/* ============================================================
   博鱼品牌站 · 共享样式表 /assets/site.css
   潮汐钟视觉系统：深海蓝底 + 电光青脉冲 + 珊瑚橙行动色
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --deep-900:#071A2B;
  --deep-800:#0A2236;
  --deep-700:#0E2C44;
  --deep-600:#133A56;

  --cyan-500:#19D3C5;
  --cyan-300:#7FF0E4;
  --coral-500:#FF6B4A;
  --amber-400:#F5B942;
  --mint-400:#58D8A3;

  --white-050:#F3F7FA;
  --gray-400:#8FA3B5;

  --line:rgba(127,240,228,.16);
  --line-soft:rgba(127,240,228,.09);
  --glass:rgba(14,44,68,.58);
  --glass-strong:rgba(14,44,68,.82);

  --font-head:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,monospace;

  --shell:1220px;
  --gutter:clamp(20px,4vw,48px);
  --radius:14px;
  --radius-lg:20px;
  --header-h:72px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  min-height:100%;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--white-050);
  background-color:var(--deep-900);
  background-image:
    radial-gradient(1100px 620px at 8% -14%, rgba(25,211,197,.18), transparent 62%),
    radial-gradient(900px 520px at 96% 2%, rgba(255,107,74,.12), transparent 64%),
    radial-gradient(1200px 720px at 50% 110%, rgba(25,211,197,.09), transparent 68%);
  background-attachment:fixed;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(143,163,181,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143,163,181,.05) 1px, transparent 1px);
  background-size:88px 88px;
  -webkit-mask-image:radial-gradient(125% 92% at 50% 0%, #000 18%, transparent 76%);
  mask-image:radial-gradient(125% 92% at 50% 0%, #000 18%, transparent 76%);
}

img,svg,video,canvas{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;}
button,input,select,textarea{font:inherit;color:inherit;}

/* ---------- 3. 基础排版 ---------- */
h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.24;
  letter-spacing:-.01em;
  margin:0 0 .6em;
  color:var(--white-050);
}
h1{font-size:clamp(2.1rem,4.6vw,3.3rem);font-weight:800;letter-spacing:-.02em;}
h2{font-size:clamp(1.5rem,2.8vw,2.1rem);}
h3{font-size:clamp(1.15rem,1.9vw,1.4rem);}
h4{font-size:1.05rem;}

p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

a{
  color:var(--cyan-300);
  text-decoration:underline;
  text-decoration-color:rgba(127,240,228,.42);
  text-underline-offset:3px;
  transition:color .2s var(--ease), text-decoration-color .2s var(--ease);
}
a:hover{color:#fff;text-decoration-color:var(--cyan-500);}

strong{color:#fff;font-weight:700;}

code,kbd,samp{
  font-family:var(--font-mono);
  font-size:.88em;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(25,211,197,.10);
  color:var(--cyan-300);
}

hr{border:0;height:1px;background:var(--line);margin:2em 0;}

:focus-visible{
  outline:2px solid var(--cyan-300);
  outline-offset:3px;
}

/* ---------- 4. 布局骨架 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(48px,7vw,96px);}
.section--tight{padding-block:clamp(30px,4vw,56px);}

#main-content{
  display:block;
  position:relative;
  z-index:1;
  scroll-margin-top:calc(var(--header-h) + 18px);
}

.site-header,.site-footer{position:relative;z-index:1;}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,28px);
}
.col-4{grid-column:span 4;}
.col-6{grid-column:span 6;}
.col-8{grid-column:span 8;}
.col-12{grid-column:1 / -1;}

@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-4{grid-column:span 3;}
  .col-6{grid-column:span 6;}
  .col-8{grid-column:span 6;}
}
@media (max-width:640px){
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .col-4,.col-6,.col-8{grid-column:1 / -1;}
}

/* ---------- 5. Skip link ---------- */
.skip-link{
  position:absolute;
  left:20px;
  top:-72px;
  z-index:200;
  padding:10px 20px;
  border-radius:0 0 12px 12px;
  background:var(--cyan-500);
  color:#04121C;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  font-weight:700;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0;color:#04121C;}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,26,43,.94);
  border-bottom:1px solid var(--line);
}

.header-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  min-height:var(--header-h);
  padding:12px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:13px;
  text-decoration:none;
  color:var(--white-050);
  flex:0 0 auto;
}
.brand:hover{color:var(--white-050);}

.brand-mark{
  position:relative;
  width:36px;
  height:36px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid rgba(25,211,197,.5);
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:4px;
  border-radius:50%;
  border:1px solid rgba(25,211,197,.28);
  animation:tide-pulse 3.6s var(--ease) infinite;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:-1px;
  border-radius:50%;
  border-top:2px solid var(--cyan-500);
  opacity:.85;
  animation:brand-sweep 6s linear infinite;
}
.brand-core{
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--cyan-500);
  box-shadow:0 0 16px rgba(25,211,197,.85);
}

@keyframes tide-pulse{
  0%{transform:scale(.86);opacity:.9;}
  70%{transform:scale(1.18);opacity:0;}
  100%{transform:scale(1.18);opacity:0;}
}
@keyframes brand-sweep{
  to{transform:rotate(360deg);}
}

.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{
  font-family:var(--font-head);
  font-weight:800;
  font-size:17px;
  letter-spacing:.02em;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--cyan-300);
  opacity:.72;
  margin-top:1px;
}

.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 1 auto;
}

/* 导航 */
.site-nav{display:flex;align-items:center;}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 13px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:14.5px;
  color:var(--gray-400);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.nav-link:hover{
  color:var(--cyan-300);
  background:rgba(25,211,197,.08);
  border-color:rgba(25,211,197,.28);
  text-decoration:none;
}
.nav-link[aria-current="page"]{
  color:var(--white-050);
  background:rgba(25,211,197,.13);
  border-color:rgba(25,211,197,.46);
}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-9px;
  width:5px;
  height:5px;
  margin-left:-2.5px;
  border-radius:50%;
  background:var(--cyan-500);
  box-shadow:0 0 10px rgba(25,211,197,.9);
}

.nav-foot{
  display:none;
  margin:24px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gray-400);
}

.header-cta{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  padding:9px 17px;
  border-radius:999px;
  border:1px solid var(--coral-500);
  color:var(--coral-500);
  text-decoration:none;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.header-cta:hover{
  background:var(--coral-500);
  color:#08131F;
  text-decoration:none;
  box-shadow:0 0 26px rgba(255,107,74,.4);
}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  position:relative;
  z-index:80;
  width:44px;
  height:40px;
  padding:0;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(14,44,68,.65);
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(25,211,197,.45);background:rgba(25,211,197,.10);}
.nav-toggle-bar{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--cyan-300);
  transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 滚动进度刻度 */
.scroll-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(127,240,228,.08);
  pointer-events:none;
  overflow:hidden;
}
.scroll-rail-fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan-500),var(--cyan-300) 58%,var(--coral-500));
}

/* ---------- 7. 移动端导航 ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    right:0;
    bottom:0;
    width:min(86vw,360px);
    padding:30px 24px 40px;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    background:linear-gradient(180deg,var(--deep-700),var(--deep-900));
    border-left:1px solid var(--line);
    box-shadow:-30px 0 70px rgba(0,0,0,.55);
    transform:translateX(103%);
    visibility:hidden;
    overflow-y:auto;
    z-index:70;
    transition:transform .34s var(--ease),visibility .34s var(--ease);
  }
  .site-header[data-open] .site-nav{
    transform:translateX(0);
    visibility:visible;
  }
  .site-header[data-open] .nav-toggle-bar{background:var(--cyan-500);}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .nav-link{
    display:block;
    padding:14px 16px;
    border-radius:12px;
    border-left:2px solid transparent;
    font-size:16px;
  }
  .nav-link[aria-current="page"]{
    border-left-color:var(--cyan-500);
  }
  .nav-link[aria-current="page"]::after{display:none;}

  .nav-foot{
    display:block;
    padding-top:18px;
    border-top:1px solid var(--line-soft);
  }
}

@media (max-width:600px){
  .header-cta{display:none;}
  .brand-sub{letter-spacing:.14em;}
}
@media (max-width:400px){
  .brand-sub{display:none;}
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,rgba(7,26,43,.35),rgba(10,34,54,.92));
  border-top:1px solid var(--line);
}

.footer-ticks{
  height:12px;
  background-image:repeating-linear-gradient(90deg,
    rgba(127,240,228,.20) 0 1px,
    transparent 1px 14px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  opacity:.7;
  pointer-events:none;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(24px,3.4vw,48px);
  padding-block:clamp(38px,5vw,64px);
}

.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-note{
  margin:0;
  max-width:34ch;
  font-size:14.5px;
  color:var(--gray-400);
}
.footer-duty{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--cyan-300);
}
.pulse-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--mint-400);
  box-shadow:0 0 0 0 rgba(88,216,163,.6);
  animation:duty-pulse 2.6s var(--ease) infinite;
  flex:0 0 auto;
}
@keyframes duty-pulse{
  0%{box-shadow:0 0 0 0 rgba(88,216,163,.55);}
  70%{box-shadow:0 0 0 9px rgba(88,216,163,0);}
  100%{box-shadow:0 0 0 0 rgba(88,216,163,0);}
}

.footer-col{display:flex;flex-direction:column;gap:14px;}
.footer-title{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-300);
  opacity:.85;
}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:9px;}
.footer-list a{
  font-size:14.5px;
  color:var(--gray-400);
  text-decoration:none;
  transition:color .2s var(--ease),letter-spacing .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan-300);letter-spacing:.02em;}

.footer-meta{
  margin:0;
  display:grid;
  gap:8px;
  font-size:13.5px;
}
.footer-meta dt{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan-300);
  opacity:.75;
}
.footer-meta dd{
  margin:0 0 4px;
  color:var(--gray-400);
  line-height:1.6;
  word-break:break-word;
}
.footer-cta{align-self:flex-start;margin-top:4px;}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:20px 26px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--gray-400);
}
.footer-base p{margin:0;}

@media (max-width:960px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

/* ---------- 9. 面板 / 玻璃层 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--glass);
  overflow:hidden;
}
.panel--solid{
  background:var(--deep-700);
  border-color:var(--line-soft);
}
.panel--edge::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:3px;
  background:linear-gradient(180deg,var(--cyan-500),rgba(25,211,197,0));
}

/* ---------- 10. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  background:transparent;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  text-decoration:none;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),
             border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{text-decoration:none;}

.btn--coral{border-color:var(--coral-500);color:var(--coral-500);}
.btn--coral:hover{background:var(--coral-500);color:#08131F;box-shadow:0 0 30px rgba(255,107,74,.38);}

.btn--cyan{border-color:var(--cyan-500);color:var(--cyan-300);}
.btn--cyan:hover{background:var(--cyan-500);color:#04121C;box-shadow:0 0 30px rgba(25,211,197,.35);}

.btn--solid{background:var(--cyan-500);border-color:var(--cyan-500);color:#04121C;}
.btn--solid:hover{background:var(--cyan-300);border-color:var(--cyan-300);color:#04121C;}

/* ---------- 11. 索引元素 / 标签 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan-300);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
  opacity:.6;
  flex:0 0 auto;
}

.timecode{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
  color:var(--cyan-300);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid currentColor;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.65;
  white-space:nowrap;
}
.tag--notice{color:var(--amber-400);background:rgba(245,185,66,.10);}
.tag--review{color:var(--mint-400);background:rgba(88,216,163,.10);}
.tag--contact{color:var(--coral-500);background:rgba(255,107,74,.10);}
.tag--live{color:var(--cyan-300);background:rgba(25,211,197,.10);}
.tag--meta{color:var(--gray-400);background:rgba(143,163,181,.08);}

/* ---------- 12. 面包屑 / 区块头 ---------- */
.crumbs{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gray-400);
}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li + li::before{content:"/";color:var(--gray-400);opacity:.5;}
.crumbs a{color:var(--gray-400);text-decoration:none;}
.crumbs a:hover{color:var(--cyan-300);}
.crumbs [aria-current="page"]{color:var(--cyan-300);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 32px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-head h2{margin:0;}
.section-head p{margin:0;font-size:15px;color:var(--gray-400);}

/* ---------- 13. 时间轴 ---------- */
.timeline{
  position:relative;
  list-style:none;
  margin:0;
  padding:0;
}
.timeline::before{
  content:"";
  position:absolute;
  left:11px;
  top:8px;
  bottom:8px;
  width:2px;
  background:linear-gradient(180deg,
    rgba(25,211,197,.55),
    rgba(25,211,197,.10));
}

.tl-item{
  position:relative;
  padding-left:44px;
  padding-bottom:clamp(24px,3.4vw,40px);
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:4px;
  top:16px;
  width:16px;
  height:16px;
  border-radius:50%;
  border:2px solid var(--cyan-500);
  background:var(--deep-900);
  transition:background .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.tl-item[data-active]::before{
  background:var(--cyan-500);
  border-color:var(--cyan-300);
  box-shadow:0 0 0 6px rgba(25,211,197,.14),0 0 22px rgba(25,211,197,.65);
}

.tl-date{
  display:block;
  margin-bottom:6px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--cyan-300);
}

/* ---------- 14. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:
    linear-gradient(158deg,rgba(25,211,197,.16),rgba(7,26,43,0) 58%),
    linear-gradient(20deg,rgba(255,107,74,.13),rgba(7,26,43,0) 62%),
    var(--deep-700);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,rgba(7,26,43,0) 48%,rgba(7,26,43,.58)),
    repeating-linear-gradient(0deg,rgba(127,240,228,.055) 0 1px,transparent 1px 6px);
}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame figcaption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:14px;
  z-index:1;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--cyan-300);
}

/* ---------- 15. 正文与分隔 ---------- */
.prose{
  max-width:70ch;
  color:#DCE7F0;
}
.prose h2{margin-top:1.7em;}
.prose h3{margin-top:1.4em;}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em;}
.prose li{margin-bottom:.45em;}
.prose blockquote{
  margin:1.6em 0;
  padding:14px 20px;
  border-left:3px solid var(--cyan-500);
  background:rgba(25,211,197,.06);
  border-radius:0 12px 12px 0;
  color:var(--gray-400);
}

.tide-rule{
  height:1px;
  border:0;
  margin:clamp(32px,5vw,64px) 0;
  background:linear-gradient(90deg,
    transparent,
    rgba(127,240,228,.34) 18%,
    rgba(127,240,228,.34) 82%,
    transparent);
}

/* ---------- 16. 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;
    scroll-behavior:auto !important;
  }
  .scroll-rail-fill{transition:none !important;}
}