.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;box-shadow:0 4px 12px rgba(0,0,0,0.15);background:#ffffff}.header-top{background:linear-gradient(180deg,#b71c1c 0%,#c62828 100%);width:100%;min-height:68px;display:flex;align-items:center}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:30px;padding-right:30px;width:100%;box-sizing:border-box}.logo{font-size:2rem;font-weight:900;color:#ffffff;text-decoration:none;letter-spacing:1px;font-style:italic;text-shadow:2px 2px 4px rgba(0,0,0,0.3);display:block}.logo:hover{color:#ffd600}.desktop-nav-buttons{display:flex;align-items:center;gap:12px}.btn{display:inline-block;padding:10px 26px;font-size:0.95rem;font-weight:700;border-radius:50px;text-decoration:none!important;color:#ffffff;box-shadow:0 4px 15px rgba(0,0,0,0.2);transition:all 0.3s ease;cursor:pointer;text-align:center;border:none}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,0.35);color:#ffffff;text-decoration:none!important}.btn-register{background:linear-gradient(180deg,#FF5A4F 0%,#E53935 100%)}.btn-login{background:linear-gradient(180deg,#ffb300 0%,#ff6f00 100%)}.btn-download{background:linear-gradient(180deg,#FF5A4F 0%,#E53935 100%)}.main-nav{background:#c62828;width:100%;min-height:52px;display:flex;align-items:center;border-top:1px solid rgba(255,255,255,0.15)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding-left:20px;padding-right:20px;width:100%;box-sizing:border-box;flex-wrap:wrap}.nav-menu{display:flex;flex-direction:row;justify-content:center;align-items:center;gap:6px;flex-wrap:wrap}.nav-link{color:#ffffff;text-decoration:none;font-size:0.95rem;font-weight:600;padding:10px 16px;border-radius:4px;transition:all 0.3s ease;white-space:nowrap;position:relative}.nav-link::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:0;height:3px;background:#ffd600;border-radius:2px;transition:width 0.3s ease}.nav-link:hover{color:#ffd600;background:rgba(0,0,0,0.2)}.nav-link:hover::after{width:60%}.hamburger-menu{display:none;background:none;border:none;cursor:pointer;padding:10px;z-index:1002;outline:none}.hamburger-menu span{display:block;width:28px;height:3px;background:#ffffff;margin:5px 0;border-radius:3px;transition:all 0.3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.mobile-menu-overlay{display:none}.mobile-nav-buttons{display:none}.site-footer{background:#1a1a2e;color:#e0e0e0;padding:60px 0 0;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;margin-top:100px}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:50px;padding:0 30px 50px}.footer-logo{font-size:2rem;font-weight:900;color:#ffffff;text-decoration:none;font-style:italic;letter-spacing:1px}.footer-logo:hover{color:#ffd600}.footer-desc{font-size:0.92rem;line-height:1.8;color:#b0b0b0;margin-top:20px}.footer-column h4.footer-heading{color:#ffffff;font-size:1.15rem;font-weight:700;position:relative;padding-bottom:18px}.footer-column h4.footer-heading::after{content:'';position:absolute;bottom:10px;left:0;width:50px;height:3px;background:#E53935;border-radius:2px}.footer-nav{display:flex;flex-direction:column;gap:0}.footer-nav a{color:#cfcfcf;text-decoration:none;font-size:0.92rem;padding:7px 0;transition:color 0.3s ease}.footer-nav a:hover{color:#ffd600;padding-left:8px}.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:25px 0;text-align:center}.footer-bottom p{color:#b0b0b0;font-size:0.85rem}:root{--header-offset:122px}body{padding-top:var(--header-offset)}@media(max-width:768px){:root{--header-offset:110px}.header-container{padding:0 15px}.site-footer .footer-container{grid-template-columns:1fr 1fr;gap:30px;padding:0 20px 40px}}@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}}@media(max-width:768px){.site-header{background:#c62828}.main-nav,.site-footer .footer-bottom,.footer-bottom p{color:#333333}.header-top{background:linear-gradient(180deg,#c62828 0%,#b71c1c 100%);min-height:60px;display:flex;align-items:center}.header-container{justify-content:center;position:relative;min-height:60px;padding:0 10px}.logo{flex:0 0 auto;font-size:1.7rem;margin:0}.desktop-nav-buttons{display:none}.main-nav{display:none;position:fixed;top:0;left:0;height:100vh;width:280px;flex-direction:column;align-items:flex-start;justify-content:flex-start;padding-top:0;z-index:1001;transition:transform 0.3s ease;overflow-y:auto;overflow-x:hidden;background:#c62828}.main-nav .nav-container{width:100%;max-width:none;display:block;padding:0;flex-direction:column;align-items:flex-start}.nav-menu{flex-direction:column;align-items:center;gap:0;padding:80px 10px 20px;width:100%}.nav-menu .nav-link{display:block;width:100%;text-align:right;padding:13px 30px;border-bottom:1px solid rgba(255,255,255,0.1);font-size:1rem;color:#ffffff;background:transparent;white-space:normal;position:relative}.nav-menu .nav-link::before{content:'';position:absolute;right:10px;bottom:0;top:0;width:0;display:none}.nav-menu .nav-link::after{display:none}.nav-menu .nav-link:hover{background:rgba(0,0,0,0.2);color:#ffd600;padding-left:30px}.hamburger-menu{display:block;position:absolute;left:12px;top:50%;transform:translateY(-50%);z-index:1002}.hamburger-menu span{background:#ffffff}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:99;opacity:0;pointer-events:none}.mobile-menu-overlay.active{display:block;opacity:1;pointer-events:auto}.main-nav.active{display:block;transform:translateX(0)}.mobile-nav-buttons{display:flex;flex-direction:row;justify-content:center;align-items:center;gap:10px;padding:10px 15px;background:#c62828;border-top:1px solid rgba(255,255,255,0.2);position:relative;z-index:1000}.mobile-nav-buttons .btn{flex:1;padding:9px 12px;font-size:0.9rem}.site-footer .footer-container{grid-template-columns:1fr;gap:20px;padding:0 15px 40px}.site-footer .site-footer{margin-top:50px}.footer-bottom p{color:#b0b0b0!important;color:#777;color:#b0b0b0!important}}@media(max-width:768px){.nav-menu{display:flex;flex-direction:column;align-items:stretch;justify-content:center;gap:0}}@media(max-width:768px){.main-nav .nav-menu{display:flex;gap:0}.main-nav .nav-link::after{display:none}.main-nav .nav-link::before{content:'\203A';position:absolute;left:15px;top:50%;transform;transform:translateY(-50%);font-size:1.2em;color:#ffb300;display:block}}
/* 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;
}