/* ═══════════════════════════════════════════════════════════════
   蓝色航线 · 腾讯电子签 · 2026 极简微质感设计系统
   ═══════════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  /* Brand */
  --brand:#0552F0;
  --brand-dark:#0340C8;
  --brand-light:#EEF3FF;
  --brand-muted:#B8CCFF;
  --teal:#00B2B2;
  --teal-light:#E6F8F8;

  /* Neutrals */
  --ink:#0D0D14;
  --ink-2:#3C3C4E;
  --ink-3:#6E6E82;
  --ink-4:#A8A8BE;
  --line:#E4E6F0;
  --surface:#F6F7FB;
  --white:#FFFFFF;

  /* Accents */
  --green:#12B76A;
  --amber:#F59E0B;
  --purple:#7C3AED;
  --red:#EF4444;

  /* Tokens */
  --radius-sm:6px;
  --radius:10px;
  --radius-lg:16px;
  --radius-xl:24px;
  --header-h:70px;

  /* Shadows - 微质感 */
  --shadow-xs:0 1px 2px rgba(0,0,0,.04);
  --shadow-sm:0 2px 8px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 8px 24px rgba(5,82,240,.10),0 2px 6px rgba(0,0,0,.04);
  --shadow-lg:0 20px 48px rgba(5,82,240,.14),0 4px 12px rgba(0,0,0,.06);
  --shadow-glow:0 0 0 3px rgba(5,82,240,.15);

  /* Transitions */
  --ease:cubic-bezier(.25,.46,.45,.94);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
}

/* ── Dark mode ── */
@media(prefers-color-scheme:dark){
  :root{
    --ink:#F0F0F8;--ink-2:#C8C8D8;--ink-3:#8888A0;--ink-4:#5555680;
    --line:#2A2A3A;--surface:#121220;--white:#1A1A2E;
    --brand-light:#1A2550;--shadow-md:0 8px 24px rgba(0,0,0,.4);
    --shadow-lg:0 20px 48px rgba(0,0,0,.5);
  }
  body{background:#0C0C1A}
  header{background:rgba(18,18,34,.92)!important;border-bottom-color:#1E1E30!important}
  .tab-wrap{background:#121220!important;border-bottom-color:#1E1E30!important}
  .card,.ct-card,.ct-promise,.module-box,.addon-box,.saas-card{background:#1A1A2E!important;border-color:#2A2A3A!important}
}

/* ── Base ── */
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--surface);min-height:100vh;padding-top:var(--header-h);
  font-size:15px;line-height:1.6;
}

/* ══ HEADER ══ */
header{
  position:fixed;top:0;left:0;right:0;z-index:500;
  height:var(--header-h);
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid rgba(228,230,240,.7);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;
  transition:box-shadow .3s var(--ease);
}
header.scrolled{box-shadow:var(--shadow-sm)}
.logo{display:flex;align-items:center;text-decoration:none;gap:10px}
.logo img{height:40px;max-width:280px;object-fit:contain}
.logo-fallback{display:flex;align-items:center;gap:10px}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,#0552F0,#00B2B2);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:900;flex-shrink:0}
.logo-text{line-height:1.2}
.logo-text strong{display:block;font-size:15px;font-weight:800;color:var(--ink)}
.logo-text span{font-size:11px;color:var(--ink-3);letter-spacing:.3px}

.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none;padding:7px 14px;border-radius:var(--radius-sm);transition:background .15s,color .15s;white-space:nowrap}
.nav-link:hover{background:var(--brand-light);color:var(--brand)}
.nav-link.active{color:var(--brand);background:var(--brand-light)}
.nav-cta{
  margin-left:8px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:700;
  padding:9px 22px;border-radius:var(--radius);text-decoration:none;
  transition:background .2s var(--ease),box-shadow .2s;white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);box-shadow:0 4px 16px rgba(5,82,240,.35)}

/* ══ HERO ══ */
.hero{
  background:linear-gradient(135deg,#060B28 0%,#0552F0 55%,#0099FF 100%);
  color:#fff;text-align:center;padding:72px 24px 80px;position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 60% at 50% 100%,rgba(0,178,178,.18) 0%,transparent 70%);
  pointer-events:none;
}
.hero-pill{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  backdrop-filter:blur(8px);
  font-size:13px;font-weight:500;padding:5px 16px;border-radius:20px;margin-bottom:22px;
  color:rgba(255,255,255,.9);
}
.hero-pill-dot{width:6px;height:6px;background:#4ADE80;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.hero h1{
  font-size:clamp(26px,5vw,52px);font-weight:900;line-height:1.18;
  margin-bottom:18px;letter-spacing:-.5px;
}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7DD3FC,#38BDF8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:clamp(14px,2vw,17px);opacity:.82;max-width:520px;margin:0 auto 36px;line-height:1.7}
.hero-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-primary{
  background:#fff;color:var(--brand);font-weight:800;font-size:15px;
  padding:13px 32px;border-radius:var(--radius);text-decoration:none;
  transition:box-shadow .25s,transform .15s var(--ease-spring);
}
.btn-primary:hover{box-shadow:0 6px 24px rgba(0,0,0,.22);transform:translateY(-1px)}
.btn-ghost{
  background:transparent;color:#fff;font-size:15px;font-weight:500;
  padding:13px 32px;border-radius:var(--radius);border:1.5px solid rgba(255,255,255,.5);
  text-decoration:none;transition:background .2s,border-color .2s;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.8)}
.hero-stats{
  display:flex;justify-content:center;gap:48px;margin-top:48px;
  border-top:1px solid rgba(255,255,255,.15);padding-top:32px;flex-wrap:wrap;
}
.hero-stat-num{font-size:30px;font-weight:900;margin-bottom:4px}
.hero-stat-label{font-size:13px;opacity:.72}

/* ══ TAB NAV ══ */
.tab-wrap{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  position:sticky;top:var(--header-h);z-index:400;
}
.tab-nav{display:flex;max-width:960px;margin:0 auto;padding:0 16px;gap:0;overflow-x:auto;scrollbar-width:none}
.tab-nav::-webkit-scrollbar{display:none}
.tab-btn{
  flex-shrink:0;padding:16px 22px;font-size:14px;font-weight:600;
  color:var(--ink-3);border:none;background:none;cursor:pointer;
  border-bottom:2.5px solid transparent;margin-bottom:-1px;
  transition:color .2s,border-color .2s;white-space:nowrap;
}
.tab-btn:hover{color:var(--brand)}
.tab-btn.active{color:var(--brand);border-bottom-color:var(--brand)}

/* ══ TAB PANELS ══ */
.tab-panel{display:none;padding:52px 20px 72px}
.tab-panel.active{display:block}
.container{max-width:960px;margin:0 auto}

/* ══ SECTION HEADER ══ */
.sec-hd{margin-bottom:36px}
.sec-label{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;color:var(--brand);text-transform:uppercase;background:var(--brand-light);padding:3px 12px;border-radius:20px;margin-bottom:10px}
.sec-title{font-size:clamp(20px,3.5vw,30px);font-weight:900;color:var(--ink);margin-bottom:6px;letter-spacing:-.3px}
.sec-sub{font-size:14px;color:var(--ink-3)}

/* ══ CARDS - 通用微质感 ══ */
.card{
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);
  transition:box-shadow .25s var(--ease),transform .2s var(--ease),border-color .2s;
}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--brand-muted)}

/* ══ PRICE CARD ══ */
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.price-card{
  background:var(--white);border:1.5px solid var(--line);
  border-radius:var(--radius-lg);padding:28px 24px;position:relative;
  transition:box-shadow .25s var(--ease),transform .2s var(--ease),border-color .2s;
  overflow:hidden;
}
.price-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--line);transition:background .2s}
.price-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:var(--brand-muted)}
.price-card:hover::before{background:var(--brand)}
.price-card.featured{border-color:var(--brand);box-shadow:0 0 0 2px rgba(5,82,240,.12)}
.price-card.featured::before{background:linear-gradient(90deg,var(--brand),var(--teal))}
.price-badge{
  position:absolute;top:16px;right:16px;
  background:linear-gradient(135deg,var(--brand),#0099FF);
  color:#fff;font-size:11px;font-weight:700;padding:3px 12px;border-radius:20px;
}
.price-name{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:6px}
.price-val{font-size:36px;font-weight:900;color:var(--brand);line-height:1;margin:14px 0 6px;letter-spacing:-.5px}
.price-val small{font-size:14px;font-weight:400;color:var(--ink-3)}
.price-desc{font-size:13px;color:var(--ink-2);line-height:1.75;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.price-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.price-tag{font-size:12px;background:var(--brand-light);color:var(--brand);padding:3px 10px;border-radius:20px;font-weight:500}
.btn-card{display:block;text-align:center;padding:10px 16px;border-radius:var(--radius);font-size:14px;font-weight:700;text-decoration:none;transition:all .2s}
.btn-card-fill{background:var(--brand);color:#fff}
.btn-card-fill:hover{background:var(--brand-dark);box-shadow:0 4px 14px rgba(5,82,240,.35)}
.btn-card-line{border:1.5px solid var(--brand);color:var(--brand)}
.btn-card-line:hover{background:var(--brand-light)}

/* ══ ADDON / TABLE ══ */
.addon-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.addon-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xs)}
.addon-hd{padding:13px 20px;font-size:14px;font-weight:700;color:#fff;letter-spacing:.3px}
.addon-hd.c-teal{background:linear-gradient(90deg,var(--teal),#00D4D4)}
.addon-hd.c-blue{background:linear-gradient(90deg,var(--brand),#0099FF)}
.addon-hd.c-amber{background:linear-gradient(90deg,#D97706,var(--amber))}
.addon-hd.c-purple{background:linear-gradient(90deg,#6D28D9,var(--purple))}
.addon-row{display:flex;justify-content:space-between;align-items:center;padding:11px 20px;border-bottom:1px solid var(--line);font-size:14px}
.addon-row:last-child{border-bottom:none}
.addon-row:hover{background:var(--surface)}
.addon-label{color:var(--ink-2);font-weight:500}
.addon-price{color:var(--brand);font-weight:700;white-space:nowrap;margin-left:12px}
.data-table{width:100%;font-size:13px;border-collapse:collapse}
.data-table th{background:var(--brand-light);color:var(--brand);font-weight:700;padding:9px 16px;text-align:left;font-size:12px;letter-spacing:.3px}
.data-table td{padding:11px 16px;border-bottom:1px solid var(--line);color:var(--ink-2)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:var(--surface)}
.data-table .em{color:var(--brand);font-weight:700}

/* ══ MODULE ══ */
.module-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}
.module-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xs)}
.module-hd{padding:11px 18px;font-size:13px;font-weight:700;color:#fff;letter-spacing:.3px}
.module-row{display:flex;justify-content:space-between;align-items:flex-start;padding:11px 18px;border-bottom:1px solid var(--line);font-size:14px}
.module-row:last-child{border-bottom:none}
.module-row:hover{background:var(--surface)}
.module-name{color:var(--ink);flex:1}
.module-name small{display:block;font-size:11px;color:var(--ink-3);margin-top:2px}
.module-right{text-align:right;flex-shrink:0;margin-left:12px}
.module-price{font-weight:800;color:var(--brand);font-size:16px}
.module-unit{font-size:11px;color:var(--ink-3);margin-top:1px}

/* ══ CONTACT ══ */
.ct-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
.ct-col{display:flex;flex-direction:column;gap:16px}
.ct-intro{
  display:flex;align-items:center;gap:16px;
  background:linear-gradient(135deg,var(--brand-light),#EEF6FF);
  border:1px solid var(--brand-muted);border-radius:var(--radius-lg);padding:20px 22px;
}
.ct-avatar{
  width:52px;height:52px;border-radius:50%;border:2px solid var(--brand-muted);
  background:#fff;display:flex;align-items:center;justify-content:center;
  font-size:26px;flex-shrink:0;
}
.ct-name{font-size:15px;font-weight:800;color:var(--brand);margin-bottom:4px}
.ct-desc{font-size:13px;color:var(--ink-2);line-height:1.6}
.ct-card{
  display:flex;align-items:flex-start;gap:16px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:20px 22px;box-shadow:var(--shadow-xs);position:relative;
  transition:box-shadow .2s,border-color .2s;
}
.ct-card:hover{box-shadow:var(--shadow-md);border-color:var(--brand-muted)}
.ct-icon{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
}
.ct-body{flex:1;min-width:0}
.ct-label{font-size:11px;font-weight:700;color:var(--ink-3);text-transform:uppercase;letter-spacing:.8px;margin-bottom:5px}
.ct-val{font-size:15px;font-weight:800;color:var(--ink);display:block;text-decoration:none}
.ct-val:hover{color:var(--brand)}
.ct-val.phone{font-size:24px!important;color:var(--brand)!important;letter-spacing:1px}
.ct-val.email{font-size:14px!important;color:var(--brand)!important}
.ct-sub{font-size:12px;color:var(--ink-3);margin-top:2px}
.ct-badge{position:absolute;top:12px;right:14px;background:linear-gradient(135deg,var(--brand),#0099FF);color:#fff;font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px}
.ct-qr img{width:92px;height:92px;border-radius:10px;border:1px solid var(--line);display:block}
.ct-qr-label{font-size:11px;color:var(--ink-3);margin-top:5px;text-align:center}
.ct-2col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ct-promise{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-xs)}
.ct-promise-title{font-size:14px;font-weight:800;margin-bottom:16px;color:var(--ink)}
.ct-promise-list{display:flex;flex-direction:column;gap:13px}
.ct-promise-item{display:flex;align-items:flex-start;gap:10px}
.ct-check{font-size:16px;width:22px;flex-shrink:0;text-align:center;margin-top:1px}
.ct-pm-name{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:1px}
.ct-pm-desc{font-size:12px;color:var(--ink-3)}
.ct-stat{
  background:linear-gradient(135deg,var(--brand),#0099FF);
  border-radius:var(--radius-lg);padding:16px 20px;
  display:flex;align-items:center;gap:12px;color:#fff;
}
.ct-stat-num{font-size:28px;font-weight:900;line-height:1;flex-shrink:0}
.ct-stat-text{font-size:13px;line-height:1.5;opacity:.9}

/* ══ CTA BANNER ══ */
.cta-bar{
  background:linear-gradient(135deg,#060B28,#0552F0 60%,#00B2B2);
  color:#fff;text-align:center;padding:60px 24px;position:relative;overflow:hidden;
}
.cta-bar::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 80% 50%,rgba(255,255,255,.06) 0%,transparent 60%);
}
.cta-bar h2{font-size:clamp(22px,4vw,34px);font-weight:900;margin-bottom:12px;letter-spacing:-.3px}
.cta-bar p{font-size:15px;opacity:.82;margin-bottom:30px}
.cta-bar .btn-primary{display:inline-block;font-size:16px;padding:14px 38px}

/* ══ FOOTER ══ */
footer{background:#090E1F;color:rgba(255,255,255,.45);text-align:center;padding:28px 24px;font-size:13px;line-height:2}
footer a{color:rgba(255,255,255,.65);text-decoration:none;transition:color .15s}
footer a:hover{color:#fff}
footer .footer-divider{margin:0 8px;opacity:.3}

/* ══ FLOATING WIDGET ══ */
.widget{
  position:fixed;right:0;top:50%;transform:translateY(-50%);
  z-index:900;display:flex;flex-direction:column;gap:0;
  /* 整体容器不加宽度，让按钮自然伸展 */
}
.widget-btn{
  position:relative;
  display:flex;align-items:center;
  background:var(--brand);color:#fff;
  border:none;cursor:pointer;text-decoration:none;
  padding:0;overflow:hidden;
  transition:background .2s var(--ease),width .35s var(--ease),box-shadow .2s;
  outline:none;
}
.widget-btn:first-child{border-radius:12px 0 0 0}
.widget-btn:last-child{border-radius:0 0 0 12px}
.widget-btn + .widget-btn{border-top:1px solid rgba(255,255,255,.15)}

/* 图标区域 */
.widget-icon-wrap{
  width:52px;height:56px;display:flex;align-items:center;justify-content:center;
  font-size:22px;flex-shrink:0;
  transition:transform .3s var(--ease-spring);
}
/* 展开文字区域 */
.widget-label{
  width:0;overflow:hidden;white-space:nowrap;
  font-size:13px;font-weight:700;letter-spacing:.3px;
  transition:width .35s var(--ease),padding .35s var(--ease);
  padding-right:0;
}
/* hover时展开 */
.widget-btn:hover .widget-label{width:88px;padding-right:16px}
.widget-btn:hover .widget-icon-wrap{transform:scale(1.1)}
.widget-btn:hover{background:var(--brand-dark);box-shadow:-4px 0 20px rgba(5,82,240,.4)}

/* 微信绿 */
.widget-btn.wechat{background:#07C160}
.widget-btn.wechat:hover{background:#059A4D;box-shadow:-4px 0 20px rgba(7,193,96,.4)}
/* 电话橙 */
.widget-btn.phone{background:#F59E0B}
.widget-btn.phone:hover{background:#D97706;box-shadow:-4px 0 20px rgba(245,158,11,.4)}

/* tooltip/popup */
.widget-popup{
  position:absolute;right:60px;top:50%;transform:translateY(-50%);
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:16px;
  box-shadow:var(--shadow-lg);
  min-width:160px;text-align:center;
  opacity:0;pointer-events:none;
  transition:opacity .25s,right .25s var(--ease);
}
.widget-btn:hover .widget-popup{opacity:1;pointer-events:auto;right:66px}
.widget-popup img{width:120px;height:120px;border-radius:8px;display:block;margin:0 auto 8px}
.widget-popup p{font-size:12px;color:var(--ink-3);line-height:1.5}
.widget-popup a{font-size:13px;font-weight:700;color:var(--brand);text-decoration:none}

/* pulse animation on widget */
.widget-btn::after{
  content:'';position:absolute;left:0;top:0;width:4px;height:100%;
  background:rgba(255,255,255,.3);
  transform:scaleY(0);transform-origin:bottom;
  transition:transform .3s var(--ease);
}
.widget-btn:hover::after{transform:scaleY(1)}

/* ══ INFO BOX ══ */
.info-box{
  padding:18px 22px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-lg);font-size:13px;color:var(--ink-2);line-height:1.8;
  box-shadow:var(--shadow-xs);
}
.info-box .info-icon{font-size:16px;margin-right:6px}

/* ══ PAGE NAV (多页面导航活跃态) ══ */
.nav-link[data-page].active{color:var(--brand);background:var(--brand-light)}

/* ══ RESPONSIVE ══ */
@media(max-width:900px){
  header{padding:0 20px}
  .ct-grid{grid-template-columns:1fr}
  .addon-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  :root{--header-h:62px}
  .logo img{height:34px}
  .nav-links .nav-link{display:none}
  .ct-2col{grid-template-columns:1fr}
  .ct-badge{display:none}
  .hero{padding:56px 20px 64px}
  .hero-stats{gap:28px}
  .widget-btn:hover .widget-label{width:0;padding-right:0}
}
@media(max-width:480px){
  .tab-btn{padding:14px 14px;font-size:13px}
  .price-val{font-size:28px}
  .hero-stat-num{font-size:24px}
}