/* ============================================================
   幻影体育安装 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

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

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

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

:root{
  /* 色板 */
  --ink:#0B0E14;          /* 深空黑 */
  --ink-2:#121724;        /* 夜航黑 */
  --violet:#6C2BD9;       /* 幻影紫 */
  --violet-soft:#A98BF0;  /* 紫雾 */
  --cyan:#00E5FF;         /* 荧光青 */
  --orange:#FF6B35;       /* 警示橙 */
  --cream:#F3ECDC;        /* 奶油纸白 */
  --brown:#221B14;        /* 墨棕黑 */
  --line:#232A3B;         /* 网格灰 */
  --mist:#E9ECF4;         /* 雾白 */
  --gray:#98A2B8;         /* 铅灰 */
  --cream-line:#D9CDB5;
  --cream-muted:#6B5B45;

  /* 字体栈（不使用远程字体） */
  --font-display:"Oswald","Bebas Neue","Archivo Narrow","Arial Narrow","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-sans:"Poppins","Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* 节奏 */
  --wrap:1240px;
  --gut:clamp(16px,4vw,40px);
  --base:8px;
  --radius:2px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    linear-gradient(180deg,rgba(108,43,217,.16),rgba(11,14,20,0) 46%),
    linear-gradient(118deg,rgba(0,229,255,0) 58%,rgba(0,229,255,.055) 58.15%,rgba(0,229,255,0) 70%),
    linear-gradient(rgba(35,42,59,.55) 1px,rgba(35,42,59,0) 1px),
    linear-gradient(90deg,rgba(35,42,59,.55) 1px,rgba(35,42,59,0) 1px);
  background-size:auto,auto,100% 96px,96px 100%;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:16.5px;
  font-weight:500;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}

body.ph-nav-open{overflow:hidden}

h1,h2,h3,h4{font-family:var(--font-sans);font-weight:700;letter-spacing:-.01em;line-height:1.15}
p{text-wrap:pretty}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:1px;
}

::selection{background:var(--violet);color:#fff}

#main-content{scroll-margin-top:132px}

/* ---------------- 通用容器 ---------------- */
.ph-wrap{
  width:min(var(--wrap),calc(100% - var(--gut) * 2));
  margin-inline:auto;
}

.ph-main{
  display:block;
  padding-bottom:clamp(48px,7vw,96px);
}

/* ---------------- 跳转链接 ---------------- */
.ph-skip{
  position:fixed;
  left:10px;
  top:-70px;
  z-index:200;
  padding:11px 18px;
  background:var(--cyan);
  color:#04121A;
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  transition:top .18s var(--ease);
}
.ph-skip:focus{top:10px}

/* ============================================================
   页头
   ============================================================ */
.ph-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,14,20,.97);
  border-bottom:1px solid var(--line);
}

/* 品牌说明带（上层） */
.ph-topbar{
  background:var(--ink-2);
  border-bottom:1px solid var(--line);
  transition:height .28s var(--ease),opacity .2s var(--ease),padding .28s var(--ease);
  overflow:hidden;
}
.ph-topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:36px;
  padding-block:6px;
}
.ph-topbar__brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.ph-topbar__mark{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.24em;
  color:var(--cyan);
  border:1px solid rgba(0,229,255,.4);
  padding:3px 7px;
  line-height:1;
}
.ph-topbar__text{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--gray);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.ph-topbar__meta{
  display:flex;
  align-items:center;
  gap:18px;
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.ph-status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:var(--mist);
}
.ph-status__dot{
  width:7px;
  height:7px;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(0,229,255,.16);
  animation:ph-pulse 2.4s var(--ease) infinite;
}
@keyframes ph-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(0,229,255,.16)}
  50%{opacity:.45;box-shadow:0 0 0 6px rgba(0,229,255,0)}
}
.ph-coverage{color:var(--gray)}
.ph-topbar__link{
  color:var(--violet-soft);
  border-bottom:1px solid rgba(169,139,240,.45);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.ph-topbar__link:hover{color:var(--cyan);border-color:var(--cyan)}

/* 主导航条（下层） */
.ph-mainbar__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,32px);
  min-height:68px;
  padding-block:10px;
}

.ph-brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.ph-brand__mark{
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  background:var(--violet);
  color:#fff;
  font-family:var(--font-display);
  font-weight:700;
  font-size:21px;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:background .16s var(--ease);
}
.ph-brand:hover .ph-brand__mark{background:var(--cyan);color:#04121A}
.ph-brand__text{display:flex;flex-direction:column;line-height:1.1}
.ph-brand__name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:19px;
  letter-spacing:.02em;
  color:#fff;
}
.ph-brand__sub{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--gray);
}

.ph-nav{flex:1 1 auto;min-width:0}
.ph-nav__list{display:flex;align-items:stretch;gap:2px;flex-wrap:wrap}
.ph-nav__list a{
  position:relative;
  display:block;
  padding:10px 13px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--mist);
  transition:color .16s var(--ease),background .16s var(--ease);
}
.ph-nav__list a::after{
  content:"";
  position:absolute;
  left:13px;
  right:13px;
  bottom:2px;
  height:2px;
  background:transparent;
  transform:scaleX(.25);
  transition:transform .2s var(--ease),background .16s var(--ease);
}
.ph-nav__list a:hover{color:var(--cyan);background:rgba(108,43,217,.16)}
.ph-nav__list a:hover::after{background:var(--cyan);transform:scaleX(1)}
.ph-nav__list a[aria-current="page"]{background:var(--violet);color:#fff}
.ph-nav__list a[aria-current="page"]::after{background:var(--cyan);transform:scaleX(1)}
.ph-nav__aside{display:none}
.ph-nav__aside-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-bottom:6px;
}
.ph-nav__aside-text{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  color:var(--gray);
  margin-bottom:14px;
  word-break:break-word;
}

.ph-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}

/* 按钮 */
.ph-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:var(--radius);
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.ph-btn:active{transform:translateY(1px)}
.ph-btn--primary{
  background:var(--violet);
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(169,139,240,.45);
}
.ph-btn--primary:hover{background:#7C3CF0;border-color:var(--cyan)}
.ph-btn--ghost{
  background:transparent;
  color:var(--mist);
  border-color:var(--line);
}
.ph-btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* 移动开关 */
.ph-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--mist);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.ph-nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.ph-nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
.ph-nav-toggle__bars span{
  display:block;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .16s var(--ease);
}
.ph-nav-toggle[aria-expanded="true"] .ph-nav-toggle__bars span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.ph-nav-toggle[aria-expanded="true"] .ph-nav-toggle__bars span:nth-child(2){opacity:0}
.ph-nav-toggle[aria-expanded="true"] .ph-nav-toggle__bars span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* 滚动进度 */
.ph-scrollbar{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(35,42,59,.85);
  overflow:hidden;
}
.ph-scrollbar span{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transition:width .12s linear;
}

/* 页头收窄 */
.ph-header.is-compact .ph-topbar{
  height:0;
  padding:0;
  opacity:0;
  border-bottom-color:transparent;
}
.ph-header[data-open]::after{
  content:"";
  position:fixed;
  inset:0;
  background:rgba(4,6,10,.72);
  z-index:85;
}

/* ============================================================
   页脚
   ============================================================ */
.ph-footer{
  position:relative;
  background:var(--ink-2);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.ph-footer::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:52%;
  background:linear-gradient(90deg,rgba(108,43,217,.18),rgba(18,23,36,0));
  pointer-events:none;
}
.ph-footer .ph-wrap{
  position:relative;
  padding-block:clamp(44px,6vw,76px) 24px;
}
.ph-footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.5fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:34px;
  border-bottom:1px solid var(--line);
}
.ph-footer__brand{min-width:0}
.ph-footer__logo{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.5rem,2.4vw,2rem);
  letter-spacing:.02em;
  color:#fff;
}
.ph-footer__tag{
  margin-top:12px;
  max-width:46ch;
  font-size:15px;
  line-height:1.7;
  color:var(--mist);
}
.ph-footer__note{
  margin-top:10px;
  max-width:46ch;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.75;
  letter-spacing:.04em;
  color:var(--gray);
}
.ph-footer__cta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:20px;
}
.ph-footer__columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.4vw,32px);
}
.ph-footer__col{min-width:0}
.ph-footer__col-title{
  padding-bottom:9px;
  margin-bottom:12px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
}
.ph-footer__list li + li{margin-top:9px}
.ph-footer__list a{
  font-size:14.5px;
  color:var(--gray);
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.ph-footer__list a:hover{color:var(--cyan);padding-left:5px}

.ph-footer__contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:10px 26px;
  margin-top:24px;
  padding:18px 0 0;
  border-top:1px solid var(--line);
}
.ph-footer__contact-item{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  letter-spacing:.04em;
  color:var(--gray);
  word-break:break-word;
}
.ph-footer__contact-label{
  display:inline-block;
  min-width:62px;
  margin-right:8px;
  color:var(--violet-soft);
}
.ph-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--gray);
}
.ph-footer__legal-links{display:flex;flex-wrap:wrap;gap:18px}
.ph-footer__legal-links a{
  color:var(--gray);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.ph-footer__legal-links a:hover{color:var(--cyan);border-color:var(--cyan)}

/* 返回顶部 */
.ph-totop{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:70;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  background:rgba(18,23,36,.94);
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--cyan);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),border-color .16s var(--ease),background .16s var(--ease),visibility .24s;
}
.ph-totop[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}
.ph-totop:hover{border-color:var(--cyan);background:var(--violet);color:#fff}

/* ============================================================
   通用排版与页面组件
   ============================================================ */
.ph-kicker{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--cyan);
  margin-bottom:12px;
}
.ph-title{
  font-size:clamp(1.9rem,3.6vw,3.2rem);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.15;
}
.ph-subtitle{
  font-size:clamp(1.2rem,1.8vw,1.6rem);
  font-weight:600;
  line-height:1.3;
}
.ph-lede{
  margin-top:16px;
  max-width:62ch;
  font-size:clamp(17px,1.4vw,20px);
  font-weight:400;
  line-height:1.7;
  color:var(--mist);
}
.ph-mono{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  line-height:1.6;
  color:var(--gray);
}
.ph-link-inline{
  color:var(--violet-soft);
  border-bottom:1px solid rgba(169,139,240,.5);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.ph-link-inline:hover{color:var(--cyan);border-color:var(--cyan)}

.ph-num{
  display:block;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(3rem,8vw,7.5rem);
  line-height:.9;
  letter-spacing:-.02em;
  color:var(--cyan);
}

/* 章节 */
.ph-section{
  position:relative;
  padding-block:clamp(48px,7vw,96px);
  border-top:1px solid var(--line);
}
.ph-section--tight{padding-block:clamp(32px,4vw,56px)}
.ph-section--violet{
  background:linear-gradient(102deg,var(--violet),#3F1690);
  border-top-color:transparent;
}
.ph-section--cream{
  background:var(--cream);
  color:var(--brown);
  border-top-color:var(--cream-line);
}
.ph-section--cream .ph-kicker{color:#B44A1C}
.ph-section--cream .ph-title,
.ph-section--cream .ph-subtitle{color:var(--brown)}
.ph-section--cream .ph-lede{color:#3B2F22}
.ph-section--cream .ph-mono{color:var(--cream-muted)}
.ph-section--cream .ph-link-inline{color:#5A2AA8;border-color:rgba(90,42,168,.4)}
.ph-section--cream .ph-aside{
  background:#FFF8EA;
  color:var(--brown);
  border-color:var(--cream-line);
}
.ph-section--cream .ph-aside .ph-mono,
.ph-section--cream .ph-aside .ph-aside__title{color:var(--cream-muted)}
.ph-section--cream .ph-btn--ghost{color:var(--brown);border-color:#C9BCA2}
.ph-section--cream .ph-btn--ghost:hover{color:#5A2AA8;border-color:#5A2AA8}
.ph-section--cream .ph-panel{
  background:#FFF8EA;
  border-color:var(--cream-line);
  color:var(--brown);
}
.ph-section--cream .ph-stat__value{color:#5A2AA8}
.ph-section--cream .ph-stat__label{color:var(--cream-muted)}
.ph-section--cream .ph-media{border-color:var(--cream-line)}

.ph-section__head{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:clamp(20px,3vw,48px);
  align-items:end;
  margin-bottom:clamp(28px,4vw,52px);
}

/* 网格 */
.ph-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,24px);
}
.ph-col-3{grid-column:span 3}
.ph-col-4{grid-column:span 4}
.ph-col-5{grid-column:span 5}
.ph-col-7{grid-column:span 7}
.ph-col-8{grid-column:span 8}
.ph-col-9{grid-column:span 9}
.ph-col-12{grid-column:span 12}

/* 旁注与注释块 */
.ph-aside{
  padding:18px 18px 20px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-left:2px solid var(--violet);
  border-radius:var(--radius);
}
.ph-aside__title{
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
}
.ph-note{
  padding:16px 18px;
  background:var(--cream);
  color:var(--brown);
  border-left:2px solid var(--orange);
  border-radius:var(--radius);
  font-size:15px;
  line-height:1.7;
}

/* 数据面板 */
.ph-panel{
  position:relative;
  padding:20px 20px 22px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:border-color .16s var(--ease),transform .16s var(--ease);
}
.ph-panel::before{
  content:"";
  position:absolute;
  left:-1px;
  right:-1px;
  top:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
}
.ph-panel:hover{border-color:var(--cyan)}
.ph-panel__bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gray);
}
.ph-panel__head{margin-bottom:12px}
.ph-panel__title{
  font-size:clamp(1.05rem,1.5vw,1.35rem);
  font-weight:600;
  line-height:1.3;
}
.ph-panel__body{font-size:15px;line-height:1.75;color:var(--mist)}

/* 统计块 */
.ph-stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:16px 0;
  border-top:1px solid var(--line);
}
.ph-stat__value{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:.95;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.ph-stat__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gray);
}
.ph-stat__delta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--violet-soft);
}

/* 标记 */
.ph-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--gray);
}
.ph-tag--up{color:var(--cyan);border-color:rgba(0,229,255,.45);background:rgba(0,229,255,.08)}
.ph-tag--down{color:var(--orange);border-color:rgba(255,107,53,.45);background:rgba(255,107,53,.08)}
.ph-tag--live{color:#fff;background:var(--violet);border-color:transparent}

/* 面包屑 */
.ph-crumbs{margin-bottom:clamp(20px,3vw,34px)}
.ph-crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--gray);
}
.ph-crumbs__item{display:inline-flex;align-items:center;gap:10px}
.ph-crumbs__item + .ph-crumbs__item::before{
  content:"/";
  color:var(--line);
  color:rgba(152,162,184,.5);
}
.ph-crumbs__link{color:var(--gray);transition:color .16s var(--ease)}
.ph-crumbs__link:hover{color:var(--cyan)}
.ph-crumbs__current{color:var(--mist)}

/* 图片容器（共享基础规则，页面阶段放 <img class="ph-media__img">） */
.ph-media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(108,43,217,.34),rgba(0,229,255,.10) 56%,rgba(11,14,20,.92)),
    var(--ink-2);
}
.ph-media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(233,236,244,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(233,236,244,.05) 1px,transparent 1px);
  background-size:32px 32px;
}
.ph-media__img{
  position:relative;
  z-index:0;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.85) contrast(1.06);
}
.ph-media__tag{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  padding:6px 10px;
  background:rgba(11,14,20,.86);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.ph-media--16x9{aspect-ratio:16/9}
.ph-media--4x3{aspect-ratio:4/3}
.ph-media--1x1{aspect-ratio:1/1}
.ph-media--wide{aspect-ratio:21/9}

/* 镜像对抗布局 */
.ph-mirror{
  display:grid;
  grid-template-columns:minmax(0,1fr) 1px minmax(0,1fr);
  gap:clamp(18px,3vw,40px);
  align-items:stretch;
}
.ph-mirror__side{min-width:0}
.ph-mirror__rule{
  background:linear-gradient(180deg,transparent,var(--line) 18%,var(--line) 82%,transparent);
}

/* 斜切色带 */
.ph-band{
  height:6px;
  background:var(--violet);
  clip-path:polygon(0 0,100% 0,calc(100% - 18px) 100%,0 100%);
}
.ph-band--violet{background:linear-gradient(90deg,var(--violet),#3F1690)}
.ph-band--cyan{background:linear-gradient(90deg,var(--cyan),var(--violet))}
.ph-band--orange{background:linear-gradient(90deg,var(--orange),var(--violet))}

/* 章节目录 */
.ph-toc{
  position:sticky;
  top:132px;
  padding:18px 16px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-top:2px solid var(--violet);
  border-radius:var(--radius);
}
.ph-toc__title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
}
.ph-toc__list li + li{margin-top:2px}
.ph-toc__link{
  display:block;
  padding:7px 10px;
  font-size:14px;
  color:var(--gray);
  border-left:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.ph-toc__link:hover{color:var(--mist);background:rgba(108,43,217,.14)}
.ph-toc__link[aria-current="true"]{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(0,229,255,.07);
}

/* 进入显现 */
.ph-reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.ph-reveal.is-in{opacity:1;transform:none}
.ph-reveal--delay{transition-delay:.12s}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  .ph-actions{display:none}
  .ph-nav-toggle{display:inline-flex;margin-left:auto}

  .ph-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    left:auto;
    z-index:90;
    width:min(88vw,380px);
    display:flex;
    flex-direction:column;
    gap:6px;
    padding:26px 20px 40px;
    background:var(--ink-2);
    border-left:1px solid var(--line);
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .32s var(--ease);
  }
  .ph-nav[data-open]{
    transform:none;
    box-shadow:-24px 0 64px rgba(0,0,0,.6);
  }
  .ph-nav__list{
    flex-direction:column;
    gap:0;
    flex-wrap:nowrap;
    border-top:1px solid var(--line);
  }
  .ph-nav__list li{border-bottom:1px solid var(--line)}
  .ph-nav__list a{padding:15px 12px;font-size:17px}
  .ph-nav__list a::after{display:none}
  .ph-nav__list a:hover{background:rgba(108,43,217,.16)}
  .ph-nav__list a[aria-current="page"]{
    background:linear-gradient(90deg,var(--violet),rgba(108,43,217,.22));
    border-left:3px solid var(--cyan);
  }
  .ph-nav__aside{display:block;margin-top:24px}
}

@media (max-width:1024px){
  .ph-section__head{grid-template-columns:1fr;align-items:start}
  .ph-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .ph-col-3,.ph-col-4,.ph-col-5{grid-column:span 3}
  .ph-col-7,.ph-col-8,.ph-col-9{grid-column:span 6}
  .ph-footer__top{grid-template-columns:1fr}
  .ph-mirror{grid-template-columns:1fr}
  .ph-mirror__rule{height:1px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent)}
  .ph-toc{position:static;top:auto}
}

@media (max-width:760px){
  body{font-size:16px}
  .ph-topbar__text{font-size:11.5px}
  .ph-coverage{display:none}
  .ph-footer__columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ph-footer__contact{grid-template-columns:1fr}
  .ph-footer__legal{flex-direction:column;align-items:flex-start}
}

@media (max-width:560px){
  .ph-topbar__text{display:none}
  .ph-topbar__inner{justify-content:flex-start}
  .ph-brand__sub{display:none}
  .ph-grid{grid-template-columns:1fr}
  .ph-col-3,.ph-col-4,.ph-col-5,.ph-col-7,.ph-col-8,.ph-col-9,.ph-col-12{grid-column:span 1}
  .ph-footer__columns{grid-template-columns:1fr}
  .ph-footer__cta .ph-btn{width:100%}
  .ph-totop{right:12px;bottom:12px}
}

@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;
  }
  .ph-reveal{opacity:1;transform:none}
  .ph-nav{transition:none}
}