/* ============================================================
   西安升学通 · 统一站点框架样式
   共享导航 / 页脚 / 留资弹窗 / 引擎卡片
   引入方式：<link rel="stylesheet" href="site.css">
   ============================================================ */
:root {
  --sx-primary: #2563eb;
  --sx-primary-dark: #1d4ed8;
  --sx-purple: #8b5cf6;
  --sx-accent: #f59e0b;
  --sx-success: #10b981;
  --sx-danger: #ef4444;
  --sx-light: #f8fafc;
  --sx-dark: #1e293b;
  --sx-border: #e2e8f0;
  --sx-muted: #64748b;
}

/* ---------- 顶部导航 ---------- */
.sx-nav {
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(10px);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.sx-nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 60px;
}
.sx-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
  white-space: nowrap;
}
.sx-brand .sx-logo {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--sx-primary), var(--sx-purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
}
.sx-brand small { font-weight: 500; font-size: .72rem; color: #94a3b8; display: block; margin-top: -2px; }
.sx-menu { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; align-items: center; }
.sx-menu li a {
  color: #cbd5e1; text-decoration: none; font-size: .92rem; font-weight: 500;
  padding: 8px 13px; border-radius: 8px; transition: all .2s; white-space: nowrap;
}
.sx-menu li a:hover, .sx-menu li a.sx-active { color: #fff; background: rgba(37,99,235,.25); }
.sx-menu li a.sx-cta {
  background: linear-gradient(135deg, var(--sx-primary), var(--sx-purple));
  color: #fff; font-weight: 700;
}
.sx-menu li a.sx-cta:hover { box-shadow: 0 4px 14px rgba(37,99,235,.5); }
.sx-nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; }

/* ---------- 页脚 ---------- */
.sx-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 44px 20px 30px;
  margin-top: 60px;
  font-size: .9rem;
}
.sx-footer-inner { max-width: 1280px; margin: 0 auto; }
.sx-footer-cols { display: flex; flex-wrap: wrap; gap: 40px; margin-bottom: 28px; }
.sx-footer-col h4 { color: #fff; font-size: .98rem; margin: 0 0 14px; }
.sx-footer-col a { display: block; color: #94a3b8; text-decoration: none; margin-bottom: 8px; font-size: .88rem; }
.sx-footer-col a:hover { color: #fff; }
.sx-footer-disclaim {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 18px; color: #64748b; font-size: .8rem; line-height: 1.7;
}
.sx-footer-disclaim b { color: #94a3b8; }

/* ---------- 通用英雄区 ---------- */
.sx-hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 55%, #312e81 100%);
  color: #fff; padding: 64px 20px 56px; text-align: center; position: relative; overflow: hidden;
}
.sx-hero h1 { font-size: 2.3rem; margin: 0 0 14px; font-weight: 800; letter-spacing: -0.5px; }
.sx-hero p.sx-tag { font-size: 1.05rem; color: #cbd5e1; margin: 0 auto 26px; max-width: 640px; line-height: 1.6; }
.sx-hero-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 22px; }
.sx-hero-badges span {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12);
  padding: 6px 14px; border-radius: 20px; font-size: .82rem; color: #e2e8f0;
}

/* ---------- 区块 ---------- */
.sx-section { max-width: 1180px; margin: 0 auto; padding: 52px 20px; }
.sx-section-head { text-align: center; margin-bottom: 34px; }
.sx-section-head h2 { font-size: 1.7rem; margin: 0 0 8px; color: var(--sx-dark); }
.sx-section-head p { color: var(--sx-muted); margin: 0; font-size: .96rem; }

/* ---------- 引擎卡片网格 ---------- */
.sx-engine-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.sx-engine-card {
  background: #fff; border: 1px solid var(--sx-border); border-radius: 16px;
  padding: 24px 22px; text-decoration: none; color: inherit; transition: all .25s;
  display: flex; flex-direction: column; gap: 10px;
}
.sx-engine-card:hover { transform: translateY(-4px); box-shadow: 0 14px 36px rgba(37,99,235,.14); border-color: var(--sx-primary); }
.sx-engine-card .sx-ico { font-size: 1.9rem; }
.sx-engine-card h3 { margin: 0; font-size: 1.12rem; color: var(--sx-dark); }
.sx-engine-card p { margin: 0; font-size: .86rem; color: var(--sx-muted); line-height: 1.55; }
.sx-engine-card .sx-go { margin-top: auto; color: var(--sx-primary); font-weight: 700; font-size: .88rem; }
.sx-engine-card.sx-live { border-color: var(--sx-primary); box-shadow: 0 6px 20px rgba(37,99,235,.1); }
.sx-engine-card .sx-badge {
  align-self: flex-start; font-size: .7rem; padding: 2px 9px; border-radius: 10px; font-weight: 700;
}
.sx-badge-live { background: #dcfce7; color: #166534; }
.sx-badge-soon { background: #fef3c7; color: #92400e; }

/* ---------- 表单 ---------- */
.sx-form-card {
  max-width: 560px; margin: 0 auto; background: #fff; border-radius: 18px;
  padding: 30px; box-shadow: 0 10px 30px rgba(15,23,42,.08);
}
.sx-row { display: flex; gap: 14px; flex-wrap: wrap; }
.sx-field { margin-bottom: 16px; flex: 1; min-width: 160px; }
.sx-field label { display: block; font-size: .85rem; color: #334155; margin-bottom: 6px; font-weight: 600; }
.sx-field .sx-req { color: var(--sx-danger); }
.sx-field input, .sx-field select {
  width: 100%; padding: 12px 13px; border: 1.5px solid var(--sx-border);
  border-radius: 10px; font-size: .98rem; font-family: inherit; background: #fff;
}
.sx-field input:focus, .sx-field select:focus { outline: none; border-color: var(--sx-primary); }
.sx-btn {
  width: 100%; padding: 14px; border: none; border-radius: 12px; cursor: pointer;
  background: linear-gradient(135deg, var(--sx-primary), var(--sx-purple)); color: #fff;
  font-size: 1.05rem; font-weight: 700; transition: box-shadow .2s;
}
.sx-btn:hover { box-shadow: 0 6px 18px rgba(37,99,235,.4); }
.sx-btn:disabled { opacity: .6; cursor: not-allowed; }
.sx-hint { font-size: .8rem; color: var(--sx-muted); text-align: center; margin-top: 12px; }

/* ---------- 留资弹窗 ---------- */
.sx-lead-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.55); z-index: 1300;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.sx-lead-mask.sx-show { display: flex; }
.sx-lead-box {
  background: #fff; border-radius: 18px; max-width: 420px; width: 100%;
  padding: 30px; position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.sx-lead-box h3 { font-size: 1.3rem; color: var(--sx-dark); margin: 0 0 6px; }
.sx-lead-box p.sub { color: var(--sx-muted); font-size: .9rem; margin: 0 0 20px; }
.sx-lead-close {
  position: absolute; top: 14px; right: 16px; font-size: 1.4rem; color: #94a3b8;
  background: none; border: none; cursor: pointer;
}
.sx-wechat-box {
  margin-top: 16px; text-align: center; border-top: 1px dashed var(--sx-border); padding-top: 16px;
}
.sx-wechat-box img { width: 140px; height: 140px; border-radius: 10px; }
.sx-wechat-box p { font-size: .82rem; color: var(--sx-muted); margin: 8px 0 0; }
.sx-success-ico { font-size: 3rem; text-align: center; }

/* ---------- 结果区 ---------- */
.sx-result { max-width: 1000px; margin: 24px auto 0; }
.sx-meta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.sx-meta {
  flex: 1; min-width: 150px; background: #fff; border: 1px solid var(--sx-border);
  border-radius: 14px; padding: 16px 18px; text-align: center;
}
.sx-meta .sx-k { font-size: .8rem; color: var(--sx-muted); }
.sx-meta .sx-v { font-size: 1.5rem; font-weight: 800; color: var(--sx-dark); margin-top: 4px; }
.sx-tier { margin-bottom: 22px; }
.sx-tier-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.sx-tier-head .sx-dot { width: 12px; height: 12px; border-radius: 50%; }
.sx-dot-chong { background: var(--sx-danger); }
.sx-dot-wen { background: var(--sx-accent); }
.sx-dot-bao { background: var(--sx-success); }
.sx-tier-head h3 { margin: 0; font-size: 1.15rem; }
.sx-school-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.sx-school {
  background: #fff; border: 1px solid var(--sx-border); border-radius: 12px; padding: 14px 16px;
  display: flex; flex-direction: column; gap: 4px;
}
.sx-school .sx-name { font-weight: 700; color: var(--sx-dark); font-size: .98rem; }
.sx-school .sx-sub { font-size: .8rem; color: var(--sx-muted); }
.sx-school .sx-prob { font-weight: 700; font-size: .92rem; }
.sx-prob-high { color: var(--sx-success); }
.sx-prob-mid { color: var(--sx-accent); }
.sx-prob-low { color: var(--sx-danger); }
.sx-lock {
  text-align: center; background: linear-gradient(135deg, #eff6ff, #f5f3ff);
  border: 1.5px dashed var(--sx-primary); border-radius: 16px; padding: 28px; margin-top: 10px;
}
.sx-lock h3 { margin: 0 0 8px; color: var(--sx-primary-dark); }
.sx-lock p { color: var(--sx-muted); margin: 0 0 18px; font-size: .92rem; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .sx-engine-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .sx-menu {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; background: #0f172a; padding: 12px 20px; gap: 4px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .sx-menu.sx-open { display: flex; }
  .sx-nav-toggle { display: block; }
  .sx-hero h1 { font-size: 1.7rem; }
  .sx-engine-grid { grid-template-columns: 1fr; }
}