/* ============================================================
   广州幻客互联科技有限公司 · 官网全站样式
   风格基线：E:/wb/holds.ink/index.html（逐 token 一致）
   分层：L0 变量 / L1 Reset / L2 布局 / L3 元素 / L4 组件
         / L5 页面级 / L6 响应式
   ============================================================ */

/* ===== L0 变量 ===== */
:root{
  /* 品牌色 */
  --c-primary:#6366f1; --c-primary-dark:#4f46e5; --c-violet:#8b5cf6;
  --grad-brand:linear-gradient(135deg,#6366f1,#8b5cf6);
  /* 文字四级 */
  --c-ink:#1e293b; --c-text:#475569; --c-muted:#64748b; --c-faint:#94a3b8;
  /* 背景与边框 */
  --c-bg:#f8fafc; --c-card:#fff;
  --c-border:#e2e8f0; --c-border-soft:#eef2f6; --c-border-inner:#f1f5f9;
  /* 点缀 */
  --c-badge-bg:#eef2ff; --c-badge-text:#4f46e5; --c-green:#22c55e;
  /* 产品线 accent（仅小面积） */
  --accent:#6366f1; --accent-rgb:99,102,241;
  /* 圆角 / 阴影 */
  --radius-card:20px; --radius-btn:8px; --radius-chip:14px;
  --shadow-card:0 20px 40px -12px rgba(0,0,0,.1);
  /* 字号（沿用现有页面的全部取值） */
  --fs-logo-sub:.62rem; --fs-tag:.75rem; --fs-colhead:.8rem;
  --fs-note:.82rem; --fs-feature:.84rem; --fs-desc:.85rem;
  --fs-notice:.88rem; --fs-nav:.9rem; --fs-faq-q:.95rem; --fs-body:1rem;
  --fs-card-h4:1.05rem; --fs-brand:1.1rem; --fs-step:1.15rem;
  --fs-logo:1.35rem; --fs-cat-h3:1.45rem;
  /* 字体 */
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}

/* ===== L1 Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--c-bg);color:var(--c-ink);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{display:block;max-width:100%}
button{font-family:inherit}

/* ===== L2 布局 ===== */
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-head{text-align:center;margin-bottom:48px}
.section-head .eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--c-primary);margin-bottom:12px}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;letter-spacing:-.01em;margin-bottom:12px}
.section-head p{color:var(--c-muted);font-size:var(--fs-body);max-width:600px;margin:0 auto}

/* ===== L3 Header ===== */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.06)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:var(--fs-logo);font-weight:700;color:var(--c-ink)}
.logo-icon{width:36px;height:36px;background:var(--grad-brand);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.05rem;font-weight:800}
.logo small{display:block;font-size:var(--fs-logo-sub);font-weight:500;color:var(--c-faint);letter-spacing:.02em;margin-top:-2px}
.nav{display:flex;align-items:center;gap:32px}
.nav>a,.nav .nav-item>a{font-size:var(--fs-nav);font-weight:500;color:var(--c-text);transition:color .2s;position:relative;display:flex;align-items:center;gap:4px}
.nav a:hover,.nav a.active{color:var(--c-primary)}
.nav a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--c-primary);border-radius:1px}
.nav-cta{background:var(--c-primary);color:#fff!important;padding:8px 20px;border-radius:var(--radius-btn);font-weight:600!important;transition:background .2s,transform .15s!important}
.nav-cta:hover{background:var(--c-primary-dark);transform:translateY(-1px)}
.nav-cta::after{display:none!important}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:4px;color:var(--c-text)}

/* 下拉菜单（CSS hover/focus-within 基线，无 JS 也可用） */
.nav-item{position:relative}
.nav-item .chev{transition:transform .2s}
.nav-item:hover .chev,.nav-item:focus-within .chev{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 10px);left:50%;transform:translate(-50%,8px);background:#fff;border:1px solid var(--c-border);border-radius:16px;box-shadow:0 24px 48px -12px rgba(0,0,0,.14);padding:20px;display:grid;grid-template-columns:1fr 1fr;gap:8px 28px;min-width:420px;opacity:0;visibility:hidden;transition:opacity .2s,transform .2s,visibility .2s;z-index:110}
.nav-item:hover .dropdown,.nav-item:focus-within .dropdown{opacity:1;visibility:visible;transform:translate(-50%,0)}
.dropdown-col{display:flex;flex-direction:column}
.dropdown-group{font-size:var(--fs-colhead);font-weight:700;color:var(--c-faint);text-transform:uppercase;letter-spacing:.06em;padding:6px 12px 8px;border-bottom:1px solid var(--c-border-inner);margin-bottom:6px}
.dropdown a{display:flex;align-items:center;gap:10px;font-size:var(--fs-nav);font-weight:500;color:var(--c-text);padding:9px 12px;border-radius:10px;transition:background .15s,color .15s}
.dropdown a:hover{background:var(--c-badge-bg);color:var(--c-primary)}
.dropdown a.active{color:var(--c-primary);background:var(--c-badge-bg)}
.dropdown a.active::after{display:none}
.dropdown .dot{flex-shrink:0;width:8px;height:8px;border-radius:3px}

/* 移动端抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;z-index:200}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;background:#fff;z-index:210;transform:translateX(100%);transition:transform .3s ease;display:flex;flex-direction:column;padding:20px;overflow-y:auto}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{background:none;border:none;cursor:pointer;color:var(--c-text);padding:6px}
.drawer-link{display:block;font-size:var(--fs-body);font-weight:600;color:var(--c-ink);padding:12px 8px;border-bottom:1px solid var(--c-border-inner)}
.drawer-sub{display:block;font-size:var(--fs-desc);color:var(--c-text);padding:9px 8px 9px 22px}
.drawer-sub.hl{color:var(--c-primary)}
.drawer-group-label{font-size:var(--fs-colhead);font-weight:700;color:var(--c-faint);text-transform:uppercase;letter-spacing:.06em;padding:14px 8px 6px}
.drawer-cta{margin-top:22px;display:block;text-align:center;background:var(--c-primary);color:#fff;padding:13px;border-radius:12px;font-weight:700;font-size:var(--fs-body)}

/* ===== L3 Hero（首页） ===== */
.hero{padding:84px 0 56px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--c-badge-bg);color:var(--c-badge-text);font-size:var(--fs-note);font-weight:600;padding:6px 16px;border-radius:100px;margin-bottom:24px}
.hero-badge::before{content:'';width:8px;height:8px;background:var(--c-green);border-radius:50%;animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(2rem,4vw,3.1rem);font-weight:800;letter-spacing:-.02em;line-height:1.18;margin-bottom:18px}
.hero h1 span{background:var(--grad-brand);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.1rem;color:var(--c-muted);max-width:620px;margin:0 auto 8px}
.hero .hero-sub{font-size:var(--fs-body);color:var(--c-faint);max-width:560px}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:12px;font-size:var(--fs-body);font-weight:700;transition:all .2s;cursor:pointer;border:none}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.3)}
.btn-outline{background:transparent;border:1.5px solid var(--c-border);color:var(--c-ink)}
.btn-outline:hover{background:#fff;border-color:#cbd5e1}

/* ===== L4 子页 Page Hero / 面包屑 ===== */
.page-hero{padding:64px 0 48px;text-align:center;background:#fff;border-bottom:1px solid var(--c-border-soft)}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:var(--fs-desc);color:var(--c-faint);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:var(--c-muted);transition:color .2s}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:#cbd5e1}
.page-hero h1{font-size:clamp(1.9rem,3.6vw,2.7rem);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.page-hero h1 span{background:var(--grad-brand);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.page-hero .lede{font-size:1.08rem;color:var(--c-muted);max-width:640px;margin:0 auto}
.page-hero .page-tags{display:flex;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.tag-chip{background:rgba(var(--accent-rgb),.1);color:var(--accent);font-size:var(--fs-desc);font-weight:600;padding:6px 14px;border-radius:100px}

/* ===== L4 卡片体系 ===== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.card-grid.col-2{grid-template-columns:repeat(2,1fr)}
.card-grid.col-4{grid-template-columns:repeat(4,1fr)}
.pricing-card{background:var(--c-card);border-radius:var(--radius-card);padding:34px 28px;border:1px solid var(--c-border);position:relative;transition:transform .3s,box-shadow .3s,border-color .3s;display:flex;flex-direction:column}
.pricing-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.pricing-card.popular{border-color:var(--c-primary);box-shadow:0 0 0 1px var(--c-primary),0 12px 32px -8px rgba(99,102,241,.2)}
.popular-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad-brand);color:#fff;font-size:var(--fs-tag);font-weight:600;padding:5px 18px;border-radius:100px;white-space:nowrap}
.card-plan-name{font-size:var(--fs-note);font-weight:700;color:var(--c-primary);letter-spacing:.04em;margin-bottom:14px;text-transform:uppercase}
.card-price-wrap{display:flex;align-items:baseline;gap:4px;margin-bottom:6px;flex-wrap:wrap}
.card-currency{font-size:1.25rem;font-weight:600;color:var(--c-ink);align-self:flex-start;margin-top:6px}
.card-price{font-size:2.7rem;font-weight:800;line-height:1;color:var(--c-ink)}
.card-price.ratio{font-size:2.1rem}
.card-period{font-size:var(--fs-nav);color:var(--c-faint);font-weight:500;align-self:flex-end;margin-bottom:6px}
.card-desc{font-size:var(--fs-desc);color:var(--c-muted);margin-bottom:22px;line-height:1.55}
.card-divider{height:1px;background:var(--c-border-inner);margin-bottom:22px}
.card-features{flex:1;display:flex;flex-direction:column;gap:14px;margin-bottom:28px}
.card-feature{display:flex;align-items:flex-start;gap:10px;font-size:var(--fs-feature);color:var(--c-text);line-height:1.5}
.card-feature::before{content:'';flex-shrink:0;width:18px;height:18px;margin-top:2px;background:var(--c-green);-webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2310b981'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2310b981'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");-webkit-mask-size:contain;mask-size:contain}
.card-feature strong{color:var(--c-ink);font-weight:600}
.card-cta{display:block;text-align:center;padding:12px 24px;border-radius:10px;font-size:var(--fs-nav);font-weight:600;transition:all .2s;cursor:pointer}
.card-cta.outline{background:transparent;border:1.5px solid var(--c-border);color:var(--c-ink)}
.card-cta.outline:hover{background:var(--c-bg);border-color:#cbd5e1}
.card-cta.filled{background:var(--c-primary);color:#fff;border:none}
.card-cta.filled:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.3)}
.card-cta.ghost{background:transparent;border:1.5px solid var(--c-primary);color:var(--c-primary)}
.card-cta.ghost:hover{background:var(--c-badge-bg)}

/* 业务线概览卡（首页） */
.biz-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card);padding:32px 28px;transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column;position:relative;overflow:hidden}
.biz-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.biz-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,rgba(var(--accent-rgb),1),rgba(var(--accent-rgb),.35))}
.biz-icon{width:52px;height:52px;border-radius:14px;background:rgba(var(--accent-rgb),.1);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.biz-icon svg{width:26px;height:26px}
.biz-kicker{font-size:var(--fs-tag);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.biz-card h3{font-size:1.2rem;font-weight:800;color:var(--c-ink);margin-bottom:10px}
.biz-card p{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.65;margin-bottom:18px;flex:1}
.biz-points{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}
.biz-points span{font-size:var(--fs-feature);color:var(--c-text);display:flex;gap:8px;align-items:flex-start}
.biz-points span::before{content:'';flex-shrink:0;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:8px}
.biz-link{display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-desc);font-weight:700;color:var(--accent);transition:gap .2s}
.biz-link:hover{gap:10px}

/* ===== L4 分类（报价分组） ===== */
.category{padding:56px 0;border-top:1px solid var(--c-border-soft)}
.category:first-of-type{border-top:none}
.category-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.category-title{display:flex;align-items:center;gap:16px}
.category-num{flex-shrink:0;width:48px;height:48px;border-radius:var(--radius-chip);background:var(--grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:800}
.category-title h3{font-size:var(--fs-cat-h3);font-weight:800;color:var(--c-ink);letter-spacing:-.01em}
.category-title p{font-size:var(--fs-nav);color:var(--c-muted);margin-top:2px}
.category-note{font-size:var(--fs-note);color:var(--c-faint);max-width:280px;text-align:right}

/* ===== L4 功能模块网格（CRM/ERP） ===== */
.feature-group{margin-bottom:40px}
.feature-group-head{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.feature-group-num{flex-shrink:0;width:40px;height:40px;border-radius:12px;background:rgba(var(--accent-rgb),.1);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:var(--fs-body)}
.feature-group-head h3{font-size:1.12rem;font-weight:800;color:var(--c-ink)}
.feature-group-head .group-sub{font-size:var(--fs-desc);color:var(--c-faint);margin-left:auto;text-align:right}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.feature-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:14px;padding:16px 18px;display:flex;align-items:flex-start;gap:10px;transition:transform .25s,box-shadow .25s,border-color .25s}
.feature-item:hover{transform:translateY(-2px);box-shadow:0 10px 24px -10px rgba(0,0,0,.1);border-color:rgba(var(--accent-rgb),.4)}
.feature-item svg{flex-shrink:0;width:18px;height:18px;color:var(--accent);margin-top:2px}
.feature-item span{font-size:var(--fs-feature);color:var(--c-text);line-height:1.5}

/* ===== L4 优势/价值卡 ===== */
.value-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card);padding:30px 26px;transition:transform .3s,box-shadow .3s}
.value-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.value-icon{width:46px;height:46px;border-radius:12px;background:rgba(var(--accent-rgb),.1);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.value-icon svg{width:22px;height:22px}
.value-card h4{font-size:var(--fs-card-h4);font-weight:700;color:var(--c-ink);margin-bottom:8px}
.value-card p{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.65}

/* 痛点清单 */
.pain-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pain-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:16px;padding:22px 24px;display:flex;gap:14px;align-items:flex-start}
.pain-icon{flex-shrink:0;width:34px;height:34px;border-radius:10px;background:#fef2f2;color:#ef4444;display:flex;align-items:center;justify-content:center}
.pain-item h4{font-size:var(--fs-body);font-weight:700;color:var(--c-ink);margin-bottom:4px}
.pain-item p{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.6}

/* ===== L4 Notice / 流程 / 时间线 ===== */
.notice-section{padding:24px 0 0}
.notice{background:#fffbeb;border:1px solid #fde68a;border-radius:16px;padding:20px 24px;display:flex;gap:14px;align-items:flex-start;max-width:920px;margin:0 auto}
.notice-icon{flex-shrink:0;width:28px;height:28px;border-radius:8px;background:#f59e0b;color:#fff;display:flex;align-items:center;justify-content:center;font-size:var(--fs-body);font-weight:800}
.notice p{font-size:var(--fs-notice);color:#92400e;line-height:1.7}
.notice p strong{color:#78350f}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.process-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:18px;padding:28px 24px;position:relative;transition:transform .3s,box-shadow .3s}
.process-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px -14px rgba(0,0,0,.12)}
.process-step{width:42px;height:42px;border-radius:12px;background:var(--c-badge-bg);color:var(--c-badge-text);display:flex;align-items:center;justify-content:center;font-size:var(--fs-step);font-weight:800;margin-bottom:18px}
.process-card h4{font-size:var(--fs-card-h4);font-weight:700;color:var(--c-ink);margin-bottom:8px}
.process-card p{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.6}
/* 交付时间线（软件定制） */
.timeline{position:relative;max-width:860px;margin:0 auto}
.timeline::before{content:'';position:absolute;left:23px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,rgba(var(--accent-rgb),.6),rgba(var(--accent-rgb),.08))}
.tl-item{position:relative;padding:0 0 34px 72px}
.tl-item:last-child{padding-bottom:0}
.tl-step{position:absolute;left:0;top:0;width:48px;height:48px;border-radius:14px;background:rgba(var(--accent-rgb),.1);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:var(--fs-body)}
.tl-item h4{font-size:var(--fs-card-h4);font-weight:800;color:var(--c-ink);margin-bottom:6px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-item h4 .tl-deliver{font-size:var(--fs-tag);font-weight:600;color:var(--accent);background:rgba(var(--accent-rgb),.1);padding:3px 10px;border-radius:100px}
.tl-item p{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.65;max-width:640px}

/* ===== L4 报价汇总表 ===== */
.table-wrap{overflow-x:auto;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card)}
table.price-table{width:100%;border-collapse:collapse;min-width:720px}
.price-table th{background:var(--c-badge-bg);color:var(--c-badge-text);font-size:var(--fs-desc);font-weight:700;text-align:left;padding:14px 20px;white-space:nowrap}
.price-table td{font-size:var(--fs-desc);color:var(--c-text);padding:14px 20px;border-top:1px solid var(--c-border-inner);line-height:1.55}
.price-table td.pt-name{font-weight:700;color:var(--c-ink);white-space:nowrap}
.price-table td.pt-price{font-weight:800;color:var(--c-primary);white-space:nowrap}
.price-table tr:hover td{background:#fafbfe}

/* ===== L4 FAQ ===== */
.faq-section{padding:72px 0;background:#fff}
.faq-inner{max-width:820px;margin:0 auto}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--c-border);border-radius:14px;overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:#c7d2fe}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:var(--fs-faq-q);font-weight:600;color:var(--c-ink);text-align:left;font-family:inherit;transition:background .2s}
.faq-question:hover{background:var(--c-bg)}
.faq-icon{flex-shrink:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;transition:transform .3s ease;color:var(--c-faint);margin-left:12px}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--c-primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 24px 20px;font-size:var(--fs-nav);color:var(--c-text);line-height:1.7}

/* ===== L4 表单 ===== */
.contact-layout{display:grid;grid-template-columns:1fr 1.4fr;gap:32px;align-items:start}
.contact-info-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card);padding:32px 28px}
.contact-info-card h3{font-size:1.15rem;font-weight:800;margin-bottom:8px}
.contact-info-card>p{font-size:var(--fs-desc);color:var(--c-muted);margin-bottom:24px;line-height:1.65}
.ci-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--c-border-inner)}
.ci-icon{flex-shrink:0;width:40px;height:40px;border-radius:11px;background:rgba(var(--accent-rgb),.1);color:var(--accent);display:flex;align-items:center;justify-content:center}
.ci-icon svg{width:19px;height:19px}
.ci-row .ci-label{font-size:var(--fs-tag);color:var(--c-faint);text-transform:uppercase;letter-spacing:.05em}
.ci-row .ci-value{font-size:var(--fs-body);font-weight:700;color:var(--c-ink)}
.ci-row a.ci-value:hover{color:var(--c-primary)}
.form-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card);padding:32px 28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:var(--fs-desc);font-weight:600;color:var(--c-ink)}
.field label em{color:#ef4444;font-style:normal}
.field input,.field select,.field textarea{font-family:inherit;font-size:var(--fs-desc);color:var(--c-ink);background:var(--c-bg);border:1.5px solid var(--c-border);border-radius:10px;padding:11px 14px;transition:border-color .2s,box-shadow .2s;outline:none;width:100%}
.field textarea{resize:vertical;min-height:110px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(99,102,241,.12);background:#fff}
.field .err{font-size:var(--fs-tag);color:#ef4444;display:none}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#ef4444}
.field.invalid .err{display:block}
.form-note{font-size:var(--fs-tag);color:var(--c-faint);margin-top:14px;line-height:1.6}
.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,80px);background:var(--c-ink);color:#fff;font-size:var(--fs-desc);font-weight:600;padding:13px 24px;border-radius:100px;box-shadow:0 12px 32px rgba(0,0,0,.22);opacity:0;transition:all .35s;z-index:300;display:flex;gap:8px;align-items:center}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

/* ===== L4 CTA Banner ===== */
.cta-banner{padding:80px 0;text-align:center;background:var(--grad-brand);color:#fff;border-radius:32px;margin:0 24px 80px}
.cta-banner-inner{max-width:600px;margin:0 auto;padding:0 24px}
.cta-banner h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;letter-spacing:-.01em;margin-bottom:16px}
.cta-banner p{font-size:1.05rem;opacity:.9;margin-bottom:32px;line-height:1.6}
.cta-banner-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--c-badge-text);padding:14px 36px;border-radius:12px;font-size:var(--fs-body);font-weight:700;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.cta-banner-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.cta-banner-sub{font-size:var(--fs-note);opacity:.75;margin-top:14px}

/* ===== L4 Footer ===== */
.footer{padding:60px 0 40px;background:#fff;border-top:1px solid var(--c-border-inner)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo{width:32px;height:32px;background:var(--grad-brand);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:var(--fs-nav);font-weight:800}
.footer-brand-name{font-size:var(--fs-brand);font-weight:700;color:var(--c-ink)}
.footer-desc{font-size:var(--fs-desc);color:var(--c-muted);line-height:1.7;max-width:300px}
.footer-contact{margin-top:18px;display:flex;flex-direction:column;gap:8px}
.footer-contact a,.footer-contact span{display:flex;align-items:center;gap:9px;font-size:var(--fs-desc);color:var(--c-muted);transition:color .2s}
.footer-contact a:hover{color:var(--c-primary)}
.footer-contact svg{flex-shrink:0;width:15px;height:15px;color:var(--c-faint)}
.footer-col h3{font-size:var(--fs-colhead);font-weight:700;color:var(--c-ink);text-transform:uppercase;letter-spacing:.04em;margin-bottom:20px}
.footer-col a{display:block;font-size:var(--fs-desc);color:var(--c-muted);padding:4px 0;transition:color .2s}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{margin-top:48px;padding-top:24px;border-top:1px solid var(--c-border-inner);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom span{font-size:var(--fs-colhead);color:var(--c-faint)}
.footer-bottom-links{display:flex;gap:20px}
.footer-bottom-links a{font-size:var(--fs-colhead);color:var(--c-faint);transition:color .2s}
.footer-bottom-links a:hover{color:var(--c-primary)}

/* ===== L4 返回顶部 ===== */
.backtotop{position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid var(--c-border);color:var(--c-text);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:all .25s;z-index:150;box-shadow:0 6px 20px rgba(0,0,0,.1)}
.backtotop.is-show{opacity:1;visibility:visible}
.backtotop:hover{color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-2px)}

/* ===== L4 简易占位 / 徽标条 ===== */
.placeholder-box{border:1.5px dashed #cbd5e1;border-radius:var(--radius-card);padding:48px 32px;text-align:center;background:rgba(var(--accent-rgb),.04)}
.placeholder-box h4{font-size:var(--fs-body);font-weight:700;color:var(--c-text);margin-bottom:8px}
.placeholder-box p{font-size:var(--fs-desc);color:var(--c-faint);max-width:460px;margin:0 auto;line-height:1.7}

/* ===== L5 页面级微调 ===== */
.biz-section{padding:64px 0}
.split-2{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius-card);padding:30px 26px}
.stat-item{text-align:center}
.stat-item b{display:block;font-size:1.7rem;font-weight:800;color:var(--c-ink);letter-spacing:-.02em}
.stat-item span{font-size:var(--fs-desc);color:var(--c-muted)}

/* ===== L6 响应式（集中管理） ===== */
@media (max-width:1024px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid.col-4{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(3,1fr)}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-layout{grid-template-columns:1fr}
  .split-2{grid-template-columns:1fr}
  .dropdown{min-width:380px}
}
@media (max-width:768px){
  .nav a:not(.nav-cta),.nav .nav-item{display:none}
  .mobile-menu-btn{display:block}
  .card-grid,.card-grid.col-2,.card-grid.col-4{grid-template-columns:1fr;max-width:460px;margin:0 auto}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:1fr}
  .pain-list{grid-template-columns:1fr}
  .cta-banner{margin:0 16px 60px;border-radius:24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .hero{padding:60px 0 40px}
  .page-hero{padding:44px 0 36px}
  .category-note{text-align:left}
  .form-grid{grid-template-columns:1fr}
  .stats-strip{grid-template-columns:repeat(2,1fr)}
  .mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:180;display:flex;background:#fff;border-top:1px solid var(--c-border);box-shadow:0 -6px 24px rgba(0,0,0,.08)}
  .mobile-bar a{flex:1;display:flex;align-items:center;justify-content:center;gap:7px;padding:13px 8px;font-size:var(--fs-desc);font-weight:700;color:var(--c-ink)}
  .mobile-bar a.mb-cta{background:var(--c-primary);color:#fff}
  .has-mobilebar{padding-bottom:52px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .pricing-card{padding:28px 20px}
  .faq-question{padding:16px 20px;font-size:var(--fs-nav)}
  .feature-grid{grid-template-columns:1fr}
  .dropdown{position:static;transform:none;opacity:1;visibility:hidden;display:none}
}

/* ===== 打印 ===== */
@page{size:A4;margin:0}
@media print{
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  html,body{background:var(--c-bg)}
  .header{position:static;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;border-bottom:1px solid var(--c-border)}
  .hero{padding:56px 0 36px}
  .section,.category{padding:40px 0}
  .card-grid{grid-template-columns:1fr!important;max-width:700px;margin:0 auto;gap:18px}
  .process-grid{grid-template-columns:repeat(2,1fr)!important;gap:16px}
  .pricing-card,.process-card,.faq-item,.notice,.category-head,.value-card,.feature-item{break-inside:avoid}
  .faq-answer{max-height:none!important}
  .cta-banner{margin:24px 0 32px;border-radius:20px}
  .footer{border-top:1px solid var(--c-border-inner)}
  .mobile-bar,.backtotop,.drawer-mask,.mobile-drawer{display:none!important}
}