:root{--header-offset:166px;--primary:#FF8C1A;--secondary:#FFA53A;--btn-gradient:linear-gradient(180deg,#FFA53A 0%,#D96800 100%);--card-bg:#17191F;--bg-dark:#0D0E12;--text-main:#FFF3E6;--border:#A84F0C;--glow:#FFB04D;--deep-orange:#D96800;--white:#fff;--black:#000;--danger:#e74c3c}html{scroll-behavior:smooth}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg-dark);color:var(--text-main);line-height:1.6;padding-top:var(--header-offset);overflow-x:hidden}.site-header{position:fixed;top:0;left:0;width:100%;min-height:auto;z-index:1000;background:var(--bg-dark);box-shadow:0 2px 10px rgba(0,0,0,0.8);display:flex;flex-direction:column}.header-top{background:var(--bg-dark);border-bottom:1px solid var(--border);width:100%}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 20px;min-height:68px}.logo{font-size:1.8rem;font-weight:800;color:var(--white);text-decoration:none;text-transform:uppercase;letter-spacing:1px;text-shadow:0 2px 4px rgba(0,0,0,0.3);line-height:1.2;display:inline-block}.logo:hover{color:var(--primary)}.desktop-nav-buttons{display:flex;align-items:center;gap:10px}.btn{display:inline-block;padding:8px 16px;border-radius:8px;color:var(--white);text-decoration:none;font-weight:700;font-size:1rem;transition:transform 0.2s ease,box-shadow 0.2s ease;box-shadow:0 2px 6px rgba(0,0,0,0.3)}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px var(--glow)}.btn-register{background:var(--btn-gradient);border:1px solid var(--primary)}.btn-login{background:var(--card-bg);border:1px solid var(--primary);color:var(--primary)}.btn-login:hover{background:var(--primary);color:var(--white)}.main-nav{width:100%;display:flex;background:var(--card-bg);border-top:1px solid var(--border);border-bottom:2px solid var(--primary)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;min-height:52px;gap:2px;flex-wrap:wrap}.nav-container a{color:var(--text-main);text-decoration:none;font-size:0.95rem;font-weight:600;padding:8px 12px;border-radius:4px;transition:background-color 0.3s ease,color 0.3s ease;white-space:nowrap;display:block}.nav-container a:hover{background-color:var(--primary);color:var(--black)}.hamburger-menu{display:none;background:none;border:none;cursor:pointer;padding:10px;flex-direction:column;gap:5px}.hamburger-menu span{display:block;width:22px;height:2px;background-color:var(--white);border-radius:2px;transition:transform 0.3s ease,opacity 0.3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-menu-overlay{display:none}.mobile-nav-buttons{display:none}@media(max-width:768px){:root{--header-offset:146px}.site-header{min-height:0}.header-top{min-height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 5px}.header-container{max-width:none;width:100%;justify-content:flex-start;padding:0 10px;min-height:60px}.logo{font-size:1.3rem;flex:1;text-align:center;order:2;padding:0 5px;display:block}.desktop-nav-buttons{display:none}.hamburger-menu{display:flex;order:1;z-index:1001;margin-right:auto;padding:8px;position:relative}.mobile-nav-buttons{display:flex;justify-content:center;align-items:center;gap:8px;padding:6px 12px;background:var(--bg-dark);border-top:1px solid var(--border);width:100%;z-index:1000;min-height:36px}.mobile-nav-buttons .btn{padding:8px 12px;font-size:0.85rem;flex:1;max-width:180px;text-align:center}.main-nav{display:none;position:fixed;top:60px;left:0;width:280px;max-width:85%;height:auto;bottom:auto;flex-direction:column;background:var(--card-bg);transform:translateX(-100%);transition:transform 0.3s ease;z-index:1000;border-top:none;border-right:2px solid var(--primary);padding-top:15px;overflow-y:auto}.main-nav.active{display:flex;transform:translateX(0);padding-bottom:20px}.nav-container{flex-direction:column;width:100%;max-width:none;padding:0 10px;min-height:auto;align-items:center;justify-content:flex-start}.nav-container a{width:100%;text-align:left;padding:12px 15px;border-bottom:1px solid rgba(255,255,255,0.1);color:var(--text-main);font-size:1rem}.mobile-menu-overlay{display:block;position:fixed;top:60px;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:999;opacity:0;visibility:hidden;transition:opacity 0.3s ease;pointer-events:none}.mobile-menu-overlay.active{opacity:1;visibility:visible;pointer-events:auto}.page-content img{max-width:100%!important;height:auto!important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.nav-container a:hover{background:var(--primary);color:var(--black)}.main-nav.active ~ .page-content{padding-top:146px}}.site-footer{background:var(--bg-dark);color:var(--text-main);padding:40px 20px 20px;border-top:3px solid var(--primary);width:100%}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;padding-bottom:20px}.footer-column h4{color:var(--primary);margin-bottom:15px;font-size:1.1rem;position:relative;padding-bottom:5px}.footer-column h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--primary)}.footer-brand .footer-logo{font-size:1.6rem;font-weight:800;color:var(--white);text-decoration:none;display:inline-block;margin-bottom:10px;text-transform:uppercase}.footer-brand .footer-logo:hover{color:var(--primary)}.footer-description{font-size:0.9rem;line-height:1.5;color:#ccc}.footer-links a,.footer-legal a{display:block;color:#ccc;text-decoration:none;font-size:0.9rem;padding:4px 0;transition:color 0.3s ease,padding-left 0.3s ease}.footer-links a:hover,.footer-legal a:hover{color:var(--primary);padding-left:5px}.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;font-size:0.85rem;color:#ccc;margin-top:20px}.footer-bottom a{color:var(--secondary);text-decoration:none}.no-scroll{overflow: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;
}