/* ===== 0. Reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;}
body{margin:0;}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}

/* ===== 1. Tokens ===== */
:root{
  --ink-900:#0A2A21;
  --ink-800:#0E332A;
  --ink-700:#143D30;
  --lime:#C9F24D;
  --lime-soft:#E6FFA3;
  --paper:#F4EFE2;
  --paper-2:#E2DCC9;
  --ember:#FF5A21;
  --brown:#201C14;
  --steel:#8CA39C;
  --glass:rgba(255,255,255,0.08);

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-display);
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell:1280px;
  --gutter:24px;
  --ease:cubic-bezier(.4,0,.2,1);
}

/* ===== 2. Base & 中文排版 ===== */
body{
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.55;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--lime);color:var(--ink-900);}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;}
.panel--paper :focus-visible,
.prose :focus-visible{outline-color:var(--ember);}

/* ===== 3. 通用布局 ===== */
.container{width:min(100% - 32px,var(--shell));margin-inline:auto;}
.container--narrow{width:min(100% - 32px,820px);margin-inline:auto;}
.section{padding:clamp(48px,7vw,96px) 0;position:relative;}
.divider{height:1px;border:0;background:rgba(201,242,77,.25);margin:0;}
.hairline{border:0;border-top:1px solid rgba(32,28,20,.16);margin:0;}

/* ===== 4. 堆叠面板 ===== */
.panel{
  background:var(--ink-900);
  color:var(--paper);
  padding:clamp(28px,4vw,56px);
  border-top:1px solid rgba(201,242,77,.22);
}
.panel--deep{background:var(--ink-700);}
.panel--paper{background:var(--paper);color:var(--brown);border-top:1px solid rgba(32,28,20,.12);}
.panel--glass{background:var(--glass);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(8px);}
.texture-field{background-image:repeating-linear-gradient(112deg,rgba(201,242,77,.05) 0 14px,rgba(201,242,77,0) 14px 30px);}

/* ===== 5. 字体组件 ===== */
.h-display,.h-1,.h-2,.h-3{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.02;}
.h-display{font-size:clamp(52px,10vw,144px);line-height:.94;}
.h-1{font-size:clamp(34px,5.6vw,64px);}
.h-2{font-size:clamp(26px,3.6vw,40px);}
.h-3{font-size:clamp(19px,2.2vw,28px);line-height:1.2;}
.lede{font-size:clamp(16px,1.5vw,20px);line-height:1.6;max-width:60ch;color:rgba(244,239,226,.82);}
.panel--paper .lede{color:rgba(32,28,20,.78);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.2em;color:var(--lime);}
.panel--paper .eyebrow{color:var(--ember);}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em;}
.annotation{font-size:12px;letter-spacing:.18em;color:var(--steel);}
.annotation--vertical{writing-mode:vertical-rl;letter-spacing:.24em;}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;font-size:12px;letter-spacing:.14em;background:var(--lime-soft);color:var(--ink-900);}
.tag--ember{background:var(--ember);color:#fff;}
.tag--ghost{background:transparent;border:1px solid currentColor;color:inherit;}

/* ===== 6. 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;border:1px solid transparent;background:transparent;
  font-family:var(--font-body);font-weight:700;font-size:15px;letter-spacing:.08em;
  cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn--lime{background:var(--lime);color:var(--ink-900);}
.btn--lime:hover{background:var(--lime-soft);transform:translateY(-3px);}
.btn--ghost{border-color:rgba(244,239,226,.35);color:var(--paper);}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);background:var(--glass);transform:translateY(-3px);}
.btn--ember{background:var(--ember);color:#fff;}
.btn--ember:hover{background:#ff7443;transform:translateY(-3px);}
.panel--paper .btn--ghost{border-color:rgba(32,28,20,.3);color:var(--brown);}
.panel--paper .btn--ghost:hover{border-color:var(--ember);color:var(--ember);background:rgba(255,90,33,.07);}

/* ===== 7. 网格与错落 ===== */
.grid{display:grid;gap:clamp(18px,2.4vw,32px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--62-38{grid-template-columns:minmax(0,62fr) minmax(0,38fr);}
.grid--55-45{grid-template-columns:minmax(0,55fr) minmax(0,45fr);}
.split-offset>*:nth-child(even){transform:translateY(24px);}

/* ===== 8. 步骤 / 技能树 ===== */
.flow{counter-reset:step;position:relative;}
.flow>li{position:relative;padding:2px 0 26px 46px;}
.flow>li::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:0;width:28px;height:28px;
  display:grid;place-items:center;background:var(--ember);color:#fff;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
}
.flow>li::after{content:"";position:absolute;left:13px;top:32px;bottom:4px;width:1px;background:rgba(201,242,77,.35);}
.flow>li:last-child{padding-bottom:0;}
.flow>li:last-child::after{display:none;}

/* ===== 9. 图片容器 ===== */
.media-frame{position:relative;overflow:hidden;background:var(--ink-700);aspect-ratio:16/9;margin:0;}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(112deg,rgba(201,242,77,.06) 0 12px,rgba(201,242,77,0) 12px 26px);
}
.media-frame figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:10px 14px;
  font-size:12px;letter-spacing:.16em;color:var(--paper);
  background:linear-gradient(180deg,rgba(10,42,33,0) 0%,rgba(10,42,33,.85) 100%);
}
.media-frame--tall{aspect-ratio:4/5;}
.media-frame--wide{aspect-ratio:21/9;}

/* ===== 10. 正文与面包屑 ===== */
.prose{font-size:16px;line-height:1.7;max-width:70ch;}
.prose>*+*{margin-top:1em;}
.prose h2{font-family:var(--font-display);font-weight:900;font-size:clamp(22px,2.6vw,32px);line-height:1.2;letter-spacing:-.01em;margin-top:1.6em;}
.prose h3{font-size:19px;font-weight:700;margin-top:1.4em;}
.prose ul,.prose ol{padding-left:1.2em;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li+li{margin-top:.4em;}
.prose strong{font-weight:700;}
.prose a{color:var(--lime);text-decoration:underline;text-underline-offset:3px;}
.panel--paper .prose a{color:#C0390A;}

.breadcrumb{font-size:12px;letter-spacing:.14em;color:var(--steel);}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:rgba(244,239,226,.3);}
.breadcrumb a{color:inherit;}
.breadcrumb a:hover{color:var(--lime);}
.panel--paper .breadcrumb{color:rgba(32,28,20,.6);}
.panel--paper .breadcrumb li+li::before{color:rgba(32,28,20,.3);}
.panel--paper .breadcrumb a:hover{color:var(--ember);}

/* ===== 11. 页头 ===== */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:60;
  padding:10px 16px;background:var(--lime);color:var(--ink-900);
  font-size:14px;font-weight:700;letter-spacing:.08em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

.site-header{
  position:sticky;top:0;z-index:40;
  background:var(--ink-900);
  color:var(--paper);
  border-bottom:1px solid rgba(201,242,77,.22);
}
.header-shell{width:min(100% - 32px,var(--shell));margin-inline:auto;}

.header-strip{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:34px;padding:4px 0;
  border-bottom:1px solid rgba(244,239,226,.10);
  font-size:12px;letter-spacing:.16em;color:var(--steel);
}
.strip-note{margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.strip-tools{display:flex;align-items:center;gap:16px;flex:none;}

.update-panel{display:inline-flex;align-items:center;gap:8px;}
.update-dot{width:7px;height:7px;border-radius:50%;background:var(--ember);box-shadow:0 0 0 4px rgba(255,90,33,.16);}
.update-label{color:var(--steel);}
.update-value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;letter-spacing:.06em;color:var(--lime);}

.density-toggle{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 11px;background:transparent;
  border:1px solid rgba(244,239,226,.20);color:var(--paper);
  font-size:12px;letter-spacing:.14em;cursor:pointer;
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.density-dot{width:6px;height:6px;border-radius:50%;background:var(--steel);transition:background .25s var(--ease);}
.density-toggle:hover{background:var(--glass);border-color:rgba(201,242,77,.55);color:var(--lime);transform:translateY(-1px);}
.density-toggle[aria-pressed="true"]{border-color:var(--lime);color:var(--lime);}
.density-toggle[aria-pressed="true"] .density-dot{background:var(--lime);}

.header-bar{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:10px 0 12px;}
.brand-block{display:flex;flex-direction:column;gap:2px;min-width:0;}
.brand-mark{
  font-family:var(--font-display);font-weight:900;font-size:24px;line-height:1.1;
  letter-spacing:-.02em;color:var(--paper);
  transition:color .25s var(--ease);
}
.brand-mark:hover{color:var(--lime);}
.brand-note{margin:0;font-size:12px;letter-spacing:.14em;color:var(--steel);}

.nav-block{min-width:0;}
.nav-list{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-block;padding:9px 13px;
  font-size:15px;letter-spacing:.06em;color:var(--paper);
  transition:color .25s var(--ease),transform .25s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--lime);transform:translateY(-2px);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--lime);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

.nav-toggle{
  display:none;align-items:center;gap:9px;flex:none;
  padding:8px 12px;background:transparent;
  border:1px solid rgba(244,239,226,.22);color:var(--paper);
  font-size:12px;letter-spacing:.14em;cursor:pointer;
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime);background:var(--glass);}
.nav-toggle-bars{display:grid;gap:4px;width:16px;}
.nav-toggle-bar{display:block;height:2px;background:var(--lime);transition:transform .28s var(--ease);}
.site-header[data-open] .nav-toggle{border-color:var(--lime);color:var(--lime);}
.site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(3px) rotate(45deg);}
.site-header[data-open] .nav-toggle-bar:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

.scroll-progress{position:absolute;left:0;right:0;bottom:-2px;height:2px;background:rgba(244,239,226,.12);overflow:hidden;}
.scroll-progress-bar{display:block;height:100%;width:100%;background:var(--lime);transform:scaleX(0);transform-origin:0 50%;}

/* 移动端底部悬浮赛程条 */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:38;
  display:none;grid-template-columns:1fr 1fr;
  background:var(--ink-900);
  border-top:1px solid rgba(201,242,77,.32);
}
.mobile-bar-link{
  padding:15px 12px;text-align:center;
  font-size:15px;letter-spacing:.1em;color:var(--paper);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.mobile-bar-link:hover{background:var(--glass);color:var(--lime);}
.mobile-bar-link.is-accent{background:var(--lime);color:var(--ink-900);font-weight:700;}
.mobile-bar-link.is-accent:hover{background:var(--lime-soft);color:var(--ink-900);}

/* ===== 12. 页脚 ===== */
.site-footer{
  background:var(--ink-800);
  color:var(--paper);
  border-top:1px solid rgba(201,242,77,.28);
}
.footer-shell{width:min(100% - 32px,var(--shell));margin-inline:auto;padding:52px 0 26px;}
.footer-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding-bottom:18px;border-bottom:1px solid rgba(244,239,226,.12);
}
.footer-brand{font-family:var(--font-display);font-weight:900;font-size:26px;letter-spacing:-.02em;color:var(--paper);}
.footer-stamp{font-size:12px;letter-spacing:.18em;color:var(--steel);}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;padding:32px 0 8px;}
.footer-col{min-width:0;}
.footer-title{font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--lime);margin-bottom:14px;}
.footer-list{display:grid;gap:9px;}
.footer-link{
  display:inline-block;font-size:14px;color:var(--paper);opacity:.86;
  transition:color .22s var(--ease),opacity .22s var(--ease),transform .22s var(--ease);
}
.footer-link:hover{color:var(--lime);opacity:1;transform:translateX(3px);}
.footer-text{font-size:13px;line-height:1.7;color:var(--steel);}
.footer-contact{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:10px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:var(--paper);
}
.footer-contact-item{word-break:break-all;}
.copy-btn{
  padding:4px 10px;background:transparent;border:1px solid rgba(244,239,226,.25);
  color:var(--paper);font-family:var(--font-body);font-size:12px;letter-spacing:.12em;cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.copy-btn:hover{border-color:var(--lime);color:var(--lime);}
.copy-btn[data-copied="true"]{background:var(--lime);border-color:var(--lime);color:var(--ink-900);}
.footer-legal{
  display:flex;flex-wrap:wrap;gap:14px 24px;align-items:center;justify-content:space-between;
  margin-top:30px;padding-top:18px;border-top:1px solid rgba(244,239,226,.12);
  font-size:12px;letter-spacing:.12em;color:var(--steel);
}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-legal a{color:var(--paper);transition:color .22s var(--ease);}
.footer-legal a:hover{color:var(--lime);}
.footer-meta{margin:0;}

/* ===== 13. 通勤模式密度 ===== */
html[data-density="compact"] .annotation,
html[data-density="compact"] [data-compact-hide]{display:none;}
html[data-density="compact"] .prose,
html[data-density="compact"] .lede{line-height:1.42;}
html[data-density="compact"] .section{padding-top:clamp(28px,4vw,56px);padding-bottom:clamp(28px,4vw,56px);}
html[data-density="compact"] .grid{gap:14px;}
html[data-density="compact"] .split-offset>*:nth-child(even){transform:none;}

/* ===== 14. 显现 ===== */
html[data-js="on"] [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html[data-js="on"] [data-reveal].is-visible{opacity:1;transform:none;}

/* ===== 15. 响应式 ===== */
@media (max-width:920px){
  .header-strip{display:none;}
  .header-bar{gap:16px;padding:12px 0;}
  .brand-mark{font-size:20px;}
  .nav-toggle{display:inline-flex;}
  .nav-block{
    display:none;
    position:fixed;left:0;right:0;top:0;z-index:35;
    padding:76px 20px 28px;
    background:var(--ink-700);
    border-bottom:1px solid rgba(201,242,77,.35);
    box-shadow:0 26px 50px rgba(0,0,0,.5);
    max-height:100vh;overflow-y:auto;
  }
  .site-header[data-open] .nav-block{display:block;animation:navDrop .26s var(--ease);}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link{display:block;padding:15px 6px;font-size:19px;border-bottom:1px solid rgba(244,239,226,.10);}
  .nav-link::after{display:none;}
  .nav-link:hover{transform:none;}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--lime);padding-left:16px;}
  .mobile-bar{display:grid;}
  .site-footer{padding-bottom:62px;}
}
@keyframes navDrop{from{opacity:0;transform:translateY(-10px);}to{opacity:1;transform:translateY(0);}}

@media (max-width:900px){
  .grid--2,.grid--3,.grid--62-38,.grid--55-45{grid-template-columns:minmax(0,1fr);}
  .split-offset>*:nth-child(even){transform:none;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
}
@media (max-width:600px){
  .footer-shell{padding:40px 0 22px;}
  .footer-brand{font-size:22px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:12px;}
  .panel{padding:24px 18px;}
}

/* ===== 16. 减弱动效 ===== */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html[data-js="on"] [data-reveal]{opacity:1;transform:none;}
  .split-offset>*:nth-child(even){transform:none;}
  .scroll-progress-bar{transition:none;}
}