/* =========================================================
   安汇远域建站 ahyzyl.cn — 全站基础样式
   风格：派对潮流风 · 亮紫 + 亮蓝 + 纯白
   布局：十字渐变视觉聚焦
   作者：豆包定制
   说明：本文件为全站共享设计系统，含变量、重置、导航、页脚、
        通用组件、十字渐变聚焦背景、滚动动画与响应式基础。
        各页面独立区块样式见 css/page.css。
   ========================================================= */

/* ---------- 一、设计变量 ---------- */
:root{
  /* 主色：亮紫 */
  --purple-900:#3b0a63;
  --purple-700:#6d1fb8;
  --purple-500:#8b2ff5;
  --purple-400:#a855f7;
  --purple-300:#c084fc;
  /* 主色：亮蓝 */
  --blue-600:#0084ff;
  --blue-500:#00b4ff;
  --blue-400:#22d3ee;
  --blue-300:#7dd3fc;
  /* 中性 */
  --white:#ffffff;
  --paper:#fafaff;
  --ink-900:#0f0a1f;
  --ink-700:#241a3d;
  --ink-500:#4a3d6b;
  --ink-300:#8b80a8;
  --line:rgba(139,47,245,.14);
  --line-blue:rgba(0,180,255,.16);

  /* 渐变 */
  --grad-cross-h:linear-gradient(90deg,transparent,rgba(168,85,247,.55),rgba(0,180,255,.55),transparent);
  --grad-cross-v:linear-gradient(180deg,transparent,rgba(0,180,255,.5),rgba(168,85,247,.5),transparent);
  --grad-brand:linear-gradient(120deg,#8b2ff5 0%,#6d1fb8 38%,#0084ff 100%);
  --grad-brand-soft:linear-gradient(120deg,rgba(168,85,247,.14),rgba(0,180,255,.14));
  --grad-text:linear-gradient(100deg,#c084fc,#7dd3fc 60%,#a855f7);
  --grad-glass:linear-gradient(135deg,rgba(255,255,255,.9),rgba(255,255,255,.55));

  /* 阴影 */
  --shadow-sm:0 4px 18px rgba(35,10,70,.08);
  --shadow-md:0 14px 40px rgba(35,10,70,.14);
  --shadow-lg:0 30px 80px rgba(35,10,70,.22);
  --shadow-glow:0 0 60px rgba(168,85,247,.35);

  /* 圆角 */
  --r-sm:10px;
  --r-md:18px;
  --r-lg:28px;
  --r-xl:40px;

  /* 字体 */
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --maxw:1280px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 二、重置 ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--ink-700);
  background:var(--paper);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .3s var(--ease)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,h5{font-weight:800;line-height:1.25;color:var(--ink-900);letter-spacing:-.01em}
section{position:relative}

/* ---------- 三、十字渐变聚焦背景（全站底纹） ---------- */
/* 通过水平+垂直两条渐变光带交叉，中心汇聚为视觉焦点 */
.cross-bg{
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(60% 50% at 50% 42%,rgba(168,85,247,.10),transparent 70%),
    radial-gradient(50% 40% at 50% 42%,rgba(0,180,255,.12),transparent 72%),
    var(--paper);
}
.cross-bg::before,
.cross-bg::after{
  content:"";
  position:absolute;
  left:50%;
  top:42%;
  transform:translate(-50%,-50%);
  filter:blur(60px);
  opacity:.5;
}
.cross-bg::before{width:80vw;height:6px;background:var(--grad-cross-h)}
.cross-bg::after{width:6px;height:70vh;background:var(--grad-cross-v)}

/* 页面级十字聚焦容器（hero 等大区块） */
.cross-focus{
  position:relative;
  isolation:isolate;
}
.cross-focus::before,
.cross-focus::after{
  content:"";
  position:absolute;
  z-index:-1;
  border-radius:999px;
  filter:blur(70px);
  opacity:.55;
  animation:crossPulse 9s ease-in-out infinite;
}
.cross-focus::before{width:90%;height:8px;left:5%;top:50%;background:var(--grad-cross-h)}
.cross-focus::after{width:8px;height:80%;left:50%;top:10%;background:var(--grad-cross-v)}
@keyframes crossPulse{
  0%,100%{opacity:.4;transform:scaleY(1)}
  50%{opacity:.65;transform:scaleY(1.08)}
}

/* ---------- 四、布局工具 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}
.wrap-sm{max-width:980px;margin:0 auto;padding:0 32px}
.flex{display:flex}
.grid{display:grid;gap:28px}
.between{display:flex;justify-content:space-between;align-items:center}
.center{text-align:center}
.mt-s{margin-top:14px}.mt-m{margin-top:32px}.mt-l{margin-top:64px}
.mb-m{margin-bottom:32px}

/* ---------- 五、通用区块 ---------- */
.section{padding:96px 0;position:relative}
.section-tight{padding:64px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--purple-500);
  padding:7px 16px;border-radius:999px;
  background:var(--grad-brand-soft);
  border:1px solid var(--line);
}
.eyebrow i{width:6px;height:6px;border-radius:999px;background:var(--blue-500)}
.sec-title{
  font-size:clamp(28px,3.6vw,46px);
  margin-top:18px;
  line-height:1.2;
}
.sec-title em{
  font-style:normal;
  background:var(--grad-text);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.sec-desc{
  margin-top:18px;max-width:680px;
  color:var(--ink-500);font-size:16px;
}
.sec-head{margin-bottom:52px}
.sec-head.center .sec-desc{margin-left:auto;margin-right:auto}

/* ---------- 六、按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 30px;border-radius:999px;
  font-weight:700;font-size:15px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .3s;
  position:relative;overflow:hidden;
}
.btn svg{width:18px;height:18px}
.btn-primary{color:#fff;background:var(--grad-brand);background-size:160% 100%;box-shadow:0 12px 30px rgba(109,31,184,.32)}
.btn-primary:hover{transform:translateY(-3px);background-position:100% 0;box-shadow:0 20px 44px rgba(0,132,255,.34)}
.btn-ghost{color:var(--purple-700);background:rgba(255,255,255,.7);border:1.5px solid var(--line);backdrop-filter:blur(8px)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--purple-400);box-shadow:var(--shadow-glow)}
.btn-light{color:var(--ink-900);background:#fff;box-shadow:var(--shadow-sm)}
.btn-light:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.btn-row{display:flex;gap:16px;flex-wrap:wrap}

/* ---------- 七、顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  transition:background .4s var(--ease),box-shadow .4s var(--ease),padding .4s var(--ease);
  padding:18px 0;
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:900;font-size:20px;color:#fff}
.brand .logo-mark{
  width:42px;height:42px;border-radius:13px;
  background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-weight:900;
  box-shadow:0 6px 20px rgba(109,31,184,.4);
  flex:none;
}
.brand b{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
/* 透明态（首页 hero 上） */
.site-header.transparent{background:transparent}
.site-header.transparent .nav-link,.site-header.transparent .brand,.site-header.transparent .nav-cta{color:#fff}
.site-header.transparent .nav-link::after{background:rgba(255,255,255,.7)}
/* 滚动后实体态 */
.site-header.solid{
  background:rgba(250,250,255,.86);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 6px 30px rgba(35,10,70,.1);
  padding:12px 0;
}
.site-header.solid .brand{color:var(--ink-900)}
.site-header.solid .brand b{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.site-header.solid .nav-link{color:var(--ink-700)}
.site-header.solid .nav-cta{color:#fff;background:var(--grad-brand)}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 16px;border-radius:999px;
  font-weight:600;font-size:15px;color:var(--ink-700);
  transition:background .3s,color .3s;
}
.nav-link::after{
  content:"";position:absolute;left:16px;right:16px;bottom:6px;height:2px;
  background:var(--grad-brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.nav-item:hover .nav-link::after,.nav-item.active .nav-link::after{transform:scaleX(1)}
/* 箭头：CSS 边框雪碧，替代 ▾ 字符 */
.nav-link .caret{
  font-size:0;width:7px;height:7px;
  border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;
  display:inline-block;margin-left:4px;opacity:.55;
  transform:rotate(45deg) translate(-1px,-1px);
  transition:transform .35s var(--ease),opacity .25s;
}
.nav-item:hover .caret{transform:rotate(225deg) translate(-1px,-1px);opacity:1}
/* 二级下拉面板 */
.nav-dropdown{
  position:absolute;top:calc(100% + 12px);left:50%;
  transform:translateX(-50%) translateY(-6px) scale(.97);
  min-width:244px;padding:10px;
  background:rgba(255,255,255,.97);backdrop-filter:blur(20px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:0 16px 48px rgba(35,10,70,.14),0 2px 8px rgba(35,10,70,.06);
  opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
  display:grid;gap:2px;
}
/* 顶部三角指针 */
.nav-dropdown::before{
  content:"";position:absolute;top:-6px;left:50%;
  transform:translateX(-50%) rotate(45deg);
  width:12px;height:12px;background:rgba(255,255,255,.97);
  border-left:1px solid var(--line);border-top:1px solid var(--line);
  border-top-left-radius:3px;
}
/* 悬停桥接：填补导航与面板之间的间隙，防止鼠标移入时面板消失 */
.nav-dropdown::after{
  content:"";position:absolute;top:-12px;left:0;right:0;height:12px;
}
.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0) scale(1)}
.nav-dropdown a{
  padding:10px 14px;border-radius:10px;font-size:14px;color:var(--ink-700);
  display:flex;align-items:center;gap:10px;
  transition:background .25s,color .25s,transform .25s;
}
.nav-dropdown a:hover{background:var(--grad-brand-soft);color:var(--purple-700);transform:translateX(3px)}
.nav-dropdown a small{margin-left:auto;color:var(--ink-300);font-size:12px;font-weight:400}
.nav-cta{padding:11px 22px;border-radius:999px;font-weight:700;font-size:14px;color:#fff;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.4)}
.site-header.solid .nav-cta{border-color:transparent}
/* 汉堡 */
.nav-toggle{display:none;width:46px;height:46px;border-radius:12px;background:rgba(255,255,255,.14);color:#fff;align-items:center;justify-content:center}
.site-header.solid .nav-toggle{background:var(--grad-brand-soft);color:var(--purple-700)}
.nav-toggle svg{width:24px;height:24px}
/* 移动端菜单与遮罩：桌面默认隐藏 */
.mobile-menu{display:none}
.menu-mask{display:none}

/* ---------- 八、页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:80px;
  background:
    radial-gradient(80% 120% at 50% 0%,rgba(109,31,184,.18),transparent 60%),
    linear-gradient(180deg,#160c2b,#0f0a1f);
  color:rgba(255,255,255,.72);
  padding:80px 0 0;
}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{color:#fff;font-size:22px;font-weight:900;display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .logo-mark{background:var(--grad-brand)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:320px}
.footer-soc{display:flex;gap:12px;margin-top:22px}
.footer-soc a{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.07);color:#fff;transition:all .3s}
.footer-soc a:hover{background:var(--grad-brand);transform:translateY(-3px)}
.footer-soc svg{width:20px;height:20px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.04em}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col a:hover{color:var(--blue-300);padding-left:4px}
.footer-contact li{display:flex;gap:10px;margin-bottom:14px;font-size:14px;color:rgba(255,255,255,.7)}
.footer-contact svg{width:18px;height:18px;color:var(--blue-400);flex:none;margin-top:3px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:26px 0;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--blue-300)}
.fab-float{position:fixed;right:24px;bottom:24px;z-index:800;display:grid;gap:12px}
.fab-float a{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;color:#fff;background:var(--grad-brand);box-shadow:var(--shadow-md);transition:transform .3s}
.fab-float a:hover{transform:translateY(-4px)}
.fab-float svg{width:22px;height:22px}
.fab-top{background:rgba(15,10,31,.6)!important;backdrop-filter:blur(8px)}

/* ---------- 九、卡片 / 网格通用 ---------- */
.card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:34px;
  box-shadow:var(--shadow-sm);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--purple-300)}
.card-ico{width:60px;height:60px;border-radius:16px;display:grid;place-items:center;color:#fff;background:var(--grad-brand);margin-bottom:22px;box-shadow:0 8px 22px rgba(109,31,184,.3)}
.card-ico svg{width:30px;height:30px}
.card h3{font-size:20px;margin-bottom:12px}
.card p{color:var(--ink-500);font-size:14.5px}

/* 标签 */
.tag{display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;background:var(--grad-brand-soft);color:var(--purple-700);border:1px solid var(--line)}
.tag-blue{background:rgba(0,180,255,.12);color:var(--blue-600);border-color:var(--line-blue)}

/* ---------- 十、面包屑 ---------- */
.crumb{padding:24px 0 0}
.crumb .wrap{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-300);flex-wrap:wrap}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--purple-500)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--purple-600);font-weight:600}

/* ---------- 十一、滚动渐入动画 ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}
.reveal.d5{transition-delay:.4s}

/* 文字逐字动画 */
.split-in span{display:inline-block;opacity:0;transform:translateY(20px);animation:splitIn .6s var(--ease) forwards}
@keyframes splitIn{to{opacity:1;transform:none}}

/* ---------- 十二、响应式基础 ---------- */
@media (max-width:1080px){
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:860px){
  :root{--maxw:100%}
  .wrap{padding:0 22px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:36px}
  /* 移动导航 */
  .nav-list,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{
    display:block;
    position:fixed;inset:0 0 0 auto;width:min(86vw,420px);z-index:950;
    background:linear-gradient(180deg,#1a1033,#0f0a1f);
    color:#fff;padding:90px 28px 40px;overflow-y:auto;
    transform:translateX(100%);transition:transform .45s var(--ease);
    box-shadow:-20px 0 60px rgba(0,0,0,.4);
  }
  .mobile-menu .menu-close{
    position:absolute;top:22px;right:22px;width:42px;height:42px;
    border-radius:12px;background:rgba(255,255,255,.1);border:none;color:#fff;
    display:grid;place-items:center;cursor:pointer;transition:background .25s;
  }
  .mobile-menu .menu-close:hover{background:rgba(255,255,255,.2)}
  .mobile-menu .menu-close svg{width:22px;height:22px}
  .mobile-menu.open{transform:translateX(0)}
  .mobile-menu .m-group{border-bottom:1px solid rgba(255,255,255,.08);padding:6px 0}
  .mobile-menu .m-link{display:flex;justify-content:space-between;align-items:center;padding:15px 4px;font-weight:600;font-size:16px;color:#fff}
  .mobile-menu .m-sub{
    max-height:0;overflow:hidden;padding:0 0 0 16px;
    border-left:2px solid rgba(168,85,247,.35);margin-left:4px;
    transition:max-height .4s var(--ease),padding .4s var(--ease);
  }
  .mobile-menu .m-group.open .m-sub{max-height:400px;padding:6px 0 12px 16px}
  .mobile-menu .m-sub a{
    display:block;padding:10px 6px;color:rgba(255,255,255,.62);font-size:14.5px;
    transition:color .25s,padding-left .25s;
  }
  .mobile-menu .m-sub a:hover{color:#fff;padding-left:12px}
  .mobile-menu .m-link .caret{
    font-size:0;width:7px;height:7px;
    border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;
    transform:rotate(45deg);opacity:.55;
    transition:transform .35s var(--ease),opacity .25s;
  }
  .mobile-menu .m-group.open .caret{transform:rotate(225deg);opacity:1}
  .mobile-cta{margin-top:22px;width:100%;justify-content:center;color:#fff;background:var(--grad-brand)}
  .menu-mask{display:block;position:fixed;inset:0;background:rgba(15,10,31,.5);backdrop-filter:blur(4px);z-index:940;opacity:0;visibility:hidden;transition:opacity .4s}
  .menu-mask.show{opacity:1;visibility:visible}
  .footer-top{grid-template-columns:1fr;gap:34px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;text-align:center;gap:10px}
  .fab-float{right:16px;bottom:16px}
}
@media (max-width:560px){
  .section{padding:52px 0}
  .btn{padding:13px 22px}
  .card{padding:26px}
}