.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#FFFFFF;box-shadow:0 4px 20px rgba(31,45,61,0.12);border-bottom:2px solid #D6E2FF;min-height:auto;transition:box-shadow 0.3s ease}.site-header *{box-sizing:border-box}.header-top{background:#FFFFFF;width:100%}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 40px}.logo{font-size:36px;font-weight:900;color:#1F2D3D;text-decoration:none;letter-spacing:2px;line-height:1.2;transition:color 0.3s;text-transform:uppercase}.logo:hover{color:#2F6BFF}.header-top .desktop-nav-buttons{display:flex;justify-content:flex-end;align-items:center;gap:12px;margin-left:auto;padding-left:20px}.btn{display:inline-block;padding:10px 26px;border-radius:25px;text-decoration:none!important;font-weight:700;font-size:14px;line-height:1.4;text-align:center;transition:transform 0.3s,box-shadow 0.3s,opacity 0.3s;cursor:pointer;white-space:nowrap}.btn-login{background:#FFFFFF;color:#2F6BFF;border:2px solid #2F6BFF}.btn-login:hover{background:#F4F7FB;transform:translateY(-2px);box-shadow:0 6px 18px rgba(47,107,255,0.25)}.btn-register{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF;border:none;box-shadow:0 6px 16px rgba(47,107,255,0.35)}.btn-register:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 10px 24px rgba(47,107,255,0.4)}.main-nav{display:flex!important;flex-direction:row!important;justify-content:center;align-items:center;width:100%;background:#FFFFFF;border-top:1px solid #D6E2FF;box-shadow:0 2px 8px rgba(0,0,0,0.05);padding:0;top:auto;left:auto;height:auto;min-height:auto;transition:box-shadow 0.3s}.site-header:not(.active) .main-nav{box-shadow:0 2px 8px rgba(0,0,0,0.05)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;flex-wrap:wrap;padding:0 20px;gap:0 4px}.mobile-nav-header{display:none}.nav-link{display:inline-block;padding:14px 16px;color:#1F2D3D;text-decoration:none;font-weight:600;font-size:15px;line-height:1.4;transition:color 0.3s;border-bottom:3px solid transparent;letter-spacing:0.2px;white-space:nowrap}.nav-link:hover{color:#2F6BFF;border-bottom-color:#2F6BFF;background:rgba(47,107,255,0.05)}.nav-link.active{color:#2F6BFF;border-bottom-color:#2F6BFF;font-weight:700}.mobile-nav-buttons{display:none}.mobile-menu-overlay{display:none}.site-footer{background:#1F2D3D;color:#F4F7FB;border-top:4px solid #2F6BFF;clear:both}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1.4fr 1fr;gap:40px;padding:55px 20px 40px 20px}.footer-column{padding:0}.footer-brand{font-size:32px;font-weight:900;color:#FFFFFF;text-decoration:none;display:inline-block;margin-bottom:20px;letter-spacing:1px;transition:transform 0.3s;line-height:1.3}.footer-brand:hover{color:#6FA3FF;transform:translateY(-2px)}.footer-desc{font-size:14px;line-height:1.6;color:#B0C4D6;margin-bottom:25px}.footer-title{font-size:17px;font-weight:800;color:#FFFFFF;margin-bottom:18px;letter-spacing:0.5px;position:relative;padding-bottom:10px}.footer-title:after{content:none;display:none}.footer-links{list-style:none;margin:0;padding:0}.footer-links li{margin-bottom:12px}.footer-link{color:#B0C4D6;text-decoration:none;font-size:14px;transition:color 0.3s,padding-left 0.3s;line-height:1.5}.footer-link:hover{color:#FFFFFF;padding-left:5px}.footer-bottom{background:rgba(0,0,0,0.3);padding:18px 10px;text-align:center;border-top:1px solid rgba(255,255,255,0.1)}.copyright-text{font-size:13px;color:#B0C4D6}.copyright-text span{color:#FFFFFF}@media (min-width:769px){.site-footer .footer-container{display:grid}}@media (max-width:768px){:root{--header-offset:110px}body{padding-top:var(--header-offset)}.page-content img{max-width:100%!important;height:auto!important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.site-header{position:fixed}.header-top{padding:0;border-bottom:1px solid #D6E2FF}.header-container{width:100%;max-width:none;padding:8px 20px;display:flex;flex-direction:row;align-items:center;justify-content:space-between}.logo{order:2;font-size:28px;flex:0 0 auto;margin:0 auto;position:static;text-align:center}.content-spacer{display:none}.content-left{order:1}.header-top .desktop-nav-buttons{display:none}.main-nav{display:none!important;position:fixed;top:0;left:0;width:300px;max-width:80%;height:100vh;height:100dvh;background:#FFFFFF;z-index:1100;flex-direction:column!important;justify-content:flex-start!important;align-items:stretch!important;transform:translateX(-100%);transition:transform 0.3s ease,box-shadow 0.3s ease;border:none;box-shadow:4px 0 24px rgba(0,0,0,0.15);border-radius:0;overflow-y:auto;padding-bottom:20px}.main-nav.active{display:flex!important;transform:translateX(0);box-shadow:0 0 30px rgba(0,0,0,0.2)}.main-nav.active .mobile-nav-buttons{display:flex;flex-direction:row;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap;padding:16px 20px 20px;background:#F8F9FF;border-top:1px solid #D6E2FF}.main-nav.active .mobile-nav-buttons .btn{padding:8px 20px;font-size:13px}.nav-container{width:100%;max-width:none;display:flex;flex-direction:column;align-items:flex-start;padding:0;margin:0}.mobile-nav-header{display:flex!important;flex-direction:row;justify-content:space-between;align-items:center;width:100%;padding:15px 15px 14px 15px;background:#2F6BFF;position:sticky;top:0;z-index:10}.mobile-nav-header .mobile-logo{font-size:24px;font-weight:900;color:#FFFFFF;text-decoration:none}.hamburger-menu{display:block!important;background:transparent;border:none;cursor:pointer;width:36px;height:30px;padding:5px;z-index:1102}.hamburger-menu span{display:block;width:100%;height:2px;background:#FFFFFF;margin:5px 0;border-radius:2px;transition:0.3s;-webkit-transition:0.3s}.hamburger-menu.hamburger-active span:nth-child(1){transform:translateY(6px) rotate(45deg)}.hamburger-menu.hamburger-active span:nth-child(2){opacity:0}.hamburger-menu.hamburger-active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.hamburger-menu.hamburger-active span{transition:0.3s}.h75{display:block;background:transparent;border:none;cursor:pointer;width:44px;height:44px;position:relative;z-index:1101;padding:8px;margin:5px}.h75 span{display:block;width:100%;height:2.5px;background:#2F6BFF;margin:5px 0;border-radius:2px;transition:0.3s}.h75.hamburger-active span{background:#FFFFFF}.h75.hamburger-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}.h75.hamburger-active span:nth-child(2){opacity:0}.h75.hamburger-active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.hamburger-btn-active span{background:#FFFFFF!important}.hamburger-btn-active span:nth-child(1){transform:translateY(6px) rotate(45deg)}.hamburger-btn-active span:nth-child(2){opacity:0}.hamburger-btn-active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.nav-link{display:block;width:100%;padding:13px 20px 13px 20px;border-left:none;font-size:15px;border-bottom:1px solid #EDF1F7;text-align:left}.nav-link:hover,.nav-link.active{background:#F0F5FF;border-bottom-color:#2F6BFF;color:#2F6BFF}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(15,23,42,0.6);z-index:1095;backdrop-filter:blur(2px);transition:opacity 0.3s}.mobile-menu-overlay.active{display:block}.sticky-header-pad{display:block;width:100%;height:0}.site-footer{padding-top:30px}.footer-container{grid-template-columns:1fr 1fr;gap:30px 20px;padding:40px 15px 30px 15px}.footer-bottom{padding:16px 5px}.footer-brand{font-size:28px}.footer-desc{font-size:13px;line-height:1.5;max-width:240px}.footer-title{font-size:15px}.footer-links li{margin-bottom:9px}.footer-link{font-size:13px}}@media (max-width:480px){.header-container{padding:10px 12px}.logo{font-size:24px}.nav-container{gap:0}.footer-container{grid-template-columns:1fr;gap:28px;padding:35px 15px 25px 15px;text-align:center}.site-footer .footer-column{align-items:center}.footer-desc{max-width:100%;margin:0 auto 20px auto}.footer-bottom .copyright-text{font-size:12px;display:block}.main-nav.active .mobile-nav-buttons{display:flex}}
/* 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;
}