:root{
  --paper:#F5EFE3;
  --sand:#DFCDA9;
  --rock:#6B6A64;
  --ink:#241F1A;
  --night:#121A1C;
  --cyan:#00C8CE;
  --teal:#046B70;
  --mint:#9FD8C4;
  --silver:#C6CBCF;
  --rust:#D2542A;
  --rust-deep:#9C3418;

  --radius-lg:28px;
  --radius-md:20px;
  --radius-sm:12px;
  --pill:999px;

  --gutter:clamp(24px,5vw,72px);
  --shell-max:1240px;
  --dur:240ms;
  --ease:cubic-bezier(0.2,0.7,0.2,1);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{margin:0;padding:0;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;padding:0;min-height:100vh}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

body{
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.95;
  letter-spacing:.01em;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(36,31,26,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(36,31,26,.035) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#main-content{padding-top:clamp(92px,13vh,146px);display:block}
[data-section]{scroll-margin-top:132px}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(0,200,206,.32);color:var(--ink)}

/* ---------- 排版 ---------- */
.display{font-size:clamp(48px,7vw,104px);font-weight:900;line-height:1.05;letter-spacing:-.01em}
.h1{font-size:clamp(32px,4vw,52px);font-weight:700;line-height:1.2;letter-spacing:-.01em}
.h2{font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.005em}
.h3{font-size:20px;font-weight:700;line-height:1.45}
.lead{font-size:clamp(17px,1.35vw,20px);line-height:1.9;color:var(--rock)}
.caption{font-size:14px;line-height:1.8;color:var(--rock)}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.05em}
.accent{color:var(--teal)}
.muted{color:var(--rock)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 布局 ---------- */
.shell{width:min(var(--shell-max),calc(100% - (var(--gutter) * 2)));margin-inline:auto}
.section{padding-block:clamp(36px,5.5vw,80px)}
.blueprint{
  position:relative;
  border-radius:var(--radius-lg);
  background-color:rgba(255,255,255,.28);
  background-image:
    linear-gradient(rgba(36,31,26,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(36,31,26,.05) 1px,transparent 1px);
  background-size:44px 44px;
  border:1px solid rgba(107,106,100,.22);
  padding:clamp(20px,3vw,44px);
}
.section-head{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:clamp(16px,2vw,34px);
  align-items:start;
  padding-bottom:16px;
  border-bottom:1px solid rgba(36,31,26,.16);
  margin-bottom:clamp(22px,3vw,42px);
}
.section-num{
  font-family:var(--font-mono);
  font-size:clamp(34px,4vw,56px);
  font-weight:700;
  line-height:1;
  letter-spacing:.02em;
  color:var(--paper);
  -webkit-text-stroke:1.5px var(--silver);
  text-shadow:2px 2px 0 rgba(210,84,42,.5);
}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--rust-deep);margin-bottom:8px;
}
.section-kicker::before{content:"";width:14px;height:2px;background:var(--cyan);border-radius:2px}
.section-title{font-size:clamp(26px,3vw,40px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-desc{margin-top:10px;max-width:62ch}
.split-asym{display:grid;grid-template-columns:1fr;gap:clamp(24px,3vw,48px)}
.rail-layout{display:grid;grid-template-columns:1fr;gap:clamp(24px,3vw,48px)}
.index-rail{border-left:1px solid rgba(36,31,26,.18);padding-left:14px}
.rail-link{
  display:block;padding:6px 0;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.05em;color:var(--rock);text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.rail-link:hover{color:var(--teal);transform:translateX(3px)}
.rail-link[aria-current]{color:var(--ink);font-weight:700}
.rail-link[aria-current]::after{content:"";display:inline-block;width:6px;height:6px;margin-left:8px;border-radius:50%;background:var(--cyan);vertical-align:middle}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--pill);border:1px solid transparent;
  font-size:15px;font-weight:500;line-height:1.4;text-decoration:none;white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn-primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink);font-weight:700}
.btn-primary:hover{background:#28dde2;box-shadow:0 10px 24px -12px rgba(0,200,206,.9)}
.btn-ghost{background:transparent;border-color:rgba(36,31,26,.32);color:var(--ink)}
.btn-ghost:hover{border-color:var(--cyan);background:rgba(0,200,206,.1)}
.btn:active{transform:translateY(1px)}

/* ---------- 头部 · 悬浮胶囊 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--ink);color:var(--paper);font-size:14px;text-decoration:none;
  transform:translateY(-180%);
  transition:transform 200ms var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  padding:clamp(10px,1.5vw,18px) 0;
  pointer-events:none;
  transition:padding var(--dur) var(--ease);
}
.site-header > *{pointer-events:auto}

.header-shell{
  position:relative;
  width:min(var(--shell-max),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
  display:flex;align-items:center;
  gap:clamp(10px,1.4vw,22px);
  padding:8px 10px 8px 16px;
  background:rgba(245,239,227,.88);
  border:1px solid rgba(107,106,100,.3);
  border-radius:var(--pill);
  box-shadow:0 14px 36px -26px rgba(36,31,26,.7);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:padding var(--dur) var(--ease),background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled] .header-shell{
  padding:5px 8px 5px 12px;
  background:rgba(245,239,227,.97);
  box-shadow:0 10px 30px -22px rgba(36,31,26,.8);
}

.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto;border-radius:var(--pill)}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;flex:0 0 auto;
  border-radius:12px;background:var(--night);color:var(--cyan);
  font-size:18px;font-weight:900;line-height:1;
  box-shadow:0 0 0 1px rgba(0,200,206,.45),0 0 20px -8px rgba(0,200,206,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-line{font-size:14px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.brand-sub{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--rock);
  white-space:nowrap;max-height:18px;overflow:hidden;
  transition:opacity var(--dur) var(--ease),max-height var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.site-header[data-scrolled] .brand-sub{opacity:0;max-height:0;transform:translateY(-4px)}

.primary-nav{margin-inline-start:auto;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;align-items:center;
  padding:8px 12px;border-radius:var(--pill);
  border:1px solid transparent;text-decoration:none;
  font-size:15px;font-weight:500;letter-spacing:.02em;white-space:nowrap;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-link:hover{border-color:var(--cyan);background:rgba(0,200,206,.09)}
.nav-link[aria-current="page"]{
  color:var(--ink);
  background:rgba(0,200,206,.14);
  border-color:rgba(0,200,206,.55);
  box-shadow:inset 0 -2px 0 var(--cyan),0 0 18px -10px rgba(0,200,206,1);
}

.header-utility{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.header-cta{padding:9px 16px;font-size:14px}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--pill);
  border:1px solid rgba(36,31,26,.28);
  font-size:14px;font-weight:500;line-height:1.4;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(0,200,206,.1)}
.nav-toggle-bars{position:relative;width:16px;height:10px;border-top:2px solid currentColor;border-bottom:2px solid currentColor;transition:transform var(--dur) var(--ease)}
.site-header[data-open] .nav-toggle-bars{transform:rotate(90deg)}

.progress-rail{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(107,106,100,.18);
  opacity:0;transition:opacity var(--dur) var(--ease);
}
.site-header[data-scrolled] .progress-rail{opacity:1}
.progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--rust));
  transition:width 120ms linear;
}

/* ---------- 页脚 · 深夜机房 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,7vw,112px);
  background:var(--night);
  color:var(--silver);
  font-size:15px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(198,203,207,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(198,203,207,.07) 1px,transparent 1px);
  background-size:64px 64px;
}
.site-footer::after{
  content:"";position:absolute;top:-180px;right:-140px;width:560px;height:560px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(0,200,206,.22),transparent 68%);
}
.footer-shell{
  position:relative;z-index:1;
  width:min(var(--shell-max),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
  padding:clamp(44px,6.5vw,84px) 0 clamp(26px,3vw,40px);
}
.footer-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:24px 32px;padding-bottom:clamp(24px,3vw,36px);
  border-bottom:1px solid rgba(198,203,207,.16);
}
.footer-brand{display:flex;align-items:center;gap:14px}
.footer-brand-mark{
  display:grid;place-items:center;width:44px;height:44px;flex:0 0 auto;
  border-radius:14px;background:rgba(0,200,206,.12);
  border:1px solid rgba(0,200,206,.5);
  color:var(--cyan);font-size:20px;font-weight:900;line-height:1;
}
.footer-brand-text{display:flex;flex-direction:column;gap:2px}
.footer-brand-line{font-size:20px;font-weight:700;line-height:1.3;color:var(--paper);letter-spacing:.01em}
.footer-brand-sub{font-family:var(--font-mono);font-size:12px;letter-spacing:.07em;color:var(--rock)}
.footer-top-meta{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.footer-service{color:var(--silver);font-size:15px;line-height:1.8;max-width:36ch}
.footer-coord{color:rgba(198,203,207,.6);font-size:12px;letter-spacing:.12em}

.footer-grid{
  display:grid;grid-template-columns:1fr;gap:clamp(22px,3vw,40px);
  padding-top:clamp(26px,3vw,42px);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}
.footer-links{display:flex;flex-direction:column;gap:2px}
.footer-link{
  display:inline-block;padding:4px 0;
  font-size:15px;line-height:1.6;color:var(--silver);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:#fff;border-bottom-color:var(--cyan)}

.footer-contact{
  display:grid;grid-template-columns:1fr;gap:18px 24px;
  margin-top:clamp(26px,3vw,42px);padding-top:clamp(24px,3vw,36px);
  border-top:1px solid rgba(198,203,207,.16);
}
.footer-contact-item{display:flex;flex-direction:column;gap:6px;min-width:0}
.footer-contact-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan);
}
.footer-contact-value{color:var(--silver);font-size:15px;line-height:1.75;overflow-wrap:anywhere}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 28px;
  margin-top:clamp(26px,3vw,40px);padding-top:20px;
  border-top:1px solid rgba(198,203,207,.16);
  font-size:13px;line-height:1.8;color:rgba(198,203,207,.75);
}
.footer-legal{color:var(--silver)}
.footer-note{flex:1 1 320px;max-width:66ch}
.footer-year{color:rgba(198,203,207,.75);margin-inline-start:auto}

/* ---------- 卡片 / 标签 / 图例 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2vw,28px);
  border-radius:var(--radius-md);
  border:1px solid rgba(36,31,26,.14);
  background:rgba(255,255,255,.5);
  box-shadow:0 2px 0 rgba(36,31,26,.03),0 18px 34px -30px rgba(36,31,26,.9);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(0,200,206,.5);box-shadow:0 20px 40px -30px rgba(0,200,206,.9)}
.card--mint{
  background:linear-gradient(155deg,rgba(159,216,196,.62),rgba(159,216,196,.22));
  border-color:rgba(4,107,112,.3);
}
.card--dark{
  background:linear-gradient(160deg,rgba(18,26,28,.98),rgba(4,107,112,.42));
  border-color:rgba(198,203,207,.2);
  color:var(--silver);
}
.card-title{font-size:20px;font-weight:700;line-height:1.45;margin-bottom:8px}
.card-text{font-size:15px;line-height:1.85;color:var(--rock)}
.card--dark .card-text{color:var(--silver)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  border:1px solid rgba(36,31,26,.14);
  background:rgba(36,31,26,.06);color:var(--ink);
}
.tag--mint{background:rgba(159,216,196,.55);border-color:rgba(4,107,112,.32)}
.tag--cyan{background:rgba(0,200,206,.18);border-color:rgba(0,200,206,.55);color:#0A5A5D}
.tag--rust{background:rgba(210,84,42,.14);border-color:rgba(210,84,42,.42);color:var(--rust-deep)}

.legend{display:flex;flex-wrap:wrap;gap:10px 20px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--rock)}
.legend-item{display:inline-flex;align-items:center;gap:8px}
.legend-swatch{width:12px;height:12px;border-radius:3px;background:var(--cyan);border:1px solid rgba(36,31,26,.24);flex:0 0 auto}
.legend-swatch--mint{background:var(--mint)}
.legend-swatch--rust{background:var(--rust)}
.legend-swatch--silver{background:var(--silver)}
.legend-label{line-height:1.6}

/* ---------- 三步切换 ---------- */
.capsule-tabs{display:block}
.capsule-tabs-list{
  display:flex;flex-wrap:wrap;gap:6px;width:fit-content;max-width:100%;
  padding:6px;border-radius:var(--pill);
  background:rgba(36,31,26,.07);
  border:1px solid rgba(36,31,26,.1);
  overflow-x:auto;
}
.capsule-tab{
  padding:9px 18px;border-radius:var(--pill);border:1px solid transparent;
  font-size:15px;font-weight:500;color:var(--rock);white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.capsule-tab:hover{color:var(--ink);background:rgba(245,239,227,.7)}
.capsule-tab[aria-selected="true"]{
  background:var(--paper);color:var(--ink);border-color:var(--cyan);
  box-shadow:inset 0 -2px 0 var(--cyan),0 8px 20px -16px rgba(0,200,206,1);
}
.tab-panel{
  margin-top:22px;
  padding:clamp(18px,2.4vw,32px);
  border-radius:var(--radius-lg);
  background:linear-gradient(150deg,rgba(18,26,28,.98),rgba(4,107,112,.45));
  border:1px solid rgba(198,203,207,.18);
  color:var(--silver);
  animation:panel-in var(--dur) var(--ease);
}
.tab-panel--light{
  background:rgba(255,255,255,.55);
  border-color:rgba(36,31,26,.14);
  color:var(--ink);
}
@keyframes panel-in{from{opacity:0;transform:translateX(32px)}to{opacity:1;transform:none}}

/* ---------- 折叠矩阵 ---------- */
.matrix{border-top:1px solid rgba(36,31,26,.16)}
.matrix-item{border-bottom:1px solid rgba(36,31,26,.16)}
.matrix-summary{
  display:flex;align-items:center;gap:14px;
  padding:16px 4px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:500;line-height:1.6;
  transition:color var(--dur) var(--ease);
}
.matrix-summary::-webkit-details-marker{display:none}
.matrix-summary::after{
  content:"+";margin-inline-start:auto;
  font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--rust);
  transition:transform var(--dur) var(--ease);
}
.matrix-summary:hover{color:var(--teal)}
.matrix-item[open] > .matrix-summary::after{transform:rotate(45deg)}
.matrix-body{padding:0 4px 22px;font-size:15px;line-height:1.9;color:var(--rock)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16/10;width:100%;
  border-radius:var(--radius-lg);
  border:1px solid rgba(36,31,26,.14);
  background:linear-gradient(140deg,rgba(223,205,169,.72),rgba(198,203,207,.5) 60%,rgba(0,200,206,.16));
}
.media-frame::before{
  content:"";position:absolute;inset:14px;pointer-events:none;
  border:1px dashed rgba(36,31,26,.2);
  border-radius:calc(var(--radius-lg) - 12px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame-caption{
  margin-top:10px;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.05em;color:var(--rock);
}

/* ---------- 提示 / 下一步 / 面包屑 / 数据 ---------- */
.notice{
  display:flex;flex-wrap:wrap;gap:8px 14px;
  padding:16px 20px;border-radius:var(--radius-md);
  border:1px solid rgba(210,84,42,.35);
  border-inline-start:4px solid var(--rust);
  background:rgba(210,84,42,.07);
  font-size:15px;line-height:1.85;
}
.notice-title{font-weight:700;color:var(--rust-deep)}

.next-step{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  margin-top:clamp(36px,5vw,64px);
  padding:clamp(18px,2.5vw,28px);
  border-radius:var(--radius-lg);
  background:var(--sand);
  border:1px solid rgba(36,31,26,.16);
}
.next-step-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--rust-deep)}
.next-step-title{font-size:20px;font-weight:700;line-height:1.45}
.next-step-link{
  margin-inline-start:auto;display:inline-flex;align-items:center;gap:8px;
  font-weight:700;color:var(--teal);text-decoration:none;
  border-bottom:2px solid var(--cyan);padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.next-step-link:hover{color:var(--ink);border-color:var(--rust)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;gap:8px;
  padding-block:14px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.05em;color:var(--rock);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:rgba(107,106,100,.6)}
.breadcrumb-item a{color:var(--teal);text-decoration:none}
.breadcrumb-item a:hover{text-decoration:underline}

.count-chip{
  display:inline-flex;align-items:center;justify-content:center;min-width:26px;
  padding:2px 8px;border-radius:var(--pill);
  background:rgba(0,200,206,.16);border:1px solid rgba(0,200,206,.5);
  font-family:var(--font-mono);font-size:12px;color:#0A5A5D;
}
.stat-figure{font-family:var(--font-mono);font-size:clamp(28px,3.4vw,44px);font-weight:700;line-height:1.1;letter-spacing:-.01em;color:var(--ink)}
.stat-label{margin-top:6px;font-size:14px;color:var(--rock)}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-inline-start:28px}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(var(--cyan),rgba(0,200,206,.08));
}
.timeline-node{position:relative;padding-bottom:clamp(18px,2.6vw,32px)}
.timeline-dot{
  position:absolute;left:-28px;top:8px;width:15px;height:15px;border-radius:50%;
  background:var(--paper);border:2px solid var(--cyan);
}
.timeline-time{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--rust-deep)}

/* ---------- 显现动效 ---------- */
html.js-ready [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:720px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .site-nav-toggle-desktop-hidden{display:none}
  .header-shell{margin-inline:auto clamp(14px,4vw,64px)}
  .nav-toggle{display:none}
}
@media (min-width:960px){
  .split-asym{grid-template-columns:5fr 7fr}
  .footer-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (min-width:1080px){
  .rail-layout{grid-template-columns:200px minmax(0,1fr)}
  .index-rail{position:sticky;top:124px;align-self:start}
  .footer-contact{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (max-width:899px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:none;
    padding:12px;
    background:rgba(245,239,227,.99);
    border:1px solid rgba(107,106,100,.32);
    border-radius:24px;
    box-shadow:0 26px 48px -30px rgba(36,31,26,.85);
  }
  .site-header[data-open] .primary-nav{display:block;animation:nav-drop 200ms var(--ease)}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{width:100%;justify-content:flex-start;padding:11px 14px;border-radius:16px;font-size:16px}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--cyan)}
}
@keyframes nav-drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media (max-width:560px){
  .brand-text{display:none}
  .nav-toggle-label{display:none}
  .header-shell{padding:8px 8px 8px 10px}
  .header-cta{padding:9px 13px;font-size:13px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-year{margin-inline-start:0}
}
@media (max-width:400px){
  .header-cta{display:none}
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:120ms !important;
  }
  html.js-ready [data-reveal]{transform:none}
  .progress-bar{transition:none}
}