/* ==========================================================================
   必定赢国际站 · 共享站点样式 /assets/site.css
   蓝图网格 · 悬浮胶囊导航 · 切角面板 · 琥珀金 + 电光青
   ========================================================================== */

/* --- 01 设计令牌 --------------------------------------------------------- */
:root{
  --ink-900:#0A1633;
  --ink-800:#132A52;
  --ink-700:#1E3A6B;
  --amber:#FFB300;
  --amber-soft:#FFD166;
  --cyan:#00E5FF;
  --cyan-mist:#7FDBFF;
  --paper:#E8F1FF;
  --muted:#A9B8D0;
  --deep-teal:#0A2A33;

  --line:rgba(30,58,107,.9);
  --line-soft:rgba(30,58,107,.55);
  --hair:rgba(127,219,255,.16);

  --radius-pill:999px;
  --chamfer:14px;

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Fira Code","Noto Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell-max:1240px;
  --gutter:clamp(16px,4vw,32px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* --- 02 Reset ------------------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,address{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* --- 03 基础排版与蓝图底纹 ------------------------------------------------ */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(30,58,107,.34) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,58,107,.34) 1px,transparent 1px),
    radial-gradient(120% 80% at 78% -10%,rgba(0,229,255,.10),transparent 62%),
    radial-gradient(90% 70% at 6% 4%,rgba(255,179,0,.07),transparent 58%);
  background-size:64px 64px,64px 64px,auto,auto;
  background-attachment:fixed,fixed,scroll,scroll;
}

h1,h2,h3,h4,.h1,.h2,.h3{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--paper);
}
h1,.h1{font-size:clamp(30px,4.6vw,54px)}
h2,.h2{font-size:clamp(23px,3vw,36px)}
h3,.h3{font-size:clamp(18px,2vw,24px)}
h4,.h4{font-size:clamp(16px,1.5vw,18px);font-family:var(--font-body);font-weight:700;letter-spacing:0}

p{max-width:78ch}
strong{color:var(--paper);font-weight:700}
::selection{background:var(--amber);color:var(--ink-900)}

.mono,.eyebrow,.footer__legal,.footer__copy,.nav__idx,.nav__panel-title,
.footer__coords,.footer__label,.footer__hint,.breadcrumb,.img-frame__caption{
  font-family:var(--font-mono);
  font-size:.8125rem;
  line-height:1.65;
  letter-spacing:.05em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.6875rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--cyan-mist);
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--amber),transparent)}
.lede{font-size:clamp(16px,1.5vw,19px);line-height:1.85;color:var(--muted);max-width:64ch}
.muted{color:var(--muted)}

/* --- 04 布局工具 --------------------------------------------------------- */
.wrap{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(34px,5vw,62px)}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,32px);padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,22px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.divider{height:1px;border:0;background:linear-gradient(90deg,transparent,var(--line),transparent)}
#main-content{scroll-margin-top:110px;display:block}

/* --- 05 切角面板 / 卡片 / 图片容器 ---------------------------------------- */
.chamfer,.panel,.card,.img-frame{
  --chamfer:14px;
  clip-path:polygon(
    var(--chamfer) 0,
    100% 0,
    100% calc(100% - var(--chamfer)),
    calc(100% - var(--chamfer)) 100%,
    0 100%,
    0 var(--chamfer)
  );
}
.panel{
  position:relative;
  padding:clamp(16px,2.3vw,24px);
  background:linear-gradient(158deg,rgba(19,42,82,.94),rgba(10,42,51,.9));
  filter:drop-shadow(0 0 .7px rgba(30,58,107,1)) drop-shadow(0 22px 40px rgba(0,0,0,.36));
}
.panel::before{
  content:"";position:absolute;left:var(--chamfer);right:26%;top:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(0,229,255,0));
}
.card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:clamp(16px,2.2vw,22px);
  background:linear-gradient(158deg,rgba(19,42,82,.92),rgba(10,42,51,.88));
  border-left:3px solid var(--ink-700);
  transition:transform .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease);
}
.card:hover,.card:focus-within{
  transform:translateY(-3px);
  border-left-color:var(--amber);
  filter:drop-shadow(0 26px 40px rgba(0,0,0,.45));
}
.card__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.card__index{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.16em;color:var(--amber)}

.img-frame{
  position:relative;display:block;overflow:hidden;min-height:150px;
  background:linear-gradient(150deg,var(--ink-800),var(--deep-teal));
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(0deg,rgba(0,229,255,.07) 0 1px,transparent 1px 5px),
    linear-gradient(180deg,rgba(10,22,51,0) 42%,rgba(10,22,51,.72) 100%);
}
.img-frame--16x9{aspect-ratio:16/9}
.img-frame--4x3{aspect-ratio:4/3}
.img-frame--1x1{aspect-ratio:1/1}
.img-frame--21x9{aspect-ratio:21/9}
.img-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:10px 14px;font-size:.6875rem;color:var(--cyan-mist);
  background:linear-gradient(180deg,transparent,rgba(10,22,51,.88));
}
.img-frame--flat::after{background:none}

/* --- 06 按钮 / 标签 / 面包屑 --------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .16s var(--ease),background .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn--accent{background:linear-gradient(120deg,var(--amber),var(--amber-soft));color:var(--ink-900);box-shadow:0 14px 30px -18px rgba(255,179,0,.95)}
.btn--accent:hover{transform:translateY(-1px);box-shadow:0 20px 36px -16px rgba(255,179,0,1)}
.btn--ghost{border-color:var(--ink-700);background:rgba(19,42,82,.62);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--cyan{background:linear-gradient(120deg,var(--cyan),var(--cyan-mist));color:var(--ink-900)}
.btn--cyan:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(1px)}

.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:3px 11px 3px 9px;border-left:3px solid var(--cyan);
  border-radius:0 6px 6px 0;
  background:rgba(0,229,255,.10);color:var(--cyan-mist);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}
.tag--amber{border-left-color:var(--amber);background:rgba(255,179,0,.12);color:var(--amber-soft)}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.75rem;color:var(--muted)}
.breadcrumb__sep{color:var(--ink-700)}
.breadcrumb a{color:var(--cyan-mist)}
.breadcrumb a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* --- 07 跳过链接 --------------------------------------------------------- */
.skip-link{
  position:fixed;left:16px;top:-120px;z-index:300;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:var(--amber);color:var(--ink-900);
  font-size:14px;font-weight:700;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px}

/* --- 08 页头：悬浮胶囊浮岛 ------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:120;
  padding:12px var(--gutter) 10px;
  background:linear-gradient(180deg,rgba(10,22,51,.96) 0%,rgba(10,22,51,.78) 58%,rgba(10,22,51,0) 100%);
}
.site-header::after{
  content:"";position:absolute;left:var(--gutter);right:var(--gutter);bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,229,255,.32),transparent);
  opacity:0;transition:opacity .3s var(--ease);pointer-events:none;
}
.site-header[data-scrolled="true"]::after{opacity:1}

.progress{
  position:fixed;left:0;right:0;top:0;height:2px;z-index:150;
  background:rgba(30,58,107,.45);pointer-events:none;
}
.progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--amber))}

.site-header__island{
  position:relative;
  width:100%;max-width:var(--shell-max);margin-inline:auto;
  display:flex;align-items:center;gap:clamp(8px,1.4vw,18px);
  padding:8px 10px 8px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(19,42,82,.94),rgba(10,22,51,.88));
  box-shadow:0 22px 46px -32px rgba(0,0,0,.95),inset 0 1px 0 rgba(232,241,255,.07);
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;padding:3px 2px;border-radius:var(--radius-pill)}
.brand__mark{display:inline-grid;grid-template-columns:repeat(3,4px);align-items:end;gap:3px;height:22px;width:18px}
.brand__mark span{display:block;width:4px;border-radius:1px}
.brand__mark span:nth-child(1){height:58%;background:var(--cyan)}
.brand__mark span:nth-child(2){height:100%;background:var(--amber)}
.brand__mark span:nth-child(3){height:38%;background:var(--cyan-mist)}
.brand__text{display:block}
.brand__name{
  display:block;font-family:var(--font-display);font-weight:700;
  font-size:19px;line-height:1.15;letter-spacing:0;color:var(--paper);white-space:nowrap;
}
.brand__meta{display:block;font-size:10px;letter-spacing:.24em;color:var(--cyan-mist);opacity:.8}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:9px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--ink-700);background:rgba(10,42,51,.72);
  color:var(--paper);font-size:14px;font-weight:600;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px}
.nav-toggle__bars span{display:block;width:16px;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--amber);color:var(--amber-soft)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) 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(-5px) rotate(-45deg)}

.nav{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{position:relative}
.nav__link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 15px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;color:var(--muted);white-space:nowrap;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav__link:hover{color:var(--paper);background:rgba(0,229,255,.10)}
.nav__link[aria-current="page"]{
  color:var(--ink-900);
  background:linear-gradient(120deg,var(--amber),var(--amber-soft));
  box-shadow:0 12px 26px -16px rgba(255,179,0,.95);
}
.nav__caret{
  width:6px;height:6px;opacity:.7;
  border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-1px);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav__item--has-menu:hover .nav__caret,
.nav__item--has-menu:focus-within .nav__caret{transform:rotate(225deg) translateY(-1px);opacity:1}
.nav__item--has-menu::after{content:"";position:absolute;left:0;right:0;top:100%;height:18px}

.nav__panel{
  position:absolute;top:calc(100% + 14px);left:50%;
  min-width:252px;padding:15px 14px 12px;
  background:linear-gradient(160deg,rgba(19,42,82,.99),rgba(10,42,51,.98));
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  filter:drop-shadow(0 0 .8px rgba(30,58,107,1)) drop-shadow(0 24px 42px rgba(0,0,0,.58));
  transform:translate(-50%,-8px);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s linear;
}
.nav__panel::before{
  content:"";position:absolute;left:14px;right:14px;top:0;height:2px;
  background:linear-gradient(90deg,var(--amber),rgba(255,179,0,0));
}
.nav__item--has-menu:hover .nav__panel,
.nav__item--has-menu:focus-within .nav__panel{
  opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0);
}
.nav__panel-title{font-size:10px;letter-spacing:.22em;color:var(--cyan-mist);opacity:.85;margin-bottom:10px}
.nav__sub{display:grid;gap:2px}
.nav__sublink{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:8px;
  font-size:14px;color:var(--paper);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.nav__sublink:hover,.nav__sublink:focus-visible{background:rgba(0,229,255,.12);color:var(--cyan)}
.nav__idx{font-size:11px;letter-spacing:.06em;color:var(--amber);opacity:.9}
.nav__cta{margin-left:6px}

/* --- 09 页脚：读数台 ------------------------------------------------------ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,22,51,0) 0%,rgba(10,42,51,.86) 20%,#061020 100%);
  color:var(--muted);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(30,58,107,.34) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,58,107,.34) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 72%);
}
.footer__rail{
  position:relative;z-index:2;height:6px;
  background:
    repeating-linear-gradient(90deg,rgba(0,229,255,.55) 0 1px,transparent 1px 16px),
    repeating-linear-gradient(90deg,rgba(255,179,0,.55) 0 2px,transparent 2px 160px);
}
.footer__inner{position:relative;z-index:2;padding-top:clamp(34px,5vw,62px);padding-bottom:clamp(22px,3vw,34px)}
.footer__grid{
  display:grid;gap:clamp(26px,4vw,44px);
  grid-template-columns:minmax(220px,1.5fr) repeat(3,minmax(150px,1fr));
}
.footer__brand .brand{margin-bottom:14px}
.footer__coords{font-size:.6875rem;letter-spacing:.16em;color:var(--cyan-mist);opacity:.85;margin-bottom:10px}
.footer__note{font-size:13.5px;line-height:1.8;color:var(--muted);max-width:34ch}

.footer__col-title{
  position:relative;
  font-family:var(--font-display);font-weight:700;
  font-size:14px;letter-spacing:.14em;color:var(--paper);
  padding-bottom:9px;margin-bottom:16px;border-bottom:1px solid var(--line-soft);
}
.footer__col-title::after{content:"";position:absolute;left:0;bottom:-1px;width:30px;height:2px;background:var(--amber)}
.footer__list{display:grid;gap:9px}
.footer__link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14px;color:var(--muted);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer__link::before{content:"";width:5px;height:5px;background:var(--ink-700);transform:rotate(45deg);transition:background .16s var(--ease)}
.footer__link:hover,.footer__link:focus-visible{color:var(--cyan);transform:translateX(3px)}
.footer__link:hover::before,.footer__link:focus-visible::before{background:var(--amber)}

.footer__contact{display:grid;gap:11px}
.footer__contact li{display:grid;gap:2px}
.footer__label{font-size:10px;letter-spacing:.22em;color:var(--cyan-mist);opacity:.85}
.footer__value{font-size:14px;line-height:1.65;color:var(--paper);word-break:break-word}
.footer__hint{
  margin-top:14px;padding-left:11px;
  border-left:2px solid var(--ink-700);
  font-size:.6875rem;line-height:1.75;color:var(--muted);opacity:.78;
}
.footer__bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  margin-top:clamp(28px,4vw,44px);padding-top:16px;
  border-top:1px solid var(--line-soft);
}
.footer__legal,.footer__copy{font-size:.75rem;letter-spacing:.08em;color:var(--muted)}

/* --- 10 焦点与滚动显现 ---------------------------------------------------- */
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}
.nav__link:focus-visible,
.nav__sublink:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible{
  outline:none;
  box-shadow:0 0 0 2px var(--ink-900),0 0 0 4px var(--cyan);
}

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

/* --- 11 响应式 ------------------------------------------------------------ */
@media (max-width:1080px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
}

@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .site-header{padding-top:10px}
  .site-header__island{padding:7px 8px 7px 14px;border-radius:24px}
  .nav{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:8px;margin-left:0;
    padding:0 14px;max-height:0;overflow:hidden;
    opacity:0;visibility:hidden;
    border:1px solid transparent;border-radius:22px;
    background:linear-gradient(160deg,rgba(19,42,82,.99),rgba(10,22,51,.99));
    transition:max-height .28s var(--ease),opacity .2s var(--ease),padding .28s var(--ease),visibility .28s linear;
  }
  [data-header-island][data-open] .nav{
    max-height:min(74vh,580px);overflow-y:auto;
    padding:14px;opacity:1;visibility:visible;
    border-color:var(--line);
    box-shadow:0 34px 64px -32px rgba(0,0,0,.95);
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__link{
    width:100%;justify-content:space-between;
    padding:12px 14px;border-radius:12px;
    background:rgba(10,42,51,.55);
  }
  .nav__link[aria-current="page"]{background:linear-gradient(120deg,var(--amber),var(--amber-soft))}
  .nav__item--has-menu::after{display:none}
  .nav__panel{
    position:static;min-width:0;margin:4px 0 8px;
    transform:none;opacity:1;visibility:visible;pointer-events:auto;
    clip-path:none;filter:none;
    padding:10px 10px 10px 14px;
    border-left:2px solid var(--amber);
    border-radius:10px;
    background:rgba(10,42,51,.6);
  }
  .nav__panel::before{display:none}
  .nav__item--has-menu:hover .nav__panel,
  .nav__item--has-menu:focus-within .nav__panel{transform:none}
  .nav__cta{width:100%;margin-left:0;margin-top:4px}
}

@media (max-width:640px){
  body{background-size:48px 48px,48px 48px,auto,auto}
  .brand__name{font-size:17px}
  .brand__meta{display:none}
  .grid{gap:14px}
  .col-3,.col-4,.col-6{grid-column:span 12}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer__bottom{justify-content:flex-start}
  .footer__note{max-width:none}
}

@media (min-width:981px) and (max-width:1080px){
  .nav__link{padding:9px 11px;font-size:14px}
  .brand__meta{display:none}
}

/* --- 12 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;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .card:hover,.card:focus-within{transform:none}
}