/* ========== RESET & TOKENS ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:1rem;line-height:1.8;color:#1A1614;background:#F7F2E7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:#0A2463;text-decoration-thickness:1px;text-underline-offset:4px}
a:hover{color:#C8451B}
h1,h2,h3,h4{font-family:"Source Han Serif SC","Noto Serif SC","Songti SC",SimSun,serif;line-height:1.25;color:#0A2463;margin:0 0 .5em}
h1{font-size:clamp(3rem,9vw,9rem);font-weight:600}
h2{font-size:clamp(2rem,5vw,4.5rem);font-weight:700}
h3{font-size:clamp(1.25rem,2.4vw,2rem);font-weight:700}
p{margin:0 0 1em}
ul{list-style:none;margin:0;padding:0}
button{font:inherit;color:inherit;background:none;border:none;padding:0;cursor:pointer}
a:focus-visible,button:focus-visible{outline:2px solid #0A2463;outline-offset:3px;border-radius:2px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
:root{
  --bg:#F7F2E7;
  --royal:#0A2463;
  --royal-deep:#071A3F;
  --gold:#C9A063;
  --gold-light:#F1DFB4;
  --dark:#1A1614;
  --gray:#6B7280;
  --accent:#C8451B;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",SimSun,serif;
  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --max-w:1440px;
  --gold-line:rgba(201,160,99,.55);
  --shadow:0 8px 32px rgba(10,36,99,.08)
}
/* ========== BODY & MAIN CONTAINER ========== */
.page-content{width:100%;max-width:var(--max-w);margin:0 auto;padding:140px 32px 80px}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding-left:32px;padding-right:32px}
.section{padding:72px 0;position:relative}
.section-head{display:flex;align-items:baseline;gap:20px;margin-bottom:40px;border-bottom:1px solid var(--gold-line);padding-bottom:16px}
.section-index{font-family:var(--font-mono);font-size:.875rem;color:var(--gold);letter-spacing:.08em}
.section-title{margin:0}
.divider{height:1px;background:linear-gradient(90deg,var(--gold),rgba(201,160,99,.15));border:none;margin:48px 0}
/* ========== GRID ========== */
.grid{display:grid;gap:32px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
/* ========== BUTTONS ========== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.85em 1.7em;font-family:var(--font-sans);font-weight:600;font-size:.9375rem;line-height:1;color:#0A2463;background:transparent;border:1px solid var(--gold);border-radius:0;cursor:pointer;text-decoration:none;transition:background .2s,color .2s,border-color .2s,transform .2s;min-height:44px}
.btn:hover{transform:translateY(-2px);color:#0A2463;background:rgba(201,160,99,.12)}
.btn--primary{background:var(--royal);border-color:var(--royal);color:#F1DFB4}
.btn--primary:hover{background:var(--royal-deep);border-color:var(--royal-deep);color:#F1DFB4}
.btn--outline{border-color:var(--gold);color:var(--royal)}
.btn--outline:hover{background:rgba(201,160,99,.16)}
.btn--small{padding:.6em 1.2em;font-size:.8125rem;min-height:36px}
.btn--large{padding:1.15em 2.2em;font-size:1.0625rem}
/* ========== BREADCRUMB ========== */
.breadcrumb{font-family:var(--font-mono);font-size:.8125rem;color:var(--gray);display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:32px}
.breadcrumb a{color:var(--royal);text-decoration:none}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb__sep{color:var(--gold)}
/* ========== TAG / CARD ========== */
.tag{display:inline-block;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.05em;color:var(--royal);border:1px solid var(--gold-line);background:rgba(241,223,180,.25);padding:2px 10px;line-height:1.6;white-space:nowrap}
.card{background:#fff;border:1px solid var(--gold-line);border-radius:0;padding:24px;position:relative}
.card--outline{background:transparent;border:1px solid var(--gold-line)}
/* ========== IMAGE FRAME ========== */
.img-frame{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--royal) 0%,#123a75 100%);border:1px solid var(--gold)}
.img-frame--wide{aspect-ratio:16/10}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--square{aspect-ratio:1/1}
.img-frame::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(201,160,99,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(201,160,99,.14) 1px,transparent 1px);background-size:24px 24px;opacity:.5}
.img-frame::after{content:"";position:absolute;inset:14px;border:1px solid rgba(241,223,180,.45);pointer-events:none;z-index:2}
.img-frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
/* ========== HEADER ========== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1200;padding:20px 24px 0;transition:padding .3s ease}
.site-header[data-scrolled]{padding-top:10px}
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--gold),#E6C98A);z-index:1300;transition:width .1s linear,opacity .3s}
.header-capsule{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;gap:20px;background:rgba(247,242,231,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--gold-line);border-radius:999px;padding:8px 12px 8px 8px;box-shadow:var(--shadow);transition:box-shadow .3s,border-color .3s}
.site-header[data-scrolled] .header-capsule{box-shadow:0 4px 20px rgba(10,36,99,.12);border-color:rgba(201,160,99,.75)}
.skip-link{position:absolute;top:-120px;left:24px;z-index:2000;background:var(--royal);color:#F7F2E7;padding:10px 20px;font-weight:600;text-decoration:none;transition:top .2s ease;border-radius:0}
.skip-link:focus{top:12px}
.header-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--royal);flex-shrink:0}
.header-brand__mark{width:42px;height:42px;background:var(--royal);color:var(--gold-light);display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-weight:700;font-size:1.4rem;line-height:1;position:relative;border-radius:2px}
.header-brand__mark::after{content:"";position:absolute;inset:3px;border:1px solid rgba(241,223,180,.55)}
.header-brand__text{display:flex;flex-direction:column;line-height:1.2}
.header-brand__name{font-family:var(--font-serif);font-weight:700;font-size:1.25rem;letter-spacing:.04em;color:var(--royal)}
.header-brand__sub{font-family:var(--font-mono);font-size:.675rem;color:var(--gold);letter-spacing:.18em}
.header-nav{display:flex;align-items:center;margin-left:auto}
.header-nav__list{display:flex;align-items:center;gap:2px}
.header-nav__item{margin:0}
.header-nav__link{display:block;padding:8px 14px;font-size:.9375rem;font-weight:600;color:var(--dark);text-decoration:none;border-radius:999px;transition:background .2s,color .2s;white-space:nowrap}
.header-nav__link:hover{background:rgba(201,160,99,.18);color:var(--royal)}
.header-nav__link[aria-current="page"]{background:rgba(201,160,99,.22);color:var(--royal)}
.header-cta{margin-left:4px;flex-shrink:0}
.header-toggle{display:none;width:42px;height:42px;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid var(--gold-line);border-radius:999px;color:var(--royal);flex-shrink:0;transition:background .2s}
.header-toggle:hover{background:rgba(201,160,99,.14)}
.header-toggle__line{width:18px;height:2px;background:currentColor;transition:transform .3s ease,opacity .3s ease;border-radius:1px}
.header-toggle[aria-expanded="true"] .header-toggle__line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.header-toggle[aria-expanded="true"] .header-toggle__line:nth-child(2){opacity:0}
.header-toggle[aria-expanded="true"] .header-toggle__line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:1139px){
  .header-brand__sub{display:none}
}
@media (max-width:1023px){
  .page-content{padding-top:110px}
  .header-capsule{gap:10px;border-radius:999px}
  .header-toggle{display:flex}
  .header-nav{position:absolute;top:calc(100% + 12px);left:0;right:0;margin:0;background:rgba(247,242,231,.98);border:1px solid var(--gold-line);border-radius:16px;padding:12px;flex-direction:column;align-items:stretch;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s ease,transform .25s ease,visibility .25s;box-shadow:0 20px 48px rgba(10,36,99,.16);z-index:1100}
  .header-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .header-nav__list{flex-direction:column;width:100%}
  .header-nav__link{padding:12px 16px;border-radius:8px;border-bottom:1px solid rgba(201,160,99,.15)}
  .header-nav__item:last-child .header-nav__link{border-bottom:none}
  .header-cta{margin-left:auto}
}
@media (max-width:767px){
  .site-header{padding:12px 12px 0}
  .header-capsule{padding:6px 8px 6px 6px;gap:8px}
  .header-brand__mark{width:34px;height:34px;font-size:1.1rem}
  .header-brand__name{font-size:1.0625rem}
  .header-cta{font-size:.75rem;padding:.5em .9em;min-height:32px}
  .header-toggle{width:36px;height:36px;gap:4px}
  .header-toggle__line{width:16px}
  .container{padding-left:16px;padding-right:16px}
  .page-content{padding:100px 16px 48px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .section{padding:48px 0}
}
@media (max-width:419px){
  .header-brand__name{font-size:.9375rem}
  .header-cta{padding:.45em .7em;font-size:.7rem;white-space:nowrap}
  .header-cta:hover{transform:none}
}
/* ========== FOOTER ========== */
.site-footer{background:var(--royal-deep);color:rgba(247,242,231,.85);margin-top:96px;padding:64px 0 0;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--gold) 0%,var(--gold) 38%,rgba(201,160,99,.12) 38%,transparent 100%)}
.footer-inner{padding-top:24px;padding-bottom:32px}
.footer-top{display:grid;grid-template-columns:1.1fr 1.9fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(201,160,99,.25)}
.footer-brand{display:flex;flex-wrap:wrap;align-items:center;gap:14px;align-content:flex-start}
.footer-brand__mark{width:52px;height:52px;background:var(--royal);color:var(--gold-light);display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-weight:700;font-size:1.6rem;border:1px solid rgba(201,160,99,.45);position:relative}
.footer-brand__mark::after{content:"";position:absolute;inset:4px;border:1px solid rgba(241,223,180,.35)}
.footer-brand__text{display:flex;flex-direction:column;line-height:1.25}
.footer-brand__name{font-family:var(--font-serif);font-weight:700;font-size:1.5rem;color:var(--gold-light);letter-spacing:.05em}
.footer-brand__sub{font-family:var(--font-mono);font-size:.75rem;color:var(--gold);letter-spacing:.15em}
.footer-brand__line{flex-basis:100%;font-family:var(--font-mono);font-size:.75rem;color:rgba(241,223,180,.6);letter-spacing:.06em;margin-top:8px;padding-left:66px}
.footer-about p{font-size:.9375rem;line-height:1.8;color:rgba(247,242,231,.75);max-width:62ch}
.footer-trust{font-family:var(--font-sans);font-size:.8125rem;color:rgba(241,223,180,.55);border-left:2px solid var(--gold);padding-left:16px;margin-top:16px}
.footer-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;padding:48px 0}
.footer-col__title{font-family:var(--font-serif);font-size:1rem;color:var(--gold);letter-spacing:.12em;font-weight:600;margin-bottom:20px;position:relative;padding-bottom:8px;border-bottom:1px solid rgba(201,160,99,.25)}
.footer-col__list li,.footer-contact li{margin-bottom:10px;font-size:.9375rem}
.footer-col__list a{color:rgba(247,242,231,.8);text-decoration:none;transition:color .2s,padding-left .2s}
.footer-col__list a:hover{color:var(--gold-light);padding-left:4px}
.footer-contact li{color:rgba(247,242,231,.75);font-family:var(--font-mono);font-size:.8125rem;word-break:break-all}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid rgba(201,160,99,.2);padding-top:24px;margin-top:8px}
.footer-copyright,.footer-icp{font-family:var(--font-mono);font-size:.75rem;color:rgba(241,223,180,.5);margin:0}
@media (max-width:1023px){
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-columns{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .site-footer{margin-top:64px;padding:40px 0 0}
  .footer-columns{grid-template-columns:1fr;padding:32px 0;gap:28px}
  .footer-brand__line{padding-left:0}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
/* ========== BACK TO TOP ========== */
.back-to-top{position:fixed;right:28px;bottom:32px;z-index:900;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--royal);color:var(--gold-light);border:1px solid var(--gold);font-size:1.5rem;font-family:var(--font-mono);line-height:1;box-shadow:0 8px 24px rgba(10,36,99,.3);transition:opacity .3s,transform .3s,background .2s;cursor:pointer}
.back-to-top:hover{background:var(--royal-deep);transform:translateY(-3px)}
.back-to-top[hidden]{opacity:0;pointer-events:none;transform:translateY(12px);display:flex}
@media (max-width:767px){
  .back-to-top{right:16px;bottom:16px;width:42px;height:42px}
}
/* ========== FOCUS & REDUCED MOTION (extra safety) ========== */
:focus-visible{outline:2px solid var(--royal);outline-offset:2px}
@media (max-width:1023px){
  .header-nav[data-open]{animation:navDrop .25s ease both}
}
@keyframes navDrop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}