/* ============================================================
   易倍赛场 · 共享 Site Kit  /assets/site.css
   01 变量与重置  02 中文排版  03 工具类  04 按钮
   05 头部        06 导航抽屉  07 页脚    08 内容组件
   09 图片容器    10 显现动效  11 响应式与降级
   ============================================================ */

/* ---------- 01 变量与重置 ---------- */
:root{
  --ink:#0B2A24;
  --ink-2:#123B33;
  --ink-3:#0E3129;
  --cyan:#2FF3D0;
  --cyan-soft:#8FFCE8;
  --amber:#F2B84B;
  --sand:#E8E4DC;
  --sand-2:#CFC9BE;
  --charcoal:#101614;
  --paper:#F7FAF8;
  --steel:#6F8F87;

  --line-dark:rgba(143,252,232,.16);
  --line-light:rgba(16,22,20,.14);

  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --maxw:1240px;
  --gutter:clamp(18px,4vw,56px);
  --cut:14px;
  --ease:cubic-bezier(.22,.68,.24,1);
  --dur:.32s;
}

*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:130px;
}
body{
  margin:0;
  background:var(--paper);
  color:var(--charcoal);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;}
button{font:inherit;color:inherit;background:none;border:0;}
::selection{background:var(--cyan);color:var(--ink);}

/* ---------- 02 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  color:var(--ink);
}
h1{font-size:clamp(32px,5vw,72px);line-height:1.05;}
h2{font-size:clamp(24px,3.4vw,42px);}
h3{font-size:clamp(19px,2vw,26px);line-height:1.28;letter-spacing:-.01em;}
h4{font-size:clamp(16px,1.4vw,19px);line-height:1.4;letter-spacing:0;}
p{max-width:68ch;}
strong{font-weight:700;color:var(--ink);}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

/* ---------- 03 工具类 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(32px,5vw,72px);}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;
  letter-spacing:.2em;
  color:var(--steel);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:26px;height:2px;
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 100%,7px 100%);
}
.rule{
  height:1px;border:0;margin-block:clamp(20px,3vw,36px);
  background:var(--line-light);
}
.rule--dark{background:var(--line-dark);}

/* ---------- 04 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;
  font-family:var(--font-body);
  font-size:14px;font-weight:700;letter-spacing:.03em;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--solid{background:var(--cyan);color:var(--ink);}
.btn--solid:hover{background:var(--cyan-soft);transform:translateY(-2px);}
.btn--amber{background:var(--amber);color:var(--ink);}
.btn--amber:hover{background:#F7CE7E;transform:translateY(-2px);}
.btn--ghost{background:transparent;color:var(--paper);border-color:rgba(143,252,232,.45);}
.btn--ghost:hover{background:rgba(47,243,208,.12);color:var(--cyan-soft);transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--amber);outline-offset:-5px;}

/* ---------- 05 头部 ---------- */
.skip-link{
  position:fixed;
  left:clamp(12px,3vw,24px);
  top:-90px;
  z-index:200;
  padding:12px 20px;
  font-size:14px;font-weight:700;
  text-decoration:none;
  background:var(--cyan);
  color:var(--ink);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink);
  color:var(--paper);
  box-shadow:0 1px 0 rgba(47,243,208,.16),0 20px 44px -34px rgba(11,42,36,.95);
}

.header-top{
  background:
    linear-gradient(102deg,rgba(47,243,208,.13) 0%,rgba(47,243,208,0) 42%),
    linear-gradient(90deg,var(--ink) 0%,var(--ink-2) 100%);
}
.header-top__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(10px,1.6vw,16px) var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
}

.brand{
  display:inline-flex;align-items:center;gap:11px;
  text-decoration:none;color:var(--paper);
  min-width:0;
}
.brand__mark{
  position:relative;
  width:32px;height:32px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--cyan) 0%,#1E9C87 58%,var(--amber) 100%);
  clip-path:polygon(0 0,100% 0,100% 64%,64% 100%,0 100%);
}
.brand__mark::after{
  content:"";
  position:absolute;right:5px;bottom:5px;
  width:8px;height:8px;
  background:var(--ink);
  clip-path:polygon(100% 0,100% 100%,0 100%);
}
.brand__text{display:grid;gap:3px;line-height:1.1;min-width:0;}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(16px,1.7vw,20px);
  letter-spacing:.05em;
}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(232,228,220,.72);
}

.header-top__meta{
  margin-left:auto;
  display:flex;align-items:center;
  gap:clamp(10px,1.6vw,22px);
}
.v4-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;letter-spacing:.12em;
  color:var(--cyan);
  border:1px solid rgba(47,243,208,.42);
  background:rgba(47,243,208,.08);
  clip-path:polygon(10px 0,100% 0,100% 100%,0 100%,0 10px);
  white-space:nowrap;
}
.v4-badge__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,243,208,.18);
}
.header-contact{
  font-size:13px;font-weight:600;
  color:var(--sand);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid rgba(47,243,208,.38);
  white-space:nowrap;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.header-contact:hover{color:var(--cyan-soft);border-color:var(--cyan);}
.header-contact:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}

.nav-toggle{
  display:none;
  align-items:center;gap:9px;
  margin-left:auto;
  padding:9px 14px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;
  color:var(--cyan);
  background:rgba(47,243,208,.08);
  border:1px solid rgba(47,243,208,.42);
  cursor:pointer;
  clip-path:polygon(9px 0,100% 0,100% 100%,0 100%,0 9px);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle__bars{
  display:block;width:16px;height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.nav-toggle__label{font-size:11px;letter-spacing:.14em;}
.nav-toggle[aria-expanded="true"]{
  background:var(--cyan);
  color:var(--ink);
  border-color:var(--cyan);
}
.nav-toggle:focus-visible{outline:2px solid var(--amber);outline-offset:2px;}

/* ---------- 06 导航与抽屉 ---------- */
.nav-bar{
  background:var(--ink-2);
  border-top:1px solid rgba(47,243,208,.14);
}
.nav-bar__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:0 var(--gutter);
  display:flex;
  align-items:center;
  gap:14px;
  min-height:54px;
}
.primary-nav{flex:1 1 auto;min-width:0;}
.nav-utility{display:none;}
.nav-list{display:flex;flex-wrap:wrap;gap:2px;}
.nav-item{display:block;}
.nav-link{
  position:relative;
  z-index:0;
  display:inline-block;
  padding:10px 18px;
  font-size:14px;font-weight:600;
  color:rgba(247,250,248,.84);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;inset:0;z-index:-1;
  background:transparent;
  clip-path:polygon(10px 0,100% 0,calc(100% - 10px) 100%,0 100%);
  transition:background var(--dur) var(--ease);
}
.nav-link:hover{color:var(--cyan-soft);}
.nav-link:hover::before{background:rgba(47,243,208,.15);}
.nav-link[aria-current="page"]{color:var(--ink);font-weight:700;}
.nav-link[aria-current="page"]::before{background:var(--cyan);}
.nav-link:focus-visible{outline:2px solid var(--amber);outline-offset:2px;color:var(--cyan-soft);}
.nav-link[aria-current="page"]:focus-visible{color:var(--ink);}

.nav-cta{
  margin-left:auto;
  flex:0 0 auto;
  padding:9px 18px;
  font-size:13px;font-weight:700;
  text-decoration:none;
  color:var(--ink);
  background:var(--amber);
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background var(--dur) var(--ease);
}
.nav-cta:hover{background:#F7CE7E;}
.nav-cta:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:-5px;}

/* ---------- 07 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,104px);
  padding:clamp(30px,4vw,56px) var(--gutter) clamp(20px,3vw,32px);
  background:
    linear-gradient(180deg,rgba(11,42,36,1) 0%,rgba(11,42,36,1) 100%);
  color:var(--sand);
  border-top:1px solid rgba(47,243,208,.24);
}
.footer-panel{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(22px,3.4vw,44px) clamp(20px,3vw,40px) clamp(18px,2.4vw,28px);
  background:linear-gradient(155deg,rgba(18,59,51,.97) 0%,rgba(11,42,36,.92) 68%);
  border:1px solid rgba(47,243,208,.14);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr .85fr 1.15fr 1fr;
  gap:clamp(20px,3.4vw,44px);
  align-items:start;
}
.footer-block{min-width:0;}
.footer-title{
  display:flex;align-items:center;gap:10px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;letter-spacing:.2em;
  color:var(--cyan);
  line-height:1.4;
}
.footer-title::after{
  content:"";
  flex:1 1 auto;height:1px;min-width:16px;
  background:linear-gradient(90deg,rgba(47,243,208,.45),rgba(47,243,208,0));
}
.footer-brand{
  font-family:var(--font-display);
  font-size:clamp(19px,2vw,24px);
  font-weight:800;
  letter-spacing:.04em;
  color:var(--paper);
  max-width:none;
}
.footer-brand-sub{
  margin-top:7px;
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.2em;
  color:var(--amber);
  text-transform:uppercase;
  max-width:none;
}
.footer-note{
  margin-top:14px;
  font-size:13px;line-height:1.85;
  color:rgba(232,228,220,.72);
  max-width:34ch;
}
.footer-note--tight{
  margin-top:12px;
  font-size:12px;line-height:1.75;
  color:rgba(232,228,220,.6);
  max-width:36ch;
}
.footer-list{display:grid;gap:9px;}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:rgba(232,228,220,.8);
  text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan-soft);transform:translateX(4px);}
.footer-link:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}

.footer-contact{display:grid;gap:11px;}
.footer-contact__row{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.footer-contact__row dt{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.16em;
  color:var(--steel);
  text-transform:uppercase;
}
.footer-contact__row dd{
  font-size:13px;line-height:1.6;
  color:rgba(232,228,220,.88);
  overflow-wrap:anywhere;
}
.footer-icp{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;
  color:var(--steel);
  max-width:none;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 22px;
  margin-top:clamp(24px,4vw,40px);
  padding-top:18px;
  border-top:1px solid rgba(207,201,190,.18);
}
.footer-legal__copy,
.footer-legal__meta{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.08em;
  color:var(--steel);
  max-width:none;
}

/* ---------- 08 内容组件 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.12em;
  color:var(--steel);
}
.breadcrumb a{color:var(--steel);text-decoration:none;transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb a:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}
.breadcrumb__sep{color:rgba(111,143,135,.6);}
.breadcrumb [aria-current="page"]{color:var(--ink);}

.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--index{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  background:var(--paper);
  border:1px solid var(--line-light);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
}
.panel--dark{
  background:var(--ink-2);
  border-color:var(--line-dark);
  color:var(--sand);
}
.panel--dark h2,.panel--dark h3,.panel--dark h4{color:var(--paper);}

.data-strip{display:grid;gap:8px;}
.data-strip__row{
  display:grid;
  grid-template-columns:minmax(64px,auto) minmax(0,1fr) auto;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
}
.data-strip__track{
  position:relative;
  height:8px;
  background:rgba(16,22,20,.1);
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,calc(100% - 5px) 100%,0 100%);
}
.panel--dark .data-strip__track,
.media-frame .data-strip__track{background:rgba(143,252,232,.16);}
.data-strip__fill{
  position:absolute;
  inset:0 auto 0 0;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-soft));
  transform-origin:left center;
}
.data-strip__fill--amber{background:linear-gradient(90deg,var(--amber),#F7D08A);}

/* ---------- 09 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(140deg,var(--ink-2),var(--ink));
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);
}
.media-frame img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.86) contrast(1.06) brightness(.96);
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(115deg,rgba(143,252,232,.06) 0 1px,transparent 1px 7px),
    linear-gradient(200deg,rgba(47,243,208,.18) 0%,rgba(11,42,36,.42) 60%,rgba(11,42,36,.72) 100%);
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame__label{
  position:absolute;
  left:14px;bottom:14px;
  z-index:1;
  padding:6px 11px;
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.18em;
  color:var(--ink);
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,calc(100% - 7px) 100%,0 100%);
}

/* ---------- 10 显现动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
  will-change:opacity,transform;
}
[data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 11 响应式与降级 ---------- */
@media (max-width:1024px){
  .grid--split{grid-template-columns:minmax(0,1fr);}
  .grid--thirds{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:900px){
  html{scroll-padding-top:96px;}
  .header-top__meta{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-bar{display:none;}
  .site-header[data-open] .nav-bar{display:block;}
  .site-header[data-open]{box-shadow:0 28px 64px -24px rgba(11,42,36,.8);}
  .nav-bar__inner{
    flex-direction:column;
    align-items:stretch;
    gap:16px;
    min-height:0;
    padding:16px var(--gutter) 24px;
  }
  .nav-utility{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px;
    padding-bottom:14px;
    border-bottom:1px solid rgba(47,243,208,.18);
  }
  .nav-utility__link{
    font-size:13px;font-weight:600;
    color:var(--sand);
    text-decoration:none;
    padding-bottom:2px;
    border-bottom:1px solid rgba(47,243,208,.42);
  }
  .nav-utility__link:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}
  .nav-list{flex-direction:column;gap:5px;}
  .nav-link{
    display:block;
    padding:13px 16px;
    font-size:15px;
    border:1px solid rgba(143,252,232,.14);
  }
  .nav-link::before{
    clip-path:polygon(0 0,100% 0,100% 100%,calc(100% - 14px) 100%,0 calc(100% - 14px));
  }
  .nav-cta{
    margin-left:0;
    text-align:center;
    padding:14px 18px;
    font-size:14px;
  }
}

@media (max-width:640px){
  body{font-size:15px;}
  .grid--halves,.grid--thirds{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .footer-contact__row{grid-template-columns:40px minmax(0,1fr);}
  .footer-legal{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion: reduce){
  *,*::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;}
  .footer-link:hover,.btn:hover{transform:none !important;}
}