:root{
  --bg:#05060a;
  --surface:#0b0d14;
  --surface-2:#11131c;
  --card:#141622;
  --border:#1f2537;
  --text:#f0f2f8;
  --muted:#94a3b8;
  --primary:#2563eb;
  --primary-hover:#1d4ed8;
  --accent:#f59e0b;
  --green:#10b981;
  --red:#ef4444;
  --radius-card:16px;
  --radius-sm:8px;
  --radius-xs:6px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
ul{list-style:none;padding:0;margin:0}
button{font-family:inherit;cursor:pointer;border:none}
.container{max-width:1280px;margin:0 auto;padding:0 20px}

header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,6,10,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.brand{
  display:flex;align-items:center;gap:12px;
}
.brand-avatar{
  width:38px;height:38px;border-radius:50%;
  background:#1e2130;
  object-fit:cover;
  border:2px solid var(--border);
}
.brand-text h1{
  margin:0;font-size:15px;font-weight:700;letter-spacing:.5px;
}
.brand-text span{
  font-size:12px;color:var(--muted);
}
.nav{display:flex;align-items:center;gap:28px}
.nav a{
  font-size:14px;color:var(--muted);transition:color .2s;
}
.nav a:hover,.nav a.active{color:var(--text)}
.header-actions{
  display:flex;align-items:center;gap:16px;
}
.guarantee{
  display:flex;align-items:center;gap:6px;
  font-size:13px;color:var(--muted);
}
.guarantee svg{
  width:18px;height:18px;color:var(--green);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:36px;padding:0 18px;
  border-radius:var(--radius-sm);
  font-size:14px;font-weight:500;
  background:var(--primary);color:#fff;
  transition:background .2s;
}
.btn:hover{background:var(--primary-hover)}
.btn-outline{
  background:transparent;border:1px solid var(--border);color:var(--text);
}
.btn-outline:hover{background:rgba(255,255,255,.05)}

.breadcrumb{
  padding:14px 0;font-size:13px;color:var(--muted);
}
.breadcrumb span{margin:0 6px}
.breadcrumb a:hover{color:var(--text)}

.hero{
  padding:28px 0 40px;
}
.hero-grid{
  display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:48px;align-items:center;
}
.hero-portrait{
  position:relative;
  background:linear-gradient(135deg,#141622 0%,#0b0d14 100%);
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--border);
}
.hero-portrait img{
  width:100%;height:auto;display:block;
  mask-image:linear-gradient(to bottom,#000 80%,transparent 100%);
  -webkit-mask-image:linear-gradient(to bottom,#000 80%,transparent 100%);
}
.hero-title{
  font-size:36px;font-weight:800;line-height:1.2;margin:0 0 12px;
}
.badge-row{
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
}
.badge{
  display:inline-flex;align-items:center;gap:4px;
  height:24px;padding:0 10px;
  border-radius:999px;
  font-size:12px;font-weight:600;
}
.badge-gold{
  color:var(--accent);
  border:1px solid rgba(245,158,11,.35);
  background:rgba(245,158,11,.08);
}
.badge-blue{
  color:#60a5fa;
  border:1px solid rgba(37,99,235,.4);
  background:rgba(37,99,235,.1);
}
.subtitle{
  color:var(--muted);font-size:15px;margin-bottom:18px;
}
.tag-row{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;
}
.tag{
  display:inline-flex;align-items:center;gap:5px;
  height:28px;padding:0 12px;
  border-radius:var(--radius-xs);
  background:var(--surface-2);
  border:1px solid var(--border);
  font-size:13px;color:var(--text);
}
.tag svg{
  width:14px;height:14px;color:var(--green);
}
.desc{
  color:var(--muted);font-size:14px;margin-bottom:22px;max-width:620px;
}
.tech-stack{
  display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;
}
.tech-pill{
  height:30px;padding:0 12px;
  border-radius:var(--radius-xs);
  background:rgba(37,99,235,.12);color:#93c5fd;
  border:1px solid rgba(37,99,235,.25);
  font-size:13px;display:flex;align-items:center;
}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px;
}
.stat-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:18px 16px;text-align:center;
}
.stat-num{
  font-size:22px;font-weight:800;color:var(--primary);
}
.stat-label{
  font-size:12px;color:var(--muted);margin-top:4px;
}

.features{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;
  margin:28px auto 40px;
}
.feature-card{
  flex:1 1 calc(25% - 12px);
  min-width:220px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:18px;
}
.feature-header{
  display:flex;align-items:center;gap:10px;margin-bottom:8px;
}
.feature-icon{
  width:36px;height:36px;border-radius:10px;
  background:var(--surface-2);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
}
.feature-title{font-size:15px;font-weight:700}
.feature-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.5}

.main-grid{
  display:grid;
  grid-template-columns:280px 1fr 320px;
  gap:24px;
  align-items:start;
}
.sticky-col{
  position:sticky;top:80px;align-self:start;
}

.side-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:18px;
}
.side-title{
  font-size:16px;font-weight:700;margin:0 0 14px;
}
.service-list li{
  display:flex;align-items:flex-start;gap:12px;
  padding:12px 0;border-bottom:1px solid var(--border);
}
.service-list li:last-child{border-bottom:none;padding-bottom:0}
.service-list li:first-child{padding-top:0}
.service-list-icon{
  width:34px;height:34px;border-radius:8px;
  background:var(--surface-2);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.service-list-text h4{margin:0;font-size:14px;font-weight:600}
.service-list-text p{margin:4px 0 0;font-size:12px;color:var(--muted);line-height:1.5}

.tabs{
  display:flex;gap:4px;
  border-bottom:1px solid var(--border);
  margin-bottom:20px;
}
.tab{
  padding:12px 16px;font-size:14px;color:var(--muted);
  background:transparent;border-radius:0;border-bottom:2px solid transparent;
  transition:all .2s;
}
.tab.active{color:var(--text);border-color:var(--primary);background:rgba(37,99,235,.08)}
.tab:hover{color:var(--text)}
.tab-content{display:none}
.tab-content.active{display:block}

.intro h3{margin:0 0 12px;font-size:18px}
.intro p{color:var(--muted);font-size:14px;margin:0 0 14px}
.check-list li{
  display:flex;align-items:flex-start;gap:8px;
  margin-bottom:10px;font-size:14px;color:var(--text);
}
.check-list svg{
  width:18px;height:18px;color:var(--green);flex-shrink:0;margin-top:2px;
}

.code-card{
  background:#0c0e15;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;margin-top:18px;
}
.code-header{
  display:flex;align-items:center;gap:8px;
  padding:12px 16px;border-bottom:1px solid var(--border);
}
.dot{width:10px;height:10px;border-radius:50%}
.dot-r{background:#ff5f57}
.dot-y{background:#febc2e}
.dot-g{background:#28c840}
.code-body{
  padding:16px;overflow-x:auto;
  font-family:"SF Mono",Menlo,Monaco,"Courier New",monospace;
  font-size:13px;line-height:1.7;
  white-space:pre;
}
.code-body .k{color:#c678dd}
.code-body .v{color:#d19a66}
.code-body .s{color:#98c379}
.code-body .n{color:#e06c75}
.code-body .c{color:#5c6370;font-style:italic}

.section-header{
  display:flex;align-items:center;justify-content:space-between;
  margin:34px 0 18px;
}
.section-title{font-size:18px;font-weight:700;margin:0}
.more-link{
  font-size:13px;color:var(--primary);display:flex;align-items:center;gap:4px;
}
.more-link:hover{text-decoration:underline}
.portfolio-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;
}
.portfolio-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.portfolio-thumb{
  height:160px;background:linear-gradient(135deg,#1e2335,#121520);
  border-bottom:1px solid var(--border);
  position:relative;overflow:hidden;
}
.portfolio-thumb img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;display:block;
}
.portfolio-thumb::before{display:none}
.portfolio-thumb svg{display:none}
.portfolio-body{padding:14px}
.portfolio-title{font-size:15px;font-weight:700;margin:0 0 8px}
.portfolio-tags{
  display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px;
}
.portfolio-tag{
  font-size:11px;color:var(--muted);
  background:var(--surface-2);padding:3px 8px;border-radius:4px;
}
.portfolio-meta{
  display:flex;align-items:center;gap:8px;
  font-size:12px;color:var(--muted);
}
.portfolio-meta .star{color:var(--accent)}

.reviews-summary{
  display:flex;align-items:center;gap:16px;margin-bottom:18px;
}
.rating-big{font-size:38px;font-weight:800;color:var(--accent);line-height:1}
.rating-text p{margin:0;font-size:13px;color:var(--muted)}
.stars{color:var(--accent);font-size:14px;letter-spacing:1px}
.review-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:14px;
}
.review-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:16px;
}
.review-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:8px;
}
.review-name{font-weight:700;font-size:14px}
.review-date{font-size:12px;color:var(--muted)}
.review-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.6}

.package-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:16px;
  margin-bottom:14px;
  position:relative;
}
.package-card.popular{
  border-color:rgba(37,99,235,.45);
  background:linear-gradient(180deg,rgba(37,99,235,.10),var(--card));
}
.package-header{
  display:flex;align-items:flex-start;justify-content:space-between;
  margin-bottom:10px;
}
.package-name{font-size:15px;font-weight:700}
.package-desc{font-size:12px;color:var(--muted);margin-bottom:10px}
.package-price{
  font-size:20px;font-weight:800;color:var(--text);
}
.package-price small{
  font-size:12px;color:var(--muted);font-weight:400;
}
.package-list li{
  display:flex;align-items:flex-start;gap:7px;
  font-size:13px;color:var(--muted);margin-bottom:7px;
}
.package-list svg{
  width:15px;height:15px;color:var(--green);flex-shrink:0;margin-top:2px;
}
.package-list .deliver svg{color:var(--accent)}
.package-btn{
  width:100%;margin-top:12px;
  height:38px;border-radius:var(--radius-sm);
  background:transparent;border:1px solid var(--border);
  color:var(--text);font-size:14px;font-weight:500;
}
.package-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.package-btn:hover{filter:brightness(1.1)}
.package-card{cursor:pointer;transition:border-color .15s,box-shadow .15s}
.package-card.selected{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary),0 0 18px rgba(37,99,235,.25)}
.package-check{
  position:absolute;top:-10px;left:16px;
  width:22px;height:22px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:none;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;box-shadow:0 2px 6px rgba(0,0,0,.3);
}
.package-card.selected .package-check{display:flex}
.package-card.selected .package-btn{background:var(--primary);border-color:var(--primary);color:#fff}
.package-card.selected .package-btn.primary{background:var(--primary)}
.selected-package{
  margin:0 0 12px;padding:10px 12px;border-radius:var(--radius-sm);
  background:rgba(37,99,235,.10);border:1px solid rgba(37,99,235,.35);
  font-size:13px;color:var(--muted);min-height:20px;line-height:1.5;
}
.selected-package b{color:var(--primary)}
.popular-badge{
  position:absolute;top:-1px;right:16px;
  transform:translateY(-50%);
  background:var(--primary);color:#fff;
  font-size:11px;font-weight:600;
  padding:3px 10px;border-radius:999px;
}

.contact-card{margin-bottom:14px}
.contact-card p{margin:0 0 12px;font-size:13px;color:var(--muted)}
.contact-row{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:10px;font-size:13px;
}
.contact-row span:last-child{color:var(--muted)}
.status-dot{
  display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--green);margin-right:5px;
  box-shadow:0 0 8px var(--green);
}
.contact-card .btn{width:100%;margin-top:8px}

.guarantee-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:10px;
}
.guarantee-item{
  display:flex;align-items:flex-start;gap:8px;
}
.guarantee-item svg{
  width:18px;height:18px;color:var(--green);flex-shrink:0;
}
.guarantee-item h5{margin:0;font-size:13px;font-weight:600}
.guarantee-item p{margin:2px 0 0;font-size:11px;color:var(--muted)}

footer{
  margin-top:50px;
  border-top:1px solid var(--border);
  background:var(--surface);
}
.footer-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:30px 0;
}
.footer-item{
  display:flex;align-items:center;gap:10px;
}
.footer-item svg{
  width:22px;height:22px;color:var(--primary);flex-shrink:0;
}
.footer-item h5{margin:0;font-size:14px;font-weight:700}
.footer-item p{margin:4px 0 0;font-size:12px;color:var(--muted)}

@media (max-width:1100px){
  .main-grid{grid-template-columns:1fr 260px}
  .left-sidebar{display:none}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero-portrait{max-width:300px;margin:0 auto}
  .stats{grid-template-columns:repeat(2,1fr)}
  .main-grid{grid-template-columns:1fr}
  .right-sidebar{position:static}
  .portfolio-grid,.review-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  .nav{display:none}
  .stats,.footer-inner{grid-template-columns:1fr}
  .hero-title{font-size:26px}
}

/* ===== 多页站点公共布局 ===== */
.section{padding:56px 0}
.section.alt{background:var(--surface)}
.section-head{margin-bottom:30px;max-width:760px}
.section-head .eyebrow{color:var(--primary);font-size:13px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase}
.section-head h2{font-size:26px;margin:8px 0 8px;font-weight:700}
.section-head p{color:var(--muted);margin:0}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);padding:22px;transition:border-color .15s,transform .15s}
.feature-card:hover{border-color:rgba(37,99,235,.5);transform:translateY(-3px)}
.feature-card .ic{width:40px;height:40px;border-radius:10px;background:rgba(37,99,235,.12);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.feature-card .ic svg{width:22px;height:22px}
.feature-card h4{margin:0 0 8px;font-size:16px}
.feature-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.page-hero{padding:60px 0 36px}
.page-hero .eyebrow{color:var(--primary);font-size:13px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase}
.page-hero h1{font-size:34px;margin:10px 0 12px;font-weight:800;line-height:1.25}
.page-hero p{color:var(--muted);max-width:720px;font-size:15px;margin:0}
.lead{color:var(--muted);font-size:15px;line-height:1.8}
.cta-band{background:linear-gradient(135deg,var(--primary),#1e40af);border-radius:var(--radius-card);padding:40px;text-align:center;margin-top:10px}
.cta-band h3{margin:0 0 10px;font-size:22px;color:#fff}
.cta-band p{margin:0 0 20px;color:rgba(255,255,255,.85)}
.cta-band .btn{background:#fff;color:var(--primary);font-weight:700}
.cta-band .btn:hover{filter:brightness(.95)}
.nav a.active{color:var(--text);font-weight:600}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-21px;height:2px;background:var(--primary)}
.nav a{position:relative}
.about-grid{display:grid;grid-template-columns:300px 1fr;gap:32px;align-items:start}
@media(max-width:760px){.about-grid{grid-template-columns:1fr}}
.about-portrait{width:100%;border-radius:var(--radius-card);border:1px solid var(--border);object-fit:cover}
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:7px;top:4px;bottom:4px;width:2px;background:var(--border)}
.timeline li{position:relative;margin-bottom:18px;list-style:none}
.timeline li::before{content:"";position:absolute;left:-23px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:2px solid var(--bg)}
.timeline b{color:var(--text)}
.tech-group{margin-bottom:22px}
.tech-group h4{margin:0 0 12px;font-size:15px;color:var(--text);display:flex;align-items:center;gap:8px}
.tech-group h4 .dot{width:8px;height:8px;border-radius:50%;background:var(--primary)}

/* QR modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(2,6,23,.78);
  display:none;align-items:center;justify-content:center;
  z-index:1000;padding:20px;backdrop-filter:blur(4px)
}
.modal-overlay.active{display:flex}
.qr-modal{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:28px 24px 22px;
  text-align:center;max-width:340px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.5);
  position:relative;animation:modalIn .25s ease
}
@keyframes modalIn{
  from{opacity:0;transform:translateY(12px) scale(.96)}
  to{opacity:1;transform:translateY(0) scale(1)}
}
.qr-modal img{
  width:240px;height:auto;border-radius:12px;
  border:1px solid var(--border);display:block;margin:0 auto 14px
}
.qr-modal p{
  margin:0;color:var(--muted);font-size:14px;line-height:1.6
}
.qr-modal p strong{
  color:var(--text);display:block;font-size:17px;margin-bottom:6px
}
.modal-close{
  position:absolute;top:10px;right:10px;width:32px;height:32px;
  background:transparent;border:1px solid var(--border);border-radius:8px;
  color:var(--muted);font-size:20px;line-height:30px;cursor:pointer;
  transition:.2s
}
.modal-close:hover{background:var(--border);color:var(--text)}