/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid rgba(157,179,174,.28);margin:0}

/* ===== 设计令牌 ===== */
:root{
  --ink:#061712;
  --ink-soft:#0A1F19;
  --panel:#0B2238;
  --paper:#F4ECD9;
  --brown:#1A1410;
  --orange:#FF6B2C;
  --orange-soft:#FF8A55;
  --cyan:#35E0CE;
  --amber:#FFC857;
  --blue:#5AB0FF;
  --violet:#A78BFA;
  --lime:#C9F26B;
  --mist:#9DB3AE;
  --alert:#FF5A5F;
  --rule:rgba(157,179,174,.28);
  --rule-soft:rgba(157,179,174,.16);
  --rule-strong:rgba(157,179,174,.52);
  --font-display:"Oswald","Barlow Condensed","PingFang SC","Noto Sans SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell:1280px;
  --gutter:20px;
  --radius:18px;
  --shadow-soft:0 22px 46px -30px rgba(0,0,0,.92);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== 中文排版与全局底色 ===== */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.78;
  font-weight:400;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 88% -12%, rgba(53,224,206,.10), transparent 62%),
    radial-gradient(880px 520px at -12% 6%, rgba(255,107,44,.09), transparent 58%),
    linear-gradient(180deg, rgba(11,34,56,.55) 0%, rgba(6,23,18,0) 42%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.04;letter-spacing:-.012em;text-wrap:balance}
h4{line-height:1.2;letter-spacing:0}
p{text-wrap:pretty}
strong{font-weight:600;color:#fff}
::selection{background:var(--orange);color:var(--brown)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ===== 跳转链接 ===== */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:12px 20px;border-radius:999px;
  background:var(--orange);color:var(--brown);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  transform:translateY(-160%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);outline:2px solid var(--cyan);outline-offset:3px}

/* ===== 焦点状态 ===== */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
a:focus:not(:focus-visible){outline:none}

/* ===== 头部：悬浮胶囊浮岛 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  color:var(--paper);
  background:linear-gradient(180deg, rgba(6,23,18,.97) 0%, rgba(6,23,18,.86) 100%);
  border-bottom:1px solid var(--rule-soft);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  transition:box-shadow .25s var(--ease),background-color .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 18px 40px -34px rgba(0,0,0,.95);background:linear-gradient(180deg, rgba(6,23,18,.99) 0%, rgba(8,26,21,.94) 100%)}
.header-shell{
  position:relative;
  width:min(var(--shell),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:center;
  column-gap:18px;
  min-height:74px;
  padding-block:11px;
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;min-height:44px;border-radius:10px}
.brand-mark{
  display:grid;place-items:center;
  width:42px;height:42px;flex:0 0 42px;
  padding-left:3px;
  font-family:var(--font-display);
  font-size:14px;font-weight:700;line-height:1;letter-spacing:-.04em;
  color:var(--brown);
  background:linear-gradient(140deg,var(--orange) 0%,var(--amber) 100%);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
  transition:transform .22s var(--ease);
}
.brand:hover .brand-mark{transform:translateY(-1px) rotate(-2deg)}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{font-family:var(--font-display);font-size:18px;font-weight:700;letter-spacing:.01em;line-height:1.1;color:var(--paper);white-space:nowrap}
.brand-tag{font-size:11px;line-height:1.3;letter-spacing:.14em;color:var(--mist);white-space:nowrap}

/* 移动按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  justify-self:end;
  min-height:42px;padding:8px 14px;
  border:1px solid var(--rule);border-radius:999px;
  background:rgba(11,34,56,.6);
  color:var(--paper);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bar{width:16px;height:2px;border-radius:2px;background:currentColor;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
.nav-toggle-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase}

/* 胶囊导航 */
.site-nav{
  justify-self:end;
  display:flex;align-items:center;gap:8px;
  max-width:100%;
  padding:6px;
  border:1px solid var(--rule);
  border-radius:999px;
  background:rgba(11,34,56,.72);
  box-shadow:var(--shadow-soft);
}
.nav-list{display:flex;align-items:center;gap:2px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-list::-webkit-scrollbar{display:none}
.nav-item{flex:0 0 auto}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  min-height:38px;padding:8px 14px;
  border-radius:999px;
  font-size:14px;font-weight:500;letter-spacing:.02em;
  color:rgba(244,236,217,.8);
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(53,224,206,.10)}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:3px;
  width:0;height:2px;border-radius:2px;background:var(--orange);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link[aria-current="page"]{color:var(--paper);background:rgba(255,107,44,.14)}
.nav-link[aria-current="page"]::after{width:16px}
.nav-actions{display:flex;align-items:center;gap:8px;padding-left:8px;border-left:1px solid var(--rule)}

/* 滚动进度 */
.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(157,179,174,.12);pointer-events:none}
.scroll-progress-bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--orange) 0%,var(--amber) 45%,var(--cyan) 100%);transition:width .12s linear}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:40px;padding:10px 20px;
  border:1px solid transparent;border-radius:999px;
  font-family:var(--font-body);font-size:14px;font-weight:600;letter-spacing:.02em;line-height:1.2;
  white-space:nowrap;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--orange);color:var(--brown);box-shadow:0 12px 26px -18px rgba(255,107,44,.9)}
.btn-primary:hover{background:var(--orange-soft);color:var(--brown)}
.btn-ghost{background:transparent;border-color:rgba(244,236,217,.26);color:var(--paper)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-line{background:transparent;border-color:var(--orange);color:var(--orange)}
.btn-line:hover{background:rgba(255,107,44,.12)}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,7vw,96px);
  color:var(--paper);
  background-color:var(--panel);
  background-image:
    radial-gradient(760px 380px at 92% 0%, rgba(53,224,206,.14), transparent 62%),
    radial-gradient(680px 340px at 4% 100%, rgba(255,107,44,.12), transparent 60%),
    linear-gradient(180deg, rgba(6,23,18,.96) 0%, rgba(11,34,56,.96) 46%, rgba(6,23,18,.99) 100%);
  border-top:1px solid var(--rule);
}
.footer-ghost{
  position:absolute;right:-8px;bottom:32px;z-index:0;
  font-family:var(--font-display);font-weight:700;line-height:.8;letter-spacing:-.05em;
  font-size:clamp(72px,15vw,190px);
  color:rgba(244,236,217,.035);
  pointer-events:none;user-select:none;
}
.footer-ticker{
  display:flex;align-items:center;gap:26px;
  padding:12px max(var(--gutter),calc((100% - var(--shell)) / 2));
  border-bottom:1px solid var(--rule-soft);
  overflow-x:auto;scrollbar-width:none;
  background:rgba(6,23,18,.5);
}
.footer-ticker::-webkit-scrollbar{display:none}
.footer-ticker-item{
  display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mist);white-space:nowrap;
}
.footer-ticker-item::before{content:"";width:5px;height:5px;border-radius:1px;background:var(--cyan);transform:rotate(45deg)}
.footer-shell{
  position:relative;z-index:1;
  width:min(var(--shell),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1.55fr) minmax(0,.95fr);
  gap:clamp(24px,3.4vw,52px);
  padding-block:clamp(34px,4.4vw,64px) clamp(26px,3vw,44px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.footer-brand-link{
  font-family:var(--font-display);font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.1;
  letter-spacing:-.01em;color:var(--paper);
  border-bottom:2px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.footer-brand-link:hover{color:var(--cyan);border-bottom-color:var(--orange)}
.footer-brand-copy{font-size:14px;line-height:1.8;color:var(--mist);max-width:34ch}
.footer-brand-meta{font-size:12px;letter-spacing:.06em;color:rgba(157,179,174,.8)}
.footer-cta{margin-top:2px}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2vw,30px)}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--amber);margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  position:relative;display:inline-block;
  font-size:14px;line-height:1.6;color:rgba(244,236,217,.82);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link::before{
  content:"";position:absolute;left:-12px;top:50%;width:5px;height:1px;
  background:var(--orange);opacity:0;transition:opacity .18s var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-link:hover::before{opacity:1}
.footer-contact{min-width:0}
.footer-contact-list{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}
.footer-contact-item{display:flex;flex-direction:column;gap:3px}
.footer-contact-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:rgba(157,179,174,.72)}
.footer-contact-value{font-size:13px;line-height:1.65;color:var(--paper);word-break:break-word}
.footer-service-note{
  font-size:12px;line-height:1.75;color:rgba(157,179,174,.82);
  padding-top:14px;border-top:1px solid var(--rule-soft);
}
.footer-bottom{
  position:relative;z-index:1;
  width:min(var(--shell),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 26px;
  padding-block:18px 26px;
  border-top:1px solid var(--rule);
}
.footer-legal{font-size:12px;line-height:1.7;color:rgba(157,179,174,.86)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.footer-legal-links .footer-link{font-size:12px}
.footer-year{margin-left:auto;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(157,179,174,.72)}

/* ===== 页面级通用组件 ===== */
.shell{width:min(var(--shell),calc(100% - (var(--gutter) * 2)));margin-inline:auto}
.section{padding-block:clamp(34px,5vw,76px)}
.section-head{display:flex;flex-direction:column;gap:12px;margin-bottom:clamp(20px,3vw,36px);max-width:62ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orange)}
.display-1{font-size:clamp(44px,7vw,96px);letter-spacing:-.03em;line-height:.98}
.display-2{font-size:clamp(30px,4vw,52px);letter-spacing:-.02em;line-height:1.04}
.lead{font-size:clamp(16px,1.5vw,18px);line-height:1.8;color:rgba(244,236,217,.82);max-width:62ch}

/* 标签编码 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  border:1px solid currentColor;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;line-height:1.6;
  white-space:nowrap;
}
.tag--amber{color:var(--amber)}
.tag--blue{color:var(--blue)}
.tag--violet{color:var(--violet)}
.tag--lime{color:var(--lime)}
.tag--cyan{color:var(--cyan)}
.tag--orange{color:var(--orange)}
.tag--alert{color:var(--alert)}

/* 筛选片 */
.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:38px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--rule);
  background:rgba(11,34,56,.55);
  color:rgba(244,236,217,.86);
  font-size:13px;font-weight:500;letter-spacing:.02em;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.chip:hover{border-color:var(--cyan);color:var(--cyan)}
.chip[aria-pressed="true"],.chip.is-active{border-color:var(--orange);background:rgba(255,107,44,.16);color:var(--paper)}

/* 面包屑 */
.breadcrumb{font-size:12px;letter-spacing:.04em;color:var(--mist)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(157,179,174,.5)}
.breadcrumb a:hover{color:var(--cyan)}

/* 面板与长文阅读区 */
.panel{
  background:linear-gradient(160deg, rgba(11,34,56,.92) 0%, rgba(6,23,18,.94) 100%);
  border:1px solid var(--rule);border-radius:var(--radius);
  box-shadow:var(--shadow-soft);
}
.prose{
  background:var(--paper);color:var(--brown);
  border-radius:var(--radius);
  padding:clamp(22px,4vw,54px);
  font-size:clamp(15px,1.2vw,17px);line-height:1.9;
}
.prose h2,.prose h3{color:var(--brown);margin-block:1.4em .6em}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose p+p{margin-top:1em}
.prose ul,.prose ol{margin-block:1em;padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.4em}
.prose a{color:#B4461A;border-bottom:1px solid rgba(180,70,26,.35)}
.prose a:hover{border-bottom-color:#B4461A}
.prose strong{color:var(--brown);font-weight:600}

/* 图片容器基础规则 */
.media{
  position:relative;overflow:hidden;
  border:1px solid var(--rule);border-radius:16px;
  background-color:var(--panel);
  background-image:
    repeating-linear-gradient(90deg, rgba(157,179,174,.12) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(0deg, rgba(157,179,174,.08) 0 1px, transparent 1px 26px),
    radial-gradient(120% 90% at 78% 10%, rgba(53,224,206,.20), transparent 62%),
    linear-gradient(150deg, rgba(255,107,44,.16), rgba(6,23,18,.9));
  box-shadow:var(--shadow-soft);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--3x2{aspect-ratio:3/2}
.media--4x5{aspect-ratio:4/5}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--wide{aspect-ratio:21/9}

/* 12 列非对称网格 */
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
@media (min-width:861px){
  .span-3{grid-column:span 3}
  .span-4{grid-column:span 4}
  .span-5{grid-column:span 5}
  .span-6{grid-column:span 6}
  .span-7{grid-column:span 7}
  .span-8{grid-column:span 8}
  .span-9{grid-column:span 9}
  .span-12{grid-column:span 12}
  .start-2{grid-column-start:2}
  .start-6{grid-column-start:6}
  .start-7{grid-column-start:7}
}
@media (max-width:860px){
  .grid-12>*{grid-column:1 / -1}
}

/* 时间轴基础 */
.timeline{position:relative;display:flex;flex-direction:column;gap:0;border-left:1px solid var(--rule)}
.timeline-item{position:relative;padding:0 0 clamp(18px,2.4vw,30px) clamp(20px,2.6vw,34px)}
.timeline-item:last-child{padding-bottom:0}
.timeline-dot{
  position:absolute;left:-5px;top:8px;
  width:9px;height:9px;border-radius:2px;
  background:var(--cyan);transform:rotate(45deg);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.timeline-item:hover .timeline-dot{background:var(--orange);box-shadow:0 0 0 4px rgba(255,107,44,.16)}
.timeline-time{
  display:inline-block;margin-bottom:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--orange);
}

/* 显现动效 */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== 平板 ===== */
@media (max-width:1100px){
  .site-nav{gap:4px}
  .nav-link{padding:8px 11px;font-size:13px}
  .nav-actions .btn{padding:9px 14px;font-size:13px}
  .footer-shell{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);row-gap:32px}
  .footer-contact{grid-column:1 / -1}
}

/* ===== 移动端导航 ===== */
@media (max-width:900px){
  :root{--gutter:16px}
  .header-shell{grid-template-columns:1fr auto;min-height:64px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:12px;
    padding:14px;
    border-radius:20px;
    background:rgba(8,26,21,.98);
    border:1px solid var(--rule-strong);
    box-shadow:0 28px 60px -32px rgba(0,0,0,.95);
    max-height:min(74vh,560px);overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-8px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .site-nav[data-open]{
    opacity:1;visibility:visible;pointer-events:auto;
    transform:translateY(0);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;overflow:visible}
  .nav-item{flex:1 1 auto}
  .nav-link{display:flex;justify-content:flex-start;width:100%;min-height:46px;padding:11px 16px;border-radius:12px;font-size:15px}
  .nav-link::after{left:16px;bottom:9px;transform:none;width:0}
  .nav-link[aria-current="page"]::after{width:18px}
  .nav-actions{flex-direction:row;flex-wrap:wrap;gap:10px;padding:12px 0 0;border-left:0;border-top:1px solid var(--rule)}
  .nav-actions .btn{flex:1 1 140px;min-height:44px;font-size:14px}
  .brand-tag{display:none}
  .footer-shell{grid-template-columns:1fr;gap:30px;padding-block:34px 26px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-contact{grid-column:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-year{margin-left:0}
  .footer-ghost{font-size:clamp(64px,22vw,120px);bottom:18px}
}

@media (max-width:480px){
  .brand-name{font-size:16px}
  .brand-mark{width:38px;height:38px;flex-basis:38px;font-size:13px}
  .footer-cols{grid-template-columns:1fr}
  .footer-ticker{gap:18px}
}

/* ===== 动效降级 ===== */
@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;transform:none}
  .scroll-progress-bar{transition:none}
}