/* =========================================================
   必赢赛场 · /assets/site.css
   共享外壳：变量 / 重置 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

:root{
  --bg:#062A24;
  --bg-2:#0A3A31;
  --bg-3:#0E4A3E;
  --neon:#3BF2C7;
  --neon-soft:#7FFBE0;
  --amber:#F2B03B;
  --amber-deep:#8A5A12;
  --mist:#E8F5F0;
  --grey:#8FB3A8;
  --coral:#FF7A59;
  --white:#FFFFFF;
  --ink:#04211C;

  --hairline:rgba(59,242,199,.16);
  --hairline-soft:rgba(143,179,168,.22);

  --r-xl:34px;
  --r-lg:26px;
  --r-md:16px;
  --r-pill:999px;

  --page:min(1180px, calc(100% - 2.5rem));

  --font-body:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-display:"Arial Narrow","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

@media (max-width:640px){
  :root{ --page:calc(100% - 2rem); }
}

/* ---------------- 重置 ---------------- */
*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:1.5rem;
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.7;
  letter-spacing:.01em;
  color:var(--mist);
  background-color:var(--bg);
  background-image:
    radial-gradient(130% 30% at 50% 0%, rgba(59,242,199,.10), transparent 72%),
    radial-gradient(80% 26% at 92% 6%, rgba(242,176,59,.05), transparent 70%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img,svg,video{ display:block; max-width:100%; height:auto; }
ul,ol{ margin:0; padding:0; }
p{ margin:0 0 1em; }
button,input,select,textarea{ font:inherit; color:inherit; }
a{ color:var(--neon); text-underline-offset:.22em; }
address{ font-style:normal; }

::selection{ background:var(--neon); color:var(--ink); }

:focus-visible{
  outline:2px solid var(--neon-soft);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------------- 排版 ---------------- */
h1,h2,h3,h4{
  margin:0 0 .6em;
  font-family:var(--font-display);
  font-weight:300;
  line-height:1.14;
  letter-spacing:.015em;
  color:var(--white);
}
h1{ font-size:clamp(2.1rem,5.8vw,4rem); letter-spacing:.01em; }
h2{ font-size:clamp(1.5rem,3.4vw,2.4rem); }
h3{ font-size:clamp(1.05rem,1.8vw,1.35rem); font-weight:400; }
h4{ font-size:1rem; font-weight:400; letter-spacing:.06em; }

strong{ color:var(--white); font-weight:600; }
small{ font-size:.8rem; color:var(--grey); }

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
  line-height:1;
}

/* ---------------- 跳转链接 ---------------- */
.skip-link{
  position:fixed;
  top:.7rem;
  left:.7rem;
  z-index:120;
  padding:.55rem 1.1rem;
  border-radius:var(--r-pill);
  background:var(--neon);
  color:var(--ink);
  font-size:.85rem;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-360%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{ transform:translateY(0); }

/* ---------------- 头部 · 居中刊头 ---------------- */
.masthead{
  position:relative;
  z-index:40;
  border-bottom:1px solid var(--hairline);
  background:
    linear-gradient(180deg, rgba(10,58,49,.94), rgba(6,42,36,.88));
}
.masthead.is-stuck{
  border-bottom-color:rgba(59,242,199,.34);
  box-shadow:0 14px 34px -22px rgba(0,0,0,.85);
}

.masthead__inner{
  width:var(--page);
  margin-inline:auto;
  padding:1.1rem 0 .9rem;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"rail brand actions";
  align-items:center;
  gap:.6rem 1rem;
}

.masthead__rail{
  grid-area:rail;
  justify-self:start;
  margin:0;
  display:flex;
  align-items:center;
  gap:.4rem;
}

.masthead__brand{
  grid-area:brand;
  justify-self:center;
  text-align:center;
}

.masthead__logo{
  display:block;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.45rem,3.2vw,2.05rem);
  line-height:1.05;
  letter-spacing:.18em;
  text-indent:.18em;
  color:var(--white);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.masthead__logo:hover{ color:var(--neon); }

.masthead__tagline{
  display:block;
  margin-top:.4rem;
  font-size:.7rem;
  letter-spacing:.24em;
  color:var(--grey);
}

.masthead__actions{
  grid-area:actions;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:.5rem;
}

/* 索引胶囊 */
.chip{
  display:inline-flex;
  align-items:center;
  padding:.22rem .62rem;
  border:1px solid var(--hairline-soft);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  color:var(--grey);
  white-space:nowrap;
}
.chip--neon{
  color:var(--neon);
  border-color:rgba(59,242,199,.42);
  background:rgba(59,242,199,.08);
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.4rem;
  padding:.48rem 1rem;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--font-display);
  font-size:.8rem;
  letter-spacing:.1em;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.btn:active{ transform:translateY(1px); }

.btn--solid{
  background:var(--neon);
  color:var(--ink);
  font-weight:700;
}
.btn--solid:hover{ background:var(--neon-soft); }

.btn--ghost{
  background:transparent;
  color:var(--neon);
  border-color:rgba(59,242,199,.45);
}
.btn--ghost:hover{
  background:rgba(59,242,199,.12);
  border-color:var(--neon);
}

.btn--amber{
  background:transparent;
  color:var(--amber);
  border-color:rgba(242,176,59,.5);
}
.btn--amber:hover{ background:rgba(242,176,59,.14); }

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.44rem .8rem;
  background:transparent;
  color:var(--neon);
  border:1px solid rgba(59,242,199,.45);
  border-radius:var(--r-pill);
  font-family:var(--font-display);
  font-size:.78rem;
  letter-spacing:.12em;
  cursor:pointer;
  transition:background .18s var(--ease);
}
.nav-toggle:hover{ background:rgba(59,242,199,.12); }
.nav-toggle__bars{ display:grid; gap:3px; width:16px; }
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease), opacity .2s var(--ease);
}
[data-header][data-open] .nav-toggle__bars i:nth-child(1){ transform:translateY(5px) rotate(45deg); }
[data-header][data-open] .nav-toggle__bars i:nth-child(2){ opacity:0; }
[data-header][data-open] .nav-toggle__bars i:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }

/* 导航索引条 */
.site-nav{
  overflow-x:auto;
  overflow-y:hidden;
  border-top:1px solid rgba(59,242,199,.12);
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.site-nav::-webkit-scrollbar{ display:none; }

.site-nav__list{
  display:flex;
  gap:.35rem;
  width:max-content;
  margin:0 auto;
  padding:.5rem 1.25rem .6rem;
  list-style:none;
}

.site-nav__item a{
  display:block;
  padding:.4rem .9rem;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--font-display);
  font-size:.82rem;
  letter-spacing:.08em;
  color:var(--grey);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.site-nav__item a:hover{
  color:var(--neon);
  background:rgba(59,242,199,.09);
}
.site-nav__item a[aria-current="page"]{
  color:var(--ink);
  background:var(--neon);
  border-color:var(--neon);
  box-shadow:0 0 0 4px rgba(59,242,199,.14);
}

/* ---------------- 页脚 ---------------- */
.site-footer{
  margin-top:4.5rem;
  border-top:1px solid var(--hairline);
  background:linear-gradient(180deg, rgba(10,58,49,.6), rgba(4,28,24,.94));
}

.site-footer__inner{
  width:var(--page);
  margin-inline:auto;
  padding:3rem 0 2rem;
  display:grid;
  grid-template-columns:1.1fr 2.4fr 1.2fr;
  gap:2.4rem 2rem;
}

.site-footer__logo{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:300;
  font-size:1.35rem;
  letter-spacing:.16em;
  text-indent:.16em;
  color:var(--white);
  text-decoration:none;
}
.site-footer__logo:hover{ color:var(--neon); }

.site-footer__line{
  margin:.7rem 0 0;
  font-size:.82rem;
  color:var(--grey);
  line-height:1.55;
}
.site-footer__line--mono{
  font-family:var(--font-mono);
  letter-spacing:.1em;
  color:rgba(143,179,168,.7);
}

.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:1.4rem;
}

.site-footer__head{
  margin:0 0 .85rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--neon);
  text-transform:uppercase;
}

.site-footer__list{
  list-style:none;
  display:grid;
  gap:.5rem;
}
.site-footer__list a{
  font-size:.88rem;
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease), border-color .18s var(--ease);
}
.site-footer__list a:hover{
  color:var(--neon);
  border-bottom-color:rgba(59,242,199,.5);
}

.site-footer__address{
  display:grid;
  gap:.5rem;
  font-size:.86rem;
  color:var(--grey);
  line-height:1.6;
  word-break:break-word;
}
.site-footer__address span:first-child{ font-family:var(--font-mono); font-size:.82rem; }

.site-footer__legal{
  width:var(--page);
  margin-inline:auto;
  padding:1.1rem 0 2.2rem;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:.5rem 1.2rem;
  border-top:1px solid var(--hairline-soft);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  color:rgba(143,179,168,.78);
}
.site-footer__legal p{ margin:0; }

/* ---------------- 通用容器 / 网格 ---------------- */
.wrap{
  width:var(--page);
  margin-inline:auto;
}

.section{ padding:3rem 0; }

.grid{ display:grid; gap:1rem; }
.grid--2{ grid-template-columns:repeat(2, minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3, minmax(0,1fr)); }
.grid--4{ grid-template-columns:repeat(4, minmax(0,1fr)); }

.sec-head{
  display:flex;
  align-items:baseline;
  gap:.8rem;
  margin:0 0 1.3rem;
}
.sec-head__no{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.18em;
  color:var(--neon);
  flex:none;
}
.sec-head__title{
  margin:0;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.2rem,2.6vw,1.75rem);
  letter-spacing:.05em;
  color:var(--white);
}

/* ---------------- 卡片 / 数据 ---------------- */
.card{
  background:var(--bg-2);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  padding:1.25rem 1.3rem;
}
.card--quiet{ background:rgba(10,58,49,.55); }
.card--amber{ border-color:rgba(242,176,59,.4); }

.card__label{
  display:block;
  margin-bottom:.6rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--grey);
}

/* ---------------- 面包屑 ---------------- */
.breadcrumb{
  width:var(--page);
  margin:1.6rem auto 0;
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  list-style:none;
  font-size:.78rem;
  color:var(--grey);
}
.breadcrumb li{ display:flex; align-items:center; }
.breadcrumb li + li::before{
  content:"/";
  margin-right:.45rem;
  color:rgba(143,179,168,.45);
}
.breadcrumb a{
  color:var(--grey);
  text-decoration:none;
}
.breadcrumb a:hover{ color:var(--neon); }
.breadcrumb [aria-current="page"]{ color:var(--mist); }

/* ---------------- 图片容器（页面阶段放 img） ---------------- */
.media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--hairline);
  border-radius:var(--r-xl);
  background:linear-gradient(135deg, var(--bg-3), var(--bg) 70%);
  isolation:isolate;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(59,242,199,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,242,199,.07) 1px, transparent 1px);
  background-size:30px 30px;
}
.media > img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{ aspect-ratio:21 / 9; }
.media--square{ aspect-ratio:1 / 1; }
.media--tall{ aspect-ratio:3 / 4; }

.media__caption{
  display:block;
  margin-top:.6rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--grey);
}

/* ---------------- 滚动进度条 ---------------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:110;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg, var(--neon), var(--amber));
  pointer-events:none;
}

/* ---------------- 显现 ---------------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------------- 响应式 ---------------- */
@media (max-width:1000px){
  .site-footer__inner{
    grid-template-columns:1fr 1fr;
  }
  .site-footer__nav{
    grid-column:1 / -1;
    order:3;
  }
  .grid--4{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .grid--3{ grid-template-columns:repeat(2, minmax(0,1fr)); }
}

@media (max-width:900px){
  .masthead__inner{
    grid-template-columns:auto 1fr auto;
    padding:.9rem 0 .8rem;
    gap:.5rem;
  }
  .masthead__actions .btn{ display:none; }
  .nav-toggle{ display:inline-flex; }

  .site-nav{ display:none; }
  [data-header][data-open] .site-nav{
    display:block;
    animation:navIn .2s var(--ease) both;
  }
  .site-nav__list{
    margin:0;
    padding:.55rem 1rem .7rem;
  }
}

@keyframes navIn{
  from{ opacity:0; transform:translateY(-6px); }
  to{ opacity:1; transform:none; }
}

@media (max-width:640px){
  .grid--2,
  .grid--3,
  .grid--4{ grid-template-columns:1fr; }

  .section{ padding:2.4rem 0; }

  .site-footer__inner{
    grid-template-columns:1fr;
    padding:2.4rem 0 1.6rem;
    gap:1.8rem;
  }
  .site-footer__nav{ grid-template-columns:1fr 1fr; }
  .site-footer__legal{ padding-bottom:1.8rem; }
}

@media (max-width:560px){
  .masthead__rail{ display:none; }
  .masthead__inner{
    grid-template-columns:1fr auto;
    grid-template-areas:"brand actions";
  }
  .masthead__brand{ justify-self:start; text-align:left; }
  .masthead__logo{ letter-spacing:.14em; text-indent:.14em; }
  .masthead__tagline{ letter-spacing:.16em; }
}

/* ---------------- 减少动态 ---------------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .scroll-progress{ display:none; }
}