/* 基础色：清新蓝绿系 */
:root{
  --brand:#1fb6a6; /* 主色 */
  --brand-2:#67d5c5; /* 渐变辅助 */
  --ink:#0f172a; /* 文字深色 */
  --muted:#475569; /* 次要文字 */
  --bg:#f7fbfb; /* 背景 */
  --card:#ffffff; /* 卡片 */
  --line:#e2e8f0; /* 分隔 */
  --accent:#3b82f6; /* 强调 */
  --shadow:0 10px 30px rgba(31,182,166,.15);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1200px,92%);margin-inline:auto}

/* 可访问性 */
.skip-link{position:absolute;left:-999px;top:auto}
.skip-link:focus{left:12px;top:12px;z-index:1000;background:#fff;padding:.5rem .75rem;border-radius:6px;box-shadow:var(--shadow)}

/* 头部导航 */
.site-header{position:sticky;top:0;background:#ffffffba;backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line);z-index:50}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0}
.logo{height:36px;width:auto}
.brand{display:flex;align-items:center;gap:10px}
.brand-text{font-weight:600;color:var(--ink)}
.site-nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0}
.site-nav a{color:var(--ink)}
.site-nav a:hover{color:var(--brand)}
.chat-btn{display:inline-flex;align-items:center;padding:.55rem .9rem;border:1px solid var(--brand);color:#fff;background:var(--brand);border-radius:999px;box-shadow:var(--shadow)}
.chat-btn:hover{filter:brightness(.95);text-decoration:none}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:transparent;border:0}
.nav-toggle .bar{width:24px;height:2px;background:var(--ink)}

/* Banner */
.banner{position:relative;isolation:isolate}
.banner-bg{position:absolute;inset:0;background:linear-gradient(180deg,rgba(31,182,166,.25),rgba(255,255,255,0)),url('../img/banner.jpg') center/cover no-repeat;z-index:-1}
.banner-inner{padding:84px 0 72px;min-height:420px;display:grid;align-items:center;gap:16px}
.banner h1{font-size:60px;line-height:1.2;margin:0}
.banner .subtitle{color:var(--muted);margin:0;font-size:20px;}
.cta-group{display:flex;gap:12px;flex-wrap:wrap}
.banner-left{display:grid;gap:30px;max-width:clamp(360px, 42vw, 560px);justify-self:start}
.banner-right{display:flex;justify-content:flex-start;align-items:center;justify-self:start}
.banner-right .btn{margin-left:0}
.btn-lg{padding:1rem 1.5rem;font-size:1.05rem;border-radius:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.1rem;border-radius:10px;border:1px solid transparent;font-weight:600;transition:transform .2s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow);text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-link{padding:0;border:0;background:none;color:var(--accent)}
.kws{color:var(--muted);font-size:20px;}

/* 通用区块 */
.section{padding:64px 0}
.section h2{font-size:28px;margin:0 0 18px}
.section p{color:var(--muted)}

/* 卡片与网格 */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.app-item{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow)}

/* 公司实力 */
.strength-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:0;padding:0}
.strength-list li{list-style:none;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;box-shadow:var(--shadow)}

/* 新闻 */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.news-item{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow)}
.news-item h3{margin:0 0 8px}
.news-item time{font-size:.85rem;color:var(--muted)}

/* Product 区块（新设计） */
.kicker{font-size:.85rem;color:var(--brand);text-transform:uppercase;letter-spacing:.08em;margin:0 0 8px}
.section-intro{margin:0 0 18px}

.product-hero{position:relative;background:linear-gradient(180deg, rgba(31,182,166,.06), rgba(255,255,255,0));border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow);overflow:hidden}
.media-strip{display:flex;gap:16px;align-items:stretch}
.media-card{flex:1;background:#0b1220;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid rgba(226,232,240,.7)}
.media-card img{width:100%;height:100%;object-fit:cover}
.media-badge{position:absolute;right:18px;bottom:18px;display:inline-flex;align-items:center;gap:8px;padding:.6rem .85rem;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:var(--shadow);font-weight:600}
.badge-icon{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:999px;background:rgba(255,255,255,.2)}

.product-cards{margin-top:18px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:16px;transition:transform .2s ease, box-shadow .2s ease}
.pcard:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(31,182,166,.2)}
.pcard h3{margin:6px 0 8px}
.pcard p{margin:0;color:var(--muted)}
.pcard-icon{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,rgba(31,182,166,.15),rgba(103,213,197,.25));display:grid;place-items:center;font-size:20px}

.product-cta{display:flex;gap:12px;justify-content:center;margin-top:20px}

/* Application 区块（团队卡片风格） */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:12px}
.member-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:transform .2s ease, box-shadow .2s ease}
.member-card:hover{transform:translateY(-3px);box-shadow:0 16px 44px rgba(31,182,166,.18)}
.member-photo{aspect-ratio:4/3;background:#0b1220}
.member-photo img{width:100%;height:100%;object-fit:cover}
.member-meta{background:#f8fafc;border-top:1px solid var(--line);padding:14px 16px}
.member-meta h3{margin:0 0 4px;font-size:1.05rem}
.member-meta .role{margin:0;color:var(--muted);font-size:.92rem}
.member-action{position:absolute;left:50%;bottom:56px;transform:translate(-50%,50%);width:44px;height:44px;border-radius:999px;border:0;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:var(--shadow);cursor:pointer}
.member-action:hover{filter:brightness(.95)}

/* Strength 区块（动态背景统计） */
.section-strength{position:relative;isolation:isolate;background:linear-gradient(180deg, var(--bg), #eef9f7);color:var(--ink);overflow:hidden}
.section-strength::before, .section-strength::after{content:"";position:absolute;inset:-15%;z-index:-2;pointer-events:none}
/* 浅色品牌渐变云层（明显移动） */
.section-strength::before{background:
  radial-gradient(60% 40% at 20% 20%, rgba(31,182,166,.25), rgba(255,255,255,0) 65%),
  radial-gradient(55% 40% at 85% 70%, rgba(103,213,197,.22), rgba(255,255,255,0) 62%),
  linear-gradient(180deg, var(--bg), #eef9f7);
  animation: bg-shift 14s ease-in-out infinite alternate;
}
/* 轻量粒子与线性噪声（更可见） */
.section-strength::after{background-image:
  radial-gradient(circle at 12% 25%, rgba(31,182,166,.12) 0 1px, transparent 1px),
  radial-gradient(circle at 78% 80%, rgba(59,130,246,.10) 0 1px, transparent 1px);
  background-size: 220px 220px, 300px 300px;
  animation: dots-move 16s linear infinite;
  opacity:.8;
}

@keyframes bg-shift{to{transform:translate3d(4%, -4%, 0) scale(1.06) rotate(.5deg)}}
@keyframes dots-move{to{transform:translate3d(-8%, -6%, 0)}}

.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:16px}
.stat{display:grid;justify-items:center;gap:8px;padding:18px 12px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.stat-blob{width:64px;height:64px;border-radius:20px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;box-shadow:var(--shadow);transform:translateY(0);animation: floaty 3.6s ease-in-out infinite}
.stat-blob span{font-size:28px}
.stat-num{font-size:28px;font-weight:800;letter-spacing:.5px;color:var(--ink)}
.stat-desc{margin:0;color:var(--muted)}

@keyframes floaty{50%{transform:translateY(-8px)}}

/* 联系与表单 */
.section-contact .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.qrcode{width:180px;height:auto;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow)}
.contact-form-grid{display:grid;gap:10px}
.contact-form-grid input, .contact-form-grid button{font-size:1rem}
.contact-form-grid input{height:42px;border-radius:10px;border:1px solid var(--line);padding:0 12px}
.contact-form-grid .form-tip{font-size:.9rem;color:var(--muted)}
.contact-form-grid .btn-primary{height:44px}
.required{color:#e11d48}

/* 页脚 */
.site-footer{background:#0b1220;color:#d1d5db}
.site-footer a{color:#9ec1ff}
.site-footer .container{padding:24px 0}

/* 动画与显隐 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width: 992px){
  .cards,.grid-3,.news-list,.product-cards,.team-grid{grid-template-columns:1fr 1fr}
  .banner-inner{gap:16px}
  .section-contact .contact-grid{grid-template-columns:1fr}
}
@media (max-width: 640px){
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;right:0;top:60px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding:10px}
  .banner-inner{padding:64px 0;grid-template-columns:1fr;gap:20px}
  .banner h1{font-size:32px}
  .cards,.grid-3,.news-list,.product-cards,.team-grid{grid-template-columns:1fr}
  .media-strip{flex-direction:column}
  .media-badge{position:static;margin-top:12px;justify-content:center}
  .banner-right{justify-content:flex-start}
}