/* ================================================================
   凤凰竞界 · Shared Site CSS
   设计基调：数据轨道控制台 · 凤凰橙红 × 夜空蓝黑 · 锐利斜切
   ================================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
ul[class],ol[class]{list-style:none}
a{text-decoration:none;color:inherit}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
img,svg,video{display:block;max-width:100%}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.6;color:#1c2130;background:#f5f7fa;-webkit-font-smoothing:antialiased}

/* ---------- 2. Variables ---------- */
:root{
  --c-orange:#ff5400;
  --c-lava:#c61c00;
  --c-night:#0b1020;
  --c-navy:#131a30;
  --c-gold:#d4af37;
  --c-cyber:#1d9bf0;
  --c-pearl:#f5f7fa;
  --c-dark:#1c2130;
  --c-smoke:#5a6068;
  --c-success:#21c55e;
  --c-warning:#f59e0b;
  --font-body:-apple-system,BlinkMacSystemFont,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"SF Mono","Roboto Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --container:1280px;
  --header-h:72px;
  --space-xs:4px;
  --space-sm:8px;
  --space-md:16px;
  --space-lg:24px;
  --space-xl:40px;
  --space-2xl:64px;
  --shadow-sm:0 2px 8px rgba(0,0,0,.16);
  --shadow-md:0 6px 24px rgba(0,0,0,.22);
  --shadow-lg:0 12px 40px rgba(0,0,0,.34);
  --z-header:100;
  --z-drawer:98;
  --z-scrim:95;
  --z-track:90;
  --z-skip:200;
  --clip-btn:polygon(8px 0,100% 0,calc(100% - 8px) 100%,0 100%);
}

/* ---------- 3. Base Typography ---------- */
::selection{background:var(--c-orange);color:#fff}
h1,h2,h3,h4{line-height:1.3;font-weight:900;color:var(--c-dark);letter-spacing:-.01em}
p{color:var(--c-dark)}
a{color:var(--c-cyber)}
:focus-visible{outline:2px solid var(--c-gold);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- 4. Layout Containers ---------- */
.site-container{max-width:var(--container);margin:0 auto;padding:0 var(--space-lg);width:100%}
.container-narrow{max-width:760px;margin:0 auto;padding:0 var(--space-lg)}
.section-block{padding:var(--space-xl) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--space-md);margin-bottom:var(--space-lg);padding-left:12px;border-left:4px solid var(--c-orange)}
.section-title{font-size:28px;font-weight:900;line-height:1.2}
.section-more{font-size:14px;font-weight:600;color:var(--c-cyber);white-space:nowrap}
.section-more:hover{color:var(--c-orange)}
.divider-line{height:1px;border:0;background:linear-gradient(90deg,var(--c-gold) 0%,rgba(212,175,55,.25) 40%,transparent 100%);margin:var(--space-lg) 0}

/* ---------- 5. Bento Grid ---------- */
.bento-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--space-lg)}
.bento-cell{grid-column:span 12;min-width:0}
@media(min-width:768px){
  .bento-cell--half{grid-column:span 6}
  .bento-cell--third{grid-column:span 4}
  .bento-cell--full{grid-column:1/-1}
}

/* ---------- 6. Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-weight:700;font-size:14px;font-family:var(--font-body);line-height:1.2;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease}
.btn-primary{background:var(--c-orange);color:#fff;clip-path:var(--clip-btn);border:none;padding:14px 28px}
.btn-primary:hover{background:var(--c-lava);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.btn-outline{background:transparent;border:2px solid var(--c-orange);color:var(--c-orange)}
.btn-outline:hover{background:var(--c-orange);color:#fff}
@media(prefers-reduced-motion:reduce){.btn{transition:none}.btn:hover{transform:none}}

/* ---------- 7. Data & Console Panels ---------- */
.data-panel{background:var(--c-pearl);border:1px solid rgba(28,33,48,.08);padding:var(--space-lg);transition:box-shadow .25s ease,transform .25s ease;min-width:0}
.data-panel:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.data-panel__title{font-size:14px;font-weight:800;color:var(--c-dark);margin-bottom:var(--space-sm);letter-spacing:.04em}
.console-panel{background:var(--c-navy);border:1px solid rgba(255,84,0,.22);border-left:4px solid var(--c-orange);padding:var(--space-lg);color:var(--c-pearl);min-width:0}
.console-panel--light{background:var(--c-pearl);color:var(--c-dark);border-color:rgba(28,33,48,.1);border-left-color:var(--c-orange)}
.console-panel__head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);margin-bottom:var(--space-md)}
.console-panel__title{font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--c-gold)}
.console-panel--light .console-panel__title{color:var(--c-smoke)}

/* ---------- 8. Signal Line ---------- */
.signal-line{display:flex;align-items:center;gap:var(--space-sm);font-size:14px;line-height:1.4}
.signal-dot{width:8px;height:8px;border-radius:50%;background:var(--c-smoke);flex-shrink:0}
.signal-dot--live{background:var(--c-orange);box-shadow:0 0 6px rgba(255,84,0,.6)}
.signal-dot--ok{background:var(--c-success)}
.signal-dot--warn{background:var(--c-warning)}
.signal-dot--gold{background:var(--c-gold)}

/* ---------- 9. Score Display ---------- */
.score-display{font-family:var(--font-mono);font-weight:700;font-size:52px;line-height:1;color:var(--c-orange);letter-spacing:.02em}
.score-display--sm{font-size:26px}
.score-display--gold{color:var(--c-gold)}

/* ---------- 10. Flag / Tags ---------- */
.flag{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;font-size:12px;font-weight:700;letter-spacing:.06em;line-height:1.4;white-space:nowrap}
.flag--orange{background:var(--c-orange);color:#fff}
.flag--gold{background:var(--c-gold);color:var(--c-night)}
.flag--ghost{border:1px solid rgba(255,84,0,.5);color:var(--c-orange)}
.flag--success{background:rgba(33,197,94,.14);border:1px solid rgba(33,197,94,.3);color:var(--c-success)}
.flag--outline{border:1px solid rgba(28,33,48,.25);color:var(--c-smoke)}

/* ---------- 11. Breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-xs) var(--space-sm);font-size:13px;color:var(--c-smoke);padding:var(--space-sm) 0}
.breadcrumb a{color:var(--c-smoke);font-weight:500}
.breadcrumb a:hover{color:var(--c-cyber)}
.crumb-sep{color:rgba(28,33,48,.35);font-family:var(--font-mono)}
.crumb-current{color:var(--c-orange);font-weight:700}

/* ---------- 12. Accordion ---------- */
.acc-group{display:grid;gap:var(--space-sm)}
.acc-panel{background:var(--c-pearl);border:1px solid rgba(28,33,48,.08);border-left:3px solid transparent;transition:border-color .25s ease,box-shadow .25s ease}
.acc-panel[data-open="true"]{border-left-color:var(--c-orange);box-shadow:var(--shadow-sm)}
.acc-trigger{display:flex;width:100%;align-items:center;justify-content:space-between;gap:var(--space-md);padding:var(--space-md) var(--space-lg);font-size:15px;font-weight:700;color:var(--c-dark);text-align:left;cursor:pointer;font-family:var(--font-body)}
.acc-icon{font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--c-orange);transition:transform .25s ease;flex-shrink:0}
.acc-panel[data-open="true"] .acc-icon{transform:rotate(45deg)}
.acc-content{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease}
.acc-content__inner{overflow:hidden;min-height:0;padding:0 var(--space-lg)}
.acc-panel[data-open="true"] .acc-content{grid-template-rows:1fr}
.acc-panel[data-open="true"] .acc-content__inner{padding-bottom:var(--space-md)}
@media(prefers-reduced-motion:reduce){.acc-content{transition:none}}

/* ---------- 13. Filter Bar ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:var(--space-xs)}
.filter-btn{padding:8px 16px;border:1px solid rgba(92,96,104,.3);font-size:13px;font-weight:600;color:var(--c-smoke);background:transparent;cursor:pointer;transition:border-color .2s,background .2s,color .2s}
.filter-btn:hover{border-color:var(--c-orange);color:var(--c-orange)}
.filter-btn[aria-pressed="true"]{background:var(--c-orange);border-color:var(--c-orange);color:#fff}

/* ---------- 14. Image Frame ---------- */
.img-frame{position:relative;overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,rgba(255,84,0,.08),rgba(212,175,55,.08));width:100%}
.img-frame--square{aspect-ratio:1/1}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--portrait{aspect-ratio:4/5}
.img-frame img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.img-frame:hover img{transform:scale(1.04)}
.img-frame .img-ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--c-smoke);font-size:13px;background:linear-gradient(135deg,rgba(255,84,0,.06),rgba(212,175,55,.06))}
@media(prefers-reduced-motion:reduce){.img-frame img{transition:none}}

/* ---------- 15. Decorative Elements ---------- */
.blade-cut{position:relative}
.blade-cut::before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(to bottom,var(--c-orange),var(--c-lava));clip-path:polygon(0 0,100% 0,100% 8px,0 100%)}

/* ---------- 16. Skip Link ---------- */
.skip-link{position:fixed;top:-56px;left:16px;z-index:var(--z-skip);padding:12px 20px;background:var(--c-orange);color:#fff;font-weight:700;font-size:14px;border-radius:0;transition:top .2s ease}
.skip-link:focus-visible{top:16px}

/* ---------- 17. Header ---------- */
.site-header{position:sticky;top:0;z-index:var(--z-header);background:var(--c-night);border-bottom:1px solid rgba(255,84,0,.35)}
.site-header::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--c-orange) 0%,var(--c-lava) 45%,rgba(255,84,0,0) 100%)}
.header-shell{display:grid;grid-template-columns:1fr auto;align-items:center;gap:var(--space-md);max-width:var(--container);margin:0 auto;padding:0 var(--space-lg);min-height:var(--header-h);width:100%}
.brand-mark{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand-icon{width:36px;height:36px;flex-shrink:0}
.brand-word{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:18px;font-weight:900;color:var(--c-pearl);letter-spacing:.03em;white-space:nowrap}
.brand-tag{font-size:9px;font-weight:700;letter-spacing:.24em;color:var(--c-gold);text-transform:uppercase;white-space:nowrap}
.main-nav{display:none}
.header-tools{display:flex;align-items:center;gap:8px}
.tool-btn{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 16px;font-size:13px;font-weight:700;color:var(--c-pearl);border:1px solid rgba(255,84,0,.5);background:rgba(255,84,0,.12);text-decoration:none;clip-path:polygon(5px 0,100% 0,calc(100% - 5px) 100%,0 100%);transition:background .2s,color .2s,border-color .2s}
.tool-btn:hover{background:var(--c-orange);color:#fff;border-color:var(--c-orange)}
.lang-toggle{display:inline-flex;align-items:center;gap:4px;min-height:36px;padding:0 10px;border:1px solid rgba(245,247,250,.25);background:transparent;color:var(--c-pearl);font-size:12px;font-weight:700;font-family:var(--font-body);cursor:pointer;transition:border-color .2s}
.lang-toggle:hover{border-color:var(--c-gold)}
.lang-txt{color:rgba(245,247,250,.4)}
.lang-split{color:rgba(245,247,250,.3);font-size:10px}
.lang-toggle[data-zh="active"] .lang-zh{color:var(--c-gold)}
.lang-toggle[data-zh=""] .lang-en{color:var(--c-gold)}
.nav-toggle{display:none;position:relative;width:44px;height:44px;background:transparent;border:1px solid rgba(245,247,250,.25);cursor:pointer;flex-shrink:0}
.nav-toggle-line{display:block;position:absolute;left:11px;width:20px;height:2px;background:var(--c-pearl);transition:transform .3s ease,top .3s ease,opacity .2s ease}
.nav-toggle-line:nth-child(1){top:13px}
.nav-toggle-line:nth-child(2){top:21px}
.nav-toggle-line:nth-child(3){top:29px}
.nav-toggle.is-active .nav-toggle-line:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-toggle.is-active .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle.is-active .nav-toggle-line:nth-child(3){top:21px;transform:rotate(-45deg)}

/* ---------- 18. Mobile Drawer Navigation ---------- */
.nav-scrim{position:fixed;top:var(--header-h);right:0;bottom:0;left:0;background:rgba(11,16,32,.6);z-index:var(--z-scrim)}
.nav-scrim[hidden]{display:none}
body.is-nav-locked{overflow:hidden}
.main-nav[data-nav]{position:fixed;top:var(--header-h);right:0;bottom:0;width:min(320px,85vw);background:var(--c-night);border-left:2px solid rgba(255,84,0,.45);padding:var(--space-lg);transform:translateX(100%);transition:transform .3s ease;z-index:var(--z-drawer);overflow-y:auto;display:block}
.main-nav[data-nav][data-open="true"]{transform:translateX(0)}
.main-nav[data-nav] .nav-list{display:flex;flex-direction:column;gap:var(--space-xs)}
.main-nav[data-nav] .nav-link{display:block;padding:12px 16px;font-size:17px;font-weight:700;color:var(--c-pearl);border-bottom:1px solid rgba(245,247,250,.08);transition:background .2s,color .2s,border-left-color .2s}
.main-nav[data-nav] .nav-link:hover{background:rgba(255,84,0,.08);color:var(--c-orange)}
.main-nav[data-nav] .nav-link[aria-current="page"]{background:rgba(255,84,0,.14);color:var(--c-orange);border-left:3px solid var(--c-orange);padding-left:13px}
@media(prefers-reduced-motion:reduce){.main-nav[data-nav]{transition:none}}

/* ---------- 19. Mobile Bottom Bar ---------- */
.mobile-bottom{display:none}
@media(max-width:767px){
  .mobile-bottom{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:calc(var(--z-header) - 2);background:var(--c-night);border-top:1px solid rgba(255,84,0,.45);height:56px}
  .mb-item{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;color:var(--c-pearl);font-size:13px;font-weight:700;text-decoration:none;letter-spacing:.04em}
  .mb-item:hover{color:var(--c-orange)}
  .mb-item+.mb-item{border-left:1px solid rgba(245,247,250,.1)}
  .mb-icon{width:18px;height:18px}
  body{padding-bottom:56px}
}

/* ---------- 20. Scroll Track ---------- */
.scroll-track{position:fixed;top:0;right:0;bottom:0;width:5px;z-index:var(--z-track);pointer-events:none;background:rgba(255,84,0,.07);background-image:repeating-linear-gradient(to bottom,rgba(255,84,0,.16) 0,rgba(255,84,0,.16) 1px,transparent 1px,transparent 14px)}
.scroll-track-fill{display:block;width:100%;height:0;background:linear-gradient(to bottom,var(--c-orange),var(--c-gold));transition:height .08s linear}
@media(max-width:767px){.scroll-track{width:3px}}
@media(prefers-reduced-motion:reduce){.scroll-track-fill{transition:none}}

/* ---------- 21. Footer ---------- */
.site-footer{background:var(--c-night);color:var(--c-pearl);border-top:3px solid var(--c-orange);position:relative;margin-top:var(--space-2xl)}
.site-footer::before{content:"";position:absolute;top:-3px;left:0;width:30%;height:3px;background:var(--c-gold)}
.footer-shell{max-width:var(--container);margin:0 auto;padding:0 var(--space-lg)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:var(--space-xl);padding:var(--space-xl) 0 var(--space-lg)}
.footer-brand .brand-mark{margin-bottom:var(--space-md)}
.footer-brand .brand-name{font-size:22px;color:#fff}
.footer-desc{color:rgba(245,247,250,.7);font-size:14px;line-height:1.7;margin-bottom:var(--space-md);max-width:360px}
.footer-trust{color:rgba(245,247,250,.45);font-size:12px;line-height:1.7;max-width:360px;padding-left:12px;border-left:2px solid var(--c-gold)}
.footer-col{min-width:0}
.footer-head{font-size:14px;font-weight:800;letter-spacing:.12em;color:var(--c-gold);margin-bottom:var(--space-md);text-transform:uppercase;position:relative;padding-bottom:var(--space-sm)}
.footer-head::after{content:"";position:absolute;bottom:0;left:0;width:24px;height:2px;background:var(--c-orange);transform:skewX(-30deg)}
.footer-links{display:grid;gap:var(--space-sm)}
.footer-links a{color:rgba(245,247,250,.75);font-size:14px;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--c-orange);padding-left:6px}
.footer-contact-list{display:grid;gap:var(--space-sm);font-size:14px}
.contact-label{display:block;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--c-gold);text-transform:uppercase}
.contact-value{color:rgba(245,247,250,.75);word-break:break-all}
.footer-bottom{border-top:1px solid rgba(245,247,250,.1);padding:var(--space-lg) 0;display:flex;flex-wrap:wrap;gap:var(--space-sm) var(--space-md);align-items:center;justify-content:space-between}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-sm) var(--space-md);font-size:13px}
.footer-legal a{color:rgba(245,247,250,.55)}
.footer-legal a:hover{color:var(--c-gold)}
.legal-sep{color:rgba(245,247,250,.2)}
.footer-copy{color:rgba(245,247,250,.55);font-size:13px}
.footer-icp{color:rgba(245,247,250,.4);font-size:13px;letter-spacing:.04em}

/* ---------- 22. Responsive Breakpoints ---------- */
@media(min-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:row}
}
@media(min-width:1024px){
  .header-shell{grid-template-columns:1fr auto 1fr;gap:var(--space-lg)}
  .main-nav{display:flex;justify-self:center;align-items:center}
  .nav-list{display:flex;gap:2px}
  .nav-link{display:inline-flex;align-items:center;min-height:44px;padding:8px 12px;font-size:14px;font-weight:700;color:var(--c-pearl);letter-spacing:.02em;position:relative;text-decoration:none;transition:color .2s}
  .nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--c-orange);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
  .nav-link:hover{color:var(--c-gold)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link[aria-current="page"]{color:var(--c-orange)}
  .nav-link[aria-current="page"]::after{transform:scaleX(1)}
  .header-tools{justify-self:end}
  .main-nav[data-nav]{position:static;width:auto;background:transparent;border:none;padding:0;transform:none;overflow:visible}
  .main-nav[data-nav] .nav-list{flex-direction:row;gap:2px}
  .main-nav[data-nav] .nav-link{display:inline-flex;padding:8px 12px;font-size:14px;border:none;background:none}
  .main-nav[data-nav] .nav-link:hover{background:none}
  .main-nav[data-nav] .nav-link[aria-current="page"]{background:none;border-left:0;padding-left:12px}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1.6fr;gap:var(--space-xl)}
}
@media(max-width:1023px){
  .nav-toggle{display:inline-flex}
}
@media(max-width:767px){
  :root{--header-h:60px}
  .header-shell{min-height:var(--header-h);padding:0 var(--space-md)}
  .brand-name{font-size:16px}
  .brand-tag{font-size:8px;letter-spacing:.18em}
  .brand-icon{width:30px;height:30px}
  .header-tools .tool-btn{display:none}
  .lang-toggle{padding:0 8px;min-height:40px}
  .section-block{padding:var(--space-lg) 0}
  .section-title{font-size:22px}
  .bento-grid{gap:var(--space-md)}
  .score-display{font-size:40px}
  .footer-grid{gap:var(--space-xl)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 23. Reduced Motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .data-panel:hover{transform:none}
  .btn:hover{transform:none}
  .img-frame img{transition:none}
  .img-frame:hover img{transform:none}
  .footer-links a{transition:none}
  .nav-toggle-line{transition:none}
}

/* ---------- 24. Utility ---------- */
.text-sm{font-size:13px}
.text-mute{color:var(--c-smoke)}
.text-orange{color:var(--c-orange)}
.text-gold{color:var(--c-gold)}
.text-cyber{color:var(--c-cyber)}
.fw-strong{font-weight:800}
.mono{font-family:var(--font-mono)}
.mt-sm{margin-top:var(--space-sm)}
.mt-md{margin-top:var(--space-md)}
.mt-lg{margin-top:var(--space-lg)}
.mb-sm{margin-bottom:var(--space-sm)}
.mb-md{margin-bottom:var(--space-md)}
.mb-lg{margin-bottom:var(--space-lg)}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md)}
.grid-2{display:grid;grid-template-columns:1fr;gap:var(--space-lg)}
@media(min-width:768px){.grid-2{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-lg)}}