:root{
  --ink:#07130F;
  --carbon:#0B0D0C;
  --panel:#10201A;
  --line:#24382E;
  --lime:#C6F73C;
  --lime-dim:#93C21A;
  --amber:#F2B33D;
  --paper:#F2F7F3;
  --muted:#93A99C;
  --coral:#FF6B57;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --radius-lg:24px;
  --radius-md:18px;
  --radius-sm:12px;
  --pill:999px;
  --w-content:1240px;
  --gutter:clamp(18px,4vw,44px);
  --header-h:74px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 520px at 84% -10%,rgba(198,247,60,.10),transparent 68%),
    repeating-linear-gradient(90deg,rgba(36,56,46,.28) 0 1px,transparent 1px 108px);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.15;letter-spacing:-.02em;margin:0}
p{margin:0}
a{color:inherit}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px}

.display{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(42px,7.4vw,94px);
  line-height:.95;
  letter-spacing:-.03em;
}
.display em{font-style:normal;color:var(--lime)}
.h2{font-size:clamp(24px,3.2vw,38px);font-weight:600;letter-spacing:-.02em;line-height:1.18}
.lede{font-size:clamp(16px,1.5vw,19px);line-height:1.75;color:var(--muted);max-width:56ch}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--muted);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime);flex:0 0 auto}
.meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}

.container{width:100%;max-width:var(--w-content);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:1400px}
.section{position:relative;padding-block:clamp(48px,7vw,104px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--panel{
  background:linear-gradient(180deg,var(--panel),rgba(16,32,26,.42));
  border-block:1px solid var(--line);
}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(20px,3vw,36px)}
.rule{height:1px;background:var(--line);border:0;margin-block:clamp(24px,4vw,48px)}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--3-9{grid-template-columns:3fr 9fr}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}

.page-top{padding-top:calc(var(--header-h) + clamp(20px,4vw,44px))}
#main-content{scroll-margin-top:calc(var(--header-h) + 12px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:var(--pill);border:1px solid transparent;
  font-family:var(--font-display);font-weight:600;font-size:14.5px;letter-spacing:.03em;
  text-decoration:none;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--lime{background:var(--lime);color:var(--ink)}
.btn--lime:hover{background:var(--lime-dim)}
.btn--ghost{background:rgba(16,32,26,.55);border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--amber{background:var(--amber);color:var(--ink)}
.btn--sm{padding:9px 16px;font-size:13px}
.btn--block{width:100%}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--pill);border:1px solid var(--line);
  background:rgba(11,13,12,.45);color:var(--muted);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;line-height:1.7;
  text-transform:uppercase;
}
.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.tag--amber{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.tag--ghost-lime{color:var(--lime);border-color:rgba(198,247,60,.45)}
.tag--ghost-amber{color:var(--amber);border-color:rgba(242,179,61,.45)}

.breadcrumb{padding-block:18px 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.breadcrumb a:hover{color:var(--lime);border-bottom-color:var(--lime)}

.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,32px);
}
.panel--flush{padding:0;overflow:hidden}
.panel--lime{border-color:rgba(198,247,60,.38);box-shadow:inset 0 1px 0 rgba(198,247,60,.16)}

.prose{max-width:68ch}
.prose p{margin-bottom:1.1em;color:#D7E2DB}
.prose h3{margin:1.6em 0 .5em;font-size:20px}
.prose ul{margin:0 0 1.1em;padding:0;list-style:none}
.prose li{position:relative;padding-left:20px;margin-bottom:.5em;color:#D7E2DB}
.prose li::before{content:"";position:absolute;left:0;top:.8em;width:8px;height:1px;background:var(--lime)}

.data-table{font-size:15px}
.data-table caption{
  text-align:left;padding-bottom:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase;
}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.data-table thead th{
  font-family:var(--font-mono);font-size:11px;font-weight:400;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;background:rgba(11,13,12,.5);
}
.data-table td.num,.data-table th.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.data-table tbody tr:hover{background:rgba(198,247,60,.05)}

.step-rail{margin:0}
.step{position:relative;display:grid;grid-template-columns:44px 1fr;gap:16px;padding-bottom:28px}
.step::before{content:"";position:absolute;left:21px;top:52px;bottom:0;width:1px;background:linear-gradient(180deg,var(--line),transparent)}
.step:last-child{padding-bottom:0}
.step:last-child::before{display:none}
.step__index{
  display:grid;place-items:center;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:var(--carbon);
  font-family:var(--font-mono);font-size:13px;color:var(--lime);
}
.step__body h3{font-size:18px;margin-bottom:6px}
.step__body p{color:var(--muted);font-size:15px;line-height:1.75}

.tabs__list{
  display:flex;flex-wrap:wrap;gap:6px;width:fit-content;max-width:100%;
  padding:6px;border:1px solid var(--line);border-radius:var(--pill);
  background:rgba(11,13,12,.55);overflow-x:auto;
}
.tabs__tab{
  padding:9px 16px;border-radius:var(--pill);white-space:nowrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--muted);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.tabs__tab:hover{color:var(--paper)}
.tabs__tab[aria-selected="true"]{background:var(--lime);color:var(--ink)}
.tabs__tab[aria-selected="true"]:hover{color:var(--ink)}
.tabs__panel{padding-top:24px;animation:panelIn .22s var(--ease) both}
.tabs__panel[hidden]{display:none}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.media{margin:0;display:grid;gap:10px}
.media__frame{
  position:relative;overflow:hidden;aspect-ratio:16/9;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:linear-gradient(150deg,var(--panel),var(--carbon));
}
.media__frame--tall{aspect-ratio:4/5}
.media__frame--square{aspect-ratio:1}
.media__img{width:100%;height:100%;object-fit:cover}
.media__placeholder{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--line);
}
.media__cap{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted)}

.toast{
  position:fixed;left:50%;bottom:28px;z-index:130;
  max-width:calc(100% - 32px);padding:12px 20px;border-radius:var(--pill);
  background:var(--paper);color:var(--ink);font-size:14px;font-weight:600;
  opacity:0;pointer-events:none;transform:translate(-50%,12px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

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

/* ============ 头部 ============ */
.skip-link{
  position:fixed;top:12px;left:12px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--lime);color:var(--ink);font-size:14px;font-weight:700;text-decoration:none;
  transform:translateY(-180%);transition:transform .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

.scroll-meter{position:fixed;top:0;left:0;right:0;height:2px;z-index:110;pointer-events:none;background:rgba(198,247,60,.10)}
.scroll-meter__bar{display:block;height:100%;width:0;background:var(--lime);box-shadow:0 0 12px rgba(198,247,60,.55);transition:width .1s linear}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:linear-gradient(180deg,rgba(7,19,15,.94),rgba(7,19,15,.42) 72%,rgba(7,19,15,0));
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header.is-solid{
  background-color:rgba(11,13,12,.97);
  border-bottom-color:var(--line);
  backdrop-filter:blur(10px) saturate(1.15);
}
.site-header[data-open]{background-color:var(--ink);backdrop-filter:none;border-bottom-color:transparent}
.site-header__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  max-width:1400px;margin-inline:auto;min-height:var(--header-h);
  padding:12px var(--gutter);
}

.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper);flex:0 0 auto}
.brand__glyph{
  display:grid;place-items:center;width:40px;height:40px;border-radius:14px;
  background:var(--lime);color:var(--ink);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:-.04em;
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-family:var(--font-display);font-size:15.5px;font-weight:600;letter-spacing:.06em}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--muted);margin-top:4px}

.site-nav{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(2px,1vw,14px)}
.site-nav__item{transition:transform .18s var(--ease)}
.site-nav__item:nth-child(even){transform:translateY(4px)}
.site-nav__link{
  position:relative;display:inline-block;padding:10px 9px;
  font-size:14.5px;letter-spacing:.03em;color:var(--muted);text-decoration:none;
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:9px;right:9px;bottom:4px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--paper)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--paper)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__aside{display:none}
.site-nav__meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--muted)}

.header-tools{display:flex;align-items:center;gap:clamp(10px,1.4vw,20px);flex:0 0 auto}
.utility{display:flex;align-items:center;gap:16px}
.utility__link{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--muted);text-decoration:none;background:none;border:0;padding:0;cursor:pointer;
  transition:color .18s var(--ease);
}
.utility__link:hover{color:var(--lime)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:var(--pill);border:1px solid var(--line);
  background:rgba(16,32,26,.72);color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  position:relative;z-index:106;
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:1.5px;background:currentColor;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(2.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-2.75px) rotate(-45deg)}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:var(--carbon);border-top:1px solid var(--line);
  color:var(--muted);font-size:14px;
}
.site-footer__inner{
  position:relative;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:clamp(24px,3.4vw,48px);
  padding-block:clamp(36px,5vw,64px);
  padding-right:calc(var(--gutter) + 22px);
}
.site-footer__inner::after{
  content:"";position:absolute;right:var(--gutter);
  top:clamp(36px,5vw,64px);bottom:clamp(36px,5vw,64px);width:2px;
  background:linear-gradient(180deg,var(--lime),rgba(198,247,60,0));
}
.site-footer__brand .brand{margin-bottom:4px}
.site-footer__note{margin-top:16px;max-width:34ch;line-height:1.75;color:var(--muted)}
.site-footer__meta{margin-top:14px;color:var(--lime);font-size:11px;letter-spacing:.14em}
.site-footer__title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;color:var(--paper);text-transform:uppercase;margin-bottom:14px;
}
.site-footer__list{display:grid;gap:9px}
.site-footer__list a{
  color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-footer__list a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.site-footer__list--plain li{color:var(--muted);font-size:13.5px;line-height:1.7}
.site-footer__contact{
  display:flex;flex-wrap:wrap;gap:10px 32px;
  padding-block:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.site-footer__contact-item{display:flex;align-items:baseline;gap:10px;font-size:13px}
.site-footer__contact-item .meta{font-size:10.5px;letter-spacing:.18em;color:var(--lime)}
.site-footer__value{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:var(--paper);word-break:break-word}
.site-footer__bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;padding-block:18px 28px}
.site-footer__legal{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted)}
.site-footer__legal-links{display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px}
.site-footer__legal-links a{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.site-footer__legal-links a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.site-footer__copy{font-size:11px;letter-spacing:.12em}

/* ============ 响应式 ============ */
@media (max-width:1120px){
  .utility{display:none}
  .site-nav__link{font-size:14px;padding:10px 7px}
}
@media (max-width:960px){
  :root{--header-h:64px}
  .header-tools{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .grid--5-7,.grid--3-9,.grid--2{grid-template-columns:1fr}
  .site-nav{
    position:fixed;inset:0;z-index:104;margin:0;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:calc(var(--header-h) + 22px) var(--gutter) 40px;
    background-color:var(--ink);
    background-image:radial-gradient(620px 320px at 82% 0%,rgba(198,247,60,.13),transparent 70%);
    overflow-y:auto;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .site-header[data-open] .site-nav{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;counter-reset:nav}
  .site-nav__item,.site-nav__item:nth-child(even){transform:none;border-bottom:1px solid var(--line)}
  .site-nav__link{
    display:flex;align-items:baseline;gap:14px;padding:16px 2px;
    font-family:var(--font-display);font-weight:300;
    font-size:clamp(22px,5.4vw,30px);letter-spacing:-.01em;color:var(--paper);
  }
  .site-nav__link::before{
    counter-increment:nav;content:counter(nav,decimal-leading-zero);
    font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--lime);
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{color:var(--lime)}
  .site-nav__aside{
    display:flex;flex-direction:column;align-items:flex-start;gap:14px;
    margin-top:30px;padding-top:22px;border-top:1px solid var(--line);
  }
  .site-nav__aside .btn{width:100%;max-width:280px}
  html.is-locked,html.is-locked body{overflow:hidden}
  .site-footer__inner{grid-template-columns:1fr 1fr;padding-right:calc(var(--gutter) + 18px)}
  .site-footer__brand{grid-column:1 / -1}
  .site-footer__inner::after{right:calc(var(--gutter) - 2px)}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.75}
  .brand__sub{display:none}
  .brand__glyph{width:36px;height:36px;border-radius:12px}
  .tabs__list{width:100%}
  .tabs__tab{flex:1 1 auto;text-align:center}
  .site-footer__inner{grid-template-columns:1fr}
  .site-footer__inner::after{display:none}
  .site-footer__contact{flex-direction:column;gap:10px}
  .site-footer__bottom{flex-direction:column;align-items:flex-start}
  .data-table th,.data-table td{padding:10px}
  .data-table{font-size:13.5px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .has-js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}