/* ============ 必一赛事 · 共享外壳与基础组件 ============ */
:root{
  --ink-900:#071426;
  --ink-800:#0B1F3A;
  --ink-700:#12345A;
  --aqua:#17E0C0;
  --aqua-deep:#0C7F73;
  --flame:#FF6B35;
  --flame-deep:#C64D24;
  --paper:#F7F9FC;
  --mist:#A9B7CC;
  --steel:#5B7CA6;
  --line:rgba(169,183,204,.16);
  --line-soft:rgba(169,183,204,.10);
  --line-aqua:rgba(23,224,192,.42);
  --radius-xl:32px;
  --radius-lg:24px;
  --radius-md:16px;
  --pill:999px;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell-x:clamp(18px,5vw,40px);
  --header-h:86px;
  --ease:.22s cubic-bezier(.32,.72,.28,1);
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:110px;
}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-display);
  font-size:clamp(15px,1.05vw,17px);
  font-weight:500;
  line-height:1.78;
  color:var(--paper);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(1100px 560px at 84% -8%,rgba(23,224,192,.10),transparent 62%),
    radial-gradient(860px 520px at 2% 4%,rgba(255,107,53,.07),transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:900;line-height:1.12;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.06}
h2{font-size:clamp(1.55rem,2.8vw,2.3rem)}
h3{font-size:clamp(1.12rem,1.6vw,1.44rem);line-height:1.24}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--aqua);outline-offset:3px;border-radius:6px}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:50%;
  z-index:300;
  transform:translate(-50%,-180%);
  padding:.7rem 1.35rem;
  border-radius:var(--pill);
  background:var(--aqua);
  color:#04211D;
  font-size:.88rem;
  font-weight:800;
  letter-spacing:.02em;
  box-shadow:0 18px 34px -18px rgba(23,224,192,.95);
  transition:transform var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  padding:10px var(--shell-x) 0;
  background:linear-gradient(180deg,rgba(7,20,38,.99) 0%,rgba(7,20,38,.93) 66%,rgba(7,20,38,0) 100%);
}
.header-shell{
  position:relative;
  z-index:130;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  width:100%;
  max-width:1240px;
  margin:0 auto;
  min-height:64px;
  padding:6px 8px 6px 16px;
  border-radius:var(--pill);
  background:linear-gradient(115deg,rgba(18,52,90,.96) 0%,rgba(9,25,46,.97) 58%,rgba(12,38,64,.96) 100%);
  border:1px solid rgba(169,183,204,.18);
  box-shadow:0 22px 46px -32px rgba(0,0,0,.95);
}
.header-shell::after{
  content:"";
  position:absolute;
  left:26px;right:26px;top:0;
  height:1px;
  border-radius:2px;
  background:linear-gradient(90deg,transparent,rgba(23,224,192,.6),rgba(255,107,53,.35),transparent);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  padding:4px 6px 4px 2px;
  border-radius:var(--pill);
}
.brand__mark{
  flex:none;
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:13px;
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.03em;
  color:#04211D;
  background:conic-gradient(from 200deg,var(--aqua) 0deg,#6BF1DA 120deg,var(--flame) 240deg,var(--aqua) 360deg);
  box-shadow:0 0 0 1px rgba(23,224,192,.45),0 8px 20px -10px rgba(23,224,192,.9);
}
.brand__text{display:flex;flex-direction:column;gap:1px;min-width:0;line-height:1.16}
.brand__name{font-size:1.02rem;font-weight:900;letter-spacing:.01em;color:var(--paper)}
.brand__tag{
  font-family:var(--font-mono);
  font-size:.6rem;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--aqua);
  white-space:nowrap;
  opacity:.92;
}
.primary-nav{display:flex;align-items:center;gap:8px}
.primary-nav__list{display:flex;align-items:center;gap:2px}
.primary-nav__item{display:flex}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.5rem .88rem;
  border-radius:var(--pill);
  font-size:.93rem;
  font-weight:600;
  color:var(--mist);
  white-space:nowrap;
  transition:color var(--ease),background-color var(--ease),box-shadow var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(23,224,192,.10)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  background:rgba(23,224,192,.14);
  box-shadow:inset 0 0 0 1px var(--line-aqua);
}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;bottom:3px;
  width:5px;height:5px;
  margin-left:-2.5px;
  border-radius:50%;
  background:var(--flame);
}
.primary-nav__cta{margin-left:8px}
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:.55rem .95rem .55rem .8rem;
  border-radius:var(--pill);
  border:1px solid rgba(169,183,204,.28);
  background:rgba(18,52,90,.7);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--paper);
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--line-aqua);background:rgba(23,224,192,.14);color:#fff}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--aqua);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}
.header-progress{
  width:100%;
  max-width:1240px;
  height:2px;
  margin:7px auto 0;
  border-radius:2px;
  background:rgba(169,183,204,.16);
  overflow:hidden;
}
.header-progress__bar{
  display:block;
  width:100%;height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--aqua) 0%,#6BF1DA 46%,var(--flame) 100%);
  box-shadow:0 0 12px rgba(23,224,192,.7);
}
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(4,12,24,.66);
  opacity:0;
  visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);
}
.nav-scrim[data-visible]{opacity:1;visibility:visible}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,84px);
  background:var(--ink-900);
  border-top:1px solid rgba(23,224,192,.22);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(680px 280px at 12% -8%,rgba(23,224,192,.16),transparent 68%),
    radial-gradient(560px 260px at 88% 2%,rgba(255,107,53,.11),transparent 70%);
}
.footer-shell{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.9fr) minmax(0,.9fr) minmax(0,1.35fr);
  gap:clamp(26px,3.6vw,54px);
  padding:clamp(42px,6vw,72px) 0 clamp(30px,4vw,46px);
}
.footer-intro{display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:4px;
  margin:-4px;
  border-radius:var(--pill);
}
.footer-brand__mark{
  flex:none;
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:12px;
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  color:#04211D;
  background:linear-gradient(140deg,var(--aqua) 0%,#63F0D6 52%,var(--flame) 100%);
  box-shadow:0 10px 24px -14px rgba(23,224,192,.95);
}
.footer-brand__name{font-size:1.1rem;font-weight:900;letter-spacing:.01em;color:var(--paper)}
.footer-brand__text{
  margin-top:16px;
  max-width:34ch;
  color:var(--mist);
  font-size:.92rem;
  line-height:1.85;
}
.footer-col{min-width:0}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:.55rem;
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--aqua);
}
.footer-col__title::before{
  content:"";
  width:14px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--flame),rgba(255,107,53,.2));
}
.footer-col__list{display:grid;gap:11px}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:0;
  font-size:.92rem;
  color:var(--mist);
  transition:color var(--ease),gap var(--ease);
}
.footer-link::before{
  content:"";
  width:0;height:1px;
  border-radius:1px;
  background:var(--aqua);
  transition:width var(--ease);
}
.footer-link:hover{color:var(--paper);gap:8px}
.footer-link:hover::before{width:12px}
.footer-contact{min-width:0}
.footer-contact__list{display:grid;gap:14px}
.footer-contact__item{display:grid;gap:4px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:.64rem;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}
.footer-contact__value{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:.88rem;
  color:var(--paper);
  line-height:1.6;
}
.footer-contact__text{overflow-wrap:anywhere;min-width:0}
.footer-note{
  margin-top:16px;
  padding-left:11px;
  border-left:2px solid rgba(255,107,53,.5);
  font-size:.76rem;
  line-height:1.7;
  color:rgba(169,183,204,.82);
}
.footer-bottom{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px 24px;
  padding:20px 0 30px;
  border-top:1px solid rgba(169,183,204,.14);
  font-size:.8rem;
  color:var(--steel);
}
.footer-legal{
  font-size:.78rem;
  letter-spacing:.06em;
  color:rgba(169,183,204,.85);
}
.footer-legal-nav{display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px}
.footer-mini-link{font-size:.8rem;color:var(--mist);transition:color var(--ease)}
.footer-mini-link:hover{color:var(--aqua)}
.footer-mini-link__sep{color:rgba(169,183,204,.34)}
.footer-meta{font-size:.8rem;color:var(--steel)}

/* ---------- 通用容器与文本 ---------- */
.container{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:var(--shell-x);
}
.section{padding-block:clamp(38px,5.5vw,76px)}
.section-head{max-width:70ch;margin-bottom:clamp(22px,3vw,38px)}
.section-head__title{
  margin:0 0 12px;
  font-size:clamp(1.55rem,2.8vw,2.35rem);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
}
.section-head__text{
  margin:0;
  max-width:62ch;
  color:var(--mist);
  font-size:1rem;
  line-height:1.8;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--aqua);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--aqua),var(--flame));
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--mist)}
.prose{max-width:70ch;color:var(--mist);font-size:1rem;line-height:1.85}
.prose p{margin:0 0 1.1em}
.prose h2,.prose h3{color:var(--paper);margin:1.9em 0 .6em;line-height:1.2}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose strong{color:var(--paper);font-weight:800}
.prose a{color:var(--aqua);text-decoration:underline;text-underline-offset:3px}

/* ---------- 网格与 Bento ---------- */
.grid{display:grid;gap:clamp(14px,1.6vw,24px)}
.grid--bento{grid-template-columns:repeat(12,minmax(0,1fr))}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
  padding:.78rem 1.5rem;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-display);
  font-size:.94rem;
  font-weight:800;
  letter-spacing:.01em;
  text-align:center;
  cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--signal{
  background:linear-gradient(118deg,var(--aqua) 0%,#5BEFD4 100%);
  color:#04211D;
  box-shadow:0 14px 30px -18px rgba(23,224,192,.95);
}
.btn--signal:hover{box-shadow:0 20px 36px -16px rgba(23,224,192,.9)}
.btn--ghost{
  background:rgba(18,52,90,.55);
  color:var(--paper);
  border-color:rgba(169,183,204,.32);
}
.btn--ghost:hover{
  background:rgba(23,224,192,.14);
  border-color:var(--line-aqua);
  color:#fff;
}
.btn--sm{padding:.55rem 1.05rem;font-size:.84rem}

/* ---------- 卡片与标签 ---------- */
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:clamp(18px,2vw,26px);
  border-radius:var(--radius-lg);
  background:linear-gradient(155deg,rgba(18,52,90,.92) 0%,rgba(9,26,48,.94) 100%);
  border:1px solid var(--line-soft);
  overflow:hidden;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{
  transform:translateY(-3px);
  border-color:rgba(23,224,192,.40);
  box-shadow:0 26px 50px -34px rgba(0,0,0,.95);
}
.card__title{margin:0;font-size:1.08rem;font-weight:800;line-height:1.32;color:var(--paper)}
.card__text{margin:0;font-size:.92rem;line-height:1.75;color:var(--mist)}
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.28rem .7rem;
  border-radius:var(--pill);
  border:1px solid rgba(169,183,204,.2);
  background:rgba(169,183,204,.12);
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
  white-space:nowrap;
}
.tag--aqua{background:rgba(23,224,192,.14);border-color:rgba(23,224,192,.36);color:#8CF5E4}
.tag--flame{background:rgba(255,107,53,.14);border-color:rgba(255,107,53,.38);color:#FFB59A}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:6px;
  margin:0 0 clamp(16px,2.2vw,26px);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--steel);
}
.breadcrumbs__link{color:var(--mist);transition:color var(--ease)}
.breadcrumbs__link:hover{color:var(--aqua)}
.breadcrumbs__sep{color:rgba(169,183,204,.45)}
.breadcrumbs__current{color:var(--aqua)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-md);
  border:1px solid var(--line-soft);
  background:
    radial-gradient(120% 120% at 16% 0%,rgba(23,224,192,.24),transparent 62%),
    radial-gradient(90% 90% at 92% 100%,rgba(255,107,53,.16),transparent 66%),
    linear-gradient(150deg,var(--ink-700) 0%,var(--ink-900) 82%);
  isolation:isolate;
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(23,224,192,.10) 0 1px,transparent 1px 22px);
  opacity:.75;
}
.media-frame__img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  position:absolute;
  z-index:2;
  left:14px;right:14px;bottom:12px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(247,249,252,.86);
  text-shadow:0 1px 12px rgba(0,0,0,.75);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}

/* ---------- 复制按钮 ---------- */
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.22rem .62rem;
  border-radius:var(--pill);
  border:1px solid rgba(169,183,204,.3);
  background:rgba(169,183,204,.08);
  font-size:.7rem;
  font-weight:600;
  color:var(--mist);
  cursor:pointer;
  transition:color var(--ease),background-color var(--ease),border-color var(--ease);
}
.copy-btn:hover{border-color:rgba(23,224,192,.5);background:rgba(23,224,192,.12);color:var(--aqua)}
.copy-btn[data-copied]{border-color:var(--aqua);background:var(--aqua);color:#04211D}

/* ---------- 滚动显现协议 ---------- */
html.js-motion [data-reveal]{opacity:0;transform:translateY(22px)}
html.js-motion [data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.72,.24,1);
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-shell{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr)}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:980px){
  :root{--header-h:84px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:fixed;
    top:0;right:0;bottom:0;
    z-index:120;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    width:min(340px,84vw);
    padding:calc(var(--header-h) + 18px) 20px 30px;
    background:linear-gradient(172deg,#0E2745 0%,var(--ink-900) 100%);
    border-left:1px solid rgba(23,224,192,.22);
    border-radius:var(--radius-xl) 0 0 var(--radius-xl);
    box-shadow:-34px 0 70px -34px rgba(0,0,0,.95);
    transform:translateX(104%);
    visibility:hidden;
    overflow-y:auto;
    transition:transform .36s cubic-bezier(.32,.72,.28,1),visibility .36s linear;
  }
  .primary-nav[data-open]{transform:translateX(0);visibility:visible}
  .primary-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    width:100%;
    margin-bottom:16px;
  }
  .primary-nav__item{display:block}
  .nav-link{
    display:block;
    padding:.82rem 1rem;
    border-radius:var(--radius-md);
    font-size:1rem;
  }
  .nav-link[aria-current="page"]::after{left:auto;right:14px;bottom:auto;top:50%;margin:-2.5px 0 0}
  .primary-nav__cta{width:100%;margin:6px 0 0}
  .site-footer{margin-top:clamp(32px,6vw,60px)}
  html.is-nav-open,html.is-nav-open body{overflow:hidden}
  .grid--bento{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:900px){
  .footer-shell{grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(24px,4vw,36px)}
  .footer-intro,.footer-contact{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:720px){
  .brand__tag{font-size:.55rem;letter-spacing:.12em}
  .brand__mark{width:36px;height:36px;border-radius:11px;font-size:.76rem}
}
@media (max-width:640px){
  .grid--bento{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .footer-shell{grid-template-columns:minmax(0,1fr)}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:.6rem .7rem}
  .header-shell{padding:6px 8px 6px 12px;min-height:60px}
}
@media (max-width:420px){
  .brand__tag{display:none}
}

@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;
  }
  html.js-motion [data-reveal]{opacity:1;transform:none}
}