:root{--primary:#26A9E0;--primary-dark:#1a8bbd;--primary-light:#e1f4fb;--secondary:#FFFFFF;--accent-login:#EA7C07;--accent-register:#26A9E0;--dark:#000000;--text-dark:#333333;--text-light:#666666;--header-offset:122px}.site-header{position:fixed;top:0;left:0;width:100%;background-color:#FFFFFF;box-shadow:0 2px 15px rgba(0,0,0,0.25);z-index:1000;min-height:auto}.header-top{background-color:var(--primary);width:100%;display:flex}.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%;min-height:68px}.logo{display:inline-block;font-size:2rem;font-weight:800;color:#FFFFFF;text-decoration:none;letter-spacing:1px;line-height:1.2;text-transform:lowercase}.logo:hover{color:#FFFFFF;opacity:0.9}.desktop-nav-buttons{display:flex;align-items:center;gap:10px}.desktop-nav-buttons .btn{display:inline-block;padding:10px 24px;border-radius:6px;font-weight:700;font-size:0.9rem;text-decoration:none;text-align:center;transition:all 0.3s ease;letter-spacing:0.5px}.desktop-nav-buttons .btn-login{background-color:var(--accent-login);color:#FFFFFF;border:none}.desktop-nav-buttons .btn-login:hover{background-color:#d37006;color:#FFFFFF;transform:translateY(-2px);box-shadow:0 4px 12px rgba(234,124,7,0.4)}.desktop-nav-buttons .btn-register{background-color:var(--secondary);color:var(--primary-dark);border:none}.desktop-nav-buttons .btn-register:hover{background-color:#f4f4f4;color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 4px 12px rgba(38,169,224,0.3)}.main-nav{background-color:var(--primary-dark);width:100%;display:flex;min-height:52px}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;width:100%;flex-wrap:wrap}.nav-link{display:inline-block;padding:12px 16px;color:#FFFFFF;text-decoration:none;font-weight:500;font-size:0.95rem;transition:color 0.2s ease;line-height:1.4;white-space:nowrap}.nav-link:hover{color:#cceaf7;text-decoration:underline}.mobile-nav-buttons{display:none}.hamburger-menu{display:none}.mobile-menu-overlay{display:none}body{padding-top:var(--header-offset);margin:0}.site-footer{background-color:#1a252f;color:#c7d1dc;padding:60px 20px 20px}.footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:15px}.footer-logo{font-size:1.8rem;font-weight:800;color:var(--primary);text-decoration:none;letter-spacing:1px}.footer-logo:hover{color:var(--primary-light)}.footer-desc{font-size:0.9rem;line-height:1.8;color:#9fb3c8;margin:0}.footer-title{font-size:1.1rem;font-weight:600;color:var(--secondary);margin:0 0 15px 0;padding-bottom:10px;border-bottom:2px solid var(--primary)}.footer-nav{display:flex;flex-direction:column;gap:8px}.footer-nav a{color:#9fb3c8;text-decoration:none;font-size:0.9rem;transition:color 0.3s ease}.footer-nav a:hover{color:var(--primary)}.footer-bottom{max-width:1200px;margin:40px auto 0;border-top:1px solid #2d3a47;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}.footer-bottom p{font-size:0.85rem;color:#7e92a5;margin:0}.responsible-warning{font-style:italic}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;min-height:60px}.logo{font-size:1.6rem}.main-nav{display:none;position:fixed;top:0;right:0;width:280px;height:100%;background-color:#FFFFFF;flex-direction:column;justify-content:flex-start;align-items:stretch;padding-top:60px;transform:translateX(100%);transition:transform 0.3s ease;z-index:1001;box-shadow:-4px 0 20px rgba(0,0,0,0.15)}.main-nav.active{display:flex;transform:translateX(0)}.nav-container{max-width:none;flex-direction:column;align-items:stretch;padding:10px 0}.nav-link{padding:14px 20px;color:var(--text-dark);border-bottom:1px solid #f0f0f0;font-weight:500;text-align:left;white-space:normal}.nav-link:hover{color:var(--primary);background-color:#f5f9fc}.mobile-nav-buttons{display:flex;justify-content:center;gap:8px;padding:8px 10px;background-color:var(--primary-dark);width:100%;min-height:48px}.mobile-nav-buttons .btn{display:inline-block;padding:8px 18px;border-radius:6px;font-weight:700;font-size:0.8rem;text-decoration:none;text-align:center}.mobile-nav-buttons .btn-login{background-color:var(--accent-login);color:#FFFFFF;flex:1;max-width:130px}.mobile-nav-buttons .btn-register{background-color:var(--secondary);color:var(--primary-dark);flex:1;max-width:130px}.hamburger-menu{display:flex;position:absolute;top:14px;left:15px;width:32px;height:32px;flex-direction:column;justify-content:center;gap:5px;background-color:transparent;border:none;cursor:pointer;z-index:1002;padding:0}.hamburger-menu span{display:block;width:100%;height:3px;background-color:#FFFFFF;border-radius:3px;transition:transform 0.3s ease,opacity 0.3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg);background-color:var(--primary)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg);background-color:var(--primary)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.5);z-index:1000}.mobile-menu-overlay.active{display:block}.header-top{flex-wrap:wrap;position:relative}.desktop-nav-buttons{display:none}.footer-container{grid-template-columns:1fr;gap:30px}.footer-bottom{flex-direction:column;text-align:center;align-items:center}.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;
}