:root{
  --ink-night:#0B2E24;
  --ink-stand:#123F32;
  --moss:#1E5B46;
  --warm:#F7F3E8;
  --milk:#FFFDF6;
  --flame:#FF6A2A;
  --amber:#FFB347;
  --metal:#8C9494;
  --mist:#D9DED9;
  --deep:#10201B;
  --signal:#3DDC97;

  --font-display:"Oswald","Barlow Condensed","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-editorial:"Source Han Serif SC","Noto Serif CJK SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --maxw:1200px;
  --pill:999px;
  --radius-lg:26px;
  --radius-md:18px;
  --shadow-card:0 26px 50px -34px rgba(11,46,36,.62);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--warm);
  color:var(--deep);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.012em;
}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit}
button{font-family:inherit}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:6px}
#main-content{scroll-margin-top:112px}

/* ============ 跳过链接 ============ */
.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  z-index:200;
  transform:translate(-50%,-180%);
  display:inline-flex;
  align-items:center;
  padding:.62em 1.15em;
  border-radius:var(--pill);
  background-color:var(--flame);
  color:var(--deep);
  font-size:.9rem;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  box-shadow:0 16px 32px -18px rgba(11,46,36,.9);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0)}

/* ============ 头部：悬浮胶囊浮岛 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:14px clamp(10px,3vw,28px) 12px;
  background-image:linear-gradient(180deg,rgba(11,46,36,.07),rgba(11,46,36,0) 86%);
  color:var(--warm);
  pointer-events:none;
}
.header-shell{
  pointer-events:auto;
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,24px);
  width:min(var(--maxw),100%);
  margin:0 auto;
  padding:9px clamp(12px,2vw,18px) 9px clamp(10px,1.6vw,14px);
  border-radius:var(--pill);
  background-image:linear-gradient(115deg,rgba(11,46,36,.96) 0%,rgba(18,63,50,.95) 56%,rgba(30,91,70,.93) 100%);
  border:1px solid rgba(217,222,217,.16);
  box-shadow:0 22px 46px -28px rgba(11,46,36,.95),inset 0 1px 0 rgba(247,243,232,.08);
  -webkit-backdrop-filter:blur(10px) saturate(130%);
  backdrop-filter:blur(10px) saturate(130%);
  color:var(--warm);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  text-decoration:none;
  color:inherit;
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  flex:0 0 auto;
  background-color:var(--warm);
  clip-path:polygon(14% 0,100% 0,86% 100%,0 100%);
  transition:transform .22s var(--ease);
}
.brand:hover .brand-mark{transform:translateY(-2px)}
.brand-mark-bar{
  width:16px;
  height:3px;
  border-radius:2px;
  background-color:var(--ink-night);
  box-shadow:0 -6px 0 var(--ink-night),0 6px 0 var(--flame);
}
.brand-mark-spark{
  position:absolute;
  top:7px;
  right:7px;
  width:5px;
  height:5px;
  border-radius:50%;
  background-color:var(--flame);
}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.02rem;
  letter-spacing:.07em;
  color:var(--warm);
}
.brand-tagline{
  margin-top:2px;
  font-size:.66rem;
  letter-spacing:.04em;
  color:rgba(247,243,232,.6);
  white-space:nowrap;
}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 14px;
  border-radius:var(--pill);
  border:1px solid rgba(247,243,232,.3);
  background-color:rgba(30,91,70,.6);
  color:var(--warm);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.1em;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{background-color:rgba(30,91,70,.95);border-color:rgba(255,106,42,.65)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:12px}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  border-radius:2px;
  background-color:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle-bars::before{top:2px}
.nav-toggle-bars::after{top:8px}
.nav-toggle-label{white-space:nowrap}
.site-header[data-open="true"] .nav-toggle{
  background-color:var(--flame);
  border-color:var(--flame);
  color:var(--deep);
}
.site-header[data-open="true"] .nav-toggle-bars::before{top:5px;transform:rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars::after{top:5px;transform:rotate(-45deg)}

/* 主导航 */
.primary-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(6px,1.2vw,16px);
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{list-style:none}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 12px;
  border-radius:var(--pill);
  font-size:.9rem;
  font-weight:600;
  color:rgba(247,243,232,.76);
  text-decoration:none;
  transition:color .18s var(--ease),background-color .18s var(--ease),transform .18s var(--ease);
}
.nav-link:hover{
  color:var(--warm);
  background-color:rgba(30,91,70,.9);
  transform:translateY(-2px);
}
.nav-link[aria-current="page"]{
  color:var(--warm);
  background-color:rgba(30,91,70,.98);
  box-shadow:inset 0 0 0 1px rgba(247,243,232,.12);
}
.nav-link[aria-current="page"]::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background-color:var(--flame);
  box-shadow:0 0 0 3px rgba(255,106,42,.22);
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-left:6px;
  padding:9px 16px;
  border-radius:var(--pill);
  background-color:var(--flame);
  color:var(--deep);
  font-size:.88rem;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 12px 24px -14px rgba(255,106,42,.95);
  transition:background-color .18s var(--ease),transform .18s var(--ease);
}
.nav-cta:hover{background-color:var(--amber);transform:translateY(-2px)}

/* 阅读进度 */
.site-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  pointer-events:none;
  background-image:linear-gradient(90deg,var(--flame),var(--amber));
  transform:scaleX(var(--scroll,0));
  transform-origin:0 50%;
  transition:transform .08s linear;
}

/* ============ 页脚：看台交接区 ============ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background-color:var(--ink-night);
  color:var(--warm);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:-42% -12% auto -12%;
  height:78%;
  background-image:radial-gradient(58% 62% at 18% 24%,rgba(61,220,151,.14),transparent 70%),
                   radial-gradient(52% 56% at 86% 0%,rgba(255,106,42,.17),transparent 72%);
  pointer-events:none;
}
.footer-rail{
  height:6px;
  background-color:rgba(247,243,232,.07);
  background-image:repeating-linear-gradient(115deg,var(--flame) 0 22px,transparent 22px 46px);
}
.footer-shell{
  position:relative;
  z-index:1;
  width:min(var(--maxw),100%);
  margin:0 auto;
  padding:clamp(32px,5vw,60px) clamp(16px,4vw,32px) clamp(18px,3vw,26px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,3.4vw,44px);
}
.footer-brand-link{
  display:inline-block;
  padding-bottom:3px;
  border-bottom:2px solid var(--flame);
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.45rem;
  letter-spacing:.07em;
  color:var(--warm);
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-brand-link:hover{color:var(--amber);border-color:var(--amber)}
.footer-intro{
  margin-top:14px;
  max-width:36ch;
  font-size:.94rem;
  line-height:1.7;
  color:rgba(247,243,232,.72);
}
.footer-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  padding:5px 13px;
  border-radius:var(--pill);
  background-color:rgba(61,220,151,.12);
  border:1px solid rgba(61,220,151,.3);
  color:#BFF3DC;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
}
.footer-badge::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background-color:var(--signal);
  box-shadow:0 0 0 3px rgba(61,220,151,.2);
}
.footer-contact{
  display:flex;
  flex-direction:column;
  gap:8px;
  margin-top:20px;
  font-style:normal;
  font-size:.86rem;
  color:rgba(247,243,232,.78);
}
.contact-line{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.contact-label{
  flex:0 0 auto;
  min-width:2.6em;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  color:var(--metal);
}
.contact-value{color:var(--warm);word-break:break-word}
.contact-note{
  margin-top:2px;
  font-size:.76rem;
  line-height:1.6;
  color:rgba(247,243,232,.55);
}
.footer-col-title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--metal);
}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-link{
  display:inline-block;
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  font-size:.9rem;
  color:rgba(247,243,232,.78);
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible{color:var(--amber);border-color:currentColor}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid rgba(247,243,232,.14);
  font-size:.78rem;
  color:rgba(247,243,232,.6);
}
.footer-copy{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:rgba(247,243,232,.6);
}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.footer-icp{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:rgba(247,243,232,.55);
}
.footer-meta .footer-link{font-size:.78rem;color:rgba(247,243,232,.62)}

/* ============ 基础排版与容器 ============ */
.container{
  width:min(var(--maxw),100%);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,32px);
}
.section{position:relative;padding-block:clamp(42px,6vw,88px)}
.section--light{background-color:var(--warm);color:var(--deep)}
.section--milk{background-color:var(--milk);color:var(--deep)}
.section--dark{
  background-color:var(--ink-night);
  color:var(--warm);
  background-image:radial-gradient(900px 320px at 12% -8%,rgba(61,220,151,.12),transparent 70%),
                   repeating-linear-gradient(90deg,rgba(247,243,232,.045) 0 1px,transparent 1px 96px);
}
.section-head{max-width:66ch}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:#B33F0F;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background-color:currentColor;
}
.section--dark .eyebrow{color:var(--amber)}
.section-title{
  margin:.42em 0 .38em;
  font-size:clamp(1.6rem,3.1vw,2.35rem);
  font-weight:800;
  line-height:1.18;
}
.section-lede{
  max-width:62ch;
  font-size:1.02rem;
  line-height:1.75;
  color:rgba(16,32,27,.72);
}
.section--dark .section-lede{color:rgba(247,243,232,.74)}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.72em 1.32em;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-body);
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--flame{
  background-color:var(--flame);
  color:var(--deep);
  box-shadow:0 16px 30px -18px rgba(255,106,42,.95);
}
.btn--flame:hover{background-color:var(--amber)}
.btn--ghost{
  background-color:transparent;
  border-color:rgba(247,243,232,.42);
  color:var(--warm);
}
.btn--ghost:hover{background-color:rgba(247,243,232,.14);border-color:rgba(247,243,232,.7)}
.btn--ink{
  background-color:var(--deep);
  color:var(--warm);
}
.btn--ink:hover{background-color:var(--ink-stand)}

/* ============ 卡片与 Bento ============ */
.slant-card{
  position:relative;
  padding:clamp(18px,2.5vw,28px);
  border:1px solid var(--mist);
  border-radius:var(--radius-lg) var(--radius-lg) var(--radius-lg) 8px;
  background-color:var(--milk);
  color:var(--deep);
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.slant-card:hover{transform:translateY(-3px);box-shadow:0 32px 56px -34px rgba(11,46,36,.7)}
.slant-card--ink{
  background-color:var(--ink-stand);
  border-color:rgba(247,243,232,.16);
  color:var(--warm);
}
.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(12px,1.6vw,20px);
}
.bento__cell{grid-column:span 12;min-width:0}
@media (min-width:720px){
  .bento__cell--half{grid-column:span 6}
  .bento__cell--third{grid-column:span 4}
  .bento__cell--wide{grid-column:span 8}
  .bento__cell--narrow{grid-column:span 4}
}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.28em .72em;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.08em;
  background-color:rgba(140,148,148,.16);
  color:#2C3A35;
}
.tag--flame{
  background-color:rgba(255,106,42,.14);
  border-color:rgba(255,106,42,.36);
  color:#B33F0F;
}
.tag--signal{
  background-color:rgba(61,220,151,.16);
  border-color:rgba(61,220,151,.34);
  color:#146B4A;
}
.tag--dark{
  background-color:rgba(247,243,232,.12);
  border-color:rgba(247,243,232,.2);
  color:var(--warm);
}

/* ============ 面包屑 ============ */
.breadcrumb{font-size:.82rem}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5em}
.breadcrumb-item{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  color:rgba(16,32,27,.62);
}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  color:var(--metal);
}
.breadcrumb-item[aria-current="page"]{color:var(--deep);font-weight:700}
.breadcrumb-link{
  border-bottom:1px solid transparent;
  text-decoration:none;
  color:inherit;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumb-link:hover{color:#B33F0F;border-color:currentColor}

/* ============ 正文 ============ */
.prose{max-width:72ch;font-size:1.02rem;line-height:1.78}
.prose > * + *{margin-top:1em}
.prose h2{margin-top:1.8em;font-size:1.3rem;letter-spacing:-.01em}
.prose h3{margin-top:1.5em;font-size:1.1rem}
.prose ul{list-style:none;padding-left:1.1em}
.prose li{position:relative;margin-bottom:.45em}
.prose li::before{
  content:"";
  position:absolute;
  left:-1.05em;
  top:.72em;
  width:6px;
  height:6px;
  border-radius:1px;
  background-color:var(--flame);
}
.prose a{color:#B33F0F;text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--flame)}
.prose blockquote{
  margin:1.5em 0;
  padding-left:1.05em;
  border-left:3px solid var(--flame);
  font-family:var(--font-editorial);
  font-size:1.1rem;
  color:var(--ink-stand);
}
.section--dark .prose{color:rgba(247,243,232,.82)}
.section--dark .prose blockquote{color:var(--warm)}
.divider{
  height:1px;
  margin:clamp(24px,3vw,40px) 0;
  border:0;
  background-color:var(--mist);
}
.section--dark .divider{background-color:rgba(247,243,232,.16)}

/* ============ 图片容器基础规则 ============ */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/10;
  border-radius:var(--radius-lg) var(--radius-lg) var(--radius-lg) 6px;
  background-image:linear-gradient(135deg,var(--ink-stand),var(--moss) 62%,#2A6B52);
  isolation:isolate;
}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.media-frame__cap{
  position:absolute;
  inset:auto 0 0 0;
  padding:clamp(12px,2vw,20px);
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.02em;
  color:var(--warm);
  background-image:linear-gradient(180deg,transparent,rgba(11,46,36,.88));
}

/* ============ 研究板 / 面板 ============ */
.panel{
  padding:clamp(16px,2.4vw,26px);
  border:1px solid var(--mist);
  border-radius:var(--radius-md);
  background-color:var(--milk);
  color:var(--deep);
}
.panel--dark{
  background-color:var(--ink-stand);
  border-color:rgba(247,243,232,.16);
  color:var(--warm);
}
.panel-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  margin-bottom:.85em;
}
.panel-title{
  margin:0;
  font-family:var(--font-display);
  font-size:1.05rem;
  font-weight:800;
  letter-spacing:.02em;
}
.panel-body{
  font-size:.95rem;
  line-height:1.72;
  color:rgba(16,32,27,.76);
}
.panel--dark .panel-body{color:rgba(247,243,232,.78)}

/* ============ 数据行 ============ */
.data-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:.6em 0;
  border-bottom:1px solid var(--mist);
}
.data-row:last-child{border-bottom:0}
.data-key{font-size:.85rem;color:rgba(16,32,27,.6)}
.data-val{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  color:var(--deep);
}
.section--dark .data-row,
.panel--dark .data-row{border-color:rgba(247,243,232,.16)}
.section--dark .data-key,
.panel--dark .data-key{color:rgba(247,243,232,.62)}
.section--dark .data-val,
.panel--dark .data-val{color:var(--warm)}

/* ============ 标签页 ============ */
.tabs{display:block}
.tabs-list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  padding:6px;
  border-radius:var(--pill);
  background-color:rgba(30,91,70,.14);
}
.tabs-btn{
  appearance:none;
  padding:.55em 1.05em;
  border:0;
  border-radius:var(--pill);
  background-color:transparent;
  color:#2C3A35;
  font-family:var(--font-body);
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.tabs-btn:hover{background-color:rgba(18,63,50,.14)}
.tabs-btn[aria-selected="true"]{
  background-color:var(--ink-stand);
  color:var(--warm);
  box-shadow:0 10px 20px -14px rgba(11,46,36,.95);
}
.tabs-panel{margin-top:clamp(16px,2.4vw,26px)}
.tabs-panel[hidden]{display:none}
.tabs--dark .tabs-list{
  background-color:rgba(247,243,232,.1);
  border:1px solid rgba(247,243,232,.14);
}
.tabs--dark .tabs-btn{color:rgba(247,243,232,.74)}
.tabs--dark .tabs-btn:hover{background-color:rgba(247,243,232,.14)}
.tabs--dark .tabs-btn[aria-selected="true"]{background-color:var(--flame);color:var(--deep)}

/* ============ 网格 ============ */
.grid-2{display:grid;grid-template-columns:1fr;gap:clamp(16px,2.4vw,28px)}
.grid-3{display:grid;grid-template-columns:1fr;gap:clamp(16px,2.2vw,26px)}
.auto-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));
  gap:clamp(14px,2vw,24px);
}
@media (min-width:820px){
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ============ 显现 ============ */
.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .brand-tagline{display:none}
}
@media (max-width:960px){
  .site-header{padding:10px 12px 8px}
  .header-shell{
    gap:8px;
    padding:8px 12px;
    border-radius:22px;
  }
  .brand-mark{width:32px;height:32px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:12px;
    border-radius:24px;
    border:1px solid rgba(217,222,217,.16);
    background-image:linear-gradient(160deg,rgba(11,46,36,.99),rgba(18,63,50,.99));
    box-shadow:0 30px 60px -30px rgba(11,46,36,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .primary-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{padding:12px 14px;border-radius:16px;font-size:.98rem}
  .nav-cta{margin-left:0;padding:12px 16px;border-radius:16px}
  #main-content{scroll-margin-top:88px}
}
@media (min-width:820px){
  .footer-grid{grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,.72fr))}
}
@media (max-width:560px){
  body{font-size:16.5px}
  .footer-meta{flex-direction:column;align-items:flex-start;gap:10px}
  .nav-toggle-label{display:none}
  .nav-toggle{padding:10px 13px}
}

/* ============ 可访问偏好 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none;transition:none}
  .btn:hover,.nav-link:hover,.nav-cta:hover,.slant-card:hover,.brand:hover .brand-mark{transform:none}
}