/* =========================================================
   AI 智能 SEO 助理 产品介绍页
   配色：科技蓝 #0066FF + 青 #00C2D6（蓝青科技风，无紫）
   ========================================================= */
:root{
  --seo-blue:#0066FF;
  --seo-blue-2:#3388FF;
  --seo-cyan:#00C2D6;
  --seo-cyan-2:#22D3EE;
  --seo-ink:#0A1326;
  --seo-text:#16203A;
  --seo-muted:#586074;
  --seo-grad:linear-gradient(135deg,var(--seo-blue) 0%,var(--seo-cyan) 100%);
  --seo-grad-soft:linear-gradient(135deg,rgba(0,102,255,.08),rgba(0,194,214,.10));
  --seo-r:20px;
  --seo-r-sm:14px;
}

/* ---------- 通用 section ---------- */
.section{padding:90px 0;position:relative}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.seo-sec-head{text-align:center;max-width:760px;margin:0 auto 54px}
.seo-sec-head__k{display:inline-block;font-size:12px;letter-spacing:3px;font-weight:700;color:var(--seo-cyan);margin-bottom:14px}
.seo-sec-head h2{font-size:clamp(26px,3.2vw,38px);color:var(--seo-ink);font-weight:800;letter-spacing:-.5px}
.seo-sec-head p{margin-top:16px;font-size:16px;line-height:1.8;color:var(--seo-muted)}

/* ---------- Hero ---------- */
.seo-hero{position:relative;overflow:hidden;padding:120px 0 96px;background:
  radial-gradient(680px 520px at 85% 15%,rgba(0,194,214,.16),transparent 60%),
  radial-gradient(620px 520px at 10% 8%,rgba(0,102,255,.18),transparent 60%),
  linear-gradient(180deg,#EAF2FF 0%,#EAFBFE 100%);}
.seo-hero__bg{position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(0,102,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,194,214,.05) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(circle at 60% 30%,#000,transparent 80%);
          mask-image:radial-gradient(circle at 60% 30%,#000,transparent 80%);}
.seo-hero__inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.seo-tag{display:inline-block;padding:7px 16px;border-radius:999px;
  background:rgba(0,102,255,.10);color:var(--seo-blue);font-weight:700;font-size:13px;letter-spacing:.5px;margin-bottom:22px}
.seo-hero__text h1{font-size:clamp(34px,4.4vw,56px);line-height:1.12;color:var(--seo-ink);font-weight:800;letter-spacing:-.5px}
.seo-hero__text h1 span{display:block;font-size:.52em;margin-top:10px;background:var(--seo-grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700}
.seo-hero__lead{margin-top:22px;font-size:17px;line-height:1.85;color:var(--seo-muted);max-width:600px}
.seo-hero__btns{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.seo-btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border-radius:999px;font-weight:700;font-size:15px;transition:.25s;cursor:pointer}
.seo-btn--primary{background:var(--seo-grad);color:#fff;box-shadow:0 14px 30px -10px rgba(0,120,200,.5)}
.seo-btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 38px -12px rgba(0,120,200,.6)}
.seo-btn--ghost{background:rgba(255,255,255,.7);color:var(--seo-ink);border:1px solid rgba(0,102,255,.3)}
.seo-btn--ghost:hover{background:#fff;border-color:var(--seo-blue)}
.seo-hero__stats{display:flex;gap:30px;margin-top:40px;flex-wrap:wrap}
.seo-hero__stats li{list-style:none}
.seo-hero__stats b{display:block;font-size:26px;color:var(--seo-blue);font-weight:800;line-height:1.1}
.seo-hero__stats span{font-size:13px;color:var(--seo-muted)}

/* Hero 视觉：软件界面 + 浮动卡片 */
.seo-hero__art{position:relative;height:420px}
.seo-hero__screen{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:300px;background:#0E1726;border-radius:18px;
  box-shadow:0 30px 60px -20px rgba(0,60,120,.5);overflow:hidden;z-index:1}
.seo-screen__bar{display:flex;gap:6px;padding:12px 14px;background:#16213a}
.seo-screen__bar span{width:10px;height:10px;border-radius:50%;background:#2c3a5e}
.seo-screen__bar span:first-child{background:#ff5f57}
.seo-screen__bar span:nth-child(2){background:#febc2e}
.seo-screen__bar span:nth-child(3){background:#28c840}
.seo-screen__body{padding:16px}
.seo-screen__row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.seo-screen__plat{color:#cdd9ef;font-size:14px;font-weight:600}
.seo-screen__ok{color:#22D3EE;font-size:12px;font-weight:700}
.seo-screen__ai{margin-top:12px;font-size:12px;color:#8aa0c8;background:rgba(34,211,238,.08);padding:8px 12px;border-radius:10px;text-align:center}
.seo-float{position:absolute;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.9);border-radius:14px;padding:10px 14px;font-weight:700;font-size:13px;color:var(--seo-ink);
  box-shadow:0 18px 40px -18px rgba(0,60,120,.4);animation:seo-float 6s ease-in-out infinite;z-index:2}
.seo-float--ai{left:0;top:50px}
.seo-float--cms{right:0;top:20px;animation-delay:1.5s}
.seo-float--push{left:30px;bottom:24px;animation-delay:3s}
.seo-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px;vertical-align:middle}
.seo-dot--ai{background:var(--seo-blue)}
.seo-dot--cms{background:var(--seo-cyan)}
.seo-dot--push{background:#16B364}
@keyframes seo-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ---------- 全流程 ---------- */
.seo-flow{background:#fff}
.seo-flow__list{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.seo-flow__step{background:var(--seo-grad-soft);border-radius:var(--seo-r);padding:28px 22px;text-align:center;position:relative;transition:.3s}
.seo-flow__step:hover{transform:translateY(-6px);box-shadow:0 18px 40px -18px rgba(0,102,255,.35)}
.seo-flow__num{font-size:30px;font-weight:800;background:var(--seo-grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:10px}
.seo-flow__step h3{font-size:18px;color:var(--seo-ink);font-weight:700;margin-bottom:8px}
.seo-flow__step p{font-size:14px;line-height:1.7;color:var(--seo-muted)}

/* ---------- 功能详解 ---------- */
.seo-feat{background:linear-gradient(180deg,#F4F9FF 0%,#F0FBFE 100%)}
.seo-feat__block{margin-bottom:48px}
.seo-feat__title{font-size:20px;color:var(--seo-ink);font-weight:700;margin-bottom:22px;padding-left:14px;border-left:4px solid var(--seo-blue)}
.seo-feat__title span{color:var(--seo-blue)}
.seo-feat__list{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.seo-chip{background:#fff;border:1px solid rgba(0,102,255,.10);border-radius:var(--seo-r-sm);padding:16px 18px;font-size:14px;color:var(--seo-text);line-height:1.6;box-shadow:0 4px 14px -8px rgba(0,60,120,.15);transition:.25s}
.seo-chip:hover{border-color:var(--seo-cyan);transform:translateY(-3px)}
.seo-chip b{display:block;color:var(--seo-blue);font-weight:700;margin-bottom:4px;font-size:15px}

/* ---------- CMS 兼容（单卡片） ---------- */
.seo-cms{background:#fff}
.seo-cms__card{background:var(--seo-grad-soft);border-radius:var(--seo-r);padding:40px;position:relative;overflow:hidden}
.seo-cms__count{display:flex;align-items:baseline;gap:14px;margin-bottom:24px}
.seo-cms__count b{font-size:46px;font-weight:800;background:var(--seo-grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.seo-cms__count span{font-size:16px;color:var(--seo-muted);font-weight:600}
.seo-cms__tags{display:flex;flex-wrap:wrap;gap:12px}
.seo-cms__tags span{background:#fff;border:1px solid rgba(0,102,255,.14);border-radius:999px;padding:10px 18px;font-size:14px;font-weight:600;color:var(--seo-text);box-shadow:0 4px 14px -10px rgba(0,60,120,.3);transition:.25s}
.seo-cms__tags span:hover{border-color:var(--seo-cyan);transform:translateY(-3px);color:var(--seo-blue)}
.seo-cms__note{margin-top:24px;font-size:14px;color:var(--seo-muted);text-align:center}

/* ---------- 核心优势 ---------- */
.seo-adv{background:linear-gradient(180deg,#F0FBFE 0%,#F4F9FF 100%)}
.seo-adv__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.seo-adv__card{background:var(--seo-grad-soft);border-radius:var(--seo-r);padding:28px;transition:.3s}
.seo-adv__card:hover{transform:translateY(-6px);box-shadow:0 18px 40px -18px rgba(0,102,255,.3)}
.seo-adv__ic{width:46px;height:46px;border-radius:12px;background:var(--seo-grad);display:grid;place-items:center;margin-bottom:16px}
.seo-adv__ic svg{width:24px;height:24px;color:#fff}
.seo-adv__card h3{font-size:18px;color:var(--seo-ink);font-weight:700;margin-bottom:8px}
.seo-adv__card p{font-size:14px;line-height:1.7;color:var(--seo-muted)}

/* ---------- 场景 ---------- */
.seo-scene{background:#fff}
.seo-scene__row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.seo-scene__card{background:var(--seo-grad-soft);border-radius:var(--seo-r);padding:28px 24px;box-shadow:0 10px 30px -16px rgba(0,60,120,.2);transition:.3s}
.seo-scene__card:hover{transform:translateY(-6px);box-shadow:0 20px 44px -18px rgba(0,102,255,.3)}
.seo-scene__card h3{font-size:17px;color:var(--seo-ink);font-weight:700;margin-bottom:10px}
.seo-scene__card p{font-size:14px;line-height:1.7;color:var(--seo-muted)}

/* ---------- CTA（真通栏，与 tid=15 一致：直接嵌在上一区块底部铺满整屏） ---------- */
.seo-cta{background:transparent;padding:0 !important;margin-top:-70px;margin-bottom:30px}
.seo-cta__box{position:relative;text-align:center;padding:28px 24px;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,var(--seo-blue) 0%,var(--seo-cyan) 100%)}
.seo-cta__box h2{font-size:clamp(26px,3vw,38px);font-weight:800}
.seo-cta__box p{margin-top:14px;font-size:16px;opacity:.92}
.seo-cta__btns{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.seo-cta__btns .seo-btn--primary{background:#fff;color:var(--seo-blue)}
.seo-cta__btns .seo-btn--ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}

/* ---------- 动画可见性兜底（不依赖 JS 滚动动画） ---------- */
.seo-feat__block .seo-chip,
.seo-flow__step,
.seo-cms__card,
.seo-adv__card,
.seo-scene__card,
.seo-cta__box{opacity:1!important;visibility:visible!important;transform:none!important}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .seo-hero__inner{grid-template-columns:1fr;gap:32px}
  .seo-hero__art{height:360px;margin-top:10px}
  .seo-flow__list{grid-template-columns:repeat(2,1fr)}
  .seo-feat__list{grid-template-columns:repeat(2,1fr)}
  .seo-adv__grid{grid-template-columns:repeat(2,1fr)}
  .seo-scene__row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .section{padding:64px 0}
  .seo-flow__list,.seo-feat__list,.seo-adv__grid,.seo-scene__row{grid-template-columns:1fr}
  .seo-hero__stats{gap:18px}
}