*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:#101A33}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:#22A05A;text-decoration:none}

:root{
  --ink:#101A33;
  --ink-2:#1B2A4A;
  --ink-3:#0B1224;
  --turf:#22A05A;
  --turf-deep:#14703E;
  --track:#FF6A2B;
  --lime:#D6FF3F;
  --paper:#F4F6EF;
  --text:#0C1220;
  --mute:#8A93A6;
  --line:#2C3A57;
  --on-ink:#E9EEF7;
  --rail-w:236px;
  --gutter:clamp(1.15rem,3.5vw,3.25rem);
  --step-1:13px;
  --step-2:15px;
  --step-3:17px;
  --step-4:21px;
  --step-5:clamp(1.45rem,2.8vw,2rem);
  --step-6:clamp(2.6rem,6vw,5rem);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,sans-serif;
  --font-num:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}

body{
  min-height:100vh;
  background:var(--ink);
  color:var(--on-ink);
  font-family:var(--font-sans);
  font-size:var(--step-3);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--turf);color:#04120A}
#main-content{scroll-margin-top:72px}

/* 排版 */
h1,h2,h3,h4{font-weight:800;line-height:1.14;letter-spacing:-.015em;color:#fff}
h1{font-size:var(--step-6)}
h2{font-size:var(--step-5)}
h3{font-size:var(--step-4);line-height:1.3}
h4{font-size:var(--step-3);line-height:1.42;font-weight:700}
p{max-width:34em}
.lead{font-size:var(--step-4);line-height:1.62;color:#C9D3E6;max-width:32em}
.muted{color:var(--mute);font-size:var(--step-1);line-height:1.65;max-width:38em}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:-.01em}
.slash{display:inline-block;width:28px;height:3px;background:var(--track);transform:skewX(-24deg);vertical-align:middle}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* 焦点 */
:focus-visible{outline:2px solid var(--turf);outline-offset:3px}
.panel :focus-visible,.media :focus-visible,.btn:focus-visible,.nav-toggle:focus-visible,.steps__tab:focus-visible{outline-offset:-4px}

/* 容器与区块 */
.wrap{width:100%;max-width:1180px;margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(2.25rem,5.5vw,4.5rem);border-top:1px solid var(--line)}
.section:first-of-type{border-top:0}
.section--paper{background:var(--paper);color:var(--text)}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4{color:var(--text)}
.section--paper .section__note,.section--paper .muted{color:#5B6577}
.section--paper .section__num{color:var(--turf-deep)}
.section--paper .tag{background:rgba(20,112,62,.12);color:#14703E;border-color:rgba(20,112,62,.35)}
.section--paper .tag--lime{background:#B9E02F;color:var(--ink);border-color:#B9E02F}
.section--paper .prose a{color:var(--turf-deep)}
.section--paper .panel{background:#fff;border-color:#DCE1D3}

.section__head{display:grid;gap:.45rem;margin-bottom:clamp(1.2rem,2.6vw,2rem)}
.section__num{
  font-family:var(--font-num);font-size:var(--step-1);font-weight:700;
  letter-spacing:.14em;color:var(--turf);display:inline-block;
  transform:skewX(-8deg);transform-origin:left center;width:fit-content;
}
.section__title{font-size:var(--step-5)}
.section__note{color:var(--mute);font-size:var(--step-2);line-height:1.7;max-width:38em}

/* 网格 */
.grid{display:grid;gap:clamp(1rem,2.4vw,1.75rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.grid--split{grid-template-columns:1fr}
@media (min-width:900px){.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}}
.flow>*+*{margin-top:var(--flow-gap,1rem)}

/* 按钮 */
.btn{
  --btn-bg:transparent;--btn-fg:var(--on-ink);--btn-bd:var(--line);
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  min-height:44px;padding:.68rem 1.1rem;
  font-size:var(--step-2);font-weight:700;line-height:1.2;letter-spacing:.02em;
  background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-bd);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{border-color:var(--turf)}
.btn:active{transform:translateY(1px)}
.btn--primary{--btn-bg:var(--turf);--btn-fg:#04120A;--btn-bd:var(--turf)}
.btn--primary:hover{--btn-bg:var(--turf-deep);--btn-fg:#F0FFF7;--btn-bd:var(--turf-deep)}
.btn--ghost{--btn-bg:transparent;--btn-fg:var(--on-ink);--btn-bd:var(--line)}
.btn--ghost:hover{--btn-fg:#fff;--btn-bg:rgba(34,160,90,.14);--btn-bd:var(--turf)}
.btn--block{display:flex;width:100%}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.14rem .5rem;font-size:12px;font-weight:700;line-height:1.6;letter-spacing:.06em;
  background:rgba(34,160,90,.16);color:#9BE3B8;border:1px solid rgba(34,160,90,.38);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.tag--lime{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.tag--track{background:rgba(255,106,43,.16);color:#FFB08A;border-color:rgba(255,106,43,.42)}

/* 切角面板 */
.panel{
  position:relative;
  background:var(--ink-2);border:1px solid var(--line);
  padding:clamp(1.05rem,2.4vw,1.7rem);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.panel--lift:hover{transform:translateY(-2px);box-shadow:0 20px 38px -24px rgba(0,0,0,.9);border-color:var(--turf-deep)}

/* 图片容器 */
.media{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/9;
  background:
    linear-gradient(135deg,rgba(34,160,90,.24),rgba(16,26,51,0) 58%),
    repeating-linear-gradient(-45deg,rgba(255,255,255,.055) 0 2px,transparent 2px 14px),
    var(--ink-2);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
}
.media img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04)}
.media--portrait{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:.7rem .85rem;font-size:12px;line-height:1.5;letter-spacing:.04em;color:#E7EDF9;
  background:linear-gradient(0deg,rgba(8,13,26,.88),rgba(8,13,26,0));
}

/* 面包屑 */
.crumbs{padding-block:1.15rem;font-size:var(--step-1);color:var(--mute)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.crumbs__item{display:inline-flex;align-items:center;gap:.4rem;min-width:0}
.crumbs__item+.crumbs__item::before{content:"/";color:var(--line)}
.crumbs__link{color:var(--mute);border-bottom:1px solid transparent;transition:color .16s var(--ease),border-color .16s var(--ease)}
.crumbs__link:hover{color:var(--on-ink);border-bottom-color:var(--turf)}
.crumbs__current{color:var(--on-ink);font-weight:700}
.section--paper .crumbs{color:#5B6577}
.section--paper .crumbs__link{color:#5B6577}
.section--paper .crumbs__link:hover{color:var(--text)}
.section--paper .crumbs__current{color:var(--text)}

/* 三步索引 */
.steps{display:grid;gap:1.15rem;grid-template-columns:1fr}
@media (min-width:720px){.steps{grid-template-columns:minmax(0,220px) minmax(0,1fr);align-items:start}}
.steps__list{display:flex;flex-direction:column;gap:.4rem}
.steps__tab{
  display:flex;align-items:center;gap:.6rem;width:100%;
  padding:.6rem .75rem;text-align:left;
  background:transparent;border:1px solid var(--line);color:#B9C4D8;
  font-size:var(--step-2);font-weight:700;line-height:1.35;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.steps__tab:hover{color:#fff;border-color:var(--turf)}
.steps__tab[data-active]{background:rgba(34,160,90,.18);color:#fff;border-color:var(--turf)}
.steps__num{font-family:var(--font-num);font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--turf);transform:skewX(-8deg)}
.steps__tab[data-active] .steps__num{color:var(--lime)}
.steps__panels{min-width:0}
.steps__panel{font-size:var(--step-3);color:#C6D0E2;max-width:34em}
.steps__panel[data-active]{color:#DDE5F3}
.steps[data-steps-ready] .steps__panel{display:none}
.steps[data-steps-ready] .steps__panel[data-active]{display:block}

/* 正文 */
.prose{max-width:34em}
.prose>*+*{margin-top:1.15em}
.prose h3,.prose h4{margin-top:1.9em}
.prose ul,.prose ol{display:grid;gap:.5em;padding-left:1.15em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li::marker{color:var(--turf)}
.prose a{color:var(--turf);border-bottom:1px solid rgba(34,160,90,.45);transition:border-color .16s var(--ease),color .16s var(--ease)}
.prose a:hover{color:#7BE0AC;border-bottom-color:#7BE0AC}
.prose strong{color:#fff;font-weight:700}

/* ============ 头部：品牌轨道 ============ */
.skip-link{
  position:fixed;top:.75rem;left:.75rem;z-index:200;
  padding:.62rem 1rem;background:var(--lime);color:var(--ink);
  font-size:var(--step-2);font-weight:800;letter-spacing:.02em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transform:translateY(-320%);
  transition:transform .16s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  --progress:0;
  position:fixed;inset:0 auto 0 0;z-index:80;
  width:var(--rail-w);
  display:flex;flex-direction:column;gap:1.1rem;
  padding:1.35rem 1rem 1.15rem;
  background:linear-gradient(180deg,#16223F 0%,#101A33 46%,#0C1526 100%);
  border-right:1px solid var(--line);
  isolation:isolate;
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:repeating-linear-gradient(-45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 13px);
}
.rail__top{display:flex;align-items:center;justify-content:space-between;gap:.7rem;min-width:0}

.brand{display:flex;align-items:center;gap:.6rem;min-width:0;color:var(--on-ink);text-decoration:none}
.brand__mark{
  flex:0 0 auto;display:grid;place-items:center;width:38px;height:38px;
  background:var(--turf);color:#04120A;
  font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.04em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:background-color .16s var(--ease),transform .16s var(--ease);
}
.brand:hover .brand__mark{background:var(--lime);transform:translateY(-1px)}
.brand__text{display:flex;flex-direction:column;gap:.1rem;min-width:0}
.brand__name{font-size:var(--step-3);font-weight:800;line-height:1.15;letter-spacing:.02em;color:#fff;white-space:nowrap}
.brand__tag{font-size:11px;line-height:1.35;letter-spacing:.04em;color:var(--mute);white-space:nowrap}

.nav-toggle{
  display:none;place-items:center;width:44px;height:44px;flex:0 0 auto;
  border:1px solid var(--line);background:rgba(27,42,74,.65);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--turf);background:rgba(34,160,90,.18)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:2px;background:var(--on-ink);transition:transform .18s var(--ease),opacity .18s var(--ease)}
.site-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.rail__nav{display:flex;flex-direction:column;flex:1 1 auto;min-height:0;overflow-y:auto;scrollbar-width:thin}
.nav__list{display:flex;flex-direction:column;gap:2px}
.nav__item{min-width:0}
.nav__link{
  position:relative;display:flex;align-items:center;gap:.55rem;
  padding:.6rem .55rem .6rem .75rem;
  color:#B7C2D6;font-size:var(--step-2);font-weight:600;line-height:1.25;
  text-decoration:none;
  transition:color .16s var(--ease),background-color .16s var(--ease);
}
.nav__link::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:0;
  transform:translateY(-50%);background:var(--turf);
  transition:height .18s var(--ease),background-color .18s var(--ease);
}
.nav__link:hover{color:#fff;background:rgba(34,160,90,.13)}
.nav__link:hover::before{height:14px}
.nav__link[aria-current="page"]{color:#fff;background:rgba(34,160,90,.2)}
.nav__link[aria-current="page"]::before{height:18px;background:var(--lime)}
.nav__num{font-family:var(--font-num);font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--turf);transform:skewX(-8deg);min-width:1.65em}
.nav__link[aria-current="page"] .nav__num{color:var(--lime)}
.nav__label{min-width:0}

.rail__actions{margin-top:auto;padding-top:1.35rem;display:grid;gap:.55rem}

.rail__now{
  display:flex;align-items:center;gap:.5rem;
  padding:.5rem .6rem;border:1px solid var(--line);background:rgba(11,18,36,.72);
  font-size:12px;line-height:1.4;color:var(--mute);
}
.rail__now[hidden]{display:none}
.rail__now-num{font-family:var(--font-num);font-weight:700;letter-spacing:.06em;color:var(--lime);transform:skewX(-8deg)}
.rail__now-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.rail__meter{position:absolute;top:0;bottom:0;right:0;width:3px;background:rgba(44,58,87,.85)}
.rail__meter-bar{
  display:block;width:100%;height:100%;
  transform-origin:top center;transform:scaleY(var(--progress));
  background:linear-gradient(180deg,var(--lime),var(--turf));
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:clamp(2.25rem,6vw,4.5rem);
  background:linear-gradient(180deg,#0D1730 0%,#091021 100%);
  border-top:1px solid var(--line);color:#C6D0E2;
}
.site-footer__slope{
  height:10px;opacity:.75;
  background:repeating-linear-gradient(-45deg,var(--turf) 0 6px,transparent 6px 15px);
}
.site-footer__inner{
  width:100%;max-width:1180px;margin-inline:auto;
  padding:clamp(1.9rem,4.5vw,3.25rem) var(--gutter);
  display:grid;gap:clamp(1.6rem,3vw,2.5rem);grid-template-columns:1fr;
}
.foot-brand__link{display:inline-flex;align-items:center;gap:.6rem;color:#fff;text-decoration:none}
.foot-brand__mark{
  display:grid;place-items:center;width:34px;height:34px;
  background:var(--turf);color:#04120A;
  font-family:var(--font-num);font-size:12px;font-weight:700;letter-spacing:.04em;
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%);
  transition:background-color .16s var(--ease);
}
.foot-brand__link:hover .foot-brand__mark{background:var(--lime)}
.foot-brand__name{font-size:var(--step-4);font-weight:800;letter-spacing:.02em;color:#fff}
.foot-brand__line{margin-top:.85rem;font-size:var(--step-2);line-height:1.75;color:#9FAAC2;max-width:24em}
.foot-brand__meta{margin-top:.9rem;font-family:var(--font-num);font-size:12px;letter-spacing:.06em;color:var(--mute)}

.foot-nav{display:grid;gap:clamp(1.25rem,3vw,2rem);grid-template-columns:repeat(auto-fit,minmax(112px,1fr))}
.foot-col{min-width:0}
.foot-col__head{
  font-size:12px;font-weight:700;line-height:1.5;letter-spacing:.16em;
  color:var(--turf);margin-bottom:.85rem;
}
.foot-col__list{display:grid;gap:.5rem}
.foot-col__link{
  display:inline-block;width:fit-content;color:#B7C2D6;font-size:var(--step-2);line-height:1.6;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.foot-col__link:hover{color:#fff;border-bottom-color:var(--lime)}

.foot-contact__list{display:grid;gap:.6rem}
.foot-contact__row{display:grid;gap:.1rem}
.foot-contact__k{font-size:11px;letter-spacing:.14em;color:var(--mute)}
.foot-contact__v{font-size:var(--step-2);line-height:1.6;color:#DCE3F2;word-break:break-word}
.foot-contact__note{margin-top:.9rem;font-size:12px;line-height:1.7;color:var(--mute);max-width:26em}

.site-footer__base{border-top:1px solid var(--line);background:rgba(9,15,30,.6)}
.site-footer__base-inner{
  width:100%;max-width:1180px;margin-inline:auto;
  padding:1.05rem var(--gutter);
  display:flex;flex-wrap:wrap;gap:.4rem 1.6rem;justify-content:space-between;
}
.foot-legal{font-size:12px;line-height:1.65;color:var(--mute);max-width:none}

/* ============ 响应式 ============ */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-footer__inner{grid-template-columns:minmax(0,1.1fr) minmax(0,1.7fr) minmax(0,1fr);align-items:start}
}
@media (max-width:1023px){
  body{padding-top:56px}
  .site-header{
    inset:0 0 auto 0;width:auto;height:56px;
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:0;padding:0 1rem;
    border-right:0;border-bottom:1px solid var(--line);
    background:rgba(14,24,44,.97);
  }
  .rail__top{flex:1 1 auto}
  .brand__tag{display:none}
  .brand__mark{width:32px;height:32px;font-size:12px}
  .brand__name{font-size:var(--step-2)}
  .nav-toggle{display:grid}
  .rail__nav{
    position:absolute;left:0;right:0;top:100%;
    flex:0 0 auto;max-height:0;overflow:hidden;visibility:hidden;
    background:#0E1830;border-bottom:1px solid var(--line);
    transition:max-height .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .rail__nav{
    max-height:min(78vh,34rem);overflow-y:auto;visibility:visible;
  }
  .nav__list{padding:.7rem 1rem .3rem;gap:2px}
  .nav__link{min-height:48px;font-size:16px;padding:.7rem .6rem .7rem .8rem;border-bottom:1px solid rgba(44,58,87,.5)}
  .nav__link::before{height:0}
  .rail__actions{margin-top:0;padding:.9rem 1rem 1rem;grid-template-columns:1fr;gap:.5rem}
  .rail__now{display:none}
  .rail__meter{top:auto;left:0;right:0;bottom:-1px;width:auto;height:2px}
  .rail__meter-bar{height:100%;transform-origin:left center;transform:scaleX(var(--progress))}
}
@media (max-width:600px){
  .lead{font-size:var(--step-3)}
  .site-footer__base-inner{flex-direction:column}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
}