*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a237e;
  --primary-soft:#e3edff;
  --accent:#ffd700;
  --accent-soft:#fff8e1;
  --dark:#8b0000;
  --bg:#ffffff;
  --bg-alt:#f4f6fb;
  --text:#0d1137;
  --text-weak:#546e7a;
  --border:#d0d6e8;
  --gradient:linear-gradient(135deg,#1a237e,#283593 40%,#8b0000);
  --header-h:80px;
  --container:1240px;
  --radius:16px;
  --shadow:0 20px 60px rgba(13,17,55,.16);
  --font-display:Impact,'Arial Black',sans-serif;
  --font-body:'Microsoft YaHei','PingFang SC',sans-serif;
  --font-num:'Courier New',Consolas,monospace;
}
@media (max-width:960px){:root{--header-h:68px}}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:1rem;line-height:1.75;overflow-x:hidden;display:flex;flex-direction:column}
main{display:block;flex:1 0 auto}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:none}
button{cursor:pointer}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.15;letter-spacing:.01em}
h1{font-size:clamp(2.2rem,5vw,3.8rem)}
h2{font-size:clamp(1.6rem,3vw,2rem)}
h3{font-size:1.4rem}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
.container{width:min(var(--container),calc(100% - clamp(1rem,4vw,3rem)));margin-inline:auto}
.skip-link{position:fixed;top:.85rem;left:1rem;z-index:2000;background:var(--accent);color:var(--primary);padding:.7rem 1.1rem;border-radius:999px;font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.25);transform:translateY(-220%);transition:transform .25s ease}
.skip-link:focus{transform:translateY(0)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;padding:.65rem 1.4rem;border:2px solid transparent;border-radius:999px;font-weight:700;letter-spacing:.02em;text-align:center;transition:transform .3s ease,box-shadow .3s ease,background .3s ease,border-color .3s ease;color:var(--text)}
.btn--primary{background:var(--accent);color:var(--primary);border-color:var(--accent)}
.btn--primary:hover{background:#ffc107;border-color:#ffc107;transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,215,0,.35)}
.btn--outline{border:2px solid rgba(255,255,255,.85);color:#fff;background:transparent}
.btn--outline:hover{background:var(--accent);border-color:var(--accent);color:var(--primary);transform:translateY(-2px)}
.site-header{position:fixed;top:0;left:0;right:0;z-index:900;color:#fff;background:linear-gradient(180deg,rgba(13,17,55,.72),rgba(13,17,55,0) 92%);transition:background .4s ease,box-shadow .4s ease}
.site-header.is-scrolled{background:rgba(26,35,126,.97);box-shadow:0 10px 40px rgba(13,17,55,.28)}
.site-header[data-open]{background:rgba(13,17,55,.98);box-shadow:none}
.site-header__container{max-width:var(--container);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem);min-height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:.75rem}
.scroll-progress{position:absolute;left:0;bottom:0;width:100%;height:3px;transform:scaleX(var(--progress,0));transform-origin:0 50%;background:linear-gradient(90deg,var(--accent),#ffb300 60%,var(--dark));z-index:3;pointer-events:none}
.brand{display:flex;align-items:baseline;gap:.55rem;flex-shrink:0;line-height:1}
.brand__logo{font-family:var(--font-display);color:#fff;font-size:clamp(1.25rem,3.5vw,1.6rem);letter-spacing:.02em;transition:color .3s ease}
.brand:hover .brand__logo{color:var(--accent)}
.brand__mark{font-size:.7rem;font-weight:700;letter-spacing:.14em;color:var(--accent);border:1px solid rgba(255,215,0,.7);padding:.28em .55em;border-radius:2px;background:rgba(255,215,0,.08);transform:translateY(-2px)}
.nav{display:flex;align-items:center}
.nav__list{display:flex;align-items:center;gap:.15rem}
.nav__item{margin:0}
.nav__link{position:relative;display:block;padding:.6em .9em;border-radius:6px;color:#fff;font-weight:600;font-size:.95rem;letter-spacing:.02em;transition:color .25s ease,background .25s ease}
.nav__link:hover{color:var(--accent);background:rgba(255,215,0,.12)}
.nav__link[aria-current="page"]{color:var(--accent)}
.nav__link[aria-current="page"]::after{content:"";position:absolute;left:.9em;right:.9em;bottom:.22em;height:2px;background:var(--accent);border-radius:2px}
.header-cta{flex-shrink:0}
.nav-toggle{display:none;align-items:center;gap:.5rem;min-height:44px;padding:.4rem .8rem;border:1px solid rgba(255,255,255,.75);border-radius:8px;color:#fff;background:rgba(13,17,55,.25);transition:background .25s ease,border-color .25s ease}
.nav-toggle:hover{background:rgba(255,215,0,.15);border-color:var(--accent)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:5px;width:22px}
.nav-toggle__bar{display:block;width:100%;height:2px;border-radius:2px;background:currentColor;transition:transform .3s ease,opacity .3s ease}
.nav-toggle__label{font-size:.85rem;font-weight:700;letter-spacing:.1em}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .nav{position:fixed;top:var(--header-h);right:0;z-index:950;display:flex;align-items:stretch;width:min(88vw,420px);height:calc(100vh - var(--header-h));height:calc(100dvh - var(--header-h));background:linear-gradient(160deg,rgba(26,35,126,.98),rgba(13,17,55,.99));padding:2rem 1.5rem;border-left:1px solid rgba(255,215,0,.3);border-radius:18px 0 0 0;box-shadow:-20px 0 60px rgba(13,17,55,.4);transform:translateX(105%);visibility:hidden;opacity:0;transition:transform .35s ease,visibility .35s ease,opacity .35s ease;overflow-y:auto}
  .nav[data-open]{transform:translateX(0);visibility:visible;opacity:1}
  .nav__list{flex-direction:column;align-items:stretch;gap:.25rem;width:100%}
  .nav__item{width:100%}
  .nav__link{display:block;padding:.95rem 1rem;font-size:1.08rem;border-bottom:1px solid rgba(255,255,255,.1)}
  .nav__link[aria-current="page"]::after{left:1rem;right:auto;width:1.8rem;bottom:.35rem}
}
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--alt{background:var(--bg-alt)}
.section--narrow{max-width:860px;margin-inline:auto}
.page-hero{display:flex;align-items:flex-end;position:relative;overflow:hidden;min-height:72vh;padding:calc(var(--header-h) + 3rem) 0 4rem;background:var(--gradient);color:#fff}
.page-hero::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(115deg,transparent 22%,rgba(255,255,255,.08) 22%,rgba(255,255,255,.08) 36%,transparent 36%,transparent 58%,rgba(255,215,0,.14) 58%,rgba(255,215,0,.14) 68%,transparent 68%);pointer-events:none}
.page-hero::after{content:"";position:absolute;right:-10%;top:-30%;width:46%;height:120%;background:rgba(255,255,255,.06);transform:rotate(8deg);pointer-events:none}
.page-hero__inner{position:relative;z-index:2;width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:.4rem .7rem;margin-bottom:1.4rem;font-size:.875rem;color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb [aria-current="page"]{color:var(--accent)}
.kicker{display:flex;align-items:center;gap:.75rem;margin-bottom:.9rem;font-size:.78rem;font-weight:700;letter-spacing:.24em;color:var(--accent);text-transform:uppercase}
.kicker::before{content:"";width:40px;height:2px;background:var(--accent)}
.display-title{font-family:var(--font-display);font-size:clamp(2.6rem,8vw,6rem);font-weight:900;line-height:.95;letter-spacing:-.01em}
.lead{max-width:36rem;margin-top:1.2rem;font-size:1.1rem;color:rgba(255,255,255,.9)}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:1.5rem}
.grid__item{grid-column:span 4}
@media (max-width:960px){.grid__item{grid-column:span 6}}
@media (max-width:640px){.grid__item{grid-column:span 12}}
.index-map{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:2rem 0}
.index-map__item{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.1rem 1.25rem;background:var(--bg);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:12px;font-weight:700;color:var(--text);box-shadow:0 4px 14px rgba(13,17,55,.06);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.index-map__item:hover{transform:translateX(6px);border-left-color:var(--primary);box-shadow:var(--shadow)}
.index-map__item::after{content:"";width:8px;height:8px;border-right:2px solid var(--accent);border-top:2px solid var(--accent);transform:rotate(45deg);flex-shrink:0}
.card{position:relative;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;border-top:4px solid var(--primary);transition:transform .3s ease,box-shadow .3s ease}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card--primary{border-top-color:var(--primary)}
.card--accent{border-top-color:var(--accent)}
.card--dark{border-top-color:var(--dark)}
.stat{display:flex;flex-direction:column;gap:.25rem;padding:1.2rem;background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:8px}
.stat__num{font-family:var(--font-num);font-size:2.4rem;line-height:1;font-weight:700;color:var(--primary)}
.stat__label{font-size:.875rem;color:var(--text-weak);font-weight:600}
.skill-path{display:grid;gap:1rem;counter-reset:path}
.skill-path__item{position:relative;padding:1.3rem 1.4rem 1.3rem 4.6rem;background:var(--bg);border:1px solid var(--border);border-radius:12px;counter-increment:path;transition:border-color .3s ease,background .3s ease}
.skill-path__item::before{content:counter(path, decimal-leading-zero);position:absolute;left:1.2rem;top:1.2rem;font-family:var(--font-num);font-size:1.7rem;font-weight:700;color:var(--accent);line-height:1}
.skill-path__item:hover{background:var(--primary-soft);border-color:var(--primary)}
.tag{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .75rem;background:var(--primary-soft);color:var(--primary);border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.04em}
.tag--accent{background:var(--accent-soft);color:#7a5c00}
.tag--dark{background:rgba(139,0,0,.12);color:var(--dark)}
.image-placeholder{position:relative;overflow:hidden;min-height:180px;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary-soft),var(--accent-soft));border:1px solid var(--border);border-radius:var(--radius);color:var(--text-weak);font-weight:700;letter-spacing:.12em}
.image-placeholder::before{content:"";position:absolute;inset:0;z-index:0;background:repeating-linear-gradient(-45deg,rgba(26,35,126,.07) 0 10px,transparent 10px 20px)}
.image-placeholder > *{position:relative;z-index:1}
.site-footer{position:relative;overflow:hidden;background:var(--gradient);color:#fff;margin-top:clamp(4rem,10vw,7rem);padding:clamp(3rem,6vw,5rem) 0 2rem}
.footer-accent{position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 82% 12%,rgba(255,215,0,.18),transparent 32%),linear-gradient(115deg,rgba(255,255,255,.08),transparent 38%)}
.footer-container{position:relative;z-index:1;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.25fr;gap:2.5rem 3rem;margin-bottom:clamp(2rem,5vw,4rem)}
.footer-brand__logo{display:block;font-family:var(--font-display);font-size:2.2rem;color:#fff;line-height:1}
.footer-brand__mark{display:block;color:var(--accent);font-weight:700;letter-spacing:.12em;font-size:.85rem;margin-top:.6rem}
.footer-trust{margin-top:1.5rem;max-width:34rem;color:rgba(255,255,255,.75);font-size:.9rem;line-height:1.8;border-left:3px solid var(--accent);padding-left:1rem}
.footer-heading{font-family:var(--font-body);font-size:.9rem;font-weight:700;letter-spacing:.16em;color:var(--accent);text-transform:uppercase;margin-bottom:1.1rem}
.footer-nav__list{display:grid;gap:.55rem}
.footer-nav__link{display:inline-flex;align-items:center;gap:.55rem;color:rgba(255,255,255,.9);font-weight:600;transition:color .25s ease}
.footer-nav__link::before{content:"/";color:var(--accent);font-family:var(--font-num)}
.footer-nav__link:hover{color:var(--accent)}
.footer-contact p{color:rgba(255,255,255,.85);font-size:.9rem;line-height:1.9}
.footer-bottom{border-top:1px solid rgba(255,255,255,.18);padding-top:1.25rem;display:flex;flex-wrap:wrap;gap:.5rem 2rem;align-items:center;justify-content:space-between;color:rgba(255,255,255,.72);font-size:.875rem}
.footer-copy,.footer-icp{margin:0}
@media (max-width:760px){
  .footer-grid{grid-template-columns:1fr;gap:2rem}
  .footer-brand{margin-bottom:.5rem}
}
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease,visibility .7s ease;transition-delay:var(--reveal-delay,0ms)}
[data-reveal].is-revealed{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;transition-delay:0ms !important}
  .nav{transition-duration:.01ms !important}
  [data-reveal]{opacity:1;transform:none}
}