/* =========================================================
   永盈会电子 · 共享 Site Kit  /assets/site.css
   高原深青蓝轨道 + 暖铜金索引 + 驾驶舱式连续画布
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-900:#0A1F2B;
  --ink-700:#123444;
  --teal-600:#14566B;
  --cyan-400:#2FB6C4;
  --copper-500:#C98A34;
  --gold-200:#F0D9AE;
  --camellia-600:#C2453F;
  --mist-100:#E9EFF1;
  --paper-50:#F7F4EE;
  --ink-text:#08151A;
  --slate-500:#5A6B73;

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

  --rail-w:268px;
  --maxw:1180px;
  --hard:6px 6px 0 rgba(8,21,26,.16);
  --hard-sm:4px 4px 0 rgba(8,21,26,.28);
}

/* ---------- 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,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}
:focus-visible{outline:3px solid var(--cyan-400);outline-offset:2px}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-text);
  background:var(--paper-50);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.18;letter-spacing:-.015em;color:var(--ink-900)}
h1{font-size:clamp(2.2rem,5.2vw,4rem)}
h2{font-size:clamp(1.6rem,3vw,2.35rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.5rem);font-weight:900;letter-spacing:0}
h4{font-size:1.05rem;font-weight:700}
p{text-wrap:pretty}
.mono{font-family:var(--font-mono);letter-spacing:.06em;font-variant-numeric:tabular-nums}
.num{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums}
.unit{font-family:var(--font-mono);font-size:.72em;color:var(--slate-500);margin-left:.18em;letter-spacing:.04em}
.lead{font-size:clamp(1.05rem,1.5vw,1.22rem);line-height:1.78;color:var(--teal-600)}
.prose{max-width:34em;line-height:1.95}
.prose p+p{margin-top:1.05rem}
.label{
  display:inline-flex;align-items:center;gap:.4rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;line-height:1.5;
  padding:.28rem .6rem;background:var(--gold-200);color:var(--ink-900);
  border:1px solid rgba(8,21,26,.35);text-transform:uppercase;
  min-height:26px;
}
.label--dark{background:rgba(47,182,196,.16);color:var(--cyan-400);border-color:rgba(47,182,196,.5)}

/* ---------- 4. 布局容器 ---------- */
.container{width:min(100% - 2.5rem,var(--maxw));margin-inline:auto}
.section{padding-block:clamp(2.5rem,5vw,4.5rem);position:relative}
.section--paper{background:var(--paper-50)}
.section--mist{background:var(--mist-100)}
.section--dark{background:var(--ink-900);color:var(--mist-100)}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:var(--mist-100)}
.section--dark .lead{color:var(--cyan-400)}
.section--dark .prose{color:rgba(233,239,241,.88)}

.grid{display:grid;gap:clamp(1rem,2vw,1.6rem)}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}
.grid--split{grid-template-columns:1fr}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,1fr)}
  .grid--split{grid-template-columns:5fr 4fr}
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:46px;padding:.7rem 1.3rem;
  font-size:.95rem;font-weight:700;letter-spacing:.04em;line-height:1.4;
  border:2px solid var(--ink-900);background:var(--paper-50);color:var(--ink-900);
  box-shadow:var(--hard-sm);
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(8,21,26,.42)}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(8,21,26,.35)}
.btn--primary{background:var(--copper-500);color:var(--ink-900);border-color:var(--ink-900)}
.btn--primary:hover{background:var(--gold-200);border-color:var(--copper-500)}
.btn--ghost{background:transparent;color:var(--gold-200);border-color:var(--gold-200);box-shadow:4px 4px 0 rgba(0,0,0,.45)}
.btn--ghost:hover{background:rgba(201,138,52,.2);border-color:var(--copper-500);color:var(--gold-200);box-shadow:6px 6px 0 rgba(0,0,0,.5)}
.btn--block{display:flex;width:100%}

/* ---------- 6. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:.5rem;top:-4rem;z-index:200;
  padding:.7rem 1rem;background:var(--copper-500);color:var(--ink-900);
  font-weight:700;border:2px solid var(--ink-900);
  transition:top .18s ease;
}
.skip-link:focus{top:.5rem}

/* ---------- 7. 页头：侧边轨道 ---------- */
.site-header{
  position:sticky;top:0;left:0;right:0;z-index:70;
  background:var(--ink-900);color:var(--mist-100);
  border-bottom:3px solid var(--teal-600);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.42;
  background-image:
    linear-gradient(rgba(47,182,196,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,182,196,.10) 1px,transparent 1px);
  background-size:32px 32px;
}
.site-header::after{
  content:"";position:absolute;right:-70px;bottom:-90px;width:220px;height:220px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(47,182,196,.4),transparent 70%);
}
.site-header__inner{position:relative;z-index:2;padding:.7rem 1rem 0}
.site-header__top{display:flex;align-items:center;justify-content:space-between;gap:1rem}

.brand{display:flex;align-items:center;gap:.7rem;min-height:44px}
.brand__mark{
  width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;
  background:var(--copper-500);color:var(--ink-900);
  font-family:var(--font-display);font-weight:900;font-size:1.3rem;line-height:1;
  border:2px solid var(--gold-200);box-shadow:4px 4px 0 rgba(0,0,0,.4);
}
.brand__text{display:flex;flex-direction:column;gap:.1rem}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:1.08rem;letter-spacing:.03em;color:var(--mist-100)}
.brand__line{display:none;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;color:var(--cyan-400)}

.nav-toggle{
  display:inline-flex;align-items:center;gap:.55rem;
  min-width:44px;min-height:44px;padding:.5rem .7rem;
  background:rgba(47,182,196,.12);border:2px solid var(--cyan-400);color:var(--gold-200);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.nav-toggle__bar{display:block;width:16px;height:2px;background:currentColor;box-shadow:0 6px 0 currentColor}
.nav-toggle[aria-expanded="true"]{background:var(--copper-500);color:var(--ink-900);border-color:var(--gold-200)}

/* 抽屉（移动） */
.site-nav{
  position:fixed;inset:0 auto 0 0;z-index:55;
  width:min(88vw,360px);max-height:100vh;overflow-y:auto;
  display:flex;flex-direction:column;gap:1.4rem;
  padding:5.4rem 1.15rem 1.75rem;
  background:linear-gradient(180deg,var(--ink-900) 0%,var(--ink-700) 100%);
  border-right:3px solid var(--teal-600);
  box-shadow:14px 0 0 rgba(8,21,26,.18);
  transform:translateX(-104%);
  transition:transform .3s cubic-bezier(.22,.75,.28,1);
}
.site-nav[data-open="true"]{transform:translateX(0)}
html.is-nav-open{overflow:hidden}

.site-nav__list{display:flex;flex-direction:column;gap:2px;counter-reset:navi}
.site-nav__link{
  display:flex;align-items:center;gap:.7rem;
  min-height:44px;padding:.55rem .75rem;
  border-left:3px solid transparent;
  color:var(--mist-100);font-size:1rem;letter-spacing:.02em;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.site-nav__link::before{
  counter-increment:navi;content:counter(navi,decimal-leading-zero);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  color:rgba(240,217,174,.6);flex:0 0 auto;
}
.site-nav__link:hover{background:rgba(47,182,196,.14);transform:translateX(3px);color:var(--gold-200)}
.site-nav__link[aria-current="page"]{
  border-left-color:var(--cyan-400);
  background:linear-gradient(90deg,rgba(47,182,196,.26),rgba(47,182,196,0) 88%);
  color:var(--gold-200);font-weight:700;
}
.site-nav__link[aria-current="page"]::before{color:var(--copper-500)}
.site-nav__link[aria-current="page"]::after{
  content:"";width:7px;height:7px;margin-left:auto;border-radius:50%;
  background:var(--camellia-600);box-shadow:0 0 0 3px rgba(194,69,63,.22);
}

/* 服务动线索引 */
.route-index{padding-top:1rem;border-top:1px solid rgba(47,182,196,.28)}
.route-index__title{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan-400);margin-bottom:.6rem;
}
.route-index__list{display:flex;flex-direction:column;gap:8px}
.route-index__link{
  display:grid;grid-template-columns:34px 26px 1fr;align-items:center;gap:.5rem;
  min-height:44px;padding:.45rem .6rem;
  background:rgba(233,239,241,.05);border:1px solid rgba(47,182,196,.22);
  transition:border-color .2s ease,background-color .2s ease,transform .2s ease;
}
.route-index__link:hover{background:rgba(47,182,196,.16);border-color:var(--copper-500);transform:translateX(3px)}
.route-index__num{font-family:var(--font-mono);font-weight:700;font-size:.8rem;letter-spacing:.06em;color:var(--copper-500)}
.route-index__key{font-weight:900;font-size:1rem;color:var(--gold-200)}
.route-index__note{font-size:.8rem;color:rgba(233,239,241,.72);letter-spacing:.02em}

.site-nav__foot{margin-top:auto;padding-top:1rem;border-top:1px solid rgba(47,182,196,.28);display:flex;flex-direction:column;gap:.6rem}
.site-nav__note{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:rgba(233,239,241,.6);text-align:center}

/* 遮罩 */
.nav-scrim{
  position:fixed;inset:0;z-index:50;display:none;
  background:rgba(8,21,26,.62);opacity:0;pointer-events:none;
  transition:opacity .25s ease;
}
.nav-scrim[data-open="true"]{opacity:1;pointer-events:auto}

/* 滚动进度 */
.scroll-progress{position:absolute;background:rgba(233,239,241,.16);pointer-events:none;z-index:6}
.scroll-progress__bar{display:block;background:linear-gradient(90deg,var(--cyan-400),var(--copper-500));transition:width .1s linear,height .1s linear}

/* 桌面：固定轨道 */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-header{
    position:fixed;inset:0 auto 0 0;width:var(--rail-w);
    display:flex;flex-direction:column;overflow:hidden;
    border-bottom:0;border-right:3px solid var(--teal-600);
  }
  .site-header__inner{
    display:flex;flex-direction:column;gap:1.35rem;
    height:100%;padding:1.6rem 1.25rem 1.5rem;
  }
  .site-header__top{display:block}
  .brand{align-items:flex-start;min-height:0}
  .brand__line{display:block}
  .nav-toggle{display:none}
  .site-nav{
    position:static;width:auto;max-height:none;overflow-y:auto;
    padding:0;background:none;border-right:0;box-shadow:none;
    transform:none;flex:1;gap:1.3rem;
  }
  .nav-scrim{display:none}
  /* 轨道右缘竖向进度 */
  .scroll-progress{top:0;right:0;width:3px;height:100%}
  .scroll-progress__bar{width:100%;height:0}
}
@media (max-width:1023px){
  .site-header__inner{padding:.7rem 1rem .8rem}
  .site-nav[data-open="false"]{pointer-events:none}
  .nav-scrim{display:block}
  .scroll-progress{left:0;right:0;bottom:-3px;height:3px}
  .scroll-progress__bar{width:0;height:100%}
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:var(--mist-100);
  border-top:4px solid var(--teal-600);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.32;
  background-image:
    linear-gradient(rgba(47,182,196,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,182,196,.12) 1px,transparent 1px);
  background-size:44px 44px;
}
.site-footer__inner{
  position:relative;z-index:2;
  width:min(100% - 2.5rem,var(--maxw));margin-inline:auto;
  padding-block:clamp(2.4rem,4vw,3.4rem) 1.4rem;
}
.site-footer__grid{display:grid;grid-template-columns:1fr;gap:2rem}
@media (min-width:720px){
  .site-footer__grid{grid-template-columns:1.5fr 1fr 1fr}
}
@media (min-width:1024px){
  .site-footer__grid{grid-template-columns:1.6fr 1fr 1fr 1.35fr;gap:2.4rem}
}
.site-footer__brand{display:flex;flex-direction:column;gap:.75rem;align-items:flex-start}
.site-footer__wordmark{
  font-family:var(--font-display);font-weight:900;font-size:1.6rem;letter-spacing:.02em;
  color:var(--gold-200);line-height:1.2;padding-bottom:.5rem;
  border-bottom:3px solid var(--copper-500);
}
.site-footer__line{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;color:var(--cyan-400)}
.site-footer__summary{font-size:.95rem;line-height:1.85;color:rgba(233,239,241,.82);max-width:32em}
.site-footer__col{display:flex;flex-direction:column;gap:.6rem}
.site-footer__title{
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan-400);margin:0;
}
.site-footer__list{display:flex;flex-direction:column;gap:.15rem}
.site-footer__link{
  display:inline-flex;align-items:center;min-height:40px;
  color:var(--mist-100);font-size:.95rem;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.site-footer__link::before{
  content:"";width:8px;height:2px;background:var(--copper-500);margin-right:.55rem;flex:0 0 auto;
}
.site-footer__link:hover{color:var(--gold-200);border-bottom-color:var(--copper-500);transform:translateX(2px)}
.site-footer__col--contact{gap:.7rem;align-items:flex-start}
.site-footer__contact{font-size:.9rem;line-height:1.75;color:rgba(233,239,241,.82)}
.site-footer__contact .mono{font-size:.86rem;color:var(--gold-200)}
.site-footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.6rem 1.5rem;
  margin-top:2.2rem;padding-top:1.1rem;
  border-top:1px solid rgba(47,182,196,.28);
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;color:rgba(233,239,241,.66);
}
.site-footer__legal{display:inline-flex;align-items:center;gap:.5rem}
.site-footer__legal::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--camellia-600);
  box-shadow:0 0 0 3px rgba(194,69,63,.2);
}
.site-footer__meta{color:rgba(233,239,241,.6)}

/* ---------- 9. 通用组件 ---------- */
.breadcrumb{margin-block:1.1rem}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;gap:.35rem .55rem;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;color:var(--slate-500);
}
.breadcrumb__item{display:flex;align-items:center;gap:.55rem}
.breadcrumb__item+.breadcrumb__item::before{content:"/";color:var(--cyan-400)}
.breadcrumb__link{color:var(--teal-600);border-bottom:1px solid rgba(20,86,107,.35)}
.breadcrumb__link:hover{color:var(--copper-500);border-bottom-color:var(--copper-500)}

.card{
  display:flex;flex-direction:column;gap:.6rem;
  padding:1.25rem;background:#fff;border:2px solid var(--ink-900);
  box-shadow:var(--hard);
}
.card--dark{background:var(--ink-700);border-color:var(--teal-600);color:var(--mist-100);box-shadow:6px 6px 0 rgba(0,0,0,.35)}
.card__title{font-family:var(--font-display);font-weight:900;font-size:1.15rem;line-height:1.3}
.card--dark .card__title{color:var(--mist-100)}
.card__meta{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;color:var(--slate-500)}
.card--dark .card__meta{color:var(--cyan-400)}

.media{
  position:relative;overflow:hidden;
  border:2px solid var(--ink-900);box-shadow:8px 8px 0 rgba(8,21,26,.16);
  background:linear-gradient(135deg,var(--ink-700),var(--teal-600));
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(47,182,196,.18) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,182,196,.18) 1px,transparent 1px);
  background-size:48px 48px;
}
.media__img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--land{aspect-ratio:16/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}

.tabs{border:2px solid var(--ink-900);background:#fff}
.tabs__list{display:flex;flex-wrap:wrap;background:var(--mist-100);border-bottom:2px solid var(--ink-900)}
.tabs__tab{
  min-height:46px;padding:.6rem 1.1rem;
  font-size:.95rem;font-weight:700;letter-spacing:.02em;
  border-right:1px solid rgba(8,21,26,.16);
  color:var(--ink-900);
  transition:background-color .18s ease,color .18s ease;
}
.tabs__tab:not([aria-selected="true"]):hover{background:var(--gold-200)}
.tabs__tab[aria-selected="true"]{
  background:var(--ink-900);color:var(--gold-200);
  box-shadow:inset 0 -4px 0 var(--cyan-400);
}
.tabs__panel{padding:1.25rem}
.tabs__panel[hidden]{display:none}

.accordion{border-top:2px solid var(--ink-900)}
.accordion__item{border-bottom:1px solid rgba(8,21,26,.22)}
.accordion__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  width:100%;min-height:56px;padding:1rem .25rem;text-align:left;
  font-weight:700;font-size:1.02rem;color:var(--ink-900);
}
.accordion__trigger::after{
  content:"+";font-family:var(--font-mono);font-size:1.25rem;color:var(--copper-500);line-height:1;
}
.accordion__trigger[aria-expanded="true"]::after{content:"–";color:var(--cyan-400)}
.accordion__panel{padding:0 .25rem 1.15rem;max-width:44em;color:var(--slate-500)}
.accordion__panel[hidden]{display:none}

.reveal{transition:opacity .28s linear,transform .3s cubic-bezier(.2,.7,.3,1)}
.reveal.is-reveal-ready:not(.is-visible){opacity:0;transform:translateY(14px)}

/* ---------- 10. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal,.reveal.is-reveal-ready:not(.is-visible){opacity:1 !important;transform:none !important}
  .btn:hover{transform:none}
  .site-nav__link:hover,.route-index__link:hover,.site-footer__link:hover{transform:none}
}