/* ============================================================
   CHAT STYLE — 设计令牌
   配色 "加密暮色"：午夜底色 + 电光紫→珊瑚渐变
   ============================================================ */
:root{
  --ink:#0E0B1C;        /* 深底色 / 暗色区块 */
  --ink-2:#181433;      /* 暗色卡片 */
  --ink-3:#241E48;      /* 暗色描边 */
  --cloud:#F4F2FC;      /* 浅色背景（淡薰衣草白） */
  --paper:#FFFFFF;      /* 浅色卡片 */
  --line:rgba(14,11,28,.08);
  --muted:#6B6685;      /* 浅底说明文字 */
  --muted-d:#A9A3CE;    /* 暗底说明文字 */
  --violet:#6C5CE7;     /* 主品牌色 */
  --violet-2:#8B7BFF;
  --coral:#FF6F91;      /* 副品牌色（"有型"的活力） */
  --coral-2:#FF8FA8;
  --mint:#3FD8B6;       /* 加密 / 在线状态 */
  --grad:linear-gradient(135deg,#6C5CE7 0%,#FF6F91 100%);
  --grad-soft:linear-gradient(135deg,rgba(108,92,231,.16),rgba(255,111,145,.16));
  --radius:22px;
  --radius-s:14px;
  --shadow:0 24px 60px -28px rgba(14,11,28,.45);
  --shadow-violet:0 24px 60px -22px rgba(108,92,231,.55);
  --maxw:1160px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  background:var(--cloud);
  color:var(--ink);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{font-family:'Space Grotesk','Inter','PingFang SC',sans-serif;line-height:1.08;letter-spacing:-.02em}
.mono{font-family:'Space Mono','SFMono-Regular',monospace}
a{color:inherit;text-decoration:none}
img,svg{display:block}
::selection{background:var(--violet);color:#fff}

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

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--violet);
  background:var(--grad-soft);
  border:1px solid rgba(108,92,231,.2);
  padding:7px 14px;border-radius:999px;text-transform:uppercase;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--coral)}
.dark .eyebrow{color:#fff;background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14)}

.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:15px;
  padding:14px 24px;border-radius:999px;cursor:pointer;border:none;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow-violet)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 28px 70px -20px rgba(108,92,231,.7)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--violet);color:var(--violet);transform:translateY(-2px)}
.dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.18)}
.dark .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.05)}

/* ============================================================
   导航
   ============================================================ */
header.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(244,242,252,.72);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:19px;letter-spacing:.06em}
.brand .logo{width:38px;height:38px;flex:none}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:15px;font-weight:500;color:var(--muted);transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:14px}
.menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;border-radius:2px;transition:.25s}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding:78px 0 90px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-160px;right:-120px;width:560px;height:560px;
  background:radial-gradient(circle,rgba(108,92,231,.28),transparent 62%);
  filter:blur(20px);z-index:0;
}
.hero::after{
  content:"";position:absolute;bottom:-200px;left:-140px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(255,111,145,.22),transparent 62%);
  filter:blur(20px);z-index:0;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.hero h1{font-size:clamp(38px,5.4vw,62px);font-weight:700;margin:22px 0 0}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:clamp(16px,1.6vw,19px);color:var(--muted);margin:22px 0 0;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.trust{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:30px;font-size:13.5px;color:var(--muted);font-weight:500}
.trust .pill{display:inline-flex;align-items:center;gap:7px}
.trust .lock{width:15px;height:15px;color:var(--mint)}

/* ---- 手机外壳 + 聊天界面（CSS 实现，后期可替换为截图） ---- */
.hero-phone{display:flex;justify-content:center;perspective:1400px}
.phone{
  position:relative;width:300px;height:610px;border-radius:46px;
  background:linear-gradient(160deg,#211b45,#0f0c22);
  padding:13px;box-shadow:var(--shadow), 0 0 0 1px rgba(255,255,255,.04) inset;
  animation:floaty 6s ease-in-out infinite;
}
.phone .notch{position:absolute;top:13px;left:50%;transform:translateX(-50%);width:130px;height:26px;background:#0f0c22;border-radius:0 0 16px 16px;z-index:5}
.screen{
  width:100%;height:100%;border-radius:34px;overflow:hidden;
  background:linear-gradient(180deg,#1b1638,#12102a);
  display:flex;flex-direction:column;
}
.chat-top{
  display:flex;align-items:center;gap:11px;padding:34px 18px 14px;
  background:linear-gradient(180deg,rgba(108,92,231,.22),transparent);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.chat-top .av{width:38px;height:38px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;font-family:'Space Grotesk',sans-serif}
.chat-top .who{flex:1}
.chat-top .who b{display:block;color:#fff;font-size:15px;font-weight:600;font-family:'Space Grotesk',sans-serif}
.chat-top .who small{color:var(--mint);font-size:11.5px;display:flex;align-items:center;gap:5px}
.chat-top .who small::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 8px var(--mint)}
.chat-top .enc{color:var(--muted-d);width:18px;height:18px}
.chat-body{flex:1;padding:16px 14px;display:flex;flex-direction:column;gap:10px;overflow:hidden}
.bubble{max-width:78%;padding:10px 13px;font-size:13.5px;line-height:1.45;border-radius:16px;color:#fff;position:relative}
.bubble.in{align-self:flex-start;background:rgba(255,255,255,.09);border-bottom-left-radius:5px}
.bubble.out{align-self:flex-end;background:var(--grad);border-bottom-right-radius:5px;box-shadow:0 8px 22px -10px rgba(108,92,231,.8)}
.bubble.burn{align-self:flex-start;background:rgba(255,111,145,.16);border:1px dashed rgba(255,143,168,.6);color:var(--coral-2);display:flex;align-items:center;gap:7px}
.bubble.burn .fire{font-size:14px}
.bubble .time{display:block;font-size:10px;opacity:.6;margin-top:4px;text-align:right}
.typing{align-self:flex-start;display:flex;gap:4px;padding:13px;background:rgba(255,255,255,.09);border-radius:16px;border-bottom-left-radius:5px}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--muted-d);animation:blink 1.3s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
.chat-input{display:flex;align-items:center;gap:9px;padding:12px 14px 18px;border-top:1px solid rgba(255,255,255,.06)}
.chat-input .field{flex:1;height:36px;border-radius:999px;background:rgba(255,255,255,.08);display:flex;align-items:center;padding:0 14px;color:var(--muted-d);font-size:12.5px}
.chat-input .send{width:36px;height:36px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;flex:none}
.chat-input .send svg{width:17px;height:17px;color:#fff}

/* ============================================================
   通用区块
   ============================================================ */
section{position:relative}
.block{padding:96px 0}
.dark{background:var(--ink);color:#fff}
.dark .sec-head p,.dark .muted{color:var(--muted-d)}
.sec-head{max-width:660px;margin:0 auto 56px;text-align:center}
.sec-head h2{font-size:clamp(28px,3.6vw,42px);font-weight:700;margin:16px 0 0}
.sec-head h2 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head p{font-size:17px;color:var(--muted);margin:16px 0 0}

/* ---- 核心功能卡片 ---- */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.feat{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;
}
.feat:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(108,92,231,.25)}
.feat .ic{width:54px;height:54px;border-radius:15px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.feat .ic svg{width:27px;height:27px;color:var(--violet)}
.feat h3{font-size:19px;font-weight:600;margin-bottom:9px}
.feat p{font-size:14.5px;color:var(--muted)}
.feat .metric{display:inline-block;margin-top:14px;font-family:'Space Mono',monospace;font-size:12.5px;font-weight:700;color:var(--violet);background:var(--grad-soft);padding:5px 11px;border-radius:999px}

/* ============================================================
   功能模块（暗色）—— 6 大模块清单
   ============================================================ */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.mod-card{
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:var(--radius);
  padding:28px 26px;transition:transform .3s var(--ease),border-color .3s;
}
.mod-card:hover{transform:translateY(-6px);border-color:rgba(139,123,255,.5)}
.mod-card .mh{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.mod-card .mh .ic{width:44px;height:44px;border-radius:12px;background:rgba(108,92,231,.18);display:flex;align-items:center;justify-content:center;flex:none}
.mod-card .mh .ic svg{width:22px;height:22px;color:var(--violet-2)}
.mod-card .mh h3{font-size:18px;font-weight:600;color:#fff}
.mod-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.mod-list li{display:flex;gap:9px;align-items:flex-start;font-size:14px;color:var(--muted-d)}
.mod-list li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--mint);margin-top:8px;flex:none}

/* ============================================================
   安全区块（暗色）+ 聊天卡片演示
   ============================================================ */
.sec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:8px}
.sec-card{
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:var(--radius);
  padding:28px;overflow:hidden;transition:transform .3s var(--ease),border-color .3s;
}
.sec-card:hover{transform:translateY(-6px);border-color:rgba(139,123,255,.5)}
.sec-card h3{font-size:20px;font-weight:600;margin-bottom:8px;color:#fff}
.sec-card p{font-size:14.5px;color:var(--muted-d);min-height:44px}

/* 防护数据条 */
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.guard{
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:var(--radius-s);
  padding:24px 22px;transition:transform .3s var(--ease),border-color .3s;
}
.guard:hover{transform:translateY(-5px);border-color:rgba(139,123,255,.5)}
.guard .gk{font-size:13px;color:var(--muted-d);font-weight:600;letter-spacing:.03em}
.guard .gv{font-family:'Space Grotesk',sans-serif;font-size:26px;font-weight:700;color:#fff;margin:10px 0 4px}
.guard .gv span{font-size:14px;color:var(--mint);font-weight:600}
.guard .gd{font-size:12.5px;color:var(--muted-d)}

.demo{
  margin-top:22px;background:linear-gradient(180deg,#15122e,#0f0c22);
  border:1px solid var(--ink-3);border-radius:16px;padding:18px;
  display:flex;flex-direction:column;gap:9px;min-height:150px;justify-content:center;
}
.demo .bubble{max-width:88%;font-size:13px}
.demo .center{text-align:center;color:var(--muted-d);font-size:12px;margin:auto;display:flex;flex-direction:column;align-items:center;gap:10px}
.demo .badge-c{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px}
/* 阅后即焚演示 hover 触发 */
.burn-demo{cursor:pointer}
.burn-demo .msg-real{transition:opacity .5s,filter .5s}
.burn-demo:hover .msg-real{opacity:0;filter:blur(6px)}
.burn-demo .ash{position:absolute;inset:auto 0 0;text-align:center;color:var(--coral-2);font-size:12px;opacity:0;transition:opacity .5s;padding-bottom:18px}
.burn-demo{position:relative}
.burn-demo:hover .ash{opacity:1}
/* 加密 hover：明文 → 密文 */
.enc-demo .plain{transition:opacity .4s}
.enc-demo .cipher{position:absolute;inset:18px;display:flex;align-items:center;color:var(--mint);font-size:11px;word-break:break-all;opacity:0;transition:opacity .4s;line-height:1.5}
.enc-demo{position:relative;cursor:pointer}
.enc-demo:hover .plain{opacity:0}
.enc-demo:hover .cipher{opacity:1}
.hint{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted-d);margin-top:14px}
.hint svg{width:13px;height:13px}

/* ============================================================
   产品矩阵（客户端 + 管理端）
   ============================================================ */
.matrix-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.matrix-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 32px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.matrix-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(108,92,231,.25)}
.matrix-card .tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.04em;color:var(--violet);background:var(--grad-soft);padding:6px 13px;border-radius:999px;margin-bottom:16px;text-transform:uppercase}
.matrix-card h3{font-size:24px;font-weight:700;margin-bottom:10px}
.matrix-card>p{font-size:15px;color:var(--muted);margin-bottom:20px}
.matrix-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.matrix-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink)}
.matrix-list .tick{width:24px;height:24px;border-radius:7px;background:var(--grad);flex:none;display:flex;align-items:center;justify-content:center;margin-top:1px}
.matrix-list .tick svg{width:14px;height:14px;color:#fff}

/* ============================================================
   群管理 / 通用卡片网格
   ============================================================ */
.group-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.group-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-s);padding:26px 22px;text-align:center;transition:transform .3s var(--ease),box-shadow .3s}
.group-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.group-card .gic{width:48px;height:48px;margin:0 auto 16px;border-radius:13px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center}
.group-card .gic svg{width:24px;height:24px;color:var(--violet)}
.group-card b{display:block;font-size:15.5px;font-family:'Space Grotesk',sans-serif;margin-bottom:6px}
.group-card span{font-size:13.5px;color:var(--muted)}

/* ============================================================
   全平台区块（暗色）
   ============================================================ */
.platform-row{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;margin-top:10px}
.plat{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:18px;
  padding:28px 30px;min-width:130px;transition:transform .3s var(--ease),border-color .3s;
}
.plat:hover{transform:translateY(-6px);border-color:rgba(139,123,255,.5)}
.plat svg{width:38px;height:38px;color:#fff}
.plat b{font-size:15px;font-family:'Space Grotesk',sans-serif}
.plat span{font-size:12px;color:var(--muted-d)}

/* ============================================================
   部署方式
   ============================================================ */
.deploy-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.deploy-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.deploy-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(108,92,231,.25)}
.deploy-card .dic{width:52px;height:52px;border-radius:14px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.deploy-card .dic svg{width:26px;height:26px;color:var(--violet)}
.deploy-card h3{font-size:19px;font-weight:600;margin-bottom:14px}
.deploy-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.deploy-list li{display:flex;gap:9px;align-items:flex-start;font-size:14px;color:var(--muted)}
.deploy-list li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--violet);margin-top:8px;flex:none}

/* ============================================================
   应用场景（暗色）
   ============================================================ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:var(--radius);
  padding:32px 28px;transition:transform .3s var(--ease),border-color .3s;
}
.scene-card:hover{transform:translateY(-6px);border-color:rgba(139,123,255,.5)}
.scene-card h3{font-size:19px;font-weight:600;color:#fff;margin-bottom:10px}
.scene-card p{font-size:14.5px;color:var(--muted-d);margin-bottom:20px}
.scene-stats{display:flex;gap:22px;flex-wrap:wrap}
.scene-stats .st b{display:block;font-family:'Space Grotesk',sans-serif;font-size:22px;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.scene-stats .st span{font-size:12px;color:var(--muted-d)}

/* ============================================================
   加密通话区块
   ============================================================ */
.call-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.call-list{list-style:none;margin-top:24px;display:flex;flex-direction:column;gap:18px}
.call-list li{display:flex;gap:14px;align-items:flex-start}
.call-list .ci{width:40px;height:40px;border-radius:11px;background:var(--grad-soft);flex:none;display:flex;align-items:center;justify-content:center}
.call-list .ci svg{width:20px;height:20px;color:var(--violet)}
.call-list b{display:block;font-size:16px;font-family:'Space Grotesk',sans-serif}
.call-list span{font-size:14px;color:var(--muted)}
.call-visual{display:flex;justify-content:center}
.call-card{
  width:100%;max-width:380px;background:linear-gradient(165deg,#1d1840,#12102a);
  border-radius:var(--radius);padding:40px 32px;text-align:center;box-shadow:var(--shadow);
  border:1px solid var(--ink-3);
}
.call-av{width:96px;height:96px;border-radius:50%;background:var(--grad);margin:0 auto 18px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:34px;font-family:'Space Grotesk',sans-serif;font-weight:700;position:relative}
.call-av::after{content:"";position:absolute;inset:-10px;border-radius:50%;border:2px solid rgba(108,92,231,.4);animation:ring 2.4s ease-out infinite}
.call-card .cname{color:#fff;font-size:22px;font-weight:600;font-family:'Space Grotesk',sans-serif}
.call-card .cstat{color:var(--mint);font-size:13px;margin-top:6px;display:inline-flex;align-items:center;gap:6px}
.call-card .cstat::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--mint)}
.call-wave{display:flex;align-items:flex-end;justify-content:center;gap:4px;height:42px;margin:24px 0}
.call-wave i{width:4px;border-radius:4px;background:var(--violet-2);animation:wave 1.1s ease-in-out infinite}
.call-wave i:nth-child(odd){background:var(--coral-2)}
.call-controls{display:flex;justify-content:center;gap:16px;margin-top:8px}
.call-controls .cc{width:50px;height:50px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center}
.call-controls .cc.end{background:var(--coral)}
.call-controls .cc svg{width:22px;height:22px;color:#fff}

/* ============================================================
   联系我们 CTA
   ============================================================ */
.dl-sec{padding-bottom:96px}
.cta{position:relative;overflow:hidden;background:var(--ink);color:#fff;border-radius:34px}
.cta-inner{position:relative;z-index:1;text-align:center;padding:72px 28px}
.cta::before{content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(circle,rgba(108,92,231,.4),transparent 60%);filter:blur(10px)}
.cta::after{content:"";position:absolute;bottom:-150px;right:-80px;width:400px;height:400px;background:radial-gradient(circle,rgba(255,111,145,.3),transparent 60%);filter:blur(10px)}
.cta h2{font-size:clamp(30px,4vw,46px);font-weight:700;margin-bottom:16px}
.cta h2 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cta p{color:var(--muted-d);font-size:17px;max-width:520px;margin:0 auto 34px}
.contact-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* Telegram 联系卡片 */
.tg-card{
  display:inline-flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  padding:16px 24px;border-radius:16px;transition:transform .25s var(--ease),background .2s;
}
.tg-card:hover{transform:translateY(-3px);background:rgba(255,255,255,.14)}
.tg-card .tg-ic{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#2AABEE,#229ED9);display:flex;align-items:center;justify-content:center;flex:none}
.tg-card .tg-ic svg{width:24px;height:24px;color:#fff}
.tg-card .tt{text-align:left;line-height:1.3}
.tg-card .tt small{display:block;font-size:11.5px;color:var(--muted-d)}
.tg-card .tt b{font-size:17px;font-family:'Space Grotesk',sans-serif;font-weight:600;color:#fff}

/* ============================================================
   页脚
   ============================================================ */
footer{background:var(--cloud);padding:60px 0 40px;border-top:1px solid var(--line)}
.foot-grid{display:flex;flex-wrap:wrap;justify-content:space-between;gap:40px;margin-bottom:40px}
.foot-brand{max-width:300px}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{font-size:14px;color:var(--muted)}
.foot-cols{display:flex;gap:64px;flex-wrap:wrap}
.foot-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink);margin-bottom:16px;font-family:'Space Grotesk',sans-serif}
.foot-col a{display:block;font-size:14px;color:var(--muted);margin-bottom:11px;transition:color .2s}
.foot-col a:hover{color:var(--violet)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;padding-top:28px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}

/* ============================================================
   动画
   ============================================================ */
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes blink{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
@keyframes ring{0%{transform:scale(.9);opacity:.8}100%{transform:scale(1.25);opacity:0}}
@keyframes wave{0%,100%{height:10px}50%{height:38px}}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;text-align:center;gap:48px}
  .hero .sub{margin-left:auto;margin-right:auto}
  .hero-actions,.trust{justify-content:center}
  .feat-grid,.feat-grid.cols-3,.mod-grid,.deploy-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}
  .sec-grid{grid-template-columns:1fr}
  .guard-grid{grid-template-columns:repeat(2,1fr)}
  .matrix-grid,.call-grid{grid-template-columns:1fr;gap:28px}
  .group-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:680px){
  .nav-links,.nav-cta .btn-ghost{display:none}
  .menu-btn{display:block}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:var(--cloud);padding:24px 28px;gap:20px;border-bottom:1px solid var(--line)}
  .block{padding:68px 0}
  .feat-grid,.feat-grid.cols-3,.mod-grid,.group-grid,.deploy-grid,.scene-grid{grid-template-columns:1fr}
  .guard-grid{grid-template-columns:1fr}
  .wrap{padding:0 20px}
  .dl-sec{padding-bottom:68px}
  .hero{padding:48px 0 60px}
}

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