:root{
  --green:#0B6E4F;
  --green-deep:#06412F;
  --cream:#FAF5EA;
  --bran:#EDE4D3;
  --ink:#1C1C1E;
  --orange:#FF6B35;
  --blue:#1B9AAA;
  --brick:#C4451F;
  --moss:#6E8078;
  --white:#FFFFFF;
  --glass:rgba(250,245,234,.72);
  --rail:88px;
  --header-h:72px;
  --shell:1320px;
  --gap:24px;
  --pad:32px;
  --radius:3px;
  --font-display:Impact,Haettenschweiler,"Arial Narrow Bold","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Consolas,"Liberation Mono",monospace;
  --shadow-hard:4px 4px 0 rgba(28,28,30,.12);
  --shadow-lift:8px 10px 20px rgba(28,28,30,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}

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

body{
  background-color:var(--cream);
  background-image:
    linear-gradient(to right,rgba(110,128,120,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(110,128,120,.09) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  padding-left:var(--rail);
  transition:padding-left 220ms var(--ease);
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.03;
  letter-spacing:-.01em;
}
h1{font-size:clamp(2.6rem,7vw,5.4rem);line-height:.98}
h2{font-size:clamp(1.6rem,3.4vw,2.6rem);line-height:1.04}
h3{font-size:clamp(1.15rem,1.8vw,1.45rem);line-height:1.18;font-weight:900}
h4{font-size:1.05rem;line-height:1.3}

.num{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--orange);
  outline-offset:2px;
  border-radius:2px;
}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}

.skip-link{
  position:fixed;
  top:10px;
  left:calc(var(--rail) + 10px);
  z-index:200;
  transform:translateY(-240%);
  background:var(--ink);
  color:var(--cream);
  padding:10px 18px;
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  text-decoration:none;
  transition:transform 180ms var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 品牌轨道 ---------- */
.rail{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail);
  z-index:70;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  padding:18px 0 22px;
  background:rgba(250,245,234,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-right:1px solid var(--bran);
  transition:width 220ms var(--ease);
}
.rail__mark{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  text-decoration:none;
  color:var(--ink);
}
.rail__mark-zh{
  writing-mode:vertical-rl;
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:.22em;
  line-height:1;
}
.rail__mark-en{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--green);
}
.rail__label{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.32em;
  color:var(--moss);
}
.rail__track{
  position:relative;
  flex:1;
  width:2px;
  margin:8px 0;
  background:linear-gradient(to bottom,var(--bran),rgba(237,228,211,.4));
  border-radius:2px;
}
.rail__cursor{
  position:absolute;
  left:-3px;
  top:0;
  width:8px;
  height:34px;
  border-radius:1px;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,107,53,.16);
  transition:top 120ms linear;
}
.rail__quick{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px 6px;
  background:var(--green);
  color:var(--white);
  text-decoration:none;
  border-radius:2px;
  box-shadow:0 3px 0 var(--green-deep);
  transition:background-color 180ms var(--ease),transform 180ms var(--ease);
}
.rail__quick:hover{background:var(--orange);color:var(--ink);transform:translateY(-2px)}
.rail__quick-zh{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.24em;
}

/* ---------- 顶栏 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:var(--rail);
  right:0;
  z-index:60;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease),left 220ms var(--ease);
}
.site-header__inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--pad);
  display:flex;
  align-items:center;
  gap:26px;
}
[data-scrolled="true"] .site-header{
  background:var(--cream);
  border-bottom-color:var(--bran);
  box-shadow:0 1px 0 rgba(28,28,30,.03);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--ink);
  flex:0 0 auto;
}
.brand__chip{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:5px 7px;
  border-radius:2px;
  background:var(--green);
  color:var(--white);
}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:.04em;
  line-height:1;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--moss);
  padding-left:10px;
  border-left:1px solid var(--bran);
  line-height:1.4;
}

.nav{margin-left:auto;position:static}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav__item{display:block}
.nav__link{
  position:relative;
  display:inline-block;
  padding:9px 12px;
  font-size:14.5px;
  line-height:1.2;
  text-decoration:none;
  color:var(--ink);
  border-radius:2px;
  transition:color 180ms var(--ease),background-color 180ms var(--ease);
}
.nav__link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:3px;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms var(--ease);
}
.nav__link:hover{color:var(--green-deep);background:rgba(237,228,211,.55)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{
  color:var(--green-deep);
  font-weight:700;
  background:rgba(11,110,79,.08);
}
.nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--green);
}
.nav__foot{display:none}

.site-header__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:var(--green);
  --btn-fg:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-family:var(--font-body);
  font-weight:700;
  font-size:15px;
  line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  background:var(--btn-bg);
  color:var(--btn-fg);
  cursor:pointer;
  box-shadow:4px 4px 0 rgba(28,28,30,.16);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(28,28,30,.22)}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 rgba(28,28,30,.18)}
.btn--primary{--btn-bg:var(--green);--btn-fg:#fff}
.btn--orange{--btn-bg:var(--orange);--btn-fg:var(--ink)}
.btn--ghost{
  --btn-bg:transparent;
  --btn-fg:var(--ink);
  border-color:rgba(28,28,30,.28);
  box-shadow:none;
}
.btn--ghost:hover{background:var(--bran);box-shadow:none;transform:none}
.btn--sm{padding:8px 14px;font-size:13.5px}
.btn--block{display:flex;width:100%}

/* ---------- 移动按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  background:var(--white);
  border:1px solid var(--bran);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ink);
  cursor:pointer;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.nav-toggle[aria-expanded="true"]{
  background:var(--ink);
  color:var(--cream);
  border-color:var(--ink);
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:background-color 160ms var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform 160ms var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* ---------- 容器与网格 ---------- */
main#main-content{display:block;padding-top:var(--header-h)}
.bleed-top{margin-top:calc(-1 * var(--header-h))}
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.section{padding-block:clamp(48px,7vw,96px)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.stack{display:flex;flex-direction:column;gap:var(--gap)}

/* ---------- 文本与索引组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--green);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--orange)}
.prose{max-width:40em;font-size:17px;line-height:1.75;color:#26262a}
.prose p + p{margin-top:1.1em}
.prose ul,.prose ol{margin-top:1em;padding-left:1.3em;list-style:disc}
.prose li + li{margin-top:.4em}
.prose a{color:var(--green-deep);text-decoration:underline;text-decoration-color:var(--blue);text-underline-offset:3px}
.prose strong{font-weight:700;color:var(--ink)}
.rule{height:1px;border:0;background:var(--bran)}

.tag{
  display:inline-block;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.5;
  border-radius:2px;
  background:rgba(27,154,170,.14);
  color:#0f6b76;
}
.tag--orange{background:rgba(255,107,53,.2);color:#a83a13}

.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 14px;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.3;
  border:1px solid transparent;
  border-radius:999px;
  background:var(--bran);
  color:var(--ink);
  cursor:pointer;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.chip:hover{background:#e2d7c2}
.chip[aria-pressed="true"],.chip.is-active{
  background:var(--green);
  color:var(--white);
  border-color:var(--green);
}

/* ---------- 卡片与图片容器 ---------- */
.card{
  position:relative;
  padding:22px;
  background:var(--white);
  border:1px solid var(--bran);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.card:hover,.card:focus-within{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lift);
  border-color:rgba(11,110,79,.4);
}

.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border-radius:2px;
  background:
    linear-gradient(135deg,var(--bran) 0%,#dcd0bb 48%,rgba(11,110,79,.9) 100%);
}
.media > img,.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.card:hover .media > img{transform:scale(1.03)}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}

/* ---------- 装饰带 ---------- */
.slant{
  height:clamp(26px,5vw,54px);
  background:var(--green);
  clip-path:polygon(0 0,100% 0,100% 55%,0 100%);
}
.slant--bran{background:var(--bran)}
.slant--orange{background:var(--orange)}

.speedlines{
  height:14px;
  background-color:var(--green);
  background-image:repeating-linear-gradient(100deg,transparent 0 16px,rgba(250,245,234,.5) 16px 20px,transparent 20px 36px);
  animation:speed-drift 8s linear infinite;
}
@keyframes speed-drift{from{background-position:0 0}to{background-position:360px 0}}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:18px}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--moss)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(110,128,120,.6)}
.breadcrumb__link{color:var(--green-deep);text-decoration:none;border-bottom:1px solid var(--blue)}
.breadcrumb__link:hover{color:var(--brick);border-bottom-color:var(--brick)}
.breadcrumb__current{color:var(--ink);font-weight:600}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,128px);
  background:var(--green-deep);
  color:rgba(250,245,234,.86);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:6px;
  background:repeating-linear-gradient(100deg,var(--orange) 0 30px,transparent 30px 62px);
  opacity:.95;
}
.site-footer__top{
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--pad) 0;
  display:grid;
  grid-template-columns:1.05fr 1.7fr 1fr;
  gap:clamp(24px,4vw,56px);
}
.site-footer__brand{display:flex;flex-direction:column;align-items:flex-start}
.site-footer__mark{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.28em;
  color:var(--orange);
}
.site-footer__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2rem,4vw,3rem);
  line-height:1;
  color:var(--cream);
  margin-top:12px;
}
.site-footer__slogan{
  margin-top:14px;
  max-width:20em;
  font-size:15px;
  line-height:1.7;
  color:rgba(250,245,234,.72);
}
.site-footer__brand .btn{margin-top:22px}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
}
.footer-nav__col{min-width:0}
.footer-nav__title{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.24em;
  color:rgba(250,245,234,.55);
  margin-bottom:14px;
  text-transform:uppercase;
  line-height:1.4;
}
.footer-nav__list{display:flex;flex-direction:column;gap:9px}
.footer-nav__link{
  display:inline-block;
  font-size:15px;
  line-height:1.5;
  color:rgba(250,245,234,.86);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.footer-nav__link:hover{color:var(--white);border-bottom-color:var(--blue)}

.footer-contact{min-width:0}
.footer-contact__list{display:flex;flex-direction:column;gap:12px}
.footer-contact__row{display:flex;flex-direction:column;gap:2px}
.footer-contact__row dt{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(250,245,234,.5);
}
.footer-contact__row dd{
  margin:0;
  font-size:14.5px;
  line-height:1.6;
  color:rgba(250,245,234,.9);
  word-break:break-word;
}
.footer-contact__note{
  margin-top:16px;
  font-size:12.5px;
  line-height:1.8;
  color:rgba(250,245,234,.6);
  max-width:26em;
}

.site-footer__bottom{
  max-width:var(--shell);
  margin:clamp(28px,4vw,48px) auto 0;
  padding:18px var(--pad) 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  border-top:1px solid rgba(250,245,234,.16);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(250,245,234,.6);
}
.site-footer__legal{color:rgba(250,245,234,.72)}
.site-footer__copy{margin-left:auto}
.site-footer__tick{
  color:var(--orange);
  letter-spacing:.12em;
}

/* ---------- 平板 ---------- */
@media (max-width:1099px){
  :root{--gap:20px;--pad:24px}
  .site-header__inner{gap:18px}
  .nav__link{padding:9px 9px;font-size:13.5px}
  .brand__sub{padding-left:8px;font-size:10px}
  .site-footer__top{grid-template-columns:1fr 1fr}
  .site-footer__brand{grid-column:1 / -1}
}

/* ---------- 移动 ---------- */
@media (max-width:899px){
  :root{--rail:0px;--header-h:64px;--pad:18px}
  body{padding-left:0;background-size:26px 26px}
  .rail{display:none}
  .site-header{left:0}
  .site-header__inner{gap:14px}
  .brand__sub{display:none}
  .brand__name{font-size:19px}
  .site-header__actions{margin-left:auto}
  .nav-toggle{display:inline-flex}

  .nav{
    position:fixed;
    left:12px;
    right:12px;
    bottom:calc(12px + env(safe-area-inset-bottom,0px));
    max-height:calc(100dvh - 110px);
    overflow-y:auto;
    padding:14px;
    margin:0;
    z-index:90;
    background:rgba(250,245,234,.98);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border:1px solid var(--bran);
    border-radius:4px;
    box-shadow:0 18px 44px rgba(28,28,30,.24);
    opacity:0;
    visibility:hidden;
    transform:translateY(16px) scale(.99);
    transition:opacity 200ms var(--ease),transform 200ms var(--ease),visibility 200ms;
  }
  .nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:translateY(0) scale(1);
  }
  .nav__list{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .nav__link{
    display:block;
    padding:13px 14px;
    font-size:15px;
    background:var(--white);
    border:1px solid var(--bran);
    border-radius:2px;
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{
    background:var(--green);
    color:var(--white);
    border-color:var(--green);
  }
  .nav__link[aria-current="page"]::after{display:none}
  .nav__foot{
    display:grid;
    gap:8px;
    margin-top:12px;
    padding-top:12px;
    border-top:1px dashed rgba(28,28,30,.16);
  }

  .site-footer__top{grid-template-columns:1fr;padding-top:clamp(32px,7vw,48px)}
  .footer-nav{grid-template-columns:1fr 1fr;gap:22px}
  .site-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .site-footer__copy{margin-left:0}
  .speedlines{animation:none}
}

@media (max-width:639px){
  .site-header__actions .btn--sm{display:none}
  .footer-nav{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  h1{font-size:clamp(2.2rem,10vw,3.2rem)}
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .speedlines{animation:none}
  .rail__cursor{transition:none}
}