: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:#244D84;--glow:#4FA8FF;--gold:#F2C14E;--divider:#1B3357;--deep-navy:#08162B;--header-top-bg:#08162B;--nav-bg:#113B7A}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#08162B;box-shadow:0 4px 20px rgba(0,0,0,.5);min-height:auto;font-family:'Segoe UI',Roboto,Arial,sans-serif}.header-top{background:var(--header-top-bg);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:inline-block;color:var(--gold);font-size:32px;font-weight:900;letter-spacing:1px;text-decoration:none;line-height:1.2;text-transform:lowercase;text-shadow:0 0 12px rgba(242,193,78,.4)}.logo:hover{color:#f8d476;text-shadow:0 0 18px rgba(242,193,78,.7)}.desktop-nav-buttons{display:flex;align-items:center;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:6px;font-size:14px;font-weight:700;text-decoration:none;border:none;cursor:pointer;transition:all .3s ease;min-height:40px;letter-spacing:.3px}.btn-register{background:var(--btn-gradient);color:#fff;box-shadow:0 0 12px rgba(43,115,246,.4)}.btn-register:hover{transform:translateY(-2px);box-shadow:0 0 20px rgba(43,115,246,.7);color:#fff}.btn-login{background:#1D5FD1;color:#fff;border:1px solid #4FA8FF;box-shadow:0 0 8px rgba(29,95,209,.5)}.btn-login:hover{background:#2b6edb;transform:translateY(-2px);box-shadow:0 0 16px rgba(79,168,255,.6);color:#fff}.main-nav{background:var(--nav-bg);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;flex-wrap:wrap;padding:6px 16px;gap:2px}.nav-link{display:inline-block;color:var(--text-secondary);font-size:14px;font-weight:600;text-decoration:none;padding:10px 14px;border-radius:4px;transition:all .25s ease;letter-spacing:.2px;white-space:nowrap}.nav-link:hover{color:#fff;background:rgba(79,168,255,.15);text-shadow:0 0 8px rgba(79,168,255,.4)}.nav-link.active{color:var(--gold);background:rgba(242,193,78,.08);text-shadow:0 0 8px rgba(242,193,78,.5)}.mobile-nav-buttons{display:none}.hamburger-menu{display:none}.mobile-menu-overlay{display:none}body{padding-top:var(--header-offset)}.site-footer{background:var(--deep-navy);color:var(--text-secondary);font-family:'Segoe UI',Roboto,Arial,sans-serif;border-top:2px solid var(--primary)}.footer-container{max-width:1200px;margin:0 auto;padding:60px 24px 30px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}.footer-column{min-width:0}.footer-brand .footer-logo{font-size:36px;font-weight:900;color:var(--gold);text-decoration:none;display:inline-block;margin-bottom:16px;text-shadow:0 0 15px rgba(242,193,78,.3)}.footer-brand .footer-logo:hover{color:#f8d476}.footer-description{font-size:14px;line-height:1.7;color:var(--text-secondary);margin-bottom:24px;max-width:340px}.footer-copyright{font-size:13px;color:#7f95b8;border-top:1px solid var(--divider);padding-top:16px;margin-top:8px}.footer-title{color:var(--text-main);font-size:18px;font-weight:700;margin-bottom:20px;position:relative;padding-bottom:10px}.footer-title::after{content:'';position:absolute;bottom:0;left:0;width:36px;height:2px;background:var(--gold);border-radius:2px}.footer-nav{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.footer-nav a{color:var(--text-secondary);text-decoration:none;font-size:14px;transition:color .25s;padding-left:12px;position:relative}.footer-nav a::before{content:'›';position:absolute;left:0;color:var(--gold);font-weight:700}.footer-nav a:hover{color:var(--gold)}.footer-bottom{grid-column:1/-1;text-align:center;margin-top:32px;padding-top:20px;border-top:1px solid var(--divider);color:#7f95b8;font-size:13px}@media(max-width:768px){:root{--header-offset:156px}.header-container{width:100%;max-width:none;padding:12px 16px;position:relative;display:flex;justify-content:center;align-items:center}.header-top{background:var(--header-top-bg)}.logo{font-size:26px}.desktop-nav-buttons{display:none}.main-nav{display:none;flex-direction:column;position:fixed;top:0;left:0;width:280px;height:100vh;max-width:85%;height:100dvh;background:var(--deep-navy);z-index:1100;overflow-y:auto;transform:translateX(-100%);transition:transform .35s ease;border-radius:0 12px 12px 0;box-shadow:4px 0 24px rgba(0,0,0,.5)}.main-nav .nav-container{flex-direction:column;align-items:flex-start;width:100%;max-width:none;padding:20px 16px}.nav-container .nav-link{display:block;width:100%;padding:14px 12px;font-size:16px;border-bottom:1px solid var(--divider);color:var(--text-secondary)}.nav-link.active{color:var(--gold)}.nav-link:hover{background:rgba(79,168,255,.1);color:#fff}.mobile-nav-buttons{display:flex;width:100%;max-width:none;justify-content:center;align-items:center;gap:10px;padding:10px 16px;background:var(--deep-navy);border-bottom:1px solid var(--divider);flex-wrap:wrap}.mobile-nav-buttons .btn{padding:8px 20px;font-size:13px;min-height:36px;color:#fff}.hamburger-menu{display:flex;flex-direction:column;justify-content:center;align-items:center;cursor:pointer;width:40px;height:36px;position:absolute;left:12px;top:50%;transform:translateY(-50%);z-index:1102;background:transparent;border:none;padding:0}.hamburger-menu span{display:block;width:24px;height:2.5px;background:var(--text-main);margin:2.5px 0;border-radius:4px;transition:all .3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}.hamburger-menu.active span{background:var(--gold)}.mobile-menu-overlay{display:none}.mobile-menu-overlay.active{display:block;position:fixed;top:0;left:0;width:100%;height:100vh;height:100dvh;background:rgba(4,12,28,.7);z-index:1050;backdrop-filter:blur(2px)}.main-nav.active{display:flex;transform:translateX(0)}body.no-scroll{overflow:hidden}.site-footer{padding-top:0}.footer-container{width:100%;max-width:none;padding:40px 20px 24px;grid-template-columns:1fr;gap:28px}.footer-brand .footer-logo{font-size:30px}.footer-title{margin-bottom:14px}.page-content{overflow-x:hidden;max-width:100%}.page-content img{max-width:100%!important;height:auto!important;display:block}body{overflow-x:hidden}.mobile-nav-buttons .btn-register{order:1}.mobile-nav-buttons .btn-login{order:2}}
/* 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;
}