/* ============================================================
   AEGISX — GLOBAL STYLESHEET
   全局基础 + 公共头尾（浅色商务蓝调）
   所有页面统一引用：<link rel="stylesheet" href="css/global.css">
   ============================================================ */

/* ============ CSS VARIABLES ============ */
:root{
  --ink:#0b1f3a;
  --ink-2:#0f2a4d;
  --blue:#1f6feb;
  --blue-2:#3b82f6;
  --blue-soft:#e8f1ff;
  --cyan:#0aa6c2;
  --orange:#e8851f;
  --text-1:#11243f;
  --text-2:#5a6b82;
  --text-3:#8a98ad;
  --line:#e4e9f0;
  --line-2:#eef2f7;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --bg-soft-2:#eef3f9;
  --bg-glass:rgba(255,255,255,.86);
  --primary:#1f6feb;
  --primary-light:#e8f1ff;
  --secondary:#0aa6c2;
  --text-primary:#11243f;
  --text-secondary:#5a6b82;
  --text-muted:#8a98ad;
  --border-color:#e4e9f0;
  --shadow-sm:0 1px 3px rgba(16,36,63,.06),0 1px 2px rgba(16,36,63,.04);
  --shadow:0 10px 30px rgba(16,36,63,.08);
  --shadow-lg:0 20px 50px rgba(16,36,63,.12);
  --shadow-md:0 8px 24px rgba(16,36,63,.10);
  --shadow-xl:0 24px 60px rgba(16,36,63,.16);
  --r:14px;
  --max:1200px;
  --header-height:66px;
  --font:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;
  --space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;
  --container-wide:1200px;--container-max:1200px;--container-narrow:820px;
  --radius-md:10px;--radius-lg:14px;--radius-full:50px;
  --font-size-xs:12px;--font-size-sm:13px;--font-size-base:14px;--font-size-lg:15px;
  --font-size-xl:18px;--font-size-2xl:20px;--font-size-3xl:24px;--font-size-4xl:30px;--font-size-5xl:38px;
  --font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:800;
  --line-height-tight:1.25;--line-height-relaxed:1.7;
  --transition-base:.25s;--transition-fast:.18s;
  --z-header:1000;--bg-overlay:rgba(11,31,58,.45);--bg-secondary:#fff;--bg-tertiary:#f1f5fa;
  --text-inverse:#fff;
}

/* ============ RESET & BASE ============ */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text-1);line-height:1.65;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
ul,ol{list-style:none}
button{font-family:inherit}
h1,h2,h3,h4,h5,h6{color:var(--text-primary)}

/* ============ 通用按钮（全站） ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;border:none;font-family:var(--font);font-weight:600;font-size:14px;border-radius:10px;transition:.25s;white-space:nowrap;text-decoration:none}
.btn--primary{background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;box-shadow:0 8px 20px rgba(31,111,235,.3)}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(31,111,235,.4)}
.btn--outline{background:#fff;color:var(--ink);border:1.5px solid var(--line);padding:9px 18px}
.btn--outline:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}
.btn--sm{padding:7px 14px;font-size:13px}
.btn--lg{padding:13px 28px;font-size:15px;border-radius:12px}
.btn--block{display:flex;width:100%}

/* ============ HEADER — 浅色商务蓝调 ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:66px;
  background:rgba(255,255,255,.86);backdrop-filter:blur(18px) saturate(180%);
  -webkit-backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid #e4e9f0;transition:all .25s
}
.header--scrolled{box-shadow:var(--shadow-md);background:rgba(255,255,255,.96)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--container-wide);margin:0 auto;padding:0 var(--space-6)}

/* Logo */
.header__logo{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:800;color:var(--ink);text-decoration:none}
.header__logo:hover{opacity:.9}
.header__logo .logo-box{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;font-weight:800;font-size:18px;box-shadow:0 6px 16px rgba(31,111,235,.32)}
.header__logo .logo-text{background:linear-gradient(135deg,var(--blue),var(--blue-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:800}
.header__logo .logo-sub{font-size:11px;color:var(--text-3);letter-spacing:2px;font-weight:600;text-transform:uppercase}

/* 主导航 */
.header__nav{display:flex;align-items:center;gap:4px}
.header__nav-link{display:flex;align-items:center;gap:6px;padding:8px 14px;font-size:14px;font-weight:500;color:var(--text-2);border-radius:var(--radius-md);transition:all var(--transition-fast);text-decoration:none;white-space:nowrap;position:relative}
.header__nav-link:hover,.header__nav-link--active{color:var(--blue);background:var(--blue-soft)}
.header__nav-link--active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:18px;height:2px;background:var(--blue);border-radius:1px}

/* 下拉 */
.header__dropdown{position:relative}
.header__dropdown-menu{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);min-width:210px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);padding:8px;opacity:0;visibility:hidden;transition:all var(--transition-base)}
.header__dropdown:hover .header__dropdown-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.header__dropdown-item{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:13.5px;color:var(--text-2);border-radius:var(--radius-md);transition:all var(--transition-fast);text-decoration:none}
.header__dropdown-item:hover{background:var(--blue-soft);color:var(--blue)}
.header__dropdown-item .dropdown-icon{font-size:16px;flex-shrink:0}
.header__dropdown-item--all{border-top:1px solid var(--line);margin-top:4px;padding-top:12px;color:var(--blue)!important;font-weight:600}

/* 右侧操作 */
.header__actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.header__cta-group{display:flex;align-items:center;gap:8px}

/* 汉堡 */
.header__menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:var(--radius-md);color:var(--ink);cursor:pointer;flex-shrink:0;background:transparent;border:1px solid var(--line)}
.header__menu-toggle span{display:block;width:22px;height:2px;background:currentColor;border-radius:2px;position:relative;transition:all var(--transition-base)}
.header__menu-toggle span::before,.header__menu-toggle span::after{content:'';position:absolute;left:0;width:100%;height:2px;background:currentColor;border-radius:2px;transition:all var(--transition-base)}
.header__menu-toggle span::before{top:-7px}
.header__menu-toggle span::after{top:7px}
.header__menu-toggle--active span{background:transparent}
.header__menu-toggle--active span::before{top:0;transform:rotate(45deg)}
.header__menu-toggle--active span::after{top:0;transform:rotate(-45deg)}

/* 移动端面板 */
.header__mobile-overlay{display:none;position:fixed;inset:0;background:var(--bg-overlay);z-index:calc(var(--z-header) - 1);opacity:0;transition:opacity var(--transition-base)}
.header__mobile-overlay--visible{opacity:1}
.header__mobile-nav{display:none;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:#fff;z-index:calc(var(--z-header) - 1);padding:var(--space-6);overflow-y:auto;transform:translateX(100%);transition:transform var(--transition-base)}
.header__mobile-nav--open{transform:translateX(0)}
.header__mobile-nav-link{display:flex;align-items:center;justify-content:space-between;padding:14px;font-size:16px;font-weight:500;color:var(--text-primary);border-bottom:1px solid var(--line);text-decoration:none}
.header__mobile-nav-link:hover{color:var(--blue)}
.header__mobile-sub{padding-left:16px}
.header__mobile-sub .header__mobile-nav-link{font-size:14px;font-weight:400;color:var(--text-secondary)}

/* ============ FOOTER — 浅色商务蓝调 ============ */
.footer{background:#0b1f3a;color:#c5d3e6;padding:48px 0 24px;margin-top:0}
.footer__inner{max-width:var(--container-wide);margin:0 auto;padding:0 var(--space-6)}
.footer__top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:var(--space-8);padding-bottom:var(--space-12);border-bottom:1px solid rgba(255,255,255,.1)}
.footer__brand{max-width:300px}
.footer__brand-logo{display:flex;align-items:center;gap:11px;margin-bottom:var(--space-4);font-size:18px;font-weight:800;color:#fff}
.footer__brand-logo .logo-box{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;font-weight:800;font-size:18px}
.footer__brand-desc{font-size:13px;color:#9fb0c6;line-height:1.7;margin-bottom:var(--space-4)}
.footer__social{display:flex;gap:10px;margin-top:var(--space-4)}
.footer__social-link{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-full);background:rgba(255,255,255,.08);color:#c5d3e6;transition:all var(--transition-fast);text-decoration:none;font-size:15px}
.footer__social-link:hover{background:var(--blue);color:#fff;transform:translateY(-2px)}
.footer__column-title{font-size:13px;font-weight:700;color:#fff;margin-bottom:var(--space-4);letter-spacing:.05em;text-transform:uppercase}
.footer__links{display:flex;flex-direction:column;gap:11px}
.footer__link{font-size:13px;color:#9fb0c6;transition:color var(--transition-fast);text-decoration:none}
.footer__link:hover{color:#6db4ff}
.footer__contact-item{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:#9fb0c6;margin-bottom:8px}
.footer__contact-item .contact-icon{flex-shrink:0;margin-top:2px}
.footer__bottom{padding:var(--space-6) 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-4);border-top:1px solid rgba(255,255,255,.1);margin-top:var(--space-8)}
.footer__copyright{font-size:12px;color:#7e8ca3}
.footer__bottom-links{display:flex;gap:var(--space-6)}
.footer__bottom-link{font-size:12px;color:#7e8ca3;text-decoration:none;transition:color var(--transition-fast)}
.footer__bottom-link:hover{color:#9fb0c6}
.footer__icp{font-size:12px;color:#7e8ca3;display:flex;align-items:center;gap:4px}
.footer__icp img{height:16px;width:auto}

/* ============ 回到顶部 ============ */
.back-to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;border:none;font-size:20px;cursor:pointer;z-index:900;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;box-shadow:0 8px 20px rgba(31,111,235,.35)}
.back-to-top--visible{opacity:1;visibility:visible;transform:none}

/* 主体留出 header 高度 */
.page-body{padding-top:80px}
main{padding-top:120px!important}

/* ============ 响应式 ============ */
@media screen and (max-width:1024px){
  .header__nav{display:none}
  .header__menu-toggle{display:flex}
  .header__mobile-nav{display:block}
  .header__mobile-overlay{display:block}
  .footer__top{grid-template-columns:1fr 1fr 1fr;gap:var(--space-6)}
  .footer__brand{grid-column:1/-1;max-width:none}
}
@media screen and (max-width:768px){
  .header__inner{padding:0 var(--space-4)}
  .header__logo{font-size:16px}
  .footer{padding:36px 0 20px}
  .footer__top{grid-template-columns:1fr 1fr;gap:var(--space-6);padding-bottom:var(--space-8)}
  .footer__brand{grid-column:1/-1}
  .footer__bottom{flex-direction:column;text-align:center}
}
@media screen and (max-width:480px){
  .footer__top{grid-template-columns:1fr;gap:var(--space-6)}
  .footer__bottom-links{flex-direction:column;gap:8px;align-items:center}
}