:root{
  --ink:#0B1F33;
  --ink-deep:#071521;
  --ink-soft:#122A41;
  --cream:#F4F1EA;
  --paper:#FBFAF6;
  --text:#1E2A36;
  --slate:#2E3A46;
  --mist:#8A97A3;
  --signal:#FF6B2C;
  --signal-deep:#D9521A;
  --celadon:#2F6F5E;
  --celadon-pale:#DCEBE5;
  --clay:#B86B4B;
  --moss:#6B7F5A;
  --line-ink:rgba(11,31,51,.14);
  --line-ink-strong:rgba(11,31,51,.28);
  --line-light:rgba(244,241,234,.14);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --w-max:1280px;
  --gutter:clamp(18px,4vw,56px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--text);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg,video{max-width:100%;height:auto;display:block;}
figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;}
button{font:inherit;color:inherit;}
table{border-collapse:collapse;width:100%;}

h1,h2,h3,h4{
  margin:0;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.06;
  color:var(--ink);
}
h1{font-size:clamp(40px,6vw,88px);line-height:1.02;}
h2{font-size:clamp(28px,4vw,48px);line-height:1.08;}
h3{font-size:clamp(19px,2vw,23px);line-height:1.3;letter-spacing:-.01em;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}

a{color:inherit;}
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:2px;
  border-radius:1px;
}

.num{
  font-family:var(--font-mono);
  font-feature-settings:"tnum" 1;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:1200;
  transform:translateY(-160%);
  background:var(--signal);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  padding:12px 20px;
  text-decoration:none;
  border-radius:var(--radius);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 共享容器 ---------- */
.container{
  width:100%;
  max-width:var(--w-max);
  margin:0 auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:760px;}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}

.section{padding-block:clamp(40px,6vw,84px);}
.section__head{
  display:grid;
  gap:10px;
  margin-bottom:clamp(20px,3vw,36px);
  max-width:70ch;
}

.eyebrow{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--celadon);
}
.eyebrow--light{color:rgba(244,241,234,.62);}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--line-ink);
}
.rule--light{background:var(--line-light);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),transform .12s var(--ease);
}
.btn--primary{
  background:var(--signal);
  border-color:var(--signal);
  color:var(--ink);
}
.btn--primary:hover{background:#FF8347;border-color:#FF8347;}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{
  background:transparent;
  border-color:var(--line-ink-strong);
  color:var(--ink);
}
.btn--ghost:hover{border-color:var(--signal);color:var(--signal-deep);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:8px 14px;font-size:13px;}

/* ---------- 标记 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.1em;
  line-height:1.5;
  border:1px solid currentColor;
  border-radius:1px;
}
.tag--celadon{color:var(--celadon);background:var(--celadon-pale);border-color:rgba(47,111,94,.35);}
.tag--clay{color:var(--clay);background:rgba(184,107,75,.09);border-color:rgba(184,107,75,.4);}
.tag--signal{color:var(--signal-deep);background:rgba(255,107,44,.1);border-color:rgba(255,107,44,.45);}

.dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  display:inline-block;
  border-radius:50%;
  background:var(--mist);
}
.dot--live{background:var(--celadon-pale);box-shadow:0 0 0 3px rgba(220,235,229,.16);}
.dot--celadon{background:var(--celadon);}
.dot--clay{background:var(--clay);}

/* ---------- 面板 ---------- */
.panel{
  background:var(--paper);
  border:1px solid var(--line-ink);
  border-radius:var(--radius);
  padding:clamp(20px,3vw,32px);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  padding-block:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.breadcrumb__list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:rgba(11,31,51,.26);
  margin-right:2px;
}
.breadcrumb a{
  color:var(--slate);
  text-decoration:none;
  border-bottom:1px solid var(--line-ink-strong);
}
.breadcrumb a:hover{color:var(--signal-deep);border-color:var(--signal);}
.breadcrumb__item[aria-current="page"]{color:var(--text);}

/* ---------- 正文 ---------- */
.prose{
  max-width:72ch;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
}
.prose h2{margin:1.8em 0 .6em;font-size:clamp(24px,3vw,34px);}
.prose h3{margin:1.5em 0 .5em;}
.prose p{margin:0 0 1.1em;}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.2em;}
.prose li{margin-bottom:.4em;}
.prose a{
  color:var(--celadon);
  text-decoration:none;
  border-bottom:1px solid rgba(47,111,94,.4);
}
.prose a:hover{color:var(--signal-deep);border-color:var(--signal);}
.prose strong{font-weight:700;color:var(--ink);}

.meta-list{
  list-style:none;
  display:grid;
  gap:12px;
  margin:0;
  padding:0;
  font-size:14px;
  line-height:1.8;
  color:var(--slate);
}
.meta-list li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:10px;
  align-items:baseline;
}

/* ---------- 图片容器基础 ---------- */
.figure{margin:0;position:relative;}
.figure__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-soft);
  border:1px solid var(--line-ink);
  border-radius:var(--radius);
}
.figure__frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.figure__frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(244,241,234,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,241,234,.08) 1px,transparent 1px);
  background-size:34px 34px;
}
.figure--wide .figure__frame{aspect-ratio:21/9;}
.figure--tall .figure__frame{aspect-ratio:4/5;}
.figure--square .figure__frame{aspect-ratio:1/1;}
.figure__caption{
  margin-top:10px;
  padding-left:10px;
  border-left:2px solid var(--celadon);
  font-size:13px;
  line-height:1.7;
  color:var(--slate);
}

/* ---------- 页头 ---------- */
.site-header{
  position:relative;
  z-index:20;
  background:var(--ink);
  color:var(--cream);
}

.masthead-bar{
  background:var(--ink-deep);
  border-bottom:1px solid var(--line-light);
  font-size:12px;
  letter-spacing:.06em;
}
.masthead-bar__inner{
  max-width:var(--w-max);
  margin:0 auto;
  padding:8px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.masthead-bar__status{
  margin:0;
  display:flex;
  align-items:center;
  gap:8px;
  color:rgba(244,241,234,.7);
  white-space:nowrap;
}
.masthead-bar__status b{
  color:var(--cream);
  font-weight:600;
  margin-left:2px;
}
.masthead-bar__meta{
  margin:0;
  display:flex;
  align-items:center;
  gap:12px;
  color:rgba(244,241,234,.5);
  white-space:nowrap;
}
.masthead-bar__sep{
  display:inline-block;
  width:1px;
  height:11px;
  background:rgba(244,241,234,.24);
}

.masthead{
  background:var(--ink);
  border-bottom:1px solid var(--line-light);
}
.masthead__inner{
  max-width:var(--w-max);
  margin:0 auto;
  padding:clamp(16px,2.6vw,28px) var(--gutter);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"note brand cta";
  align-items:center;
  column-gap:clamp(16px,3vw,40px);
}
.masthead__note{
  grid-area:note;
  justify-self:start;
  margin:0;
  max-width:20ch;
  font-size:13px;
  line-height:1.7;
  color:rgba(244,241,234,.58);
}
.masthead__brand{
  grid-area:brand;
  justify-self:center;
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--cream);
}
.masthead__mark{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--signal);
  border:1px solid rgba(255,107,44,.55);
  padding:4px 7px;
  line-height:1;
}
.masthead__name{
  display:block;
  font-size:clamp(26px,3.6vw,42px);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1;
  color:var(--cream);
}
.masthead__edition{
  display:block;
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.18em;
  color:rgba(244,241,234,.5);
}
.masthead__cta{
  grid-area:cta;
  justify-self:end;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  background:transparent;
  border:1px solid rgba(244,241,234,.32);
  border-radius:var(--radius);
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--signal);color:var(--signal);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:background-color .18s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .18s var(--ease),top .18s 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{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);}
.nav-toggle__label{white-space:nowrap;}

.site-nav{
  display:block;
  background:var(--cream);
  border-bottom:1px solid var(--line-ink-strong);
}
.site-nav__list{
  list-style:none;
  margin:0 auto;
  padding:0 var(--gutter);
  max-width:var(--w-max);
  display:grid;
  grid-template-columns:repeat(6,minmax(0,1fr));
}
.site-nav__item{
  border-right:1px solid var(--line-ink);
}
.site-nav__item:first-child{border-left:1px solid var(--line-ink);}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:9px;
  padding:14px 12px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--ink);
  text-decoration:none;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.site-nav__num{
  font-size:11px;
  font-weight:500;
  color:var(--mist);
  transition:color .16s var(--ease);
}
.site-nav__link:hover{background:var(--celadon-pale);color:var(--celadon);}
.site-nav__link:hover .site-nav__num{color:var(--celadon);}
.site-nav__link[aria-current="page"]{
  background:var(--ink);
  color:var(--cream);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--signal);}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:var(--signal);
}
.site-nav__foot{
  display:none;
  margin:0;
  padding:14px var(--gutter) 16px;
  border-top:1px solid var(--line-ink);
  font-size:12.5px;
  line-height:1.7;
  color:var(--slate);
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,104px);
  background:var(--ink);
  color:var(--cream);
}
.site-footer__stripe{
  height:3px;
  background:repeating-linear-gradient(90deg,var(--signal) 0 22px,transparent 22px 32px);
}
.site-footer__top{border-bottom:1px solid var(--line-light);}
.site-footer__lead{padding-block:clamp(28px,4vw,46px);}
.site-footer__eyebrow{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--signal);
}
.site-footer__tagline{
  margin:0;
  max-width:22ch;
  font-size:clamp(23px,3.2vw,38px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--cream);
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.35fr;
  gap:clamp(24px,4vw,48px);
  padding-block:clamp(30px,4.6vw,56px);
}
.site-footer__col{min-width:0;}
.site-footer__col--brand{max-width:38ch;}
.site-footer__brand{
  display:inline-block;
  font-size:20px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--cream);
  text-decoration:none;
  transition:color .16s var(--ease);
}
.site-footer__brand:hover{color:var(--signal);}
.site-footer__series{
  margin:8px 0 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:rgba(244,241,234,.5);
}
.site-footer__note{
  margin:14px 0 0;
  font-size:13px;
  line-height:1.85;
  color:rgba(244,241,234,.6);
}
.site-footer__title{
  margin:0 0 14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-light);
  font-family:var(--font-sans);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:rgba(244,241,234,.55);
}
.site-footer__links{
  list-style:none;
  display:grid;
  gap:9px;
  margin:0;
  padding:0;
}
.site-footer__links a{
  display:inline-block;
  font-size:14px;
  color:rgba(244,241,234,.82);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.site-footer__links a:hover{color:var(--signal);border-bottom-color:var(--signal);}
.site-footer__contact{
  display:grid;
  gap:12px;
  margin:0;
  font-size:13.5px;
  line-height:1.7;
  color:rgba(244,241,234,.78);
}
.site-footer__contact-row{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:10px;
  align-items:baseline;
}
.site-footer__contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:rgba(244,241,234,.42);
}
.site-footer__contact-val{
  color:rgba(244,241,234,.86);
  word-break:break-word;
}
.site-footer__legal{
  background:var(--ink-deep);
  border-top:1px solid var(--line-light);
}
.site-footer__legal-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-block:18px;
  font-size:12px;
  color:rgba(244,241,234,.48);
}
.site-footer__copy{margin:0;}
.site-footer__legal-links{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin:0;
  padding:0;
}
.site-footer__legal-links a{
  color:rgba(244,241,234,.66);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.site-footer__legal-links a:hover{color:var(--signal);border-bottom-color:var(--signal);}
.site-footer__icp{
  margin:0 0 0 auto;
  font-family:var(--font-mono);
  letter-spacing:.04em;
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:var(--signal);
  pointer-events:none;
  z-index:1100;
}

/* ---------- 显现 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 平板 ---------- */
@media (max-width:1024px){
  .site-footer__grid{grid-template-columns:1.3fr 1fr 1fr;}
  .site-footer__col--brand{grid-column:1 / -1;max-width:52ch;}
}

@media (max-width:900px){
  .masthead__inner{
    grid-template-columns:1fr auto;
    grid-template-areas:"brand toggle" "cta cta";
    row-gap:14px;
  }
  .masthead__note{display:none;}
  .masthead__brand{justify-self:start;}
  .masthead__cta{justify-self:stretch;}
  .nav-toggle{display:inline-flex;justify-self:end;grid-area:toggle;}

  .site-nav{display:none;}
  .site-nav[data-open="true"]{display:block;}
  .site-nav__list{grid-template-columns:1fr;padding:0;}
  .site-nav__item{border-right:0;border-left:0;border-top:1px solid var(--line-ink);}
  .site-nav__item:first-child{border-left:0;border-top:0;}
  .site-nav__link{padding:15px var(--gutter);}
  .site-nav__link[aria-current="page"]::after{
    top:0;
    bottom:0;
    left:0;
    right:auto;
    width:4px;
    height:auto;
  }
  .site-nav__foot{display:block;}

  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr));}
}

/* ---------- 手机 ---------- */
@media (max-width:640px){
  .masthead-bar__meta{display:none;}
  .masthead-bar__inner{justify-content:flex-start;}
  .masthead__mark{font-size:11px;padding:3px 6px;}
  .masthead__name{font-size:26px;}
  .masthead__edition{font-size:10px;letter-spacing:.14em;}
  .site-footer__grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .site-footer__col--brand{grid-column:auto;}
  .site-footer__icp{margin-left:0;flex-basis:100%;}
  .site-footer__tagline{max-width:none;}
  .prose{font-size:16px;}
  .figure--tall .figure__frame{aspect-ratio:3/4;}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .has-reveal [data-reveal],
  .has-reveal [data-reveal].is-visible{
    opacity:1;
    transform:none;
  }
  .skip-link{transition:none;}
}