/* ==========================================================================
   博鱼电脑版 · 共享样式 /assets/site.css
   深水服务大厅：深色基底承载信息，珊瑚橙只做入口与当前状态
   ========================================================================== */

:root{
  --abyss-950:#05080F;
  --abyss-900:#0A1220;
  --abyss-800:#10203A;
  --abyss-700:#16304F;
  --coral-500:#FF6A3D;
  --coral-400:#FF8B63;
  --celadon-400:#4FD1B0;
  --celadon-600:#1E8C74;
  --amber-400:#FFC24B;
  --paper-100:#E8EDF2;
  --ink-050:#F2F6FA;
  --ink-300:#A9B8C7;

  --gutter:6vw;
  --max-w:1440px;
  --hairline:1px solid var(--abyss-700);
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:520ms;

  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body,
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0;}
ul,ol{padding:0;}
img,svg,video{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}

body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  color:var(--ink-050);
  background-color:var(--abyss-900);
  background-image:
    radial-gradient(120% 80% at 10% -12%,rgba(79,209,176,.07),transparent 58%),
    radial-gradient(90% 70% at 102% 0%,rgba(255,106,61,.06),transparent 55%),
    linear-gradient(180deg,var(--abyss-900) 0%,var(--abyss-950) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

:focus-visible{outline:2px solid var(--coral-500);outline-offset:3px;}
:focus:not(:focus-visible){outline:none;}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.hairline{border:0;height:1px;background:var(--abyss-700);margin:0;}

/* ---------- 容器 ---------- */
.wrap,
.header-inner,
.footer-inner{
  width:min(var(--max-w),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 18px;
  background:var(--paper-100);color:var(--abyss-950);
  font-size:.82rem;font-weight:700;letter-spacing:.1em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 顶部进度条 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  height:2px;width:0;
  background:var(--coral-500);
  box-shadow:0 0 12px rgba(255,106,61,.55);
}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:linear-gradient(180deg,rgba(5,8,15,.97),rgba(10,18,32,.93));
  border-bottom:var(--hairline);
  backdrop-filter:blur(10px);
}
.site-header[data-scrolled]{box-shadow:0 1px 0 rgba(22,48,79,.9),0 18px 40px -30px rgba(0,0,0,.9);}

.header-top{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(16px,2.4vw,36px);
  min-height:62px;
  padding:11px 0;
  transition:padding .28s var(--ease);
}
.site-header[data-scrolled] .header-top{padding:4px 0;}

/* 品牌 */
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:30px;height:30px;border-radius:50%;
  background:radial-gradient(circle at 32% 28%,var(--coral-400),var(--coral-500) 46%,#7C2F16 100%);
  box-shadow:0 0 0 1px rgba(255,106,61,.42),0 0 20px rgba(255,106,61,.22);
}
.brand-mark::after{
  content:"";position:absolute;left:6px;bottom:5px;
  width:6px;height:6px;border-radius:50%;
  background:rgba(232,237,242,.8);
}
.brand-text{display:block;min-width:0;}
.brand-name{display:block;font-size:1.06rem;font-weight:900;letter-spacing:.06em;line-height:1.2;}
.brand-sub{display:block;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;color:var(--ink-300);}

.brand-statement{
  align-self:center;
  padding-left:18px;
  border-left:var(--hairline);
  font-size:.82rem;
  letter-spacing:.06em;
  color:var(--ink-300);
  max-width:36em;
}

.header-actions{display:flex;align-items:center;gap:14px;justify-self:end;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.2em;
  font-size:.82rem;font-weight:600;letter-spacing:.1em;
  border:1px solid transparent;
  white-space:nowrap;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn--primary{background:var(--coral-500);border-color:var(--coral-500);color:#170709;}
.btn--primary:hover{background:var(--coral-400);border-color:var(--coral-400);}
.btn--ghost{border-color:var(--abyss-700);color:var(--ink-050);background:rgba(16,32,58,.6);}
.btn--ghost:hover{border-color:var(--celadon-400);color:var(--celadon-400);}
.btn--quiet{border-color:transparent;color:var(--ink-300);padding-inline:.5em;}
.btn--quiet:hover{color:var(--coral-400);}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 13px;
  border:var(--hairline);
  font-size:.72rem;font-weight:600;letter-spacing:.18em;
  color:var(--ink-050);
}
.nav-toggle-bars{display:flex;flex-direction:column;justify-content:center;gap:5px;width:16px;}
.nav-toggle-bar{display:block;width:16px;height:1.5px;background:var(--coral-500);transition:transform .24s var(--ease);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3.25px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-3.25px) rotate(-45deg);}

/* 第二层栏目索引 */
.site-nav{border-top:var(--hairline);}
.nav-list{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(12px,2.6vw,36px);list-style:none;padding:0;margin:0;}
.nav-item{min-width:0;}
.nav-link{
  display:inline-flex;align-items:baseline;gap:8px;
  padding:12px 0;
  font-size:.92rem;font-weight:600;letter-spacing:.06em;
  color:var(--ink-300);
  border-bottom:2px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.nav-link:hover{color:var(--ink-050);}
.nav-index{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.2em;color:rgba(169,184,199,.5);}
.nav-link[aria-current="page"]{color:var(--ink-050);border-bottom-color:var(--coral-500);}
.nav-link[aria-current="page"] .nav-index{color:var(--coral-500);}

/* ==========================================================================
   章节与排版
   ========================================================================== */
.section{padding-block:clamp(56px,9vw,132px);position:relative;}
.section--tight{padding-block:clamp(36px,5vw,72px);}
.section-head{max-width:46em;margin-bottom:clamp(22px,3vw,40px);}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ink-300);
  margin-bottom:.9em;
}
.lead{font-size:clamp(1.05rem,1.4vw,1.2rem);line-height:1.7;color:var(--ink-050);max-width:32em;}
.prose{max-width:34em;color:var(--ink-300);font-size:1rem;line-height:1.75;}
.prose p+p{margin-top:1em;}
.prose strong{color:var(--ink-050);font-weight:700;}
.prose ul,.prose ol{margin:1em 0;padding-left:1.15em;list-style:disc;}
.prose li+li{margin-top:.4em;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.12em;}
.dim{color:var(--ink-300);}

.chapter-head{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(14px,2.2vw,30px);
  align-items:start;
  margin-bottom:clamp(20px,3vw,38px);
}
.chapter-index{
  font-family:var(--font-mono);
  font-size:clamp(2.6rem,5vw,4.6rem);
  font-weight:800;line-height:.9;letter-spacing:.02em;
  color:rgba(232,237,242,.08);
  -webkit-text-stroke:1px var(--abyss-700);
  transition:color .28s var(--ease),-webkit-text-stroke-color .28s var(--ease);
}
[data-chapter][data-active] .chapter-index{color:rgba(255,106,61,.16);-webkit-text-stroke-color:var(--coral-500);}
.chapter-title{font-size:clamp(1.5rem,2.6vw,2.3rem);font-weight:800;line-height:1.25;letter-spacing:.02em;margin-bottom:.35em;}
.chapter-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink-300);opacity:.75;
}
.chapter-rule{height:1px;background:var(--abyss-700);margin:clamp(24px,4vw,52px) 0;}

/* ==========================================================================
   栅格与分屏
   ========================================================================== */
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

.split{display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,64px);align-items:start;}
.split--reverse{grid-template-columns:5fr 7fr;}

.stack{display:grid;gap:clamp(16px,2vw,28px);}

/* ==========================================================================
   卡片与面板
   ========================================================================== */
.card{
  background:var(--abyss-800);
  border:var(--hairline);
  padding:clamp(20px,2.6vw,32px);
  transition:border-color .24s var(--ease),background-color .24s var(--ease);
}
.card:hover{border-color:#1E3D63;}
.card--paper{background:var(--paper-100);color:var(--abyss-900);border-color:var(--paper-100);}
.card--paper .card-meta{color:#5A6B7C;}
.card--paper .card-title{color:var(--abyss-950);}
.card--console{
  background:linear-gradient(180deg,rgba(16,32,58,.92),rgba(5,8,15,.92));
  border:var(--hairline);
}
.card-title{font-size:1.16rem;font-weight:800;letter-spacing:.03em;line-height:1.35;margin-bottom:.5em;}
.card-meta{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;color:var(--ink-300);text-transform:uppercase;}
.card-body{color:var(--ink-300);font-size:.95rem;line-height:1.75;}

/* 印刷叠层 */
.plate{position:relative;isolation:isolate;}
.plate::after{
  content:"";position:absolute;inset:8px -8px -8px 8px;
  border:1px solid rgba(232,237,242,.14);
  pointer-events:none;z-index:-1;
}

/* 控制台面板 */
.console{
  display:grid;gap:10px;
  background:linear-gradient(180deg,rgba(16,32,58,.9),rgba(5,8,15,.92));
  border:var(--hairline);
  padding:18px 20px;
  font-size:.8rem;
}
.console-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:9px;
  border-bottom:1px dashed rgba(22,48,79,.9);
}
.console-row:last-child{border-bottom:0;padding-bottom:0;}
.console-key{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;color:var(--ink-300);text-transform:uppercase;}
.console-val{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.1em;color:var(--ink-050);}

/* 状态 */
.status{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;letter-spacing:.08em;color:var(--ink-300);}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ink-300);flex:0 0 auto;}
.status--ok{color:var(--celadon-400);}
.status--ok .dot{background:var(--celadon-400);box-shadow:0 0 0 3px rgba(79,209,176,.16);}
.status--warn{color:var(--amber-400);}
.status--warn .dot{background:var(--amber-400);box-shadow:0 0 0 3px rgba(255,194,75,.16);}
.status--idle{color:var(--ink-300);}
.status--idle .dot{background:var(--abyss-700);}

/* 标签 */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.16em;
  border:1px solid var(--abyss-700);
  color:var(--ink-300);
}
.tag--coral{border-color:rgba(255,106,61,.55);color:var(--coral-400);}
.tag--celadon{border-color:rgba(79,209,176,.5);color:var(--celadon-400);}
.tag--amber{border-color:rgba(255,194,75,.5);color:var(--amber-400);}

/* 面包屑 */
.crumbs{margin-bottom:clamp(18px,3vw,30px);}
.crumbs-list{display:flex;flex-wrap:wrap;align-items:center;list-style:none;padding:0;margin:0;font-size:.76rem;letter-spacing:.12em;color:var(--ink-300);}
.crumbs-item{display:inline-flex;align-items:center;}
.crumbs-item+.crumbs-item::before{content:"/";margin:0 10px;color:var(--abyss-700);}
.crumbs-item a{color:var(--ink-300);transition:color .2s var(--ease);}
.crumbs-item a:hover{color:var(--coral-400);}
.crumbs-item [aria-current="page"]{color:var(--ink-050);}

/* ==========================================================================
   图片容器（页面阶段放置图片占位）
   ========================================================================== */
.frame{
  position:relative;display:block;width:100%;
  overflow:hidden;
  border:var(--hairline);
  background-image:
    radial-gradient(120% 90% at 18% 0%,rgba(79,209,176,.10),transparent 60%),
    radial-gradient(90% 70% at 100% 100%,rgba(255,106,61,.08),transparent 58%),
    linear-gradient(160deg,var(--abyss-800),var(--abyss-950));
}
.frame img,
.frame picture,
.frame picture img{width:100%;height:100%;object-fit:cover;}
.frame--wide{aspect-ratio:16/9;}
.frame--ultrawide{aspect-ratio:21/9;}
.frame--tall{aspect-ratio:3/4;}
.frame--square{aspect-ratio:1/1;}
.frame-cap{margin-top:10px;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;color:var(--ink-300);}

/* 水纹气泡装饰层 */
.ambient{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0;}
.ambient::before,
.ambient::after{
  content:"";position:absolute;border-radius:50%;
  background:radial-gradient(circle at 34% 30%,rgba(79,209,176,.22),transparent 62%);
  animation:drift 16s var(--ease) infinite alternate;
}
.ambient::before{width:230px;height:230px;left:8%;top:14%;}
.ambient::after{
  width:150px;height:150px;right:13%;bottom:16%;
  background:radial-gradient(circle at 40% 34%,rgba(255,106,61,.18),transparent 62%);
  animation-duration:20s;animation-delay:-6s;
}
@keyframes drift{
  from{transform:translate3d(0,0,0);}
  to{transform:translate3d(18px,-24px,0);}
}

/* 滚动显现 */
html.js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none;}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,10vw,140px);
  background:var(--abyss-950);
  border-top:var(--hairline);
  color:var(--ink-300);
}
.footer-watermark{
  position:absolute;inset:0;overflow:hidden;pointer-events:none;opacity:.14;
  background-image:
    radial-gradient(60% 120% at 12% 0%,rgba(79,209,176,.5),transparent 60%),
    radial-gradient(50% 120% at 92% 100%,rgba(255,106,61,.42),transparent 62%);
}
.footer-inner{position:relative;z-index:1;padding-block:clamp(44px,6vw,80px) clamp(24px,3vw,36px);}

.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1.25fr;
  gap:clamp(22px,3vw,44px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:var(--hairline);
}
.footer-col{min-width:0;}
.footer-col--brand{display:grid;gap:14px;align-content:start;}

.brand--footer .brand-name{font-size:1rem;color:var(--ink-050);}
.brand--footer .brand-sub{color:var(--ink-300);}

.footer-heading{
  font-family:var(--font-mono);
  font-size:.72rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--paper-100);
  margin-bottom:1.1em;
}
.footer-list{list-style:none;padding:0;margin:0;display:grid;gap:.6em;}
.footer-link{
  font-size:.88rem;letter-spacing:.05em;color:var(--ink-300);
  transition:color .2s var(--ease);
}
.footer-link:hover{color:var(--coral-400);}

.footer-contact{list-style:none;padding:0;margin:0;display:grid;gap:.8em;font-size:.86rem;line-height:1.7;}
.footer-contact li{overflow-wrap:anywhere;}
.footer-key{
  display:block;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;
  color:rgba(169,184,199,.7);
}
.footer-note{font-size:.82rem;line-height:1.7;color:var(--ink-300);}
.footer-note--dim{color:rgba(169,184,199,.68);font-size:.78rem;}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:clamp(18px,2.4vw,28px);
}
.footer-icp,
.footer-copy,
.footer-legal{
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.14em;
  color:rgba(232,237,242,.72);
}
.footer-copy{font-variant-numeric:tabular-nums;}
.footer-legal{display:inline-flex;align-items:center;gap:10px;}
.footer-sep{color:var(--abyss-700);}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1200px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;}
  .footer-col--brand{grid-column:1 / -1;}
}

@media (max-width:1023px){
  :root{--gutter:20px;}
  .header-top{grid-template-columns:minmax(0,1fr) auto;gap:16px;}
  .brand-statement{display:none;}
  .nav-toggle{display:inline-flex;}
  .site-nav{display:none;padding:6px 0 14px;}
  .site-nav[data-open]{display:block;animation:navDrop .24s var(--ease);}
  .nav-list{flex-direction:column;gap:0;}
  .nav-item{width:100%;border-bottom:1px solid rgba(22,48,79,.75);}
  .nav-item:last-child{border-bottom:0;}
  .nav-link{display:flex;width:100%;padding:15px 2px;font-size:1rem;}
  .split,
  .split--reverse{grid-template-columns:1fr;}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12;}
  .grid-12{gap:16px;}
  .chapter-note{display:none;}
}
@keyframes navDrop{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:none;}
}

@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .btn{padding:.68em 1em;font-size:.78rem;}
  .header-actions{gap:10px;}
}

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