/* 五区指北 —— 近黑 / 骨白 / 橙红，底部胶囊条 + 视差叙事 */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:#0E0E10;
  color:#F2EFE6;
  font-family:"Public Sans",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.72;
  padding-bottom:104px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.75;
  background:
    linear-gradient(rgba(242,239,230,.035) 1px,transparent 1px) 0 0/100% 68px,
    linear-gradient(90deg,rgba(242,239,230,.035) 1px,transparent 1px) 0 0/68px 100%;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(125% 80% at 50% 0%,rgba(255,77,46,.12),transparent 62%);
}
a{color:#FF4D2E}
a:focus-visible{outline:2px solid #FF4D2E;outline-offset:3px}
h1,h2,h3{font-family:"Lexend Mega","Public Sans",system-ui,sans-serif;font-weight:800;letter-spacing:-.02em}
figure{margin:0}

/* 底部固定胶囊条 */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:rgba(14,14,16,.93);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid rgba(242,239,230,.2);
  padding:10px 12px calc(10px + env(safe-area-inset-bottom,0px));
}
.dock-nav{
  display:flex;align-items:center;justify-content:center;gap:6px;
  max-width:1200px;margin:0 auto;
}
.dock-set{display:flex;align-items:center;gap:6px;margin:0;padding:0}
.dock-nav a{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:9px 13px;
  font-size:13px;line-height:1.2;letter-spacing:.02em;
  color:#F2EFE6;text-decoration:none;white-space:nowrap;
  border:1px solid rgba(242,239,230,.34);border-radius:999px;
  background:transparent;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.dock-nav a:hover{background:#FF4D2E;border-color:#FF4D2E;color:#0E0E10;transform:translateY(-2px)}
.dock-nav a[aria-current="true"]{border-color:#FF4D2E;color:#FF4D2E}
.dock-nav a[aria-current="true"]:hover{color:#0E0E10}
.dock-brand{
  font-family:"Lexend Mega",sans-serif;font-size:14px;font-weight:800;letter-spacing:.04em;
  color:#0E0E10;background:#FF4D2E;border:1px solid #FF4D2E;border-radius:999px;
  padding:9px 18px;min-height:40px;display:inline-flex;align-items:center;
  text-decoration:none;white-space:nowrap;margin:0 4px;
}
.dock-brand:hover{background:#F2EFE6;border-color:#F2EFE6;color:#0E0E10}

/* 首屏 */
.hero{
  position:relative;z-index:1;overflow:hidden;
  min-height:70vh;max-width:1200px;margin:0 auto;
  display:flex;flex-direction:column;justify-content:center;gap:28px;
  padding:clamp(70px,14vh,150px) clamp(18px,5vw,56px) clamp(48px,9vh,90px);
}
.hero-glyph{
  position:absolute;right:-.05em;bottom:-.14em;z-index:0;
  font-family:"Lexend Mega",sans-serif;font-weight:900;
  font-size:clamp(180px,36vw,440px);line-height:.78;
  color:transparent;-webkit-text-stroke:2px rgba(255,77,46,.5);
  pointer-events:none;user-select:none;
}
.hero-title{
  position:relative;z-index:2;margin:0;max-width:16ch;
  font-size:clamp(1.95rem,7.2vw,6.2rem);line-height:1.02;
}
.hero-hint{
  position:relative;z-index:2;margin:0;
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;letter-spacing:.32em;color:#FF4D2E;
}
.hero-hint::before{content:"";width:46px;height:1px;background:#FF4D2E;display:block}

/* 主体：左栏 + 正文 */
.deck{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(200px,242px) minmax(0,1fr);
  gap:clamp(24px,5vw,64px);align-items:start;
  max-width:1200px;margin:0 auto;
  padding:clamp(44px,7vw,88px) clamp(18px,5vw,56px) 0;
}
.rail{
  position:sticky;top:26px;
  border:1px solid rgba(242,239,230,.24);
  padding:20px 16px 8px;
}
.rail-h{
  margin:0 0 10px;font-size:15px;line-height:1.3;letter-spacing:.08em;
}
.subtitle{
  margin:0 0 18px;padding-left:12px;border-left:2px solid #FF4D2E;
  font-size:15px;line-height:1.68;color:rgba(242,239,230,.68);
}
.rail-list{list-style:none;margin:0;padding:0;counter-reset:rail}
.rail-list li{counter-increment:rail;border-top:1px solid rgba(242,239,230,.14)}
.rail-list li:first-child{border-top:0}
.rail-list a{
  display:flex;align-items:center;gap:10px;min-height:42px;padding:8px 2px;
  font-size:15px;color:#F2EFE6;text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);
  font-family:"Lexend Mega",sans-serif;font-size:11px;letter-spacing:.1em;color:#FF4D2E;
}
.rail-list a:hover{color:#FF4D2E;transform:translateX(3px)}
.rail-list a[aria-current="true"]{color:#FF4D2E}

/* 正文流 */
.stream{min-width:0;padding-bottom:8px}
.stream > div{
  padding:clamp(38px,6vw,76px) 0;
  border-top:1px solid rgba(242,239,230,.16);
}
.stream > div:first-child{border-top:0;padding-top:0}
.stream h2{
  margin:0 0 18px;font-size:clamp(1.6rem,4vw,2.6rem);line-height:1.12;
}
.stream h3{
  margin:34px 0 12px;font-size:clamp(1.14rem,2.2vw,1.42rem);line-height:1.3;color:#FF4D2E;
}
.stream p{margin:0 0 1.05em;max-width:68ch}
.stream ul,.stream ol{margin:0 0 1.2em;padding-left:1.25em;max-width:66ch}
.stream li{margin:0 0 .5em}
.stream a{color:#FF4D2E;text-underline-offset:3px}
.stream strong{color:#FF4D2E;font-weight:700}
.stream blockquote{
  margin:26px 0;padding:6px 0 6px 18px;border-left:3px solid #FF4D2E;
  color:rgba(242,239,230,.78);
}
.stream img{display:block;max-width:100%;height:auto;border:1px solid rgba(242,239,230,.2)}
.stream figure{margin:26px 0}
.stream figcaption{font-size:14px;color:rgba(242,239,230,.6);margin-top:8px}
.stream table{
  display:block;width:100%;max-width:100%;overflow-x:auto;
  border-collapse:collapse;margin:24px 0;font-size:16px;
}
.stream th,.stream td{border:1px solid rgba(242,239,230,.2);padding:9px 12px;text-align:left}
.stream th{background:rgba(255,77,46,.14)}
.stream hr{border:0;border-top:1px solid rgba(242,239,230,.18);margin:34px 0}

/* 页脚 */
.foot{
  position:relative;z-index:1;
  max-width:1200px;margin:clamp(52px,9vw,104px) auto 0;
  padding:clamp(34px,6vw,62px) clamp(18px,5vw,56px) 36px;
  border-top:1px solid rgba(242,239,230,.22);
}
.foot-mark{
  margin:0 0 30px;font-family:"Lexend Mega",sans-serif;font-weight:900;
  font-size:clamp(2.1rem,11vw,5.4rem);line-height:.92;letter-spacing:-.045em;
}
.foot-cols{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;
  padding-top:22px;border-top:1px solid rgba(242,239,230,.16);
}
.foot-cols dl{margin:0}
.foot-cols dt{
  font-size:13px;letter-spacing:.16em;color:rgba(242,239,230,.55);margin-bottom:6px;
}
.foot-cols dd{margin:0}
.foot-cols dd a{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:15px;color:#F2EFE6;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.foot-cols dd a:hover{color:#FF4D2E;border-color:#FF4D2E}
.foot-copy{
  margin:26px 0 0;padding-top:16px;border-top:1px solid rgba(242,239,230,.16);
  font-size:13px;letter-spacing:.14em;color:rgba(242,239,230,.5);
}

/* 滚动显现 */
html.reveal-ready .stream > div,
html.reveal-ready .rail,
html.reveal-ready .foot-cols{
  opacity:0;transform:translate3d(0,26px,0);
  transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1);
}
html.reveal-ready .stream > div.in,
html.reveal-ready .rail.in,
html.reveal-ready .foot-cols.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.reveal-ready .stream > div,
  html.reveal-ready .rail,
  html.reveal-ready .foot-cols{opacity:1;transform:none;transition:none}
  .dock-nav a,.rail-list a{transition:none}
}

/* 移动端 */
@media (max-width:900px){
  body{padding-bottom:158px}
  .dock{padding:8px 10px calc(8px + env(safe-area-inset-bottom,0px))}
  .dock-nav{flex-wrap:wrap;gap:6px 5px;justify-content:center}
  .dock-brand{
    order:-1;flex:0 0 100%;justify-content:center;
    margin:0 0 2px;padding:4px 12px;min-height:26px;font-size:12px;
  }
  .dock-set{flex-wrap:wrap;justify-content:center;gap:5px}
  .dock-nav a{font-size:12px;padding:9px 10px;min-height:40px}
  .hero{min-height:62vh;padding-top:56px}
  .hero-title{max-width:100%}
  .deck{grid-template-columns:1fr;gap:30px;padding-top:34px}
  .rail{position:static;padding:16px 14px 6px}
  .rail-list{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
  .rail-list a{font-size:14px}
  .foot-cols{gap:12px}
  .foot-cols dd a{font-size:14px}
}
@media (max-width:420px){
  .foot-cols{grid-template-columns:1fr 1fr}
  .foot-cols dl:last-child{grid-column:1 / -1}
}

button[aria-expanded]{min-width:44px;min-height:44px}