:root{--header-offset:122px;--top-bar-bg:#1b3c74;--nav-bg:#26A9E0;--btn-register:linear-gradient(135deg,#f7971e,#ffd200);--btn-login:#EA7C07}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,0.15);font-family:Arial,Helvetica,sans-serif}.header-top{background:var(--top-bar-bg);width:100%}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 25px;min-height:48px}.logo{font-size:28px;font-weight:bold;color:#ffffff;text-decoration:none;letter-spacing:1px;font-style:italic;text-shadow:1px 1px 3px rgba(0,0,0,0.2)}.logo span{color:#ffd200}.desktop-nav-buttons{display:flex;gap:10px;align-items:center}.btn{display:inline-block;padding:8px 22px;border-radius:6px;font-weight:bold;text-decoration:none;font-size:16px;transition:all 0.3s ease;border:none;cursor:pointer;text-align:center}.btn-dangky{background:var(--btn-register);color:#7a4d00;box-shadow:0 2px 6px rgba(0,0,0,0.2)}.btn-dangky:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(247,151,30,0.4)}.btn-dangnhap{background:var(--btn-login);color:#ffffff;box-shadow:0 2px 6px rgba(0,0,0,0.2)}.btn-dangnhap:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(234,124,7,0.4)}.main-nav{background:var(--nav-bg);width:100%;display:flex;align-items:center;justify-content:center;min-height:52px;border-top:1px solid rgba(255,255,255,0.2)}.nav-container{max-width:1200px;width:100%;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;gap:5px;padding:8px 20px;flex-wrap:wrap}.nav-container a{color:#ffffff;text-decoration:none;font-size:16px;font-weight:bold;padding:8px 16px;border-radius:4px;transition:background 0.3s,color 0.3s;white-space:nowrap;text-transform:none}.nav-container a:hover{background:rgba(0,0,0,0.1);color:#fff}.nav-container a.active{background:rgba(0,0,0,0.15);color:#fff;box-shadow:inset 0 2px 4px rgba(0,0,0,0.2)}body{padding-top:var(--header-offset);margin:0;background:#ffffff}.mobile-nav-buttons{display:none}.hamburger-menu{display:none}.mobile-menu-overlay{display:none}.site-footer{background:#1a2639;color:#aab8c5;font-family:Arial,Helvetica,sans-serif;width:100%;margin-top:60px}.footer-container{max-width:1200px;margin:0 auto;padding:50px 20px 0}.footer-content{display:flex;flex-wrap:wrap;gap:40px;padding-bottom:20px}.footer-brand{flex:1;min-width:220px}.footer-logo{font-size:24px;font-weight:bold;color:#ffffff;text-decoration:none;font-style:italic}.footer-brand p{line-height:1.6;margin-top:15px;color:#8a97a3}.footer-links,.footer-contact{flex:1;min-width:160px}.footer-links h3,.footer-contact h3{color:#ffffff;font-size:18px;margin-bottom:15px;position:relative;padding-bottom:8px}.footer-links h3:after,.footer-contact h3:after{content:'';position:absolute;bottom:0;left:0;width:50px;height:2px;background:#26A9E0}.footer-links ul{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:10px}.footer-links a{color:#aab8c5;text-decoration:none;transition:color 0.3s}.footer-links a:hover{color:#26A9E0;padding-left:5px;transition:all 0.3s}.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:20px 0;display:flex;justify-content:center;align-items:center;margin-top:30px}.footer-bottom p{color:#8a97a3;font-size:14px;text-align:center}.footer-contact p{line-height:1.6;color:#8a97a3;font-size:14px}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;justify-content:space-between;position:relative}.logo{font-size:22px;position:absolute;left:50%;transform:translateX(-50%)}.desktop-nav-buttons{display:none}.mobile-nav-buttons{display:flex;justify-content:center;align-items:center;gap:12px;padding:10px 15px;background:var(--top-bar-bg);border-top:1px solid rgba(255,255,255,0.1);flex-wrap:wrap;z-index:999}.mobile-nav-buttons .btn{padding:8px 24px;font-size:15px}.main-nav{display:none;flex-direction:column;position:fixed;top:0;left:0;width:80%;max-width:340px;height:100vh;background:#ffffff;z-index:1002;transform:translateX(-100%);transition:transform 0.3s ease;overflow-y:auto;padding-top:20px;border-radius:0;align-items:flex-start}.main-nav.active{display:block;transform:translateX(0)}.main-nav.active a{color:#333333;padding:12px 25px;border-bottom:1px solid #f0f0f0}.nav-container{width:100%;max-width:none;flex-direction:column;justify-content:flex-start;align-items:stretch;padding:5px 0}.nav-container a{color:#333333;font-size:15px;padding:12px 25px;border-bottom:1px solid #f0f0f0}.nav-container a.active{background:#e8f4fd;color:#26A9E0;box-shadow:none}.hamburger-menu{display:inline-flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:5px;background:transparent;border:none;cursor:pointer;padding:5px;z-index:1003;width:38px;height:38px;margin-left:10px}.hamburger-menu span{display:block;width:24px;height:3px;background:#ffffff;border-radius:2px;transition:all 0.3s ease}.hamburger-menu.active span:nth-child(1){transform:rotate(45deg) translate(5px,6px);background:#fff}.hamburger-menu.active span:nth-child(2){opacity:0;background:#fff}.hamburger-menu.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-4px);background:#fff}.mobile-menu-overlay{display:block;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:1001;opacity:0;visibility:hidden;transition:opacity 0.3s ease,visibility 0.3s}.mobile-menu-overlay.active{opacity:1;visibility:visible}.page-content img{max-width:100%!important;height:auto!important;display:block}.page-content{overflow-x:hidden;max-width:100%}.body{overflow-x:hidden}.footer-content{flex-direction:column;gap:20px}.footer-brand,.footer-links,.footer-contact{width:100%;text-align:left}.footer-container{padding:40px 15px 0}}
/* 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;
}