/* ===== 旺旺商聊 — 暖橙·商贸红火风 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#fef9f2;
  --bg2:#fff7ed;
  --bg3:#fff1e6;
  --card:#ffffff;
  /* 主色：商贸红 */
  --p:#e6392a;
  --p2:#f04e30;
  --p3:#f87163;
  /* 辅色：暖橙金 */
  --s:#f97316;
  --s2:#fb923c;
  --s3:#fdba74;
  /* 金色点缀 */
  --gold:#f59e0b;
  --gold2:#fbbf24;
  /* 文字 */
  --t1:#1c1917;
  --t2:#5c5048;
  --t3:#9c8e82;
  /* 边框 & 阴影 */
  --border:#f0e4d8;
  --border2:#e8d5c4;
  --radius:12px;
  --radius2:16px;
  --radius3:20px;
  --shadow:0 4px 20px rgba(120,60,20,0.06);
  --shadow-hover:0 8px 32px rgba(230,57,42,0.1);
  --trans:0.3s cubic-bezier(0.4,0,0.2,1);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--t1);line-height:1.6;overflow-x:hidden}

/* ---- 导航 ---- */
.nav-bar{position:sticky;top:0;z-index:100;background:rgba(254,249,242,0.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:var(--trans)}
.nav-bar.scrolled{background:rgba(254,249,242,0.96);box-shadow:0 2px 20px rgba(120,60,20,0.06)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--t1);font-weight:800;font-size:1.2rem;letter-spacing:-0.02em}
.nav-brand .brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--p),var(--s));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;font-weight:900;box-shadow:0 2px 8px rgba(230,57,42,0.25)}
.nav-brand .accent{color:var(--p);font-weight:800}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{text-decoration:none;color:var(--t2);font-size:0.9rem;font-weight:500;transition:var(--trans)}
.nav-menu a:hover{color:var(--p2)}
.nav-menu .btn-nav{background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;padding:8px 20px;border-radius:8px;font-weight:600;font-size:0.85rem;transition:var(--trans);box-shadow:0 2px 12px rgba(230,57,42,0.25)}
.nav-menu .btn-nav:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(230,57,42,0.4);color:#fff}
.nav-toggle{display:none;background:none;border:none;color:var(--t1);font-size:1.5rem;cursor:pointer;padding:4px}

/* ---- 按钮系统 ---- */
.btn-fill{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:0.95rem;font-weight:600;text-decoration:none;transition:var(--trans);cursor:pointer;border:none;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;box-shadow:0 4px 16px rgba(230,57,42,0.25)}
.btn-fill:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(230,57,42,0.4)}
.btn-line{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:0.95rem;font-weight:600;text-decoration:none;transition:var(--trans);cursor:pointer;background:var(--card);color:var(--p);border:1.5px solid var(--border2)}
.btn-line:hover{transform:translateY(-2px);border-color:var(--p2);box-shadow:var(--shadow-hover)}
.btn-muted{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:0.95rem;font-weight:600;text-decoration:none;transition:var(--trans);cursor:pointer;background:var(--bg2);color:var(--t2);border:1px solid var(--border)}
.btn-muted:hover{background:var(--bg3);color:var(--p);border-color:var(--p2)}
.btn-white{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:0.95rem;font-weight:600;text-decoration:none;transition:var(--trans);cursor:pointer;background:var(--card);color:var(--t1);border:1px solid var(--border);box-shadow:var(--shadow)}
.btn-white:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--p2)}

/* ---- 通用节 ---- */
.sec{padding:100px 24px;max-width:1200px;margin:0 auto}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .label{display:inline-block;padding:6px 16px;border-radius:20px;font-size:0.8rem;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:var(--p);background:rgba(230,57,42,0.08);border:1px solid rgba(230,57,42,0.15);margin-bottom:20px}
.sec-head h2{font-size:2.4rem;font-weight:900;letter-spacing:-0.03em;line-height:1.3;margin-bottom:12px}
.sec-head h2 em{background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-style:normal}
.sec-head p{color:var(--t2);font-size:1rem;max-width:600px;margin:0 auto}

/* ---- Hero ---- */
.hero{padding:60px 24px 100px;max-width:1200px;margin:0 auto}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text .tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:0.8rem;font-weight:600;color:var(--p);background:rgba(230,57,42,0.06);border:1px solid rgba(230,57,42,0.15);margin-bottom:24px}
.hero-text h1{font-size:3rem;font-weight:900;line-height:1.15;letter-spacing:-0.04em;margin-bottom:20px}
.hero-text h1 em{background:linear-gradient(135deg,var(--p),var(--s),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-style:normal}
.hero-text .desc{font-size:1.05rem;color:var(--t2);line-height:1.7;margin-bottom:32px;max-width:480px}
.hero-btns{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.hero-btns .ver{font-size:0.78rem;color:var(--t3);margin-left:4px}

/* 聊天可视化 */
.chat-visual{position:relative}
.chat-window{background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);overflow:hidden;box-shadow:var(--shadow-hover)}
.chat-top{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px;background:var(--bg2)}
.ct-av{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--s),var(--gold));display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.ct-name{font-size:0.9rem;font-weight:700;color:var(--t1)}
.ct-st{font-size:0.72rem;color:var(--t3)}
.chat-body{padding:16px 20px;display:flex;flex-direction:column;gap:14px;min-height:240px}
.cm{max-width:80%;padding:10px 14px;border-radius:14px;font-size:0.82rem;line-height:1.55;position:relative}
.cm.left{align-self:flex-start;background:var(--bg2);border-bottom-left-radius:4px;color:var(--t1)}
.cm.right{align-self:flex-end;background:linear-gradient(135deg,var(--p),var(--p2));border-bottom-right-radius:4px;color:#fff}
.cm .cmt{display:block;font-size:0.65rem;color:var(--t3);margin-top:4px;text-align:right}
.cm.right .cmt{color:rgba(255,255,255,0.6)}
.cm-file{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:8px 12px;margin-bottom:4px;font-size:0.76rem}
.cm-file .cmf-name{font-weight:600;margin-bottom:2px}
.cm-file .cmf-tag{font-size:0.68rem;color:var(--p);font-weight:600}
.cm-in{display:flex;gap:8px;padding:12px 16px;border-top:1px solid var(--border);background:var(--card)}
.cm-in input{flex:1;border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:0.85rem;outline:none;background:var(--bg);color:var(--t1);transition:var(--trans)}
.cm-in input:focus{border-color:var(--p2);box-shadow:0 0 0 3px rgba(230,57,42,0.08)}
.cm-in .btn-send{padding:10px 20px;border-radius:8px;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;border:none;font-weight:600;font-size:0.82rem;cursor:pointer;transition:var(--trans)}
.cm-in .btn-send:hover{box-shadow:0 2px 12px rgba(230,57,42,0.3)}
.chat-badge{position:absolute;bottom:-16px;left:50%;transform:translateX(-50%);background:var(--card);border:1px solid var(--border2);border-radius:10px;padding:10px 20px;display:flex;align-items:center;gap:8px;box-shadow:var(--shadow);font-size:0.8rem;font-weight:600;color:var(--t1);white-space:nowrap}
.chat-badge .cb-dot{width:8px;height:8px;border-radius:50%;background:var(--p);animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{opacity:1;box-shadow:0 0 6px var(--p)}50%{opacity:0.4;box-shadow:0 0 2px var(--p)}}

/* 数据条 */
.hl-strip{background:linear-gradient(135deg,rgba(230,57,42,0.04),rgba(249,115,22,0.06));border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.hl-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;height:80px;align-items:center}
.hi{text-align:center;position:relative}
.hi:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:1px;height:32px;background:var(--border2)}
.hin{font-size:1.8rem;font-weight:900;background:linear-gradient(135deg,var(--p),var(--s));-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2;margin-bottom:4px;font-family:"Inter",sans-serif;letter-spacing:-0.02em}
.hil{font-size:0.8rem;color:var(--t2);font-weight:500}

/* 功能卡片 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);padding:32px 28px;transition:var(--trans);position:relative;box-shadow:var(--shadow)}
.feat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(230,57,42,0.2)}
.feat-card .fc-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(230,57,42,0.1),rgba(249,115,22,0.1));display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.feat-card h3{font-size:1.1rem;font-weight:700;margin-bottom:10px}
.feat-card p{font-size:0.9rem;color:var(--t2);line-height:1.7}

/* 场景区 */
.role-sec{background:linear-gradient(180deg,var(--bg2),var(--bg),var(--bg2))}
.role-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.role-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);padding:28px 24px;text-align:center;transition:var(--trans);box-shadow:var(--shadow)}
.role-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(230,57,42,0.2)}
.role-card .ri{display:inline-flex;width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,rgba(230,57,42,0.08),rgba(249,115,22,0.08));align-items:center;justify-content:center;font-size:1.8rem;margin-bottom:16px}
.role-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.role-card p{font-size:0.88rem;color:var(--t2);line-height:1.65}

/* 信任区 */
.trust-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trust-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);padding:28px 20px;text-align:center;transition:var(--trans);box-shadow:var(--shadow)}
.trust-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.trust-card .ti{font-size:2rem;display:block;margin-bottom:10px}
.trust-card h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.trust-card p{font-size:0.82rem;color:var(--t2)}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden;background:var(--card);transition:var(--trans)}
.faq-item.open{border-color:rgba(230,57,42,0.25);box-shadow:var(--shadow-hover)}
.faq-q{width:100%;background:none;border:none;padding:18px 24px;text-align:left;font-size:0.95rem;font-weight:600;color:var(--t1);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q .arrow{font-size:0.7rem;color:var(--t3);transition:transform var(--trans)}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);color:var(--p)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.4s ease;padding:0 24px;font-size:0.9rem;color:var(--t2);line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 20px}

/* CTA */
.cta-box{text-align:center;background:linear-gradient(135deg,rgba(230,57,42,0.04),rgba(249,115,22,0.06),rgba(245,158,11,0.04));border:1px solid rgba(230,57,42,0.12);border-radius:var(--radius3);padding:64px 32px}
.cta-box h2{font-size:2.2rem;font-weight:900;margin-bottom:12px;letter-spacing:-0.03em}
.cta-box p{color:var(--t2);font-size:1rem;margin-bottom:28px}
.cta-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* Footer */
.footer{padding:60px 24px 30px;max-width:1200px;margin:0 auto;border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .fl{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;margin-bottom:12px}
.footer-brand .fl .fb-icon{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--p),var(--s));display:flex;align-items:center;justify-content:center;color:#fff;font-size:0.9rem;font-weight:900}
.footer-brand .fl .fc{color:var(--p)}
.footer-brand p{font-size:0.85rem;color:var(--t2);line-height:1.6;max-width:280px}
.footer-col h4{font-size:0.85rem;font-weight:700;color:var(--t1);margin-bottom:16px;text-transform:uppercase;letter-spacing:0.05em}
.footer-col a{display:block;font-size:0.85rem;color:var(--t2);text-decoration:none;margin-bottom:10px;transition:var(--trans)}
.footer-col a:hover{color:var(--p2)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--border);font-size:0.8rem;color:var(--t3);flex-wrap:wrap;gap:12px}

/* ===== 下载页样式 ===== */
.dl-hero{padding:80px 24px 60px;text-align:center;max-width:1200px;margin:0 auto}
.dl-hero h1{font-size:2.8rem;font-weight:900;letter-spacing:-0.04em;margin-bottom:12px}
.dl-hero .dl-sub{color:var(--t2);font-size:1.05rem;margin-bottom:24px}
.dl-meta{display:flex;justify-content:center;gap:24px;flex-wrap:wrap}
.dl-meta span{font-size:0.85rem;color:var(--t2);display:flex;align-items:center;gap:6px}

.dl-grid{padding:0 24px 80px;max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);padding:32px 24px;text-align:center;transition:var(--trans);box-shadow:var(--shadow);position:relative}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(230,57,42,0.2)}
.dl-tag{display:inline-block;padding:4px 12px;border-radius:20px;font-size:0.72rem;font-weight:700;color:var(--p);background:rgba(230,57,42,0.08);border:1px solid rgba(230,57,42,0.15);margin-bottom:16px}
.dl-card h3{font-size:1.3rem;font-weight:700;margin-bottom:10px}
.dl-card .dl-info{font-size:0.85rem;color:var(--t2);line-height:1.65;margin-bottom:16px;min-height:85px}
.dl-card .dl-size{display:block;font-size:0.78rem;color:var(--t3);margin-bottom:20px}

.dl-tips{max-width:760px;margin:0 auto 80px;padding:0 24px}
.tp{display:flex;gap:20px;align-items:flex-start;margin-bottom:24px;padding:24px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);transition:var(--trans);box-shadow:var(--shadow)}
.tp:hover{border-color:rgba(230,57,42,0.2)}
.tp-num{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--p),var(--s));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem}
.tp strong{display:block;font-size:1rem;color:var(--t1);margin-bottom:6px}
.tp p{font-size:0.88rem;color:var(--t2);line-height:1.7}

/* 规格表 */
.specs-tbl{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);overflow:hidden;box-shadow:var(--shadow)}
.sr{display:flex;padding:16px 24px;border-bottom:1px solid var(--border);align-items:flex-start;gap:16px}
.sr:last-child{border-bottom:none}
.sl{flex-shrink:0;width:110px;font-size:0.85rem;font-weight:600;color:var(--p)}
.sv{font-size:0.88rem;color:var(--t2);line-height:1.6}

/* ===== 404 ===== */
.err-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px 24px}
.err-card{text-align:center;max-width:500px}
.err-num{font-size:8rem;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--p),var(--s),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px;letter-spacing:-0.05em}
.err-card h1{font-size:1.6rem;font-weight:700;margin-bottom:12px}
.err-card p{color:var(--t2);font-size:0.95rem;line-height:1.65;margin-bottom:28px}
.err-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-text .desc{margin-left:auto;margin-right:auto}
  .hero-btns{justify-content:center}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .role-row,.dl-grid{grid-template-columns:repeat(2,1fr)}
  .trust-row{grid-template-columns:repeat(2,1fr)}
  .hl-inner{grid-template-columns:repeat(2,1fr);height:auto;padding:20px 24px;gap:16px}
  .hi:not(:last-child)::after{display:none}
}
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(254,249,242,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:24px;gap:18px;border-bottom:1px solid var(--border)}
  .nav-menu.open{display:flex}
  .nav-toggle{display:block}
  .hero-text h1{font-size:2rem}
  .hero{padding:40px 24px 60px}
  .sec{padding:60px 16px}
  .sec-head h2{font-size:1.6rem}
  .feat-grid{grid-template-columns:1fr}
  .role-row,.dl-grid{grid-template-columns:1fr}
  .trust-row{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .chat-badge{position:relative;bottom:auto;left:auto;transform:none;margin:20px auto 0;max-width:260px}
  .dl-hero h1{font-size:2rem}
  .dl-meta{flex-direction:column;align-items:center;gap:8px}
  .cta-box{padding:40px 20px}
  .cta-box h2{font-size:1.6rem}
  .err-num{font-size:5rem}
  .hl-inner{grid-template-columns:1fr 1fr}
}