/* ============================================================
   BEPLAY 共享外壳样式 /assets/site.css
   控制台式深海蓝 + 纸张叠层索引
   ============================================================ */

:root{
  --sea:#0B3B5C;
  --navy:#06283D;
  --navy-deep:#041B2A;
  --sea-lift:#0E4A73;
  --coral:#FF6B4A;
  --coral-hi:#FF886C;
  --cyan:#3DE0D0;
  --sand:#E9E2D0;
  --paper:#F7F4EC;
  --stone:#6B7A86;
  --ink:#101820;
  --teal:#1F9D8B;
  --amber:#F2B84B;

  --line-light:rgba(233,226,208,.18);
  --line-dark:rgba(11,59,92,.16);
  --ink-soft:rgba(16,24,32,.68);

  --rail-w:78px;
  --shell-w:1240px;

  --font-sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fs-display:clamp(2.5rem,6vw,4.5rem);
  --fs-h2:clamp(1.55rem,3vw,2.25rem);
  --fs-h3:clamp(1.12rem,1.8vw,1.4rem);
  --fs-body:clamp(1rem,1.05vw,1.0625rem);
  --fs-small:.8125rem;

  --r-pill:999px;
  --r-card:16px;
  --r-sm:10px;

  --dur:220ms;
  --dur-fast:160ms;
  --ease:cubic-bezier(.22,.61,.36,1);

  --shadow-island:0 22px 46px -28px rgba(4,27,42,.92);
  --shadow-paper:10px 10px 0 -1px var(--sand);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;background:var(--paper)}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.16}
p{margin:0}
ul,ol{margin:0;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;cursor:pointer}
table{border-collapse:collapse}
::selection{background:var(--coral);color:var(--ink)}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:3px solid var(--coral);
  outline-offset:3px;
  box-shadow:0 0 0 2px var(--cyan);
}
:where([id]){scroll-margin-top:clamp(88px,13vh,124px)}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:14px;top:14px;z-index:200;
  transform:translateY(-180%);
  display:inline-flex;align-items:center;
  padding:11px 20px;border-radius:var(--r-pill);
  background:var(--coral);color:var(--ink);
  font-size:.875rem;font-weight:800;letter-spacing:.02em;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ============================================================
   左侧固定纵向轨道
   ============================================================ */
.rail{display:none}

@media (min-width:1080px){
  body{padding-left:var(--rail-w)}
  .rail{
    position:fixed;inset:0 auto 0 0;width:var(--rail-w);z-index:70;
    display:flex;flex-direction:column;align-items:center;justify-content:space-between;
    padding:24px 0 26px;
    background:linear-gradient(180deg,var(--navy) 0%,var(--sea) 58%,var(--sea-lift) 100%);
    border-right:1px solid rgba(61,224,208,.22);
    box-shadow:inset -14px 0 26px -22px rgba(0,0,0,.8);
  }
  .rail__mark{
    display:grid;place-items:center;
    width:36px;height:36px;border-radius:11px;
    border:1px solid rgba(61,224,208,.55);
    color:var(--cyan);
    font-family:var(--font-mono);font-size:15px;font-weight:700;
  }
  .rail__track{
    display:flex;flex-direction:column;align-items:center;gap:14px;
  }
  .rail__tick{
    display:block;width:16px;height:1px;
    background:rgba(233,226,208,.42);
  }
  .rail__tick:nth-child(2){width:10px;background:var(--cyan)}
  .rail__tick:nth-child(3){width:22px;background:rgba(233,226,208,.28)}
  .rail__tick:nth-child(4){width:10px;background:rgba(233,226,208,.42)}
  .rail__label{
    writing-mode:vertical-rl;
    font-size:11px;letter-spacing:.32em;
    color:rgba(233,226,208,.6);
    font-family:var(--font-mono);
  }
}

/* ============================================================
   悬浮胶囊导航
   ============================================================ */
.site-header{position:relative;z-index:80}

.masthead{
  position:sticky;top:0;z-index:80;
  padding:14px clamp(12px,3vw,30px);
}
.masthead__inner{
  position:relative;
  max-width:var(--shell-w);margin:0 auto;
  display:flex;align-items:center;gap:12px;
  padding:8px 10px 8px 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(61,224,208,.26);
  background:linear-gradient(135deg,var(--navy) 0%,var(--sea) 60%,var(--sea-lift) 100%);
  box-shadow:var(--shadow-island);
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.masthead[data-scrolled="true"] .masthead__inner{
  border-color:rgba(61,224,208,.46);
  box-shadow:0 26px 54px -26px rgba(4,27,42,.95),0 0 0 1px rgba(61,224,208,.12);
}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;padding:4px 10px 4px 4px;border-radius:var(--r-pill);
  transition:background var(--dur-fast) var(--ease);
}
.brand:hover{background:rgba(233,226,208,.08)}
.brand__mark{
  display:grid;place-items:center;
  width:34px;height:34px;border-radius:10px;
  background:var(--coral);color:var(--ink);
  font-family:var(--font-mono);font-size:15px;font-weight:700;line-height:1;
  box-shadow:inset 0 0 0 1px rgba(16,24,32,.2);
}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{
  font-size:15px;font-weight:800;letter-spacing:.16em;color:var(--paper);
}
.brand__sub{
  font-size:10.5px;letter-spacing:.1em;
  color:rgba(233,226,208,.62);
  font-family:var(--font-mono);
}

.nav{margin-left:auto;min-width:0}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{flex:0 0 auto}
.nav__link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;border-radius:var(--r-pill);
  font-size:13.5px;font-weight:600;letter-spacing:.02em;
  color:rgba(247,244,236,.76);
  transition:background var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease);
}
.nav__link:hover{background:rgba(233,226,208,.12);color:var(--paper)}
.nav__link[data-new]::before{
  content:"";flex:0 0 auto;
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(61,224,208,.22);
}
.nav__link[aria-current="page"]{
  background:var(--sand);color:var(--ink);
}
.nav__link[aria-current="page"]::after{
  content:"";flex:0 0 auto;
  width:6px;height:6px;border-radius:50%;
  background:var(--sea);
}

.header__cta{flex:0 0 auto;margin-left:4px}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;gap:9px;
  margin-left:auto;
  padding:10px 15px;border-radius:var(--r-pill);
  border:1px solid rgba(233,226,208,.34);
  color:var(--sand);
  font-size:13px;font-weight:700;letter-spacing:.04em;
  transition:background var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease);
}
.nav-toggle:hover{background:rgba(233,226,208,.12);border-color:rgba(61,224,208,.55);color:var(--paper)}
.nav-toggle__bars{
  position:relative;display:block;
  width:16px;height:2px;border-radius:2px;background:currentColor;
  transition:background var(--dur-fast) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;
  width:16px;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}

/* 滚动进度尺 */
.scroll-meter{
  position:absolute;left:26px;right:26px;bottom:5px;height:2px;
  border-radius:2px;overflow:hidden;
  background:rgba(233,226,208,.16);
  pointer-events:none;
}
.scroll-meter__bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--coral) 100%);
  transition:transform 120ms linear;
}

/* 平板与手机导航 */
@media (max-width:979px){
  .nav-toggle{display:inline-flex}
  .nav{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    margin-left:0;
    max-height:min(72vh,480px);overflow-y:auto;
    padding:10px;
    border-radius:20px;
    border:1px solid rgba(61,224,208,.3);
    background:linear-gradient(160deg,var(--navy) 0%,var(--sea) 100%);
    box-shadow:0 28px 56px -30px rgba(4,27,42,.95);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .nav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .nav__link{
    display:flex;width:100%;
    padding:13px 16px;border-radius:14px;
    font-size:15px;
    color:rgba(247,244,236,.82);
  }
  .nav__link[aria-current="page"]{background:var(--sand);color:var(--ink)}
  .nav__link[aria-current="page"]::after{margin-left:auto}
}

@media (max-width:719px){
  .brand__sub{display:none}
  .header__cta{display:none}
  .masthead__inner{padding:7px 8px 7px 8px;gap:8px}
  .brand{padding:3px}
  .scroll-meter{left:20px;right:20px}
}

/* ============================================================
   通用按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-pill);
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1;
  border:1px solid transparent;
  transition:transform 180ms var(--ease),background 180ms var(--ease),
             color 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--coral{background:var(--coral);color:var(--ink);box-shadow:0 12px 26px -16px rgba(255,107,74,.95)}
.btn--coral:hover{background:var(--coral-hi)}
.btn--ghost{background:rgba(233,226,208,.08);color:var(--sand);border-color:rgba(233,226,208,.34)}
.btn--ghost:hover{background:rgba(233,226,208,.16);color:var(--paper);border-color:rgba(61,224,208,.6)}
.btn--quiet{background:var(--sand);color:var(--navy);border-color:rgba(11,59,92,.12)}
.btn--quiet:hover{background:#f2ecdd}
.btn--block{width:100%}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,var(--navy) 0%,var(--navy-deep) 100%);
  color:rgba(233,226,208,.84);
  border-top:1px solid rgba(61,224,208,.22);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(61,224,208,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(61,224,208,.07) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.75;
}
.footer__inner{
  position:relative;
  max-width:var(--shell-w);margin:0 auto;
  padding:clamp(44px,6vw,76px) clamp(16px,4vw,32px) 28px;
}
.footer__grid{
  display:grid;gap:clamp(26px,4vw,52px);
  grid-template-columns:1fr;
}
@media (min-width:720px){
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1080px){
  .footer__grid{grid-template-columns:1.25fr .8fr .8fr 1.35fr}
}

.brand--footer{padding:0;margin-bottom:16px}
.brand--footer:hover{background:transparent}
.footer__tagline{
  max-width:32ch;
  font-size:14.5px;line-height:1.75;
  color:rgba(233,226,208,.68);
}
.footer__chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

.footer__col-title{
  display:flex;align-items:center;gap:9px;
  margin-bottom:16px;
  font-size:11.5px;font-weight:700;letter-spacing:.24em;
  color:var(--cyan);
}
.footer__col-index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:rgba(61,224,208,.62);
}
.footer__list{display:grid;gap:2px}
.footer__link{
  display:inline-flex;padding:7px 0;
  font-size:14.5px;color:rgba(233,226,208,.78);
  border-bottom:1px solid transparent;
  transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease);
}
.footer__link:hover{color:var(--paper);border-bottom-color:var(--coral)}

.footer__contact-list{display:grid;gap:2px}
.footer__contact-item{
  display:grid;gap:5px;
  padding:11px 0;
  border-bottom:1px dashed rgba(233,226,208,.16);
}
.footer__contact-label{
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.18em;
  color:rgba(233,226,208,.5);
}
.footer__contact-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.footer__contact-value{
  font-size:14px;color:var(--paper);word-break:break-word;
}
.copy-btn{
  flex:0 0 auto;
  padding:4px 10px;border-radius:var(--r-pill);
  border:1px solid rgba(61,224,208,.42);
  color:var(--cyan);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  transition:background var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease);
}
.copy-btn:hover{background:rgba(61,224,208,.16)}
.copy-btn[data-copied="true"]{
  background:var(--teal);border-color:var(--teal);color:var(--paper);
}
.footer__note{
  margin-top:14px;max-width:44ch;
  font-size:12.5px;line-height:1.75;
  color:rgba(233,226,208,.55);
}
.footer__copy-status{
  min-height:1.2em;margin-top:8px;
  font-family:var(--font-mono);font-size:12px;
  color:var(--cyan);
}

.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 26px;
  margin-top:clamp(30px,5vw,54px);padding-top:20px;
  border-top:1px solid rgba(233,226,208,.14);
  font-size:12.5px;color:rgba(233,226,208,.55);
}
.footer__legal-note{margin:0}
.footer__legal-list{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer__legal-list a{
  border-bottom:1px solid rgba(233,226,208,.26);
  transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease);
}
.footer__legal-list a:hover{color:var(--paper);border-bottom-color:var(--coral)}
.footer__icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;margin:0}

/* ============================================================
   共享排版与组件
   ============================================================ */
.container{
  width:100%;max-width:var(--shell-w);margin-inline:auto;
  padding-inline:clamp(16px,4vw,32px);
}
.section{padding-block:clamp(48px,7vw,96px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 18px;
  margin-bottom:clamp(20px,3vw,34px);
}
.section__index{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--stone);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.24em;
  color:var(--coral);
}
.prose{max-width:70ch}
.prose p+p{margin-top:1em}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.divider{
  height:1px;border:0;margin-block:clamp(28px,4vw,48px);
  background:linear-gradient(90deg,var(--line-dark),rgba(11,59,92,.03));
}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;
  font-weight:700;color:var(--sea);
  border-bottom:1px solid rgba(11,59,92,.24);
  transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),gap var(--dur-fast) var(--ease);
}
.link-arrow::after{content:"→";font-family:var(--font-mono)}
.link-arrow:hover{color:var(--coral);border-bottom-color:var(--coral);gap:12px}

/* 标签与状态点 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  background:var(--sand);color:var(--sea);
  border:1px solid rgba(11,59,92,.16);
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.5;
}
.tag--invert{
  background:rgba(233,226,208,.12);
  border-color:rgba(233,226,208,.26);
  color:var(--sand);
}
.tag--cyan{background:rgba(61,224,208,.16);border-color:rgba(61,224,208,.48);color:#0A5A54}
.tag--amber{background:rgba(242,184,75,.2);border-color:rgba(242,184,75,.55);color:#7A5205}
.tag--ok{background:rgba(31,157,139,.16);border-color:rgba(31,157,139,.45);color:#0C5A4F}

.dot{
  display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--stone);flex:0 0 auto;
}
.dot--new{background:var(--cyan);box-shadow:0 0 0 3px rgba(61,224,208,.22)}
.dot--ok{background:var(--teal)}
.dot--warn{background:var(--amber)}

/* 纸张叠层卡片 */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border-radius:var(--r-card);
  border:1px solid var(--line-dark);
  background:var(--paper);
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.card:hover{
  transform:translate(-2px,-2px);
  border-color:rgba(11,59,92,.3);
  box-shadow:6px 6px 0 -1px var(--sand);
}
.paper{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border-radius:var(--r-card);
  border:1px solid var(--line-dark);
  background:var(--paper);
  box-shadow:var(--shadow-paper);
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.paper:hover{
  transform:translate(-2px,-2px);
  box-shadow:12px 12px 0 -1px var(--sand),12px 12px 0 0 rgba(255,107,74,.28);
}
.paper--flat{box-shadow:none}
.paper--flat:hover{box-shadow:6px 6px 0 -1px var(--sand)}
.card__title{font-size:var(--fs-h3);margin-bottom:8px}

/* 网格 */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}
.grid--asym{grid-template-columns:1fr}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .grid--asym{grid-template-columns:1.35fr 1fr}
}
@media (min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,1fr)}
}

/* 面包屑 */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  color:var(--stone);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item+.breadcrumb__item::before{
  content:"/";color:rgba(107,122,134,.55);
}
.breadcrumb a{transition:color var(--dur-fast) var(--ease)}
.breadcrumb a:hover{color:var(--coral)}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

/* 图片容器基础规则 */
.figure{margin:0}
.media{
  position:relative;
  aspect-ratio:16/10;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-dark);
  background-color:var(--sand);
  background-image:
    linear-gradient(rgba(11,59,92,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,59,92,.07) 1px,transparent 1px);
  background-size:24px 24px;
}
.media img,
.media picture,
.media picture img{
  width:100%;height:100%;object-fit:cover;
}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.04em;
  color:var(--stone);
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-meter__bar{transition:none}
  .card:hover,.paper:hover,.btn:hover{transform:none}
}