:root{
  --xf-main:#22d3ee;
  --xf-accent:#fb923c;
  --xf-bg:#0f172a;
  --xf-text:#e2e8f0;
  --xf-line:#243147;
  --xf-panel:#141f33;
  --xf-panel-2:#1a2740;
  --xf-muted:#94a3b8;
  --xf-hard-shadow:8px 8px 0 #0b1222;
  --xf-gray-shadow:8px 8px 0 rgba(34,211,238,.14);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--xf-bg);
  color:var(--xf-text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.2px;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{font-family:inherit;letter-spacing:.5px;line-height:1.35;}
a{color:var(--xf-main);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--xf-accent);}
img{max-width:100%;display:block;}
::selection{background:var(--xf-main);color:#06202b;}

/* ============ 装饰光斑 ============ */
.glow-wrap{position:relative;overflow:hidden;}
.glow{
  position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0;
  opacity:.55;
}
.glow-a{width:520px;height:520px;background:rgba(34,211,238,.35);top:-160px;right:-120px;}
.glow-b{width:420px;height:420px;background:rgba(251,146,60,.28);bottom:-140px;left:-100px;}
.glow-c{width:300px;height:300px;background:rgba(34,211,238,.22);top:40%;left:45%;}

/* ============ 导航 ============ */
.xf-nav{
  position:sticky;top:0;z-index:1000;
  background:rgba(15,23,42,.94);
  backdrop-filter:blur(12px);
  border-bottom:3px solid var(--xf-line);
}
.xf-nav-inner{
  max-width:1240px;margin:0 auto;padding:14px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.xf-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:900;font-size:1.32rem;color:var(--xf-text);
  letter-spacing:1.5px;white-space:nowrap;
}
.xf-brand i{color:var(--xf-main);font-size:1.15rem;}
.xf-brand:hover{color:var(--xf-text);}
.xf-brand:hover i{color:var(--xf-accent);}
.xf-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.xf-links a{
  color:var(--xf-text);
  font-weight:600;font-size:.93rem;
  padding:8px 13px;border:2px solid transparent;
  letter-spacing:.6px;
}
.xf-links a:hover{
  color:var(--xf-main);
  border:2px solid var(--xf-main);
  background:rgba(34,211,238,.08);
}
.xf-toggle{
  display:none;background:transparent;border:2px solid var(--xf-main);
  color:var(--xf-main);padding:6px 12px;font-size:1.1rem;line-height:1;
}

/* ============ 通用区块 ============ */
.sec{position:relative;padding:78px 0;z-index:1;}
.wrap{max-width:1240px;margin:0 auto;padding:0 20px;position:relative;z-index:2;}
.sec-tag{
  display:inline-block;font-size:.76rem;font-weight:800;letter-spacing:2.5px;
  color:var(--xf-accent);border:2px solid var(--xf-accent);
  padding:3px 12px;margin-bottom:16px;text-transform:uppercase;
}
.sec-title{
  font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:800;
  margin:0 0 14px;color:#fff;
}
.sec-title .hl{color:var(--xf-main);}
.sec-desc{color:var(--xf-muted);max-width:720px;margin:0 0 40px;font-size:1rem;line-height:1.95;}

/* ============ HERO ============ */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 88px;
  border-bottom:3px solid var(--xf-line);
  background:
    linear-gradient(160deg,rgba(34,211,238,.10) 0%,rgba(15,23,42,0) 42%),
    linear-gradient(340deg,rgba(251,146,60,.10) 0%,rgba(15,23,42,0) 46%);
}
.hero-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center;
  position:relative;z-index:2;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  border:2px solid var(--xf-line);background:var(--xf-panel);
  padding:5px 14px;font-size:.8rem;font-weight:700;letter-spacing:1.6px;
  color:var(--xf-muted);margin-bottom:24px;
}
.hero-eyebrow i{color:var(--xf-accent);}
.hero h1{
  font-size:clamp(2.1rem,5.2vw,3.5rem);
  font-weight:900;line-height:1.22;margin:0 0 22px;color:#fff;
}
.grad-text{
  background:linear-gradient(100deg,var(--xf-main) 0%,#7dd3fc 38%,var(--xf-accent) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero p.lead-txt{
  color:var(--xf-muted);font-size:1.05rem;line-height:2;max-width:560px;margin:0 0 34px;
}
.hero-btns{display:flex;flex-wrap:wrap;gap:16px;}
.btn-hard{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;font-weight:800;font-size:.95rem;letter-spacing:.8px;
  border:3px solid var(--xf-main);background:var(--xf-main);color:#06202b;
  box-shadow:var(--xf-hard-shadow);transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
  border-radius:0;
}
.btn-hard:hover{
  transform:translate(-3px,-3px);box-shadow:11px 11px 0 #0b1222;color:#06202b;
  background:#5ee7fb;
}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;font-weight:800;font-size:.95rem;letter-spacing:.8px;
  border:3px solid var(--xf-accent);background:transparent;color:var(--xf-accent);
  box-shadow:var(--xf-hard-shadow);transition:transform .18s ease,box-shadow .18s ease;
}
.btn-ghost:hover{
  transform:translate(-3px,-3px);box-shadow:11px 11px 0 #0b1222;
  background:rgba(251,146,60,.12);color:var(--xf-accent);
}

/* Hero 右侧浮块 */
.hero-float{
  position:relative;min-height:400px;display:flex;align-items:center;justify-content:center;
}
.float-card{
  position:absolute;border:3px solid var(--xf-line);background:var(--xf-panel);
  box-shadow:var(--xf-gray-shadow);overflow:hidden;
}
.float-card img{width:100%;height:100%;object-fit:cover;}
.fc-1{width:190px;height:270px;top:0;right:36px;animation:floaty 7s ease-in-out infinite;z-index:3;border-color:var(--xf-main);}
.fc-2{width:158px;height:222px;bottom:6px;left:6px;animation:floaty 8.5s ease-in-out infinite .6s;z-index:2;}
.fc-3{width:132px;height:184px;bottom:64px;right:-6px;animation:floaty 9.5s ease-in-out infinite 1.2s;z-index:4;border-color:var(--xf-accent);}
@keyframes floaty{
  0%,100%{transform:translateY(0) rotate(0deg);}
  50%{transform:translateY(-16px) rotate(-1.4deg);}
}
.hero-note{
  position:absolute;bottom:-6px;left:0;right:auto;z-index:6;
  border:2px solid var(--xf-main);background:rgba(15,23,42,.92);
  padding:6px 14px;font-size:.75rem;font-weight:700;letter-spacing:1.4px;color:var(--xf-main);
}
.hero-stats{
  display:flex;gap:34px;flex-wrap:wrap;margin-top:44px;
  border-top:2px solid var(--xf-line);padding-top:24px;
}
.hstat b{display:block;font-size:1.55rem;font-weight:900;color:var(--xf-main);line-height:1.2;}
.hstat span{font-size:.8rem;color:var(--xf-muted);letter-spacing:1.2px;font-weight:600;}

/* ============ 对比表格 ============ */
.cmp-wrap{overflow-x:auto;border:3px solid var(--xf-line);box-shadow:var(--xf-hard-shadow);background:var(--xf-panel);}
table.cmp{
  width:100%;border-collapse:collapse;min-width:720px;
}
table.cmp th,table.cmp td{
  padding:16px 18px;text-align:left;border-bottom:2px solid var(--xf-line);
  font-size:.94rem;vertical-align:top;
}
table.cmp thead th{
  background:var(--xf-panel-2);color:#fff;font-weight:800;letter-spacing:.8px;
  border-bottom:3px solid var(--xf-main);
}
table.cmp thead th:nth-child(2){border-bottom-color:var(--xf-main);color:var(--xf-main);}
table.cmp thead th:nth-child(3){border-bottom-color:var(--xf-accent);color:var(--xf-accent);}
table.cmp tbody tr:hover{background:rgba(34,211,238,.06);}
table.cmp td:first-child{font-weight:700;color:#fff;width:24%;}
table.cmp td:nth-child(2){color:var(--xf-text);}
table.cmp td:nth-child(3){color:var(--xf-muted);}
table.cmp tbody tr:last-child td{border-bottom:none;}
.badge-x{
  display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:1px;
  padding:2px 8px;border:2px solid var(--xf-main);color:var(--xf-main);margin-right:6px;
}
.badge-o{border-color:var(--xf-accent);color:var(--xf-accent);}

/* ============ 特色卡片网格 ============ */
.feat-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
}
.feat-card{
  border:3px solid var(--xf-line);background:var(--xf-panel);
  padding:30px 26px;box-shadow:var(--xf-hard-shadow);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
  position:relative;
}
.feat-card:hover{
  transform:scale(1.025);
  border-color:var(--xf-main);
  box-shadow:10px 10px 0 rgba(34,211,238,.28);
}
.feat-ico{
  width:56px;height:56px;display:flex;align-items:center;justify-content:center;
  border:3px solid var(--xf-main);color:var(--xf-main);font-size:1.4rem;
  margin-bottom:20px;background:rgba(34,211,238,.08);
}
.feat-card:nth-child(2n) .feat-ico{border-color:var(--xf-accent);color:var(--xf-accent);background:rgba(251,146,60,.08);}
.feat-card h3{font-size:1.12rem;font-weight:800;color:#fff;margin:0 0 12px;}
.feat-card p{color:var(--xf-muted);font-size:.93rem;line-height:1.9;margin:0;}
.feat-card .num{
  position:absolute;top:14px;right:18px;font-size:2.2rem;font-weight:900;
  color:rgba(226,232,240,.07);line-height:1;
}

/* ============ 介绍 / 步骤条 ============ */
.intro-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:52px;align-items:start;}
.intro-visual{
  border:3px solid var(--xf-line);box-shadow:var(--xf-hard-shadow);
  background:var(--xf-panel);overflow:hidden;
}
.intro-visual img{width:100%;height:100%;object-fit:cover;min-height:340px;}
.steps{position:relative;padding-left:8px;}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:22px;
  padding:0 0 30px;position:relative;
}
.step::before{
  content:"";position:absolute;left:31px;top:56px;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--xf-main),rgba(34,211,238,.12));
}
.step:last-child::before{display:none;}
.step-num{
  width:64px;height:64px;display:flex;align-items:center;justify-content:center;
  border:3px solid var(--xf-main);background:var(--xf-bg);color:var(--xf-main);
  font-weight:900;font-size:1.2rem;z-index:2;
}
.step:nth-child(2n) .step-num{border-color:var(--xf-accent);color:var(--xf-accent);}
.step-body h4{font-size:1.06rem;font-weight:800;color:#fff;margin:6px 0 8px;}
.step-body p{color:var(--xf-muted);font-size:.94rem;margin:0;line-height:1.9;}

/* ============ FAQ ============ */
.faq-list{max-width:900px;}
.faq-item{
  border:3px solid var(--xf-line);background:var(--xf-panel);
  margin-bottom:18px;box-shadow:6px 6px 0 #0b1222;
  transition:border-color .2s ease;
}
.faq-item:hover{border-color:var(--xf-main);}
.faq-q{
  display:flex;align-items:center;gap:14px;width:100%;
  background:transparent;border:none;text-align:left;
  padding:20px 22px;color:#fff;font-weight:800;font-size:1rem;
  cursor:pointer;line-height:1.6;
}
.faq-q .qi{
  flex:0 0 auto;width:28px;height:28px;display:flex;align-items:center;justify-content:center;
  border:2px solid var(--xf-accent);color:var(--xf-accent);font-size:.8rem;font-weight:900;
}
.faq-q .chev{margin-left:auto;color:var(--xf-main);transition:transform .25s ease;font-size:.9rem;}
.faq-item.open .chev{transform:rotate(180deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s ease;
}
.faq-a-inner{
  padding:0 22px 22px 64px;color:var(--xf-muted);font-size:.95rem;line-height:1.95;
  border-top:2px dashed var(--xf-line);padding-top:18px;margin-top:0;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  border:3px solid var(--xf-main);
  background:linear-gradient(120deg,rgba(34,211,238,.14),rgba(251,146,60,.12));
  box-shadow:var(--xf-hard-shadow);
  padding:58px 44px;text-align:center;
}
.cta-band h2{font-size:clamp(1.5rem,3.4vw,2.2rem);font-weight:900;color:#fff;margin:0 0 16px;}
.cta-band p{color:var(--xf-muted);max-width:660px;margin:0 auto 32px;line-height:1.95;}
.cta-band .hero-btns{justify-content:center;}
.cta-glow{position:absolute;width:420px;height:420px;border-radius:50%;filter:blur(100px);background:rgba(34,211,238,.30);top:-190px;left:-110px;}
.cta-glow2{position:absolute;width:340px;height:340px;border-radius:50%;filter:blur(100px);background:rgba(251,146,60,.26);bottom:-180px;right:-90px;}

/* ============ 友情链接 & 页脚 ============ */
.friend-sec{
  border-top:3px solid var(--xf-line);padding:44px 0;
  background:var(--xf-panel);
}
.friend-title{
  font-size:.82rem;font-weight:900;letter-spacing:2.6px;color:var(--xf-accent);
  margin:0 0 16px;text-transform:uppercase;
}
.friend-line{color:var(--xf-muted);font-size:.92rem;line-height:2;word-break:break-all;}
.friend-line a{color:var(--xf-text);}
.friend-line a:hover{color:var(--xf-main);}
footer.xf-footer{
  background:#0b1222;border-top:3px solid var(--xf-line);
  padding:54px 0 26px;
}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;margin-bottom:38px;
}
.foot-brand{font-size:1.2rem;font-weight:900;color:#fff;letter-spacing:1.5px;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.foot-brand i{color:var(--xf-main);}
.foot-brand + p{color:var(--xf-muted);font-size:.9rem;line-height:1.95;margin:0;max-width:340px;}
.foot-h{font-size:.8rem;font-weight:900;letter-spacing:2px;color:var(--xf-main);margin:0 0 16px;text-transform:uppercase;}
.foot-list{list-style:none;padding:0;margin:0;}
.foot-list li{margin-bottom:10px;}
.foot-list a{color:var(--xf-muted);font-size:.9rem;}
.foot-list a:hover{color:var(--xf-main);}
.foot-bottom{
  border-top:2px solid var(--xf-line);padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  color:#64748b;font-size:.83rem;
}

/* ============ 滚动渐显 ============ */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:translateY(0);}
.reveal.d1{transition-delay:.08s;}
.reveal.d2{transition-delay:.16s;}
.reveal.d3{transition-delay:.24s;}
.reveal.d4{transition-delay:.32s;}
.reveal.d5{transition-delay:.40s;}
.reveal.d6{transition-delay:.48s;}

/* ============ 响应式 ============ */
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:52px;}
  .hero-float{min-height:340px;max-width:420px;margin:0 auto;width:100%;}
  .feat-grid{grid-template-columns:repeat(2,1fr);}
  .intro-grid{grid-template-columns:1fr;gap:36px;}
  .intro-visual img{min-height:240px;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .xf-toggle{display:inline-block;}
  .xf-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:#0b1222;border-bottom:3px solid var(--xf-line);
    padding:12px 18px;flex-direction:column;align-items:stretch;gap:2px;
  }
  .xf-links.show{display:flex;}
  .xf-links a{border:2px solid transparent;padding:11px 10px;border-bottom:1px solid var(--xf-line);}
  .sec{padding:58px 0;}
  .hero{padding:66px 0 60px;}
  .feat-grid{grid-template-columns:1fr;}
  .cta-band{padding:40px 22px;}
  .faq-a-inner{padding-left:22px;}
  .step{grid-template-columns:50px 1fr;gap:16px;}
  .step-num{width:50px;height:50px;font-size:1rem;}
  .step::before{left:24px;top:46px;}
  .hero-stats{gap:24px;}
}
@media (max-width:520px){
  .foot-grid{grid-template-columns:1fr;}
  .hero-btns{flex-direction:column;align-items:stretch;}
  .hero-btns a{justify-content:center;}
  .fc-1{width:150px;height:214px;right:16px;}
  .fc-2{width:126px;height:178px;}
  .fc-3{width:106px;height:148px;}
  .hero-float{min-height:300px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}

/* --- 子页面追加 --- */
/* ---- 榜单页专属 ---- */
  .rank-hero {
    padding:64px 0 40px;
    border-bottom:1px solid var(--xf-line);
    background:
      radial-gradient(900px 380px at 12% -10%,rgba(34,211,238,.16),transparent 60%),
      radial-gradient(700px 320px at 88% 0%,rgba(251,146,60,.12),transparent 62%);
  }
.rank-hero h1 {
    font-size:clamp(1.9rem,4.4vw,3.1rem);
    font-weight:900;
    letter-spacing:-.02em;
    line-height:1.18;
    margin:14px 0 16px;
  }
.rank-hero p.lead-txt {
    color:var(--xf-muted);
    max-width:760px;
    line-height:1.85;
    margin:0;
    font-size:1.02rem;
  }
.rank-meta {
    display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;
  }
.rank-meta span {
    font-size:.8rem;color:var(--xf-main);
    border:1px solid var(--xf-line);
    background:var(--xf-panel);
    padding:6px 12px;border-radius:999px;
    letter-spacing:.02em;
  }
.rank-meta span i {margin-right:6px;}
.rank-tabs {
    display:flex;flex-wrap:wrap;gap:10px;margin:34px 0 26px;
  }
.rank-tabs a {
    font-size:.86rem;font-weight:600;
    color:var(--xf-muted);
    border:1px solid var(--xf-line);
    background:var(--xf-panel);
    padding:9px 16px;border-radius:10px;
    transition:.2s;
  }
.rank-tabs a:hover,
  .rank-tabs a.active {
    color:#08131f;
    background:var(--xf-main);
    border-color:var(--xf-main);
    box-shadow:4px 4px 0 rgba(34,211,238,.2);
  }
.rank-board {
    background:var(--xf-panel);
    border:1px solid var(--xf-line);
    border-radius:16px;
    padding:26px 22px;
    box-shadow:var(--xf-gray-shadow);
    height:100%;
  }
.rank-board h2 {
    font-size:1.16rem;font-weight:800;margin:0 0 6px;
    letter-spacing:-.01em;
  }
.rank-board .board-sub {
    color:var(--xf-muted);font-size:.82rem;margin-bottom:18px;display:block;
  }
.rank-item {
    display:flex;gap:14px;align-items:flex-start;
    padding:14px 0;
    border-top:1px dashed var(--xf-line);
  }
.rank-item:first-of-type {border-top:0;padding-top:0;}
.rank-no {
    flex:0 0 38px;height:38px;
    display:flex;align-items:center;justify-content:center;
    font-weight:900;font-size:.95rem;
    border-radius:9px;
    background:var(--xf-panel-2);
    color:var(--xf-muted);
    border:1px solid var(--xf-line);
  }
.rank-item:nth-of-type(1) .rank-no {background:rgba(251,146,60,.16);color:var(--xf-accent);border-color:rgba(251,146,60,.45);}
.rank-item:nth-of-type(2) .rank-no {background:rgba(34,211,238,.14);color:var(--xf-main);border-color:rgba(34,211,238,.4);}
.rank-item:nth-of-type(3) .rank-no {background:rgba(226,232,240,.1);color:#cbd5e1;border-color:rgba(226,232,240,.28);}
.rank-info {flex:1;min-width:0;}
.rank-info h3 {
    font-size:.97rem;font-weight:700;margin:0 0 5px;
    color:var(--xf-text);
  }
.rank-info p {
    margin:0 0 8px;font-size:.83rem;line-height:1.7;color:var(--xf-muted);
  }
.rank-tags {display:flex;flex-wrap:wrap;gap:6px;}
.rank-tags i-tag,.rank-tags span {
    font-size:.7rem;
    padding:2px 8px;border-radius:6px;
    background:rgba(34,211,238,.1);
    color:var(--xf-main);
    border:1px solid rgba(34,211,238,.24);
  }
.rank-tags span.hot {
    background:rgba(251,146,60,.12);
    color:var(--xf-accent);
    border-color:rgba(251,146,60,.3);
  }
.rank-bar {
    height:5px;border-radius:99px;background:var(--xf-panel-2);
    margin-top:9px;overflow:hidden;
  }
.rank-bar em {
    display:block;height:100%;border-radius:99px;
    background:linear-gradient(90deg,var(--xf-main),var(--xf-accent));
  }
.rule-list {
    list-style:none;padding:0;margin:0;
  }
.rule-list li {
    display:flex;gap:12px;
    padding:13px 0;border-top:1px dashed var(--xf-line);
    font-size:.9rem;line-height:1.75;color:var(--xf-muted);
  }
.rule-list li:first-child {border-top:0;padding-top:0;}
.rule-list li i {
    color:var(--xf-main);flex:0 0 18px;margin-top:4px;font-size:.85rem;
  }
.rule-list li b {color:var(--xf-text);font-weight:700;}
.faq-box {
    background:var(--xf-panel);
    border:1px solid var(--xf-line);
    border-radius:14px;
    overflow:hidden;
  }
.faq-box details {
    border-top:1px solid var(--xf-line);
  }
.faq-box details:first-child {border-top:0;}
.faq-box summary {
    cursor:pointer;list-style:none;
    padding:16px 20px;
    font-weight:600;font-size:.95rem;
    color:var(--xf-text);
    position:relative;
    transition:background .2s;
  }
.faq-box summary::-webkit-details-marker {display:none;}
.faq-box summary::after {
    content:'\f078';
    font-family:'Font Awesome 6 Free';font-weight:900;
    position:absolute;right:20px;top:50%;transform:translateY(-50%);
    font-size:.72rem;color:var(--xf-muted);transition:transform .2s;
  }
.faq-box details[open] summary::after {transform:translateY(-50%) rotate(180deg);}
.faq-box summary:hover {background:var(--xf-panel-2);}
.faq-box .faq-body {
    padding:0 20px 18px;
    font-size:.88rem;line-height:1.85;color:var(--xf-muted);
  }
.cta-box {
    background:var(--xf-panel-2);
    border:1px solid var(--xf-line);
    border-radius:16px;
    padding:32px 26px;
    text-align:center;
    box-shadow:var(--xf-hard-shadow);
  }
.cta-box h2 {
    font-size:1.32rem;font-weight:900;margin:0 0 12px;
  }
.cta-box p {
    color:var(--xf-muted);font-size:.9rem;line-height:1.8;
    margin:0 auto 22px;max-width:620px;
  }
.rank-hero {padding:44px 0 30px;}
.rank-board {padding:20px 16px;}
.rank-no {flex:0 0 32px;height:32px;font-size:.85rem;}

/* --- 子页面追加 --- */
.about-hero {
    padding:88px 0 56px;
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--xf-line);
  }
.about-hero::before {
    content:"";
    position:absolute;
    width:420px;height:420px;
    right:-120px;top:-140px;
    background:radial-gradient(circle,rgba(34,211,238,.22),transparent 65%);
    pointer-events:none;
  }
.about-hero::after {
    content:"";
    position:absolute;
    width:360px;height:360px;
    left:-140px;bottom:-180px;
    background:radial-gradient(circle,rgba(251,146,60,.16),transparent 65%);
    pointer-events:none;
  }
.about-h1 {
    font-size:clamp(1.9rem,4.2vw,3.1rem);
    font-weight:900;
    line-height:1.22;
    letter-spacing:-.02em;
    margin:18px 0 18px;
  }
.about-lead {
    color:var(--xf-muted);
    font-size:1.02rem;
    line-height:1.9;
    max-width:640px;
  }
.about-meta {
    display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;
  }
.about-chip {
    display:inline-flex;align-items:center;gap:8px;
    background:var(--xf-panel);
    border:1px solid var(--xf-line);
    color:var(--xf-text);
    padding:8px 14px;
    border-radius:999px;
    font-size:.83rem;
    font-weight:500;
  }
.about-chip i {color:var(--xf-main);font-size:.8rem;}
.x-panel {
    background:var(--xf-panel);
    border:1px solid var(--xf-line);
    border-radius:16px;
    padding:26px 24px;
    height:100%;
    transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  }
.x-panel:hover {
    transform:translateY(-4px);
    border-color:rgba(34,211,238,.5);
    box-shadow:var(--xf-gray-shadow);
  }
.x-panel .xp-ico {
    width:46px;height:46px;
    display:flex;align-items:center;justify-content:center;
    border-radius:12px;
    background:rgba(34,211,238,.12);
    color:var(--xf-main);
    font-size:1.15rem;
    margin-bottom:16px;
  }
.x-panel h3 {
    font-size:1.05rem;
    font-weight:700;
    margin-bottom:10px;
    color:var(--xf-text);
  }
.x-panel p {
    color:var(--xf-muted);
    font-size:.92rem;
    line-height:1.85;
    margin:0;
  }
.x-panel.alt .xp-ico {background:rgba(251,146,60,.13);color:var(--xf-accent);}
.x-body p {
    color:var(--xf-muted);
    line-height:1.95;
    font-size:.95rem;
    margin-bottom:16px;
  }
.x-body p:last-child {margin-bottom:0;}
.x-body strong {color:var(--xf-text);font-weight:600;}
.x-list {list-style:none;padding:0;margin:0;}
.x-list li {
    display:flex;gap:12px;
    padding:13px 0;
    border-bottom:1px dashed var(--xf-line);
    color:var(--xf-muted);
    font-size:.93rem;
    line-height:1.8;
  }
.x-list li:last-child {border-bottom:none;}
.x-list li i {color:var(--xf-main);margin-top:5px;font-size:.85rem;flex:0 0 auto;}
.x-list li b {color:var(--xf-text);font-weight:600;}
.timeline {
    position:relative;
    padding-left:26px;
    margin:0;
    list-style:none;
  }
.timeline::before {
    content:"";
    position:absolute;left:7px;top:6px;bottom:6px;
    width:2px;
    background:linear-gradient(180deg,var(--xf-main),rgba(34,211,238,.05));
  }
.timeline li {
    position:relative;
    padding-bottom:26px;
  }
.timeline li:last-child {padding-bottom:0;}
.timeline li::before {
    content:"";
    position:absolute;left:-26px;top:6px;
    width:16px;height:16px;
    border-radius:50%;
    background:var(--xf-bg);
    border:3px solid var(--xf-main);
  }
.timeline h4 {
    font-size:.98rem;font-weight:700;color:var(--xf-text);
    margin:0 0 6px;
  }
.timeline span.tl-tag {
    display:inline-block;
    font-size:.72rem;
    font-weight:600;
    color:var(--xf-accent);
    letter-spacing:.06em;
    margin-bottom:4px;
  }
.timeline p {
    margin:0;color:var(--xf-muted);font-size:.9rem;line-height:1.8;
  }
.stat-row {
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:16px;
  }
.stat-box {
    background:var(--xf-panel-2);
    border:1px solid var(--xf-line);
    border-radius:14px;
    padding:20px 16px;
    text-align:center;
  }
.stat-box .num {
    font-size:1.6rem;font-weight:900;
    color:var(--xf-main);
    letter-spacing:-.02em;
    line-height:1.2;
  }
.stat-box .lbl {
    font-size:.8rem;color:var(--xf-muted);margin-top:6px;
  }
.xf-footer .f-brand {
    display:inline-flex;align-items:center;gap:9px;
    font-weight:800;font-size:1.05rem;color:var(--xf-text);
    text-decoration:none;
  }
.xf-footer .f-brand i {color:var(--xf-main);}
.xf-footer p.f-desc {
    color:var(--xf-muted);font-size:.88rem;line-height:1.8;margin:14px 0 0;max-width:420px;
  }
.f-links {display:flex;flex-wrap:wrap;gap:8px 22px;margin:0;padding:0;list-style:none;}
.f-links a {color:var(--xf-muted);text-decoration:none;font-size:.88rem;transition:color .2s;}
.f-links a:hover {color:var(--xf-main);}
.f-title {color:var(--xf-text);font-weight:700;font-size:.92rem;margin-bottom:14px;}
.f-bottom {
    margin-top:34px;padding-top:20px;
    border-top:1px solid var(--xf-line);
    color:var(--xf-muted);font-size:.82rem;
    display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;
  }
.about-hero {padding:60px 0 40px;}
.stat-row {grid-template-columns:repeat(2,1fr);}

/* --- 子页面追加 --- */
.legal-wrap {max-width:960px;margin:0 auto}
.legal-block {background:var(--xf-panel);border:1px solid var(--xf-line);border-radius:16px;padding:28px 26px;margin-bottom:22px;box-shadow:var(--xf-gray-shadow);transition:.25s}
.legal-block:hover {border-color:rgba(34,211,238,.45);transform:translateY(-2px)}
.legal-block h2 {font-size:1.28rem;font-weight:800;color:var(--xf-text);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.legal-block h2 i {color:var(--xf-main);font-size:1.05rem}
.legal-block h3 {font-size:1.02rem;font-weight:700;color:var(--xf-accent);margin:18px 0 8px}
.legal-block p {color:var(--xf-muted);line-height:1.85;margin-bottom:12px;font-size:.96rem}
.legal-block p:last-child {margin-bottom:0}
.legal-block ul {list-style:none;padding-left:0;margin:0}
.legal-block li {position:relative;padding-left:22px;color:var(--xf-muted);line-height:1.8;margin-bottom:10px;font-size:.96rem}
.legal-block li::before {content:"\f0da";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;left:0;top:1px;color:var(--xf-main);font-size:.8rem}
.legal-block strong {color:var(--xf-text);font-weight:600}
.legal-meta {display:flex;flex-wrap:wrap;gap:10px 26px;color:var(--xf-muted);font-size:.86rem;padding:16px 4px 4px;border-top:1px dashed var(--xf-line);margin-top:6px}
.legal-meta span i {color:var(--xf-main);margin-right:6px}
.legal-note {background:linear-gradient(120deg,rgba(251,146,60,.10),rgba(34,211,238,.08));border:1px solid rgba(251,146,60,.35);border-radius:14px;padding:20px 22px;margin-bottom:26px}
.legal-note p {margin:0;color:var(--xf-text);line-height:1.85;font-size:.95rem}
.legal-note i {color:var(--xf-accent);margin-right:8px}
.back-top {text-align:center;margin:34px 0 10px}
.legal-block {padding:20px 18px}
.legal-block h2 {font-size:1.12rem}