/* ===== Design Tokens ===== */
:root {
    --c-navy:    #0B1D3A;
    --c-blue:    #1565C0;
    --c-blue-l:  #1E88E5;
    --c-teal:    #00838F;
    --c-teal-l:  #00ACC1;
    --c-amber:   #EF6C00;
    --c-rose:    #C62828;
    --c-bg:      #F7F9FC;
    --c-surface: #EBF0F6;
    --c-white:   #FFFFFF;
    --c-text:    #1A2332;
    --c-muted:   #5F6B7A;
    --c-border:  #DCE3EB;
    --c-blue10:  #E8F1FD;
    --c-teal10:  #E0F7FA;
    --c-amber10: #FFF3E0;
    --c-rose10:  #FFEBEE;

    --shadow-xs: 0 1px 3px rgba(11,29,58,.06);
    --shadow-sm: 0 4px 12px rgba(11,29,58,.08);
    --shadow-md: 0 8px 30px rgba(11,29,58,.10);
    --shadow-lg: 0 16px 50px rgba(11,29,58,.14);

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;

    --ease: cubic-bezier(.4,0,.2,1);
    --ease-out: cubic-bezier(0,0,.2,1);
}

/* ===== Reset ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
    font-family:'Noto Sans SC',-apple-system,sans-serif;
    font-size:15px;line-height:1.75;color:var(--c-text);
    background:var(--c-bg);
    -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:'Noto Serif SC',serif;font-weight:700;color:var(--c-navy)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}

/* ===== Topbar ===== */
.topbar{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    background:rgba(255,255,255,.88);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(11,29,58,.06);
    transition:box-shadow .3s var(--ease);
}
.topbar.shadow{box-shadow:var(--shadow-xs)}
.topbar-inner{
    max-width:1140px;margin:0 auto;padding:0 24px;
    height:68px;display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
    width:38px;height:38px;display:flex;align-items:center;justify-content:center;
    font-size:22px;color:var(--c-white);background:var(--c-blue);
    border-radius:10px;flex-shrink:0;
}
.brand-info{display:flex;flex-direction:column}
.brand-name{font-family:'Noto Serif SC',serif;font-size:14px;font-weight:700;color:var(--c-navy)}
.brand-sub{font-size:11px;color:var(--c-muted)}

/* Nav */
.main-nav{display:flex;gap:4px}
.nav-item{
    padding:7px 16px;font-size:13px;font-weight:600;color:var(--c-muted);
    border-radius:20px;transition:all .25s var(--ease);
}
.nav-item:hover{color:var(--c-blue);background:var(--c-blue10)}
.nav-item.active{color:var(--c-blue);background:var(--c-blue10)}

.topbar-actions{flex-shrink:0;margin-left:auto}
.topbar-phone{
    font-size:13px;font-weight:700;color:var(--c-blue);
    padding:8px 18px;border:1.5px solid var(--c-blue10);border-radius:20px;
    transition:all .25s var(--ease);
}
.topbar-phone:hover{background:var(--c-blue);color:#fff}

/* Hamburger */
.hamburger{
    display:none;flex-direction:column;gap:5px;background:none;border:none;
    cursor:pointer;padding:6px;z-index:1001;
}
.hamburger span{display:block;width:22px;height:2px;background:var(--c-navy);border-radius:1px;transition:.3s}
.hamburger.on span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.on span:nth-child(2){opacity:0}
.hamburger.on span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ===== Hero ===== */
.hero-wrap{
    position:relative;background:linear-gradient(170deg,var(--c-navy) 0%,#132E50 50%,#1A3D60 100%);
    padding:120px 0 0;overflow:hidden;
}
.hero-grid{
    max-width:1140px;margin:0 auto;padding:0 24px 80px;
    display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
    position:relative;z-index:1;
}
.hero-eyebrow{font-size:13px;color:rgba(255,255,255,.6);letter-spacing:.08em;margin-bottom:12px}
.hero-heading{
    font-size:clamp(34px,5vw,58px);font-weight:900;color:#fff;
    line-height:1.2;margin-bottom:16px;
}
.hero-heading span{color:var(--c-teal-l)}
.hero-sub{font-size:16px;color:rgba(255,255,255,.7);margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-fill,.btn-ghost{
    display:inline-flex;padding:13px 28px;font-size:15px;font-weight:600;
    border-radius:28px;transition:all .25s var(--ease);cursor:pointer;
}
.btn-fill{background:var(--c-blue);color:#fff;border:2px solid var(--c-blue)}
.btn-fill:hover{background:var(--c-blue-l);border-color:var(--c-blue-l);transform:translateY(-2px);box-shadow:0 6px 24px rgba(21,101,192,.4)}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6)}

.hero-visual{display:flex;justify-content:flex-end}
.hero-img-frame{
    width:420px;height:420px;border-radius:var(--radius-xl);
    overflow:hidden;border:4px solid rgba(255,255,255,.15);
    box-shadow:0 20px 60px rgba(0,0,0,.3);
}
.hero-img{width:100%;height:100%;object-fit:cover}

.hero-wave{position:absolute;bottom:-2px;left:0;right:0;z-index:2}
.hero-wave svg{display:block;width:100%;height:60px}

/* ===== Sections ===== */
.block{padding:90px 0}
.block.alt{background:var(--c-surface)}

.block-head{text-align:center;margin-bottom:56px}
.block-chip{
    display:inline-block;padding:5px 18px;font-size:12px;font-weight:700;
    color:var(--c-blue);background:var(--c-blue10);border-radius:20px;
    margin-bottom:14px;letter-spacing:.06em;text-transform:uppercase;
}
.block-title{font-size:clamp(24px,3.5vw,36px);font-weight:900;margin-bottom:10px}
.block-desc{font-size:15px;color:var(--c-muted);max-width:500px;margin:0 auto}

/* Divider */
.divider{overflow:hidden;line-height:0}
.divider svg{display:block;width:100%;height:40px}

/* ===== Split Row ===== */
.split-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-row.reverse .split-img{order:2}
.split-row.reverse .split-cards{order:1}
.split-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.split-img img{width:100%;aspect-ratio:1;object-fit:cover}
.info-card{
    background:var(--c-white);border-radius:var(--radius);padding:24px;
    border:1px solid var(--c-border);transition:all .3s var(--ease);
    position:relative;overflow:hidden;
}
.info-card+.info-card{margin-top:14px}
.info-card::before{
    content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
    background:var(--c-blue);border-radius:3px 0 0 3px;transition:width .3s var(--ease);
}
.info-card:hover{box-shadow:var(--shadow-sm);border-color:transparent}
.info-card:hover::before{width:6px}
.info-num{font-family:'Noto Serif SC',serif;font-size:20px;font-weight:900;color:var(--c-blue);display:block;margin-bottom:8px}
.info-card h3{font-size:16px;margin-bottom:6px}
.info-card p{font-size:13px;color:var(--c-muted)}

/* ===== Glass Cards 2x2 ===== */
.grid-2x2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.glass-card{
    background:rgba(255,255,255,.7);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border:1px solid rgba(255,255,255,.8);
    border-radius:var(--radius-lg);padding:28px;
    display:flex;gap:18px;transition:all .3s var(--ease);
}
.glass-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);background:var(--c-white)}
.glass-icon{
    width:50px;height:50px;border-radius:var(--radius-sm);
    display:flex;align-items:center;justify-content:center;
    font-size:24px;flex-shrink:0;
}
.bg-blue{background:var(--c-blue10)}.bg-teal{background:var(--c-teal10)}
.bg-amber{background:var(--c-amber10)}.bg-rose{background:var(--c-rose10)}
.glass-body h3{font-size:16px;margin-bottom:6px}
.glass-body p{font-size:13px;color:var(--c-muted);margin-bottom:10px}
.glass-badge{
    display:inline-block;padding:3px 12px;font-size:11px;font-weight:700;
    color:var(--c-blue);background:var(--c-blue10);border-radius:12px;
}

/* ===== Device Stages ===== */
.device-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px}
.device-stage{
    background:var(--c-white);border-radius:var(--radius-lg);padding:32px 24px;
    text-align:center;border:1px solid var(--c-border);
    transition:all .3s var(--ease);position:relative;overflow:hidden;
}
.device-stage:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.stage-badge{
    display:inline-block;padding:6px 18px;font-family:'Noto Serif SC',serif;
    font-size:15px;font-weight:900;border-radius:16px;margin-bottom:16px;
}
.stage-1 .stage-badge{color:#2E7D32;background:#E8F5E9}
.stage-2 .stage-badge{color:var(--c-blue);background:var(--c-blue10)}
.stage-3 .stage-badge{color:#C62828;background:#FFEBEE}

.stage-ring{
    width:8px;height:8px;border-radius:50%;margin:0 auto 16px;position:relative;
}
.stage-1 .stage-ring{background:#4CAF50;box-shadow:0 0 0 6px rgba(76,175,80,.15)}
.stage-2 .stage-ring{background:var(--c-blue);box-shadow:0 0 0 6px rgba(21,101,192,.15)}
.stage-3 .stage-ring{background:#C62828;box-shadow:0 0 0 6px rgba(198,40,40,.15)}

.device-stage h3{font-size:18px;margin-bottom:6px}
.stage-risk{font-size:12px;color:var(--c-muted);margin-bottom:10px}
.device-stage>p{font-size:13px;color:var(--c-muted);margin-bottom:14px}
.device-stage ul{display:flex;flex-direction:column;gap:6px}
.device-stage li{font-size:12px;color:var(--c-muted);position:relative;padding-left:16px}
.device-stage li::before{content:'';position:absolute;left:0;top:7px;width:5px;height:5px;border-radius:50%;background:var(--c-border)}

.device-img-row{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.device-img-row img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ===== Service Grid ===== */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.service-item{
    background:var(--c-white);border-radius:var(--radius);padding:26px;
    border:1px solid var(--c-border);transition:all .3s var(--ease);
}
.service-item:hover{box-shadow:var(--shadow-sm);border-color:var(--c-blue)}
.svc-icon{font-size:28px;margin-bottom:12px}
.service-item h3{font-size:15px;margin-bottom:8px}
.service-item p{font-size:13px;color:var(--c-muted);line-height:1.8}

/* ===== Footer ===== */
.site-footer{background:var(--c-navy);color:rgba(255,255,255,.6);padding:56px 0 28px}
.footer-cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer-cols h4{color:#fff;font-size:15px;margin-bottom:12px}
.footer-about p{font-size:13px;line-height:1.8}
.footer-contact p{font-size:13px;margin-bottom:6px}
.footer-contact a{color:var(--c-teal-l);transition:color .2s}
.footer-contact a:hover{color:#fff}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.5);transition:color .2s}
.footer-links a:hover{color:var(--c-teal-l)}
.footer-legal{text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:12px}
.icp-link{color:rgba(255,255,255,.4);transition:color .2s}
.icp-link:hover{color:var(--c-teal-l)}
.sep{margin:0 10px;color:rgba(255,255,255,.15)}

/* ===== Scroll Top ===== */
.scroll-top{
    position:fixed;bottom:28px;right:28px;z-index:999;
    width:44px;height:44px;border-radius:50%;border:none;
    background:var(--c-blue);color:#fff;font-size:20px;cursor:pointer;
    opacity:0;visibility:hidden;transform:translateY(16px);
    transition:all .3s var(--ease);box-shadow:var(--shadow-md);
}
.scroll-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top:hover{background:var(--c-blue-l);transform:translateY(-3px)}

/* ===== Reveal Animation ===== */
.reveal-item{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal-item.in{opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media(max-width:960px){
    .hero-grid{grid-template-columns:1fr;text-align:center;padding-bottom:40px}
    .hero-visual{justify-content:center}
    .hero-img-frame{width:280px;height:280px}
    .hero-btns{justify-content:center}
    .split-row,.split-row.reverse{grid-template-columns:1fr}
    .split-row.reverse .split-img{order:1}
    .split-row.reverse .split-cards{order:2}
    .split-img img{aspect-ratio:4/3}
    .grid-2x2{grid-template-columns:1fr}
    .device-row{grid-template-columns:1fr}
    .service-grid{grid-template-columns:1fr 1fr}
    .footer-cols{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
    .main-nav{
        position:fixed;top:68px;left:0;right:0;background:rgba(255,255,255,.97);
        backdrop-filter:blur(16px);flex-direction:column;padding:16px;gap:2px;
        border-bottom:1px solid var(--c-border);box-shadow:var(--shadow-md);
        transform:translateY(-120%);transition:transform .3s var(--ease);z-index:1000;
    }
    .main-nav.open{transform:translateY(0)}
    .nav-item{padding:12px 16px;border-radius:10px;font-size:14px}
    .topbar-phone{display:none}
    .hamburger{display:flex}
    .brand-sub{display:none}
    .block{padding:50px 0}
    .service-grid{grid-template-columns:1fr}
    .footer-cols{grid-template-columns:1fr;gap:24px}
    .hero-img-frame{width:220px;height:220px}
}