/* ==============================================
   新工科首页改版样式  xgk_new.css
   所有选择器以 .xn- 开头，避免与平台样式冲突
   ============================================== */
:root{
  --xn-text:#0b1739;
  --xn-muted:#68758d;
  --xn-blue:#356be8;
  --xn-card-border:#edf1f8;
  --xn-card-shadow:0 10px 28px rgba(39,68,125,.08);
  --xn-card-shadow-hover:0 18px 38px rgba(39,68,125,.14);
  --xn-radius:20px;
}

.xn-page{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--xn-text);
  background:#f3f7ff;
}
.xn-page a:hover{text-decoration:none}
.xn-page *{box-sizing:border-box}
.xn-page img{display:block}

.xn-wrap{width:min(1440px,94%);margin:auto}

/* Banner */
.xn-banner{position:relative;overflow:hidden;background:#dcecff}
.xn-banner img{width:100%;height:auto;aspect-ratio:64/15;object-fit:cover;object-position:center}

/* 主内容区 */
.xn-main{margin-top:-28px;position:relative;z-index:2}

/* 通用卡片区块 */
.xn-section{
  background:#fff;
  border-radius:22px;
  padding:30px 36px;
  margin-bottom:20px;
  box-shadow:0 14px 42px rgba(45,82,151,.08);
}
.xn-section-title{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  margin-bottom:22px;
}
.xn-section-title h2{margin:0;font-size:25px;color:var(--xn-text)}
.xn-section-title h2::before{
  content:"";display:inline-block;width:5px;height:22px;
  background:linear-gradient(#23b2ff,#5c54ff);
  border-radius:4px;margin-right:11px;vertical-align:-2px;
}
.xn-en{font-size:12px;color:#aab6d1;margin-left:10px}
.xn-more{font-size:13px;color:var(--xn-blue);text-decoration:none;white-space:nowrap}
.xn-more:hover{text-decoration:none}

/* ---- 虚拟实训 ---- */
.xn-training{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.xn-train{
  position:relative;aspect-ratio:16/9;border-radius:18px;overflow:hidden;
  color:#17233a;border:1px solid var(--xn-card-border);
  box-shadow:0 10px 28px rgba(39,68,125,.09);
  transition:transform .25s ease,box-shadow .25s ease;
  text-decoration:none;display:block;
}
.xn-train:hover{transform:translateY(-6px);box-shadow:0 18px 38px rgba(39,68,125,.15)}
.xn-train>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.xn-train::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(90deg,rgba(255,255,255,.98) 0%,rgba(255,255,255,.93) 38%,rgba(255,255,255,.48) 58%,rgba(255,255,255,0) 76%);
}
.xn-train-content{position:relative;z-index:2;width:58%;height:100%;padding:25px 24px;display:flex;flex-direction:column;justify-content:center}
.xn-train-head{display:flex;align-items:center;gap:9px;margin-bottom:12px}
.xn-train-icon{
  width:28px;height:28px;flex:0 0 28px;display:grid;place-items:center;
  border-radius:8px;background:rgba(255,255,255,.78);box-shadow:0 4px 12px rgba(50,80,140,.1);
}
.xn-train-icon svg{display:block;width:20px;height:20px}
.xn-train h3{margin:0;font-size:17px;font-weight:800;line-height:1.2;white-space:nowrap;letter-spacing:.1px}
.xn-train p{margin:0 0 16px;color:#5b677f;font-size:12px;line-height:1.7;width:100%}
.xn-train-stats{display:flex;gap:20px;font-size:12px;color:#65718a}
.xn-train-stats b{font-size:18px;font-weight:850;margin-right:4px}

.xn-train:nth-child(1) .xn-train-icon,.xn-train:nth-child(1) .xn-train-stats b{color:#ef7a2d}
.xn-train:nth-child(2) .xn-train-icon,.xn-train:nth-child(2) .xn-train-stats b{color:#67a92f}
.xn-train:nth-child(3) .xn-train-icon,.xn-train:nth-child(3) .xn-train-stats b{color:#2e86e8}
.xn-train:nth-child(4) .xn-train-icon,.xn-train:nth-child(4) .xn-train-stats b{color:#8054e8}
.xn-train:nth-child(5) .xn-train-icon,.xn-train:nth-child(5) .xn-train-stats b{color:#d9a117}
.xn-train:nth-child(6) .xn-train-icon,.xn-train:nth-child(6) .xn-train-stats b{color:#e95f72}

/* ---- 精选好课 ---- */
.xn-course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.xn-course{
  border:1px solid #e0e8f8;border-radius:15px;overflow:hidden;background:#fff;
  transition:transform .25s ease;text-decoration:none;display:block;color:inherit;
}
.xn-course:hover{transform:translateY(-5px)}
.xn-cover{
  aspect-ratio:16/9;position:relative;overflow:hidden;display:grid;place-items:center;
  background-color:#173c89;background-position:center;background-size:cover;background-repeat:no-repeat;
}
.xn-cover::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,24,57,.02),rgba(7,24,57,.34));
  transition:opacity .25s ease;
}
.xn-cover::after{
  content:"";position:absolute;inset:0;background:rgba(5,19,48,.16);
  opacity:0;transition:opacity .25s ease;pointer-events:none;
}
.xn-course:hover .xn-cover::before{opacity:.72}
.xn-course:hover .xn-cover::after{opacity:1}
.xn-course-tag{
  position:absolute;left:12px;top:12px;z-index:2;padding:5px 9px;border-radius:999px;
  color:#fff;background:rgba(8,27,64,.56);border:1px solid rgba(255,255,255,.38);
  backdrop-filter:blur(8px);font-size:11px;font-weight:750;
}
.xn-play{
  position:absolute;top:50%;left:50%;z-index:3;width:58px;height:58px;
  border-radius:50%;border:1px solid rgba(255,255,255,.86);background:rgba(255,255,255,.22);color:#fff;
  display:flex;align-items:center;justify-content:center;
  opacity:0;transform:translate(-50%,-50%) scale(.84);
  transition:opacity .25s ease,transform .25s ease,background .25s ease,color .25s ease;
  backdrop-filter:blur(10px);box-shadow:0 10px 26px rgba(12,34,78,.25);
}
.xn-play::before{
  content:"";width:0;height:0;margin-left:4px;
  border-top:8px solid transparent;border-bottom:8px solid transparent;
  border-left:13px solid currentColor;
}
.xn-course:hover .xn-play{opacity:1;transform:translate(-50%,-50%) scale(1)}
.xn-course-info{padding:14px}
.xn-course-info h4{margin:0 0 7px;font-size:14px;color:var(--xn-text)}
.xn-course-info p{margin:0;color:#7a86a1;font-size:12px}

/* ---- 岗位路径 ---- */
.xn-career-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.xn-career{
  position:relative;min-height:380px;overflow:hidden;
  border:1px solid var(--xn-card-border);border-radius:var(--xn-radius);background:#fff;
  box-shadow:var(--xn-card-shadow);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
  text-decoration:none;display:block;color:inherit;
}
.xn-career:hover{transform:translateY(-7px);border-color:#dfe8ff;box-shadow:0 20px 44px rgba(39,68,125,.14)}
.xn-career-bg{
  display:block;width:100%;height:220px;padding:20px 20px 0;
  object-fit:contain;object-position:center;
  background:linear-gradient(180deg,#fbfcff,#fff);transition:transform .4s ease;
}
.xn-career:hover .xn-career-bg{transform:scale(1.025)}
.xn-career-content{
  padding:10px 26px 24px;display:flex;align-items:center;flex-direction:column;text-align:center;
}
.xn-career h3{margin:0 0 10px;color:#17233a;font-size:20px;line-height:1.35;font-weight:750;white-space:nowrap}
.xn-career p{min-height:40px;margin:0;color:var(--xn-muted);font-size:13px;line-height:1.75}
.xn-career .xn-start{
  margin-top:16px;padding:10px 28px;border:0;border-radius:22px;color:#fff;
  font-size:14px;font-weight:700;cursor:pointer;
  background:linear-gradient(90deg,#3275ff,#4261ee);
  box-shadow:0 8px 18px rgba(56,105,246,.22);
  transition:transform .22s ease,box-shadow .22s ease;
  display:inline-block;text-decoration:none;
}
.xn-career:hover .xn-start{transform:translateY(-2px);box-shadow:0 12px 24px rgba(56,105,246,.3)}

/* 岗位路径按钮颜色变体 */
.xn-career-java .xn-start{background:linear-gradient(90deg,#ff9a4d,#ff6d3f);box-shadow:0 8px 18px rgba(255,119,65,.22)}
.xn-career-php .xn-start{background:linear-gradient(90deg,#b56cff,#7544ee);box-shadow:0 8px 18px rgba(132,76,238,.22)}
.xn-career-unity .xn-start{background:linear-gradient(90deg,#28cfd0,#17b9c5);box-shadow:0 8px 18px rgba(31,194,199,.22)}
.xn-career-android .xn-start{background:linear-gradient(90deg,#74da45,#4ec737);box-shadow:0 8px 18px rgba(83,198,58,.22)}

/* ---- 知识体系图 ---- */
.xn-knowledge{
  background:#fff url("../xgk_new_assets/knowledge-bg-v19.png") center center / 112% 112% no-repeat;
}
.xn-knowledge-grid{
  width:72%;margin-left:auto;
  display:grid;grid-template-columns:repeat(6,1fr);gap:14px;
}
.xn-knowledge-card{height:128px;perspective:800px}
.xn-flip{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .45s}
.xn-knowledge-card:hover .xn-flip{transform:rotateY(180deg)}
.xn-face{
  position:absolute;inset:0;border-radius:14px;
  background:rgba(255,255,255,.95);border:1px solid #dfe8f8;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  backface-visibility:hidden;
}
.xn-face img{width:52px;height:48px;object-fit:contain;margin-bottom:8px}
.xn-face .xn-face-icon{width:42px;height:42px;margin-bottom:8px;display:flex;align-items:center;justify-content:center}
.xn-face span{font-size:12px;font-weight:700;color:var(--xn-text)}
.xn-back{transform:rotateY(180deg);background:linear-gradient(145deg,#2d65eb,#6644ed);color:#fff}
.xn-back span{color:#fff;margin:0;line-height:1.35;font-size:13px;text-align:center;padding:0 8px}
.xn-back a{
  margin-top:8px;display:inline-block;padding:7px 14px;border-radius:14px;
  color:#2f66e8;background:#fff;font-weight:700;font-size:12px;
  text-decoration:none;transition:transform .2s;
}
.xn-back a:hover{transform:scale(1.05)}

/* ---- 智能题库 ---- */
.xn-question-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.xn-question{
  height:168px;display:grid;grid-template-columns:36% 64%;align-items:center;overflow:hidden;
  border:1px solid #e5ebf7;border-radius:18px;
  background:linear-gradient(135deg,#fff,#fbfdff);
  box-shadow:0 10px 26px rgba(39,69,126,.08);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  text-decoration:none;color:inherit;display:grid;
}
.xn-question:hover{transform:translateY(-5px);box-shadow:0 17px 36px rgba(39,69,126,.15);border-color:#d9e4f7}
.xn-q-visual{height:100%;display:flex;align-items:center;justify-content:center;padding:16px 4px 16px 16px;overflow:hidden}
.xn-q-visual img{width:100%;height:100%;object-fit:contain;object-position:center;mix-blend-mode:multiply;transform:scale(1.12)}
.xn-q-content{padding:20px 20px 20px 10px;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;min-width:0}
.xn-q-content h3{margin:0 0 9px;font-size:18px;line-height:1.25;font-weight:800;color:#1765ef;white-space:nowrap}
.xn-question:nth-child(2) .xn-q-content h3{color:#21ad50}
.xn-question:nth-child(3) .xn-q-content h3{color:#7950e8}
.xn-q-content p{margin:0 0 12px;color:#5d687e;font-size:12px;line-height:1.7}
.xn-q-btn{
  display:inline-block;color:#1765ef;font-size:12px;font-weight:750;text-decoration:none;
  transition:transform .2s ease;
}
.xn-question:nth-child(2) .xn-q-btn{color:#21ad50}
.xn-question:nth-child(3) .xn-q-btn{color:#7950e8}
.xn-q-btn:hover{transform:translateX(3px)}

/* ---- 产品介绍 ---- */
.xn-product{
  position:relative;height:310px;border-radius:22px;overflow:hidden;margin-bottom:35px;
  background:#eef5ff;box-shadow:0 14px 42px rgba(45,82,151,.08);
}
.xn-product>img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;transform:scale(1.1);transform-origin:center;
}
.xn-product::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,rgba(255,250,245,.24) 0%,rgba(255,255,255,.08) 44%,rgba(255,255,255,0) 66%);
}
.xn-product-content{
  position:relative;z-index:2;width:48%;height:100%;padding:42px 40px 38px 84px;color:#14213d;
  display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
}
.xn-product-content h2{
  position:relative;margin:0 0 16px;padding:0 46px;color:#102046;font-size:28px;font-weight:800;line-height:1.2;letter-spacing:1px;
}
.xn-product-content h2::before,.xn-product-content h2::after{
  content:"";position:absolute;top:50%;width:34px;height:8px;transform:translateY(-50%);
  background:radial-gradient(circle,#ff9f2f 3px,transparent 4px) 0 0/12px 8px repeat-x;
}
.xn-product-content h2::before{left:0}
.xn-product-content h2::after{right:0}
.xn-product-content p{max-width:470px;margin:0 0 22px;color:#58647b;font-size:15px;line-height:1.85}
.xn-product-btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 26px;
  background:linear-gradient(135deg,#356be8,#5c54ff);color:#fff;
  border-radius:30px;font-size:14px;font-weight:600;text-decoration:none;
  box-shadow:0 6px 18px rgba(53,107,232,.35);transition:transform .2s,box-shadow .2s;
}
.xn-product-btn:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(53,107,232,.5);color:#fff;text-decoration:none}

/* ---- AI 教练 ---- */
.xn-coach-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.xn-coach-card{
  border-radius:18px;overflow:hidden;background:#fff;
  border:1.5px solid #edf1f8;
  box-shadow:var(--xn-card-shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.xn-coach-card:hover{transform:translateY(-5px);box-shadow:var(--xn-card-shadow-hover);border-color:color-mix(in srgb,var(--xn-coach,#2f72f4) 24%,#e6edf8)}
.xn-coach-visual{
  position:relative;height:180px;overflow:hidden;
  background:linear-gradient(145deg,color-mix(in srgb,var(--xn-coach,#2f72f4) 12%,#fff),#fff 78%);
}
.xn-coach-visual img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.xn-coach-card:hover .xn-coach-visual img{transform:scale(1.04)}
.xn-coach-mark{
  position:absolute;top:14px;left:14px;
  padding:3px 10px;border-radius:10px;
  color:#fff;background:var(--xn-coach,#2f72f4);
  font-size:12px;font-weight:800;
  box-shadow:0 5px 12px color-mix(in srgb,var(--xn-coach,#2f72f4) 35%,transparent);
}
.xn-coach-info{padding:18px 20px 20px}
.xn-coach-info h3{margin:0 0 8px;color:var(--xn-coach,#2f72f4);font-size:17px;font-weight:800;line-height:1.3}
.xn-coach-info p{min-height:44px;margin:0;color:#637087;font-size:13px;line-height:1.75}
.xn-coach-entry{display:inline-flex;align-items:center;gap:5px;margin-top:12px;color:var(--xn-coach,#2f72f4);font-size:13px;font-weight:700}

/* ---- header 登录按钮居中（覆盖 cy_new.css padding-top:23px + itye.css margin-top:30px 叠加导致的沉底问题）---- */
.site-login{margin-top:8px!important}

/* ---- 响应式 ---- */
@media(max-width:1100px){
  .xn-coach-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .xn-training{grid-template-columns:repeat(2,1fr)}
  .xn-career-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .xn-knowledge-grid{width:100%;grid-template-columns:repeat(4,1fr)}
  .xn-question-grid{grid-template-columns:1fr}
  .xn-question{height:170px;grid-template-columns:210px 1fr}
  .xn-q-visual{padding-left:22px}
}
@media(max-width:900px){
  .xn-product{height:320px}
  .xn-product-content{width:58%;padding-left:42px}
  .xn-product-content h2{font-size:24px}
}
@media(max-width:700px){
  .xn-coach-grid,.xn-training,.xn-course-grid,.xn-career-grid{grid-template-columns:1fr}
  .xn-knowledge-grid{grid-template-columns:repeat(2,1fr)}
  .xn-question{height:auto;min-height:160px;grid-template-columns:38% 62%}
  .xn-product{height:390px}
  .xn-product>img{object-position:68% center;opacity:.74}
  .xn-product::after{background:rgba(255,255,255,.7)}
  .xn-product-content{width:100%;padding:42px 28px;align-items:center;text-align:center}
  .xn-section{padding:22px 18px}
}