/* ============================================================
   A·SEEK — Always Seeking
   ============================================================ */

:root{
  --bg:        #05070d;
  --bg-alt:    #080b14;
  --bg-card:   rgba(255,255,255,.035);
  --line:      rgba(255,255,255,.09);
  --line-soft: rgba(255,255,255,.055);

  --text:      #e8ecf6;
  --text-dim:  #9aa4bd;
  --text-mute: #6b748c;

  --accent:    #4fd1c5;
  --accent-2:  #8b7cf6;
  --accent-3:  #f6c76b;

  --grad: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);

  --nav-h: 72px;
  --radius: 16px;
  --wrap: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; scroll-padding-top:var(--nav-h); }

body{
  background:var(--bg);
  color:var(--text);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Hiragino Sans","Yu Gothic UI","Meiryo",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:none; cursor:pointer; }
canvas{ display:block; }
svg{ width:100%; height:100%; }

::selection{ background:rgba(79,209,197,.28); }

.wrap{ width:100%; max-width:var(--wrap); margin:0 auto; padding:0 28px; }

/* ---------------- 导航 ---------------- */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  height:var(--nav-h);
  display:flex; align-items:center;
  transition:background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  background:rgba(5,7,13,.78);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line-soft);
}
.nav__inner{
  width:100%; max-width:var(--wrap); margin:0 auto; padding:0 28px;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
}

.brand{ display:flex; align-items:center; gap:10px; color:var(--accent); flex-shrink:0; }
.brand__mark{ width:26px; height:26px; transition:transform .6s var(--ease); }
.brand:hover .brand__mark{ transform:rotate(120deg); }
.brand__text{
  font-size:19px; font-weight:700; letter-spacing:.14em; color:var(--text);
}
.brand__text i{ font-style:normal; color:var(--accent); margin:0 1px; }

.nav__links{ display:flex; align-items:center; gap:6px; }
.nav__links > a{
  position:relative; padding:8px 14px; font-size:14.5px; color:var(--text-dim);
  border-radius:9px; transition:color .25s, background .25s;
}
.nav__links > a::after{
  content:""; position:absolute; left:14px; right:14px; bottom:3px; height:1.5px;
  background:var(--grad); transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav__links > a:hover{ color:var(--text); }
.nav__links > a:hover::after{ transform:scaleX(1); }

.lang{
  display:flex; align-items:center; gap:6px; margin-left:10px; flex-shrink:0;
  padding:7px 11px 7px 13px; font-size:13px; letter-spacing:.04em; white-space:nowrap;
  color:var(--text-dim); border:1px solid var(--line); border-radius:999px;
  transition:color .25s, border-color .25s, background .25s;
}
.lang > svg{ width:15px; height:15px; fill:currentColor; flex-shrink:0; }
.lang__caret{ width:12px !important; height:12px !important; fill:none !important; stroke:currentColor; opacity:.7; }
.lang:hover{
  color:var(--text); border-color:rgba(79,209,197,.5); background:rgba(79,209,197,.07);
}

/* ---------------- 语言选择弹窗 ---------------- */
.lang-modal{
  position:fixed; inset:0; z-index:300;
  display:flex; align-items:center; justify-content:center; padding:24px;
  opacity:0; visibility:hidden;
  transition:opacity .26s var(--ease), visibility .26s var(--ease);
}
.lang-modal.is-open{ opacity:1; visibility:visible; }
.lang-modal__backdrop{
  position:absolute; inset:0;
  background:rgba(3,5,10,.74); backdrop-filter:blur(6px);
}
.lang-modal__panel{
  position:relative; width:100%; max-width:640px; max-height:84vh; overflow-y:auto;
  padding:26px 26px 24px; border-radius:20px;
  background:linear-gradient(180deg,#0d1222 0%, #080b14 100%);
  border:1px solid var(--line);
  box-shadow:0 40px 90px -30px rgba(0,0,0,.95);
  transform:translateY(16px) scale(.985);
  transition:transform .3s var(--ease);
}
.lang-modal.is-open .lang-modal__panel{ transform:none; }
.lang-modal__head{
  display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:20px;
}
.lang-modal__title{ font-size:19px; font-weight:650; letter-spacing:.01em; }
.lang-modal__close{
  width:36px; height:36px; padding:9px; flex-shrink:0; border-radius:50%;
  color:var(--text-dim); border:1px solid var(--line);
  transition:color .25s, border-color .25s, background .25s;
}
.lang-modal__close svg{ fill:none; stroke:currentColor; }
.lang-modal__close:hover{
  color:var(--text); border-color:rgba(79,209,197,.5); background:rgba(79,209,197,.08);
}

.lang-grid{ list-style:none; display:grid; grid-template-columns:repeat(3,1fr); gap:10px; }
.lang-grid button{
  display:block; width:100%; padding:13px 14px; border-radius:12px; text-align:start;
  border:1px solid var(--line-soft); background:rgba(255,255,255,.03);
  transition:border-color .22s, background .22s, transform .22s var(--ease);
}
.lang-grid button:hover{
  border-color:rgba(79,209,197,.42); background:rgba(79,209,197,.07); transform:translateY(-2px);
}
.lang-grid button.is-active{
  border-color:rgba(79,209,197,.65); background:rgba(79,209,197,.12);
}
.lg-name{ display:block; font-size:15.5px; font-weight:600; color:var(--text); line-height:1.45; }
.lg-en{ display:block; margin-top:1px; font-size:11.5px; letter-spacing:.06em; color:var(--text-mute); }

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}
body.is-locked{ overflow:hidden; }

/* LTR 片段：域名、邮箱等在 RTL 语言下仍按从左到右显示 */
.product__url, .join-mail__link{ direction:ltr; unicode-bidi:isolate; }

/* ---------------- RTL（العربية / اردو）---------------- */
[dir="rtl"] .lang{ margin-left:0; margin-right:10px; padding:7px 13px 7px 11px; }
[dir="rtl"] .join-tips li{ padding-left:0; padding-right:16px; }
[dir="rtl"] .join-tips li::before{ left:auto; right:0; }
[dir="rtl"] .product__go{ transform:translate(4px,4px); }
[dir="rtl"] a.product:hover .product__go{ transform:translate(0,0); }

.nav__toggle{ display:none; flex-direction:column; gap:5px; width:40px; padding:8px; }
.nav__toggle span{ display:block; height:1.6px; background:var(--text); border-radius:2px; transition:transform .3s var(--ease), opacity .25s; }
.nav__toggle.is-open span:nth-child(1){ transform:translateY(6.6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2){ opacity:0; }
.nav__toggle.is-open span:nth-child(3){ transform:translateY(-6.6px) rotate(-45deg); }

/* ---------------- Hero ---------------- */
.hero{
  position:relative; min-height:100svh;
  display:flex; align-items:center; justify-content:center;
  padding:calc(var(--nav-h) + 40px) 28px 100px;
  overflow:hidden;
}
.hero__canvas{ position:absolute; inset:0; width:100%; height:100%; }
.hero__glow{
  position:absolute; top:50%; left:50%; width:min(1100px,130vw); aspect-ratio:1;
  transform:translate(-50%,-55%);
  background:radial-gradient(circle, rgba(79,209,197,.13) 0%, rgba(139,124,246,.09) 32%, transparent 65%);
  filter:blur(20px); pointer-events:none;
}
.hero__content{ position:relative; z-index:2; text-align:center; max-width:860px; }

.hero__eyebrow{
  display:inline-block; margin-bottom:28px; padding:6px 16px;
  font-size:12.5px; letter-spacing:.22em; color:var(--accent);
  border:1px solid rgba(79,209,197,.28); border-radius:999px;
  background:rgba(79,209,197,.06);
}
.hero__title{ margin-bottom:6px; line-height:1; }
.hero__word{
  display:inline-block;
  font-size:clamp(58px, 13vw, 148px); font-weight:800; letter-spacing:.02em;
  background:linear-gradient(180deg,#ffffff 0%,#c9d2e8 55%,#7c86a5 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero__word i{ font-style:normal; -webkit-text-fill-color:var(--accent); }
.hero__tagline{
  font-size:clamp(15px,2.4vw,21px); font-weight:500;
  letter-spacing:.34em; text-transform:uppercase;
  color:var(--text-dim); margin-bottom:30px;
}
.hero__desc{
  max-width:600px; margin:0 auto 42px;
  font-size:16.5px; color:var(--text-dim); line-height:1.95;
}
.hero__actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 30px; border-radius:999px; font-size:15px; font-weight:600;
  transition:transform .3s var(--ease), box-shadow .3s, background .3s, border-color .3s;
}
.btn--primary{
  background:var(--grad); color:#06080f;
  box-shadow:0 8px 30px -8px rgba(79,209,197,.5);
}
.btn--primary:hover{ transform:translateY(-2px); box-shadow:0 14px 40px -8px rgba(79,209,197,.65); }
.btn--ghost{ border:1px solid var(--line); color:var(--text); background:rgba(255,255,255,.03); }
.btn--ghost:hover{ transform:translateY(-2px); border-color:rgba(139,124,246,.55); background:rgba(139,124,246,.08); }

.hero__scroll{ position:absolute; bottom:34px; left:50%; transform:translateX(-50%); z-index:2; }
.hero__mouse{
  display:block; width:24px; height:38px; border:1.4px solid var(--line);
  border-radius:14px; position:relative;
}
.hero__mouse i{
  position:absolute; left:50%; top:8px; width:3px; height:7px; margin-left:-1.5px;
  background:var(--accent); border-radius:2px;
  animation:wheel 1.9s var(--ease) infinite;
}
@keyframes wheel{ 0%{opacity:0;transform:translateY(0)} 25%{opacity:1} 75%{opacity:0;transform:translateY(13px)} 100%{opacity:0} }

/* ---------------- 通用区块 ---------------- */
.section{ position:relative; padding:128px 0; }
.section--alt{ background:var(--bg-alt); border-block:1px solid var(--line-soft); }

.sec-head{ max-width:680px; margin-bottom:64px; }
.sec-idx{
  display:block; margin-bottom:14px; font-size:12px; font-weight:700;
  letter-spacing:.3em; color:var(--accent);
}
.sec-title{
  font-size:clamp(30px,4.6vw,46px); font-weight:700; line-height:1.25;
  letter-spacing:-.01em; margin-bottom:16px;
}
.sec-sub{ font-size:16.5px; color:var(--text-dim); }

/* ---------------- 关于 ---------------- */
.about-grid{
  display:grid; grid-template-columns:1.05fr .95fr; gap:72px; align-items:center;
}
.about-copy p{ color:var(--text-dim); margin-bottom:22px; }
.about-copy p:last-child{ margin-bottom:0; }
.about-copy .lead{
  font-size:19px; line-height:1.9; color:var(--text); font-weight:400;
}

.about-visual{ position:relative; }
.about-visual canvas{
  width:100%; height:400px; border-radius:var(--radius);
  background:radial-gradient(circle at 50% 40%, rgba(79,209,197,.07), transparent 70%);
  border:1px solid var(--line-soft);
}
.net-legend{
  margin-top:14px; text-align:center;
  font-size:12.5px; letter-spacing:.08em; color:var(--text-mute);
}
.about-badges{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:20px; }
.badge{
  padding:16px 14px; text-align:center;
  background:var(--bg-card); border:1px solid var(--line-soft); border-radius:12px;
  transition:border-color .3s, transform .3s var(--ease);
}
.badge:hover{ border-color:rgba(79,209,197,.4); transform:translateY(-3px); }
.badge strong{ display:block; font-size:14.5px; font-weight:600; color:var(--text); }
.badge span{ display:block; margin-top:3px; font-size:11.5px; letter-spacing:.06em; color:var(--text-mute); }

/* ---------------- 理念卡片 ---------------- */
.cards{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.card{
  padding:34px 26px; border-radius:var(--radius);
  background:var(--bg-card); border:1px solid var(--line-soft);
  transition:transform .4s var(--ease), border-color .4s, background .4s;
}
.card:hover{ transform:translateY(-6px); border-color:rgba(79,209,197,.32); background:rgba(79,209,197,.045); }
.card__icon{
  width:46px; height:46px; margin-bottom:22px; padding:11px;
  color:var(--accent); border-radius:12px;
  background:rgba(79,209,197,.1); border:1px solid rgba(79,209,197,.2);
}
.card__icon svg{ fill:currentColor; }
.card h3{ font-size:19px; font-weight:650; margin-bottom:10px; }
.card p{ font-size:14.8px; color:var(--text-dim); line-height:1.85; }

/* ---------------- 产品 ---------------- */
.products{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.product{
  position:relative; display:flex; flex-direction:column;
  padding:32px 28px 28px; border-radius:var(--radius);
  background:var(--bg-card); border:1px solid var(--line-soft);
  transition:transform .4s var(--ease), border-color .4s, background .4s, box-shadow .4s;
}
a.product:hover{
  transform:translateY(-6px);
  border-color:rgba(79,209,197,.38);
  background:rgba(255,255,255,.055);
  box-shadow:0 20px 50px -25px rgba(0,0,0,.9);
}
.product__top{ display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:24px; }
.product__icon{
  width:52px; height:52px; padding:13px; border-radius:14px;
  border:1px solid var(--line); background:rgba(255,255,255,.04);
}
.product__icon svg{ fill:none; }
.product__icon--chat{ color:var(--accent);   border-color:rgba(79,209,197,.28);  background:rgba(79,209,197,.09); }
.product__icon--ip  { color:var(--accent-2); border-color:rgba(139,124,246,.28); background:rgba(139,124,246,.09); }
.product__icon--soon{ color:var(--text-mute); }

.product__go{
  width:34px; height:34px; padding:8px; border-radius:50%;
  color:var(--text-mute); border:1px solid var(--line-soft);
  opacity:0; transform:translate(-4px,4px);
  transition:opacity .35s, transform .35s var(--ease), color .3s, border-color .3s;
}
a.product:hover .product__go{ opacity:1; transform:translate(0,0); color:var(--accent); border-color:rgba(79,209,197,.4); }

.product__name{ font-size:23px; font-weight:700; letter-spacing:-.01em; }
.product__url{
  margin:4px 0 16px; font-size:13px; letter-spacing:.04em;
  color:var(--text-mute); font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.product__desc{ font-size:14.8px; color:var(--text-dim); line-height:1.85; flex:1; margin-bottom:22px; }
.product__tag{
  align-self:flex-start; padding:5px 13px; border-radius:999px;
  font-size:12px; letter-spacing:.06em;
  color:var(--accent); background:rgba(79,209,197,.1); border:1px solid rgba(79,209,197,.25);
}
.product__tag--soon{ color:var(--text-mute); background:rgba(255,255,255,.04); border-color:var(--line); }
.product--more{ border-style:dashed; opacity:.85; }

/* ---------------- 加入 ---------------- */
.section--join{ padding-bottom:140px; }
.join-box{
  position:relative; max-width:780px; margin:0 auto; text-align:center;
  padding:66px 44px; border-radius:24px;
  background:linear-gradient(160deg, rgba(79,209,197,.075), rgba(139,124,246,.06) 55%, transparent);
  border:1px solid var(--line-soft);
  overflow:hidden;
}
.join-box::before{
  content:""; position:absolute; top:-60%; left:50%; transform:translateX(-50%);
  width:520px; height:520px; border-radius:50%;
  background:radial-gradient(circle, rgba(79,209,197,.14), transparent 68%);
  pointer-events:none;
}
.join-box .sec-idx{ position:relative; }
.join-title{ position:relative; font-size:clamp(28px,4vw,40px); font-weight:700; margin:10px 0 20px; }
.join-desc{ position:relative; max-width:560px; margin:0 auto 38px; color:var(--text-dim); }

.join-mail{
  position:relative; display:inline-flex; align-items:center; gap:12px;
  padding:14px 14px 14px 30px; border-radius:999px;
  background:rgba(5,7,13,.6); border:1px solid rgba(79,209,197,.3);
  transition:border-color .3s, box-shadow .3s;
}
.join-mail:hover{ border-color:rgba(79,209,197,.65); box-shadow:0 0 34px -12px rgba(79,209,197,.55); }
.join-mail__link{
  font-size:clamp(15px,2.2vw,20px); font-weight:600; letter-spacing:.02em;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.copy-btn{
  padding:9px 20px; font-size:13.5px; font-weight:600; border-radius:999px;
  color:var(--text); background:rgba(255,255,255,.07); border:1px solid var(--line);
  transition:background .25s, border-color .25s, color .25s;
}
.copy-btn:hover{ background:rgba(79,209,197,.16); border-color:rgba(79,209,197,.5); color:var(--accent); }
.copy-btn.is-done{ background:rgba(79,209,197,.2); border-color:rgba(79,209,197,.6); color:var(--accent); }

.join-tips{
  position:relative; list-style:none; margin-top:40px;
  display:flex; flex-wrap:wrap; justify-content:center; gap:12px 30px;
}
.join-tips li{ font-size:14px; color:var(--text-mute); padding-left:16px; position:relative; }
.join-tips li::before{
  content:""; position:absolute; left:0; top:10px; width:5px; height:5px;
  border-radius:50%; background:var(--accent); opacity:.75;
}

/* ---------------- 页脚 ---------------- */
.footer{ padding:72px 0 34px; background:var(--bg-alt); border-top:1px solid var(--line-soft); }
.footer__inner{
  display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px;
  padding-bottom:48px; border-bottom:1px solid var(--line-soft);
}
.footer__brand .brand__text{ font-size:17px; }
.footer__brand p{ margin-top:8px; font-size:13px; letter-spacing:.22em; color:var(--text-mute); }
.footer__links{ display:flex; flex-direction:column; gap:9px; }
.footer__links strong{ font-size:12px; letter-spacing:.2em; color:var(--text-mute); margin-bottom:4px; font-weight:600; }
.footer__links a{ font-size:14.5px; color:var(--text-dim); transition:color .25s; width:fit-content; }
.footer__links a:hover{ color:var(--accent); }
.footer__bottom{
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  padding-top:26px; font-size:13px; color:var(--text-mute);
}

/* ---------------- 动画 / 提示 ---------------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in{ opacity:1; transform:none; }

.toast{
  position:fixed; left:50%; bottom:38px; z-index:200;
  transform:translate(-50%,24px); opacity:0; pointer-events:none;
  padding:12px 26px; border-radius:999px; font-size:14px;
  background:rgba(15,19,30,.95); color:var(--text);
  border:1px solid rgba(79,209,197,.35); backdrop-filter:blur(10px);
  transition:opacity .3s, transform .3s var(--ease);
}
.toast.is-show{ opacity:1; transform:translate(-50%,0); }

/* ---------------- 响应式 ---------------- */
@media (max-width:960px){
  .about-grid{ grid-template-columns:1fr; gap:48px; }
  .cards{ grid-template-columns:repeat(2,1fr); }
  .products{ grid-template-columns:1fr; }
  .footer__inner{ grid-template-columns:1fr 1fr; }
  .footer__brand{ grid-column:1 / -1; }
}

@media (max-width:760px){
  .nav__toggle{ display:flex; }
  .nav__links{
    position:fixed; top:var(--nav-h); left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    padding:14px 20px 22px;
    background:rgba(5,7,13,.97); backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line-soft);
    transform:translateY(-14px); opacity:0; pointer-events:none;
    transition:opacity .3s, transform .3s var(--ease);
  }
  .nav__links.is-open{ transform:none; opacity:1; pointer-events:auto; }
  .nav__links > a{ padding:13px 8px; font-size:16px; }
  .nav__links > a::after{ display:none; }
  .lang{ margin:10px 8px 0; width:fit-content; }
  .lang-grid{ grid-template-columns:repeat(2,1fr); }
  .lang-modal{ padding:16px; }

  .section{ padding:92px 0; }
  .section--join{ padding-bottom:100px; }
  .join-box{ padding:48px 24px; }
  .hero{ padding-bottom:120px; }
  .about-visual canvas{ height:300px; }
  .footer__inner{ grid-template-columns:1fr; gap:32px; }
}

@media (max-width:520px){
  .cards{ grid-template-columns:1fr; }
  .hero__actions{ flex-direction:column; }
  .btn{ justify-content:center; }
  .join-mail{ flex-direction:column; gap:10px; padding:20px 24px; border-radius:20px; }
  .copy-btn{ width:100%; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
  .reveal{ opacity:1; transform:none; }
}