*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}

:root{
  --indigo:#14203A;
  --night:#0B1426;
  --cream:#F4EBDD;
  --cream-deep:#E9DECB;
  --sand:#D9A45B;
  --poplar:#E06B35;
  --mint:#24F0C8;
  --stone:#6E6A63;
  --moss:#5E6B4F;
  --clay:#B65C46;
  --ink:#11161C;
  --line:rgba(110,106,99,.28);
  --line-soft:rgba(110,106,99,.16);
  --line-dark:rgba(244,235,221,.16);
  --font-display:"Barlow Condensed","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --wrap:1240px;
  --gutter:clamp(16px,3.2vw,40px);
  --step:clamp(48px,7vw,96px);
}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--cream);
  background-image:linear-gradient(180deg,rgba(217,164,91,.06),transparent 480px);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3{font-family:var(--font-display);font-weight:800;line-height:1.15;letter-spacing:.01em}
h1{font-size:clamp(2.1rem,5vw,3.4rem)}
h2{font-size:clamp(1.45rem,2.6vw,2.05rem)}
h3{font-size:1.1rem;line-height:1.4}
strong{font-weight:700}
small{font-size:12px}

:focus-visible{outline:2px solid var(--mint);outline-offset:3px}

.skip-link{position:absolute;left:-9999px;top:0;z-index:200;padding:12px 20px;background:var(--mint);color:var(--night);font-family:var(--font-mono);font-size:12px;letter-spacing:.14em}
.skip-link:focus{left:12px;top:12px}

/* ============ 头部 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  color:var(--cream);
  background:linear-gradient(180deg,rgba(11,20,38,.94) 0%,rgba(11,20,38,.72) 58%,rgba(11,20,38,0) 100%);
  transition:background-color .28s ease,box-shadow .28s ease;
}
.site-header[data-scrolled="true"]{
  background:var(--indigo);
  box-shadow:0 1px 0 var(--line-dark),0 22px 40px -34px #000;
}

.header-rail{
  display:flex;
  align-items:center;
  gap:clamp(10px,2.4vw,28px);
  padding:7px max(var(--gutter),calc((100% - var(--wrap)) / 2 + var(--gutter)));
  background:rgba(11,20,38,.88);
  border-bottom:1px solid rgba(244,235,221,.09);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(244,235,221,.6);
  overflow:hidden;
  white-space:nowrap;
}
.header-rail__status{display:inline-flex;align-items:center;gap:8px;color:var(--mint);flex:0 0 auto}
.header-rail__track{margin-left:auto;color:var(--sand);overflow:hidden;text-overflow:ellipsis;max-width:40%}
.header-rail__note{flex:0 0 auto;color:rgba(244,235,221,.42)}

.pulse-dot{
  display:inline-block;width:6px;height:6px;background:var(--mint);
  box-shadow:0 0 0 0 rgba(36,240,200,.55);
  animation:status-pulse 6s ease-out infinite;
}
@keyframes status-pulse{
  0%,88%{box-shadow:0 0 0 0 rgba(36,240,200,.55)}
  94%{box-shadow:0 0 0 7px rgba(36,240,200,0)}
  100%{box-shadow:0 0 0 0 rgba(36,240,200,0)}
}

.header-bar{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.2vw,32px);
  padding:14px max(var(--gutter),calc((100% - var(--wrap)) / 2 + var(--gutter)));
}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;
  width:38px;height:38px;
  background:linear-gradient(140deg,var(--poplar),var(--sand));
  color:var(--night);
  font-family:var(--font-mono);
  font-size:16px;
  font-weight:700;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__name{font-family:var(--font-display);font-size:20px;font-weight:800;letter-spacing:.06em}
.brand__sub{font-family:var(--font-mono);font-size:9px;letter-spacing:.2em;color:rgba(244,235,221,.55)}

.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(14px,1.8vw,26px)}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:14px;
  letter-spacing:.03em;
  color:rgba(244,235,221,.76);
  transition:color .2s ease;
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--mint);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s ease;
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--cream)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--sand);font-weight:600}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--sand)}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--cream);
  background:transparent;
  border:1px solid transparent;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--mint),0 0 0 2px rgba(36,240,200,.32)}
.btn--cta{background:var(--poplar);color:#fff}
.btn--cta:hover,.btn--cta:focus-visible{background:var(--sand);color:var(--night)}
.btn--ghost{border-color:rgba(244,235,221,.4);color:var(--cream)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--mint);color:var(--mint)}

.nav-toggle{
  display:none;
  position:relative;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid rgba(244,235,221,.32);
  color:var(--cream);
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:currentColor;transition:background-color .2s ease}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform .22s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.header-progress{height:2px;background:rgba(244,235,221,.1)}
.header-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--mint),var(--sand) 68%,var(--poplar));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--indigo);color:var(--cream);margin-top:var(--step);overflow:hidden}
.site-footer__edge{height:3px;background:linear-gradient(90deg,var(--poplar) 0%,var(--sand) 46%,var(--mint) 100%)}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(244,235,221,.05) 0 1px,transparent 1px 4px);
  opacity:.5;
}
.footer-inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(20px,3vw,32px);
}
.footer-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.7fr);gap:clamp(24px,4vw,56px)}

.footer-brand__name{font-family:var(--font-display);font-size:clamp(26px,3.4vw,34px);font-weight:800;letter-spacing:.06em}
.footer-brand__line{
  margin-top:10px;display:inline-block;
  padding:3px 10px;
  background:rgba(36,240,200,.12);
  color:var(--mint);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  clip-path:polygon(0 0,100% 0,100% 100%,8px 100%,0 calc(100% - 8px));
}
.footer-brand__meta{margin-top:12px;font-size:13px;color:rgba(244,235,221,.55);max-width:22em}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,32px)}
.footer-nav__title{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  color:var(--sand);text-transform:uppercase;
  padding-bottom:10px;margin-bottom:10px;
  border-bottom:1px solid var(--line-dark);
}
.footer-nav__list{display:flex;flex-direction:column;gap:8px}
.footer-nav__link{font-size:14px;color:rgba(244,235,221,.76);transition:color .2s ease}
.footer-nav__link:hover,.footer-nav__link:focus-visible{color:var(--mint)}

.footer-contact{
  margin-top:clamp(28px,4vw,48px);
  padding-top:clamp(20px,3vw,28px);
  border-top:1px solid var(--line-dark);
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);
  gap:clamp(18px,3vw,40px);
}
.footer-contact__list{display:flex;flex-direction:column;gap:10px}
.footer-contact__item{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.footer-contact__key{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(244,235,221,.45);min-width:64px;
}
.footer-contact__value{font-size:14px;color:var(--cream);word-break:break-word}
.copy-btn{
  padding:2px 8px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  color:rgba(244,235,221,.7);
  border:1px solid rgba(244,235,221,.28);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.copy-btn:hover,.copy-btn:focus-visible{color:var(--night);background:var(--mint);border-color:var(--mint)}
.footer-contact__note{font-size:12.5px;line-height:1.7;color:rgba(244,235,221,.5);max-width:36em}

.footer-legal{
  margin-top:clamp(24px,3.5vw,40px);
  padding-top:16px;
  border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
}
.footer-legal__item{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:rgba(244,235,221,.45)}

/* ============ 通用布局与组件 ============ */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:840px}
.prose{max-width:40em;font-size:17px;line-height:1.78}
.prose p+p{margin-top:1.05em}
.prose h2{margin-top:1.8em}
.prose h3{margin-top:1.4em}
.page-head{padding-block:clamp(28px,4.5vw,60px)}

.section{padding-block:var(--step)}
.section--night{background:var(--night);color:var(--cream)}
.section--night h2,.section--night h3{color:var(--cream)}
.section--dark-line{border-top:1px solid var(--line)}

.rule{height:1px;background:var(--line);border:0;margin-block:clamp(24px,4vw,40px)}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--stone);
}
.eyebrow--light{color:var(--sand)}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}

.split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:clamp(20px,4vw,56px)}
.split--flip{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}

.score{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--mint);
  letter-spacing:.02em;
}
.round-badge{
  display:inline-block;
  padding:2px 10px;
  background:var(--sand);
  color:var(--night);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  clip-path:polygon(0 0,100% 0,100% 100%,8px 100%,0 calc(100% - 8px));
}
.tag{
  display:inline-block;
  padding:2px 9px;
  border:1px solid var(--line);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--stone);
}
.data-band{
  display:flex;flex-wrap:wrap;gap:clamp(14px,3vw,44px);
  padding:16px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--stone);
}
.data-band--night{
  background:var(--night);color:rgba(244,235,221,.7);
  border-color:var(--line-dark);
  padding-inline:var(--gutter);
}

.figure{margin:0}
.figure__media{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 9;
  background:linear-gradient(135deg,var(--night) 0%,var(--indigo) 52%,var(--moss) 100%);
  border:1px solid var(--line-dark);
}
.figure__media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.figure__media::before{
  content:"";position:absolute;right:-12%;bottom:-32%;
  width:58%;height:76%;
  background:linear-gradient(135deg,var(--clay),var(--poplar));
  opacity:.3;transform:rotate(-9deg);
}
.figure__media::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(11,20,38,.18) 0 1px,transparent 1px 3px);
  opacity:.45;
}
.figure__caption{
  padding-top:9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--stone);
}
.figure--4x3 .figure__media{aspect-ratio:4 / 3}
.figure--1x1 .figure__media{aspect-ratio:1 / 1}

.breadcrumb{padding-block:16px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--stone)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__list li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__list li+li::before{content:"/";color:var(--line)}
.breadcrumb__link{color:var(--stone);transition:color .2s ease}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--moss)}

[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .site-nav__list{gap:14px}
  .site-nav__link{font-size:13px}
  .footer-top{grid-template-columns:1fr}
}

@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    margin-left:0;
    padding:6px max(var(--gutter),calc((100% - var(--wrap)) / 2 + var(--gutter))) 18px;
    background:var(--night);
    border-top:1px solid var(--line-dark);
    border-bottom:1px solid var(--line-dark);
    max-height:calc(100vh - 100px);
    overflow-y:auto;
  }
  .site-nav[data-open="true"]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{display:block;padding:14px 0;font-size:16px;border-bottom:1px solid var(--line-dark)}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{color:var(--mint);border-bottom-color:rgba(36,240,200,.35)}
  .header-bar{flex-wrap:nowrap}
  .header-rail__note{display:none}
  .header-rail__track{max-width:50%}
}

@media (max-width:860px){
  .split,.split--flip{grid-template-columns:1fr}
  .footer-contact{grid-template-columns:1fr}
}

@media (max-width:760px){
  body{font-size:16px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .footer-nav{grid-template-columns:1fr 1fr}
  .brand__sub{display:none}
  .brand__mark{width:32px;height:32px;font-size:14px}
  .brand__name{font-size:17px}
  .header-bar{padding-block:12px}
  .btn--cta{padding:10px 14px;font-size:11px;letter-spacing:.08em}
  .header-rail{font-size:9px;letter-spacing:.12em;gap:10px}
  .header-rail__track{max-width:44%}
}

@media (max-width:520px){
  .footer-nav{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;gap:6px}
  .footer-contact__item{gap:6px 10px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .pulse-dot{animation:none;box-shadow:0 0 0 2px rgba(36,240,200,.35)}
  [data-reveal]{opacity:1;transform:none}
  .header-progress__bar{transition:none}
}