:root{--header-offset:122px;--primary:#113B7A;--secondary:#1D5FD1;--btn-gradient:linear-gradient(180deg,#2B73F6 0%,#1144A6 100%);--card-bg:#10233F;--text-main:#F3F8FF;--text-secondary:#AFC4E8;--border-color:#244D84;--glow:#4FA8FF;--gold:#F2C14E;--divider:#1B3357;--deep-navy:#08162B}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background-color:var(--deep-navy);box-shadow:0 4px 20px rgba(0,0,0,.5);min-height:auto;font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif}.header-top{background:linear-gradient(135deg,#0a1e3f,#113B7A);width:100%;border-bottom:1px solid var(--divider)}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:14px 24px;gap:16px}.logo{display:block;font-size:1.75rem;font-weight:800;color:#fff;text-decoration:none;letter-spacing:.5px;line-height:1.2;background:linear-gradient(90deg,#F2C14E,#FFE4A0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;text-shadow:0 0 20px rgba(242,193,78,.3);white-space:nowrap}.desktop-nav-buttons{display:flex;align-items:center;gap:10px;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 20px;border-radius:8px;font-size:.88rem;font-weight:700;text-decoration:none;border:none;cursor:pointer;transition:all .3s ease;min-height:38px;line-height:1.2;white-space:nowrap}.btn-register{background:var(--btn-gradient);color:#fff;box-shadow:0 4px 15px rgba(43,115,246,.4)}.btn-register:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(43,115,246,.6);filter:brightness(1.1)}.btn-login{background:linear-gradient(180deg,#f2c14e,#d49a2a);color:#08162B;box-shadow:0 4px 15px rgba(242,193,78,.3)}.btn-login:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(242,193,78,.5);filter:brightness(1.05)}.btn-download{background:linear-gradient(180deg,#4fa8ff,#1d5fd1);color:#fff;box-shadow:0 4px 15px rgba(79,168,255,.3)}.btn-download:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(79,168,255,.5);filter:brightness(1.05)}.main-nav{background-color:#0e2a52;width:100%;display:flex;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}.nav-container::-webkit-scrollbar{display:none}.nav-menu{display:flex;flex-direction:row;list-style:none;margin:0;padding:0;gap:4px}.nav-item{position:relative}.nav-link{display:block;padding:12px 14px;color:var(--text-main);text-decoration:none;font-size:.9rem;font-weight:600;transition:color .3s;white-space:nowrap}.nav-link:hover{color:var(--gold)}.nav-item.active .nav-link{color:var(--gold)}.mobile-nav-buttons{display:none}.hamburger-menu{display:none;position:fixed;top:18px;left:12px;z-index:1001;width:36px;height:36px;background:rgba(255,255,255,.1);border-radius:8px;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;backdrop-filter:none;border:none;padding:0}.hamburger-menu span{width:20px;height:2px;background:#fff;border-radius:2px;transition:transform .3s ease,opacity .3s ease;display:block}.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}body{padding-top:var(--header-offset);margin:0;background-color:#08162B}.site-footer{background:var(--deep-navy);color:var(--text-main);font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif;border-top:3px solid var(--primary);margin-top:auto}.site-footer a{color:var(--text-secondary);text-decoration:none;transition:color .3s}.site-footer a:hover{color:var(--gold)}.footer-container{max-width:1200px;margin:0 auto;padding:60px 24px 30px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--divider)}.footer-logo{font-size:1.6rem;font-weight:800;color:#fff;background:linear-gradient(90deg,#F2C14E,#FFE4A0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline-block;margin-bottom:16px;text-decoration:none}.footer-desc{color:var(--text-secondary);font-size:.9rem;line-height:1.7;margin:0;max-width:340px}.footer-links h4.footer-title{color:#fff;font-size:1rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin:0 0 20px;padding-bottom:10px;border-bottom:1px solid var(--divider);position:relative}.footer-links h4.footer-title::after{content:'';position:absolute;left:0;bottom:-1px;width:30px;height:2px;background:var(--gold)}.footer-nav{list-style:none;margin:0;padding:0}.footer-nav li{margin-bottom:10px}.footer-nav a{color:var(--text-secondary);font-size:.9rem;transition:color .3s,padding-left .3s}.footer-nav a:hover{color:var(--gold);padding-left:5px}.footer-contact .footer-title{color:#fff;font-size:1rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin:0 0 20px;padding-bottom:10px;border-bottom:1px solid var(--divider);position:relative}.footer-contact .footer-title::after{content:'';position:absolute;left:0;bottom:-1px;width:30px;height:2px;background:var(--gold)}.footer-safe{color:var(--text-secondary);font-size:.95rem;background:rgba(255,255,255,.05);padding:10px 15px;border-radius:6px;border:1px solid var(--divider);margin-bottom:15px;margin-top:0;display:inline-block}.footer-contact .footer-copyright{margin-top:20px;color:var(--text-secondary);font-size:.85rem;padding-top:15px;border-top:1px solid var(--divider)}@media(max-width:1200px){.brand-logo{font-size:1.5rem}.header-container,.nav-container{max-width:100%;}}.site-header{top:0}@media(max-width:768px){:root{--header-offset:158px}.site-header{background-color:var(--deep-navy)}.header-top{background:linear-gradient(135deg,#0a1e3f,#113B7A);width:100%;padding:0;border-bottom:1px solid var(--divider)}.header-container{width:100%;max-width:none;margin:0;display:flex;justify-content:center;align-items:center;padding:12px 15px;gap:10px;position:relative;min-height:60px}.header-container::before{display:none}.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(--deep-navy);flex-direction:column;justify-content:flex-start;z-index:1000;transform:translateX(-100%);transition:transform .3s ease;overflow-y:auto;border-right:1px solid var(--divider);box-shadow:2px 0 20px rgba(0,0,0,.5)}.main-nav.active{display:flex;transform:translateX(0)}.nav-container{width:100%;max-width:none;margin:0;padding:0;display:flex;flex-direction:column;align-items:stretch;overflow-y:auto}.nav-menu{flex-direction:column;width:100%;margin:0;padding:70px 15px 30px;gap:0}.nav-item{width:100%;border-bottom:1px solid var(--divider)}.nav-link{padding:14px 12px;color:var(--text-main);font-size:1rem;font-weight:600;transition:background .3s,color .3s}.nav-link:hover{background:rgba(255,255,255,.05);color:var(--gold)}.mobile-nav-buttons{display:flex;flex-direction:row;flex-wrap:nowrap;justify-content:center;align-items:center;gap:8px;padding:10px 15px;background-color:#0e2a52;width:100%;border-bottom:1px solid var(--divider);min-height:48px;overflow-x:auto}.mobile-nav-buttons .btn{flex:1 1 auto;padding:9px 12px;font-size:.85rem;min-width:0}.mobile-nav-buttons .btn-register{background:var(--btn-gradient)}.mobile-nav-buttons .btn-login{background:linear-gradient(180deg,#f2c14e,#d49a2a);color:#08162B}.mobile-nav-buttons .btn-download{background:linear-gradient(180deg,#4fa8ff,#1d5fd1);color:#fff}.hamburger-menu{display:flex;position:fixed;top:19px;left:12px;z-index:1001}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);z-index:999;opacity:0;transition:opacity .3s ease}.mobile-menu-overlay.visible{display:block;opacity:1}.footer-container{padding:40px 15px 20px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-info .footer-desc{margin-left:0}.page-content img{max-width:100%!important;height:auto!important;display:block}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.logo{font-size:1.35rem}.header-container{justify-content:center;padding-left:60px;padding-right:60px}.header-container{justify-content:center;padding-left:60px;padding-right:60px}.header-top{padding:0}.main-nav.active{display:flex}.mobile-menu-overlay.visible{display:block}.hamburger-menu{display:flex}body.no-scroll{overflow:hidden}}@media(max-width:480px){.btn-register,.btn-login,.btn-download{padding:8px 10px;font-size:.8rem}.footer-copyright{font-size:.8rem}}
/* 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;
}