/* =========================================================
   Site Kit — 龙8开服 / 龙鳞导航图
   /assets/site.css
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--jade);outline-offset:3px}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0B0D10;
  --ink-2:#14181D;
  --ink-3:#1B2129;
  --gold:#D4A017;
  --gold-line:#6B5310;
  --lava:#FF6B35;
  --lava-deep:#8C2F0D;
  --jade:#2EC4B6;
  --jade-soft:#7FE3DA;
  --platinum:#F2F4F6;
  --mist:#9AA3AD;

  --rail-w:240px;
  --topbar-h:66px;
  --max-w:1280px;
  --gutter:clamp(18px,3.4vw,40px);
  --ease:cubic-bezier(.2,.7,.2,1);

  --font-display:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-body:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;

  --scales:
    repeating-linear-gradient(45deg,rgba(212,160,23,.11) 0 1px,transparent 1px 15px),
    repeating-linear-gradient(-45deg,rgba(212,160,23,.11) 0 1px,transparent 1px 15px);
}

/* ---------- 3. Base / 中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 640px at 84% -12%,rgba(212,160,23,.10),transparent 62%),
    radial-gradient(900px 520px at 2% 106%,rgba(46,196,182,.06),transparent 62%);
  background-attachment:fixed;
  color:var(--platinum);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-nav-open{overflow:hidden}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.06;text-wrap:balance}
p{text-wrap:pretty}
::selection{background:var(--gold);color:var(--ink)}

/* ---------- 4. 通用排版与容器 ---------- */
.content-shell{
  width:100%;
  max-width:var(--max-w);
  margin-inline:auto;
  padding:clamp(28px,4vw,56px) var(--gutter);
}
.section{padding-block:clamp(30px,5vw,72px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);flex:0 0 auto}
.h-display{font-family:var(--font-display);font-weight:900;letter-spacing:-.025em;line-height:1.02}
.lede{
  max-width:62ch;
  font-size:clamp(15px,1.3vw,18px);
  line-height:1.75;
  color:var(--mist);
}
.rule{height:0;border:0;border-top:1px solid var(--gold-line);margin-block:clamp(20px,3vw,32px)}
.panel{
  background:var(--ink-2);
  border:1px solid var(--gold-line);
  padding:clamp(18px,2.4vw,28px);
}

/* ---------- 5. 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumbs a{color:var(--mist);transition:color .22s var(--ease)}
.breadcrumbs a:hover{color:var(--gold)}
.breadcrumbs [aria-current="page"]{color:var(--platinum)}
.breadcrumbs__sep{color:var(--gold-line)}

/* ---------- 6. 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--platinum);
  --btn-line:var(--gold);
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-family:var(--font-body);
  font-size:14px;font-weight:800;letter-spacing:.04em;
  white-space:nowrap;
  color:var(--btn-fg);
  background:var(--btn-bg);
  border:1px solid var(--btn-line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  overflow:hidden;
  transition:color .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease);
}
.btn::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(100deg,transparent 18%,rgba(212,160,23,.32) 50%,transparent 82%);
  transform:translateX(-115%);
  transition:transform .4s var(--ease);
}
.btn:hover::after,.btn:focus-visible::after{transform:translateX(115%)}
.btn--primary{background:var(--lava);border-color:var(--lava);color:var(--ink);font-weight:900}
.btn--primary:hover{background:#FF8358;border-color:#FF8358}
.btn--ghost{background:transparent;border-color:var(--gold);color:var(--gold)}
.btn--ghost:hover{background:rgba(212,160,23,.14);color:var(--platinum)}

/* ---------- 7. 图片容器（页面阶段放占位） ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  background:linear-gradient(160deg,var(--ink-3),var(--ink));
  border:1px solid var(--gold-line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.media>img,.media>picture>img,.media>svg{display:block;width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:var(--scales);
  opacity:.42;
  mask-image:linear-gradient(180deg,transparent 30%,#000 100%);
  -webkit-mask-image:linear-gradient(180deg,transparent 30%,#000 100%);
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x2{aspect-ratio:3/2}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media__cap{
  display:block;margin-top:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
}

/* ---------- 8. 站点外壳 ---------- */
.site-header{position:sticky;top:0;z-index:60}

.skip-link{
  position:absolute;top:-80px;left:12px;z-index:300;
  padding:10px 18px;
  background:var(--gold);color:var(--ink);
  font-weight:800;font-size:14px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}

/* ---------- 9. 左轨 / 抽屉 ---------- */
.rail{
  position:fixed;top:0;left:0;z-index:90;
  display:flex;flex-direction:column;gap:18px;
  width:var(--rail-w);height:100vh;height:100dvh;
  padding:24px 18px 20px;
  background:linear-gradient(180deg,rgba(20,24,29,.99),rgba(11,13,16,.99));
  border-right:1px solid var(--gold-line);
  overflow-y:auto;overscroll-behavior:contain;
}
.rail::before{
  content:"";position:absolute;inset:0 0 auto 0;height:190px;pointer-events:none;
  background:var(--scales);
  opacity:.9;
  mask-image:linear-gradient(180deg,#000,transparent);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent);
}
.rail__close{
  display:none;
  position:absolute;top:14px;right:14px;z-index:2;
  width:34px;height:34px;
  align-items:center;justify-content:center;
  border:1px solid var(--gold-line);
  color:var(--gold);font-size:18px;line-height:1;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.rail__close:hover{background:var(--gold);color:var(--ink);border-color:var(--gold)}

/* 品牌 */
.brand{position:relative;display:flex;align-items:center;gap:11px}
.brand__mark{width:36px;height:36px;flex:0 0 auto}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-display);font-weight:900;font-size:18px;
  letter-spacing:-.01em;line-height:1.15;color:var(--platinum);
}
.brand__sub{
  margin-top:3px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--gold);text-transform:uppercase;
}

/* 轨道导航 */
.rail__nav{position:relative;flex:1 1 auto;margin-top:6px}
.rail__list{display:flex;flex-direction:column;gap:2px}
.rail__link{
  position:relative;
  display:grid;grid-template-columns:32px 1fr;align-items:center;gap:6px;
  padding:11px 26px 11px 9px;
  border-left:2px solid transparent;
  color:var(--mist);
  font-size:14px;font-weight:600;line-height:1.35;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.rail__idx{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--gold-line);
  transition:color .22s var(--ease);
}
.rail__label{min-width:0}
.rail__link:hover{
  color:var(--platinum);
  border-left-color:var(--gold);
  background:linear-gradient(90deg,rgba(212,160,23,.13),transparent 72%);
}
.rail__link:hover .rail__idx{color:var(--gold)}
.rail__link[aria-current="page"]{
  color:var(--platinum);
  border-left-color:var(--lava);
  background:linear-gradient(90deg,rgba(255,107,53,.17),transparent 76%);
}
.rail__link[aria-current="page"] .rail__idx{color:var(--lava)}
.rail__link[aria-current="page"]::after{
  content:"";position:absolute;right:10px;top:50%;
  width:6px;height:6px;margin-top:-3px;
  background:var(--lava);
  transform:rotate(45deg);
}

/* 轨道底部信息 */
.rail__meta{
  position:relative;
  display:grid;gap:2px;
  padding-top:14px;
  border-top:1px solid var(--gold-line);
}
.rail__meta-label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--mist);text-transform:uppercase;margin-top:8px;
}
.rail__meta-value{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--jade);
}

/* ---------- 10. 顶部工具条 ---------- */
.topbar{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(10px,2vw,24px);
  min-height:var(--topbar-h);
  padding:10px var(--gutter);
  background:rgba(11,13,16,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--gold-line);
}
.topbar__lead{display:flex;align-items:center;gap:14px;min-width:0}
.topbar__tools{display:flex;align-items:center;gap:clamp(8px,1.6vw,20px)}
.topbar__tag{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.18em;
  color:var(--gold-line);
  white-space:nowrap;
}
.topbar__brand{display:none;font-family:var(--font-display);font-weight:900;font-size:17px;letter-spacing:-.01em}
.topbar__cta{padding:10px 18px;font-size:13px}

/* 倒计时 */
.countdown{
  display:flex;align-items:baseline;gap:8px;
  padding:6px 12px;
  border:1px solid var(--gold-line);
  background:linear-gradient(180deg,rgba(255,107,53,.12),transparent);
}
.countdown__label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--mist);white-space:nowrap;
}
.countdown__value{
  font-family:var(--font-mono);
  font-size:14px;font-weight:700;letter-spacing:.08em;
  color:var(--lava);
  font-variant-numeric:tabular-nums;
}

/* 汉堡 */
.nav-toggle{
  display:none;
  align-items:center;gap:9px;
  padding:8px 12px;
  border:1px solid var(--gold-line);
  color:var(--platinum);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(212,160,23,.1)}
.nav-toggle__bars{display:grid;gap:3px;width:16px}
.nav-toggle__bars span{
  display:block;height:2px;background:var(--gold);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 滚动进度 */
.topbar__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden}
.topbar__progress-bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--lava));
}

/* 遮罩 */
.nav-scrim{
  position:fixed;inset:0;z-index:85;
  background:rgba(4,6,8,.74);
  -webkit-backdrop-filter:blur(3px);
  backdrop-filter:blur(3px);
  opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,96px);
  padding-top:clamp(40px,5vw,72px);
  background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);
  border-top:1px solid var(--gold-line);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:var(--scales);
  opacity:.7;
  mask-image:linear-gradient(180deg,#000,transparent 72%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 72%);
}
.footer__inner{
  position:relative;z-index:1;
  max-width:var(--max-w);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,3.4vw,44px);
}
.footer__col{min-width:0}
.footer__col--brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.brand--footer .brand__mark{width:42px;height:42px}
.brand--footer .brand__name{font-size:20px}
.footer__blurb{
  max-width:34ch;
  font-size:14px;line-height:1.75;color:var(--mist);
}
.badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 13px;
  border:1px solid var(--jade);
  color:var(--jade);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  white-space:nowrap;
}
.badge::before{
  content:"";width:6px;height:6px;flex:0 0 auto;
  background:var(--jade);transform:rotate(45deg);
}
.footer__title{
  font-family:var(--font-mono);
  font-size:11px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);
  margin-bottom:16px;
}
.footer__list{display:grid;gap:10px}
.footer__link{
  display:inline-block;
  font-size:14px;color:var(--mist);
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer__link:hover{color:var(--platinum);transform:translateX(3px)}
.footer__list--meta{gap:12px}
.footer__list--meta li{display:grid;gap:2px}
.footer__key{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--gold-line);text-transform:uppercase;
}
.footer__val{
  font-size:13.5px;line-height:1.65;color:var(--mist);
  overflow-wrap:anywhere;
}
.footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;
  margin-top:clamp(30px,4vw,56px);
  padding-block:20px 26px;
  border-top:1px solid var(--gold-line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--mist);
}
.footer__legal,.footer__note{margin:0}

/* 返回顶部 */
.to-top{
  position:fixed;right:clamp(14px,2vw,28px);bottom:clamp(14px,2vw,28px);
  z-index:80;
  width:48px;height:48px;
  display:grid;place-items:center;
  background:var(--ink-2);
  color:var(--gold);
  border:1px solid var(--gold);
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease),background .22s var(--ease),color .22s var(--ease);
}
.to-top svg{width:20px;height:20px}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--gold);color:var(--ink)}

/* ---------- 12. 显现 ---------- */
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
html.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1023px){
  .rail{
    width:min(310px,86vw);
    z-index:95;
    transform:translateX(-104%);
    visibility:hidden;
    box-shadow:24px 0 64px rgba(0,0,0,.62);
    transition:transform .34s var(--ease),visibility .34s var(--ease);
  }
  .site-header[data-open] .rail{transform:none;visibility:visible}
  .site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}
  .rail__close{display:flex}
  .nav-toggle{display:inline-flex}
  .topbar__brand{display:inline-flex}
  .topbar__tag{display:none}
}

@media (min-width:600px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (min-width:768px){
  .footer__grid{grid-template-columns:1.5fr 1fr}
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .rail{transform:none;visibility:visible}
  .nav-scrim{display:none}
  .footer__grid{grid-template-columns:1.45fr .95fr 1.35fr .95fr;gap:clamp(24px,3vw,48px)}
  .footer__col + .footer__col{
    border-left:1px solid var(--gold-line);
    padding-left:clamp(18px,2vw,30px);
  }
}

@media (max-width:639px){
  .countdown__label{display:none}
  .countdown{padding:6px 9px}
  .countdown__value{font-size:13px}
  .topbar__cta{padding:9px 13px;font-size:12px;letter-spacing:.02em}
  .nav-toggle__text{display:none}
}

@media (max-width:380px){
  .topbar__brand{font-size:15px}
}

/* ---------- 14. 无障碍与减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .btn::after{display:none}
  html.js-reveal [data-reveal]{opacity:1;transform:none}
  .to-top{transform:none}
}