@charset "utf-8";
/* ==========================================================================
   妙排网络 · 站群排名页面样式（深色暗紫 + 霓虹粉）
   仅作用于 Station-group-ranking.html，前缀 sg- 避免与其它页面冲突
   ========================================================================== */
:root{
  --brand:#A855F7;
  --brand-2:#EC4899;
  --accent:#22D3EE;
  --ink:#F5EEFF;
  --text:#D4C8E8;
  --muted:#9C8DB5;
  --bg:#0D0716;
  --bg-soft:#150A24;
  --surface:#170C28;
  --surface-2:#1E1033;
  --border:rgba(168,85,247,.22);
  --border-strong:rgba(168,85,247,.46);
  --head-bg:rgba(13,7,22,.90);
  --head-text:#F5EEFF;
  --head-border:rgba(168,85,247,.18);
  --nav-hover-bg:rgba(168,85,247,.14);
  --foot-bg:#08040F;
  --foot-text:#9C8DB5;
  --foot-head:#F5EEFF;
  --foot-border:rgba(168,85,247,.16);
  --shadow:0 26px 64px rgba(0,0,0,.62);
  --shadow-sm:0 12px 30px rgba(0,0,0,.48);
}
body{background:var(--bg);color:var(--text)}
::selection{background:var(--brand-2);color:#0D0716}

/* ---------- 深色下的公共组件适配 ---------- */
.dropdown{background:#1E1033;border-color:var(--border);box-shadow:0 24px 60px rgba(0,0,0,.7)}
.dropdown a{color:var(--text)}
.dropdown a:hover{background:var(--nav-hover-bg);color:var(--brand-2)}
.table-wrap{background:var(--surface)}
.note{background:var(--surface-2)}
.dock-item{background:#1E1033;color:var(--ink);border-color:var(--border)}
.dock-item:hover{color:var(--brand-2)}
.wx-pop{background:#1E1033;border-color:var(--border)}
.wx-pop p{color:var(--muted)}
.wx-pop p b{color:var(--ink)}
.btn-line{color:var(--ink);border-color:var(--border-strong)}
.btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
  box-shadow:0 10px 26px rgba(168,85,247,.32)}
.btn-primary:hover{box-shadow:0 16px 34px rgba(168,85,247,.40)}
.stats b small{font-size:.5em;font-weight:800;margin-left:2px}

/* ---------- 1. 首屏：暗紫光晕 + 点阵 ---------- */
.sg-hero{
  padding:clamp(44px,5.6vw,84px) 0 clamp(40px,5vw,72px);
  background:
    radial-gradient(720px 380px at 10% -4%,rgba(168,85,247,.28),transparent 62%),
    radial-gradient(620px 340px at 94% 10%,rgba(236,72,153,.20),transparent 66%),
    linear-gradient(180deg,#0D0716 0%,#130A22 68%,#170C28 100%);
}
.sg-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
  background-image:radial-gradient(rgba(168,85,247,.26) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 76%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 76%);
}
.sg-hero .container{position:relative;z-index:1}
.sg-hero h1{text-shadow:0 0 42px rgba(168,85,247,.34)}
.sg-hero .hero-visual img{border:1px solid var(--border);border-radius:20px;
  box-shadow:0 28px 64px rgba(0,0,0,.62)}
.sg-cta{background:rgba(30,16,51,.88);border-color:var(--border-strong);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.sg-cta .t b{color:var(--ink)}

/* ---------- 2. 四种排名方式 ---------- */
.sg-way{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(30,16,51,.94),rgba(23,12,40,.76));
  border:1px solid var(--border);border-radius:18px;padding:26px 24px;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.sg-way::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(.22);transform-origin:left;transition:transform .35s ease;
}
.sg-way:hover{transform:translateY(-5px);border-color:var(--border-strong);
  box-shadow:0 22px 50px rgba(168,85,247,.20)}
.sg-way:hover::before{transform:scaleX(1)}
.sg-badge{
  position:absolute;right:16px;top:16px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:800;letter-spacing:.5px;color:#0D0716;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.sg-badge--hot{background:linear-gradient(135deg,#F59E0B,#EC4899)}
.sg-way h3{margin:6px 0 10px;font-size:17.5px;color:var(--ink);padding-right:56px}
.sg-way p{color:var(--muted);font-size:14.4px;line-height:1.85;margin:0}
.sg-mini{display:grid;gap:9px;margin:16px 0 20px}
.sg-mini li{position:relative;padding-left:20px;font-size:14px;color:var(--text)}
.sg-mini li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.sg-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:800;color:var(--brand-2);
}
.sg-link::after{
  content:"";width:7px;height:7px;flex:0 0 auto;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(-45deg);transition:transform .25s;
}
.sg-link:hover::after{transform:rotate(-45deg) translateX(3px)}

/* ---------- 3. 案例相册：纯 CSS 分类切换 ---------- */
.sg-cases{position:relative}
.sg-tab-in{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.sg-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:26px}
.sg-tabs label{
  cursor:pointer;-webkit-user-select:none;user-select:none;
  padding:11px 24px;border-radius:999px;font-size:14.5px;font-weight:700;
  color:var(--muted);background:var(--surface);border:1px solid var(--border);
  transition:color .2s,background .2s,border-color .2s,box-shadow .2s;
}
.sg-tabs label:hover{color:var(--ink);border-color:var(--border-strong)}
#sgTab1:checked ~ .sg-tabs label[for="sgTab1"],
#sgTab2:checked ~ .sg-tabs label[for="sgTab2"],
#sgTab3:checked ~ .sg-tabs label[for="sgTab3"],
#sgTab4:checked ~ .sg-tabs label[for="sgTab4"]{
  color:#fff;border-color:transparent;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 12px 28px rgba(168,85,247,.36);
}
#sgTab1:focus-visible ~ .sg-tabs label[for="sgTab1"],
#sgTab2:focus-visible ~ .sg-tabs label[for="sgTab2"],
#sgTab3:focus-visible ~ .sg-tabs label[for="sgTab3"],
#sgTab4:focus-visible ~ .sg-tabs label[for="sgTab4"]{
  outline:2px solid var(--brand-2);outline-offset:3px;
}
.sg-panel{display:none;gap:16px;grid-template-columns:repeat(3,1fr)}
#sgTab1:checked ~ .sg-panels .sg-panel--spider,
#sgTab2:checked ~ .sg-panels .sg-panel--zhanqun,
#sgTab3:checked ~ .sg-panels .sg-panel--single,
#sgTab4:checked ~ .sg-panels .sg-panel--website{display:grid}
.sg-panel figure{
  margin:0;position:relative;overflow:hidden;background:var(--surface);
  border:1px solid var(--border);border-radius:14px;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.sg-panel figure:hover{transform:translateY(-3px);border-color:var(--border-strong);
  box-shadow:0 18px 40px rgba(168,85,247,.22)}
.sg-panel img{width:100%;height:auto;display:block}
.sg-case-note{
  margin-top:24px;text-align:center;font-size:13px;color:var(--muted);line-height:1.8;
}

/* ---------- 4. 为什么选择 ---------- */
.sg-adv article{
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  padding:26px 24px;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.sg-adv article:hover{transform:translateY(-4px);border-color:var(--border-strong);
  box-shadow:0 20px 46px rgba(168,85,247,.18)}
.sg-adv h3{margin-bottom:10px;font-size:17px;color:var(--ink)}
.sg-adv h3::after{
  content:"";display:block;width:28px;height:2.6px;margin-top:12px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.sg-adv p{color:var(--muted);font-size:14.5px;line-height:1.85;margin:12px 0 0}

/* ---------- 5. 技术栈 ---------- */
.sg-tech{max-width:900px;margin:0 auto}
.sg-tech li{
  margin-bottom:0;padding:18px 22px 18px 50px;font-size:15px;line-height:1.85;
  color:var(--text);background:var(--surface);
  border:1px solid var(--border);border-radius:14px;
}
.sg-tech li::before{left:18px;top:18px}
.sg-tech li + li{margin-top:12px}
.sg-tech strong{color:var(--brand-2);font-weight:800}

/* ---------- 6. 担保合作 ---------- */
.sg-guarantee{
  display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(22px,3vw,42px);align-items:center;
  padding:clamp(26px,3.4vw,44px);border-radius:22px;
  border:1px solid var(--border-strong);
  background:
    radial-gradient(520px 260px at 88% 8%,rgba(236,72,153,.18),transparent 66%),
    linear-gradient(135deg,rgba(168,85,247,.18),rgba(23,12,40,.86));
}
.sg-guarantee-txt h2{margin:12px 0 14px}
.sg-guarantee-txt p{color:var(--text);margin:0}
.sg-tags{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.sg-tags li{
  padding:14px 16px;border-radius:12px;text-align:center;
  font-size:14px;font-weight:700;color:var(--ink);
  background:rgba(13,7,22,.55);border:1px solid var(--border);
}

/* ---------- 7. FAQ ---------- */
.sg-faq details{background:rgba(30,16,51,.80)}
.sg-faq details[open]{border-color:var(--border-strong);box-shadow:0 0 30px rgba(168,85,247,.20)}
.sg-faq .faq-body a{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1080px){
  .main-nav{background:#150A24}
  .sg-panel{grid-template-columns:repeat(2,1fr)}
  .sg-guarantee{grid-template-columns:1fr}
}
@media (max-width:720px){
  .sg-hero{padding:38px 0 44px}
  .sg-way{padding:22px 20px}
  .sg-way h3{font-size:16.5px}
  .sg-tabs{gap:8px}
  .sg-tabs label{padding:10px 18px;font-size:13.5px}
  .sg-panel,.sg-tags{grid-template-columns:1fr}
  .sg-guarantee{padding:24px 20px;border-radius:18px}
  .sg-tech li{padding:16px 18px 16px 46px;font-size:14.5px}
  .sg-tech li::before{left:16px;top:16px}
}