/* =========================================================
   吉成珍加客 · 设计系统 (Design Tokens)
   —— 使用 CSS 变量，可整体复用到其它平台/终端/框架
   —— 只需修改 :root 变量即可全局换肤
   ========================================================= */
:root {
  /* 品牌色 */
  --brand-900: #0b1e5b;
  --brand-800: #12308a;
  --brand-700: #1a45c4;
  --brand-600: #2456e6;
  --brand-500: #3b6ef5;
  --brand-400: #6a92f8;
  --brand-100: #e6efff;
  --brand-50:  #f2f7ff;

  /* 辅助/强调色（AI 科技感） */
  --accent-600: #7c3aed;
  --accent-500: #9333ea;
  --cyan-500:   #06b6d4;
  --teal-400:   #22d3ee;

  /* 功能色 */
  --success: #16a34a;
  --warning: #f59e0b;
  --danger:  #ef4444;

  /* 中性色 */
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-400: #94a3b8;
  --line:    #e2e8f0;
  --bg:      #ffffff;
  --bg-soft: #f6f8fc;
  --bg-soft2:#eef3fb;
  --white:   #ffffff;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #2456e6 0%, #7c3aed 100%);
  --grad-brand-soft: linear-gradient(135deg, #eaf1ff 0%, #f3ecff 100%);
  --grad-hero: radial-gradient(1200px 600px at 80% -10%, rgba(124,58,237,.18), transparent 60%),
               radial-gradient(1000px 500px at 0% 0%, rgba(36,86,230,.16), transparent 55%),
               linear-gradient(180deg, #0b1e5b 0%, #12308a 55%, #1a45c4 100%);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,.08);
  --shadow-lg: 0 18px 50px rgba(15,23,42,.14);
  --shadow-brand: 0 16px 40px rgba(36,86,230,.28);

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-full: 999px;

  /* 排版 */
  --font-sans: "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  --fs-hero: clamp(2rem, 5.2vw, 3.6rem);
  --fs-h2:   clamp(1.6rem, 3.4vw, 2.5rem);
  --fs-h3:   clamp(1.15rem, 2vw, 1.4rem);
  --fs-lead: clamp(1rem, 1.5vw, 1.2rem);
  --fs-body: 1rem;

  /* 布局 */
  --maxw: 1200px;
  --gap:  clamp(1rem, 2.5vw, 2rem);
  --sec-pad: clamp(3.5rem, 7vw, 6.5rem);
  --nav-h: 68px;
}

/* ============ Reset ============ */
*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1,h2,h3,h4 { color: var(--ink-900); line-height: 1.25; font-weight: 800; }

/* ============ 通用容器/工具 ============ */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }
.section { padding-block: var(--sec-pad); }
.section--soft { background: var(--bg-soft); }
.section--brand { background: var(--grad-brand-soft); }
.center { text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .82rem; font-weight: 700; letter-spacing: .08em;
  color: var(--brand-600); text-transform: uppercase;
  background: var(--brand-50); border: 1px solid var(--brand-100);
  padding: .38rem .85rem; border-radius: var(--r-full);
}
.section-title { font-size: var(--fs-h2); margin: 1rem 0 .75rem; }
.section-sub { font-size: var(--fs-lead); color: var(--ink-500); max-width: 720px; margin-inline: auto; }
.section-head { max-width: 760px; margin: 0 auto clamp(2rem,4vw,3.2rem); }
.text-grad {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.6rem; border-radius: var(--r-full);
  font-weight: 700; font-size: .98rem; white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s;
}
.btn--primary { background: var(--grad-brand); color: #fff; box-shadow: var(--shadow-brand); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 22px 46px rgba(36,86,230,.36); }
.btn--ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn--ghost:hover { background: rgba(255,255,255,.22); transform: translateY(-2px); }
.btn--light { background: #fff; color: var(--brand-700); box-shadow: var(--shadow-md); }
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--outline { background: #fff; color: var(--brand-700); border: 1.5px solid var(--brand-600); }
.btn--outline:hover { background: var(--brand-50); transform: translateY(-2px); }
.btn--lg { padding: 1.05rem 2.1rem; font-size: 1.05rem; }
.btn--block { width: 100%; }

/* ============ 顶部导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 100;
  display: flex; align-items: center;
  background: rgba(255,255,255,.72); backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent; transition: box-shadow .25s, border-color .25s, background .25s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); border-bottom-color: var(--line); background: rgba(255,255,255,.92); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 800; color: var(--ink-900); font-size: 1.18rem; white-space: nowrap; min-width: 0; }
.brand__logo {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; flex: none;
  background: var(--grad-brand); color: #fff; font-weight: 900; box-shadow: var(--shadow-brand);
  font-size: 1.05rem; letter-spacing: -1px;
}
.brand__name { font-size: 1.12rem; line-height: 1.15; letter-spacing: .01em; }
.brand__dot { font-size: .5em; font-weight: 400; margin: 0 .18em; opacity: .5; display: inline-block; transform: translateY(-.04em); }
.nav__menu { display: flex; align-items: center; gap: 1.5rem; }
.nav__link { font-weight: 600; color: var(--ink-700); font-size: .92rem; position: relative; transition: color .2s; padding: .35rem 0; white-space: nowrap; }
.nav__link:hover { color: var(--brand-600); }
.nav__link::after { content:""; position:absolute; left:0; right:0; bottom:0; height:2px; border-radius:2px;
  background: linear-gradient(90deg,var(--brand-500),var(--brand-600)); transform: scaleX(0); transform-origin:left; transition: transform .25s ease; }
.nav__link:hover::after, .nav__link:focus-visible::after { transform: scaleX(1); }
/* 招合作伙伴入口：在左侧菜单中以金色高亮，避免右侧按钮重复 */
.nav__link--partner { color: #ea7317; font-weight: 700; }
.nav__link--partner:hover { color: #d9650c; }
.nav__link--partner::after { background: linear-gradient(90deg,#f59e0b,#f97316); }
.nav__link--partner.is-active { color: #d9650c; }
.nav__link.is-active { color: var(--brand-600); }
.nav__link.is-active::after { transform: scaleX(1); }
.nav__actions { display: flex; align-items: center; gap: .8rem; }
.nav__toggle { display: none; width: 44px; height: 44px; border-radius: 10px; }
.nav__toggle span { display:block; width: 22px; height: 2px; background: var(--ink-900); margin: 4px auto; transition: .3s; border-radius:2px;}

/* ============ HERO ============ */
.hero { position: relative; padding-top: calc(var(--nav-h) + clamp(2.5rem,6vw,5rem)); padding-bottom: clamp(3rem,7vw,6rem);
  background: var(--grad-hero); color: #fff; overflow: hidden; }
.hero::after { content:""; position:absolute; left:0; right:0; bottom:-1px; height: 90px;
  background: linear-gradient(180deg, transparent, var(--bg)); pointer-events:none; }
.hero__grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem,4vw,3.5rem); align-items: center; }
.hero__badge { display:inline-flex; align-items:center; gap:.5rem; background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.25); padding: .4rem 1rem; border-radius: var(--r-full);
  font-size: .85rem; font-weight: 600; margin-bottom: 1.4rem; color:#dbe6ff;}
.hero h1 { color:#fff; font-size: var(--fs-hero); letter-spacing: -.5px; margin-bottom: 1.2rem; }
.hero h1 .hl { background: linear-gradient(120deg,#7dd3fc,#c4b5fd); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero__lead { font-size: var(--fs-lead); color: #d3ddf5; max-width: 560px; margin-bottom: 2rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2.2rem; }
.hero__stats { display: flex; gap: clamp(1.2rem,3vw,2.6rem); flex-wrap: wrap; }
.hero__stat b { display:block; font-size: clamp(1.5rem,3vw,2.1rem); color:#fff; font-weight:800; }
.hero__stat span { font-size:.85rem; color:#aebbe0; }

/* Hero 数据看板卡片 */
.dashboard {
  position: relative; background: rgba(255,255,255,.98); border-radius: var(--r-xl);
  padding: 1.4rem; box-shadow: var(--shadow-lg); color: var(--ink-700);
}
.dashboard__head { display:flex; align-items:center; justify-content:space-between; margin-bottom:1.1rem; }
.dashboard__title { font-weight:800; color: var(--ink-900); font-size:1.02rem; }
.dashboard__tabs { display:flex; gap:.4rem; }
.dashboard__tab { font-size:.72rem; padding:.25rem .6rem; border-radius: var(--r-full); background:var(--bg-soft); color:var(--ink-500); font-weight:600;}
.dashboard__tab.is-active { background: var(--brand-600); color:#fff; }
.kpi-row { display:grid; grid-template-columns: repeat(3,1fr); gap:.7rem; margin-bottom:1.1rem; }
.kpi { background: var(--bg-soft); border-radius: var(--r-md); padding: .8rem; }
.kpi span { font-size:.72rem; color:var(--ink-500); }
.kpi b { display:block; font-size:1.25rem; color:var(--ink-900); margin:.2rem 0; }
.kpi .up { font-size:.72rem; color: var(--success); font-weight:700; }
.chart { height: 130px; display:flex; align-items:flex-end; gap:.5rem; padding-top:.5rem; border-top:1px dashed var(--line);}
.chart .bar { flex:1; border-radius:6px 6px 0 0; background: var(--grad-brand); opacity:.9; animation: grow 1s ease both;}
@keyframes grow { from{ height:0; } }
.dashboard__float {
  position:absolute; right:-14px; top:-16px; background:#fff; border-radius:var(--r-md);
  box-shadow: var(--shadow-lg); padding:.6rem .9rem; display:flex; align-items:center; gap:.5rem; font-size:.8rem; font-weight:700; color:var(--ink-900);
}
.dashboard__float .dot { width:9px; height:9px; border-radius:50%; background: var(--success); box-shadow:0 0 0 4px rgba(22,163,74,.15);}

/* logos / trust bar */
.trustbar { background: var(--bg); border-bottom: 1px solid var(--line); }
.trustbar__inner { display:flex; align-items:center; justify-content:center; gap: clamp(1.5rem,5vw,4rem); flex-wrap:wrap; padding: 1.4rem 0; color: var(--ink-400); font-weight:700; font-size:.95rem;}

/* ============ 卡片网格通用 ============ */
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: clamp(1.4rem, 2.5vw, 2rem); box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--brand-100); }
.card__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--grad-brand-soft); color: var(--brand-600); margin-bottom: 1rem;
}
.card__icon svg { width: 26px; height: 26px; }
.card h3 { font-size: var(--fs-h3); margin-bottom: .6rem; }
.card p { color: var(--ink-500); font-size: .96rem; }
.card__link { display:inline-flex; align-items:center; gap:.35rem; margin-top:1rem; color:var(--brand-600); font-weight:700; font-size:.92rem;}
.card__link svg{ width:16px; height:16px; transition: transform .2s;}
.card:hover .card__link svg{ transform: translateX(4px);}

/* ============ 产品大卡片 ============ */
.product { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,4rem); align-items:center; }
.product + .product { margin-top: clamp(3rem,6vw,5rem); }

/* ===== 产品切换 Tab（顶部吸顶，快速切换两大核心产品） ===== */
.product-tabs{
  position: sticky; top: var(--nav-h, 70px); z-index: 40;
  display:flex; gap:.4rem; justify-content:center; flex-wrap:wrap;
  margin: 0 auto clamp(1.8rem,4vw,2.8rem); padding:.4rem;
  width: fit-content; max-width:100%;
  background: rgba(255,255,255,.82); backdrop-filter: blur(10px);
  border:1px solid var(--brand-100); border-radius: var(--r-full);
  box-shadow: var(--shadow-md);
}
.product-tab{
  appearance:none; cursor:pointer; font:inherit; font-weight:700; font-size:.95rem;
  color: var(--ink-500); padding:.7rem 1.35rem; border-radius: var(--r-full);
  background:transparent; border:0; transition: all .2s;
  display:inline-flex; align-items:center; gap:.45rem; white-space:nowrap;
}
.product-tab:hover{ color: var(--brand-700); background: var(--brand-50); }
.product-tab.is-active{
  color:#fff; box-shadow: var(--shadow-brand);
  background: linear-gradient(135deg, var(--brand-600), var(--brand-400));
}
.product-panel{ display:none; }
.product-panel.is-active{ display:grid; }
@media (max-width: 560px){
  .product-tabs{ width:100%; }
  .product-tab{ flex:1 1 auto; justify-content:center; padding:.7rem .8rem; font-size:.88rem; }
}

.product__media {
  border-radius: var(--r-xl); padding: clamp(1.5rem,3vw,2.5rem); position:relative; overflow:hidden;
  background: var(--grad-brand); box-shadow: var(--shadow-lg); min-height: 320px; display:grid; place-items:center;
}
.product__media--alt { background: linear-gradient(135deg,#0e7490 0%, #7c3aed 100%); }
.product__tag { display:inline-flex; align-items:center; gap:.4rem; font-size:.8rem; font-weight:700; color:var(--brand-600);
  background:var(--brand-50); border:1px solid var(--brand-100); padding:.35rem .85rem; border-radius:var(--r-full); margin-bottom:1rem;}
.product h3 { font-size: var(--fs-h2); margin-bottom: 1rem; }
.product__desc { color: var(--ink-500); font-size: var(--fs-lead); margin-bottom: 1.4rem; }
.feature-list { display:grid; gap:.85rem; margin-bottom: 1.8rem; }
.feature-list li { display:flex; gap:.7rem; align-items:flex-start; color: var(--ink-700); }
.feature-list .tick { flex:0 0 22px; width:22px; height:22px; border-radius:50%; background: var(--brand-50); color:var(--brand-600); display:grid; place-items:center; margin-top:2px;}
.feature-list .tick svg{ width:13px; height:13px; }
.feature-list li b { color: var(--ink-900); }

/* 玻璃拟态小卡（放在 media 里） */
.glass-mini { width:100%; display:grid; gap:.8rem; }
.glass-card { background: rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.24); border-radius: var(--r-md);
  padding: 1rem 1.2rem; color:#fff; backdrop-filter: blur(6px);}
.glass-card b { font-size:1.4rem; display:block; }
.glass-card span { font-size:.82rem; color:rgba(255,255,255,.82);}
.glass-row { display:grid; grid-template-columns: repeat(2,1fr); gap:.8rem;}

/* ============ 服务包 pricing ============ */
.plan { background:#fff; border:1px solid var(--line); border-radius: var(--r-lg); padding: 2rem; position:relative; transition: transform .25s, box-shadow .25s;}
.plan:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.plan--featured { border-color: var(--brand-600); box-shadow: var(--shadow-brand); }
.plan--featured::before { content:"推荐"; position:absolute; top:-13px; left:50%; transform:translateX(-50%);
  background: var(--grad-brand); color:#fff; font-size:.75rem; font-weight:700; padding:.3rem 1rem; border-radius:var(--r-full);}
.plan h3 { font-size:1.3rem; margin-bottom:.4rem;}
.plan__price { font-size:2.2rem; font-weight:800; color:var(--ink-900); margin:.6rem 0;}
.plan__price small{ font-size:.9rem; color:var(--ink-400); font-weight:600;}
.plan__price .from{ font-size:.85rem; color:var(--ink-400); font-weight:600; display:block;}
.plan ul { display:grid; gap:.7rem; margin:1.3rem 0 1.8rem;}
.plan li { display:flex; gap:.6rem; align-items:flex-start; font-size:.94rem; color:var(--ink-700);}
.plan li svg{ flex:0 0 18px; width:18px; height:18px; color:var(--success); margin-top:3px;}

/* ============ 步骤流程 ============ */
.steps { counter-reset: step; display:grid; grid-template-columns: repeat(4,1fr); gap: var(--gap);}
.step { position:relative; padding-top: 1rem;}
.step__num { width:46px; height:46px; border-radius:14px; background: var(--grad-brand); color:#fff; display:grid; place-items:center; font-weight:800; font-size:1.2rem; margin-bottom:1rem; box-shadow: var(--shadow-brand);}
.step h3 { font-size:1.1rem; margin-bottom:.5rem;}
.step p { color:var(--ink-500); font-size:.92rem;}

/* ============ 为什么选我们 ============ */
.why { display:grid; grid-template-columns: repeat(3,1fr); gap: var(--gap);}
.why__item { display:flex; gap:1rem; align-items:flex-start;}
.why__ic { flex:0 0 48px; width:48px; height:48px; border-radius:14px; background:var(--grad-brand-soft); color:var(--brand-600); display:grid; place-items:center;}
.why__ic svg{ width:24px; height:24px;}
.why__item h3{ font-size:1.08rem; margin-bottom:.35rem;}
.why__item p{ color:var(--ink-500); font-size:.93rem;}

/* ============ 数据条 ============ */
.stats-band { background: var(--grad-hero); color:#fff; }
.stats-band .grid--4 { text-align:center; }
.stat-big b { font-size: clamp(2rem,4.5vw,3rem); font-weight:800; color:#fff; display:block; }
.stat-big span { color:#c3cdec; font-size:.95rem; }

/* ============ 案例 / 社会证明 ============ */
.case { overflow:hidden; }
.case__media { height: 180px; border-radius: var(--r-md); background: var(--grad-brand-soft); margin-bottom:1.1rem; display:grid; place-items:center; color:var(--brand-600); font-weight:800;}
.case__meta { display:flex; gap:.5rem; flex-wrap:wrap; margin-bottom:.7rem;}
.chip { font-size:.75rem; font-weight:700; color:var(--brand-600); background:var(--brand-50); padding:.25rem .7rem; border-radius:var(--r-full);}
.case h3{ font-size:1.1rem; margin-bottom:.5rem;}
.case p{ color:var(--ink-500); font-size:.92rem;}
.case__result { margin-top:1rem; padding-top:1rem; border-top:1px solid var(--line); display:flex; gap:1.5rem;}
.case__result b{ color:var(--success); font-size:1.3rem; display:block;}
.case__result span{ font-size:.78rem; color:var(--ink-400);}

/* 评价 */
.quote { background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); padding:1.8rem; box-shadow:var(--shadow-sm);}
.quote p { font-size:1.02rem; color:var(--ink-700); margin-bottom:1.2rem;}
.quote__author { display:flex; align-items:center; gap:.8rem;}
.quote__avatar { width:44px; height:44px; border-radius:50%; background:var(--grad-brand); color:#fff; display:grid; place-items:center; font-weight:800;}
.quote__author b{ color:var(--ink-900); display:block; font-size:.95rem;}
.quote__author span{ color:var(--ink-400); font-size:.82rem;}

/* ============ FAQ ============ */
.faq { max-width: 820px; margin-inline:auto; display:grid; gap:.9rem; }
.faq__item { border:1px solid var(--line); border-radius: var(--r-md); background:#fff; overflow:hidden; transition:box-shadow .2s;}
.faq__item[open] { box-shadow: var(--shadow-md); }
.faq__q { display:flex; align-items:center; justify-content:space-between; gap:1rem; padding: 1.1rem 1.3rem; font-weight:700; color:var(--ink-900); cursor:pointer; list-style:none; font-size:1.02rem;}
.faq__q::-webkit-details-marker{ display:none;}
.faq__q .ico{ flex:0 0 22px; width:22px; height:22px; transition: transform .25s; color:var(--brand-600);}
.faq__item[open] .faq__q .ico{ transform: rotate(45deg);}
.faq__a { padding: 0 1.3rem 1.2rem; color:var(--ink-500); font-size:.96rem;}

/* ============ CTA 区 ============ */
.cta-band { background: var(--grad-hero); color:#fff; border-radius: 0; text-align:center; position:relative; overflow:hidden;}
.cta-band h2 { color:#fff; font-size: var(--fs-h2); margin-bottom:1rem;}
.cta-band p { color:#d3ddf5; font-size: var(--fs-lead); max-width:600px; margin:0 auto 2rem;}
.cta-band .hero__cta{ justify-content:center;}

/* ============ 联系表单 ============ */
.contact { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,4vw,3.5rem); align-items:start;}
.contact__info h2{ font-size: var(--fs-h2); margin-bottom:1rem;}
.contact__info p{ color:var(--ink-500); margin-bottom:2rem; font-size:var(--fs-lead);}
.contact__list{ display:grid; gap:1.2rem;}
.contact__row{ display:flex; gap:1rem; align-items:flex-start;}
.contact__row .ic{ flex:0 0 44px; width:44px; height:44px; border-radius:12px; background:var(--grad-brand-soft); color:var(--brand-600); display:grid; place-items:center;}
.contact__row b{ color:var(--ink-900); display:block; font-size:.95rem;}
.contact__row span{ color:var(--ink-500); font-size:.92rem;}
.contact__qr{ width:104px; height:104px; border-radius:12px; margin-top:.55rem; border:1px solid var(--line); display:block; background:#fff; padding:4px;}
.form { background:#fff; border:1px solid var(--line); border-radius: var(--r-lg); padding: clamp(1.5rem,3vw,2.2rem); box-shadow: var(--shadow-md);}
.form h3{ font-size:1.3rem; margin-bottom:.4rem;}
.form > p{ color:var(--ink-500); font-size:.92rem; margin-bottom:1.4rem;}
.field { margin-bottom:1rem;}
.field label{ display:block; font-size:.86rem; font-weight:600; color:var(--ink-700); margin-bottom:.4rem;}
.field input, .field select, .field textarea{
  width:100%; padding:.8rem 1rem; border:1px solid var(--line); border-radius: var(--r-md);
  font-family:inherit; font-size:.95rem; color:var(--ink-900); background:var(--bg-soft); transition:border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(59,110,245,.15); background:#fff;}
.field textarea{ resize:vertical; min-height:90px;}
.form__note{ font-size:.8rem; color:var(--ink-400); margin-top:.8rem; text-align:center;}
.form__ok{ display:none; background:#ecfdf5; border:1px solid #a7f3d0; color:#047857; padding:.9rem 1rem; border-radius:var(--r-md); font-size:.92rem; margin-bottom:1rem;}
.form__ok.show{ display:block;}

/* ============ 页脚 ============ */
.footer { background: var(--ink-900); color:#c7d0e0; padding-top: clamp(3rem,6vw,4.5rem);}
.footer a{ color:#c7d0e0; transition:color .2s;}
.footer a:hover{ color:#fff;}
.footer__grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: var(--gap); padding-bottom:2.5rem;}
.footer .brand{ color:#fff; margin-bottom:1rem;}
.footer .brand__sub{ color:#8b98b5;}
.footer__desc{ color:#8b98b5; font-size:.92rem; max-width:320px;}
.footer__col h4{ color:#fff; font-size:.98rem; margin-bottom:1.1rem;}
.footer__col ul{ display:grid; gap:.7rem; font-size:.92rem;}
.footer__qr{ width:120px; height:120px; border-radius:var(--r-md); background:#fff; display:grid; place-items:center; color:var(--ink-400); font-size:.78rem; text-align:center; margin-top:.5rem;}
.footer__bottom{ border-top:1px solid rgba(255,255,255,.1); padding: 1.5rem 0; display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap; font-size:.85rem; color:#8b98b5;}
.footer__bottom a{ color:#8b98b5;}

/* ============ 悬浮咨询 ============ */
.floaty { position:fixed; right:18px; bottom:22px; z-index:90; display:flex; flex-direction:column; gap:.7rem;}
.floaty__btn { width:56px; height:56px; border-radius:16px; background:var(--grad-brand); color:#fff; display:grid; place-items:center; box-shadow:var(--shadow-brand); position:relative; transition:transform .2s;}
.floaty__btn:hover{ transform:translateY(-3px) scale(1.05);}
.floaty__btn svg{ width:26px; height:26px;}
.floaty__btn .tip{ position:absolute; right:70px; top:50%; transform:translateY(-50%); background:var(--ink-900); color:#fff; font-size:.8rem; padding:.4rem .8rem; border-radius:var(--r-sm); white-space:nowrap; opacity:0; pointer-events:none; transition:opacity .2s;}
.floaty__btn:hover .tip{ opacity:1;}
.floaty__top{ width:46px; height:46px; margin-left:5px; border-radius:12px; background:#fff; color:var(--brand-600); box-shadow:var(--shadow-md); display:grid; place-items:center;}
.floaty__phone{ background:linear-gradient(135deg,#10b981,#059669); }
.floaty__phone:hover{ transform:translateY(-3px) scale(1.08); }
/* 微信二维码：悬浮/点击展开，悬于拨号按钮下方 */
.floaty__wechat { background: linear-gradient(135deg,#1aad19,#07c160); }
.floaty__wechat:hover { transform: translateY(-3px) scale(1.08); }
.floaty__qrwrap { position: relative; }
.floaty__qrcard {
  position: absolute; right: 70px; bottom: 0; width: 158px;
  background:#fff; border-radius: var(--r-md); box-shadow: var(--shadow-lg);
  padding:.7rem .7rem .6rem; text-align:center;
  opacity:0; transform: translateX(12px) scale(.96); transform-origin: right bottom;
  pointer-events:none; transition: opacity .22s ease, transform .22s ease; z-index:5;
}
.floaty__qrwrap:hover .floaty__qrcard,
.floaty__qrwrap.open .floaty__qrcard { opacity:1; transform: translateX(0) scale(1); pointer-events:auto; }
.floaty__qrcard .floaty__qrh { font-size:.8rem; font-weight:700; color:var(--ink-900); margin-bottom:.5rem; }
.floaty__qrcard img { width:124px; height:124px; border-radius:8px; display:block; margin:0 auto; background:#fff; }
.floaty__qrcard .floaty__qrtip { font-size:.72rem; color:var(--ink-500); margin-top:.4rem; }

/* ============ 面包屑 & 页面头 ============ */
.pagehead { background: var(--grad-hero); color:#fff; padding-top: calc(var(--nav-h) + 3rem); padding-bottom: clamp(2.5rem,5vw,4rem); position:relative;}
.pagehead h1{ color:#fff; font-size: var(--fs-hero); margin:.6rem 0 1rem;}
.pagehead p{ color:#d3ddf5; font-size:var(--fs-lead); max-width:620px;}
.breadcrumb{ display:flex; gap:.5rem; align-items:center; font-size:.85rem; color:#aebbe0;}
.breadcrumb a:hover{ color:#fff;}

/* ============ 动画 ============ */
.reveal { opacity:0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ .reveal{ opacity:1; transform:none; transition:none;} .chart .bar{ animation:none;} html{scroll-behavior:auto;} }

/* ===== 概念块（AI能见度等说明） ===== */
.concept{ background: var(--brand-50); border:1px solid var(--brand-100); border-radius: var(--r-lg); padding: clamp(1.2rem,3vw,1.8rem); margin-bottom: clamp(1.6rem,4vw,2.4rem); }
.concept h3{ color: var(--brand-700); font-size: var(--fs-h3); margin-bottom:.6rem; }
.concept p{ color: var(--ink-600); }

/* ===== 招合作伙伴高亮按钮 ===== */
.btn--partner{ background: linear-gradient(135deg,#f59e0b,#f97316); color:#fff; box-shadow: 0 6px 18px rgba(249,115,22,.32); }
.btn--partner:hover{ transform: translateY(-2px); box-shadow: 0 10px 26px rgba(249,115,22,.42); color:#fff; }

/* ===== 信任背书 ===== */
.trust-badges{ display:grid; grid-template-columns: repeat(4,1fr); gap:1rem; margin-bottom: clamp(1.6rem,4vw,2.4rem); }
.trust-badge{ background:#fff; border:1px solid var(--brand-100); border-radius: var(--r-lg); padding:1.2rem 1rem; text-align:center; box-shadow: var(--shadow-sm); }
.trust-badge .ic{ font-size:1.9rem; }
.trust-badge b{ display:block; margin:.5rem 0 .2rem; color: var(--ink-900); font-size:.98rem; }
.trust-badge span{ font-size:.8rem; color: var(--ink-500); }
.logo-wall{ display:grid; grid-template-columns: repeat(6,1fr); gap:.8rem; margin-top:1rem; }
.logo-item{ display:grid; place-items:center; min-height:64px; background:#fff; border:1px solid var(--brand-100); border-radius: var(--r-md); color: var(--ink-400); font-weight:700; font-size:.9rem; }
@media (max-width: 860px){ .trust-badges{ grid-template-columns: repeat(2,1fr); } .logo-wall{ grid-template-columns: repeat(3,1fr); } }
@media (max-width: 560px){ .logo-wall{ grid-template-columns: repeat(2,1fr); } }

/* =========================================================
   响应式：自动适配 PC / 平板 / 移动端
   ========================================================= */
@media (max-width: 1024px){
  .grid--4 { grid-template-columns: repeat(2,1fr); }
  .grid--5 { grid-template-columns: repeat(3,1fr); }
  .why, .steps { grid-template-columns: repeat(2,1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
/* 导航在 ≤1080px 折叠为汉堡，避免中等屏（笔记本/平板）文字挤压、显示不全 */
@media (max-width: 1080px){
  .nav__menu { position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; align-items: stretch;
    background:#fff; padding: 1rem; gap:.2rem; border-bottom:1px solid var(--line); box-shadow: var(--shadow-lg);
    transform: translateY(-140%); transition: transform .3s ease; }
  .nav__menu.open { transform: translateY(0); }
  .nav__menu .nav__link { padding:.9rem .5rem; border-bottom:1px solid var(--bg-soft); }
  .nav__toggle { display:block; }
  .nav__actions .btn--outline { display:none; }
  .brand__sub { display:none; }
  .nav.open .nav__toggle span:nth-child(1){ transform: translateY(6px) rotate(45deg);}
  .nav.open .nav__toggle span:nth-child(2){ opacity:0;}
  .nav.open .nav__toggle span:nth-child(3){ transform: translateY(-6px) rotate(-45deg);}
}
@media (max-width: 860px){
  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { order:-1; }
  .product { grid-template-columns: 1fr; }
  .product__media { order:-1; min-height:auto; }
  .contact { grid-template-columns: 1fr; }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .grid--5 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 560px){
  .grid--4 { grid-template-columns: 1fr; }
  .grid--5 { grid-template-columns: 1fr; }
  .why, .steps { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__cta .btn, .cta-band .btn { width:100%; }
  .kpi-row { grid-template-columns: repeat(3,1fr); gap:.4rem; }
  .kpi { padding:.55rem; }
  .kpi b { font-size:1rem; }
}