:root {
  --color-primary: #0B1A2C;
  --color-accent: #D4AF37;
  --color-purple: #7B2D8B;
  --color-green: #39FF14;
  --color-white: #FFFFFF;
  --color-light: #F0F0F0;
  --color-text: #0B1A2C;
  --color-text-light: #555;
  --font-heading: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-accent: 'Space Mono', 'Courier New', monospace;
  --border-gold: 2px solid var(--color-accent);
  --shadow-stack: 0 4px 20px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --radius: 4px;
  --max-width: 1200px;
  --nav-height: 64px;
  --border-frame: 2px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font-body);
  color:var(--color-text);
  background:var(--color-white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  position:relative;
  min-height:100vh;
}
/* 框架左右金边 */
body::before,
body::after{
  content:'';
  position:fixed;
  top:0;
  bottom:0;
  width:var(--border-frame);
  background:linear-gradient(180deg, rgba(212,175,55,0.85), rgba(123,45,139,0.35), rgba(212,175,55,0.15));
  z-index:9990;
  pointer-events:none;
  transition:opacity 0.3s;
}
body::before{left:0}
body::after{right:0}
@media(max-width:768px){
  body::before,body::after{width:1px;background:rgba(212,175,55,0.5)}
}
/* skip link */
.skip-link{
  position:fixed;
  top:-100%;
  left:1rem;
  z-index:10000;
  padding:0.5rem 1.2rem;
  background:var(--color-accent);
  color:var(--color-primary);
  font-weight:700;
  text-decoration:none;
  border-radius:0 0 var(--radius) var(--radius);
  font-size:0.9rem;
  transition:top 0.2s;
}
.skip-link:focus{top:0}
/* 框架导航 */
.frame-nav{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--nav-height);
  background:var(--color-primary);
  border-top:var(--border-gold);
  border-bottom:1px solid rgba(212,175,55,0.25);
  z-index:9000;
  display:flex;
  align-items:center;
}
.frame-nav__progress{
  position:absolute;
  top:-2px;
  left:0;
  height:2px;
  width:0%;
  background:linear-gradient(90deg, var(--color-accent), var(--color-green));
  z-index:9001;
  transition:width 0.1s linear;
  pointer-events:none;
}
@media(prefers-reduced-motion:reduce){
  .frame-nav__progress{transition:none}
}
.frame-nav__inner{
  width:100%;
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 1.5rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:100%;
  position:relative;
}
.frame-nav__logo{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:1.6rem;
  color:var(--color-accent);
  text-decoration:none;
  letter-spacing:0.04em;
  white-space:nowrap;
  position:relative;
  z-index:2;
}
.frame-nav__logo::after{
  content:'◆';
  font-size:0.6rem;
  color:var(--color-accent);
  margin-left:6px;
  opacity:0.7;
  vertical-align:super;
}
.frame-nav__toggle{
  display:none;
  background:none;
  border:none;
  cursor:pointer;
  padding:0.4rem;
  flex-direction:column;
  gap:4px;
  width:36px;
  height:36px;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius);
  transition:background 0.2s;
  z-index:2;
}
.frame-nav__toggle-bar{
  display:block;
  width:24px;
  height:2px;
  background:var(--color-white);
  border-radius:2px;
  transition:transform 0.3s, opacity 0.3s;
}
.frame-nav__toggle:hover{background:rgba(212,175,55,0.15)}
.frame-nav__toggle[aria-expanded="true"] .frame-nav__toggle-bar:nth-child(1){
  transform:translateY(6px) rotate(45deg)
}
.frame-nav__toggle[aria-expanded="true"] .frame-nav__toggle-bar:nth-child(2){
  opacity:0
}
.frame-nav__toggle[aria-expanded="true"] .frame-nav__toggle-bar:nth-child(3){
  transform:translateY(-6px) rotate(-45deg)
}
.frame-nav__nav{
  display:flex;
  align-items:center;
}
.frame-nav__list{
  display:flex;
  list-style:none;
  gap:0.25rem;
  align-items:center;
}
.frame-nav__item{
  position:relative;
}
.frame-nav__link{
  display:block;
  padding:0.5rem 1rem;
  font-family:var(--font-accent);
  font-size:0.78rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--color-white);
  text-decoration:none;
  border-radius:var(--radius);
  transition:background 0.2s, color 0.2s;
  position:relative;
}
.frame-nav__link:hover{
  background:rgba(123,45,139,0.25);
  color:var(--color-accent);
}
.frame-nav__link:focus-visible{
  outline:2px solid var(--color-green);
  outline-offset:2px;
  background:rgba(57,255,20,0.1);
}
.frame-nav__link[aria-current="page"]{
  color:var(--color-accent);
  font-weight:700;
}
.frame-nav__link[aria-current="page"]::after{
  content:'';
  position:absolute;
  bottom:2px;
  left:0.8rem;
  right:0.8rem;
  height:2px;
  background:var(--color-accent);
  border-radius:1px;
}
/* 移动端导航 */
@media(max-width:768px){
  .frame-nav__toggle{display:flex}
  .frame-nav__nav{
    position:fixed;
    top:var(--nav-height);
    left:0;
    right:0;
    bottom:0;
    background:var(--color-primary);
    padding:2rem 1.5rem;
    transform:translateX(100%);
    transition:transform 0.35s cubic-bezier(0.4,0,0.2,1);
    overflow-y:auto;
    align-items:flex-start;
    border-left:1px solid rgba(212,175,55,0.2);
  }
  .frame-nav__nav[data-open]{
    transform:translateX(0);
  }
  .frame-nav__list{
    flex-direction:column;
    width:100%;
    gap:0.5rem;
  }
  .frame-nav__link{
    font-size:0.9rem;
    padding:0.8rem 1rem;
    border-bottom:1px solid rgba(255,255,255,0.06);
    width:100%;
  }
  .frame-nav__link[aria-current="page"]::after{
    bottom:4px;
  }
  .frame-nav__logo{font-size:1.3rem}
  .frame-nav__inner{padding:0 1rem}
}
@media(min-width:769px){
  .frame-nav__nav{display:flex!important;transform:none!important;position:static!important;background:transparent!important;padding:0!important;border:none!important;overflow:visible!important}
}
/* 页脚 */
.frame-footer{
  background:var(--color-primary);
  border-top:1px solid rgba(212,175,55,0.3);
  color:var(--color-white);
  padding:2.5rem 1.5rem 1.5rem;
  position:relative;
  z-index:1;
}
.frame-footer__inner{
  max-width:var(--max-width);
  margin:0 auto;
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:2rem;
  padding-bottom:2rem;
  border-bottom:1px solid rgba(212,175,55,0.15);
}
.frame-footer__title{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:1.4rem;
  color:var(--color-accent);
  margin-bottom:0.3rem;
}
.frame-footer__tagline{
  font-family:var(--font-accent);
  font-size:0.75rem;
  text-transform:uppercase;
  color:rgba(212,175,55,0.6);
  letter-spacing:0.1em;
}
.frame-footer__links{
  display:flex;
  flex-direction:column;
  gap:0.5rem;
}
.frame-footer__link{
  font-family:var(--font-accent);
  font-size:0.8rem;
  color:var(--color-accent);
  text-decoration:none;
  letter-spacing:0.04em;
  transition:color 0.2s, padding-left 0.2s;
  padding-left:0;
}
.frame-footer__link:hover{
  color:var(--color-green);
  padding-left:4px;
}
.frame-footer__link:focus-visible{
  outline:2px solid var(--color-green);
  outline-offset:2px;
  border-radius:2px;
}
.frame-footer__contact{
  display:flex;
  flex-direction:column;
  gap:0.3rem;
}
.frame-footer__email,
.frame-footer__phone{
  font-size:0.85rem;
  color:rgba(255,255,255,0.8);
  font-family:var(--font-accent);
  letter-spacing:0.02em;
}
.frame-footer__bottom{
  max-width:var(--max-width);
  margin:1.2rem auto 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:0.5rem;
}
.frame-footer__copy,
.frame-footer__addr{
  font-size:0.75rem;
  color:rgba(255,255,255,0.5);
  font-family:var(--font-accent);
}
@media(max-width:768px){
  .frame-footer__inner{
    grid-template-columns:1fr;
    gap:1.5rem;
    text-align:center;
  }
  .frame-footer__links{align-items:center}
  .frame-footer__contact{align-items:center}
  .frame-footer__bottom{flex-direction:column;text-align:center}
}
@media(min-width:769px)and(max-width:1024px){
  .frame-footer__inner{grid-template-columns:1fr 1fr;gap:1.5rem}
  .frame-footer__brand{grid-column:1/2}
  .frame-footer__links{grid-column:2/3}
  .frame-footer__contact{grid-column:1/3;text-align:center}
}
/* 共享组件 */
.gold-line{
  width:60px;
  height:2px;
  background:var(--color-accent);
  margin:1.5rem 0;
}
.section-number{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:clamp(3rem, 10vw, 6rem);
  color:var(--color-accent);
  line-height:1;
  letter-spacing:-0.03em;
  opacity:0.85;
}
.rotate-label{
  writing-mode:vertical-rl;
  font-family:var(--font-accent);
  font-size:0.7rem;
  text-transform:uppercase;
  color:var(--color-accent);
  letter-spacing:0.15em;
  opacity:0.7;
  transform:rotate(180deg);
}
.print-border{
  border:1px dashed rgba(212,175,55,0.4);
  border-radius:var(--radius);
  padding:1.5rem;
  background:rgba(255,255,255,0.02);
}
.paper-stack{
  box-shadow:var(--shadow-stack);
  border:1px solid rgba(0,0,0,0.04);
  border-radius:var(--radius);
  background:var(--color-white);
  position:relative;
  transition:box-shadow 0.2s;
}
.paper-stack::before{
  content:'';
  position:absolute;
  top:4px;
  left:4px;
  right:-4px;
  bottom:-4px;
  background:rgba(11,26,44,0.03);
  border-radius:var(--radius);
  z-index:-1;
}
.tag-label{
  display:inline-block;
  font-family:var(--font-accent);
  font-size:0.65rem;
  text-transform:uppercase;
  letter-spacing:0.08em;
  padding:0.2rem 0.6rem;
  border:1px solid var(--color-accent);
  color:var(--color-accent);
  border-radius:2px;
  background:transparent;
}
.tag-label--filled{
  background:var(--color-accent);
  color:var(--color-primary);
  font-weight:700;
}
/* 通用按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-accent);
  font-size:0.8rem;
  text-transform:uppercase;
  letter-spacing:0.08em;
  padding:0.75rem 2rem;
  border:2px solid var(--color-accent);
  background:transparent;
  color:var(--color-accent);
  text-decoration:none;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background 0.2s, color 0.2s, border-color 0.2s;
  position:relative;
}
.btn:hover{
  background:var(--color-accent);
  color:var(--color-primary);
}
.btn:focus-visible{
  outline:2px solid var(--color-green);
  outline-offset:2px;
}
.btn--primary{
  background:var(--color-accent);
  color:var(--color-primary);
  border-color:var(--color-accent);
  font-weight:700;
}
.btn--primary:hover{
  background:var(--color-primary);
  color:var(--color-accent);
  border-color:var(--color-primary);
}
/* 正文容器 */
.content-container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 1.5rem;
}
.content-section{
  padding:4rem 0;
}
@media(max-width:768px){
  .content-section{padding:2.5rem 0}
}
/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:0.4rem;
  align-items:center;
  font-family:var(--font-accent);
  font-size:0.7rem;
  text-transform:uppercase;
  color:var(--color-text-light);
  margin-bottom:1.5rem;
  letter-spacing:0.04em;
}
.breadcrumb a{
  color:var(--color-accent);
  text-decoration:none;
  transition:color 0.2s;
}
.breadcrumb a:hover{color:var(--color-green)}
.breadcrumb span{color:rgba(0,0,0,0.3)}
/* 通用网格 */
.grid-2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2rem;
}
.grid-3{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:2rem;
}
@media(max-width:768px){
  .grid-2,.grid-3{grid-template-columns:1fr;gap:1.5rem}
}
@media(min-width:769px)and(max-width:1024px){
  .grid-3{grid-template-columns:1fr 1fr}
}
/* 图片容器基础规则 */
.img-frame{
  position:relative;
  overflow:hidden;
  background:var(--color-light);
  aspect-ratio:16/9;
  border:1px solid rgba(212,175,55,0.15);
  border-radius:var(--radius);
}
.img-frame--portrait{aspect-ratio:9/16}
.img-frame--square{aspect-ratio:1/1}
.img-frame--wide{aspect-ratio:21/9}
.img-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
/* 焦点与可访问性 */
:focus-visible{
  outline:2px solid var(--color-green);
  outline-offset:2px;
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}
}
/* 页码占位 */
.page-placeholder{
  padding:6rem 0;
  text-align:center;
  color:var(--color-text-light);
  font-family:var(--font-accent);
  font-size:0.85rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
}