:root { --header-offset: 166px; --color-primary: #E53935; --color-secondary: #FF5A4F; --color-bg: #F5F7FA; --color-card: #FFFFFF; --color-text: #333333; --color-border: #E0E0E0; --gradient-btn: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); } body { margin: 0; padding-top: var(--header-offset); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; background-color: var(--color-bg); color: var(--color-text); } *, *::before, *::after { box-sizing: border-box; } img { max-width: 100%; height: auto; } a { text-decoration: none; } .site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #FFFFFF; box-shadow: 0 2px 12px rgba(0,0,0,0.15); min-height: auto; } .header-top { background-color: #FFFFFF; width: 100%; } .header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 24px; padding-right: 24px; min-height: 68px; width: 100%; } .logo { display: inline-block; font-size: 30px; font-weight: 900; color: var(--color-primary); letter-spacing: 1px; text-transform: uppercase; line-height: 1.2; padding: 8px 0; text-decoration: none; } .logo:hover { color: var(--color-secondary); } .hamburger-menu { display: none; width: 44px; height: 44px; background: transparent; border: none; cursor: pointer; padding: 8px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; outline: none; } .hamburger-line { display: block; width: 24px; height: 2px; background-color: var(--color-primary); transition: transform 0.3s ease, opacity 0.3s ease; border-radius: 2px; } .hamburger-menu.active .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); } .hamburger-menu.active .hamburger-line:nth-child(2) { opacity: 0; } .hamburger-menu.active .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); } .desktop-nav-buttons { display: flex; align-items: center; gap: 10px; } .btn { display: inline-block; padding: 8px 18px; border-radius: 6px; font-size: 14px; font-weight: 600; text-decoration: none; transition: all 0.3s ease; line-height: 1.4; border: none; cursor: pointer; white-space: nowrap; } .btn:hover { opacity: 0.85; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(229,57,53,0.3); } .btn-register { background-image: var(--gradient-btn); color: #FFFFFF; box-shadow: 0 4px 12px rgba(229,57,53,0.2); } .btn-login { background-color: #FFFFFF; color: var(--color-primary); border: 2px solid var(--color-primary); } .btn-download { background-color: var(--color-primary); color: #FFFFFF; } .main-nav { background-color: #F5F7FA; width: 100%; display: flex; border-top: 1px solid var(--color-border); min-height: 52px; position: static; transform: none; transition: none; } .nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 6px 20px; gap: 4px; width: 100%; flex-wrap: wrap; } .nav-link { color: var(--color-text); font-size: 15px; font-weight: 600; padding: 10px 16px; border-radius: 4px; transition: background-color 0.2s ease, color 0.2s ease; display: inline-block; text-decoration: none; line-height: 1.4; } .nav-link:hover, .nav-link.active { background-color: var(--color-primary); color: #FFFFFF; } .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: 998; opacity: 0; transition: opacity 0.3s ease; cursor: pointer; } .mobile-menu-overlay.active { opacity: 1; } .mobile-nav-buttons { display: none; flex-direction: row; justify-content: center; align-items: center; gap: 8px; padding: 10px 12px; background-color: #FFFFFF; border-top: 1px solid var(--color-border); width: 100%; min-height: 48px; } .mobile-nav-buttons .btn { flex-shrink: 0; padding: 8px 14px; font-size: 13px; } .site-footer { background-color: #263238; color: #ECEFF1; padding: 50px 0 20px; font-size: 15px; } .footer-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; } .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 30px; margin-bottom: 30px; } .footer-brand { display: flex; flex-direction: column; gap: 12px; } .footer-logo { font-size: 26px; font-weight: 900; color: #FFFFFF; text-decoration: none; letter-spacing: 1px; } .footer-logo:hover { color: var(--color-secondary); } .footer-description { line-height: 1.6; color: #B0BEC5; } .footer-heading { font-size: 16px; font-weight: 700; color: #FFFFFF; margin-bottom: 14px; text-transform: uppercase; } .footer-nav { display: flex; flex-direction: column; gap: 10px; } .footer-nav a { color: #B0BEC5; text-decoration: none; transition: color 0.3s ease; } .footer-nav a:hover { color: var(--color-secondary); } .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #37474F; } .footer-bottom p { color: #90A4AE; font-size: 14px; margin: 0; } body.no-scroll { overflow: hidden; } @media (max-width: 768px) { :root { --header-offset: 146px; } body { padding-top: var(--header-offset); } .header-container { width: 100%; max-width: none; min-height: 60px; padding-left: 12px; padding-right: 12px; display: flex; flex-direction: row; align-items: center; } .hamburger-menu { display: flex; order: 1; } .logo { order: 2; margin: 0 auto; font-size: 22px; padding: 6px 0; } .desktop-nav-buttons { display: none; } .main-nav { display: none; position: fixed; top: 0; left: 0; width: 78%; max-width: 350px; height: 100vh; background-color: #FFFFFF; z-index: 1001; transform: translateX(-100%); transition: transform 0.3s ease, display 0s linear 0.3s; overflow-y: auto; -webkit-overflow-scrolling: touch; border-top: none; box-shadow: 2px 0 12px rgba(0,0,0,0.2); } .main-nav.active { display: block; flex-direction: column; transform: translateX(0); transition: transform 0.3s ease; } .nav-container { max-width: none; width: 100%; padding: 20px 16px; flex-direction: column; align-items: flex-start; gap: 6px; min-height: 100%; } .nav-link { width: 100%; text-align: left; padding: 12px 14px; font-size: 15px; border-bottom: 1px solid #EDEDED; border-radius: 0; } .nav-link:hover, .nav-link.active { background-color: #F5F7FA; color: var(--color-primary); } .mobile-menu-overlay { display: block; } .mobile-menu-overlay.active { pointer-events: auto; } .mobile-nav-buttons { display: flex; } .mobile-nav-buttons .btn { flex: 1; } .site-footer { padding: 40px 0 15px; } .footer-container { width: 100%; max-width: none; padding: 0 16px; } .footer-grid { grid-template-columns: 1fr; gap: 20px; } .footer-grid > .footer-brand { text-align: center; align-items: center; } .footer-nav { align-items: center; } .footer-column { text-align: center; } .footer-heading { font-size: 15px; } .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;
}