/* ============================================================
   证书用途页 · 用途路径图 + 左右交替详解
   ============================================================ */

/* ---------- 首屏 ---------- */
.hero{position:relative;min-height:76vh;display:flex;align-items:center;overflow:hidden;background:var(--mix-bg)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-mask{position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.95) 8%,rgba(255,255,255,.8) 46%,rgba(234,244,252,.42) 78%,rgba(241,238,251,.32) 100%)}
.hero-inner{position:relative;z-index:2;padding:150px 0 130px}
.hero-kicker{display:inline-block;padding:8px 18px;border-radius:999px;background:rgba(255,255,255,.75);border:1px solid rgba(124,111,208,.28);color:var(--purple);font-weight:600;font-size:.9rem;letter-spacing:2px}
.hero-title{font-size:clamp(1.9rem,4.2vw,3.1rem);font-weight:800;line-height:1.3;margin:22px 0 18px;letter-spacing:.5px}
.hero-title em{font-style:normal;background:linear-gradient(120deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{max-width:620px;color:var(--ink-2);font-size:1.05rem;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;z-index:3}
.hero-wave svg{display:block;width:100%;height:70px}
.hero-line{opacity:0;animation:heroUp .85s cubic-bezier(.22,.9,.3,1) forwards}
.hero-line.d1{animation-delay:.15s}.hero-line.d2{animation-delay:.3s}.hero-line.d3{animation-delay:.45s}.hero-line.d4{animation-delay:.6s}
@keyframes heroUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.hero-line{opacity:1;animation:none}}

/* ---------- 路径图 ---------- */
.path{background:#fff;overflow:hidden}
.path::after{content:"";position:absolute;right:-140px;bottom:-120px;width:420px;height:420px;background:radial-gradient(circle,rgba(59,143,212,.12),transparent 70%);border-radius:50%}
.path-line{position:relative;display:flex;align-items:stretch;justify-content:space-between;gap:0;flex-wrap:nowrap}
.p-node{position:relative;flex:1;min-width:0;text-align:center;padding:0 8px}
.p-dot{display:flex;width:64px;height:64px;margin:0 auto 16px;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-style:normal;font-weight:800;font-size:1.3rem;box-shadow:var(--shadow-2);border:4px solid #fff;position:relative;z-index:2}
.p-node h3{font-size:1.05rem;font-weight:800;margin-bottom:8px}
.p-node p{font-size:.84rem;color:var(--ink-2);line-height:1.6}
.p-link{flex:0 0 36px;align-self:center;height:3px;margin-top:-46px;background:linear-gradient(90deg,var(--blue-2),var(--purple-2));border-radius:3px;position:relative}
.p-link::after{content:"";position:absolute;right:-2px;top:-4px;border:6px solid transparent;border-left-color:var(--purple-2)}

/* ---------- 左右交替详解 ---------- */
.uses{background:var(--mix-bg)}
.use-row{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center;margin-bottom:64px}
.use-row:last-child{margin-bottom:0}
.use-row.flip .use-media{order:2}
.use-media img{width:100%;height:auto;border-radius:var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);box-shadow:var(--shadow)}
.use-row.flip .use-media img{border-radius:var(--r-sm) var(--r-lg) var(--r-sm) var(--r-lg)}
.use-text h2{font-size:1.5rem;font-weight:800;margin:14px 0 16px;line-height:1.4}
.use-text p{color:var(--ink-2);margin-bottom:14px}
.use-text a{color:var(--blue);font-weight:600}
.use-text a:hover{color:var(--purple)}

/* ---------- FAQ ---------- */
.faq{background:#fff}
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--blue-bg);border:1px solid var(--line);border-radius:var(--r-md) var(--r-sm) var(--r-md) var(--r-sm);padding:20px 24px}
.faq-item:nth-child(even){background:var(--purple-bg)}
.faq-item summary{display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;font-weight:700;font-size:1.02rem;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .caret{transition:transform .25s;color:var(--ink-3)}
.faq-item[open] summary .caret{transform:rotate(180deg)}
.faq-item p{margin-top:12px;color:var(--ink-2);font-size:.95rem}
.faq-item a{color:var(--blue);font-weight:600}

/* ---------- 互链 ---------- */
.rel{background:var(--mix-bg)}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rel-card{display:flex;flex-direction:column;gap:4px;padding:22px;border:1px solid var(--line);border-radius:var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);background:#fff;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.rel-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-2)}
.rel-card b{font-size:1.05rem}
.rel-card span{font-size:.84rem;color:var(--ink-2)}
.rel-card.active-me{outline:2px solid var(--blue);outline-offset:2px}

/* ---------- 资讯 ---------- */
.news{background:#fff}
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.n-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-sm) var(--r-lg) var(--r-sm) var(--r-lg);overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.n-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-2)}
.n-thumb{overflow:hidden}
.n-thumb img{width:100%;height:180px;object-fit:cover;transition:transform .5s}
.n-card:hover .n-thumb img{transform:scale(1.06)}
.n-body{padding:16px;display:flex;flex-direction:column;gap:8px;flex:1}
.n-body h3{font-size:.98rem;font-weight:700;line-height:1.5}
.n-body p{color:var(--ink-2);font-size:.86rem;flex:1}
.n-body time{color:var(--ink-3);font-size:.78rem}
.news-more{text-align:center;margin-top:36px}

/* ---------- CTA ---------- */
.cta{background:var(--mix-bg)}
.cta-box{position:relative;overflow:hidden;text-align:center;background:#fff;border:1px solid var(--line);border-radius:36px 16px 36px 16px;padding:54px 30px;box-shadow:var(--shadow-2)}
.cta-bubble{position:absolute;border-radius:50%;filter:blur(8px)}
.cta-bubble.b1{width:260px;height:260px;left:-90px;top:-90px;background:radial-gradient(circle,rgba(59,143,212,.18),transparent 70%)}
.cta-bubble.b2{width:240px;height:240px;right:-80px;bottom:-80px;background:radial-gradient(circle,rgba(124,111,208,.18),transparent 70%)}
.cta-box h2{font-size:clamp(1.5rem,2.8vw,2.1rem);font-weight:800;margin-bottom:14px}
.cta-box h2 em{font-style:normal;background:linear-gradient(120deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.cta-box>p{color:var(--ink-2);max-width:560px;margin:0 auto 22px}
.cta-contact{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 30px;margin-bottom:26px}
.cta-line{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:1.05rem;color:var(--ink)}
.cta-line:hover{color:var(--blue)}
.cta-line .ico{color:var(--purple)}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}

/* ---------- 项目规模配置 ---------- */
.scale{background:#fff}
.scale-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:28px}
.scale-card{border:1px solid var(--line);border-radius:var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);padding:26px 24px;background:var(--blue-bg);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.scale-card.mid{background:var(--purple-bg)}
.scale-card.big{background:linear-gradient(160deg,var(--blue-bg),var(--purple-bg))}
.scale-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-2)}
.scale-card h3{font-size:1.05rem;font-weight:800;margin-bottom:10px;line-height:1.5}
.scale-desc{color:var(--ink-3);font-size:.86rem;margin-bottom:12px}
.scale-card ul{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.scale-card li{padding-left:16px;position:relative;color:var(--ink-2);font-size:.9rem;line-height:1.6}
.scale-card li::before{content:"";position:absolute;left:0;top:.55em;width:6px;height:6px;border-radius:50%;background:var(--blue)}
.scale-card.mid li::before{background:var(--purple)}
.scale-card>p{font-size:.88rem;color:var(--ink);background:#fff;border-radius:var(--r-sm);padding:10px 14px}
.scale-note{display:flex;gap:16px;align-items:flex-start;background:var(--mix-bg);border:1px solid var(--line);border-radius:var(--r-md);padding:22px 26px}
.scale-note svg{flex:0 0 auto;color:var(--purple);margin-top:3px}
.scale-note p{color:var(--ink-2);font-size:.93rem;line-height:1.8}
.scale-note b{color:var(--ink)}
.scale-note a{color:var(--blue);font-weight:600}

/* ---------- 用证误区 ---------- */
.myth{background:var(--mix-bg)}
.myth-list{display:flex;flex-direction:column;gap:16px}
.myth-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px 26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px}
.myth-wrong{font-size:1rem;font-weight:800;color:#c0504d}
.myth-wrong::before{content:"误区 · ";font-weight:700}
.myth-item p{font-size:.92rem;color:var(--ink-2);line-height:1.8}
.myth-note{margin-top:22px;color:var(--ink-2);font-size:.95rem;line-height:1.9;text-align:center;max-width:720px;margin-left:auto;margin-right:auto}
.myth-note a{color:var(--blue);font-weight:600}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .scale-grid{grid-template-columns:1fr}
  .path-line{flex-direction:column;gap:26px}
  .p-link{flex:none;width:3px;height:30px;margin:0 auto;background:linear-gradient(180deg,var(--blue-2),var(--purple-2))}
  .p-link::after{right:auto;top:auto;bottom:-2px;left:-4px;border:6px solid transparent;border-top-color:var(--purple-2)}
  .use-row{grid-template-columns:1fr;gap:24px}
  .use-row.flip .use-media{order:0}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767px){
  .hero-inner{padding:120px 0 100px}
  .rel-grid,.news-grid{grid-template-columns:1fr}
  .hero-wave svg{height:44px}
}