:root{
  --yd-mist:#F5F2EC;
  --yd-paper:#FBF9F5;
  --yd-ink:#121716;
  --yd-ink-2:#2C3432;
  --yd-teal:#1F6F6B;
  --yd-teal-deep:#12413F;
  --yd-teal-mist:#D8E7E4;
  --yd-gold:#C9A46B;
  --yd-gold-light:#EFE3CF;
  --yd-rule:#D9D6CF;
  --yd-display:"Alibaba PuHuiTi","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --yd-body:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --yd-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --yd-shell:1200px;
  --yd-gutter:clamp(18px,4vw,56px);
  --yd-pill:999px;
  --yd-shadow:0 1px 0 rgba(18,23,22,.05),0 16px 34px -26px rgba(18,23,22,.5);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;
  background:var(--yd-mist);
  color:var(--yd-ink);
  font-family:var(--yd-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,picture,svg,video{max-width:100%;display:block}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:where(a,button,[tabindex]):focus-visible{outline:2px solid var(--yd-teal);outline-offset:3px;border-radius:4px}
.yd-footer :where(a,button,[tabindex]):focus-visible{outline-color:var(--yd-gold)}
::selection{background:var(--yd-teal-mist);color:var(--yd-teal-deep)}

/* ---------- 排版 ---------- */
.yd-h1,.yd-h2,.yd-h3{
  font-family:var(--yd-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.12;
  color:var(--yd-ink);
  margin:0 0 .5em;
}
.yd-h1{font-size:clamp(34px,5.2vw,64px)}
.yd-h2{font-size:clamp(26px,3.4vw,42px)}
.yd-h3{font-size:clamp(19px,2.2vw,26px);line-height:1.28}
.yd-lead{
  font-size:clamp(17px,1.5vw,20px);
  line-height:1.8;
  color:var(--yd-ink-2);
  margin:0;
  max-width:44em;
}
.yd-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--yd-mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--yd-teal);margin:0 0 14px;
}
.yd-eyebrow::before{content:"";width:26px;height:1px;background:var(--yd-gold);flex:none}
.yd-eyebrow--on-dark{color:var(--yd-teal-mist)}
.yd-mono-note{
  font-family:var(--yd-mono);font-size:12px;letter-spacing:.06em;
  color:var(--yd-ink-2);margin:0;
}
.yd-prose{font-size:17px;line-height:1.8;color:var(--yd-ink-2);max-width:68ch}
.yd-prose p{margin:0 0 1.1em}
.yd-prose h2,.yd-prose h3{
  font-family:var(--yd-display);font-weight:800;letter-spacing:-.015em;
  color:var(--yd-ink);line-height:1.2;margin:1.8em 0 .6em;
}
.yd-prose h2{font-size:clamp(22px,2.4vw,30px)}
.yd-prose h3{font-size:19px}
.yd-prose a{color:var(--yd-teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.yd-prose a:hover{color:var(--yd-teal-deep);text-decoration-color:var(--yd-gold)}
.yd-prose ul,.yd-prose ol{margin:0 0 1.2em;padding-left:1.3em;list-style:disc}
.yd-prose ol{list-style:decimal}
.yd-prose li{margin:0 0 .4em}
.yd-prose strong{color:var(--yd-ink);font-weight:700}
.yd-rule{border:0;border-top:1px solid var(--yd-rule);margin:0}

/* ---------- 容器与网格 ---------- */
.yd-container{width:100%;max-width:var(--yd-shell);margin-inline:auto;padding-inline:var(--yd-gutter)}
.yd-container--narrow{max-width:820px}
.yd-container--wide{max-width:1360px}
.yd-section{padding-block:clamp(48px,7vw,96px)}
.yd-section--tight{padding-block:clamp(30px,4vw,56px)}
.yd-section--paper{background:var(--yd-paper)}
.yd-section--dark{background:var(--yd-teal-deep);color:var(--yd-paper)}
.yd-section--gold{background:var(--yd-gold-light)}
.yd-section--dark .yd-h1,.yd-section--dark .yd-h2,.yd-section--dark .yd-h3{color:var(--yd-paper)}
.yd-section--dark .yd-lead,.yd-section--dark .yd-prose,.yd-section--dark .yd-mono-note{color:rgba(245,242,236,.82)}
.yd-section--dark .yd-eyebrow{color:var(--yd-gold)}
.yd-section--dark .yd-eyebrow::before{background:var(--yd-gold)}
.yd-grid{display:grid;gap:clamp(16px,2.2vw,32px);grid-template-columns:repeat(12,minmax(0,1fr))}
.yd-col-4{grid-column:span 4}
.yd-col-5{grid-column:span 5}
.yd-col-6{grid-column:span 6}
.yd-col-7{grid-column:span 7}
.yd-col-8{grid-column:span 8}
.yd-col-12{grid-column:span 12}
.yd-split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(22px,3.4vw,56px);align-items:start}

/* ---------- 按钮 ---------- */
.yd-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:var(--yd-pill);
  border:1px solid transparent;
  font-family:var(--yd-display);font-weight:700;font-size:15px;
  letter-spacing:.01em;text-decoration:none;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.yd-btn__arrow{font-family:var(--yd-mono);font-size:13px;letter-spacing:0;transform:translateY(-1px)}
.yd-btn--solid{background:var(--yd-teal);color:var(--yd-paper)}
.yd-btn--solid:hover{background:var(--yd-teal-deep);transform:translateY(-2px)}
.yd-btn--ink{background:var(--yd-ink);color:var(--yd-paper)}
.yd-btn--ink:hover{background:var(--yd-teal-deep);transform:translateY(-2px)}
.yd-btn--ghost{background:transparent;color:var(--yd-ink);border-color:var(--yd-ink)}
.yd-btn--ghost:hover{background:var(--yd-ink);color:var(--yd-paper);transform:translateY(-2px)}
.yd-btn--quiet{background:var(--yd-paper);color:var(--yd-ink);border-color:var(--yd-rule)}
.yd-btn--quiet:hover{border-color:var(--yd-teal);color:var(--yd-teal);transform:translateY(-2px)}

/* ---------- 标签 / 面板 / 纸卡 ---------- */
.yd-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--yd-pill);
  border:1px solid transparent;
  background:var(--yd-teal-mist);color:var(--yd-teal-deep);
  font-family:var(--yd-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;line-height:1.6;white-space:nowrap;
}
.yd-tag--gold{background:var(--yd-gold-light);color:#6B5327}
.yd-tag--ghost{background:transparent;border-color:var(--yd-rule);color:var(--yd-ink-2)}
.yd-tag--ink{background:var(--yd-ink);color:var(--yd-paper)}
.yd-panel{
  background:var(--yd-paper);border:1px solid var(--yd-rule);
  padding:clamp(18px,2.4vw,28px);
}
.yd-panel--ink{background:var(--yd-ink);border-color:var(--yd-ink);color:var(--yd-paper)}
.yd-panel--ink .yd-mono-note{color:rgba(245,242,236,.72)}
.yd-status{
  display:flex;align-items:center;gap:10px;
  font-family:var(--yd-mono);font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--yd-ink-2);
}
.yd-status__dot{width:8px;height:8px;border-radius:50%;background:var(--yd-teal);flex:none}
.yd-status__dot--gold{background:var(--yd-gold)}
.yd-status--on-ink{color:var(--yd-teal-mist)}
.yd-sheet{
  position:relative;background:var(--yd-paper);
  border:1px solid var(--yd-rule);
  padding:clamp(20px,3vw,34px);
  box-shadow:9px 9px 0 -1px var(--yd-paper),9px 9px 0 0 var(--yd-rule);
}
.yd-sheet--gold{background:var(--yd-gold-light);box-shadow:9px 9px 0 -1px var(--yd-mist),9px 9px 0 0 var(--yd-rule)}

/* ---------- 面包屑 ---------- */
.yd-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--yd-mono);font-size:12px;letter-spacing:.06em;
  color:var(--yd-ink-2);margin:0;padding:0;list-style:none;
}
.yd-breadcrumb li{display:flex;align-items:center;gap:8px}
.yd-breadcrumb li+li::before{content:"/";color:var(--yd-rule)}
.yd-breadcrumb a{color:var(--yd-ink-2);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.yd-breadcrumb a:hover{color:var(--yd-teal);border-color:var(--yd-gold)}
.yd-breadcrumb [aria-current="page"]{color:var(--yd-teal)}

/* ---------- 图片容器基础 ---------- */
.yd-media{position:relative;overflow:hidden;margin:0;background:var(--yd-teal-mist);border:1px solid var(--yd-rule)}
.yd-media>img,.yd-media>picture>img,.yd-media>video{width:100%;height:100%;object-fit:cover;display:block}
.yd-media--4x3{aspect-ratio:4/3}
.yd-media--3x2{aspect-ratio:3/2}
.yd-media--16x9{aspect-ratio:16/9}
.yd-media--1x1{aspect-ratio:1/1}
.yd-media--3x4{aspect-ratio:3/4}
.yd-media--bleed{border:0}
.yd-media__label{
  position:absolute;left:0;bottom:0;
  padding:6px 12px;background:var(--yd-ink);color:var(--yd-paper);
  font-family:var(--yd-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
}
.yd-media figcaption{
  margin-top:10px;font-family:var(--yd-mono);font-size:11.5px;
  letter-spacing:.05em;color:var(--yd-ink-2);
}

/* ---------- 顶部跳转 ---------- */
.yd-skip{
  position:absolute;left:16px;top:-72px;z-index:200;
  padding:10px 20px;border-radius:var(--yd-pill);
  background:var(--yd-ink);color:var(--yd-paper);
  font-family:var(--yd-display);font-size:14px;font-weight:700;text-decoration:none;
  transition:top .18s ease;
}
.yd-skip:focus{top:12px}

/* ---------- 头部浮岛 ---------- */
.yd-header{
  position:sticky;top:0;z-index:90;
  padding:14px var(--yd-gutter) 12px;
  background:transparent;
}
.yd-header::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(to bottom,rgba(245,242,236,.97) 0%,rgba(245,242,236,.86) 58%,rgba(245,242,236,0) 100%);
}
.yd-header__inner{
  position:relative;z-index:2;
  width:100%;max-width:var(--yd-shell);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.yd-brand{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 18px 10px 16px;
  background:var(--yd-paper);border:1px solid var(--yd-rule);
  border-radius:var(--yd-pill);box-shadow:var(--yd-shadow);
  color:var(--yd-ink);text-decoration:none;white-space:nowrap;
  transition:transform .18s ease,border-color .18s ease;
}
.yd-brand:hover{transform:translateY(-2px);border-color:var(--yd-teal-mist)}
.yd-brand__mark{font-family:var(--yd-display);font-weight:800;font-size:19px;letter-spacing:.06em}
.yd-brand__divider{width:1px;height:14px;background:var(--yd-rule);flex:none}
.yd-brand__line{font-family:var(--yd-mono);font-size:11px;letter-spacing:.22em;color:var(--yd-teal)}
.yd-brand__lamp{width:6px;height:6px;border-radius:50%;background:var(--yd-gold);box-shadow:0 0 0 3px rgba(201,164,107,.22);flex:none}
.yd-navtoggle{
  display:none;align-items:center;gap:9px;
  padding:10px 16px;border:1px solid var(--yd-rule);border-radius:var(--yd-pill);
  background:var(--yd-paper);color:var(--yd-ink);
  font-family:var(--yd-display);font-size:13px;font-weight:700;letter-spacing:.08em;
  cursor:pointer;box-shadow:var(--yd-shadow);
}
.yd-navtoggle__bars{display:grid;gap:3px;width:16px;flex:none}
.yd-navtoggle__bars span{display:block;height:2px;background:var(--yd-teal);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.yd-navtoggle[aria-expanded="true"] .yd-navtoggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.yd-navtoggle[aria-expanded="true"] .yd-navtoggle__bars span:nth-child(2){opacity:0}
.yd-navtoggle[aria-expanded="true"] .yd-navtoggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.yd-nav{
  display:flex;align-items:center;gap:6px;
  padding:6px;
  background:rgba(251,249,245,.95);
  border:1px solid var(--yd-rule);border-radius:var(--yd-pill);
  box-shadow:var(--yd-shadow);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.yd-nav__list{display:flex;align-items:center;gap:2px}
.yd-nav__link{
  display:inline-block;padding:8px 13px;border-radius:var(--yd-pill);
  font-family:var(--yd-display);font-size:14px;font-weight:600;letter-spacing:.01em;
  color:var(--yd-ink-2);text-decoration:none;
  transition:color .18s ease,background-color .18s ease;
}
.yd-nav__link:hover{color:var(--yd-teal);background:var(--yd-teal-mist)}
.yd-nav__link[aria-current="page"]{color:var(--yd-paper);background:var(--yd-teal-deep)}
.yd-nav__link[aria-current="page"]:hover{color:var(--yd-paper);background:var(--yd-teal)}
.yd-nav__cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 17px;border-radius:var(--yd-pill);
  background:var(--yd-teal);color:var(--yd-paper);text-decoration:none;
  font-family:var(--yd-display);font-size:14px;font-weight:700;white-space:nowrap;
  transition:background-color .18s ease,transform .18s ease;
}
.yd-nav__cta:hover{background:var(--yd-teal-deep);transform:translateY(-2px)}
.yd-progress{
  position:absolute;left:50%;bottom:5px;transform:translateX(-50%);
  width:min(var(--yd-shell),calc(100% - 2 * var(--yd-gutter)));
  height:2px;border-radius:2px;overflow:hidden;
  background:rgba(31,111,107,.14);z-index:2;pointer-events:none;
}
.yd-progress__bar{display:block;width:0;height:100%;background:var(--yd-teal);border-radius:2px}

/* ---------- 页脚封底 ---------- */
.yd-footer{
  background:var(--yd-teal-deep);color:var(--yd-paper);
  margin-top:clamp(48px,8vw,120px);
}
.yd-footer__inner{
  max-width:var(--yd-shell);margin-inline:auto;
  padding:clamp(40px,6vw,80px) var(--yd-gutter) 28px;
}
.yd-footer__lead{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:24px;padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid rgba(245,242,236,.18);
}
.yd-footer__leadtxt{max-width:36em}
.yd-footer__statement{
  font-family:var(--yd-display);font-weight:800;
  font-size:clamp(22px,3vw,36px);line-height:1.26;letter-spacing:-.01em;
  margin:0;color:var(--yd-paper);
}
.yd-footer__cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:var(--yd-pill);
  border:1px solid var(--yd-gold);color:var(--yd-gold);
  font-family:var(--yd-display);font-size:15px;font-weight:700;text-decoration:none;
  transition:background-color .18s ease,color .18s ease,transform .18s ease;
}
.yd-footer__cta:hover{background:var(--yd-gold);color:var(--yd-teal-deep);transform:translateY(-2px)}
.yd-footer__grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding-block:clamp(26px,4vw,46px);
}
.yd-footer__col{min-width:0}
.yd-footer__title{
  display:flex;align-items:baseline;gap:9px;
  font-family:var(--yd-display);font-size:13px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--yd-teal-mist);
  margin:0 0 15px;
}
.yd-footer__num{font-family:var(--yd-mono);font-size:11px;letter-spacing:.1em;color:var(--yd-gold)}
.yd-footer__list{display:grid;gap:9px}
.yd-footer__list a{
  display:inline-block;color:rgba(245,242,236,.82);text-decoration:none;
  font-size:15px;line-height:1.6;border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.yd-footer__list a:hover{color:var(--yd-paper);border-bottom-color:var(--yd-gold)}
.yd-footer__contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(268px,1fr));
  gap:8px 32px;padding-top:22px;
  border-top:1px solid rgba(245,242,236,.18);
}
.yd-footer__line{
  margin:0;font-size:14px;line-height:1.7;
  color:rgba(245,242,236,.8);word-break:break-word;
}
.yd-footer__key{
  display:inline-block;min-width:5.5em;margin-right:10px;
  font-family:var(--yd-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--yd-gold);
}
.yd-footer__note{
  margin:6px 0 0;font-family:var(--yd-mono);font-size:11.5px;
  letter-spacing:.04em;line-height:1.8;color:rgba(245,242,236,.6);
  grid-column:1 / -1;
}
.yd-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;margin-top:24px;padding-top:18px;
  border-top:1px solid rgba(245,242,236,.18);
  font-family:var(--yd-mono);font-size:11.5px;letter-spacing:.06em;
}
.yd-footer__copy{margin:0;color:rgba(245,242,236,.62)}

/* ---------- 滚动显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .yd-header__inner{flex-wrap:wrap;row-gap:8px}
  .yd-navtoggle{display:inline-flex}
  .yd-nav{
    order:3;flex-basis:100%;width:100%;
    flex-direction:column;align-items:stretch;gap:8px;
    padding:0 6px;max-height:0;opacity:0;overflow:hidden;
    border-color:transparent;background:transparent;box-shadow:none;
    -webkit-backdrop-filter:none;backdrop-filter:none;
    transition:max-height .32s ease,opacity .24s ease,padding .32s ease;
  }
  .yd-header[data-open] .yd-nav{
    max-height:300px;opacity:1;padding:8px;
    background:rgba(251,249,245,.97);
    border-color:var(--yd-rule);box-shadow:var(--yd-shadow);
  }
  .yd-nav__list{
    flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;
    width:100%;padding-bottom:2px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  .yd-nav__list::-webkit-scrollbar{display:none}
  .yd-nav__link{
    white-space:nowrap;
    border:1px solid var(--yd-rule);background:var(--yd-paper);
  }
  .yd-nav__cta{justify-content:center}
  .yd-split{grid-template-columns:minmax(0,1fr)}
  .yd-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .yd-col-4,.yd-col-5,.yd-col-6,.yd-col-7,.yd-col-8{grid-column:span 12}
}
@media (max-width:720px){
  html{scroll-padding-top:88px}
  body{font-size:16.5px;line-height:1.78}
  .yd-section{padding-block:clamp(36px,8vw,52px)}
  .yd-header{padding:10px var(--yd-gutter) 10px}
  .yd-brand{padding:9px 14px;gap:8px}
  .yd-brand__mark{font-size:17px}
  .yd-brand__line{display:none}
  .yd-progress{bottom:3px}
  .yd-sheet{box-shadow:6px 6px 0 -1px var(--yd-paper),6px 6px 0 0 var(--yd-rule)}
  .yd-footer__lead{flex-direction:column;align-items:flex-start}
  .yd-footer__cta{width:100%;justify-content:center}
  .yd-footer__grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .yd-footer__contact{grid-template-columns:minmax(0,1fr)}
  .yd-footer__base{flex-direction:column;align-items:flex-start;gap:6px}
}
@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;
  }
  [data-reveal]{opacity:1;transform:none}
  .yd-progress__bar{transition:none}
}