/* ============================================================
   海豚体育 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote,address{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}

/* ---------- 2. 变量 ---------- */
:root{
  --sea-900:#07131F;
  --sea-800:#0B1F33;
  --sea-700:#102E47;
  --sea-600:#2A4A63;
  --paper:#F3EEE3;
  --silver:#C7D2DA;
  --fog:#E6EBEF;
  --orange:#FF6B2C;
  --green:#35E08C;
  --amber:#F2B84B;
  --mute:#8AA0B2;
  --line:rgba(199,210,218,.16);
  --line-strong:rgba(199,210,218,.32);
  --radius:12px;
  --radius-sm:8px;
  --wrap:1240px;
  --gutter:clamp(16px,4vw,44px);
  --header-h:104px;
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--sea-800);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.62;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.site-main{display:block;min-height:60vh}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.display,.h1,.h2,.h3{font-family:var(--font-display);font-weight:700;line-height:1.02;letter-spacing:.01em}
.display{font-size:clamp(2.8rem,7vw,7rem);line-height:.94}
.h1{font-size:clamp(2.1rem,4.4vw,3.9rem);line-height:1}
.h2{font-size:clamp(1.6rem,3vw,3rem);line-height:1.06}
.h3{font-size:clamp(1.15rem,1.8vw,1.6rem);line-height:1.18;font-weight:600}
.lead{font-size:clamp(1rem,1.4vw,1.12rem);color:var(--silver);max-width:64ch;line-height:1.68}
.muted{color:var(--mute)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.index-label{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--mute)}
.index-label::before{content:"";width:18px;height:1px;background:var(--orange);flex:none}
.rule{height:1px;width:100%;border:0;background:var(--line);margin:0}

/* ---------- 4. 章节与面板 ---------- */
.section{position:relative;padding-block:clamp(44px,7vw,96px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}
.section--paper{background:var(--paper);color:var(--sea-900)}
.section--paper .lead,.section--paper .muted{color:#456073}
.section--paper .index-label{color:#5B7385}
.section--paper .rule{background:rgba(11,31,51,.14)}
.section--paper .stat__value{color:var(--sea-900)}
.section--paper .stat__label{color:#5B7385}
.section--paper .card{background:#FFFFFF;border-color:rgba(11,31,51,.12)}
.section--paper .card__title{color:var(--sea-900)}
.section--paper .card__meta{color:#5B7385}
.section--ink{background:var(--sea-700)}

.panel{position:relative;border-radius:var(--radius);padding:clamp(18px,3vw,32px)}
.panel--paper{background:var(--paper);color:var(--sea-900);box-shadow:0 18px 44px rgba(4,10,18,.38)}
.panel--glass{background:linear-gradient(180deg,rgba(42,74,99,.62),rgba(16,46,71,.52));border:1px solid var(--line);-webkit-backdrop-filter:blur(12px) saturate(120%);backdrop-filter:blur(12px) saturate(120%)}
.panel--ink{background:var(--sea-700);border:1px solid rgba(199,210,218,.12)}
.panel--flush{padding:0}

.card{position:relative;display:grid;gap:8px;align-content:start;padding:clamp(16px,2vw,22px);border-radius:var(--radius-sm);background:rgba(16,46,71,.74);border:1px solid rgba(199,210,218,.14);transition:border-color .18s ease,transform .18s ease,background .18s ease}
.card:hover,.card:focus-within{border-color:rgba(255,107,44,.5);transform:translateY(-2px)}
.card__title{font-family:var(--font-display);font-weight:600;font-size:1.14rem;line-height:1.2;letter-spacing:.02em}
.card__meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--mute)}

/* ---------- 5. 栅格与堆叠 ---------- */
.stack{display:grid;gap:clamp(16px,2.4vw,28px)}
.stack--lg{gap:clamp(28px,4vw,56px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--rail{grid-template-columns:minmax(0,210px) minmax(0,1fr)}
.grid--split{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}

/* ---------- 6. 按钮 / 标签 / 状态 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:11px 20px;border-radius:10px;border:1px solid transparent;font-weight:700;font-size:.88rem;line-height:1;letter-spacing:.06em;white-space:nowrap;transition:transform .16s ease,background .18s ease,color .18s ease,border-color .18s ease}
.btn--primary{background:var(--orange);color:#1A0A02;box-shadow:0 8px 20px rgba(255,107,44,.26)}
.btn--primary:hover,.btn--primary:focus-visible{background:#FF8148;transform:translateY(-1px)}
.btn--ghost{background:rgba(42,74,99,.38);border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--green);color:var(--green)}
.btn--sm{padding:8px 14px;font-size:.78rem;border-radius:8px}
.btn--block{width:100%}

.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--silver);flex:none}
.status-dot--green{background:var(--green);box-shadow:0 0 0 3px rgba(53,224,140,.18)}
.status-dot--amber{background:var(--amber);box-shadow:0 0 0 3px rgba(242,184,75,.18)}
.status-dot--orange{background:var(--orange);box-shadow:0 0 0 3px rgba(255,107,44,.18)}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border-radius:999px;border:1px solid var(--line-strong);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--silver);white-space:nowrap}
.tag--orange{border-color:rgba(255,107,44,.5);background:rgba(255,107,44,.12);color:#FFC7AC}
.tag--green{border-color:rgba(53,224,140,.5);background:rgba(53,224,140,.12);color:#9BFFCB}
.tag--amber{border-color:rgba(242,184,75,.5);background:rgba(242,184,75,.12);color:#FFE0A3}

.stat{display:grid;gap:4px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(1.7rem,3.4vw,3rem);font-weight:700;line-height:1;color:var(--paper)}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--mute)}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--mute)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__list li{display:flex;align-items:center;gap:8px}
.breadcrumb__list li + li::before{content:"/";color:var(--sea-600)}
.breadcrumb a{color:var(--silver)}
.breadcrumb a:hover,.breadcrumb a:focus-visible{color:var(--green)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- 8. 图片容器基础规则 ---------- */
.media-frame{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);background:linear-gradient(135deg,var(--sea-700),var(--sea-900));aspect-ratio:16 / 10}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{content:"";position:absolute;inset:auto 0 0 0;height:42%;background:linear-gradient(180deg,rgba(7,19,31,0),rgba(7,19,31,.72));pointer-events:none}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__tag{position:absolute;left:12px;bottom:12px;z-index:1;display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:rgba(7,19,31,.72);border:1px solid var(--line-strong);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--paper)}

/* ---------- 9. 粘性筛选条 ---------- */
.filter-bar{position:sticky;top:calc(var(--header-h) + 10px);z-index:40;display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px;border-radius:12px;background:rgba(16,46,71,.86);border:1px solid var(--line);-webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%)}
.filter-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;border:1px solid var(--line-strong);font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--silver);transition:background .16s ease,color .16s ease,border-color .16s ease}
.filter-btn:hover,.filter-btn:focus-visible{color:var(--paper);border-color:rgba(255,107,44,.55)}
.filter-btn[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:#04170C;font-weight:700}
[data-filter-item][hidden]{display:none !important}

/* ---------- 10. 显现与滚动进度 ---------- */
.reveal-ready .reveal{opacity:0;transform:translateY(18px);transition:opacity .52s ease,transform .52s cubic-bezier(.22,.68,.32,1)}
.reveal-ready .reveal.is-visible{opacity:1;transform:none}
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:200;pointer-events:none;background:linear-gradient(90deg,var(--orange),var(--green));transition:width .1s linear}

/* ---------- 11. 头部 ---------- */
.skip-link{position:fixed;left:14px;top:-72px;z-index:300;padding:10px 18px;border-radius:0 0 10px 10px;background:var(--green);color:var(--sea-900);font-weight:700;font-size:.86rem;letter-spacing:.06em;transition:top .18s ease}
.skip-link:focus{top:0}

.site-header{position:sticky;top:0;z-index:100;background:rgba(11,31,51,.94);border-bottom:1px solid var(--line);color:var(--paper);-webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%)}
.site-header__track{position:absolute;left:0;right:0;bottom:0;height:2px;pointer-events:none;background:repeating-linear-gradient(90deg,var(--orange) 0 26px,transparent 26px 52px);opacity:.5}
.site-header__inner{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;column-gap:clamp(18px,3vw,52px);padding-block:13px 15px}

.header-brand{display:flex;align-items:center;gap:clamp(10px,2vw,18px);min-width:0}
.brand-link{display:inline-flex;align-items:center;gap:12px;padding:4px 2px;border-radius:6px}
.brand-dot{width:10px;height:10px;flex:none;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(53,224,140,.16),0 0 14px rgba(53,224,140,.65)}
.brand-text{display:flex;flex-direction:column;line-height:1.04}
.brand-name{font-family:var(--font-display);font-weight:700;font-size:clamp(1.3rem,2.2vw,1.68rem);letter-spacing:.08em;color:var(--paper)}
.brand-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;text-transform:uppercase;color:var(--silver);opacity:.7}
.round-chip{display:inline-flex;align-items:center;gap:8px;padding:5px 11px;border-radius:999px;border:1px solid rgba(255,107,44,.45);background:rgba(255,107,44,.1);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;white-space:nowrap}
.round-chip__label{color:var(--silver);letter-spacing:.16em}
.round-chip__num{color:var(--orange);font-weight:700}

.header-panel{display:grid;row-gap:7px;justify-items:end;min-width:0}
.site-nav{min-width:0}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:clamp(6px,1.6vw,22px)}
.site-nav__link{position:relative;display:inline-block;padding:6px 2px;font-size:.94rem;font-weight:500;letter-spacing:.06em;color:var(--silver);transition:color .18s ease}
.site-nav__link::after{content:"";position:absolute;left:0;right:100%;bottom:1px;height:2px;background:var(--orange);transition:right .22s ease}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--paper)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{right:0}
.site-nav__link[aria-current="page"]{color:var(--paper);font-weight:700}
.site-nav__link[aria-current="page"]::after{right:0;background:var(--green)}

.header-status{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px clamp(10px,2vw,22px)}
.header-status__line{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--silver)}
.header-status__link{color:var(--green);border-bottom:1px solid rgba(53,224,140,.42);padding-bottom:1px}
.header-status__link:hover,.header-status__link:focus-visible{color:#9BFFCB}
.header-utility{display:inline-flex;align-items:center;gap:14px}
.utility-link{display:inline-flex;align-items:center;gap:7px;padding:3px 0;font-size:.82rem;letter-spacing:.08em;color:var(--silver);border-bottom:1px dashed rgba(199,210,218,.32)}
.utility-link::before{content:"";display:inline-block;width:11px;height:11px;border:1.5px solid currentColor;border-radius:50%;flex:none}
.utility-link:hover,.utility-link:focus-visible{color:var(--green);border-bottom-color:rgba(53,224,140,.6)}

.nav-toggle{display:none;align-items:center;gap:9px;padding:9px 12px;border-radius:9px;border:1px solid var(--line-strong);background:rgba(42,74,99,.45);color:var(--paper);font-family:var(--font-mono);font-size:11px;letter-spacing:.18em}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--green);color:var(--green)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;flex:none}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- 12. 页脚 ---------- */
.site-footer{position:relative;background:var(--sea-900);color:var(--silver);border-top:1px solid var(--line);padding-top:clamp(38px,6vw,68px)}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:repeating-linear-gradient(90deg,var(--orange) 0 24px,transparent 24px 48px);opacity:.4;pointer-events:none}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.25fr;gap:clamp(22px,3vw,48px);padding-bottom:clamp(26px,4vw,44px)}
.footer-brand{min-width:0}
.footer-brand__name{font-family:var(--font-display);font-weight:700;font-size:clamp(1.7rem,3vw,2.35rem);line-height:1.08;letter-spacing:.06em;color:var(--paper)}
.footer-brand__line{margin-top:10px;font-size:.92rem;color:var(--silver);max-width:34ch}
.footer-brand__status{display:flex;align-items:center;gap:8px;margin-top:16px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--green)}
.footer-col{min-width:0}
.footer-col__title{font-family:var(--font-mono);font-size:11px;font-weight:400;letter-spacing:.24em;text-transform:uppercase;color:var(--mute);margin-bottom:14px}
.footer-list{display:grid;gap:9px;font-size:.92rem}
.footer-list a{color:var(--silver);transition:color .16s ease,padding-left .16s ease}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--paper);padding-left:4px}
.footer-col--contact{justify-self:stretch}
.footer-contact{display:grid;gap:10px;font-style:normal;font-family:var(--font-mono);font-size:12.5px;line-height:1.62;color:var(--silver)}
.footer-contact__item{display:grid;gap:2px}
.footer-contact__label{font-size:10px;letter-spacing:.22em;color:var(--mute)}
.footer-contact__value{color:var(--paper);word-break:break-word}
.footer-meta{padding-block:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.footer-service{font-size:.86rem;color:var(--mute);max-width:72ch}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;padding-block:18px 26px}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--mute)}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:16px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--mute)}
.footer-legal__links a:hover,.footer-legal__links a:focus-visible{color:var(--paper)}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr;gap:clamp(22px,4vw,36px)}
  .footer-brand{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:920px){
  .site-header__inner{grid-template-columns:minmax(0,1fr) auto;align-items:center;row-gap:0;padding-block:11px 13px}
  .header-brand{grid-column:1;grid-row:1;flex-wrap:wrap;gap:10px}
  .nav-toggle{grid-column:2;grid-row:1;display:inline-flex}
  .header-panel{grid-column:1 / -1;grid-row:2;display:none;justify-items:stretch;width:100%;padding-top:14px;margin-top:12px;border-top:1px solid var(--line);row-gap:10px}
  .header-panel[data-open]{display:grid}
  .site-nav__list{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:2px}
  .site-nav__link{display:block;padding:11px 12px;border-radius:8px;font-size:1rem;border-bottom:1px solid rgba(199,210,218,.1)}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{background:rgba(53,224,140,.12);box-shadow:inset 3px 0 0 var(--green);color:var(--paper)}
  .header-status{justify-content:flex-start;padding-top:12px;border-top:1px dashed rgba(199,210,218,.18)}
  .header-utility{width:100%;justify-content:space-between;gap:10px}
  .filter-bar{top:calc(var(--header-h) + 8px)}
}

@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--rail,.grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  body{font-size:15.5px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .header-status__line{font-size:11px}
  .brand-name{font-size:1.22rem}
  .round-chip{font-size:10px;padding:4px 9px}
}

/* ---------- 14. 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal-ready .reveal{opacity:1;transform:none}
  .scroll-progress{display:none}
  .card:hover,.card:focus-within{transform:none}
  .btn--primary:hover{transform:none}
}