/* ============================================================
   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 — AegisX 暗色科技风（午夜蓝紫 + 霓虹青） ============ */
:root{
  /* === 主文字：银白 === */
  --ink:#F8FAFC;
  --ink-2:#E2E8F0;

  /* === 主色：雾光靛蓝紫（现代高端科技感） === */
  --blue:#6366F1;
  --blue-2:#818CF8;
  --blue-soft:rgba(99,102,241,0.18);

  /* === 辅助：霓虹青/琥珀 === */
  --cyan:#06B6D4;
  --orange:#F59E0B;

  /* === 文字三层 === */
  --text-1:#F8FAFC;
  --text-2:#CBD5E1;
  --text-3:#94A3B8;

  /* === 边框：深色半透明 === */
  --line:rgba(148,163,184,0.14);
  --line-2:rgba(148,163,184,0.08);

  /* === 背景：极深蓝黑 === */
  --bg:#0A0E1A;
  --bg-soft:#0F172A;
  --bg-soft-2:#1E293B;
  --bg-glass:rgba(15,23,42,0.65);

  /* === 主色别名 === */
  --primary:#6366F1;
  --primary-light:rgba(99,102,241,0.18);
  --secondary:#06B6D4;

  /* === 文本别名 === */
  --text-primary:#F8FAFC;
  --text-secondary:#CBD5E1;
  --text-muted:#94A3B8;
  --text-inverse:#0A0E1A;

  /* === 边框别名 === */
  --border-color:rgba(148,163,184,0.14);

  /* === 阴影：深色 + 霓虹辉光 === */
  --shadow-sm:0 1px 3px rgba(0,0,0,.4);
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-lg:0 20px 50px rgba(0,0,0,.55);
  --shadow-md:0 8px 24px rgba(0,0,0,.5);
  --shadow-xl:0 24px 60px rgba(0,0,0,.65);
  --shadow-glow:0 0 32px rgba(99,102,241,.25);

  /* === 渐变 === */
  --grad-primary:linear-gradient(135deg,#6366F1 0%,#818CF8 50%,#06B6D4 100%);
  --grad-accent:linear-gradient(135deg,#A855F7 0%,#6366F1 50%,#06B6D4 100%);
  --grad-glass:linear-gradient(135deg,rgba(99,102,241,.08) 0%,rgba(6,182,212,.05) 100%);

  /* === 布局（保留） === */
  --r:14px;
  --max:1440px;
  --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:1440px;--container-max:1440px;--container-narrow:1024px;
  --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(2,6,23,.78);
  --bg-secondary:#0F172A;
  --bg-tertiary:#1E293B;
}

/* ============ 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:var(--grad-primary);color:#fff;box-shadow:0 8px 24px rgba(99,102,241,.45),0 0 0 1px rgba(255,255,255,.08) inset}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 14px 32px rgba(99,102,241,.6),0 0 24px rgba(99,102,241,.35)}
.btn--outline{background:rgba(15,23,42,.6);color:var(--ink);border:1.5px solid var(--line);padding:9px 18px;backdrop-filter:blur(12px)}
.btn--outline:hover{border-color:var(--blue);color:var(--blue-2);background:rgba(99,102,241,.12)}
.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 — 暗色玻璃（午夜蓝紫） ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:66px;
  background:rgba(10,14,26,.72);backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--line);transition:all .25s
}
.header--scrolled{box-shadow:0 8px 32px rgba(0,0,0,.5),0 0 0 1px rgba(99,102,241,.12) inset;background:rgba(10,14,26,.92)}
.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:var(--grad-primary);color:#fff;font-weight:800;font-size:18px;box-shadow:0 6px 18px rgba(99,102,241,.45),inset 0 1px 0 rgba(255,255,255,.18)}
.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:rgba(15,23,42,.92);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:0 20px 48px rgba(0,0,0,.6),0 0 0 1px rgba(99,102,241,.15) inset;backdrop-filter:blur(16px);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:rgba(10,14,26,.96);backdrop-filter:blur(20px);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 — 暗色高级（与新调色板一致） ============ */
.footer{background:linear-gradient(180deg,#070B14 0%,#0A0E1A 60%,#070B14 100%);color:var(--text-2);padding:64px 0 28px;margin-top:0;position:relative;overflow:hidden;border-top:1px solid rgba(99,102,241,.18)}
.footer::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 800px 400px at 50% 0%,rgba(99,102,241,.12),transparent 70%);pointer-events:none}
.footer__inner{max-width:var(--container-wide);margin:0 auto;padding:0 var(--space-6);position:relative}
.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 var(--line)}
.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:var(--ink)}
.footer__brand-logo .logo-box{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:var(--grad-primary);color:#fff;font-weight:800;font-size:18px;box-shadow:0 6px 18px rgba(99,102,241,.45),inset 0 1px 0 rgba(255,255,255,.18)}
.footer__brand-desc{font-size:13px;color:var(--text-3);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(148,163,184,.08);color:var(--text-2);transition:all var(--transition-fast);text-decoration:none;font-size:15px;border:1px solid var(--line)}
.footer__social-link:hover{background:var(--grad-primary);color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px rgba(99,102,241,.4);border-color:transparent}
.footer__column-title{font-size:13px;font-weight:700;color:var(--ink);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:var(--text-3);transition:color var(--transition-fast);text-decoration:none}
.footer__link:hover{color:var(--blue-2)}
.footer__contact-item{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--text-3);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 var(--line);margin-top:var(--space-8)}
.footer__copyright{font-size:12px;color:var(--text-3)}
.footer__bottom-links{display:flex;gap:var(--space-6)}
.footer__bottom-link{font-size:12px;color:var(--text-3);text-decoration:none;transition:color var(--transition-fast)}
.footer__bottom-link:hover{color:var(--text-1)}
.footer__icp{font-size:12px;color:var(--text-3);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:var(--grad-primary);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 24px rgba(99,102,241,.45),inset 0 1px 0 rgba(255,255,255,.2)}
.back-to-top--visible{opacity:1;visibility:visible;transform:none}
.back-to-top:hover{box-shadow:0 12px 32px rgba(99,102,241,.6),0 0 24px rgba(99,102,241,.3);transform:translateY(-2px)}

/* 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}
}