/* ============================================
   site.css — 188金宝搏 共享样式表
   金红轨迹 · 数据叙事型框架
   ============================================ */

/* ---------- RESET ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;text-size-adjust:100%;-webkit-text-size-adjust:100%}
body{min-height:100vh;background:#1A1A1A;color:#F5F5F5;font-family:'Inter',sans-serif;font-weight:400;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,svg{display:block;max-width:100%}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}
input,textarea{font:inherit}
h1,h2,h3,h4,h5,h6{font-weight:800;font-style:italic;letter-spacing:-0.02em;line-height:1.2}
:focus-visible{outline:2px solid #C9A84C;outline-offset:2px;border-radius:2px}

/* ---------- CSS VARIABLES ---------- */
:root{
  --primary-grad:linear-gradient(135deg,#E8B800,#D62828);
  --primary-grad-light:linear-gradient(135deg,#F0C800,#E84848);
  --dark-bg:#1A1A1A;
  --mid-bg:#2D2D2D;
  --accent-gold:#C9A84C;
  --accent-red:#D62828;
  --text-light:#F5F5F5;
  --text-dark:#121212;
  --border-light:#E0E0E0;
  --font-head:'Inter',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-accent:'JetBrains Mono',monospace;
  --content-max:1200px;
  --space-sm:0.75rem;
  --space-md:1.5rem;
  --space-lg:3rem;
  --space-xl:5rem;
  --radius-sm:4px;
  --radius-md:8px;
  --transition:0.2s ease;
  --header-h:72px;
}

/* ---------- UTILITY ---------- */
.visually-hidden:not(:focus):not(:active){
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0
}

/* ---------- SKIP LINK ---------- */
.skip-link{
  position:absolute;top:-100%;left:1rem;z-index:10000;padding:0.5rem 1.2rem;background:var(--primary-grad);color:#fff;font-weight:600;border-radius:0 0 var(--radius-sm) var(--radius-sm);transition:top 0.2s
}
.skip-link:focus{top:0}

/* ---------- SCROLL PROGRESS ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:9999;width:0%;height:4px;background:var(--primary-grad);transition:width 0.15s linear;will-change:width;pointer-events:none
}
@media(prefers-reduced-motion:reduce){.scroll-progress{transition:none}}

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;background:var(--dark-bg);border-bottom:2px solid rgba(201,168,76,0.25);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)
}
.header-frame{
  display:flex;align-items:center;justify-content:space-between;max-width:var(--content-max);margin:0 auto;padding:0 var(--space-md);height:var(--header-h);gap:var(--space-md)
}
.header-brand{flex-shrink:0}
.brand-logo{
  display:inline-block;font-size:1.8rem;font-weight:800;font-style:italic;letter-spacing:-0.03em;background:var(--primary-grad);-webkit-background-clip:text;background-clip:text;color:transparent;padding:0.2em 0;line-height:1
}
.brand-logo::after{content:none}

/* ---------- HEADER NAV ---------- */
.header-nav ul{display:flex;align-items:center;gap:0.25rem}
.header-nav a{
  display:inline-block;padding:0.4rem 1rem;font-weight:500;font-size:0.95rem;color:rgba(245,245,245,0.8);border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition),box-shadow var(--transition);position:relative
}
.header-nav a::after{
  content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:var(--primary-grad);border-radius:2px;transition:width var(--transition)
}
.header-nav a:hover{color:#fff;background:rgba(201,168,76,0.08)}
.header-nav a:hover::after{width:60%}
.header-nav a[aria-current="page"]{color:#fff;font-weight:700}
.header-nav a[aria-current="page"]::after{width:80%}
.header-nav li+li{position:relative}
.header-nav li+li::before{
  content:'/';display:inline-block;color:rgba(201,168,76,0.35);font-weight:300;font-size:1.1rem;padding:0 0.15rem;vertical-align:middle
}

/* ---------- HEADER ACTIONS ---------- */
.header-actions{display:flex;align-items:center;gap:0.5rem;flex-shrink:0}
.search-toggle{
  display:flex;align-items:center;justify-content:center;width:40px;height:40px;color:rgba(245,245,245,0.6);border-radius:50%;transition:color var(--transition),background var(--transition);pointer-events:none
}
.search-toggle svg{width:20px;height:20px}

/* ---------- NAV TOGGLE ---------- */
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;gap:5px;padding:8px;border-radius:var(--radius-sm);transition:background var(--transition)
}
.nav-toggle__line{
  display:block;width:26px;height:3px;background:var(--text-light);border-radius:2px;transition:transform var(--transition),opacity var(--transition)
}
.nav-toggle:hover{background:rgba(201,168,76,0.12)}

/* ---------- MOBILE NAV ---------- */
@media(max-width:768px){
  .nav-toggle{display:flex}
  .header-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:rgba(26,26,26,0.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:var(--space-lg) var(--space-md);opacity:0;visibility:hidden;transform:translateY(-12px);transition:opacity 0.3s,visibility 0.3s,transform 0.3s;overflow-y:auto;z-index:999
  }
  .header-nav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .header-nav ul{flex-direction:column;align-items:stretch;gap:0}
  .header-nav li+li::before{display:none}
  .header-nav a{
    display:block;padding:1rem 1.2rem;font-size:1.2rem;border-bottom:1px solid rgba(255,255,255,0.06);border-radius:0
  }
  .header-nav a::after{display:none}
  .header-nav a[aria-current="page"]{background:rgba(214,40,40,0.12);border-left:4px solid var(--accent-red);padding-left:calc(1.2rem - 4px)}
  .search-toggle{pointer-events:none;opacity:0.4}
}

@media(max-width:480px){
  .header-frame{padding:0 var(--space-sm)}
  .brand-logo{font-size:1.4rem}
}

/* ---------- FOOTER ---------- */
.site-footer{
  background:var(--mid-bg);border-top:2px solid rgba(201,168,76,0.15);padding:var(--space-xl) var(--space-md) 0;margin-top:var(--space-xl)
}
.footer-frame{
  display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--space-lg);max-width:var(--content-max);margin:0 auto;padding-bottom:var(--space-lg)
}
.footer-heading{
  font-size:0.85rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--accent-gold);margin-bottom:var(--space-sm);font-style:normal;font-weight:600
}
.footer-list{display:flex;flex-direction:column;gap:0.5rem}
.footer-list a{color:rgba(245,245,245,0.75);transition:color var(--transition),padding-left var(--transition)}
.footer-list a:hover{color:#fff;padding-left:4px}
.footer-list li{font-size:0.92rem;line-height:1.5;color:rgba(245,245,245,0.7)}
.footer-note{font-size:0.82rem;color:rgba(245,245,245,0.5);margin-top:0.25rem;font-style:italic}
.footer-tagline{font-size:0.95rem;color:rgba(245,245,245,0.55);margin-top:0.4rem;font-weight:400;font-style:normal}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);padding:var(--space-md) 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--space-sm);max-width:var(--content-max);margin:0 auto;font-size:0.82rem;color:rgba(245,245,245,0.5)
}
@media(max-width:768px){
  .footer-frame{grid-template-columns:1fr;gap:var(--space-md)}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* ---------- CONTAINER ---------- */
.container{max-width:var(--content-max);margin:0 auto;padding:0 var(--space-md)}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:0.5rem;padding:0.7rem 1.8rem;border-radius:var(--radius-md);font-weight:600;font-size:0.95rem;transition:all var(--transition);text-align:center;line-height:1.2;min-height:44px
}
.btn-primary{background:var(--primary-grad);color:#fff;border:none}
.btn-primary:hover{filter:brightness(1.12);transform:translateY(-1px);box-shadow:0 8px 24px rgba(214,40,40,0.25)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:transparent;color:var(--text-light);border:2px solid transparent;background-image:var(--primary-grad);background-origin:border-box;background-clip:padding-box,border-box;position:relative}
.btn-secondary::before{content:'';position:absolute;inset:0;border-radius:calc(var(--radius-md) - 2px);background:var(--dark-bg);z-index:0;transition:opacity var(--transition)}
.btn-secondary span{position:relative;z-index:1}
.btn-secondary:hover::before{opacity:0.85}
.btn-secondary:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(201,168,76,0.2)}

/* ---------- BREADCRUMB ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:0.4rem;font-size:0.85rem;color:rgba(245,245,245,0.6);padding:var(--space-sm) 0
}
.breadcrumb a{color:var(--accent-gold);transition:color var(--transition)}
.breadcrumb a:hover{color:#fff}
.breadcrumb li{display:flex;align-items:center;gap:0.4rem}
.breadcrumb li+li::before{content:'/';color:rgba(245,245,245,0.25)}

/* ---------- CARD ---------- */
.card{
  background:var(--mid-bg);border-radius:var(--radius-md);padding:var(--space-md);border:1px solid rgba(255,255,255,0.06);transition:border-color var(--transition),transform var(--transition);position:relative;overflow:hidden
}
.card:hover{border-color:rgba(201,168,76,0.3);transform:translateY(-3px)}
.card__title{font-size:1.25rem;margin-bottom:0.5rem;color:var(--text-light)}
.card__desc{font-size:0.92rem;color:rgba(245,245,245,0.7);line-height:1.6}
.card::after{
  content:'';position:absolute;top:0;left:0;width:4px;height:0;background:var(--primary-grad);transition:height 0.3s
}
.card:hover::after{height:100%}

/* ---------- TAG ---------- */
.tag{
  display:inline-block;padding:0.2rem 0.8rem;border-radius:100px;font-size:0.75rem;font-weight:600;letter-spacing:0.02em;text-transform:uppercase
}
.tag--gold{background:rgba(201,168,76,0.18);color:var(--accent-gold)}
.tag--gray{background:rgba(255,255,255,0.08);color:rgba(245,245,245,0.7)}

/* ---------- PROGRESS BAR ---------- */
.progress-bar{
  width:100%;height:8px;background:rgba(255,255,255,0.08);border-radius:100px;overflow:hidden
}
.progress-bar__fill{
  height:100%;background:var(--primary-grad);border-radius:100px;transition:width 0.4s;width:0%
}

/* ---------- DIVIDER ---------- */
.divider{
  width:100%;height:1px;background:linear-gradient(90deg,transparent,rgba(201,168,76,0.3),transparent);margin:var(--space-lg) 0;border:none
}
.divider--slant{height:2px;background:var(--primary-grad);transform:skewY(-1.5deg);width:110%;margin-left:-5%}

/* ---------- GRID ---------- */
.grid{display:grid;gap:var(--space-md)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media(max-width:768px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}}
@media(min-width:769px) and (max-width:1024px){.grid--3{grid-template-columns:1fr 1fr}.grid--4{grid-template-columns:1fr 1fr}}

/* ---------- DATA DISPLAY ---------- */
.data-stat{display:flex;flex-direction:column;gap:0.25rem}
.data-stat__value{font-size:2.4rem;font-weight:800;font-style:italic;letter-spacing:-0.03em;background:var(--primary-grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.data-stat__label{font-size:0.85rem;color:rgba(245,245,245,0.6);text-transform:uppercase;letter-spacing:0.04em}

/* ---------- TIMELINE ---------- */
.timeline{position:relative;padding-left:2rem}
.timeline::before{content:'';position:absolute;left:6px;top:0;bottom:0;width:2px;background:var(--primary-grad);opacity:0.4}
.timeline__item{position:relative;padding-bottom:var(--space-md)}
.timeline__item::before{content:'';position:absolute;left:-1.65rem;top:0.35rem;width:12px;height:12px;border-radius:50%;background:var(--accent-gold);border:2px solid var(--dark-bg)}

/* ---------- RESPONSIVE ---------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms!important;animation-duration:0.01ms!important;transform:none!important}
  .scroll-progress{display:none}
}

@media(max-width:480px){
  :root{--header-h:60px;--space-lg:2rem;--space-xl:3rem}
  .brand-logo{font-size:1.3rem}
  .btn{padding:0.6rem 1.4rem;font-size:0.9rem;min-height:40px}
}

@media(min-width:769px) and (max-width:1024px){
  .header-nav a{padding:0.3rem 0.7rem;font-size:0.88rem}
}