/* =========================================================
   W88体育 / Site Kit
   文件: /assets/site.css
   角色: 全站共享样式（头部·页脚·通用组件）
   ========================================================= */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body{min-height:100vh;}
img,svg,video,picture{display:block;max-width:100%;height:auto;}
input,button,textarea,select{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
table{border-collapse:collapse;border-spacing:0;}

/* ---------- Variables ---------- */
:root{
  --c-deep:#0B1F3A;
  --c-deep-2:#112B4F;
  --c-steel:#2A4B6A;
  --c-neon:#B6F500;
  --c-orange:#FF7A00;
  --c-ink:#0A0E1A;
  --c-paper:#F0F4F8;
  --c-white:#FFFFFF;
  --c-mist:#D9E2EC;
  --c-red:#FF2E63;

  --font-head:'Avenir Next Condensed','Helvetica Neue','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-body:'Helvetica Neue','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-mono:'SF Mono','Cascadia Code',Consolas,'Liberation Mono',monospace;

  --rail-w:280px;
  --bar-h:64px;

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

  --border:3px;
  --shadow-hard:10px 10px 0 rgba(11,31,58,.18);
  --ease:cubic-bezier(.22,1,.36,1);
}

/* ---------- Base Typography ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  color:var(--c-ink);
  background:var(--c-paper);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.2;
  color:var(--c-deep);
}

p{margin-bottom:1em;}
strong,b{font-weight:700;}
em,i{font-style:normal;color:var(--c-orange);}

/* ---------- Layout Utilities ---------- */
.page-container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--sp-4);
  padding-right:var(--sp-4);
}

.page-section{
  padding-top:var(--sp-7);
  padding-bottom:var(--sp-7);
}

.page-section--compact{
  padding-top:var(--sp-5);
  padding-bottom:var(--sp-5);
}

.grid{
  display:grid;
  gap:var(--sp-4);
}

.grid-cols-2{grid-template-columns:repeat(2,1fr);}
.grid-cols-3{grid-template-columns:repeat(3,1fr);}

/* ---------- Section Panel ---------- */
.section-panel{
  display:block;
  background:var(--c-white);
  border:var(--border) solid var(--c-deep);
  box-shadow:var(--shadow-hard);
  padding:var(--sp-5);
}

.section-panel + .section-panel{
  margin-top:var(--sp-5);
}

.section-index{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-steel);
  padding-bottom:6px;
  border-bottom:2px solid var(--c-neon);
  margin-bottom:14px;
}

.section-title{
  font-family:var(--font-head);
  font-weight:200;
  font-size:clamp(40px,6vw,72px);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--c-deep);
  margin-bottom:var(--sp-3);
}

.section-body{
  font-size:16px;
  line-height:1.7;
  color:var(--c-steel);
  max-width:72ch;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border:var(--border) solid var(--c-deep);
  background:transparent;
  color:var(--c-deep);
  font-family:var(--font-head);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  text-transform:uppercase;
  cursor:pointer;
  line-height:1.2;
  transition:transform .15s var(--ease),box-shadow .15s var(--ease),background-color .15s,border-color .15s;
}

.btn:hover{
  transform:translateY(-2px);
  box-shadow:4px 4px 0 0 var(--c-deep);
}

.btn:active{
  transform:translateY(0);
  box-shadow:none;
}

.btn-primary{
  background:var(--c-neon);
}

.btn-primary:hover{
  box-shadow:4px 4px 0 0 var(--c-deep);
}

.btn-outline{
  border-color:var(--c-steel);
  color:var(--c-steel);
}

.btn-outline:hover{
  border-color:var(--c-orange);
  color:var(--c-orange);
  box-shadow:4px 4px 0 0 rgba(255,122,0,.25);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-steel);
  padding:var(--sp-3) 0;
  text-transform:uppercase;
}

.breadcrumb a{
  text-decoration:underline;
  text-underline-offset:3px;
}

.breadcrumb a:hover{
  color:var(--c-neon);
  background:var(--c-deep);
}

.breadcrumb [aria-current="page"]{
  font-weight:700;
  color:var(--c-deep);
  background:var(--c-neon);
  padding:2px 8px;
}

/* ---------- Image Frames ---------- */
.image-frame{
  position:relative;
  overflow:hidden;
  background:var(--c-mist);
  border:var(--border) solid var(--c-deep);
  min-height:160px;
}

.image-frame::before{
  content:'';
  position:absolute;
  inset:0;
  background:
    linear-gradient(rgba(11,31,58,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,31,58,.07) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}

.image-frame::after{
  content:'';
  position:absolute;
  top:0;
  right:0;
  border-style:solid;
  border-width:0 36px 36px 0;
  border-color:transparent var(--c-deep) transparent transparent;
  pointer-events:none;
}

.image-frame img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:contrast(1.05);
}

.image-frame--tilted{
  transform:rotate(-1.2deg);
}

.image-frame--accent{
  border-color:var(--c-orange);
}

/* ---------- Skip Link ---------- */
.skip-link{
  position:fixed;
  top:-100%;
  left:0;
  z-index:3000;
  display:inline-block;
  background:var(--c-neon);
  color:var(--c-ink);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  padding:12px 24px;
  border:2px solid var(--c-deep);
  transition:top .2s var(--ease);
}

.skip-link:focus{
  top:0;
  left:0;
  outline:none;
}

/* ---------- Focus Visible ---------- */
:focus-visible{
  outline:3px solid var(--c-neon);
  outline-offset:2px;
}

/* =========================================================
   Header
   ========================================================= */
.site-header{
  position:fixed;
  top:0;
  left:0;
  z-index:1000;
  display:flex;
  flex-direction:column;
  background:var(--c-deep);
  color:var(--c-white);
  border-right:var(--border) solid var(--c-neon);
  padding:var(--sp-4) var(--sp-3) var(--sp-3);
}

.header-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.brand{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  line-height:1;
  color:var(--c-white);
}

.brand-index{
  font-family:var(--font-head);
  font-weight:900;
  font-size:28px;
  letter-spacing:-.02em;
  color:var(--c-white);
  line-height:1;
}

.brand-slash{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--c-neon);
}

.brand-name{
  font-family:var(--font-head);
  font-weight:300;
  font-size:17px;
  letter-spacing:.1em;
  color:var(--c-mist);
}

.brand:hover .brand-index{
  color:var(--c-neon);
}

/* --- Nav Toggle --- */
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:44px;
  height:44px;
  background:transparent;
  border:2px solid var(--c-steel);
  cursor:pointer;
  padding:0;
}

.nav-toggle-line{
  display:block;
  width:20px;
  height:2px;
  background:var(--c-white);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

/* --- Site Nav --- */
.site-nav{
  flex:1;
  margin-top:40px;
}

.nav-list{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.nav-link{
  display:flex;
  align-items:center;
  gap:14px;
  padding:11px 14px;
  border:2px solid transparent;
  color:rgba(255,255,255,.78);
  font-family:var(--font-head);
  font-weight:600;
  font-size:15px;
  letter-spacing:.02em;
  transition:border-color .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease);
}

.nav-link:hover{
  border-color:var(--c-steel);
  background:rgba(255,255,255,.05);
  color:var(--c-white);
}

.nav-link[aria-current="page"]{
  border-color:var(--c-neon);
  background:rgba(182,245,0,.09);
  color:var(--c-neon);
}

.nav-index{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--c-steel);
  letter-spacing:.04em;
}

.nav-link[aria-current="page"] .nav-index{
  color:var(--c-neon);
}

.nav-label{
  flex:1;
}

/* --- Header Track (scroll progress) --- */
.header-track{
  position:relative;
  width:100%;
  height:4px;
  background:rgba(255,255,255,.16);
  margin-top:auto;
  margin-bottom:16px;
  overflow:hidden;
}

.track-fill{
  display:block;
  width:0%;
  height:100%;
  background:var(--c-neon);
}

/* --- Header Top (back to top) --- */
.header-top{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  width:100%;
  padding:9px 14px;
  background:transparent;
  border:2px solid var(--c-steel);
  color:var(--c-white);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}

.header-top:hover{
  border-color:var(--c-neon);
  background:rgba(182,245,0,.08);
}

.header-top.is-visible{
  opacity:1;
  pointer-events:auto;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{
  background:var(--c-ink);
  color:rgba(255,255,255,.82);
  border-top:var(--border) solid var(--c-neon);
  margin-top:var(--sp-7);
  padding-top:var(--sp-6);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:var(--sp-5);
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 var(--sp-4);
}

.footer-brand-cell .brand--footer{
  margin-bottom:var(--sp-2);
}

.brand--footer .brand-index{
  font-size:34px;
}

.brand--footer .brand-name{
  font-size:19px;
  color:rgba(255,255,255,.9);
}

.footer-trust{
  font-size:14px;
  line-height:1.7;
  color:rgba(255,255,255,.62);
  max-width:38ch;
  margin-top:12px;
}

.footer-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-neon);
  padding-bottom:8px;
  border-bottom:2px solid rgba(255,255,255,.15);
  margin-bottom:14px;
}

.footer-list{
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:14px;
}

.footer-list a{
  color:rgba(255,255,255,.78);
  transition:color .2s,background-color .2s;
  padding:2px 0;
}

.footer-list a:hover{
  color:var(--c-neon);
  background:rgba(182,245,0,.06);
}

.footer-contact-list{
  color:rgba(255,255,255,.65);
  font-size:13px;
  line-height:1.6;
  word-break:break-all;
}

.footer-contact-list li{
  padding-left:14px;
  position:relative;
}

.footer-contact-list li::before{
  content:'/';
  position:absolute;
  left:0;
  color:var(--c-orange);
  font-family:var(--font-mono);
}

.footer-bottom{
  margin-top:var(--sp-5);
  border-top:1px solid rgba(255,255,255,.12);
  padding:var(--sp-3) var(--sp-4);
  text-align:center;
}

.footer-copyright{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.5);
  margin:0;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (min-width:1024px){
  body{
    padding-left:var(--rail-w);
  }

  .site-header{
    width:var(--rail-w);
    height:100vh;
    border-bottom:none;
  }
}

@media (max-width:1023px){
  body{
    padding-top:var(--bar-h);
  }

  .site-header{
    top:0;
    left:0;
    right:0;
    width:100%;
    height:var(--bar-h);
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:0 var(--sp-3);
    border-right:none;
    border-bottom:var(--border) solid var(--c-neon);
  }

  .header-inner{
    flex:1;
    max-width:none;
  }

  .nav-toggle{
    display:flex;
  }

  .site-nav{
    position:fixed;
    top:var(--bar-h);
    left:0;
    right:0;
    z-index:999;
    max-height:calc(100vh - var(--bar-h));
    overflow-y:auto;
    background:var(--c-deep);
    border-bottom:var(--border) solid var(--c-neon);
    margin-top:0;
    padding:var(--sp-2) var(--sp-2) var(--sp-4);
    transform:translateY(-120%);
    visibility:hidden;
    transition:transform .35s var(--ease),visibility .35s;
  }

  .site-nav[data-open]{
    transform:translateY(0);
    visibility:visible;
  }

  .nav-list{
    gap:2px;
  }

  .nav-link{
    padding:13px 16px;
  }

  .header-track{
    display:none;
  }

  .header-top{
    position:fixed;
    right:16px;
    bottom:16px;
    width:48px;
    height:48px;
    padding:0;
    border-radius:50%;
    background:var(--c-deep);
    border:2px solid var(--c-neon);
    color:var(--c-neon);
    font-size:20px;
    box-shadow:6px 6px 0 rgba(255,255,255,.14);
  }

  /* Footer */
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:var(--sp-4);
  }

  .footer-brand-cell{
    grid-column:1 / -1;
  }
}

@media (max-width:767px){
  .page-container{
    padding-left:var(--sp-3);
    padding-right:var(--sp-3);
  }

  .page-section{
    padding-top:var(--sp-5);
    padding-bottom:var(--sp-5);
  }

  .section-panel{
    padding:var(--sp-4) var(--sp-3);
    box-shadow:6px 6px 0 rgba(11,31,58,.18);
  }

  .footer-grid{
    grid-template-columns:1fr;
    gap:var(--sp-4);
  }

  .footer-brand-cell{
    grid-column:auto;
  }

  .grid-cols-2,
  .grid-cols-3{
    grid-template-columns:1fr;
  }
}

/* ---------- Reveal Animation ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}

[data-reveal].is-revealed{
  opacity:1;
  transform:translateY(0);
}

/* ---------- User Preference: Reduced Motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }

  html{
    scroll-behavior:auto;
  }

  [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
}