dark);color:var(--porcelain)}
.btn--ink{background:var(--indigo);color:var(--porcelain)}
.btn--ink:hover{background:var(--indigo-deep);color:var(--porcelain)}
.btn--ghost{background:transparent;border-color:var(--indigo);color:var(--indigo)}
.btn--ghost:hover{background:var(--indigo);color:var(--porcelain)}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .65rem;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--porcelain);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--indigo);
}
.tag--orange{background:var(--orange-soft);border-color:transparent;color:var(--ink)}
.tag--celadon{background:rgba(108,122,134,.14);border-color:transparent;color:var(--teal)}

.eyebrow{
  display:inline-block;font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.22em;text-transform:uppercase;color:var(--copper);
}
.index-num{
  display:block;font-family:var(--font-mono);font-weight:600;
  font-size:clamp(2rem,5vw,3.4rem);line-height:1;letter-spacing:-.03em;color:var(--copper);
}

.card{
  background:var(--porcelain);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:clamp(1rem,2.5vw,1.6rem);
  box-shadow:var(--shadow-soft);
}
.card--lift{transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease}
.card--lift:hover{transform:translateY(-4px);border-color:var(--line-copper);box-shadow:0 26px 52px -32px rgba(20,24,31,.7)}

.breadcrumbs{font-family:var(--font-mono);font-size:.76rem;color:var(--celadon)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.breadcrumbs li{display:inline-flex;align-items:center;gap:.4rem}
.breadcrumbs li + li::before{content:"/";color:var(--line);margin-right:.1rem}
.breadcrumbs a{color:var(--indigo);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumbs a:hover{border-bottom-color:var(--orange)}
.breadcrumbs [aria-current="page"]{color:var(--ink)}

/* ---------- 9. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);border:1px solid var(--line);
  background:linear-gradient(160deg,var(--paper),var(--porcelain));
  box-shadow:var(--shadow-soft);
}
.media-frame__img{
  display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;
  transition:transform 420ms ease;
}
.media-frame:hover .media-frame__img{transform:scale(1.02)}
.media-frame--wide .media-frame__img{aspect-ratio:21/9}
.media-frame--tall .media-frame__img{aspect-ratio:3/4}
.media-frame--square .media-frame__img{aspect-ratio:1/1}
.media-frame__note{
  position:absolute;left:1rem;bottom:1rem;
  padding:.3rem .75rem;border-radius:var(--radius-pill);
  background:rgba(27,42,74,.86);color:var(--porcelain);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
}

/* ---------- 10. 滚动显现 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 300ms ease,transform 300ms ease}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 减少动态偏好 ---------- */
@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 [data-reveal]{opacity:1;transform:none}
  .quick-card:hover,.card--lift:hover,.btn:hover,.header-cta:hover,.to-top:hover{transform:none}
  .media-frame:hover .media-frame__img{transform:none}
}

/* ---------- 12. 打印 ---------- */
@media print{
  body{background:#fff;background-image:none;color:#000}
  .site-header,.quick-panel,.scroll-progress,.to-top,.skip-link{display:none !important}
  .site-footer{background:#fff;color:#000;border-top:1px solid #999}
  .site-footer::before{display:none}
  .footer-link,.footer-meta,.footer-legal,.footer-brand__line{color:#000}
  a{text-decoration:underline}
}