:root{
  --header-offset: 122px;
  --primary-color:#C91F17;
  --secondary-color:#E53935;
  --button-grad:linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg:#D32F2F;
  --bg-color:#B71C1C;
  --text-main:#FFF5E1;
  --border-color:#F2B544;
  --glow-color:#FFCC66;
  --gold-color:#F4D34D;
  --deep-red:#7A0E0E;
}
.site-header{
  position: fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  box-shadow:0 2px 12px rgba(0,0,0,0.5);
  min-height:auto;
}
.header-top{
  background-color:var(--deep-red);
  width:100%;
}
.header-container{
  max-width:1200px;
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 30px;
  gap:15px;
}
.logo{
  font-size:2rem;
  font-weight:900;
  color:var(--gold-color);
  text-shadow:0 0 12px var(--glow-color);
  text-decoration:none;
  letter-spacing:1px;
  flex-shrink:0;
  background:linear-gradient(180deg,#FFF5E1 0%,var(--gold-color) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.desktop-nav-buttons{
  display:flex;
  gap:12px;
  align-items:center;
}
.btn{
  display:inline-block;
  padding:10px 24px;
  border-radius:50px;
  font-size:1rem;
  font-weight:700;
  text-decoration:none;
  text-align:center;
  border:none;
  cursor:pointer;
  transition:transform 0.2s ease, box-shadow 0.2s ease;
  line-height:1.4;
}
.btn:hover{
  transform:translateY(-2px);
  box-shadow:0 4px 15px rgba(0,0,0,0.3);
}
.btn-register{
  background:var(--button-grad);
  color:#333;
}
.btn-download{
  background:var(--primary-color);
  color:#fff;
  border:1px solid var(--gold-color);
}
.main-nav{
  background-color:var(--primary-color);
  width:100%;
  display:flex;
  position:static;
  flex-direction:row;
  transform:none;
  transition:none;
}
.nav-container{
  max-width:1200px;
  margin:0 auto;
  display:flex;
  flex-direction:row;
  justify-content:center;
  align-items:center;
  gap:4px;
  padding:8px 20px;
  flex-wrap:wrap;
  width:100%;
}
.nav-link{
  color:var(--text-main);
  text-decoration:none;
  font-size:1rem;
  font-weight:600;
  padding:8px 14px;
  border-radius:4px;
  transition:background-color 0.2s, color 0.2s;
  white-space:nowrap;
}
.nav-link:hover{
  background-color:rgba(255,255,255,0.2);
  color:#fff;
}
.hamburger-menu{
  display:none;
}
.mobile-menu-overlay{
  display:none;
}
.mobile-nav-buttons{
  display:none;
}
.site-footer{
  background:linear-gradient(180deg,var(--deep-red) 0%, #5a0909 100%);
  color:var(--text-main);
  padding-top:50px;
  margin-top:80px;
}
.footer-container{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:40px;
  padding:0 30px 40px;
}
.footer-brand .footer-logo{
  font-size:2.2rem;
  font-weight:900;
  color:var(--gold-color);
  text-decoration:none;
  text-shadow:0 0 15px var(--glow-color);
}
.footer-description{
  margin-top:15px;
  line-height:1.6;
  font-size:0.95rem;
  opacity:0.9;
}
.footer-title{
  font-size:1.2rem;
  font-weight:700;
  color:var(--gold-color);
  margin-bottom:20px;
  position:relative;
  padding-bottom:8px;
}
.footer-title::after{
  content:'';
  position:absolute;
  bottom:0;
  left:0;
  width:40px;
  height:2px;
  background:var(--gold-color);
}
.footer-nav{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-nav li{
  margin-bottom:12px;
}
.footer-nav a{
  color:var(--text-main);
  text-decoration:none;
  transition:color 0.2s,padding-left 0.2s;
  font-size:0.95rem;
}
.footer-nav a:hover{
  color:var(--gold-color);
  padding-left:5px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.15);
  padding:20px 30px;
  text-align:center;
  font-size:0.9rem;
}
body{
  padding-top:var(--header-offset);
  overflow-x:hidden;
}
@media (max-width:768px){
  :root{
    --header-offset:110px;
  }
  .site-header{
    min-height:auto;
  }
  .header-top{
    background-color:var(--deep-red);
  }
  .header-container{
    width:100%;
    max-width:none;
    padding-left:10px;
    padding-right:10px;
    justify-content:space-between;
    gap:10px;
    display:flex;
  }
  .header-container .logo{
    order:2;
    display:block;
    margin:0 auto;
  }
  .hamburger-menu{
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    gap:5px;
    background:transparent;
    border:2px solid var(--gold-color);
    border-radius:6px;
    width:42px;
    height:42px;
    cursor:pointer;
    z-index:1001;
    order:1;
    padding:0;
    flex-shrink:0;
  }
  .hamburger-menu span{
    display:block;
    width:22px;
    height:2px;
    background-color:var(--gold-color);
    transition:all 0.3s ease;
  }
  .hamburger-menu.active span:nth-child(1){
    transform:rotate(45deg) translate(5px,5px);
  }
  .hamburger-menu.active span:nth-child(2){
    opacity:0;
  }
  .hamburger-menu.active span:nth-child(3){
    transform:rotate(-45deg) translate(5px,-5px);
  }
  .header-container .desktop-nav-buttons{
    display:none;
  }
  .main-nav{
    display:none;
    position:fixed;
    top:0;
    left:0;
    width:80%;
    max-width:340px;
    height:100vh;
    background-color:var(--bg-color);
    flex-direction:column;
    justify-content:flex-start;
    align-items:flex-start;
    padding-top:80px;
    transform:translateX(-100%);
    transition:transform 0.3s ease;
    box-shadow:4px 0 15px rgba(0,0,0,0.3);
    z-index:1000;
    overflow-y:auto;
  }
  .main-nav.active{
    display:flex;
    transform:translateX(0);
  }
  .nav-container{
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:0;
    width:100%;
  }
  .nav-link{
    display:block;
    width:100%;
    padding:14px 25px;
    font-size:1.1rem;
    border-bottom:1px solid rgba(255,255,255,0.1);
    color:var(--text-main);
  }
  .mobile-menu-overlay{
    display:none;
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-color:rgba(0,0,0,0.6);
    z-index:999;
  }
  .mobile-menu-overlay.active{
    display:block;
  }
  .mobile-nav-buttons{
    display:flex;
    justify-content:center;
    gap:10px;
    padding:8px 15px;
    background:linear-gradient(180deg,var(--deep-red) 0%, var(--bg-color) 100%);
    border-top:1px solid var(--gold-color);
    z-index:998;
    position:relative;
    min-height:48px;
    align-items:center;
  }
  .mobile-nav-buttons .btn{
    flex:1;
    max-width:180px;
    padding:8px 16px;
    font-size:0.9rem;
  }
  body{
    padding-top:var(--header-offset);
  }
  .site-footer .footer-container{
    grid-template-columns:1fr;
    gap:30px;
    padding-left:20px;
    padding-right:20px;
  }
  .page-content img{
    max-width:100% !important;
    height:auto !important;
    display:block;
  }
  .page-content{
    overflow-x:hidden;
    max-width:100%;
  }
  body{
    overflow-x:hidden;
  }
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}
/* 内容保护（系统追加，请勿删除） */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}