/* ==========================================================================
   新葡萄8883 · AMG 品牌站 — 共享样式 /assets/site.css
   暗色基底 + 葡萄紫结构 + 电光青交互 + 琥珀金数据
   ========================================================================== */

/* 1. 设计令牌
   ========================================================================== */
:root{
  --ink:#14151A;
  --panel:#1E2029;
  --line:#2E3240;
  --grape:#4A1E6D;
  --violet:#6C2FA0;
  --silver:#C0C7D1;
  --cyan:#00E5C7;
  --amber:#F2A93B;
  --ivory:#E8EAEF;
  --muted:#8B93A7;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Cascadia Mono",Consolas,"Liberation Mono",Menlo,monospace;

  --shell:1200px;
  --gutter:clamp(16px,4vw,40px);
  --r-capsule:999px;
  --r-panel:4px;
  --dur:280ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* 2. Reset
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,address{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
address{font-style:normal;}
table{border-collapse:collapse;}

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 640px at 84% -12%, rgba(108,47,160,.30), transparent 62%),
    radial-gradient(760px 520px at -8% 22%, rgba(0,229,199,.07), transparent 66%),
    linear-gradient(180deg, rgba(74,30,109,.16), rgba(20,21,26,0) 44%);
  background-repeat:no-repeat;
  color:var(--ivory);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.005em;
}

h1,h2,h3,h4,h5,h6{font-weight:900;line-height:1.15;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

#main-content{display:block;}

/* 3. 通用排版与文字角色
   ========================================================================== */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(46px,6.5vw,92px);}
.section-head{
  display:flex;
  flex-wrap:wrap;
  gap:14px 26px;
  align-items:flex-end;
  justify-content:space-between;
  padding-top:20px;
  border-top:1px solid var(--line);
  margin-bottom:clamp(24px,3vw,40px);
}
.eyebrow{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.display-title{
  font-weight:900;
  font-size:clamp(32px,5.6vw,58px);
  line-height:1.06;
  letter-spacing:-.01em;
}
.lede{
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.7;
  color:var(--silver);
  max-width:36em;
}
.chapter-index{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(64px,11vw,132px);
  line-height:.88;
  color:rgba(192,199,209,.10);
  -webkit-text-stroke:1px rgba(192,199,209,.26);
}
.prose{max-width:640px;}
.prose p + p{margin-top:1em;}
.prose ul{list-style:square;padding-left:1.2em;margin-top:.8em;}
.prose li + li{margin-top:.4em;}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.mono{font-family:var(--font-mono);letter-spacing:.02em;}
.muted{color:var(--muted);}
.text-cyan{color:var(--cyan);}
.text-amber{color:var(--amber);}
.divider{height:1px;border:0;background:var(--line);margin:0;}

/* 4. 无障碍
   ========================================================================== */
.skip-link{
  position:fixed;
  left:16px;
  top:-140px;
  z-index:200;
  padding:11px 18px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:#062521;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:top 220ms var(--ease);
}
.skip-link:focus{top:0;}

/* 5. 悬浮胶囊头部
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(20,21,26,.97),rgba(20,21,26,.86));
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.header-inner{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:12px;
  transition:padding var(--dur) var(--ease);
}
.site-header.is-scrolled .header-inner{padding-block:8px;}

/* 品牌岛 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  min-width:0;
  text-decoration:none;
  color:var(--ivory);
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:28px;
  height:28px;
  border-radius:9px;
  background:linear-gradient(140deg,var(--grape) 0%,var(--violet) 58%,#0E7F76 100%);
  border:1px solid rgba(192,199,209,.4);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.45);
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:6px;
  top:6px;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px rgba(0,229,199,.85);
}
.brand__mark::after{
  content:"";
  position:absolute;
  right:5px;
  bottom:5px;
  width:12px;
  height:12px;
  border:1.5px solid rgba(232,234,239,.78);
  border-radius:60% 0 60% 60%;
  transform:rotate(-45deg);
}
.brand__text{display:flex;flex-direction:column;line-height:1.12;min-width:0;}
.brand__name{font-size:16px;font-weight:900;letter-spacing:.02em;color:var(--ivory);}
.brand__line{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

/* 导航胶囊 */
.nav-capsule{
  display:none;
  position:absolute;
  left:var(--gutter);
  right:var(--gutter);
  top:calc(100% + 8px);
  z-index:90;
}
.nav-capsule[data-open]{display:block;}
.nav-list{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:10px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:0 26px 60px rgba(0,0,0,.6);
}
.nav-link{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 14px;
  border-radius:10px;
  border:1px solid transparent;
  font-size:14.5px;
  font-weight:500;
  color:var(--silver);
  text-decoration:none;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-link:hover{
  color:var(--ivory);
  background:rgba(74,30,109,.5);
  border-color:rgba(108,47,160,.6);
}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(0,229,199,.08);
  border-color:rgba(0,229,199,.32);
}
.nav-link[aria-current="page"]::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(0,229,199,.9);
}

/* 工具区与行动按钮 */
.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  flex:0 0 auto;
}
.tool-btn{
  padding:9px 13px;
  border-radius:var(--r-capsule);
  border:1px solid var(--line);
  background:rgba(30,32,41,.85);
  color:var(--silver);
  font-size:13px;
  font-weight:500;
  line-height:1;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.tool-btn:hover{border-color:var(--violet);color:var(--ivory);background:rgba(74,30,109,.45);}
.tool-btn[aria-expanded="true"]{color:var(--cyan);border-color:rgba(0,229,199,.5);background:rgba(0,229,199,.1);}
.cta-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border-radius:var(--r-capsule);
  background:linear-gradient(120deg,var(--grape) 0%,var(--violet) 100%);
  border:1px solid rgba(0,229,199,.35);
  color:#FFFFFF;
  font-size:14px;
  font-weight:700;
  line-height:1;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 10px 26px -14px rgba(108,47,160,1);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease);
}
.cta-link:hover{border-color:var(--cyan);box-shadow:0 12px 30px -12px rgba(0,229,199,.6);}
.cta-link__arrow{font-family:var(--font-mono);font-size:13px;color:var(--cyan);}
.cta-link__label{display:inline-block;}

/* 移动端汉堡 */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:var(--r-capsule);
  border:1px solid var(--line);
  background:rgba(30,32,41,.85);
  color:var(--silver);
  font-size:13px;
  font-weight:500;
  line-height:1;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--violet);color:var(--ivory);}
.nav-toggle[aria-expanded="true"]{color:var(--cyan);border-color:rgba(0,229,199,.5);background:rgba(0,229,199,.1);}
.nav-toggle__icon{position:relative;display:block;width:16px;height:12px;}
.nav-toggle__icon span{
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle__icon span:first-child{top:0;}
.nav-toggle__icon span:last-child{top:10px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:first-child{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:last-child{transform:translateY(-5px) rotate(-45deg);}
.nav-toggle__label{display:inline-block;}

/* 收藏 / 查询浮层 */
.utility-panel{
  position:absolute;
  top:calc(100% + 10px);
  right:max(var(--gutter), calc((100% - var(--shell)) / 2 + var(--gutter)));
  z-index:95;
  width:min(340px,calc(100vw - 2 * var(--gutter)));
  padding:18px 18px 16px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:0 28px 64px rgba(0,0,0,.62);
}
.utility-panel[hidden]{display:none;}
.utility-panel__title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:8px;
}
.utility-panel__text{font-size:14px;line-height:1.7;color:var(--silver);}
.utility-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.utility-links a{
  padding:7px 12px;
  border-radius:var(--r-capsule);
  border:1px solid var(--line);
  font-size:13px;
  color:var(--ivory);
  text-decoration:none;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.utility-links a:hover{border-color:var(--cyan);color:var(--cyan);}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--cyan) 0%,#5EE0D0 42%,var(--amber) 100%);
  box-shadow:0 0 14px rgba(0,229,199,.55);
}

/* 6. 按钮、徽标、数据面板
   ========================================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 22px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--ivory);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.btn:hover{border-color:var(--silver);}
.btn--primary{
  background:linear-gradient(120deg,var(--grape) 0%,var(--violet) 100%);
  border-color:rgba(0,229,199,.35);
  color:#FFFFFF;
}
.btn--primary:hover{border-color:var(--cyan);}
.btn--ghost{background:transparent;color:var(--cyan);border-color:rgba(0,229,199,.4);}
.btn--ghost:hover{background:rgba(0,229,199,.08);}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border-radius:var(--r-capsule);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--silver);
}
.badge--cyan{color:var(--cyan);border-color:rgba(0,229,199,.4);background:rgba(0,229,199,.08);}
.badge--amber{color:var(--amber);border-color:rgba(242,169,59,.4);background:rgba(242,169,59,.08);}

.data-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
}
.data-panel__head{
  display:flex;
  flex-wrap:wrap;
  gap:8px 16px;
  align-items:center;
  justify-content:space-between;
  padding:13px 18px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.data-panel__row{
  display:flex;
  flex-wrap:wrap;
  gap:6px 18px;
  align-items:baseline;
  justify-content:space-between;
  padding:15px 18px;
  border-bottom:1px solid var(--line);
}
.data-panel__row:last-child{border-bottom:0;}
.data-label{font-size:13.5px;line-height:1.6;color:var(--muted);}
.data-value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(20px,2.8vw,28px);
  line-height:1.1;
  color:var(--amber);
}

/* 7. 网格与媒体容器
   ========================================================================== */
.grid{display:grid;gap:clamp(18px,2.6vw,30px);grid-template-columns:1fr;}
.grid--split{grid-template-columns:1fr;}
.grid--panels{grid-template-columns:1fr;}

.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  background:linear-gradient(150deg,#1E2029 0%,#14151A 72%);
  aspect-ratio:16/10;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(rgba(46,50,64,.6) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,50,64,.6) 1px,transparent 1px);
  background-size:44px 44px;
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--tall{aspect-ratio:4/5;}
.media-frame--square{aspect-ratio:1/1;}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.6;
  color:var(--muted);
}

/* 8. 面包屑
   ========================================================================== */
.breadcrumbs{
  padding-block:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:0;align-items:center;}
.breadcrumbs li{display:inline-flex;align-items:center;}
.breadcrumbs li:not(:last-child)::after{content:"/";margin-inline:8px;color:var(--line);}
.breadcrumbs a{color:var(--silver);text-decoration:none;transition:color var(--dur) var(--ease);}
.breadcrumbs a:hover{color:var(--cyan);}
.breadcrumbs [aria-current="page"]{color:var(--cyan);}

/* 9. 页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,110px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 340px at 8% 0%, rgba(108,47,160,.42), transparent 68%),
    linear-gradient(180deg,#1A1B23 0%,#14151A 78%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,4vw,44px);
  padding-block:clamp(40px,6vw,72px);
}
.footer-brand__name{font-size:22px;font-weight:900;letter-spacing:.02em;color:var(--ivory);}
.footer-brand__line{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--cyan);
}
.footer-brand__note{margin-top:14px;font-size:14px;line-height:1.7;color:var(--silver);max-width:34em;}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer-links{display:flex;flex-direction:column;gap:9px;}
.footer-links a{
  font-size:14.5px;
  color:var(--silver);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--cyan);}
.footer-contact address{display:flex;flex-direction:column;gap:9px;font-size:14.5px;color:var(--silver);}
.footer-contact address .mono{margin-right:8px;font-size:12px;color:var(--muted);}
.footer-contact__note{margin-top:14px;font-size:13px;line-height:1.65;color:var(--muted);max-width:32em;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  align-items:center;
  justify-content:space-between;
  padding-block:20px;
  border-top:1px solid var(--line);
}
.footer-bottom p{font-size:12.5px;line-height:1.6;color:var(--muted);}
.footer-icp{font-family:var(--font-mono);letter-spacing:.06em;color:var(--silver);}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(30,32,41,.92);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{border-color:var(--cyan);}

/* 10. 滚动显现
   ========================================================================== */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 340ms var(--ease),transform 340ms var(--ease);
}
.js-ready [data-reveal].is-visible{opacity:1;transform:none;}

/* 11. 响应式
   ========================================================================== */
@media (min-width:640px){
  .grid--panels{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:720px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:900px){
  .grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);}
  .grid--panels{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}
}
@media (min-width:1024px){
  .nav-capsule{
    position:static;
    left:auto;
    right:auto;
    top:auto;
    display:flex;
    flex:1 1 auto;
    justify-content:center;
    min-width:0;
  }
  .nav-capsule[data-open]{display:flex;}
  .nav-list{
    flex-direction:row;
    flex-wrap:nowrap;
    gap:2px;
    padding:5px;
    border-radius:var(--r-capsule);
    background:rgba(30,32,41,.72);
    box-shadow:inset 0 1px 0 rgba(192,199,209,.06);
    overflow-x:auto;
    scrollbar-width:none;
  }
  .nav-list::-webkit-scrollbar{display:none;}
  .nav-link{
    padding:9px 15px;
    border-radius:var(--r-capsule);
    font-size:13.5px;
    white-space:nowrap;
  }
  .nav-toggle{display:none;}
  .footer-grid{grid-template-columns:1.3fr .8fr .7fr 1.2fr;}
}
@media (max-width:719px){
  .header-tools .tool-btn{display:none;}
  .utility-panel{display:none;}
  .cta-link{padding:9px 13px;font-size:13px;}
}
@media (max-width:419px){
  .brand__line{display:none;}
  .nav-toggle__label{display:none;}
  .nav-toggle{padding:9px 12px;}
}

/* 12. 动效偏好
   ========================================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none;}
}