/* ==========================================================
   寻Ai广告 首页 · 2026 大气版（仅 index.html 引用）
   原则：全部用现有主题变量，四套配色切换时自动跟随
   ========================================================== */

/* ---------- 区块标题加大 ---------- */
section.blk h2{font-size:37px;letter-spacing:-1.1px;line-height:1.28}
section.blk .sec-desc{font-size:15.5px;line-height:1.75}

/* ---------- 导航：加高、品牌名加大 ---------- */
.nav{height:76px;gap:34px}
.logo{font-size:20px;gap:11px;letter-spacing:-.4px}
.logo svg{width:36px;height:36px}
.nav-links a{font-size:14.5px}
.nav-cta .btn{padding:11px 22px;font-size:14px;border-radius:9px;font-weight:650}

/* ---------- 大按钮 ---------- */
.btn-xl{padding:18px 34px;font-size:17px;border-radius:13px;font-weight:650;gap:9px}
.btn-p.btn-xl{box-shadow:0 12px 28px -12px rgba(59,108,245,.62),0 2px 6px rgba(59,108,245,.16)}
.btn-p.btn-xl:hover{transform:translateY(-2px);box-shadow:0 18px 38px -14px rgba(59,108,245,.7)}
.btn-xl .ar{transition:transform .2s}
.btn-xl:hover .ar{transform:translateX(5px)}

/* ---------- Hero：左右分栏 ---------- */
.hero{padding:0;overflow:hidden}
.hero::before{
  top:-320px;width:1160px;height:780px;
  background:
    radial-gradient(ellipse 55% 55% at 26% 42%,rgba(59,108,245,.17),transparent 70%),
    radial-gradient(ellipse 50% 50% at 76% 28%,rgba(124,77,255,.15),transparent 70%),
    radial-gradient(ellipse 45% 45% at 56% 66%,rgba(10,147,172,.09),transparent 72%);
}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;padding-top:74px;padding-bottom:62px}
h1{font-size:60px;line-height:1.13;letter-spacing:-2.6px;font-weight:800;margin-bottom:22px}
h1 em{
  background:linear-gradient(120deg,#3b6cf5 0%,#7c4dff 46%,#0a93ac 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{font-size:18px;line-height:1.75;color:var(--dim);max-width:520px;margin-bottom:34px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.hero-trust{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--dim2)}
.hero-trust span{display:flex;align-items:center;gap:6px}
.hero-trust b{color:var(--green);font-weight:800;font-size:13px}

/* ---------- Hero 右侧：AI 对话演示 ---------- */
.hero-visual{position:relative}
.ai-win{
  position:relative;border-radius:18px;border:1px solid var(--line);background:var(--panel);
  box-shadow:0 34px 76px -32px rgba(16,24,40,.30),0 4px 14px rgba(16,24,40,.06);
  overflow:hidden;
}
.ai-head{display:flex;align-items:center;gap:10px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--panel2)}
.ai-dots{display:flex;gap:5px}
.ai-dots i{width:8px;height:8px;border-radius:50%;background:var(--line2);display:block}
.ai-dots i:nth-child(1){background:#ff5f57}
.ai-dots i:nth-child(2){background:#febc2e}
.ai-dots i:nth-child(3){background:#28c840}
.ai-model{margin-left:auto;font-size:11.5px;color:var(--dim2);display:flex;align-items:center;gap:6px;font-weight:600}
.ai-model .mdot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 9px var(--green)}
.ai-body{padding:16px 16px 18px}

.ai-q{
  margin-left:auto;max-width:84%;width:fit-content;
  background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;
  padding:10px 14px;border-radius:14px 14px 4px 14px;
  font-size:13.5px;line-height:1.55;font-weight:500;
}
.ai-q span{display:block;opacity:.82;font-size:12px;margin-top:2px}

.ai-think{display:flex;align-items:center;gap:7px;margin:14px 0 10px;font-size:11.5px;color:var(--dim2)}
.ai-think i{width:5px;height:5px;border-radius:50%;background:var(--blue);opacity:.4;animation:aiblink 1.2s infinite}
.ai-think i:nth-child(2){animation-delay:.2s}
.ai-think i:nth-child(3){animation-delay:.4s;margin-right:2px}
@keyframes aiblink{0%,100%{opacity:.25}50%{opacity:1}}

.ai-a{font-size:13px;color:var(--body-txt);line-height:1.7}
.ai-a > p{margin-bottom:11px;font-size:13px}
.ai-item{display:flex;gap:10px;align-items:flex-start;padding:9px 11px;border-radius:10px;background:var(--panel2);border:1px solid var(--line);margin-bottom:7px}
.ai-item .rk{flex:none;width:18px;height:18px;border-radius:5px;background:var(--line2);color:var(--strong);font-size:11px;font-weight:800;display:grid;place-items:center;margin-top:2px}
.ai-item b{font-size:13px;color:var(--strong);display:block;margin-bottom:1px}
.ai-item em{font-style:normal;font-size:11.5px;color:var(--dim2);display:block;line-height:1.5}
.ai-item.top{background:linear-gradient(135deg,rgba(59,108,245,.12),rgba(124,77,255,.08));border-color:rgba(59,108,245,.38)}
.ai-item.top .rk{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff}
.ai-item.top b{color:var(--strong)}

.ai-hit{
  display:flex;align-items:center;gap:7px;margin-top:11px;padding:9px 12px;border-radius:9px;
  background:rgba(15,158,110,.11);border:1px solid rgba(15,158,110,.32);
  font-size:12px;font-weight:700;color:var(--green);
}

/* 浮动角标 */
.fc{
  position:absolute;background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:9px 13px;box-shadow:0 12px 30px -12px rgba(16,24,40,.26);
  display:flex;flex-direction:column;gap:1px;
}
.fc span{font-size:10.5px;color:var(--dim2);font-weight:600}
.fc b{font-size:17px;font-weight:800;color:var(--strong);letter-spacing:-.5px}
.fc-a{top:44px;left:-34px;z-index:5;animation:fcfloat 4.2s ease-in-out infinite}
.fc-b{top:16px;right:-78px;z-index:5;animation:fcfloat 4.2s ease-in-out infinite .8s}
@keyframes fcfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}

/* ---------- 数据条：大数字横排 ---------- */
.statbar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--panel);border:1px solid var(--line);border-radius:18px;
  padding:30px 8px;box-shadow:var(--card-shadow);margin:0;
}
.statbar > div{text-align:center;border-right:1px solid var(--line)}
.statbar > div:last-child{border-right:none}
.statbar b{
  display:block;font-size:44px;font-weight:800;letter-spacing:-2.2px;line-height:1.05;
  background:linear-gradient(135deg,var(--blue),var(--purple) 70%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  font-variant-numeric:tabular-nums;
}
.statbar b small{font-size:18px;letter-spacing:-.5px}
.statbar span{display:block;font-size:12.5px;color:var(--dim);margin-top:7px;font-weight:500}

/* ---------- AI 平台墙 ---------- */
.blk-soft{background:var(--bg2)}
.plat-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-top:32px}
.plat{
  display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center;
  padding:22px 8px 18px;background:var(--panel);border:1px solid var(--line);border-radius:14px;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.plat:hover{transform:translateY(-4px);box-shadow:0 14px 30px -14px rgba(16,24,40,.24);border-color:var(--line2)}
.plogo{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-size:19px;font-weight:800;color:#fff;letter-spacing:-.5px;
  background:var(--c);box-shadow:0 6px 16px -8px var(--c);
}
.plat b{font-size:13px;color:var(--strong);font-weight:700;letter-spacing:-.2px}
.plat i{font-style:normal;font-size:11px;color:var(--dim2);line-height:1.4}

/* ---------- 流程：四步卡片 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-top:34px}
.fstep{
  position:relative;padding:26px 20px 22px;background:var(--panel);
  border:1px solid var(--line);border-radius:15px;transition:transform .2s,border-color .2s,box-shadow .2s;
}
.fstep:hover{transform:translateY(-3px);border-color:rgba(59,108,245,.42);box-shadow:0 16px 34px -18px rgba(59,108,245,.34)}
.fstep .sn{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.14em;
  color:var(--blue);margin-bottom:11px;
}
.fstep h3{font-size:16.5px;font-weight:750;color:var(--strong);margin-bottom:7px;letter-spacing:-.3px}
.fstep .tm{font-size:11.5px;color:var(--dim2);font-weight:600;margin-bottom:12px}
.fstep p{font-size:12.8px;color:var(--dim);line-height:1.68;margin:0}
.fstep .out{
  margin-top:13px;padding-top:12px;border-top:1px dashed var(--line);
  font-size:11.8px;color:var(--dim2);line-height:1.6;
}
.fstep .out b{color:var(--green);font-weight:700}

/* ---------- 成效看板 ---------- */
.board{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:center;margin-top:32px}
.board-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--card-shadow)}
.bc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.bc-head b{font-size:14px;color:var(--strong);font-weight:700}
.bc-head span{font-size:11.5px;color:var(--dim2)}
.bars{display:flex;align-items:flex-end;gap:14px;height:150px;padding-top:8px}
.bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:7px;height:100%;justify-content:flex-end}
.bar i{
  display:block;width:100%;border-radius:6px 6px 3px 3px;
  background:linear-gradient(180deg,var(--blue),rgba(124,77,255,.72));
  transition:height .6s;
}
.bar.last i{background:linear-gradient(180deg,#0f9e6e,#0a7a58)}
.bar em{font-style:normal;font-size:10.5px;color:var(--dim2);white-space:nowrap}
.bar u{text-decoration:none;font-size:11.5px;font-weight:800;color:var(--strong)}

/* ---------- 响应式 ---------- */
@media(max-width:1080px){
  .plat-grid{grid-template-columns:repeat(4,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .board{grid-template-columns:1fr}
}
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:44px;padding-top:52px;padding-bottom:52px}
  h1{font-size:44px;letter-spacing:-1.6px}
  .hero-sub{max-width:100%}
  .hero-visual{max-width:580px;width:100%;margin:0 auto}
  .fc{display:none}
}
@media(max-width:640px){
  .nav{height:66px;gap:16px}
  .logo{font-size:18px}
  .logo svg{width:32px;height:32px}
  h1{font-size:33px;letter-spacing:-1px}
  .hero-sub{font-size:15.5px}
  .hero-cta{flex-direction:column;gap:11px}
  .btn-xl{width:100%;padding:16px 24px;font-size:16px}
  .statbar{grid-template-columns:1fr 1fr;padding:8px;gap:1px;background:var(--line)}
  .statbar > div{border-right:none;padding:18px 6px;background:var(--panel);border-radius:10px}
  .statbar b{font-size:34px}
  .plat-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:1fr}
  .ai-q{max-width:92%}
  .fc{display:none}
}