/* ============================================================
   白易通 GEO 门户 · portal.css
   ============================================================ */
:root{
  --red:#E60012;
  --red-deep:#B80010;
  --ink:#111A2C;
  --ink-2:#3A455C;
  --ink-3:#6B7690;
  --line:#E6EAF3;
  --bg:#FFFFFF;
  --alt:#F6F8FC;
  --navy:#0D1426;
  --radius:16px;
  --shadow:0 10px 30px rgba(17,26,44,.08);
  --shadow-h:0 18px 44px rgba(17,26,44,.14);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Kaku Pro GB","Microsoft YaHei",Segoe UI,Roboto,"Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--font);
  color:var(--ink);background:var(--bg);
  line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1160px,92%);margin-inline:auto}
.container-narrow{width:min(860px,92%)}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;border:none;cursor:pointer;
  padding:14px 28px;border-radius:999px;
  font-size:16px;font-weight:600;letter-spacing:.02em;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;box-shadow:0 8px 22px rgba(230,0,18,.35)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-ghost:hover{border-color:#fff}
.btn-light{background:#fff;color:var(--red-deep);box-shadow:0 8px 22px rgba(0,0,0,.18)}
.btn-sm{padding:9px 20px;font-size:14px}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{border-radius:10px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:19px;letter-spacing:.06em}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.05em}
.nav-links{display:flex;gap:26px;font-size:15px;color:var(--ink-2)}
.nav-links a{position:relative;padding:6px 2px;transition:color .15s}
.nav-links a:hover{color:var(--red)}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--red);border-radius:2px;transform:scaleX(0);transition:transform .2s;
}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.2s}
.nav-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-burger span:nth-child(2){opacity:0}
.nav-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  padding:158px 0 96px;background:
    radial-gradient(900px 480px at 88% -10%,rgba(230,0,18,.28),transparent 60%),
    radial-gradient(700px 420px at -6% 108%,rgba(230,0,18,.14),transparent 55%),
    linear-gradient(160deg,#0D1426 0%,#131B33 55%,#0D1426 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(720px 480px at 70% 20%,#000 0%,transparent 78%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:#FFB3BB;
  border:1px solid rgba(255,179,187,.4);padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.hero h1{font-size:clamp(30px,4.6vw,50px);line-height:1.28;font-weight:800;letter-spacing:.01em}
.hl{color:#FF3B4D;position:relative;white-space:nowrap}
.hero .lead{margin:22px 0 30px;color:#C4CBDC;font-size:17px;max-width:38em}
.hero .lead strong{color:#fff}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-tags{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;color:#AEB6C9;font-size:13.5px}
.hero-tags li::before{content:"";display:none}

/* ---------- ai demo card ---------- */
.hero-card{position:relative}
.ai-demo{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  border-radius:18px;backdrop-filter:blur(8px);
  box-shadow:0 24px 60px rgba(0,0,0,.42);overflow:hidden;
}
.ai-demo-head{
  display:flex;align-items:center;gap:7px;padding:13px 16px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.ai-demo-head em{margin-left:auto;font-style:normal;font-size:12px;color:#98A0B5;letter-spacing:.08em}
.dot{width:10px;height:10px;border-radius:50%}
.dot-r{background:#FF5F6D}.dot-y{background:#FFC44D}.dot-g{background:#4AD07C}
.ai-demo-body{padding:20px 18px 22px;display:grid;gap:14px}
.ai-user{
  justify-self:end;background:linear-gradient(135deg,var(--red),var(--red-deep));
  color:#fff;padding:10px 16px;border-radius:14px 14px 4px 14px;font-size:14px;max-width:88%;
}
.ai-bot{
  justify-self:start;display:flex;gap:10px;max-width:94%;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  padding:14px;border-radius:14px 14px 14px 4px;
}
.ai-bot img{border-radius:8px;flex:none;margin-top:2px}
.ai-answer{font-size:14px;color:#E8ECF5;line-height:1.75}
.ai-answer strong{color:#FF6B7A}
.ai-ref{margin-top:8px;font-size:12px;color:#8E97AC;border-top:1px dashed rgba(255,255,255,.16);padding-top:8px}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--alt)}
.sec-head{text-align:center;max-width:46em;margin:0 auto 52px}
.sec-head h2{font-size:clamp(24px,3.2vw,34px);font-weight:800;letter-spacing:.01em}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:16.5px}
.sec-head h2::after{
  content:"";display:block;width:56px;height:4px;border-radius:4px;margin:16px auto 0;
  background:linear-gradient(90deg,var(--red),#FF7A87);
}

/* ---------- cards ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h)}
.pain h3,.svc h3,.us h3{font-size:18.5px;margin-bottom:10px;font-weight:700}
.pain p,.svc p,.us p{color:var(--ink-2);font-size:15px}
.pain-ico{font-size:34px;margin-bottom:14px}
.svc header{display:flex;align-items:flex-start;gap:12px;margin-bottom:12px}
.svc-num{
  flex:none;font-style:italic;font-weight:800;font-size:15px;color:#fff;
  background:linear-gradient(135deg,var(--red),var(--red-deep));
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  box-shadow:0 6px 14px rgba(230,0,18,.3);
}
.us{position:relative;overflow:hidden}
.us::after{
  content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(230,0,18,.09),transparent 70%);
}
.us-ico{font-size:32px;margin-bottom:12px}

/* ---------- 范式迁移条 ---------- */
.shift{
  margin-top:44px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
  background:var(--navy);color:#fff;border-radius:var(--radius);padding:26px 34px;
  box-shadow:var(--shadow);
}
.shift-item em{display:inline-block;font-style:normal;font-size:12px;letter-spacing:.16em;color:#FF8A96;border:1px solid rgba(255,138,150,.45);padding:2px 10px;border-radius:999px;margin-bottom:8px}
.shift-item strong{font-size:16.5px;font-weight:600;color:#D8DEEA}
.shift-item-hl strong{color:#fff}
.shift-item-hl em{background:rgba(230,0,18,.25)}
.shift-arrow{font-size:26px;color:#FF5F6F}

/* ---------- steps ---------- */
.steps{list-style:none;display:grid;gap:16px;counter-reset:none;
  grid-template-columns:repeat(5,1fr)}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 20px;box-shadow:var(--shadow);
}
.step-no{
  display:grid;place-items:center;width:42px;height:42px;border-radius:50%;
  background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;font-weight:800;font-size:17px;
  margin-bottom:14px;box-shadow:0 8px 18px rgba(230,0,18,.3);
}
.step h3{font-size:17.5px;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-2)}
.step:not(:last-child)::after{
  content:"";position:absolute;top:50%;right:-11px;width:14px;height:2px;
  background:linear-gradient(90deg,var(--red),#FF8A96);
}

/* ---------- platforms ---------- */
.plat-grid{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.plat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow);transition:.2s;
}
.plat:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.plat strong{display:block;font-size:19px;color:var(--ink)}
.plat em{font-style:normal;display:block;margin-top:6px;font-size:13px;color:var(--ink-3)}
.plat-hl{border:1.5px solid var(--red);position:relative}
.plat-hl::before{
  content:"重点优化";position:absolute;top:-11px;right:14px;font-size:11.5px;color:#fff;
  background:linear-gradient(135deg,var(--red),var(--red-deep));padding:3px 10px;border-radius:999px;
}
.plat-note{margin-top:22px;text-align:center;font-size:12.5px;color:var(--ink-3)}

/* ---------- faq ---------- */
.faqs{display:grid;gap:14px}
.faq{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);overflow:hidden;
}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 22px;cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{font-size:16.5px;font-weight:700}
.faq summary i{
  flex:none;width:26px;height:26px;position:relative;border-radius:50%;
  background:var(--alt);transition:background .2s;
}
.faq summary i::before,.faq summary i::after{
  content:"";position:absolute;background:var(--red);border-radius:2px;transition:transform .25s;
}
.faq summary i::before{width:12px;height:2px;top:12px;left:7px}
.faq summary i::after{width:2px;height:12px;top:7px;left:12px}
.faq[open] summary i::after{transform:scaleY(0)}
.faq[open] summary i{background:#FFE3E6}
.faq p{padding:0 22px 20px;color:var(--ink-2);font-size:15px}

/* ---------- cta ---------- */
.cta-band{
  padding:88px 0;color:#fff;
  background:
    radial-gradient(640px 320px at 10% 0%,rgba(255,255,255,.1),transparent 60%),
    linear-gradient(135deg,var(--red-deep) 0%,var(--red) 55%,#FF3B4D 100%);
}
.cta-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cta-copy h2{font-size:clamp(22px,3vw,30px);line-height:1.4;font-weight:800}
.cta-copy p{margin-top:16px;color:rgba(255,255,255,.92);font-size:16px}
.cta-form{
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);
  border-radius:18px;padding:26px;display:grid;gap:14px;backdrop-filter:blur(6px);
}
.cta-form label{display:grid;gap:6px}
.cta-form span{font-size:13px;color:#FFE3E6;letter-spacing:.04em}
.cta-form input,.cta-form textarea{
  border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.92);
  border-radius:10px;padding:11px 13px;font-size:15px;font-family:inherit;color:var(--ink);
  resize:vertical;outline:none;
}
.cta-form input:focus,.cta-form textarea:focus{box-shadow:0 0 0 3px rgba(255,255,255,.4)}
.cta-form .btn{margin-top:4px}
.form-tip{font-size:12.5px;color:rgba(255,255,255,.8);text-align:center}

/* ---------- footer ---------- */
.site-foot{background:var(--navy);color:#AAB2C4;padding:64px 0 0;font-size:14.5px}
.foot-grid{display:grid;grid-template-columns:1.1fr 1.9fr;gap:44px;padding-bottom:44px}
.foot-brand{display:flex;gap:14px}
.foot-brand img{border-radius:10px;flex:none}
.foot-brand strong{display:block;color:#fff;font-size:17px;margin-bottom:8px}
.foot-brand p{max-width:26em}
.foot-links{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.foot-links h4{color:#fff;font-size:15px;margin-bottom:12px;letter-spacing:.06em}
.foot-links a{display:block;padding:4px 0;color:#AAB2C4;transition:color .15s}
.foot-links a:hover{color:#FF6B7A}
.foot-admin{font-size:12.5px;color:#5E6880 !important}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;font-size:12.5px;color:#7A8399}

/* ---------- reveal animation ---------- */
.reveal{opacity:1;transform:none;transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero{padding-top:132px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-card{max-width:520px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:not(:last-child)::after{display:none}
  .plat-grid{grid-template-columns:repeat(2,1fr)}
  .shift{grid-template-columns:1fr;text-align:center}
  .shift-arrow{transform:rotate(90deg)}
  .cta-wrap{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .nav-links{
    position:fixed;inset:72px 0 auto 0;background:#fff;flex-direction:column;gap:0;
    border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(17,26,44,.12);
    transform:translateY(-120%);transition:transform .25s ease;visibility:hidden;
  }
  .nav-open .nav-links{transform:none;visibility:visible}
  .nav-links a{padding:15px 6%;border-top:1px solid var(--line)}
  .nav-burger{display:block}
  .grid-3,.grid-4,.steps,.plat-grid{grid-template-columns:1fr}
  .section{padding:72px 0}
  .hero h1{font-size:clamp(26px,7.2vw,34px)}
  .hl{white-space:normal}
  .foot-links{grid-template-columns:1fr 1fr}
}

/* Company, local service and public methods */
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #f59b32;outline-offset:4px}
.skip-link{position:fixed;left:16px;top:-90px;z-index:100;background:#fff;color:var(--ink);padding:12px 20px;border:2px solid var(--red);border-radius:10px}
.skip-link:focus{top:10px}
.nav-links{gap:18px;font-size:14px}
.brand{flex-shrink:0}
.service-outline{padding:32px;border:1px solid #ffffff24;border-radius:20px;background:linear-gradient(145deg,#ffffff0d,#ffffff03);box-shadow:0 24px 70px #0004}
.service-outline .outline-label{font-size:12px;letter-spacing:.14em;color:#ff9ca6}
.service-outline h2{font-size:26px;margin:8px 0 22px}
.service-outline ol{list-style:none;display:grid;gap:22px}
.service-outline li{display:flex;gap:16px;align-items:flex-start}
.service-outline li>span{color:#ff8b98;font-size:13px;border:1px solid #ff8b9840;padding:3px 8px;border-radius:6px}
.service-outline strong{color:#fff;font-size:16px}
.service-outline li p{color:#b6c0d4;font-size:13px;margin-top:4px}
.service-outline>a{display:block;margin-top:28px;padding-top:18px;border-top:1px solid #ffffff20;color:#ffb3bb;font-size:14px}
.card-label{font-size:12px!important;letter-spacing:.08em;color:var(--red-deep)!important;margin-bottom:12px}
.text-link{display:inline-block;margin-top:18px;font-size:14px;color:var(--red-deep);font-weight:600}
.text-link:hover{text-decoration:underline}
#resources .grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.page-hero{padding:140px 0 70px}
.page-hero .lead{max-width:54em}
.content-layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:64px;padding-top:52px;padding-bottom:80px}
.article-nav{position:sticky;top:105px;align-self:start;border-left:2px solid var(--line);padding-left:20px}
.article-nav>p{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--ink-3);margin-bottom:14px}
.article-nav nav{display:grid;gap:12px;font-size:14px}
.article-nav a:hover{color:var(--red)}
.article-content{min-width:0;overflow-wrap:anywhere}
.article-content section{margin:36px 0 44px;scroll-margin-top:94px}
.article-content h1{font-size:clamp(28px,4vw,42px);line-height:1.35;margin-bottom:22px}
.article-content h2{font-size:clamp(22px,2.6vw,28px);line-height:1.4;margin-bottom:18px}
.article-content h3{margin-bottom:10px}
.article-content p{margin:14px 0;color:var(--ink-2)}
.article-content ol,.article-content ul{padding-left:24px;margin:16px 0}
.article-content li{margin:10px 0;color:var(--ink-2)}
.article-content a:not(.btn){color:var(--red-deep);text-decoration:underline;text-underline-offset:4px}
.article-content .faq p{margin:0}
.article-content .faq h3{margin:0}
.article-meta{font-size:13px;color:var(--ink-3)!important;letter-spacing:.02em}
.hero-meta{color:#c4cbdc!important;margin:16px 0}
.source-note{font-size:13px;color:var(--ink-3)!important}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px;margin:22px 0;background:#fff}
.table-scroll table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}
.table-scroll th{background:var(--alt);font-weight:700;color:var(--ink)}
.table-scroll th,.table-scroll td{padding:17px 18px;vertical-align:top;border-bottom:1px solid var(--line);min-width:140px}
.table-scroll tr:last-child td{border-bottom:0}
.table-scroll td{color:var(--ink-2)}
.related-links{display:flex;gap:14px;flex-wrap:wrap;margin:22px 0;font-size:14px}
.article-cta{padding:30px;background:var(--alt);border:1px solid var(--line);border-radius:16px;margin-top:48px}
.article-cta h2{font-size:24px}
.contact-phone{margin-top:26px;letter-spacing:.02em}
.contact-checklist{border:1px solid #ffffff50;border-radius:16px;padding:28px;background:#ffffff0e}
.contact-checklist h3{font-size:20px;margin-bottom:14px}
.contact-checklist ul{padding-left:20px;margin-bottom:20px}
.contact-checklist li{margin:10px 0}
.contact-checklist p,.contact-checklist a{font-size:14px;color:#fff}
.contact-checklist a{display:inline-block;margin-top:20px;text-decoration:underline;text-underline-offset:4px}
.guide-main{padding-top:120px}
@media(max-width:1050px){
.nav-links{position:fixed;inset:72px 0 auto 0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);box-shadow:0 18px 30px #111a2c1f;transform:translateY(-120%);transition:transform .25s ease;visibility:hidden}
.nav-open .nav-links{transform:none;visibility:visible}
.nav-links a{padding:15px 6%;border-top:1px solid var(--line)}
.nav-burger{display:block}
}
@media(max-width:760px){
.content-layout{grid-template-columns:1fr;gap:22px;padding-top:28px}
.article-nav{position:static;border:0;padding:16px;background:var(--alt);border-radius:12px}
.article-nav nav{display:flex;flex-wrap:wrap;gap:12px 18px}
.article-nav>p{margin-bottom:10px}
.page-hero{padding:120px 0 56px}
#resources .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:480px){
#resources .grid{grid-template-columns:1fr}
.nav-cta{gap:4px}.nav-cta .btn{padding:9px 12px;font-size:12px}
.brand-logo{width:36px;height:36px}.brand-text strong{font-size:17px}.brand-text em{font-size:10px}
.service-outline{padding:24px}
.article-cta{padding:22px}
.contact-phone{padding:14px 18px;font-size:15px}
}