/* ===== 01 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg,video{max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}

/* ===== 02 设计变量 ===== */
:root{
  --ink-deep:#0A3D3E;
  --ink-night:#062A2B;
  --mid-teal:#10565A;
  --field-teal:#1C7C7A;
  --neon:#00E5C7;
  --ember:#FF7A2F;
  --paper:#F2FAF8;
  --line:#BFE3DE;
  --data-black:#0D1A1A;
  --mist:#6E8C8A;

  --grad-data:linear-gradient(90deg,#00E5C7,#1C7C7A);
  --grad-data-v:linear-gradient(180deg,#00E5C7,#1C7C7A);
  --neon-veil:rgba(0,229,199,.10);
  --neon-edge:rgba(0,229,199,.34);
  --ember-veil:rgba(255,122,47,.12);

  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Roboto Mono",Menlo,Consolas,"Noto Sans SC",monospace;

  --r-sm:14px;
  --r-md:20px;
  --r-lg:28px;
  --r-pill:999px;

  --shell-w:1280px;
  --pad-x:clamp(16px,3vw,40px);
  --shadow-lift:0 18px 44px -26px rgba(6,42,43,.62);
  --ease-out:cubic-bezier(.22,.8,.2,1);
}

/* ===== 03 中文排版与全局基调 ===== */
body{
  background:var(--paper);
  color:var(--data-black);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--data-black);
}
h1{font-size:clamp(34px,4.6vw,64px)}
h2{font-size:clamp(26px,3.2vw,40px)}
h3{font-size:clamp(20px,2.2vw,26px)}
h4{font-size:18px;font-weight:800}
p{max-width:38em}
a{text-decoration-color:rgba(28,124,122,.45);text-underline-offset:3px}
a:hover{text-decoration-color:var(--field-teal)}
strong{font-weight:800}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:6px}

/* ===== 04 布局工具 ===== */
.shell{width:100%;max-width:var(--shell-w);margin:0 auto;padding:0 var(--pad-x)}
.shell--narrow{max-width:820px}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,7fr) minmax(0,3fr)}
.stack{display:grid;gap:clamp(12px,1.8vw,20px)}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--neon-edge),transparent);margin:0}

/* ===== 05 跳过链接 ===== */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  padding:11px 20px;
  border-radius:var(--r-pill);
  background:var(--neon);
  color:var(--ink-night);
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .22s var(--ease-out);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ===== 06 头部 ===== */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--ink-deep);
  color:var(--paper);
  border-bottom:1px solid var(--neon-edge);
  box-shadow:0 1px 0 rgba(0,229,199,.08);
  transition:box-shadow .3s ease,background .3s ease;
}
.site-header.is-condensed{
  background:var(--ink-night);
  box-shadow:0 14px 34px -24px rgba(0,0,0,.85);
}
.header-rail{
  display:flex;align-items:center;
  gap:clamp(12px,2.2vw,32px);
  width:100%;max-width:var(--shell-w);
  margin:0 auto;
  padding:0 var(--pad-x);
  min-height:84px;
  transition:min-height .28s var(--ease-out);
}
.site-header.is-condensed .header-rail{min-height:62px}

.brand-mark{
  display:flex;align-items:center;gap:12px;
  flex:0 1 auto;min-width:0;
  text-decoration:none;color:inherit;
}
.brand-glyph{
  display:grid;grid-template-columns:repeat(3,4px);
  align-items:end;gap:3px;
  height:26px;flex:0 0 auto;
}
.brand-glyph span{display:block;border-radius:2px;background:var(--neon);transition:height .28s var(--ease-out)}
.brand-glyph span:nth-child(1){height:12px;opacity:.55}
.brand-glyph span:nth-child(2){height:24px}
.brand-glyph span:nth-child(3){height:17px;background:var(--ember);opacity:.9}
.site-header.is-condensed .brand-glyph span:nth-child(1){height:9px}
.site-header.is-condensed .brand-glyph span:nth-child(2){height:19px}
.site-header.is-condensed .brand-glyph span:nth-child(3){height:13px}
.brand-text{display:flex;flex-direction:column;line-height:1.12;min-width:0}
.brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(17px,1.6vw,21px);
  letter-spacing:-.02em;color:var(--paper);white-space:nowrap;
}
.brand-tagline{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.08em;
  color:var(--mist);white-space:nowrap;
}
.site-header.is-condensed .brand-tagline{display:none}

.site-nav{
  display:flex;align-items:center;
  gap:clamp(8px,1.2vw,16px);
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:block}
.nav-link{
  display:inline-flex;align-items:center;
  padding:8px 14px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:14.5px;font-weight:600;
  color:rgba(242,250,248,.78);
  text-decoration:none;
  white-space:nowrap;
  transition:color .22s ease,border-color .22s ease,background .22s ease,padding .28s var(--ease-out),font-size .28s var(--ease-out);
}
.nav-link:hover{color:var(--neon);border-color:var(--neon-edge);background:var(--neon-veil)}
.nav-link[aria-current="page"]{
  color:var(--ink-night);
  background:var(--neon);
  border-color:var(--neon);
  font-weight:800;
}
.site-header.is-condensed .nav-link{padding:6px 12px;font-size:13.5px}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 18px;
  border-radius:var(--r-pill);
  background:var(--ember);
  color:#20100A;
  font-family:var(--font-display);
  font-weight:800;font-size:14px;
  text-decoration:none;white-space:nowrap;
  box-shadow:0 10px 24px -16px rgba(255,122,47,.95);
  transition:transform .22s var(--ease-out),filter .22s ease;
}
.nav-cta:hover{transform:translateY(-2px);filter:brightness(1.06)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--neon-edge);
  background:var(--neon-veil);
  color:var(--neon);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;
  cursor:pointer;
}
.nav-toggle-label{line-height:1}
.nav-toggle-bars{position:relative;display:block;width:18px;height:12px}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;
  background:currentColor;border-radius:2px;
  transition:transform .26s var(--ease-out),top .26s var(--ease-out);
}
.nav-toggle-bars::before{top:1px}
.nav-toggle-bars::after{top:9px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:5px;transform:rotate(-45deg)}

.header-ticker{display:none;background:var(--ink-night);border-top:1px solid rgba(0,229,199,.16);overflow:hidden}
.site-header.is-condensed .header-ticker{display:block}
.ticker-rail{
  display:flex;align-items:center;
  gap:clamp(14px,3vw,36px);
  width:100%;max-width:var(--shell-w);
  margin:0 auto;padding:0 var(--pad-x);
  height:38px;
}
.ticker-item{
  display:inline-flex;align-items:baseline;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--mist);white-space:nowrap;
}
.ticker-k{color:rgba(191,227,222,.72)}
.ticker-v{
  font-style:italic;font-variant-numeric:tabular-nums;
  font-weight:700;font-size:14px;color:var(--neon);
}
.ticker-note{
  margin-left:auto;
  font-family:var(--font-mono);font-size:11px;
  letter-spacing:.14em;text-transform:uppercase;
  color:rgba(110,140,138,.9);white-space:nowrap;
}

.header-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--grad-data);
  transform:scaleX(var(--progress,0));
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ===== 07 页脚 ===== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-night);
  color:rgba(242,250,248,.82);
  padding:clamp(52px,7vw,92px) 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:8px;
  background:var(--grad-data);
  clip-path:polygon(0 0,100% 0,100% 34%,0 100%);
}
.footer-inner{
  width:100%;max-width:var(--shell-w);
  margin:0 auto;padding:0 var(--pad-x);
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,2fr);
  gap:clamp(28px,4vw,56px);
}
.footer-brand{display:grid;gap:14px;align-content:start}
.footer-logo{
  display:inline-flex;align-items:center;gap:12px;
  text-decoration:none;color:var(--paper);
}
.footer-logo-text{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(21px,2.4vw,27px);letter-spacing:-.02em;
}
.footer-closing{
  font-size:14.5px;color:var(--neon);
  letter-spacing:.02em;max-width:22em;
}
.footer-contact{display:grid;gap:8px;margin-top:4px}
.footer-contact-row{
  display:grid;grid-template-columns:44px minmax(0,1fr);
  gap:10px;align-items:start;
  font-size:13.5px;line-height:1.7;
  color:rgba(242,250,248,.62);
  max-width:none;
}
.footer-contact-key{
  font-family:var(--font-mono);font-size:11px;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--field-teal);padding-top:3px;
}
.footer-map{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{display:grid;gap:0;align-content:start}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:12px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--neon);
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px dashed rgba(0,229,199,.26);
}
.footer-links{display:grid;gap:11px}
.footer-links a{
  display:inline-flex;align-items:center;gap:9px;
  font-size:15px;color:rgba(242,250,248,.76);
  text-decoration:none;
  transition:color .2s ease,transform .2s var(--ease-out);
}
.footer-links a::before{
  content:"";width:6px;height:6px;flex:0 0 auto;
  border-radius:50%;background:var(--field-teal);
  transition:background .2s ease;
}
.footer-links a:hover{color:var(--neon);transform:translateX(3px)}
.footer-links a:hover::before{background:var(--neon)}
.footer-base{
  margin-top:clamp(34px,5vw,60px);
  border-top:1px solid rgba(191,227,222,.18);
  padding:18px 0;
}
.footer-base-inner{
  width:100%;max-width:var(--shell-w);
  margin:0 auto;padding:0 var(--pad-x);
  display:flex;flex-wrap:wrap;align-items:center;
  gap:10px 30px;justify-content:space-between;
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  color:var(--mist);max-width:none;
}

/* ===== 08 按钮与标签 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.85em 1.5em;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-display);
  font-weight:800;font-size:15px;line-height:1.1;
  text-decoration:none;cursor:pointer;
  transition:transform .22s var(--ease-out),background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{
  background:var(--ember);color:#20100A;
  box-shadow:0 14px 30px -18px rgba(255,122,47,.95);
}
.btn--primary:hover{filter:brightness(1.06)}
.btn--neon{background:var(--neon);color:var(--ink-night)}
.btn--neon:hover{box-shadow:0 14px 30px -18px rgba(0,229,199,.9)}
.btn--ghost{
  background:transparent;color:var(--neon);
  border-color:var(--neon-edge);
}
.btn--ghost:hover{background:var(--neon-veil);border-color:var(--neon)}

.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--field-teal);
}
.eyebrow::before{
  content:"";width:22px;height:2px;border-radius:2px;background:var(--ember);
}
.tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.34em .78em;
  border-radius:var(--r-pill);
  background:rgba(28,124,122,.12);
  border:1px solid rgba(28,124,122,.26);
  color:var(--field-teal);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;
}
.score-pill{
  display:inline-flex;align-items:center;gap:.6em;
  padding:.42em .95em;
  border-radius:var(--r-pill);
  background:var(--neon-veil);
  border:1px solid var(--neon-edge);
  color:var(--neon);
  font-family:var(--font-mono);
  font-size:12.5px;letter-spacing:.08em;
  white-space:nowrap;
}
.score-num{
  font-style:italic;
  font-variant-numeric:tabular-nums;
  font-weight:700;font-size:16px;
  color:var(--paper);
}
.score-pill--live{
  background:var(--ember-veil);
  border-color:rgba(255,122,47,.45);
  color:var(--ember);
}
.score-pill--live .score-num{color:var(--ember)}

/* ===== 09 索引块 / 卡片 / 面板 ===== */
.index-block{
  position:relative;display:block;
  padding:22px 24px 22px 78px;
  border-radius:22px;
  background:#FFFFFF;
  border:1px solid var(--line);
  color:var(--data-black);
  text-decoration:none;
  transition:transform .3s var(--ease-out),border-color .3s ease,box-shadow .3s ease;
}
.index-block::before{
  content:attr(data-index);
  position:absolute;left:24px;top:24px;
  font-family:var(--font-mono);
  font-size:13px;font-style:italic;letter-spacing:.08em;
  color:var(--field-teal);
}
.index-block:hover{
  transform:translateY(-3px);
  border-color:var(--neon);
  box-shadow:var(--shadow-lift);
}
.index-title{
  font-family:var(--font-display);
  font-weight:800;font-size:19px;letter-spacing:-.01em;
  margin-bottom:6px;
}
.index-meta{font-size:14px;line-height:1.65;color:var(--mist);max-width:34em}

.card{
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,30px);
}
.panel{
  border:1px solid var(--line);
  border-radius:18px;
  background:#FFFFFF;
  overflow:hidden;
}
.panel + .panel{margin-top:12px}
.panel summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 22px;cursor:pointer;
  font-family:var(--font-display);font-weight:800;font-size:16px;
  color:var(--data-black);
  list-style:none;
}
.panel summary::-webkit-details-marker{display:none}
.panel summary::after{
  content:"+";
  font-family:var(--font-mono);font-size:19px;line-height:1;
  color:var(--field-teal);
  transition:transform .26s var(--ease-out),color .26s ease;
}
.panel[open] summary::after{transform:rotate(45deg);color:var(--ember)}
.panel-body{padding:0 22px 20px;font-size:15px;line-height:1.75;color:#2A4241}
.panel-body p{max-width:36em}

/* ===== 10 波形与斜切章节带 ===== */
.wave-block{
  position:relative;
  border-radius:var(--r-md);
  background:var(--ink-night);
  border:1px solid rgba(0,229,199,.22);
  padding:18px;
  overflow:hidden;
}
.wave-block svg{display:block;width:100%;height:auto}
.wave-line{
  fill:none;
  stroke:var(--neon);
  stroke-width:2;
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-dasharray:var(--wave-len,1400);
  stroke-dashoffset:0;
  transition:stroke-dashoffset 1.35s var(--ease-out) .15s;
}
[data-reveal]:not(.is-in) .wave-line{stroke-dashoffset:var(--wave-len,1400)}

.band-slant{
  position:relative;
  background:var(--ink-night);
  color:var(--paper);
  padding:clamp(38px,6vw,76px) 0;
  overflow:hidden;
}
.band-slant::before{
  content:"";
  position:absolute;left:0;right:0;top:0;
  height:clamp(22px,4.5vw,58px);
  background:var(--paper);
  clip-path:polygon(0 0,100% 0,0 100%);
  pointer-events:none;
}
.band-slant h2,.band-slant h3,.band-slant h4{color:var(--paper)}
.band-slant p{color:rgba(242,250,248,.78)}

/* ===== 11 图片容器基础规则 ===== */
.media-frame{
  position:relative;display:block;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:
    radial-gradient(120% 120% at 14% 8%,rgba(0,229,199,.32),transparent 58%),
    linear-gradient(152deg,var(--mid-teal),var(--ink-night));
  aspect-ratio:16/10;
  isolation:isolate;
}
.media-frame img,
.media-frame svg,
.media-frame picture{display:block;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-layer{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,42,43,0) 38%,rgba(6,42,43,.78) 100%);
}
.media-caption{
  position:absolute;left:18px;right:18px;bottom:15px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;
  color:rgba(242,250,248,.88);
}

/* ===== 12 正文与面包屑 ===== */
.prose{max-width:38em;font-size:17px;line-height:1.78;color:#1B302F}
.prose > * + *{margin-top:1.1em}
.prose h2{margin-top:1.9em;font-size:clamp(22px,2.4vw,28px)}
.prose h3{margin-top:1.6em;font-size:19px}
.prose ul,.prose ol{padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose a{color:var(--field-teal);font-weight:600}
.prose strong{color:var(--ink-deep)}

.crumbs{padding-top:20px}
.crumbs-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.crumbs-list a{color:var(--field-teal);text-decoration:none}
.crumbs-list a:hover{color:var(--ink-deep);text-decoration:underline}
.crumb-sep{color:var(--line)}
.crumbs-list [aria-current="page"]{color:var(--data-black)}

/* ===== 13 滚动显现 ===== */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease-out),transform .55s var(--ease-out);
  transition-delay:calc(var(--reveal-i,0) * 60ms);
  will-change:opacity,transform;
}
[data-reveal].is-in{opacity:1;transform:none}

/* ===== 14 响应式 ===== */
@media (max-width:1120px){
  .nav-link{padding:7px 11px;font-size:13.5px}
  .nav-cta{padding:9px 15px;font-size:13px}
}
@media (max-width:980px){
  .header-rail{min-height:66px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    margin-left:0;
    display:flex;flex-direction:column;align-items:stretch;gap:16px;
    background:var(--ink-night);
    border-top:1px solid rgba(0,229,199,.2);
    border-bottom:1px solid rgba(0,229,199,.32);
    padding:0 var(--pad-x);
    max-height:0;overflow:hidden;
    visibility:hidden;opacity:0;
    transition:max-height .34s var(--ease-out),opacity .22s ease,visibility .22s ease,padding .3s var(--ease-out);
  }
  .site-nav[data-open]{
    max-height:calc(100vh - 66px);
    overflow-y:auto;
    visibility:visible;opacity:1;
    padding:18px var(--pad-x) 26px;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .nav-link{
    justify-content:space-between;width:100%;
    padding:13px 16px;border-radius:14px;font-size:16px;
  }
  .nav-link::after{
    content:"→";
    font-family:var(--font-mono);font-size:14px;
    color:var(--neon);opacity:.55;
  }
  .nav-link[aria-current="page"]::after{color:var(--ink-night);opacity:.8}
  .nav-cta{width:100%;justify-content:center;padding:14px 20px;font-size:15px}
  .site-header.is-condensed .nav-link{padding:13px 16px;font-size:16px}
  .site-header.is-condensed .header-ticker{display:none}

  .grid--2,.grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .footer-inner{grid-template-columns:minmax(0,1fr);gap:34px}
  .footer-map{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:620px){
  body{font-size:16px}
  .brand-tagline{display:none}
  .nav-toggle{padding:8px 12px;font-size:11px}
  .footer-map{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-base-inner{flex-direction:column;align-items:flex-start;gap:8px}
  .index-block{padding:20px 18px 20px 18px}
  .index-block::before{position:static;display:block;margin-bottom:8px}
  .footer-contact-row{grid-template-columns:minmax(0,1fr);gap:2px}
}

/* ===== 15 减弱动效 ===== */
@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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .wave-line{stroke-dashoffset:0 !important}
  .header-progress{transition:none}
}