/* ===== RESET ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border:0;font:inherit;vertical-align:baseline}
html{scroll-behavior:smooth;text-size-adjust:100%;-webkit-text-size-adjust:100%}
body{min-height:100vh;line-height:1.6;font-family:"Noto Sans SC",sans-serif;font-weight:400;font-size:clamp(1rem,2vw,1.2rem);color:#212121;background:#1A3A5C;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,textarea{font:inherit;color:inherit;background:none;appearance:none;-webkit-appearance:none}
:focus-visible{outline:2px solid #D32F2F;outline-offset:2px;border-radius:2px}
::selection{background:#D32F2F;color:#FFFFFF}

/* ===== VARIABLES ===== */
:root{
  --clr-primary:#1A3A5C;
  --clr-primary-dark:#0F2440;
  --clr-primary-light:#2C5F7A;
  --clr-secondary:#FFFFFF;
  --clr-accent1:#D32F2F;
  --clr-accent2:#388E3C;
  --clr-neutral1:#F5F5F5;
  --clr-neutral2:#212121;
  --clr-highlight:#FFC107;
  --font-heading:"Noto Sans SC",sans-serif;
  --font-body:"Noto Sans SC",sans-serif;
  --fw-heading:700;
  --fw-body:400;
  --fw-light:300;
  --size-heading:clamp(1.8rem,4vw,3rem);
  --size-body:clamp(1rem,2vw,1.2rem);
  --size-caption:0.875rem;
  --lh-body:1.6;
  --ls-heading:0.02em;
  --ls-body:0.01em;
  --max-width:1200px;
  --rail-width:100px;
  --spacing-xs:0.25rem;
  --spacing-sm:0.5rem;
  --spacing-md:1rem;
  --spacing-lg:2rem;
  --spacing-xl:3rem;
  --spacing-2xl:5rem;
  --radius-sm:2px;
  --radius-md:4px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:0 4px 12px rgba(0,0,0,0.1);
  --transition-fast:200ms ease;
  --transition-base:300ms ease;
  --transition-slow:500ms ease;
}

/* ===== TYPOGRAPHY ===== */
h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:var(--fw-heading);font-size:var(--size-heading);letter-spacing:var(--ls-heading);line-height:1.2;color:var(--clr-neutral2)}
h1{font-size:clamp(2.2rem,5vw,3.5rem)}
h2{font-size:clamp(1.8rem,3.5vw,2.6rem)}
h3{font-size:clamp(1.4rem,2.8vw,2rem)}
h4{font-size:clamp(1.2rem,2.2vw,1.6rem)}
p,li,blockquote{font-family:var(--font-body);font-weight:var(--fw-body);font-size:var(--size-body);line-height:var(--lh-body);letter-spacing:var(--ls-body);color:var(--clr-neutral2)}
.caption{font-family:var(--font-body);font-weight:var(--fw-light);font-size:var(--size-caption);color:#616161}

/* ===== SKIP LINK ===== */
.skip-link{position:absolute;top:-100%;left:0;z-index:9999;padding:var(--spacing-sm) var(--spacing-md);background:var(--clr-accent1);color:var(--clr-secondary);font-weight:700;font-size:0.875rem;border-radius:0 0 var(--radius-md) 0;transition:top var(--transition-fast)}
.skip-link:focus{top:0;outline:none}

/* ===== HEADER & SIDE RAIL ===== */
.site-header{position:relative;z-index:100}
.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:56px;padding:0 var(--spacing-md);background:var(--clr-primary);align-items:center;justify-content:space-between;z-index:200;box-shadow:0 2px 8px rgba(0,0,0,0.15)}
.mobile-brand{display:flex;flex-direction:column;line-height:1.2}
.mobile-brand .brand-name{font-size:1.1rem;font-weight:700;color:var(--clr-secondary);letter-spacing:0.02em}
.mobile-brand .brand-subtitle{font-size:0.65rem;font-weight:300;color:rgba(255,255,255,0.7);letter-spacing:0.08em}
.nav-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;background:transparent;border:none;cursor:pointer;border-radius:var(--radius-sm);transition:background var(--transition-fast)}
.nav-toggle:hover{background:rgba(255,255,255,0.1)}
.nav-toggle-icon{position:relative;display:block;width:24px;height:2px;background:var(--clr-secondary);border-radius:1px;transition:background var(--transition-fast)}
.nav-toggle-icon::before,.nav-toggle-icon::after{content:'';position:absolute;left:0;width:24px;height:2px;background:var(--clr-secondary);border-radius:1px;transition:transform var(--transition-base)}
.nav-toggle-icon::before{top:-7px}
.nav-toggle-icon::after{top:7px}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{transform:translateY(-7px) rotate(-45deg)}

.side-rail{position:fixed;top:0;left:0;bottom:0;width:var(--rail-width);background:var(--clr-primary);display:flex;flex-direction:column;align-items:center;padding:var(--spacing-lg) 0 var(--spacing-md);z-index:150;overflow-y:auto;transition:transform var(--transition-base)}
.rail-brand{margin-bottom:var(--spacing-xl);text-align:center;width:100%;padding:0 var(--spacing-xs)}
.rail-brand .brand-link{display:flex;flex-direction:column;align-items:center;gap:2px}
.rail-brand .brand-name{font-size:0.95rem;font-weight:700;color:var(--clr-secondary);letter-spacing:0.04em;writing-mode:vertical-lr;text-orientation:upright;margin-bottom:4px}
.rail-brand .brand-subtitle{font-size:0.5rem;font-weight:300;color:rgba(255,255,255,0.5);letter-spacing:0.1em;writing-mode:vertical-lr}
.nav-list{display:flex;flex-direction:column;gap:var(--spacing-sm);width:100%;padding:0 var(--spacing-xs)}
.nav-item{width:100%;text-align:center}
.nav-link{display:block;padding:var(--spacing-sm) 0;font-size:0.65rem;font-weight:500;color:rgba(255,255,255,0.75);letter-spacing:0.06em;writing-mode:vertical-lr;transition:color var(--transition-fast),background var(--transition-fast);border-radius:var(--radius-sm)}
.nav-link:hover,.nav-link:focus-visible{color:var(--clr-secondary);background:rgba(255,255,255,0.08)}
.nav-link[aria-current="page"]{color:var(--clr-accent1);font-weight:700;position:relative}
.nav-link[aria-current="page"]::after{content:'';position:absolute;right:-2px;top:50%;transform:translateY(-50%);width:3px;height:60%;background:var(--clr-accent1);border-radius:2px}
.nav-decor{margin-top:auto;width:30px;height:60px;border-left:2px solid rgba(255,255,255,0.08);border-bottom:2px solid rgba(255,255,255,0.08);clip-path:polygon(0 0,100% 100%,0 100%);opacity:0.4}

/* ===== MOBILE NAV DRAWER ===== */
@media(max-width:768px){
  .mobile-header{display:flex}
  .site-header{padding-top:56px}
  .side-rail{transform:translateX(-100%);width:280px;padding-top:var(--spacing-xl);box-shadow:4px 0 24px rgba(0,0,0,0.3)}
  .side-rail[data-open]{transform:translateX(0)}
  .rail-brand .brand-name{writing-mode:horizontal-tb;text-orientation:initial;font-size:1.2rem}
  .rail-brand .brand-subtitle{writing-mode:horizontal-tb;text-orientation:initial;font-size:0.7rem}
  .nav-link{writing-mode:horizontal-tb;text-align:left;padding:var(--spacing-sm) var(--spacing-md);font-size:0.9rem}
  .nav-link[aria-current="page"]::after{right:auto;left:0;top:0;bottom:0;width:4px;height:100%;transform:none;border-radius:0 2px 2px 0}
  .nav-decor{display:none}
  .rail-brand{margin-bottom:var(--spacing-lg)}
}

@media(min-width:769px){
  .side-rail{transform:translateX(0)}
  body{padding-left:var(--rail-width)}
}

/* ===== FOOTER ===== */
.site-footer{background:var(--clr-primary-dark);color:var(--clr-secondary);padding:0;position:relative}
.footer-decor{height:6px;background:linear-gradient(90deg,var(--clr-primary) 0%,var(--clr-primary-light) 30%,var(--clr-accent1) 50%,var(--clr-primary-light) 70%,var(--clr-primary) 100%);opacity:0.6;position:relative;overflow:hidden}
.footer-decor::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,transparent 40%,rgba(255,255,255,0.08) 50%,transparent 60%);clip-path:polygon(0 100%,20% 0,40% 100%,60% 0,80% 100%,100% 0,100% 100%,0 100%)}
.footer-inner{max-width:var(--max-width);margin:0 auto;padding:var(--spacing-xl) var(--spacing-lg);display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--spacing-xl)}
.footer-brand .brand-name{display:block;font-size:1.2rem;font-weight:700;letter-spacing:0.04em;margin-bottom:2px}
.footer-brand .brand-subtitle{display:block;font-size:0.75rem;font-weight:300;color:rgba(255,255,255,0.6);letter-spacing:0.08em;margin-bottom:var(--spacing-md)}
.footer-trust{font-size:0.8rem;line-height:1.5;color:rgba(255,255,255,0.7);max-width:320px}
.footer-links{display:flex;flex-direction:column;gap:var(--spacing-sm);padding-top:var(--spacing-sm)}
.footer-link{font-size:0.9rem;color:rgba(255,255,255,0.8);transition:color var(--transition-fast),padding-left var(--transition-fast);padding:var(--spacing-xs) 0}
.footer-link:hover{color:var(--clr-accent1);padding-left:4px}
.footer-contact{display:flex;flex-direction:column;gap:var(--spacing-sm);padding-top:var(--spacing-sm)}
.contact-item{font-size:0.8rem;color:rgba(255,255,255,0.7);line-height:1.5}
.contact-note{font-size:0.7rem;color:rgba(255,255,255,0.5);margin-top:var(--spacing-xs);font-style:italic}
.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;padding-top:var(--spacing-lg);border-top:1px solid rgba(255,255,255,0.08);font-size:0.75rem;color:rgba(255,255,255,0.5)}
@media(max-width:768px){
  .footer-inner{grid-template-columns:1fr;gap:var(--spacing-lg);padding:var(--spacing-lg) var(--spacing-md)}
  .footer-bottom{flex-direction:column;gap:var(--spacing-sm);text-align:center}
  .footer-trust{max-width:100%}
}

/* ===== BUTTON ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:0.6rem 1.8rem;font-family:var(--font-heading);font-weight:600;font-size:0.95rem;letter-spacing:0.04em;border-radius:0;cursor:pointer;transition:all var(--transition-base);text-align:center;line-height:1.2;min-height:44px;clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px))}
.btn-primary{background:var(--clr-accent1);color:var(--clr-secondary);border:2px solid var(--clr-accent1)}
.btn-primary:hover,.btn-primary:focus-visible{background:transparent;color:var(--clr-accent1)}
.btn-secondary{background:transparent;color:var(--clr-primary);border:2px solid var(--clr-primary)}
.btn-secondary:hover,.btn-secondary:focus-visible{background:var(--clr-primary);color:var(--clr-secondary)}
.btn-sm{padding:0.4rem 1.2rem;font-size:0.8rem;min-height:36px}
.btn-lg{padding:0.8rem 2.4rem;font-size:1.1rem}

/* ===== BREADCRUMB ===== */
.breadcrumb{display:flex;flex-wrap:wrap;gap:var(--spacing-xs);padding:var(--spacing-md) 0;font-size:0.8rem;color:#757575}
.breadcrumb a{color:var(--clr-primary);transition:color var(--transition-fast)}
.breadcrumb a:hover{color:var(--clr-accent1)}
.breadcrumb .separator{margin:0 var(--spacing-xs);color:#bdbdbd}
.breadcrumb .current{color:var(--clr-neutral2);font-weight:600}

/* ===== CONTAINER ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--spacing-lg)}
@media(max-width:768px){.container{padding:0 var(--spacing-md)}}

/* ===== SECTION ===== */
.section{padding:var(--spacing-2xl) 0;position:relative}
.section[data-section-number]::before{content:attr(data-section-number);position:absolute;top:var(--spacing-lg);left:0;font-family:var(--font-heading);font-weight:900;font-size:clamp(3rem,8vw,6rem);color:rgba(26,58,92,0.06);line-height:1;pointer-events:none;user-select:none}
.section .section-title{position:relative;padding-bottom:var(--spacing-md);margin-bottom:var(--spacing-lg)}
.section .section-title::after{content:'';position:absolute;bottom:0;left:0;width:48px;height:3px;background:var(--clr-accent1);clip-path:polygon(0 0,100% 0,90% 100%,0 100%)}

/* ===== GRID ===== */
.grid{display:grid;gap:var(--spacing-lg)}
.grid[data-grid="2"]{grid-template-columns:1fr 1fr}
.grid[data-grid="3"]{grid-template-columns:1fr 1fr 1fr}
.grid[data-grid="4"]{grid-template-columns:1fr 1fr 1fr 1fr}
.grid[data-grid="auto"]{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
@media(max-width:768px){
  .grid[data-grid="2"],.grid[data-grid="3"],.grid[data-grid="4"]{grid-template-columns:1fr}
}
@media(min-width:769px)and(max-width:1024px){
  .grid[data-grid="3"],.grid[data-grid="4"]{grid-template-columns:1fr 1fr}
}

/* ===== CARD ===== */
.card{background:var(--clr-secondary);padding:var(--spacing-lg);border-radius:0;box-shadow:var(--shadow-sm);transition:transform var(--transition-base),box-shadow var(--transition-base);clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));position:relative}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.card-title{font-size:1.1rem;font-weight:700;margin-bottom:var(--spacing-sm);color:var(--clr-primary)}
.card-body{font-size:0.9rem;line-height:1.5;color:#616161}
.card-accent{border-left:0;position:relative}
.card-accent::before{content:'';position:absolute;top:0;left:0;bottom:0;width:4px;background:var(--clr-accent1);clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 8px))}

/* ===== REVEAL ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity var(--transition-slow),transform var(--transition-slow)}
.reveal.is-visible{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ===== SCROLL PROGRESS ===== */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:999;background:transparent;pointer-events:none}
.scroll-progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--clr-accent1),var(--clr-highlight));transition:width 100ms linear;transform-origin:left}
@media(prefers-reduced-motion:reduce){.scroll-progress{display:none}}

/* ===== BACK TO TOP ===== */
.back-to-top{position:fixed;bottom:var(--spacing-lg);right:var(--spacing-lg);z-index:90;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--clr-primary);color:var(--clr-secondary);border:2px solid var(--clr-primary);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity var(--transition-base),visibility var(--transition-base),transform var(--transition-base),background var(--transition-fast);clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);font-size:1.2rem;line-height:1}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover,.back-to-top:focus-visible{background:var(--clr-accent1);border-color:var(--clr-accent1)}
.back-to-top::after{content:'↑';font-weight:700}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}

/* ===== UTILITY ===== */
.text-center{text-align:center}
.text-accent{color:var(--clr-accent1)}
.text-muted{color:#757575}
.mt-lg{margin-top:var(--spacing-lg)}
.mb-lg{margin-bottom:var(--spacing-lg)}
.p-lg{padding:var(--spacing-lg)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media(min-width:769px){
  .container{padding:0 var(--spacing-xl)}
}
@media(min-width:1200px){
  .container{padding:0 var(--spacing-2xl)}
}

/* ===== REDUCED MOTION ===== */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0ms!important;animation-duration:0ms!important}
  .card:hover{transform:none}
  .nav-toggle-icon,.nav-toggle-icon::before,.nav-toggle-icon::after{transition:none}
  .btn{transition:none}
  .footer-link{transition:none}
  .nav-link{transition:none}
}

/* ===== PRINT ===== */
@media print{
  .site-header,.site-footer,.scroll-progress,.back-to-top,.nav-toggle{display:none!important}
  body{padding-left:0!important}
  .section::before{display:none}
  .card{clip-path:none;box-shadow:none;border:1px solid #ddd;break-inside:avoid}
}