/* ============================================================
   优盈服务 · 共享站点样式 /assets/site.css
   高原路标体系：湖蓝 + 盐白 冷净底色，赭红/明黄 行动点
   ============================================================ */

/* ---------- 01 · 变量 ---------- */
:root{
  --yy-lake:#0E6C8C;
  --yy-lake-deep:#083F52;
  --yy-lake-ink:#052B39;
  --yy-salt:#F7F4EC;
  --yy-cream:#EFE6D6;
  --yy-ochre:#B4452E;
  --yy-gold:#F0B429;
  --yy-rock:#4A5359;
  --yy-moss:#5B6E52;
  --yy-clay:#C98A6B;
  --yy-glass:#CFE2E8;

  --yy-rail-h:36px;
  --yy-top-h:78px;
  --yy-head-h:calc(var(--yy-rail-h) + var(--yy-top-h));

  --yy-maxw:1280px;
  --yy-gutter:clamp(18px,4.5vw,54px);
  --yy-radius:3px;

  --yy-line:rgba(74,83,89,.20);
  --yy-line-strong:rgba(8,63,82,.26);
  --yy-cream-ink:#3D464B;

  --yy-font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --yy-font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --yy-font-annot:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --yy-font-num:"DIN Condensed","Oswald","Arial Narrow","Helvetica Neue",Arial,sans-serif;

  --yy-ease:cubic-bezier(.22,.61,.36,1);
  --yy-shadow-soft:0 22px 48px -34px rgba(8,63,82,.7);
}

/* ---------- 02 · 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--yy-head-h) + 18px);
}
body{
  margin:0;
  background:var(--yy-salt);
  color:var(--yy-rock);
  font-family:var(--yy-font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.yy-nav-open{overflow:hidden}
h1,h2,h3,h4,h5,h6{
  margin:0 0 .5em;
  font-family:var(--yy-font-display);
  font-weight:900;
  line-height:1.1;
  letter-spacing:.04em;
  color:var(--yy-lake-deep);
}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit}
a{color:var(--yy-lake);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--yy-ochre)}
strong{font-weight:700;color:var(--yy-lake-deep)}
:focus-visible{outline:2px solid var(--yy-ochre);outline-offset:3px;border-radius:2px}
.yy-sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- 03 · 主内容与首屏框景 ---------- */
#main-content{padding-top:var(--yy-head-h)}
.yy-hero{
  position:relative;
  margin-top:calc(var(--yy-head-h) * -1);
  padding-top:calc(var(--yy-head-h) + clamp(36px,7vw,88px));
  padding-bottom:clamp(40px,7vw,96px);
}

/* ---------- 04 · 跳过链接 ---------- */
.yy-skip{
  position:fixed;
  top:-90px;left:18px;
  z-index:200;
  padding:11px 20px;
  background:var(--yy-lake-deep);
  color:var(--yy-salt);
  font-size:14px;
  letter-spacing:.08em;
  text-decoration:none;
  border-left:3px solid var(--yy-gold);
  border-radius:0 0 2px 2px;
  transition:top .25s var(--yy-ease);
}
.yy-skip:focus,
.yy-skip:focus-visible{top:0;color:var(--yy-salt)}

/* ---------- 05 · 头部 ---------- */
.yy-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  color:var(--yy-lake-deep);
  background:rgba(207,226,232,.55);
  -webkit-backdrop-filter:blur(16px) saturate(1.15);
  backdrop-filter:blur(16px) saturate(1.15);
  border-bottom:1px solid rgba(8,63,82,.14);
  transition:background .35s var(--yy-ease),box-shadow .35s var(--yy-ease),border-color .35s var(--yy-ease);
}
.yy-header[data-scrolled="true"]{
  background:rgba(247,244,236,.97);
  border-bottom-color:var(--yy-line-strong);
  box-shadow:0 14px 34px -30px rgba(8,63,82,.95);
}
.yy-header[data-open="true"]{
  background:rgba(247,244,236,.99);
  border-bottom-color:var(--yy-line-strong);
}

/* 顶部目录带 */
.yy-rail{background:var(--yy-lake-deep);color:rgba(247,244,236,.82)}
.yy-rail__inner{
  max-width:var(--yy-maxw);
  margin:0 auto;
  padding:0 var(--yy-gutter);
  height:var(--yy-rail-h);
  display:flex;
  align-items:center;
  gap:12px;
  font-size:12.5px;
  letter-spacing:.06em;
}
.yy-rail__dot{
  flex:none;
  width:6px;height:6px;border-radius:50%;
  background:var(--yy-gold);
  box-shadow:0 0 0 3px rgba(240,180,41,.22);
}
.yy-rail__note{
  margin:0;
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.yy-rail__meta{
  margin-left:auto;
  flex:none;
  font-family:var(--yy-font-num);
  letter-spacing:.12em;
  color:rgba(247,244,236,.68);
  white-space:nowrap;
}

/* 主行 */
.yy-top__inner{
  max-width:var(--yy-maxw);
  margin:0 auto;
  padding:0 var(--yy-gutter);
  height:var(--yy-top-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,36px);
}

/* 品牌 */
.yy-brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
  text-decoration:none;
  color:inherit;
}
.yy-brand__mark{
  position:relative;
  width:42px;height:42px;
  display:grid;place-items:center;
  background:var(--yy-ochre);
  color:var(--yy-salt);
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:21px;
  letter-spacing:.02em;
  border-radius:2px;
  box-shadow:inset 0 0 0 1px rgba(247,244,236,.3);
}
.yy-brand__mark::after{
  content:"";
  position:absolute;
  right:-3px;bottom:-3px;
  width:8px;height:8px;
  background:var(--yy-gold);
  opacity:.9;
}
.yy-brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.18}
.yy-brand__name{
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:.16em;
  color:var(--yy-lake-deep);
}
.yy-brand__tag{
  font-family:var(--yy-font-annot);
  font-size:11px;
  letter-spacing:.14em;
  color:rgba(8,63,82,.62);
}

/* 菜单容器：桌面为行内，移动为面板 */
.yy-menu{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,28px);
}

/* 导航 */
.yy-nav{min-width:0}
.yy-nav__list{
  counter-reset:yy-nav;
  display:flex;
  align-items:center;
  gap:clamp(4px,1.3vw,18px);
  margin:0;padding:0;
  list-style:none;
}
.yy-nav__item{display:flex}
.yy-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:10px 3px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.06em;
  color:rgba(8,63,82,.86);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--yy-ease);
}
.yy-nav__link::before{
  counter-increment:yy-nav;
  content:counter(yy-nav,decimal-leading-zero);
  font-family:var(--yy-font-num);
  font-size:10px;
  letter-spacing:.08em;
  color:rgba(14,108,140,.52);
  transform:translateY(-.42em);
}
.yy-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:3px;
  height:2px;
  background:var(--yy-gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--yy-ease);
}
.yy-nav__link:hover,.yy-nav__link:focus-visible{color:var(--yy-lake)}
.yy-nav__link:hover::after,
.yy-nav__link:focus-visible::after{transform:scaleX(1)}
.yy-nav__link[aria-current="page"]{color:var(--yy-lake);font-weight:700}
.yy-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.yy-nav__link[aria-current="page"]::before{color:var(--yy-ochre)}

/* 行动按钮 */
.yy-actions{display:flex;align-items:center;gap:10px;flex:none}
.yy-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-family:var(--yy-font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.2;
  text-decoration:none;
  white-space:nowrap;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background .22s var(--yy-ease),color .22s var(--yy-ease),border-color .22s var(--yy-ease),transform .22s var(--yy-ease);
}
.yy-btn--primary{
  background:var(--yy-ochre);
  color:#fff;
  box-shadow:0 12px 24px -18px rgba(180,69,46,.95);
}
.yy-btn--primary:hover,.yy-btn--primary:focus-visible{
  background:#9C3A25;
  color:#fff;
  transform:translateY(-1px);
}
.yy-btn--ghost{
  background:transparent;
  color:var(--yy-lake-deep);
  border-color:rgba(8,63,82,.3);
}
.yy-btn--ghost:hover,.yy-btn--ghost:focus-visible{
  background:rgba(207,226,232,.55);
  border-color:var(--yy-lake);
  color:var(--yy-lake);
}

/* 移动菜单按钮 */
.yy-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 12px;
  background:transparent;
  border:1px solid rgba(8,63,82,.3);
  border-radius:2px;
  color:var(--yy-lake-deep);
  cursor:pointer;
}
.yy-toggle__bars{display:grid;gap:4px;width:18px}
.yy-toggle__bar{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .3s var(--yy-ease),opacity .2s var(--yy-ease);
}
.yy-header[data-open="true"] .yy-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.yy-header[data-open="true"] .yy-toggle__bar:nth-child(2){opacity:0}
.yy-header[data-open="true"] .yy-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 阅读进度 */
.yy-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  pointer-events:none;
}
.yy-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--yy-lake) 0%,var(--yy-lake) 45%,var(--yy-gold) 78%,var(--yy-ochre) 100%);
  will-change:transform;
}

/* ---------- 06 · 通用布局 ---------- */
.yy-container{
  width:100%;
  max-width:var(--yy-maxw);
  margin-inline:auto;
  padding-inline:var(--yy-gutter);
}
.yy-narrow{max-width:64ch}
.yy-section{
  padding-block:clamp(48px,7vw,104px);
  position:relative;
}
.yy-section--cream{background:var(--yy-cream)}
.yy-section--deep{background:var(--yy-lake-deep);color:rgba(247,244,236,.86)}
.yy-section--deep h1,.yy-section--deep h2,.yy-section--deep h3{color:var(--yy-salt)}
.yy-grid{display:grid;gap:clamp(20px,3vw,44px)}
.yy-grid--split{grid-template-columns:7fr 5fr}
.yy-grid--even{grid-template-columns:1fr 1fr}
.yy-grid--thirds{grid-template-columns:repeat(3,1fr)}
.yy-hr{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--yy-line-strong) 0%,rgba(8,63,82,.06) 60%,transparent 100%);
}
.yy-ruler{
  height:12px;
  background-image:repeating-linear-gradient(90deg,rgba(8,63,82,.34) 0 1px,transparent 1px 16px);
  background-repeat:repeat-x;
  background-position:0 100%;
  background-size:auto 7px;
  opacity:.85;
}

/* ---------- 07 · 文字组件 ---------- */
.yy-display{
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:clamp(2.3rem,6vw,4.5rem);
  line-height:1.02;
  letter-spacing:.05em;
  color:var(--yy-lake-deep);
}
.yy-title{
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:clamp(1.55rem,3vw,2.45rem);
  line-height:1.14;
  letter-spacing:.04em;
  color:var(--yy-lake-deep);
}
.yy-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--yy-font-annot);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--yy-ochre);
}
.yy-eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:currentColor;
  opacity:.65;
}
.yy-lede{
  font-size:clamp(1.02rem,1.5vw,1.18rem);
  line-height:1.9;
  color:var(--yy-cream-ink);
  max-width:56ch;
}
.yy-note{
  font-family:var(--yy-font-annot);
  font-size:13px;
  line-height:1.8;
  letter-spacing:.08em;
  color:rgba(74,83,89,.88);
}
.yy-annot{
  display:inline-block;
  writing-mode:vertical-rl;
  font-family:var(--yy-font-annot);
  font-size:12.5px;
  letter-spacing:.34em;
  color:rgba(8,63,82,.6);
}
.yy-num{
  font-family:var(--yy-font-num);
  font-weight:700;
  font-size:clamp(2.2rem,4vw,3.6rem);
  line-height:1;
  letter-spacing:.02em;
  color:var(--yy-lake);
}
.yy-quote{
  margin:0;
  padding:6px 0 6px 18px;
  border-left:3px solid var(--yy-ochre);
  font-family:var(--yy-font-annot);
  font-size:16px;
  line-height:1.9;
  color:var(--yy-lake-deep);
}

/* ---------- 08 · 通用小组件 ---------- */
.yy-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--yy-lake);
  text-decoration:none;
  padding-bottom:3px;
  border-bottom:1px solid rgba(14,108,140,.35);
  transition:color .2s var(--yy-ease),border-color .2s var(--yy-ease);
}
.yy-link::after{content:"→";font-family:var(--yy-font-num);transition:transform .25s var(--yy-ease)}
.yy-link:hover{color:var(--yy-ochre);border-color:var(--yy-ochre)}
.yy-link:hover::after{transform:translateX(4px)}
.yy-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-size:12px;
  letter-spacing:.12em;
  color:#fff;
  background:var(--yy-moss);
  border-radius:2px;
}
.yy-tag--sand{background:rgba(240,180,41,.22);color:#6A4B00}
.yy-tag--clay{background:var(--yy-clay);color:#3A2318}
.yy-panel{
  background:rgba(207,226,232,.62);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.55);
  border-radius:var(--yy-radius);
  padding:clamp(18px,2.6vw,32px);
  box-shadow:var(--yy-shadow-soft);
}
.yy-seal{
  display:inline-grid;
  place-items:center;
  width:56px;height:56px;
  border-radius:50%;
  border:1.5px solid var(--yy-ochre);
  background:rgba(180,69,46,.07);
  color:var(--yy-ochre);
  font-family:var(--yy-font-num);
  font-size:22px;
  letter-spacing:.02em;
  line-height:1;
}

/* 面包屑 */
.yy-breadcrumb{padding-block:18px}
.yy-breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;padding:0;
  list-style:none;
  font-family:var(--yy-font-annot);
  font-size:12.5px;
  letter-spacing:.14em;
  color:rgba(74,83,89,.8);
}
.yy-breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.yy-breadcrumb__item + .yy-breadcrumb__item::before{
  content:"/";
  color:rgba(8,63,82,.32);
}
.yy-breadcrumb__link{color:var(--yy-lake);text-decoration:none}
.yy-breadcrumb__link:hover{color:var(--yy-ochre);text-decoration:underline}

/* 图片容器基础规则 */
.yy-media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:var(--yy-cream);
  border-radius:2px;
}
.yy-media::after{
  content:"";
  position:absolute;
  inset:0;
  box-shadow:inset 0 0 0 1px rgba(8,63,82,.16);
  pointer-events:none;
}
.yy-media img,
.yy-media picture,
.yy-media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.yy-media--wide{aspect-ratio:16/9}
.yy-media--band{aspect-ratio:21/9}
.yy-media--tall{aspect-ratio:4/5}
.yy-media--square{aspect-ratio:1/1}
.yy-media__caption{
  position:absolute;
  left:0;bottom:0;
  max-width:100%;
  padding:10px 14px;
  background:rgba(8,63,82,.74);
  color:var(--yy-salt);
  font-family:var(--yy-font-annot);
  font-size:12px;
  letter-spacing:.1em;
  line-height:1.6;
}

/* ---------- 09 · 页脚 ---------- */
.yy-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  padding-top:clamp(44px,6vw,84px);
  background:var(--yy-lake-deep);
  color:rgba(247,244,236,.8);
}
.yy-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:4px;
  background:linear-gradient(90deg,var(--yy-ochre) 0%,var(--yy-gold) 28%,var(--yy-lake) 62%,rgba(207,226,232,.35) 100%);
}
.yy-footer__inner{
  max-width:var(--yy-maxw);
  margin-inline:auto;
  padding-inline:var(--yy-gutter);
}
.yy-footer__top{
  display:grid;
  grid-template-columns:1.25fr .8fr .8fr 1.2fr;
  gap:clamp(24px,3.4vw,56px);
  padding-bottom:clamp(30px,4vw,54px);
}
.yy-footer__brand{min-width:0}
.yy-footer__logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--yy-salt);
}
.yy-footer__mark{
  width:36px;height:36px;
  display:grid;place-items:center;
  background:var(--yy-ochre);
  color:var(--yy-salt);
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:18px;
  border-radius:2px;
}
.yy-footer__name{
  font-family:var(--yy-font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:.16em;
  color:var(--yy-salt);
}
.yy-footer__summary{
  margin:16px 0 0;
  max-width:30ch;
  font-size:14px;
  line-height:1.85;
  color:rgba(207,226,232,.76);
}
.yy-footer__stamp{
  display:inline-block;
  margin:18px 0 0;
  padding:6px 10px;
  border:1px solid rgba(240,180,41,.36);
  font-family:var(--yy-font-annot);
  font-size:11.5px;
  letter-spacing:.26em;
  color:rgba(240,180,41,.88);
}
.yy-footer__cols{display:contents}
.yy-footer__col{min-width:0}
.yy-footer__colTitle{
  margin:0 0 14px;
  font-family:var(--yy-font-annot);
  font-size:12.5px;
  font-weight:400;
  letter-spacing:.28em;
  color:rgba(240,180,41,.9);
}
.yy-footer__links{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.yy-footer__links a{
  position:relative;
  display:inline-block;
  font-size:15px;
  letter-spacing:.05em;
  color:rgba(247,244,236,.82);
  text-decoration:none;
  transition:color .2s var(--yy-ease);
}
.yy-footer__links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-3px;
  height:1px;
  background:var(--yy-gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s var(--yy-ease);
}
.yy-footer__links a:hover,
.yy-footer__links a:focus-visible{color:#fff}
.yy-footer__links a:hover::after,
.yy-footer__links a:focus-visible::after{transform:scaleX(1)}
.yy-footer__contact{min-width:0}
.yy-footer__contactList{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:14px}
.yy-footer__contactList li{
  display:grid;
  grid-template-columns:66px 1fr;
  gap:10px;
  align-items:baseline;
}
.yy-footer__label{
  font-family:var(--yy-font-annot);
  font-size:11.5px;
  letter-spacing:.16em;
  color:rgba(207,226,232,.6);
}
.yy-footer__value{
  color:rgba(247,244,236,.92);
  line-height:1.7;
  overflow-wrap:anywhere;
}
.yy-footer__note{
  margin:18px 0 0;
  padding-left:12px;
  border-left:2px solid rgba(240,180,41,.55);
  font-size:13px;
  line-height:1.75;
  color:rgba(207,226,232,.68);
}
.yy-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 26px;
  padding:18px 0 26px;
  border-top:1px solid rgba(207,226,232,.22);
}
.yy-footer__legalLinks{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin:0;padding:0;
  list-style:none;
  font-size:13px;
  letter-spacing:.06em;
}
.yy-footer__legalLinks a{color:rgba(247,244,236,.72);text-decoration:none}
.yy-footer__legalLinks a:hover,.yy-footer__legalLinks a:focus-visible{color:var(--yy-gold)}
.yy-footer__copy{
  margin:0;
  font-family:var(--yy-font-num);
  font-size:12.5px;
  letter-spacing:.1em;
  color:rgba(207,226,232,.55);
}

/* ---------- 10 · 显现动效 ---------- */
.yy-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--yy-ease),transform .6s var(--yy-ease);
}
.yy-js [data-reveal][data-revealed="true"]{
  opacity:1;
  transform:none;
}

/* ---------- 11 · 响应式 ---------- */
@media (max-width:1100px){
  :root{--yy-rail-h:32px;--yy-top-h:66px}
  .yy-brand__tag{display:none}
  .yy-brand__name{font-size:18px;letter-spacing:.12em}
  .yy-brand__mark{width:38px;height:38px;font-size:19px}
  .yy-toggle{display:inline-flex}
  .yy-menu{
    position:fixed;
    top:var(--yy-head-h);
    left:0;right:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--yy-gutter) 26px;
    max-height:calc(100vh - var(--yy-head-h));
    max-height:calc(100dvh - var(--yy-head-h));
    overflow-y:auto;
    background:var(--yy-salt);
    border-bottom:1px solid var(--yy-line-strong);
    box-shadow:0 26px 44px -32px rgba(8,63,82,.9);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .28s var(--yy-ease),transform .28s var(--yy-ease),visibility .28s linear;
  }
  .yy-header[data-open="true"] .yy-menu{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .yy-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .yy-nav__item{display:block;border-bottom:1px solid var(--yy-line)}
  .yy-nav__link{width:100%;padding:16px 0;font-size:17px}
  .yy-nav__link::after{bottom:10px;right:auto;width:44px}
  .yy-actions{flex-direction:column;align-items:stretch;gap:10px;padding-top:18px}
  .yy-btn{width:100%;padding:13px 18px}
  .yy-rail__meta{display:none}
  .yy-grid--split,.yy-grid--even,.yy-grid--thirds{grid-template-columns:1fr}
  .yy-footer__top{grid-template-columns:1fr 1fr}
  .yy-footer__contact{grid-column:1 / -1}
}
@media (max-width:760px){
  :root{--yy-top-h:62px}
  body{font-size:16.5px}
  .yy-rail__note{font-size:11.5px;letter-spacing:.02em}
  .yy-footer__top{grid-template-columns:1fr;gap:30px}
  .yy-footer__contactList li{grid-template-columns:1fr;gap:2px}
  .yy-footer__legal{flex-direction:column;align-items:flex-start}
  .yy-media--tall{aspect-ratio:3/4}
  .yy-media--band{aspect-ratio:16/9}
}

/* ---------- 12 · 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;
    scroll-behavior:auto !important;
  }
  .yy-js [data-reveal]{opacity:1;transform:none}
  .yy-link:hover::after{transform:none}
}