/* ============================================================
   AIZS 站点样式 —— 优化版布局
   配色：暖白底 + 单一冷蓝强调色（沿用原站配色体系，重排结构）
   改动要点：统一 spacing 节奏、卡片等高、栅格对齐、移动端优先
   ============================================================ */
:root{
  --color-bg:#FAFAF9;
  --color-bg-card:#FFFFFF;
  --color-bg-elev:#F5F5F4;
  --color-text:#0A0A0A;
  --color-text-muted:#525252;
  --color-text-soft:#737373;
  --color-border:#E7E5E4;
  --color-border-strong:#D6D3D1;
  --color-accent:#2563EB;
  --color-accent-hover:#1D4ED8;
  --color-accent-soft:#EFF6FF;
  --color-success:#16A34A;
  --color-price:#DC2626;
  --footer-bg:#0A0A0A;

  --font-body:"Plus Jakarta Sans","Noto Sans SC","PingFang SC",-apple-system,BlinkMacSystemFont,sans-serif;
  --font-display:var(--font-body);

  --shadow-sm:0 1px 2px rgba(10,10,10,.04);
  --shadow-md:0 4px 12px rgba(10,10,10,.06);
  --shadow-lg:0 12px 32px rgba(10,10,10,.09);

  /* 统一间距节奏 */
  --space-xs:8px;
  --space-sm:14px;
  --space-md:22px;
  --space-lg:34px;
  --space-xl:52px;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1160px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.num{font-variant-numeric:tabular-nums}

/* ---------- 导航 ---------- */
.nav-main{
  position:sticky;top:0;z-index:100;
  background:rgba(250,250,249,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--color-border);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;
  padding:12px 24px;
  display:flex;align-items:center;gap:var(--space-lg);
}
.nav-logo{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.nav-logo-mark{flex:0 0 auto}
.nav-logo-text{display:flex;flex-direction:column;line-height:1.25}
.brand-badge{font-weight:800;font-size:1.02rem;letter-spacing:-.01em}
.brand-ai66{color:var(--color-text)}
.brand-org{color:var(--color-accent)}
.nav-logo-sub{font-size:.72rem;color:var(--color-text-soft);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:var(--space-md);margin-left:auto;flex-wrap:wrap}
.nav-links a{
  font-size:.9rem;font-weight:500;color:var(--color-text-muted);
  transition:color .15s;
}
.nav-links a:hover{color:var(--color-accent)}
.nav-actions{flex:0 0 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  font-weight:700;font-size:.92rem;
  border-radius:999px;border:none;cursor:pointer;
  padding:12px 26px;
  transition:transform .15s,box-shadow .15s,background .15s;
  font-family:inherit;
}
.btn-primary-new{background:var(--color-accent);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,.28)}
.btn-primary-new:hover{background:var(--color-accent-hover);transform:translateY(-1px);box-shadow:0 8px 22px rgba(37,99,235,.34)}
.btn-secondary-new{background:#fff;color:var(--color-text);border:1.5px solid var(--color-border-strong)}
.btn-secondary-new:hover{border-color:var(--color-accent);color:var(--color-accent)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:var(--space-xl) 24px calc(var(--space-xl) + 10px);
  background:linear-gradient(180deg,#F7FAFF 0%,var(--color-bg) 100%);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(var(--color-border) 1px,transparent 1px),
                   linear-gradient(90deg,var(--color-border) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.5;
  mask-image:radial-gradient(ellipse 75% 62% at 50% 22%,#000 42%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 75% 62% at 50% 22%,#000 42%,transparent 100%);
}
.hero-inner{
  position:relative;max-width:var(--maxw);margin:0 auto;
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--space-md);
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  background:#fff;border:1px solid var(--color-border);
  border-radius:999px;padding:7px 17px;
  font-size:.84rem;font-weight:600;color:var(--color-text-muted);
  box-shadow:var(--shadow-sm);
}
.badge-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--color-success);
  box-shadow:0 0 0 3px rgba(22,163,74,.16);
}
.hero-title{
  font-size:clamp(1.9rem,5.2vw,3.3rem);
  font-weight:900;line-height:1.18;letter-spacing:-.022em;
}
.hero-title-accent{
  background:linear-gradient(120deg,var(--color-accent) 0%,#0891B2 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-subtitle{font-size:clamp(1rem,2.4vw,1.22rem);font-weight:700;color:var(--color-text-muted)}
.hero-meta{
  font-size:.95rem;color:var(--color-text-soft);
  max-width:660px;line-height:1.75;
}
.hero-cta{display:flex;gap:var(--space-sm);flex-wrap:wrap;justify-content:center;margin-top:6px}
.hero-trust{
  display:flex;gap:var(--space-md);flex-wrap:wrap;justify-content:center;
  font-size:.85rem;color:var(--color-text-muted);font-weight:500;
}
.hero-trust-item{display:inline-flex;align-items:center;gap:6px}
.hero-trust-item svg{color:var(--color-accent);flex:0 0 auto}

/* 客服微信卡 */
.hero-wx-card{
  margin-top:var(--space-sm);
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius);padding:var(--space-md);
  box-shadow:var(--shadow-md);
  max-width:620px;width:100%;
  text-align:left;
}
.hero-wx-card-head{display:flex;gap:18px;align-items:flex-start}
.hero-wx-card-copy{flex:1;min-width:0}
.hero-wx-card-title{font-weight:800;font-size:1rem}
.hero-wx-card-sub{font-size:.85rem;color:var(--color-text-soft);margin-top:3px}
.hero-wx-card-row{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:9px;flex-wrap:wrap;
}
.hero-wx-card-line{font-size:.88rem;color:var(--color-text-muted)}
.hero-wx-id{
  font-family:ui-monospace,"SF Mono",monospace;
  background:var(--color-accent-soft);color:var(--color-accent);
  padding:3px 9px;border-radius:6px;font-size:.88rem;
}
.hero-wx-copy{
  background:var(--color-accent-soft);color:var(--color-accent);
  border:1px solid #BFDBFE;border-radius:8px;
  padding:6px 14px;font-size:.8rem;font-weight:700;
  cursor:pointer;font-family:inherit;white-space:nowrap;
  transition:background .15s;
}
.hero-wx-copy:hover{background:#DBEAFE}

/* ---------- 通用 section ---------- */
.section{padding:var(--space-xl) 24px}
.section-inner{max-width:var(--maxw);margin:0 auto}
.section-header{text-align:center;margin-bottom:var(--space-lg)}
.section-eyebrow{
  display:inline-block;font-size:.78rem;font-weight:800;
  letter-spacing:.09em;text-transform:uppercase;
  color:var(--color-accent);margin-bottom:11px;
}
.section-title{
  font-size:clamp(1.5rem,3.6vw,2.1rem);
  font-weight:900;letter-spacing:-.02em;line-height:1.25;
}
.section-desc{
  font-size:.95rem;color:var(--color-text-soft);
  margin-top:11px;line-height:1.7;max-width:680px;margin-left:auto;margin-right:auto;
}

/* ---------- 服务卡片（等高栅格） ---------- */
.category-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(310px,1fr));
  gap:var(--space-md);
}
.category-card{
  background:var(--color-bg-card);
  border:1px solid var(--color-border);
  border-radius:var(--radius);
  padding:var(--space-md);
  display:flex;flex-direction:column;
  transition:transform .18s,box-shadow .18s,border-color .18s;
}
.category-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
  border-color:#BFDBFE;
}
.category-head{display:flex;flex-direction:column;gap:5px}
.category-logo{
  width:46px;height:46px;border-radius:12px;
  margin-bottom:9px;
}
.category-eyebrow{
  font-size:.72rem;font-weight:800;letter-spacing:.08em;
  text-transform:uppercase;color:var(--color-text-soft);
}
.category-badge{
  align-self:flex-start;
  background:#FEF3C7;color:#92400E;
  font-size:.68rem;font-weight:800;
  padding:3px 9px;border-radius:999px;
  letter-spacing:.02em;
}
.category-name{font-size:1.12rem;font-weight:800;letter-spacing:-.01em}
.category-variants{font-size:.85rem;color:var(--color-text-soft);line-height:1.55}
.category-price{
  display:flex;align-items:baseline;gap:3px;
  margin:var(--space-sm) 0;
  padding-bottom:var(--space-sm);
  border-bottom:1px solid var(--color-border);
}
.category-currency{font-size:.95rem;font-weight:700;color:var(--color-price)}
.category-amount{font-size:2rem;font-weight:900;color:var(--color-price);line-height:1}
.category-from{font-size:.8rem;color:var(--color-text-soft);margin-left:3px}
.category-feats{
  list-style:none;display:flex;flex-direction:column;gap:8px;
  flex:1;margin-bottom:var(--space-sm);
}
.category-feats li{
  font-size:.85rem;color:var(--color-text-muted);
  padding-left:19px;position:relative;line-height:1.55;
}
.category-feats li::before{
  content:"";position:absolute;left:2px;top:8px;
  width:6px;height:6px;border-radius:50%;
  background:var(--color-success);
}
.category-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.87rem;font-weight:700;color:var(--color-accent);
  margin-top:auto;
}
.category-link:hover{gap:9px}

/* ---------- 优势 ---------- */
.features-section{background:var(--color-bg-elev)}
.features-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:var(--space-md);
}
.feature-card{
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius);padding:var(--space-md);
  display:flex;flex-direction:column;gap:9px;
}
.feature-ico{
  width:44px;height:44px;border-radius:12px;
  font-size:1.05rem;
}
.feature-title{font-size:1.02rem;font-weight:800}
.feature-desc{font-size:.86rem;color:var(--color-text-muted);line-height:1.65}

/* ---------- 数据统计 ---------- */
.stats-row{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:var(--space-md);
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius);padding:var(--space-lg) var(--space-md);
}
.stat-item{text-align:center}
.stat-num{
  font-size:clamp(1.6rem,3.4vw,2.2rem);
  font-weight:900;color:var(--color-accent);line-height:1.1;
  letter-spacing:-.02em;
}
.stat-label{font-size:.83rem;color:var(--color-text-soft);margin-top:6px}

/* ---------- 流程 ---------- */
.flow-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:var(--space-md);
  counter-reset:flow;
}
.flow-item{
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius);padding:var(--space-md);
  display:flex;gap:15px;align-items:flex-start;
  position:relative;
}
.flow-num{
  flex:0 0 38px;width:38px;height:38px;border-radius:50%;
  background:var(--color-accent);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:1rem;
}
.flow-body{flex:1;min-width:0}
.flow-title{font-size:1rem;font-weight:800;line-height:1.4}
.flow-desc{font-size:.85rem;color:var(--color-text-muted);margin-top:5px;line-height:1.65}

/* ---------- 对比 ---------- */
.cmp-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);
}
.cmp-box{border-radius:var(--radius);padding:var(--space-md)}
.cmp-no{background:#fff;border:2px solid #F0DCD8}
.cmp-yes{background:#F4FBF6;border:2px solid #C9ECD6}
.cmp-head{
  display:flex;align-items:center;gap:9px;
  font-size:1.02rem;font-weight:900;margin-bottom:var(--space-sm);
}
.cmp-no .cmp-head{color:#B3413A}
.cmp-yes .cmp-head{color:#1E7A45}
.cmp-mk{
  width:25px;height:25px;border-radius:50%;flex:0 0 25px;
  display:flex;align-items:center;justify-content:center;
  font-size:.85rem;font-weight:900;color:#fff;
}
.cmp-no .cmp-mk{background:#D97069}
.cmp-yes .cmp-mk{background:#35B06A}
.cmp-box ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.cmp-box li{
  font-size:.87rem;color:#4A5A6E;line-height:1.6;
  padding-left:18px;position:relative;
}
.cmp-box li::before{
  content:"";position:absolute;left:0;top:8px;
  width:6px;height:6px;border-radius:50%;
}
.cmp-no li::before{background:#E5A49F}
.cmp-yes li::before{background:#5CC489}

/* ---------- 评价 ---------- */
.rev-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:var(--space-md);
}
.rev-card{
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius);padding:var(--space-md);
}
.rev-img{border-radius:var(--radius-sm);margin-bottom:12px}
.rev-name{font-weight:800;font-size:.92rem;margin-bottom:6px}
.rev-text{font-size:.86rem;color:var(--color-text-muted);line-height:1.65}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:11px}
.faq-item{
  background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  padding:15px 19px;
  transition:border-color .15s;
}
.faq-item[open]{border-color:#BFDBFE}
.faq-q{
  font-size:.95rem;font-weight:700;cursor:pointer;
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"+";font-size:1.25rem;font-weight:400;
  color:var(--color-accent);flex:0 0 auto;line-height:1;
}
.faq-item[open] .faq-q::after{content:"−"}
.faq-a{
  font-size:.87rem;color:var(--color-text-muted);
  line-height:1.78;margin-top:11px;padding-top:11px;
  border-top:1px solid var(--color-border);
}

/* ---------- 底部 CTA ---------- */
.cta-box{
  background:linear-gradient(135deg,var(--color-accent) 0%,#0891B2 100%);
  border-radius:var(--radius);padding:var(--space-lg) var(--space-md);
  text-align:center;color:#fff;
  box-shadow:0 14px 36px rgba(37,99,235,.26);
}
.cta-title{
  font-size:clamp(1.35rem,3.2vw,1.85rem);
  font-weight:900;letter-spacing:-.018em;
}
.cta-desc{font-size:.94rem;opacity:.94;margin-top:11px}
.cta-btn{
  background:#fff;color:var(--color-accent);
  margin-top:var(--space-md);
  padding:13px 34px;
}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.16)}
.cta-visits{
  font-size:.82rem;opacity:.85;margin-top:15px;
}

/* ---------- 页脚 ---------- */
.foot-main{background:var(--footer-bg);color:#A3A3A3;padding:var(--space-lg) 24px var(--space-md)}
.foot-inner{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:var(--space-lg);
}
.foot-logo{color:#fff;font-weight:900;font-size:1.12rem;margin-bottom:11px}
.foot-desc{font-size:.83rem;line-height:1.72;max-width:330px}
.foot-h{color:#fff;font-weight:800;font-size:.88rem;margin-bottom:12px}
.foot-col{display:flex;flex-direction:column;gap:9px;font-size:.83rem}
.foot-col a{transition:color .15s}
.foot-col a:hover{color:#fff}
.foot-bottom{
  max-width:var(--maxw);margin:var(--space-lg) auto 0;
  padding-top:var(--space-md);
  border-top:1px solid #262626;
  font-size:.76rem;color:#737373;text-align:center;line-height:1.7;
}

/* ---------- 悬浮按钮 ---------- */
.float-btn{
  position:fixed;right:20px;bottom:20px;z-index:90;
  background:var(--color-accent);color:#fff;
  padding:13px 24px;border-radius:999px;
  font-weight:800;font-size:.9rem;
  box-shadow:0 8px 24px rgba(37,99,235,.38);
  transition:transform .15s,box-shadow .15s;
}
.float-btn:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(37,99,235,.46)}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:38px;transform:translateX(-50%) translateY(20px);
  background:#0A0A0A;color:#fff;
  padding:11px 24px;border-radius:999px;
  font-size:.85rem;font-weight:600;
  opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;
  z-index:200;
}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 入场动画 ---------- */
.rise-in{animation:rise .62s cubic-bezier(.22,.9,.3,1) both}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .rise-in{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .foot-inner{grid-template-columns:1fr 1fr;gap:var(--space-md)}
  .nav-links{display:none}
}
@media (max-width:680px){
  :root{--space-xl:38px;--space-lg:26px}
  .nav-inner{padding:11px 16px}
  .hero{padding:38px 16px 42px}
  .section{padding:38px 16px}
  .cmp-wrap{grid-template-columns:1fr}
  .foot-inner{grid-template-columns:1fr;gap:var(--space-md)}
  .hero-wx-card-head{flex-direction:column;gap:13px}
  .hero-wx-card{text-align:center}
  .hero-wx-card-row{justify-content:center}
  .float-btn{right:14px;bottom:14px;padding:12px 20px;font-size:.85rem}
}