/* ==========================================================================
   重庆思微科技股份有限公司 官网 · 深色科技风 / 靛紫渐变
   全站零外链：字体用系统栈，图形用内联 SVG / CSS，图片本地化
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root{
  --bg-0:#05050d;
  --bg-1:#0a0a16;
  --bg-2:#0f0f1f;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.10);
  --border-2:rgba(255,255,255,.18);

  --text:#eceef8;
  --text-dim:#a3a6c0;
  --text-mute:#6f7290;

  --indigo:#6366f1;
  --indigo-l:#818cf8;
  --violet:#8b5cf6;
  --purple:#a855f7;
  --grad:linear-gradient(118deg,var(--indigo-l) 0%,var(--violet) 50%,var(--purple) 100%);
  --glow:0 0 60px rgba(139,92,246,.35);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1240px;
  --nav-h:74px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans CN",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Consolas,"Liberation Mono",monospace;
}

/* ---------- 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-0);color:var(--text);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.02em;text-wrap:balance}
p{margin:0;text-wrap:pretty}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:rgba(139,92,246,.4);color:#fff}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:#2a2b45;border-radius:10px;border:2px solid var(--bg-1)}
::-webkit-scrollbar-thumb:hover{background:#3b3d61}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:28px}
.container.narrow{max-width:900px}
.grad-text{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  letter-spacing:.01em;white-space:nowrap;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .35s var(--ease),border-color .35s var(--ease);
}
.btn-primary{
  background:var(--grad);color:#fff;
  box-shadow:0 8px 28px rgba(99,102,241,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(139,92,246,.48)}
.btn-ghost{
  border:1px solid var(--border-2);color:var(--text);
  background:rgba(255,255,255,.03);backdrop-filter:blur(8px);
}
.btn-ghost:hover{border-color:rgba(168,85,247,.6);background:rgba(139,92,246,.12);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease),border-color .4s var(--ease),backdrop-filter .4s var(--ease);
}
.nav.scrolled{
  background:rgba(8,8,18,.82);backdrop-filter:blur(18px) saturate(150%);
  border-bottom-color:var(--border);
}
.nav-inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{display:block;width:32px;height:32px;filter:drop-shadow(0 4px 14px rgba(139,92,246,.5))}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:17px;letter-spacing:.02em}
.brand-text em{
  font-style:normal;font-family:var(--mono);font-size:9.5px;
  letter-spacing:.28em;color:var(--text-mute);
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:9px 14px;border-radius:10px;
  font-size:14.5px;color:var(--text-dim);transition:color .3s var(--ease),background .3s var(--ease);
}
.nav-links a:hover{color:var(--text);background:var(--surface)}
.nav-links a.is-current{color:#fff}
.nav-links a.is-current::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--grad);
}
.nav-cta{display:flex;align-items:center;gap:12px;flex-shrink:0}

.nav-toggle{display:none;width:40px;height:40px;padding:10px;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text);transition:transform .35s var(--ease),opacity .25s var(--ease)}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.open .nav-toggle span:nth-child(2){opacity:0}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动端菜单面板：作为 .nav 的兄弟节点，避免祖先 backdrop-filter 生成包含块 */
.mobile-menu{
  position:fixed;left:0;right:0;top:var(--nav-h);z-index:99;
  padding:16px 28px 30px;
  background:rgba(8,8,18,.97);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  display:none;flex-direction:column;gap:2px;
  max-height:calc(100vh - var(--nav-h));overflow-y:auto;
  transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:transform .35s var(--ease),opacity .35s var(--ease);
}
.mobile-menu.show{transform:translateY(0);opacity:1;pointer-events:auto}
.mobile-menu a{
  padding:14px 4px;font-size:16px;color:var(--text-dim);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-menu a:last-of-type{border-bottom:0}
.mobile-menu .btn{margin-top:18px}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;align-items:center;padding:calc(var(--nav-h) + 60px) 0 110px;
  overflow:hidden;isolation:isolate;
}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:right center;opacity:.9}
.hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(90% 70% at 12% 45%,rgba(5,5,13,.97) 0%,rgba(5,5,13,.72) 45%,rgba(5,5,13,.25) 75%,transparent 100%),
    linear-gradient(180deg,rgba(5,5,13,.85) 0%,transparent 28%,transparent 60%,var(--bg-0) 100%);
}
.hero-grid{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(129,140,248,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(129,140,248,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(70% 60% at 30% 45%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(70% 60% at 30% 45%,#000 0%,transparent 78%);
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:56px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 16px 7px 12px;border-radius:999px;
  border:1px solid rgba(139,92,246,.32);background:rgba(99,102,241,.10);
  font-size:13px;color:#c7c9e8;margin-bottom:26px;
}
.hero-badge .dot{
  width:7px;height:7px;border-radius:50%;background:var(--purple);
  box-shadow:0 0 0 0 rgba(168,85,247,.6);animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(168,85,247,.55)}
  70%{box-shadow:0 0 0 10px rgba(168,85,247,0)}
  100%{box-shadow:0 0 0 0 rgba(168,85,247,0)}
}
.hero h1{
  font-size:clamp(38px,5.4vw,66px);line-height:1.14;letter-spacing:-.035em;margin-bottom:24px;
}
.hero-sub{font-size:17px;color:var(--text-dim);max-width:600px;margin-bottom:34px}
.hero-sub strong{color:var(--text);font-weight:600}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags li{
  padding:6px 14px;border-radius:8px;font-size:12.5px;color:var(--text-mute);
  border:1px solid var(--border);background:rgba(255,255,255,.02);
}

/* 首屏右侧玻璃卡 */
.hero-visual{position:relative;height:440px}
.glass-card{
  position:absolute;border-radius:16px;
  background:rgba(14,14,30,.62);border:1px solid var(--border-2);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 24px 60px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.06);
}
.gc-main{
  inset:auto 0 60px auto;width:min(400px,100%);overflow:hidden;
  animation:float 7s ease-in-out infinite;
}
.gc-head{
  display:flex;align-items:center;gap:10px;padding:11px 14px;
  border-bottom:1px solid var(--border);background:rgba(255,255,255,.03);
}
.gc-dots{display:flex;gap:5px}
.gc-dots i{width:9px;height:9px;border-radius:50%;background:#33354f}
.gc-dots i:nth-child(1){background:#f87171aa}
.gc-dots i:nth-child(2){background:#fbbf24aa}
.gc-dots i:nth-child(3){background:#34d399aa}
.gc-title{font-family:var(--mono);font-size:11.5px;color:var(--text-mute)}
.gc-body{padding:16px 18px}
.gc-body pre{margin:0;font-family:var(--mono);font-size:12.5px;line-height:2.05;color:#c9cbe6;white-space:pre-wrap}
.c-key{color:#34d399}.c-ok{color:#818cf8}.c-arrow{color:var(--purple)}
.c-cursor{animation:blink 1.05s steps(1) infinite;color:var(--purple)}
@keyframes blink{50%{opacity:0}}
.gc-float{padding:16px 18px;display:flex;flex-direction:column;gap:4px;align-items:flex-start}
.gc-metric{font-size:26px;font-weight:800;letter-spacing:-.03em;font-family:var(--mono)}
.gc-label{font-size:12px;color:var(--text-mute)}
.gc-a{width:186px;top:34px;left:0;animation:float 6s ease-in-out infinite .4s}
.gc-b{width:196px;top:150px;left:-26px;animation:float 8s ease-in-out infinite 1.1s}
.gc-c{width:172px;bottom:6px;right:34px;animation:float 6.6s ease-in-out infinite .8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-13px)}}

.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:26px;height:42px;display:flex;align-items:flex-start;justify-content:center;
  border:1.5px solid var(--border-2);border-radius:14px;opacity:.55;
}
.wheel{width:3px;height:8px;margin-top:7px;border-radius:3px;background:var(--violet);animation:wheel 1.9s var(--ease) infinite}
@keyframes wheel{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* ---------- 数据条 ---------- */
.stats{position:relative;padding:0 0 8px;background:var(--bg-0)}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transform:translateY(-64px);box-shadow:0 30px 70px rgba(0,0,0,.5);
}
.stat{padding:34px 26px;text-align:center;background:linear-gradient(180deg,var(--bg-2),var(--bg-1))}
.stat-num{font-size:clamp(32px,4vw,46px);font-weight:800;letter-spacing:-.04em;line-height:1.1}
.stat-label{margin-top:8px;font-size:13px;color:var(--text-mute)}

/* ---------- 通用分区 ---------- */
.section{padding:110px 0;position:relative}
.section-alt{background:var(--bg-1)}
.section-alt::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 40% at 80% 0%,rgba(99,102,241,.10),transparent 70%);
}
.section > .container{position:relative;z-index:1}
.section-head{max-width:760px;margin:0 auto 62px;text-align:center}
.section-head.left{margin-inline:0;text-align:left}
.eyebrow{
  display:inline-block;margin-bottom:14px;padding:5px 14px;border-radius:999px;
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--indigo-l);border:1px solid rgba(129,140,248,.28);background:rgba(99,102,241,.08);
}
.section-head h2{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.03em;margin-bottom:16px}
.section-head p{color:var(--text-dim);font-size:16.5px}

/* ---------- 业务切换标签 ---------- */
.biz-tabs{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:44px;
}
.biz-tab{
  display:flex;align-items:center;gap:14px;padding:18px 20px;text-align:left;
  border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);
  transition:border-color .35s var(--ease),background .35s var(--ease),transform .35s var(--ease);
}
.biz-tab:hover{transform:translateY(-3px);border-color:var(--border-2)}
.biz-tab.is-active{
  border-color:rgba(139,92,246,.55);
  background:linear-gradient(135deg,rgba(99,102,241,.16),rgba(168,85,247,.10));
  box-shadow:0 12px 34px rgba(99,102,241,.20);
}
.biz-tab-ico{
  display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;border-radius:11px;
  border:1px solid var(--border-2);color:var(--indigo-l);background:rgba(255,255,255,.04);
}
.biz-tab.is-active .biz-tab-ico{color:#fff;border-color:transparent;background:var(--grad)}
.biz-tab-ico svg{width:22px;height:22px}
.biz-tab-txt{display:flex;flex-direction:column;line-height:1.4;min-width:0}
.biz-tab-txt strong{font-size:15.5px}
.biz-tab-txt em{font-style:normal;font-size:12.5px;color:var(--text-mute)}

.biz-panel{
  display:none;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
  gap:52px;align-items:center;
}
.biz-panel.is-active{display:grid;animation:panelIn .55s var(--ease)}
@keyframes panelIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.biz-media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.biz-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .8s var(--ease)}
.biz-panel.is-active .biz-media:hover img{transform:scale(1.05)}
.biz-media-glow{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(150deg,rgba(99,102,241,.20),transparent 45%,rgba(168,85,247,.22));
  mix-blend-mode:screen;
}
.biz-body h3{font-size:clamp(22px,2.5vw,30px);letter-spacing:-.025em;margin-bottom:16px}
.biz-body > p{color:var(--text-dim);margin-bottom:26px}
.feature-list{display:flex;flex-direction:column;gap:15px;margin-bottom:26px}
.feature-list li{display:flex;gap:12px;align-items:flex-start}
.tick{
  position:relative;flex-shrink:0;width:20px;height:20px;margin-top:4px;border-radius:6px;
  background:linear-gradient(135deg,rgba(99,102,241,.28),rgba(168,85,247,.28));
  border:1px solid rgba(139,92,246,.4);
}
.tick::after{
  content:"";position:absolute;left:6px;top:3px;width:5px;height:9px;
  border:2px solid #c4b5fd;border-top:0;border-left:0;transform:rotate(42deg);
}
.feature-list strong{display:block;font-size:15px;font-weight:600;margin-bottom:2px}
.feature-list em{font-style:normal;font-size:13.5px;color:var(--text-mute);line-height:1.65;display:block}

.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:5px 13px;border-radius:8px;font-family:var(--mono);font-size:12px;
  color:var(--text-dim);border:1px solid var(--border);background:rgba(255,255,255,.03);
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.chip:hover{border-color:rgba(139,92,246,.5);color:#d6d8f5}

/* ---------- AI Agent 详解 ---------- */
.agent-flow{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:56px;
}
.af-step{
  position:relative;padding:24px 20px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
  transition:transform .4s var(--ease),border-color .4s var(--ease),background .4s var(--ease);
}
.af-step:hover{transform:translateY(-6px);border-color:rgba(139,92,246,.5);background:var(--surface-2)}
.af-step::after{
  content:"";position:absolute;right:-9px;top:50%;width:16px;height:16px;
  border-top:1.5px solid var(--border-2);border-right:1.5px solid var(--border-2);
  transform:translateY(-50%) rotate(45deg);
}
.af-step:last-child::after{display:none}
.af-idx{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  color:var(--indigo-l);margin-bottom:12px;
}
.af-step h4{font-size:16px;margin-bottom:9px}
.af-step p{font-size:13.5px;color:var(--text-mute);line-height:1.7}

.agent-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.agent-card{
  padding:30px 30px 26px;border-radius:var(--radius);border:1px solid var(--border);
  background:linear-gradient(150deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  position:relative;overflow:hidden;
  transition:transform .45s var(--ease),border-color .45s var(--ease),box-shadow .45s var(--ease);
}
.agent-card::before{
  content:"";position:absolute;inset:0;opacity:0;pointer-events:none;
  background:radial-gradient(80% 60% at 20% 0%,rgba(139,92,246,.18),transparent 70%);
  transition:opacity .45s var(--ease);
}
.agent-card:hover{transform:translateY(-6px);border-color:rgba(139,92,246,.45);box-shadow:0 22px 50px rgba(0,0,0,.45)}
.agent-card:hover::before{opacity:1}
.agent-card h4{font-size:18.5px;margin-bottom:11px;position:relative}
.agent-card p{font-size:14.5px;color:var(--text-dim);margin-bottom:22px;position:relative}
.ac-metric{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:16px;border-top:1px dashed var(--border-2);position:relative;
}
.ac-metric strong{font-size:12px;font-weight:500;color:var(--text-mute);letter-spacing:.06em}
.ac-metric span{font-family:var(--mono);font-size:14px;color:#c4b5fd}

/* ---------- 直播详解 ---------- */
.live-wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:start}
.live-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.lf-item{
  padding:24px 22px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
  transition:border-color .4s var(--ease),transform .4s var(--ease);
}
.lf-item:hover{border-color:rgba(139,92,246,.45);transform:translateY(-4px)}
.lf-item h4{font-size:16px;margin-bottom:9px}
.lf-item p{font-size:13.8px;color:var(--text-mute);line-height:1.72}
.live-side{position:sticky;top:calc(var(--nav-h) + 30px)}
.live-metrics{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
}
.lm-item{padding:30px 20px;text-align:center;background:var(--bg-2);display:flex;flex-direction:column;gap:7px}
.lm-item strong{font-size:27px;letter-spacing:-.03em;font-family:var(--mono)}
.lm-item span{font-size:12.5px;color:var(--text-mute)}
.live-note{
  margin-top:18px;padding:16px 18px;border-radius:var(--radius-sm);
  border:1px solid rgba(129,140,248,.22);background:rgba(99,102,241,.07);
}
.live-note p{font-size:12.8px;color:#9ea2c4;line-height:1.75}

/* ---------- 行业方案 ---------- */
.sol-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.sol-card{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);
  background:var(--surface);
  transition:transform .5s var(--ease),border-color .5s var(--ease),box-shadow .5s var(--ease);
}
.sol-card:hover{transform:translateY(-8px);border-color:rgba(139,92,246,.45);box-shadow:0 28px 60px rgba(0,0,0,.5)}
.sol-media{position:relative;overflow:hidden;aspect-ratio:16/8}
.sol-media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.sol-card:hover .sol-media img{transform:scale(1.07)}
.sol-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 30%,rgba(10,10,22,.9));
}
.sol-body{padding:26px 28px 30px}
.sol-tag{
  display:inline-block;margin-bottom:13px;padding:4px 12px;border-radius:999px;
  font-size:11.5px;letter-spacing:.08em;color:#c4b5fd;
  border:1px solid rgba(168,85,247,.35);background:rgba(168,85,247,.10);
}
.sol-body h3{font-size:21px;margin-bottom:11px}
.sol-body > p{font-size:14.5px;color:var(--text-dim);margin-bottom:18px}
.sol-body ul{display:flex;flex-direction:column;gap:9px}
.sol-body li{position:relative;padding-left:18px;font-size:13.5px;color:var(--text-mute)}
.sol-body li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--grad);transform:rotate(45deg);
}

/* ---------- 服务流程 ---------- */
.timeline{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:22px 22px;
}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:11px;height:1px;
  background:linear-gradient(90deg,transparent,var(--border-2) 12%,var(--border-2) 88%,transparent);
}
.tl-item{position:relative;padding-top:0}
.tl-dot{
  position:absolute;left:26px;top:6px;width:11px;height:11px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--violet);
  box-shadow:0 0 0 4px rgba(139,92,246,.15);
}
.tl-card{
  margin-top:34px;padding:26px 26px 24px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);height:calc(100% - 34px);
  transition:border-color .4s var(--ease),background .4s var(--ease),transform .4s var(--ease);
}
.tl-item:hover .tl-card{border-color:rgba(139,92,246,.45);background:var(--surface-2);transform:translateY(-4px)}
.tl-card em{
  font-style:normal;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--indigo-l);display:block;margin-bottom:10px;
}
.tl-card h4{font-size:17px;margin-bottom:10px}
.tl-card p{font-size:13.8px;color:var(--text-mute);line-height:1.75}

/* ---------- 技术栈 ---------- */
.tech-cols{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:44px}
.tech-col{
  padding:26px 28px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
}
.tech-col h4{font-size:15px;margin-bottom:16px;letter-spacing:.02em;color:var(--text)}
.tech-banner{
  position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);
  min-height:300px;display:flex;align-items:flex-end;
}
.tech-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72}
.tb-overlay{
  position:relative;padding:40px 42px;width:100%;
  background:linear-gradient(0deg,rgba(5,5,13,.94) 20%,rgba(5,5,13,.35) 70%,transparent);
}
.tb-overlay h3{font-size:clamp(20px,2.4vw,27px);margin-bottom:11px}
.tb-overlay p{font-size:15px;color:var(--text-dim);max-width:640px}

/* ---------- 关于我们 ---------- */
.about-wrap{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:60px;align-items:center}
.about-media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.about-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.about-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(99,102,241,.22),transparent 55%,rgba(168,85,247,.26));
  mix-blend-mode:screen;pointer-events:none;
}
.about-badge{
  position:absolute;left:20px;bottom:20px;display:flex;flex-direction:column;gap:1px;
  padding:14px 20px;border-radius:13px;
  background:rgba(8,8,18,.72);border:1px solid var(--border-2);backdrop-filter:blur(12px);
}
.about-badge strong{font-family:var(--mono);font-size:22px;letter-spacing:.06em;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.about-badge span{font-size:11px;letter-spacing:.16em;color:var(--text-mute);text-transform:uppercase}
.about-body > p{color:var(--text-dim);margin-bottom:17px;font-size:15.5px}
.about-body > p strong{color:var(--text);font-weight:600}
.about-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:28px 0 32px}
.about-points li{
  padding:18px 20px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
}
.about-points strong{display:block;font-size:14.5px;margin-bottom:6px}
.about-points span{font-size:13px;color:var(--text-mute);line-height:1.65}
.about-cta{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.about-note{font-size:13px;color:var(--text-mute)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface);overflow:hidden;
  transition:border-color .35s var(--ease),background .35s var(--ease);
}
.faq-item[open]{border-color:rgba(139,92,246,.45);background:var(--surface-2)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-ico{position:relative;flex-shrink:0;width:18px;height:18px}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--indigo-l);
  transform:translate(-50%,-50%);transition:transform .35s var(--ease),opacity .35s var(--ease);
}
.faq-ico::before{width:15px;height:1.8px}
.faq-ico::after{width:1.8px;height:15px}
.faq-item[open] .faq-ico::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-body{padding:0 24px 22px}
.faq-body p{font-size:14.8px;color:var(--text-dim);line-height:1.85}

/* ---------- 联系我们 ---------- */
.contact{padding-bottom:120px}
.contact-card{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:0;
  border-radius:24px;overflow:hidden;border:1px solid var(--border-2);
  background:linear-gradient(140deg,rgba(99,102,241,.14),rgba(15,15,31,.9) 45%,rgba(168,85,247,.12));
  box-shadow:0 40px 90px rgba(0,0,0,.55);
}
.cc-left{padding:52px 48px}
.cc-left h2{font-size:clamp(26px,3.2vw,38px);letter-spacing:-.03em;margin:14px 0 18px}
.cc-left > p{color:var(--text-dim);font-size:15.5px;margin-bottom:34px}
.cc-info{display:flex;flex-direction:column;gap:20px}
.cc-info li{display:flex;align-items:flex-start;gap:14px}
.cc-info svg{flex-shrink:0;margin-top:3px;color:var(--indigo-l)}
.cc-info em{display:block;font-style:normal;font-size:12px;color:var(--text-mute);letter-spacing:.06em}
.cc-info strong{display:block;font-size:15.5px;font-weight:600;letter-spacing:.01em}

.cc-form{
  padding:52px 48px;background:rgba(6,6,15,.55);border-left:1px solid var(--border);
  backdrop-filter:blur(10px);
}
.cc-form h3{font-size:20px;margin-bottom:26px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:8px}
.field label span{color:var(--purple)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:11px;font:inherit;font-size:14.5px;color:var(--text);
  background:rgba(255,255,255,.04);border:1px solid var(--border);outline:none;
  transition:border-color .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
}
.field textarea{resize:vertical;min-height:104px;line-height:1.7}
.field select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%236f7290' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;padding-right:40px;
}
.field select option{background:#12122a;color:var(--text)}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(139,92,246,.7);background:rgba(139,92,246,.07);
  box-shadow:0 0 0 3px rgba(139,92,246,.15);
}
.field input::placeholder,.field textarea::placeholder{color:#565874}
.form-tip{margin-top:12px;font-size:12px;color:var(--text-mute);text-align:center}
.form-msg{margin-top:12px;font-size:13.5px;text-align:center;min-height:20px;color:#a5b4fc}
.form-msg.err{color:#fca5a5}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--border);background:var(--bg-1);padding:64px 0 30px}
.footer-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:56px;padding-bottom:46px;border-bottom:1px solid var(--border)}
.f-brand p{margin-top:20px;font-size:13.5px;color:var(--text-mute);line-height:1.9}
.f-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.f-col{display:flex;flex-direction:column;gap:11px}
.f-col h5{font-size:13px;letter-spacing:.1em;color:var(--text);margin-bottom:8px}
.f-col a{font-size:13.5px;color:var(--text-mute);transition:color .3s var(--ease),transform .3s var(--ease)}
.f-col a:hover{color:#c4b5fd;transform:translateX(3px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:26px;font-size:12.5px;color:var(--text-mute);
}
.f-legal{display:flex;align-items:center;gap:10px}
.f-legal a{color:var(--text-mute);transition:color .3s var(--ease)}
.f-legal a:hover{color:var(--indigo-l)}

/* ---------- 滚动进场动画 ---------- */
.fade-up{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.fade-up.in{opacity:1;transform:none}
.delay-1{transition-delay:.09s}.delay-2{transition-delay:.18s}
.delay-3{transition-delay:.27s}.delay-4{transition-delay:.36s}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:80;
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:rgba(14,14,30,.8);border:1px solid var(--border-2);color:var(--text);
  backdrop-filter:blur(12px);opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .4s var(--ease),transform .4s var(--ease),border-color .4s var(--ease);
}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:rgba(168,85,247,.6)}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links{gap:0}
  .nav-links a{padding:9px 10px;font-size:13.5px}
}
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:60px}
  .hero{min-height:auto;padding-bottom:90px}
  .hero-visual{height:400px;max-width:560px}
  .biz-panel,.biz-panel.is-active{grid-template-columns:1fr;gap:34px}
  .live-wrap{grid-template-columns:1fr;gap:38px}
  .live-side{position:static}
  .about-wrap{grid-template-columns:1fr;gap:40px}
  .agent-flow{grid-template-columns:repeat(2,1fr);gap:16px}
  .af-step::after{display:none}
  .contact-card{grid-template-columns:1fr}
  .cc-form{border-left:0;border-top:1px solid var(--border)}
  .footer-top{grid-template-columns:1fr;gap:40px}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{display:flex}
  .nav-cta .btn{display:none}
}
@media (max-width:760px){
  :root{--nav-h:66px}
  .container{padding-inline:20px}
  .nav-inner{padding-inline:20px}
  .section{padding:76px 0}
  .stats-grid{grid-template-columns:repeat(2,1fr);transform:translateY(-40px)}
  .stat{padding:26px 16px}
  .biz-tabs{grid-template-columns:1fr}
  .agent-grid,.sol-grid,.tech-cols,.live-feats,.about-points{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .timeline::before{display:none}
  .tl-dot{top:26px}
  .tl-card{margin-top:0;padding-left:46px}
  .hero h1{font-size:clamp(31px,8.6vw,44px)}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{flex:1 1 100%}
  /* 窄屏：悬浮代码窗易互相压叠，改为三个指标胶囊横向排布 */
  .hero-visual{display:flex;flex-wrap:wrap;gap:10px;height:auto;max-width:none}
  .gc-main{display:none}
  .gc-float{position:static;width:auto;flex:1 1 30%;min-width:120px;animation:none;padding:14px 16px}
  .gc-metric{font-size:20px}
  .gc-label{font-size:11px}
  /* 窄屏加强遮罩，保证文字在复杂底图上的可读性 */
  .hero-veil{
    background:
      linear-gradient(180deg,rgba(5,5,13,.90) 0%,rgba(5,5,13,.62) 40%,rgba(5,5,13,.80) 78%,var(--bg-0) 100%),
      radial-gradient(120% 60% at 20% 30%,rgba(5,5,13,.85) 0%,transparent 65%);
  }
  .gc-b{left:auto}
  .cc-left,.cc-form{padding:34px 24px}
  .f-cols{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .scroll-hint{display:none}
}
@media (max-width:400px){
  .live-metrics{grid-template-columns:1fr}
  .f-cols{grid-template-columns:1fr}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .fade-up{opacity:1;transform:none}
}

/* ---------- 打印 ---------- */
@media print{
  .nav,.hero-bg,.scroll-hint,.to-top,.cc-form{display:none}
  body{background:#fff;color:#000}
}