@charset "utf-8";
/* ==========================================================================
   妙排网络 · SEO培训页面样式（极夜蓝 + 电光青）
   仅作用于 seo-training.html，前缀 st- 避免与其它页面冲突
   ========================================================================== */
:root{
  --brand:#22D3EE;
  --brand-2:#3B82F6;
  --accent:#F59E0B;
  --ink:#EAF2FF;
  --text:#C3D2EA;
  --muted:#8FA3C2;
  --bg:#070E1E;
  --bg-soft:#0A1428;
  --surface:#0E1A32;
  --surface-2:#12203C;
  --border:rgba(34,211,238,.18);
  --border-strong:rgba(34,211,238,.38);
  --head-bg:rgba(7,14,30,.88);
  --head-text:#EAF2FF;
  --head-border:rgba(34,211,238,.14);
  --nav-hover-bg:rgba(34,211,238,.12);
  --foot-bg:#050B18;
  --foot-text:#8FA3C2;
  --foot-head:#EAF2FF;
  --foot-border:rgba(34,211,238,.12);
  --shadow:0 26px 64px rgba(0,0,0,.58);
  --shadow-sm:0 12px 30px rgba(0,0,0,.45);
}
body{background:var(--bg);color:var(--text)}
::selection{background:var(--brand);color:#071020}

/* ---------- 深色下的公共组件适配 ---------- */
.dropdown{background:#0E1A32;border-color:var(--border);box-shadow:0 24px 60px rgba(0,0,0,.66)}
.dropdown a{color:var(--text)}
.dropdown a:hover{background:var(--nav-hover-bg);color:var(--brand)}
.table-wrap{background:var(--surface)}
.note{background:var(--surface-2)}
.nav-toggle{background:var(--surface-2)}
.dock-item{background:#0E1A32;color:var(--ink);border-color:var(--border)}
.dock-item:hover{color:var(--brand)}
.wx-pop{background:#0E1A32;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-line:hover{color:var(--brand);border-color:var(--brand);background:var(--nav-hover-bg)}
.btn-primary{background:linear-gradient(135deg,#0E7490 0%,#1D4ED8 100%);box-shadow:0 12px 28px rgba(29,78,216,.36)}
.btn-primary:hover{box-shadow:0 18px 38px rgba(29,78,216,.44)}
.checklist li::before{
  background:linear-gradient(135deg,var(--brand),var(--brand-2)) url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23071020' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px 12px no-repeat;
}
.hero-points li::before{
  background:var(--brand) url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23071020' stroke-width='3.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/10px 10px no-repeat;
}
.num-list li::before{background:linear-gradient(135deg,#0E7490,#1D4ED8)}
.cta-band{
  background-image:
    linear-gradient(135deg,rgba(4,8,24,.20),rgba(4,8,24,.42)),
    linear-gradient(135deg,#0B5FA5 0%,#0E7490 100%);
}
.cta-band .btn-light{color:#0B5FA5}
.cta-band .btn-light:hover{color:#0B5FA5}
.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;
}

/* ---------- 1. 首屏：极夜蓝光晕 + 左文右图 ---------- */
.st-hero{position:relative;overflow:hidden;
  padding:clamp(40px,5.4vw,78px) 0 clamp(38px,4.6vw,68px);
  background:
    radial-gradient(900px 460px at 78% -12%,rgba(34,211,238,.18),transparent 62%),
    radial-gradient(680px 420px at 6% 8%,rgba(29,78,216,.24),transparent 66%),
    linear-gradient(180deg,#070E1E 0%,#091228 62%,#0A1428 100%);
}
.st-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(34,211,238,.16) 1px,transparent 1px);
  background-size:34px 34px;opacity:.5;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 72%);
}
.st-hero .container{position:relative;z-index:1}
.st-hero h1{max-width:640px}
.st-hero .hero-lead{max-width:600px}
.st-hero .eyebrow{background:rgba(34,211,238,.10);border-color:var(--border-strong);color:var(--brand)}
.st-hero .hero-lead .hl{color:var(--brand);font-weight:800}
.st-cta{background:rgba(14,26,50,.92);border-color:var(--border-strong);box-shadow:0 18px 44px rgba(0,0,0,.45)}
.st-cta .t{flex:1 1 100%;font-size:13px}
.st-cta .t b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
.st-hero .hero-visual{position:relative}
.st-hero .hero-visual::before{
  content:"";position:absolute;inset:-14% -8% 4% -8%;
  background:radial-gradient(closest-side,rgba(34,211,238,.26),transparent 72%);filter:blur(6px);
}
.st-hero .hero-visual img{position:relative;z-index:1;border:1px solid var(--border);border-radius:20px;
  box-shadow:0 30px 70px rgba(0,0,0,.6)}

/* ---------- 2. 数据条 ---------- */
.st-hero ~ .sec .stats b{color:var(--brand)}
.stats{border-color:var(--border)}
.stats b{color:var(--brand)}
.stats b small{font-size:.52em;font-weight:800;margin-left:2px}

/* ---------- 3. 讲师：左头像右文案 ---------- */
.st-tutor{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(24px,3.4vw,46px);align-items:center}
.st-tutor-visual{position:relative;text-align:center;
  background:linear-gradient(180deg,rgba(34,211,238,.12),rgba(14,26,50,.86));
  border:1px solid var(--border-strong);border-radius:24px;
  padding:clamp(26px,3vw,38px) 24px;box-shadow:0 26px 60px rgba(0,0,0,.5)}
.st-tutor-visual::before{
  content:"";position:absolute;inset:10px;border:1px solid rgba(34,211,238,.16);
  border-radius:17px;pointer-events:none;
}
.st-tutor-visual img{width:min(220px,62%);height:auto;margin:0 auto 18px;border-radius:50%;
  border:2px solid var(--brand);box-shadow:0 0 0 8px rgba(34,211,238,.08)}
.st-tutor-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 20px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:800;letter-spacing:.6px;color:#071020;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.st-tutor-copy h2{margin:12px 0 14px}
.st-tutor-copy p{color:var(--muted);font-size:15px;line-height:1.92}
.st-tags{margin-top:18px}

/* ---------- 4. 选课建议提示 ---------- */
.st-note{flex-direction:column;gap:6px;margin-top:22px;
  background:rgba(34,211,238,.06);border-color:var(--border-strong)}
.st-note span{font-weight:800;color:var(--brand)}
.st-note p{color:var(--text);font-size:14.4px}

/* ---------- 5. 课程收益：编号列表卡 ---------- */
.st-gain{grid-template-columns:repeat(3,1fr)}
.st-gain li{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  padding:26px 24px 24px;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.st-gain li::after{
  content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.st-gain li:hover{transform:translateY(-5px);border-color:var(--border-strong);box-shadow:0 20px 46px rgba(0,0,0,.45)}
.st-gain li:hover::after{transform:scaleX(1)}
.st-gain b{display:block;font-size:22px;font-weight:900;letter-spacing:1px;
  color:transparent;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text}
.st-gain h3{margin:10px 0 8px;font-size:17px}
.st-gain p{color:var(--muted);font-size:14.5px;margin:0}

/* ---------- 6. 适合谁 ---------- */
.st-fit{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.st-fit-col{border:1px solid var(--border);border-radius:20px;padding:clamp(22px,2.6vw,30px)}
.st-fit-col h3{margin-bottom:16px;font-size:19px}
.st-fit-yes{background:linear-gradient(180deg,rgba(34,211,238,.10),rgba(14,26,50,.80))}
.st-fit-yes h3{color:var(--brand)}
.st-fit-no{background:rgba(14,26,50,.82)}
.st-fit-no h3{color:var(--accent)}
.st-no{display:grid;gap:11px}
.st-no li{position:relative;padding-left:26px;color:var(--text);font-size:15px}
.st-no li::before{content:"";position:absolute;left:2px;top:12px;width:12px;height:2.4px;
  background:var(--accent);border-radius:2px}
.st-fit-note{margin-top:18px;padding-top:16px;border-top:1px dashed var(--border-strong);
  font-size:14px;color:var(--muted)}
.st-fit-note a{color:var(--brand)}

/* ---------- 7. 学习路径：竖向时间轴 ---------- */
.st-path{position:relative;display:grid;gap:0;counter-reset:n}
.st-path li{padding:0 0 26px 56px;margin:0}
.st-path li::after{
  content:"";position:absolute;left:14px;top:34px;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--border-strong),transparent);
}
.st-path li:last-child{padding-bottom:0}
.st-path li:last-child::after{display:none}
.st-path li::before{width:30px;height:30px;border-radius:50%;font-size:12.5px}
.st-path li strong{display:block;margin-bottom:6px;color:var(--ink);font-size:16.5px}
.st-path li{color:var(--muted);font-size:14.8px;line-height:1.9}

/* ---------- 8. 交付物清单 ---------- */
.st-deliver{margin-top:30px;background:var(--surface);border:1px solid var(--border);
  border-radius:20px;padding:clamp(22px,2.8vw,30px);box-shadow:var(--shadow-sm)}
.st-deliver h3{margin-bottom:16px;font-size:18px;color:var(--brand)}
.st-deliver .checklist li{font-size:14.6px}

/* ---------- 9. FAQ ---------- */
.st-faq details{background:rgba(14,26,50,.86)}
.st-faq details[open]{border-color:var(--brand);box-shadow:0 0 30px rgba(34,211,238,.16)}
.st-faq summary::after{border-color:var(--brand)}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1080px){
  .main-nav{background:#0A1428}
  .st-tutor{grid-template-columns:1fr;gap:26px}
  .st-gain{grid-template-columns:1fr 1fr}
  .st-fit{grid-template-columns:1fr}
  .st-hero h1,.st-hero .hero-lead{max-width:none}
}
@media (max-width:720px){
  .st-gain{grid-template-columns:1fr}
  .st-tutor-visual{padding:24px 18px;border-radius:20px}
  .st-tutor-copy p{font-size:14.6px}
  .st-fit-col{padding:22px 18px}
  .st-path li{padding-left:48px}
  .st-deliver{padding:22px 18px}
  .stats b small{font-size:.5em}
}