/* ============================================
   Apple-Compliant Corporate Website
   — For Apple Developer Organization Enrollment
   Clean, professional, English-first, stable content
   ============================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"Noto Sans SC",sans-serif;color:#1d1d1f;background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit;transition:color .2s}
ul{list-style:none}
button,input,select,textarea{font:inherit;border:none;outline:none}
img{max-width:100%;display:block}

:root{
  --blue:#2563eb;
  --blue-light:#dbeafe;
  --teal:#0891b2;
  --green:#16a34a;
  --dark:#1d1d1f;
  --gray:#6b7280;
  --gray-light:#f3f4f6;
  --border:#e5e7eb;
  --white:#fff;
  --section-pad:100px 0;
}

/* ===== Container ===== */
.container{max-width:1080px;margin:0 auto;padding:0 28px}

/* ===== NAV ===== */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:100;padding:14px 0;transition:all .35s}
.navbar.scrolled{background:rgba(255,255,255,.97);backdrop-filter:blur(12px);box-shadow:0 1px 12px rgba(0,0,0,.08);padding:8px 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--dark)}
.navbar:not(.scrolled) .brand{color:#fff}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:8px;background:var(--blue);color:#fff;font-weight:900;font-size:18px}
.brand-name{letter-spacing:-.3px}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;cursor:pointer;padding:6px}
.hamburger span{display:block;width:22px;height:2px;background:var(--dark);transition:all .3s}
.navbar:not(.scrolled) .hamburger span{background:#fff}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:14px;font-weight:500;position:relative;padding:4px 0;color:var(--gray)}
.navbar:not(.scrolled) .nav-links a{color:rgba(255,255,255,.85)}
.navbar:not(.scrolled) .nav-links a:hover,
.navbar:not(.scrolled) .nav-links a.active{color:#fff}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--blue);transition:width .25s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.navbar:not(.scrolled) .nav-links a::after{background:#fff}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(160deg,#0a0e27 0%,#1a1f4e 50%,#0a0e27 100%);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(37,99,235,.18),transparent 60%),radial-gradient(ellipse at 70% 80%,rgba(168,85,247,.12),transparent 60%)}
.hero-body{position:relative;z-index:2;padding:0 24px;max-width:780px}
.hero-eyebrow{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:20px;font-weight:600}
.hero-title{font-size:60px;font-weight:900;color:#fff;line-height:1.08;margin-bottom:24px;letter-spacing:-1.5px}
.hero-sub{font-size:17px;color:rgba(255,255,255,.6);line-height:1.8;margin-bottom:44px;max-width:580px;margin-left:auto;margin-right:auto}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 36px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:all .25s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#1d4ed8;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:rgba(255,255,255,.8);border:1.5px solid rgba(255,255,255,.3)}
.btn-ghost:hover{border-color:#fff;color:#fff}

/* ===== Identity Strip ===== */
.identity-strip{background:var(--gray-light);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:28px 0}
.identity-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.id-item{text-align:center}
.id-label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--gray);margin-bottom:4px;font-weight:600}
.id-value{font-size:14px;font-weight:700;color:var(--dark)}

/* ===== Section Common ===== */
.section{padding:var(--section-pad)}
.section-label{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:var(--blue);font-weight:700;margin-bottom:12px}
.section-title{font-size:34px;font-weight:800;color:var(--dark);line-height:1.2;margin-bottom:16px;letter-spacing:-.5px}
.section-sub{font-size:16px;color:var(--gray);line-height:1.8;max-width:580px;margin-bottom:48px}
.bg-light{background:var(--gray-light)}

/* ===== Cards (Home) ===== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:var(--white);border-radius:18px;padding:36px 28px;box-shadow:0 2px 16px rgba(0,0,0,.06);border:1px solid var(--border);transition:all .3s}
.card:hover{box-shadow:0 8px 32px rgba(37,99,235,.1);transform:translateY(-4px)}
.card-icon{width:52px;height:52px;margin-bottom:20px}
.card-icon svg{width:100%;height:100%}
.card h3{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--dark)}
.card p{font-size:14px;color:var(--gray);line-height:1.8}

/* ===== About Two-Col ===== */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.two-col p{color:var(--gray);line-height:1.9;margin-bottom:16px}
.info-table-wrap{background:var(--gray-light);border-radius:16px;padding:4px;border:1px solid var(--border)}
.info-table{width:100%;border-collapse:collapse}
.info-table th{text-align:left;padding:14px 18px;font-size:13px;font-weight:600;color:var(--gray);background:rgba(0,0,0,.02);border-bottom:1px solid var(--border);width:40%}
.info-table td{padding:14px 18px;font-size:14px;color:var(--dark);border-bottom:1px solid var(--border)}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none}

/* ===== Pillars (Mission) ===== */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pillar{background:var(--white);border-radius:16px;padding:32px 24px;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.pillar-num{font-size:36px;font-weight:900;color:var(--blue-light);margin-bottom:12px;line-height:1}
.pillar h4{font-size:16px;font-weight:700;margin-bottom:8px}
.pillar p{font-size:13px;color:var(--gray);line-height:1.8}

/* ===== About Strip (Home) ===== */
.about-strip{background:var(--gray-light);padding:var(--section-pad)}
.about-inner{display:grid;grid-template-columns:1fr .6fr;gap:60px;align-items:center}
.about-text .section-label{margin-bottom:12px}
.about-text h2{font-size:30px;font-weight:800;margin-bottom:16px;line-height:1.25}
.about-text p{color:var(--gray);line-height:1.9;margin-bottom:14px}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.stat{background:var(--white);border-radius:14px;padding:24px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.stat-n{display:block;font-size:26px;font-weight:800;color:var(--blue);line-height:1.2}
.stat-l{font-size:12px;color:var(--gray);font-weight:600;text-transform:uppercase;letter-spacing:1px}

/* ===== Product Pages ===== */
.product-section{padding:80px 0}
.product-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.product-row.reverse{direction:rtl}
.product-row.reverse > *{direction:ltr}
.product-visual{display:flex;justify-content:center}
.app-mockup{text-align:center}
.mockup-icon{width:100px;height:100px;margin:0 auto 16px}
.mockup-icon svg{width:100%;height:100%}
.mockup-name{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:4px}
.mockup-badge{font-size:12px;color:var(--gray);font-weight:500}
.product-info .section-label{margin-bottom:10px}
.product-info h2{font-size:28px;font-weight:800;margin-bottom:14px}
.product-lead{font-size:16px;color:var(--gray);line-height:1.8;margin-bottom:24px}
.feature-list{margin-bottom:28px}
.feature-list li{position:relative;padding-left:24px;font-size:14px;color:var(--gray);line-height:1.9;margin-bottom:6px}
.ft-dot{position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--blue);display:inline-block}
.product-platforms{display:flex;gap:10px}
.platform-tag{display:inline-block;padding:6px 16px;border-radius:20px;background:var(--blue-light);color:var(--blue);font-size:13px;font-weight:600}

/* ===== Store Badges ===== */
.store-badges{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.store-badge{transition:opacity .2s;cursor:pointer}
.store-badge:hover{opacity:.8}

/* ===== Address Card ===== */
.address-section{padding:var(--section-pad)}
.address-card{background:var(--white);border-radius:18px;box-shadow:0 2px 16px rgba(0,0,0,.06);border:1px solid var(--border);overflow:hidden;display:grid;grid-template-columns:1fr 1fr 1fr}
.address-card.wide{grid-template-columns:1fr 1fr 1fr}
.address-block{padding:32px 28px;border-right:1px solid var(--border)}
.address-block:last-child{border-right:none}
.address-block h4{font-size:13px;text-transform:uppercase;letter-spacing:1.5px;color:var(--blue);margin-bottom:10px;font-weight:700}
.address-block p,.address-block address{font-size:14px;color:var(--dark);line-height:1.8;font-style:normal}
.address-block a{color:var(--blue)}
.address-block a:hover{text-decoration:underline}

/* ===== Contact Page ===== */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.contact-details .section-label{margin-bottom:10px}
.contact-details h2{font-size:28px;font-weight:800;margin-bottom:6px}
.contact-cn{font-size:15px;color:var(--gray);margin-bottom:28px}
.detail-items{display:flex;flex-direction:column;gap:22px}
.detail-item{display:flex;gap:16px;align-items:flex-start}
.detail-icon{width:40px;height:40px;flex-shrink:0;color:var(--blue)}
.detail-icon svg{width:100%;height:100%}
.detail-item h4{font-size:14px;font-weight:700;margin-bottom:2px;color:var(--dark)}
.detail-item p,.detail-item address{font-size:14px;color:var(--gray);line-height:1.7;font-style:normal}

/* Contact Form */
.contact-form-panel{background:var(--gray-light);border-radius:18px;padding:36px 28px;border:1px solid var(--border)}
.contact-form-panel h3{font-size:20px;font-weight:700;margin-bottom:24px}
.field{margin-bottom:18px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--dark);margin-bottom:6px}
.req{color:#ef4444}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:14px;background:#fff;transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.field textarea{resize:vertical;min-height:110px}
.btn-full{width:100%}
.form-thanks{text-align:center;padding:36px 0}
.thanks-check{width:56px;height:56px;margin:0 auto 16px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700}

/* ===== Legal Block (Contact) ===== */
.legal-block{background:var(--white);border-radius:14px;padding:32px;border:1px solid var(--border);box-shadow:0 2px 8px rgba(0,0,0,.04)}
.legal-block h3{font-size:16px;font-weight:700;margin-bottom:14px;color:var(--dark)}
.legal-block p{font-size:14px;color:var(--gray);line-height:1.8;margin-bottom:8px}

/* ===== Page Hero ===== */
.page-hero{background:linear-gradient(160deg,#0a0e27,#1a1f4e);padding:150px 0 72px;text-align:center;color:#fff}
.page-hero .hero-eyebrow{font-size:12px;letter-spacing:3px;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:14px;font-weight:600}
.page-hero h1{font-size:46px;font-weight:900;line-height:1.1;margin-bottom:14px;letter-spacing:-1px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.6);max-width:540px;margin:0 auto;line-height:1.7}

/* ===== Footer ===== */
.footer{background:#0a0e27;color:rgba(255,255,255,.7);padding:56px 0 0}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1.5fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;align-items:flex-start;gap:12px}
.footer-brand .brand-mark{background:var(--blue);color:#fff;width:36px;height:36px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;flex-shrink:0;margin-top:2px}
.footer-legal{font-weight:700;font-size:14px;color:rgba(255,255,255,.9);margin-bottom:2px}
.footer-cn{font-size:12px;color:rgba(255,255,255,.4)}
.footer-nav{display:flex;flex-direction:column;gap:10px}
.footer-nav a{font-size:14px;color:rgba(255,255,255,.6);transition:color .2s}
.footer-nav a:hover{color:#fff}
.footer-addr{font-size:13px;line-height:1.8;color:rgba(255,255,255,.45)}
.footer-copy{text-align:center;padding:20px 0;font-size:12px;color:rgba(255,255,255,.25);border-top:1px solid rgba(255,255,255,.06)}

/* ===== Text Center util ===== */
.text-center{text-align:center}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .cards,.identity-grid{grid-template-columns:repeat(2,1fr)}
  .two-col,.product-row,.contact-layout{grid-template-columns:1fr}
  .product-row.reverse{direction:ltr}
  .pillars{grid-template-columns:repeat(2,1fr)}
  .address-card,.address-card.wide{grid-template-columns:1fr}
  .address-block{border-right:none;border-bottom:1px solid var(--border)}
  .address-block:last-child{border-bottom:none}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .hamburger{display:flex}
  .nav-links{position:fixed;top:0;right:-100%;width:260px;height:100vh;background:#fff;flex-direction:column;padding:72px 28px;gap:20px;transition:right .35s;box-shadow:-4px 0 24px rgba(0,0,0,.1);z-index:99}
  .nav-links.open{right:0}
  .nav-links a,.navbar:not(.scrolled) .nav-links a{color:var(--dark)!important;font-size:16px}
  .hero-title{font-size:34px}
  .page-hero h1{font-size:32px}
  .section-title{font-size:26px}
  .cards,.identity-grid,.pillars{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .about-inner{grid-template-columns:1fr}
  .about-stats{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
}