/* 星火网校 静态站 — 共享样式（贴近原站：明亮、薄荷绿点缀） */
:root{
  --brand:#00c55d;
  --brand-dark:#00a64e;
  --brand-light:#e8faf0;
  --mint:#f1faf4;          /* 浅薄荷分区底 */
  --mint-2:#eaf7ef;
  --ink:#282b3d;           /* 主标题深色 */
  --text:#464646;
  --text-2:#5b6168;
  --text-3:#7b8087;
  --muted:#9aa3ab;
  --line:#ececec;
  --line-2:#e8ebee;
  --bg:#ffffff;
  --radius:14px;
  --shadow:0 10px 30px rgba(40,43,61,.08);
  --shadow-sm:0 4px 14px rgba(40,43,61,.06);
  --max:1160px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.layout-main{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.site-header__inner{display:flex;align-items:center;height:66px;gap:28px}
.site-logo img{height:32px;width:auto}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.site-nav a{position:relative;padding:8px 14px;color:var(--text);font-size:15px;border-radius:8px;transition:color .15s;white-space:nowrap}
.site-nav a:hover{color:var(--brand)}
.site-nav a.active{color:var(--brand);font-weight:600}
.site-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:3px;border-radius:3px;background:var(--brand)}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;cursor:pointer;padding:8px;width:42px;height:42px}
.nav-toggle span{display:block;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.2s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 30px;border-radius:30px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;border:0;cursor:pointer;transition:background .15s,transform .1s,box-shadow .15s}
.btn:hover{background:var(--brand-dark);box-shadow:0 8px 18px rgba(0,197,93,.28)}
.btn:active{transform:translateY(1px)}
.btn--ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn--ghost:hover{background:var(--brand-light);box-shadow:none}
.btn-wrap{text-align:center;margin-top:38px}

/* ===== Hero / 轮播 ===== */
.hero{position:relative;background:linear-gradient(180deg,#eafaf0 0%,#f4fbf6 100%);overflow:hidden}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;opacity:.5;z-index:0}
.hero::before{width:300px;height:300px;background:radial-gradient(circle,#bff0d4,transparent 70%);top:-80px;left:-60px}
.hero::after{width:240px;height:240px;background:radial-gradient(circle,#cfe8ff,transparent 70%);bottom:-70px;right:6%}
.hero-static{position:relative;z-index:1;line-height:0}
.hero-static img{width:100%;height:610px;object-fit:cover;display:block}
.carousel{position:relative;max-width:1200px;margin:0 auto;z-index:1}
.carousel__track{position:relative;height:380px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s ease;display:flex;align-items:center;justify-content:center}
.slide.active{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover;border-radius:0}
.carousel__dots{position:absolute;left:0;right:0;bottom:18px;display:flex;gap:10px;justify-content:center;z-index:3}
.carousel__dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.7);cursor:pointer;padding:0;transition:.2s}
.carousel__dots button.active{background:var(--brand);width:26px;border-radius:6px}
.carousel__arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:42px;height:42px;border-radius:50%;border:0;
  background:rgba(255,255,255,.55);color:var(--ink);font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.carousel__arrow:hover{background:#fff}
.carousel__arrow--prev{left:14px}
.carousel__arrow--next{right:14px}

/* ===== Sections ===== */
.section{padding:64px 0}
.section--mint{background:var(--mint)}
.section--gray{background:#f5f7f8}
.section__head{text-align:center;margin-bottom:44px}
.section__title{display:inline-flex;align-items:center;gap:16px;font-size:28px;font-weight:800;color:var(--ink);margin:0}
.section__title::before,.section__title::after{content:"";width:26px;height:18px;background:no-repeat center/contain;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 28 20'><path fill='%2300c55d' d='M14 20c0-7 4-12 12-13-1 8-5 12-12 13zM14 20C14 13 10 8 2 7c1 8 5 12 12 13z'/></svg>")}
.section__sub{color:var(--muted);font-size:15px;margin:12px 0 0}

/* generic grids */
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--5{grid-template-columns:repeat(5,1fr)}

/* teacher cards */
.teacher{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:28px 18px;text-align:center;transition:transform .15s,box-shadow .15s}
.teacher:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.teacher__avatar{width:92px;height:92px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid var(--brand-light)}
.teacher__name{font-weight:700;color:var(--brand-dark);font-size:17px;margin:0 0 6px}
.teacher__tag{display:inline-block;background:var(--brand-light);color:var(--brand-dark);font-size:12px;padding:2px 12px;border-radius:12px;margin:0 0 10px}
.teacher__subject {color:#7b8087;font-size:16px;height:16px}
.teacher__desc{color:var(--text-3);font-size:13px;margin:0;line-height:1.6;text-align: left;}

/* course-system illustration cards */
.course-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:34px 24px;text-align:center;transition:transform .15s,box-shadow .15s}
.course-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.course-card img{width:96px;height:96px;object-fit:contain;margin:0 auto 18px}
.course-card h3{margin:0 0 10px;font-size:19px;color:var(--ink)}
.course-card p{margin:0;color:var(--text-3);font-size:14px}

/* service photo cards */
.service-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card img{width:100%;height:180px;object-fit:cover}
.service-card__body{padding:20px 22px}
.service-card h3{margin:0 0 8px;font-size:18px;color:var(--ink)}
.service-card p{margin:0;color:var(--text-3);font-size:14px}

/* media section */
.media{display:flex;gap:40px;align-items:flex-start}
.media__pics{flex:0 0 42%;max-width:42%;display:grid;gap:16px}
.media__pics img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.media__list{flex:1}
.news-item{display:flex;gap:12px;padding:15px 0;border-bottom:1px dashed var(--line);color:var(--text)}
.news-item::before{content:"";flex:0 0 7px;height:7px;border-radius:50%;background:var(--brand);margin-top:10px}
.news-item:hover{color:var(--brand)}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 44px;max-width:960px;margin:0 auto}
.partners-band{margin-top:44px;text-align:center}
.partners-band__cap{color:var(--muted);font-size:14px;margin:0 0 18px}
.partners-band img{width:100%;max-width:1000px;margin:0 auto;opacity:.9}

/* qualification preview on home */
.cert-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cert-strip img{width:100%;height:150px;object-fit:contain;background:#fff;border:1px solid var(--line-2);border-radius:10px;padding:8px}

/* ===== Inner page ===== */
.page-hero{background:linear-gradient(180deg,#eafaf0,#f4fbf6);border-bottom:1px solid var(--line);padding:42px 0}
.page-hero h1{margin:0;font-size:28px;color:var(--ink)}
.page-hero .crumb{color:var(--muted);font-size:13px;margin-top:8px}
.page-hero .crumb a:hover{color:var(--brand)}
.page-body{padding:46px 0 66px}
.doc{max-width:880px;margin:0 auto;background:#fff}
.doc h2{font-size:20px;color:var(--ink);margin:34px 0 12px;padding-left:12px;border-left:4px solid var(--brand)}
.doc h3{font-size:16px;color:var(--text);margin:22px 0 8px}
.doc p{margin:10px 0;color:var(--text)}
.doc ol,.doc ul{margin:10px 0;padding-left:22px}
.doc li{margin:7px 0}
.doc .lead{color:var(--text-2);background:var(--mint);border:1px solid var(--mint-2);border-radius:10px;padding:14px 16px}
.doc .note{color:var(--muted);font-size:14px;margin-top:24px;padding-top:16px;border-top:1px solid var(--line)}

/* tabs */
.tabs{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.tab{padding:10px 30px;border-radius:28px;background:#fff;border:1px solid var(--line-2);color:var(--text);cursor:pointer;font-size:15px;transition:.15s}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* steps */
.steps{counter-reset:step;max-width:820px;margin:0 auto}
.step{position:relative;padding:0 0 26px 56px;border-left:2px solid var(--line-2);margin-left:18px}
.step:last-child{border-left-color:transparent}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:-18px;top:-2px;width:36px;height:36px;border-radius:50%;
  background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.step h3{margin:2px 0 6px;color:var(--ink)}
.step p{margin:0 0 6px;color:var(--text-3)}

/* honor */
.honorText {width: 1056px;margin: 38px auto 100px;font-size: 16px;color: #7b8087;letter-spacing: 0;text-align: center;line-height: 26px;}

/* qualification gallery */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cert{border:1px solid var(--line-2);border-radius:10px;overflow:hidden;background:#fff;cursor:zoom-in;transition:box-shadow .15s,transform .15s}
.cert:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.cert img{width:100%;height:200px;object-fit:contain;background:#fafafa;padding:8px}

/* lightbox */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.82);display:none;align-items:center;justify-content:center;z-index:100;padding:30px}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:90vh;object-fit:contain;border-radius:6px}
.lightbox__close{position:absolute;top:22px;right:30px;color:#fff;font-size:34px;cursor:pointer;line-height:1}

/* ===== Footer（还原原站底部） ===== */
.site-footer{background:#2b2f3f;color:#9aa1ac;padding:30px 0 28px;font-size:13px;line-height:2;text-align:center;margin-top:0}
.site-footer a{color:#9aa1ac;transition:color .15s}
.site-footer a:hover{color:#fff}
.footer-copy{margin:0 0 4px}
.footer-line{margin:0 0 4px}
.footer-nav{margin-top:14px;display:flex;flex-wrap:wrap;justify-content:center}
.footer-nav a{padding:0 18px;position:relative}
.footer-nav a:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);height:12px;width:1px;background:#4a4f5e}

/* ===== Responsive ===== */
@media (max-width:960px){
  .grid--4,.grid--5{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:1fr}
  .cert-grid,.cert-strip{grid-template-columns:repeat(3,1fr)}
  .carousel__track{height:300px}
  .media{flex-direction:column}
  .media__pics{max-width:100%;flex:none;width:100%;grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;left:0;right:0;top:66px;flex-direction:column;align-items:stretch;gap:0;background:#fff;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);margin-left:0;padding:8px 12px;display:none}
  .site-nav.open{display:flex}
  .site-nav a{padding:13px 10px;border-radius:0;border-bottom:1px solid var(--line)}
  .site-nav a.active::after{display:none}
  .site-nav a:last-child{border-bottom:0}
  .grid--4,.grid--5{grid-template-columns:repeat(2,1fr)}
  .cert-grid,.cert-strip{grid-template-columns:repeat(2,1fr)}
  .carousel__track{height:200px}
  .carousel__arrow{display:none}
  .news-grid{grid-template-columns:1fr}
  .section{padding:46px 0}
  .section__title{font-size:22px}
  .media__pics{grid-template-columns:1fr}
}