:root{
  --ink-900:#071523;
  --ink-800:#0C2136;
  --ink-700:#14324B;
  --turf-500:#21A45C;
  --turf-300:#56D68F;
  --flare-500:#FF6A2B;
  --flare-200:#FFB48A;
  --lemon-400:#F2E85C;
  --paper-50:#EDF3F7;
  --paper-90:#DCE7EE;
  --mist-400:#93A9BA;

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --radius-organic:22px 6px 22px 6px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;text-size-adjust:100%}

body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper-50);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.02;
  letter-spacing:-.01em;
  color:var(--paper-50);
}

p{margin:0}
ul,ol{margin:0;padding:0}
img{max-width:100%;display:block}
button{font-family:inherit}
address{font-style:normal}

::selection{background:var(--flare-500);color:#08111a}

:focus-visible{
  outline:2px solid var(--flare-500);
  outline-offset:3px;
  border-radius:3px;
}

/* ---------- 容器与通用排版 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.page-main{display:block;background:var(--ink-900)}
.canvas{background:var(--ink-800);border-top:1px solid var(--ink-700);border-bottom:1px solid var(--ink-700)}
.section{padding-block:clamp(36px,6vw,80px)}

.stack{display:grid;gap:clamp(16px,2vw,24px)}
.rule{height:1px;background:var(--ink-700);border:0;margin:0}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  padding-bottom:8px;
  border-bottom:1px solid var(--ink-700);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--turf-300);
}

.lede{
  max-width:34em;
  font-size:clamp(16px,1.6vw,18px);
  line-height:1.75;
  color:var(--paper-50);
}

.muted{color:var(--mist-400)}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:0;
  color:var(--lemon-400);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  background:rgba(20,50,75,.4);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist-400);
}
.tag--flare{color:var(--flare-200);border-color:rgba(255,106,43,.42)}

.grid{display:grid;gap:clamp(20px,3vw,36px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--aside{grid-template-columns:minmax(0,7fr) minmax(0,3fr)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--accent{background:var(--flare-500);color:#0a1016}
.btn--accent:hover{background:var(--flare-200);color:#0a1016}
.btn--ghost{background:transparent;border-color:var(--ink-700);color:var(--paper-50)}
.btn--ghost:hover{border-color:var(--turf-500);color:var(--turf-300)}
.btn-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

/* ---------- 面包屑 ---------- */
.crumbs{padding:14px 0;border-bottom:1px solid var(--ink-700)}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  list-style:none;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist-400);
}
.crumbs__list a{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:0 4px;
  color:var(--mist-400);
  text-decoration:none;
}
.crumbs__list a:hover{color:var(--turf-300)}
.crumbs__sep{color:rgba(147,169,186,.45)}
.crumbs__current{color:var(--lemon-400);font-weight:600}

/* ---------- 图片容器基座 ---------- */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--ink-700);
  border-radius:var(--radius-organic);
  background:
    radial-gradient(90% 80% at 15% 0%,rgba(33,164,92,.28),transparent 65%),
    linear-gradient(150deg,var(--ink-800),var(--ink-900) 62%,rgba(255,106,43,.16));
}
.media img,.media picture>img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--slant{border-radius:0;clip-path:polygon(0 0,100% 0,100% 88%,0 100%)}
.media--tall{aspect-ratio:3/4}
.media--wide{aspect-ratio:21/9}
.media__pin{
  position:absolute;
  top:12px;
  left:12px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  background:rgba(7,21,35,.74);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--turf-300);
}
.media__caption{
  position:absolute;
  inset:auto 0 0 0;
  padding:16px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper-50);
  background:linear-gradient(to top,rgba(7,21,35,.94),rgba(7,21,35,0));
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:50%;
  top:-120px;
  z-index:200;
  transform:translateX(-50%);
  padding:10px 20px;
  border-radius:0 0 10px 10px;
  background:var(--lemon-400);
  color:#0b151f;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:0;outline-offset:2px}

/* ---------- 顶部细条 ---------- */
.topbar{
  background:var(--ink-900);
  border-bottom:1px solid var(--ink-700);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist-400);
}
.topbar__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px 20px;
  min-height:36px;
  padding-block:6px;
}
.topbar__meta,.topbar__note{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
}
.topbar__meta time{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--lemon-400);
  letter-spacing:.04em;
}
.topbar__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--turf-300);
  box-shadow:0 0 0 3px rgba(86,214,143,.16);
}

/* ---------- 刊头 ---------- */
.masthead{
  position:relative;
  z-index:50;
  background:var(--ink-900);
  border-bottom:1px solid var(--ink-700);
  color:var(--paper-50);
}
.masthead::before{
  content:"";
  position:absolute;
  inset:-34% 0 auto 0;
  height:320px;
  pointer-events:none;
  background:
    radial-gradient(58% 62% at 16% 0%,rgba(33,164,92,.32),transparent 70%),
    radial-gradient(52% 58% at 84% 0%,rgba(255,106,43,.22),transparent 72%);
  animation:poolDrift 20s ease-in-out infinite alternate;
}
.masthead > *{position:relative;z-index:1}

@keyframes poolDrift{
  from{transform:translate3d(-3%,0,0) scale(1)}
  to{transform:translate3d(3%,2%,0) scale(1.05)}
}

.masthead__bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:12px;
  padding-block:18px 14px;
}
.masthead__slot{display:flex;align-items:center;gap:10px;min-width:0}
.masthead__slot--end{justify-content:flex-end}

.brand{
  display:grid;
  justify-items:center;
  gap:2px;
  padding-inline:8px;
  text-decoration:none;
  color:inherit;
}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,4.6vw,46px);
  line-height:.95;
  letter-spacing:.02em;
  color:var(--paper-50);
  transition:color .18s var(--ease);
}
.brand__sub{
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mist-400);
}
.brand:hover .brand__name{color:var(--turf-300)}

.utility-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  padding:0 16px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  background:rgba(20,50,75,.45);
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--paper-50);
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.utility-link:hover{color:var(--turf-300);border-color:var(--turf-500)}
.utility-link--accent{background:var(--flare-500);border-color:var(--flare-500);color:#0a1016}
.utility-link--accent:hover{background:var(--flare-200);border-color:var(--flare-200);color:#0a1016}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  min-height:44px;
  min-width:44px;
  padding:0 14px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  background:transparent;
  color:var(--paper-50);
  font-size:12px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{color:var(--turf-300);border-color:var(--turf-500)}
.nav-toggle__box{display:grid;gap:4px;width:16px}
.nav-toggle__box span{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.masthead[data-open] .nav-toggle__box span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.masthead[data-open] .nav-toggle__box span:nth-child(2){opacity:0}
.masthead[data-open] .nav-toggle__box span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* ---------- 轮次刻度条 ---------- */
.roundbar{
  border-top:1px solid var(--ink-700);
  border-bottom:1px solid var(--ink-700);
  background:linear-gradient(90deg,rgba(12,33,54,.92),rgba(7,21,35,.92));
}
.roundbar__inner{
  display:flex;
  gap:8px;
  padding-block:10px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  scrollbar-width:thin;
}
.roundbar__inner::-webkit-scrollbar{height:3px}
.roundbar__inner::-webkit-scrollbar-track{background:var(--ink-700)}
.roundbar__inner::-webkit-scrollbar-thumb{background:var(--turf-500);border-radius:2px}

.round-chip{
  flex:0 0 auto;
  scroll-snap-align:center;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 16px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  background:rgba(20,50,75,.35);
  color:var(--paper-50);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.round-chip::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--mist-400);
  opacity:.6;
  transition:background .18s var(--ease),opacity .18s var(--ease),box-shadow .18s var(--ease);
}
.round-chip:hover{border-color:var(--turf-500);color:var(--turf-300)}
.round-chip.is-active,.round-chip[aria-pressed="true"]{
  background:var(--turf-500);
  border-color:var(--turf-300);
  color:#04130b;
}
.round-chip.is-active::before,.round-chip[aria-pressed="true"]::before{
  background:var(--flare-500);
  opacity:1;
  box-shadow:0 0 0 3px rgba(255,106,43,.24);
}

/* ---------- 主导航 ---------- */
.nav{padding-block:10px 2px}
.nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(6px,2.2vw,30px);
  list-style:none;
}
.nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 4px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--paper-50);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:7px;
  height:2px;
  background:var(--turf-300);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease),background .18s var(--ease);
}
.nav__link:hover{color:var(--turf-300)}
.nav__link:hover::after,.nav__link:focus-visible::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--lemon-400)}
.nav__link[aria-current="page"]::after{transform:scaleX(1);height:3px;background:var(--lemon-400)}

/* ---------- 路径提示 ---------- */
.path-hint{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:6px 0 16px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist-400);
}
.path-hint__step{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 8px;
  border-radius:6px;
  color:var(--mist-400);
  text-decoration:none;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.path-hint__step:hover{color:var(--turf-300);background:rgba(20,50,75,.5)}
.path-hint__step[aria-current="step"]{color:var(--lemon-400);font-weight:600}
.path-hint__idx{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--turf-500);
}
.path-hint__step[aria-current="step"] .path-hint__idx{color:var(--flare-500)}
.path-hint__sep{color:rgba(147,169,186,.4)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink-800);
  border-top:1px solid var(--ink-700);
  color:var(--paper-50);
  padding-block:clamp(40px,6vw,72px) 28px;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:auto -12% -58% 38%;
  height:300px;
  pointer-events:none;
  background:radial-gradient(closest-side,rgba(33,164,92,.24),transparent 72%);
}
.site-footer > .shell{position:relative;z-index:1}

.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.5fr 1fr;
  gap:clamp(24px,4vw,52px);
}
.footer__brand{min-width:0}
.brand--footer{justify-items:start;padding:0}
.brand--footer .brand__name{font-size:clamp(24px,3vw,34px)}
.footer__pitch{
  margin-top:12px;
  max-width:22em;
  font-size:14px;
  line-height:1.7;
  color:var(--mist-400);
}
.footer__col{min-width:0}
.footer__title{
  display:inline-block;
  margin:0 0 14px;
  padding-bottom:8px;
  border-bottom:1px solid var(--ink-700);
  font-family:var(--font-body);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--turf-300);
}
.footer__list{list-style:none;display:grid;gap:2px}
.footer__link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:14px;
  color:var(--paper-50);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.footer__link:hover{color:var(--lemon-400)}
.footer__link[aria-current="page"]{color:var(--lemon-400)}

.footer__contact{display:grid;gap:8px}
.footer__contact-row{
  display:grid;
  grid-template-columns:40px minmax(0,1fr);
  gap:10px;
  font-size:13.5px;
  line-height:1.6;
}
.footer__k{font-size:12px;letter-spacing:.08em;color:var(--turf-300)}
.footer__v{color:var(--paper-50);word-break:break-word}
.footer__note{
  margin-top:12px;
  max-width:30em;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist-400);
}

.footer__hint{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:clamp(28px,4vw,44px);
  padding:14px 18px;
  border:1px solid var(--ink-700);
  border-left:3px solid var(--flare-500);
  background:linear-gradient(90deg,rgba(20,50,75,.6),rgba(7,21,35,.18));
  font-size:13px;
  letter-spacing:.08em;
  color:var(--paper-50);
}
.footer__hint-tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--lemon-400);
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--ink-700);
}
.footer__legal{margin:0;font-size:12px;letter-spacing:.06em;color:var(--mist-400)}
.footer__legal--dim{color:rgba(147,169,186,.72)}

/* ---------- 入场动效协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer__grid{grid-template-columns:1fr 1fr}
  .grid--split,.grid--aside{grid-template-columns:1fr}
}

@media (max-width:900px){
  .masthead__bar{grid-template-columns:1fr auto;padding-block:12px}
  .masthead__slot--start{display:none}
  .masthead__slot--end{order:2}
  .brand{order:1;justify-items:start;padding-inline:0}
  .brand__sub{letter-spacing:.16em}
  .utility-link--accent{display:none}
  .nav-toggle{display:inline-flex}

  .nav{display:none;padding-block:6px}
  .masthead[data-open] .nav{display:block;animation:navDrop .18s var(--ease)}
  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    border-top:1px solid var(--ink-700);
  }
  .nav__list > li + li{border-top:1px solid var(--ink-700)}
  .nav__link{
    width:100%;
    min-height:52px;
    padding-inline:12px;
    font-size:16px;
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{background:rgba(20,50,75,.55)}
  .nav__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;
    top:0;
    bottom:0;
    width:3px;
    background:var(--lemon-400);
  }

  .path-hint{justify-content:flex-start;padding-bottom:14px}
}

@keyframes navDrop{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}

@media (max-width:640px){
  .topbar{font-size:11px}
  .topbar__note{display:none}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column}
  .media--tall{aspect-ratio:4/5}
  .grid{gap:20px}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::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}
  .masthead::before{animation:none}
}