/* ==========================================================================
   开云体育 · 共享外壳 Site Kit
   深空墨蓝蓝图底 / 电光青 · 熔岩橙对撞 / 纸张叠层印刷标签
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg{display:block;max-width:100%}

:root{
  --ink:#0B1B2B;
  --ink-raise:#102537;
  --ink-deep:#071320;
  --cloud:#F4F7FA;
  --cyan:#19E3D1;
  --cyan-soft:#8FF7EE;
  --orange:#FF6B2C;
  --graphite:#2A3138;
  --graphite-2:#343C45;
  --gold:#E8B45A;
  --mist:#7FA8B8;
  --paper:#E9EDF2;
  --teal:#0E6F73;

  --font-display:"PingFang SC","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;

  --line:rgba(127,168,184,.26);
  --line-strong:rgba(127,168,184,.5);
  --line-ink:rgba(11,27,43,.2);

  --sp-1:8px;--sp-2:16px;--sp-3:24px;--sp-4:32px;--sp-5:48px;--sp-6:64px;--sp-7:96px;

  --shell:1320px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms;
}

/* ---------- 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--cloud);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(127,168,184,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(127,168,184,.07) 1px,transparent 1px);
  background-size:72px 72px;
  background-position:center top;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.18;letter-spacing:.01em}
h1{font-size:clamp(30px,4.6vw,72px);font-weight:900;font-style:italic;letter-spacing:-.01em}
h2{font-size:clamp(24px,3.2vw,48px);font-weight:800}
h3{font-size:clamp(18px,2vw,24px)}
p{max-width:72ch}

::selection{background:rgba(25,227,209,.3);color:var(--cloud)}

a,.btn,.nav-link,.copy-btn,.to-top,.brand-mark{transition:color var(--t) var(--ease),background-color var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease),transform var(--t) var(--ease)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
#main-content:focus-visible{outline:2px solid var(--cyan);outline-offset:8px}

/* ---------- 桌面端视口画框 ---------- */
@media (min-width:1024px){
  body::after{
    content:"";
    position:fixed;
    inset:16px;
    border:1px solid rgba(127,168,184,.15);
    pointer-events:none;
    z-index:70;
  }
}

/* ---------- 通用工具 ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--sp-3)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform var(--t) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ==========================================================================
   页头：导航框梁
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(180deg,rgba(11,27,43,.99) 0%,rgba(15,33,52,.95) 100%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(25,227,209,.16),0 10px 30px rgba(4,10,18,.35);
}

.scroll-meter{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  overflow:hidden;
  z-index:2;
}
.scroll-meter-fill{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan-soft) 45%,var(--gold) 100%);
  transition:width 120ms linear;
}

.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:var(--sp-3);
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:14px var(--sp-3);
}

.brand-block{
  display:flex;
  align-items:center;
  gap:var(--sp-2);
  flex:1 1 auto;
  min-width:0;
}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  display:inline-grid;
  place-items:center;
  width:42px;height:42px;
  flex:0 0 auto;
  border:1px solid var(--cyan);
  color:var(--cyan);
  background:rgba(25,227,209,.08);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
}
.brand:hover .brand-mark{background:var(--cyan);color:var(--ink);box-shadow:4px 4px 0 rgba(25,227,209,.22)}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  font-style:italic;
  letter-spacing:.06em;
  color:var(--cloud);
}
.brand-line{
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}
.brand-tagline{
  padding-left:12px;
  border-left:1px solid rgba(232,180,90,.45);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gold);
  white-space:nowrap;
}

/* 移动按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:9px 12px;
  border:1px solid var(--line-strong);
  color:var(--cloud);
  background:rgba(16,37,55,.6);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:4px;width:18px}
.nav-bar{display:block;height:2px;background:currentColor;transition:transform var(--t) var(--ease),opacity var(--t) var(--ease)}
.nav-toggle-text{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em}
.nav-toggle[aria-expanded="true"] .nav-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 导航带 */
.primary-nav{
  display:flex;
  align-items:center;
  gap:var(--sp-3);
  margin-left:auto;
}
.nav-list{
  display:flex;
  align-items:stretch;
  counter-reset:navidx;
  border:1px solid var(--line);
  background:rgba(244,247,250,.03);
}
.nav-list li{display:flex;counter-increment:navidx}
.nav-list li+li .nav-link{border-left:1px solid var(--line)}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 15px;
  font-size:14px;
  letter-spacing:.06em;
  color:rgba(244,247,250,.82);
}
.nav-link::before{
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.04em;
  color:var(--mist);
}
.nav-link:hover{color:var(--cyan);background:rgba(25,227,209,.08)}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(25,227,209,.1);
  box-shadow:inset 0 -2px 0 0 var(--cyan);
}
.nav-link[aria-current="page"]::before{color:var(--cyan)}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 18px;
  border:1px solid var(--orange);
  color:var(--orange);
  background:rgba(255,107,44,.06);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  white-space:nowrap;
}
.nav-cta::after{content:"→";font-family:var(--font-mono);font-size:13px;transition:transform var(--t) var(--ease)}
.nav-cta:hover{background:var(--orange);color:var(--ink);box-shadow:4px 4px 0 rgba(255,107,44,.26)}
.nav-cta:hover::after{transform:translateX(3px)}

@media (max-width:1180px){
  .nav-link{padding:10px 11px;font-size:13px}
  .brand-tagline{display:none}
}

@media (max-width:960px){
  .header-inner{padding:12px 18px;gap:12px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    left:0;right:0;top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    margin:0;
    padding:16px 18px 22px;
    max-height:calc(100vh - 84px);
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,27,43,.995) 0%,rgba(17,39,58,.995) 100%);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 24px 48px rgba(3,9,16,.6);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity var(--t) var(--ease),transform var(--t) var(--ease),visibility var(--t);
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{flex-direction:column;border:1px solid var(--line)}
  .nav-list li+li .nav-link{border-left:0;border-top:1px solid var(--line)}
  .nav-link{width:100%;padding:14px 16px;font-size:15px}
  .nav-link[aria-current="page"]{box-shadow:inset 2px 0 0 0 var(--cyan)}
  .nav-cta{justify-content:center;padding:13px 18px}
}

@media (max-width:520px){
  .brand-name{font-size:17px}
  .brand-line{font-size:10px;letter-spacing:.1em}
  .brand-mark{width:36px;height:36px;font-size:12px}
}

/* ==========================================================================
   页脚：石墨资料层 + 纸张叠层联系卡
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:var(--sp-7);
  background:linear-gradient(180deg,var(--graphite) 0%,#232930 100%);
  border-top:2px solid var(--gold);
  color:var(--cloud);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:5px;
  background:repeating-linear-gradient(90deg,rgba(232,180,90,.55) 0 22px,transparent 22px 44px);
  opacity:.4;
  pointer-events:none;
}
.footer-inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:56px var(--sp-3) 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.1fr .85fr .95fr 1.35fr;
  gap:var(--sp-4);
  align-items:start;
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.footer-mark{
  display:inline-grid;
  place-items:center;
  width:44px;height:44px;
  border:1px solid var(--gold);
  color:var(--gold);
  background:rgba(232,180,90,.08);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
}
.footer-name{
  margin-top:14px;
  font-family:var(--font-display);
  font-size:20px;
  font-weight:900;
  font-style:italic;
  letter-spacing:.06em;
  color:var(--cloud);
}
.footer-note{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:12px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(232,180,90,.32);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--gold);
}
.footer-col-title--ink{
  color:var(--teal);
  border-bottom-color:rgba(14,111,115,.35);
}
.footer-links{display:grid;gap:2px}
.footer-links a{
  display:block;
  padding:8px 0 8px 12px;
  border-left:2px solid transparent;
  font-size:14px;
  color:rgba(244,247,250,.8);
}
.footer-links a:hover,
.footer-links a:focus-visible{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(25,227,209,.07);
}

.footer-contact{
  padding:20px;
  background:var(--paper);
  color:var(--ink);
  border:1px solid var(--line-ink);
  box-shadow:8px 8px 0 rgba(232,180,90,.22);
}
.footer-contact :focus-visible{outline-color:var(--teal)}
.contact-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:6px 10px;
  align-items:center;
  padding:9px 0;
  border-bottom:1px dashed rgba(11,27,43,.18);
  font-size:13px;
}
.contact-row:last-child{border-bottom:0}
.contact-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--teal);
  white-space:nowrap;
}
.contact-value{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  color:var(--ink);
  word-break:break-word;
}
.copy-btn{
  padding:3px 9px;
  border:1px solid var(--teal);
  color:var(--teal);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  white-space:nowrap;
}
.copy-btn:hover{background:var(--teal);color:var(--paper)}
.copy-btn[data-copied="true"]{background:var(--teal);color:var(--paper);border-color:var(--teal)}

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-icp,.footer-copyright{margin:0;max-width:none}
.to-top{
  margin-left:auto;
  padding:6px 14px;
  border:1px solid var(--gold);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
}
.to-top:hover{background:var(--gold);color:var(--ink)}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-4)}
  .footer-contact{grid-column:1 / -1;box-shadow:6px 6px 0 rgba(232,180,90,.2)}
}
@media (max-width:600px){
  .site-footer{margin-top:var(--sp-6)}
  .footer-inner{padding:44px 18px 20px}
  .footer-grid{grid-template-columns:1fr;gap:var(--sp-3)}
  .footer-meta{margin-top:32px;gap:10px}
  .to-top{margin-left:0;width:100%;text-align:center}
}

/* ==========================================================================
   通用区块与页面组件
   ========================================================================== */
.section{padding:var(--sp-6) 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:var(--sp-2);
  margin-bottom:var(--sp-4);
  padding-bottom:var(--sp-2);
  border-bottom:1px solid var(--line);
}
.section-index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  padding:3px 9px;
  color:var(--cyan);
  border:1px solid rgba(25,227,209,.45);
  background:rgba(25,227,209,.08);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,40px);
  font-weight:900;
  font-style:italic;
  line-height:1.1;
  letter-spacing:.01em;
  color:var(--cloud);
}
.section-lede{
  max-width:64ch;
  font-size:15.5px;
  line-height:1.85;
  color:rgba(244,247,250,.72);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--mist);
}

/* 面包屑 */
.breadcrumb{margin:var(--sp-3) 0 0}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(127,168,184,.55)}
.breadcrumb a{color:rgba(244,247,250,.78);border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--gold)}

/* 非对称分栏 */
.layout-split{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:var(--sp-5);
  align-items:start;
}
.rail{
  position:sticky;
  top:96px;
  padding:var(--sp-2);
  border:1px solid var(--line);
  background:rgba(16,37,55,.62);
}

/* 12 栏网格 */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--sp-3);
}
.span-4{grid-column:span 4}
.span-6{grid-column:span 6}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

@media (max-width:900px){
  .layout-split{grid-template-columns:1fr;gap:var(--sp-4)}
  .rail{position:static}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-4,.span-6,.span-8{grid-column:span 6}
}
@media (max-width:600px){
  .section{padding:var(--sp-5) 0}
  .grid-12{grid-template-columns:1fr}
  .span-4,.span-6,.span-8,.span-12{grid-column:span 1}
}

/* 卡片 */
.card{
  position:relative;
  padding:var(--sp-3);
  border:1px solid var(--line);
  background:rgba(16,37,55,.72);
  transition:border-color var(--t) var(--ease),background-color var(--t) var(--ease),transform var(--t) var(--ease);
}
.card:hover{border-color:rgba(25,227,209,.55);background:rgba(20,45,66,.86)}
.card--paper{
  background:var(--paper);
  color:var(--ink);
  border-color:var(--line-ink);
  box-shadow:8px 8px 0 rgba(11,27,43,.3);
}
.card--graphite{
  background:var(--graphite-2);
  border-color:rgba(127,168,184,.35);
}

/* 标签与数据 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid currentColor;
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
}
.tag--cyan{color:var(--cyan);background:rgba(25,227,209,.1)}
.tag--orange{color:var(--orange);background:rgba(255,107,44,.12)}
.tag--gold{color:var(--gold);background:rgba(232,180,90,.12)}
.data-chip{
  display:inline-block;
  padding:2px 8px;
  border:1px solid rgba(127,168,184,.32);
  background:rgba(127,168,184,.14);
  color:var(--cloud);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.rule{
  display:flex;
  align-items:center;
  gap:12px;
  margin:var(--sp-4) 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
}
.rule::after{content:"";flex:1;height:1px;background:var(--line)}

/* 图片容器基础 */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line-strong);
  background:linear-gradient(145deg,var(--ink-raise) 0%,#14304a 55%,rgba(14,111,115,.55) 100%);
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease)}
.media:hover img{transform:scale(1.02)}
.media--wide{aspect-ratio:21 / 9}
.media--square{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:3 / 4}
.media-tag{
  position:absolute;
  top:0;left:0;
  z-index:2;
  padding:4px 10px;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:rgba(11,27,43,.92);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}
.media-stack{position:relative}
.media-stack::before{
  content:"";
  position:absolute;
  inset:10px -10px -10px 10px;
  border:1px solid var(--line);
  background:rgba(233,237,242,.05);
  z-index:0;
}
.media-stack .media{position:relative;z-index:1}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  text-align:center;
}
.btn--primary{
  background:var(--orange);
  color:var(--ink);
  border-color:var(--orange);
  box-shadow:5px 5px 0 rgba(255,107,44,.24);
}
.btn--primary:hover{
  background:#ff824f;
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 rgba(255,107,44,.34);
}
.btn--ghost{
  background:rgba(25,227,209,.07);
  color:var(--cyan);
  border-color:var(--cyan);
}
.btn--ghost:hover{background:var(--cyan);color:var(--ink)}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .media:hover img{transform:none}
  .btn--primary:hover{transform:none}
}