/* ============================================================
   哲文单招官网 · 设计系统 (style.css)
   移动端优先 · 转化导向 · 教育信任风
   主色=学术深蓝(信任) / CTA=暖橙(行动) / 数据可后续调
   ============================================================ */
:root{
  --primary:#1A4FA0;        /* 学术深蓝 */
  --primary-dark:#123B7E;
  --primary-soft:#EAF1FB;
  --accent:#F5821F;         /* CTA 暖橙 */
  --accent-dark:#D96C0C;
  --accent-soft:#FFF3E6;
  --ink:#1B2434;            /* 正文 */
  --muted:#5B6779;          /* 次要文字 */
  --bg:#FFFFFF;
  --bg-soft:#F4F7FC;
  --line:#E4EAF3;
  --success:#16A34A;
  --danger:#DC2626;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(18,59,126,.08);
  --shadow-lg:0 14px 44px rgba(18,59,126,.14);
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:56px 0}
.sec-soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 36px}
.sec-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--accent-dark);background:var(--accent-soft);padding:5px 12px;border-radius:999px;margin-bottom:12px}
.sec-head h2{font-size:clamp(22px,4.4vw,32px);line-height:1.25;color:var(--primary-dark)}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border:none;cursor:pointer;border-radius:999px;padding:12px 24px;font-size:15px;transition:.18s;font-family:var(--font);text-align:center}
.btn-accent{background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;box-shadow:0 8px 22px rgba(245,130,31,.35)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(245,130,31,.42)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-soft)}
.btn-white{background:#fff;color:var(--primary-dark);box-shadow:var(--shadow)}
.btn-lg{padding:15px 32px;font-size:17px}
.btn-block{width:100%}

/* ---------- 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--primary-dark)}
.brand .logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#2E6BC4);display:grid;place-items:center;color:#fff;font-size:20px;font-weight:800;flex:none}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.05em}
.nav{display:none;gap:26px}
.nav a{color:var(--ink);font-weight:600;font-size:15px}
.nav a:hover{color:var(--primary)}
.topbar-cta{display:flex;align-items:center;gap:12px}
.tel{display:none;align-items:center;gap:6px;font-weight:800;color:var(--primary-dark);font-size:16px;white-space:nowrap}
.tel:hover{color:var(--accent-dark)}
.burger{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink)}
.burger span::before{top:-6px}.burger span::after{top:6px}
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--line);padding:10px 20px 18px}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 4px;border-bottom:1px dashed var(--line);font-weight:600;color:var(--ink)}
.mobile-menu .btn{margin-top:14px}

/* ---------- 首屏 Hero ---------- */
.hero{position:relative;background:linear-gradient(160deg,#0E2E63 0%,var(--primary-dark) 45%,#1A4FA0 100%);color:#fff;overflow:hidden;padding:64px 0 72px}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(245,130,31,.28),transparent 65%)}
.hero-in{position:relative;z-index:2;display:grid;gap:34px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;width:fit-content}
.hero h1{font-size:clamp(28px,6.4vw,46px);line-height:1.18;font-weight:800;letter-spacing:.01em}
.hero h1 em{font-style:normal;color:#FFC48A}
.hero-sub{margin-top:16px;font-size:clamp(15px,2.6vw,18px);color:#DCE6F6;max-width:600px}
.hero-cta{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px}
.hero-trust{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px 20px;font-size:13.5px;color:#E7EEF9}
.hero-trust i{color:#7BE3A6;font-style:normal;font-weight:800;margin-right:6px}
.hero-card{background:#fff;color:var(--ink);border-radius:18px;box-shadow:var(--shadow-lg);padding:24px}
.hero-card h3{font-size:18px;color:var(--primary-dark);margin-bottom:4px}
.hero-card .hc-sub{font-size:13px;color:var(--muted);margin-bottom:16px}
.mini-form .field{margin-bottom:12px}
.mini-form label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:var(--ink)}
.mini-form input,.mini-form select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);font-size:15px;font-family:var(--font);background:#fff;color:var(--ink)}
.mini-form input:focus,.mini-form select:focus{outline:none;border-color:var(--primary)}
.mini-form .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini-form .agree{font-size:12px;color:var(--muted);margin:6px 0 14px;line-height:1.5}
.form-msg{display:none;margin-top:10px;font-size:13.5px;font-weight:600;padding:10px 12px;border-radius:var(--radius-sm)}
.form-msg.ok{display:block;background:#E7F8EE;color:#14662F}
.form-msg.err{display:block;background:#FDECEC;color:#B02020}

/* ---------- 数据带 ---------- */
.stats{background:var(--primary-dark);color:#fff;padding:34px 0}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;text-align:center}
.stat b{display:block;font-size:clamp(26px,5vw,38px);font-weight:800;color:#FFC48A}
.stat span{font-size:13.5px;color:#CBD9F0}

/* ---------- 通用卡片网格 ---------- */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:1fr}
.g3{grid-template-columns:1fr}
.g4{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .ic{width:48px;height:48px;border-radius:12px;background:var(--primary-soft);display:grid;place-items:center;font-size:24px;margin-bottom:14px}
.card h3{font-size:17px;color:var(--primary-dark);margin-bottom:8px}
.card p{font-size:14px;color:var(--muted)}

/* ---------- 招生对象 ---------- */
.who .card{border-top:4px solid var(--primary)}
.who .card .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--accent-dark);background:var(--accent-soft);padding:3px 10px;border-radius:999px;margin-bottom:10px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{position:relative;padding:0 0 26px 18px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-24px;top:5px;width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 0 0 2px var(--accent-soft)}
.tl-item .tl-date{font-weight:800;color:var(--primary-dark);font-size:15px}
.tl-item .tl-txt{color:var(--muted);font-size:14px}

/* ---------- 班型价格 ---------- */
.price-grid{display:grid;gap:18px;grid-template-columns:1fr}
.price-card{position:relative;background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:26px 22px;display:flex;flex-direction:column;transition:.2s}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.price-card.featured{border-color:var(--accent);box-shadow:0 16px 44px rgba(245,130,31,.18)}
.price-flag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:999px;white-space:nowrap}
.price-card h3{font-size:19px;color:var(--primary-dark)}
.price-card .pc-desc{font-size:13px;color:var(--muted);margin:6px 0 16px;min-height:40px}
.price-num{display:flex;align-items:baseline;gap:4px;margin-bottom:4px}
.price-num .cur{font-size:16px;font-weight:700;color:var(--accent-dark)}
.price-num .val{font-size:38px;font-weight:800;color:var(--ink);line-height:1}
.price-num .unit{font-size:13px;color:var(--muted)}
.price-old{font-size:13px;color:var(--muted);text-decoration:line-through;margin-bottom:14px}
.price-card ul{list-style:none;margin:0 0 20px;flex:1}
.price-card li{font-size:13.5px;color:var(--ink);padding:7px 0;border-bottom:1px dashed var(--line);display:flex;gap:8px}
.price-card li::before{content:"✓";color:var(--success);font-weight:800}
.price-card li.no{color:var(--muted)}
.price-card li.no::before{content:"—";color:var(--line)}
.price-note{margin-top:18px;font-size:12.5px;color:var(--muted);text-align:center}

/* ---------- 上岸成果 ---------- */
.result-band{background:linear-gradient(135deg,#0E2E63,#1A4FA0);color:#fff;border-radius:20px;padding:34px 26px;display:grid;gap:26px}
.result-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;text-align:center}
.result-nums b{display:block;font-size:clamp(24px,5vw,34px);font-weight:800;color:#FFC48A}
.result-nums span{font-size:12.5px;color:#CBD9F0}
.result-txt h3{font-size:20px;margin-bottom:10px}
.result-txt p{font-size:14px;color:#DCE6F6;margin-bottom:8px}
.school-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.school-chips span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);font-size:12.5px;padding:5px 12px;border-radius:999px}

/* ---------- 校区 ---------- */
.campus{display:grid;gap:18px;grid-template-columns:1fr}
.campus-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.campus-img{height:150px;background:linear-gradient(135deg,var(--primary),#3E77CC);display:grid;place-items:center;color:#fff;font-weight:700;font-size:18px;position:relative}
.campus-img.alt{background:linear-gradient(135deg,#2C7A4B,#3FA565)}
.campus-body{padding:20px}
.campus-body h3{font-size:17px;color:var(--primary-dark);margin-bottom:6px}
.campus-body .addr{font-size:13.5px;color:var(--muted);margin-bottom:10px}
.env-chips{display:flex;flex-wrap:wrap;gap:7px}
.env-chips span{font-size:12px;background:var(--bg-soft);border:1px solid var(--line);padding:4px 10px;border-radius:999px;color:var(--ink)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;font-family:var(--font);font-size:15.5px;font-weight:700;color:var(--primary-dark);padding:18px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q .fx{flex:none;width:24px;height:24px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:800;transition:.2s}
.faq-item.open .faq-q .fx{transform:rotate(45deg);background:var(--accent);color:#fff}
.faq-a{display:none;padding:0 20px 18px;color:var(--muted);font-size:14.5px}
.faq-item.open .faq-a{display:block}

/* ---------- 留资大表单 ---------- */
.lead-wrap{display:grid;gap:24px;grid-template-columns:1fr}
.lead-info h2{font-size:clamp(22px,4vw,30px);color:var(--primary-dark);line-height:1.25}
.lead-info .li-sub{color:var(--muted);margin:12px 0 20px}
.lead-points{list-style:none;display:grid;gap:12px}
.lead-points li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px}
.lead-points .dot{flex:none;width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent-dark);display:grid;place-items:center;font-weight:800;font-size:13px}
.lead-form{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);padding:26px}
.lead-form h3{font-size:19px;color:var(--primary-dark);margin-bottom:4px}
.lead-form .lf-sub{font-size:13px;color:var(--muted);margin-bottom:18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px}
.field label .req{color:var(--danger)}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);font-size:15px;font-family:var(--font);background:#fff;color:var(--ink)}
.field textarea{min-height:80px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary)}
.field .hint{font-size:12px;color:var(--muted);margin-top:4px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-size:13.5px;cursor:pointer;font-weight:600;color:var(--ink);transition:.15s;user-select:none}
.chip.sel{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark)}

/* ---------- chips 单选(原生radio视觉隐藏) ---------- */
.chip{position:relative}
.chip input{position:absolute;opacity:0;pointer-events:none}
.chip:has(input:checked){border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark)}
.form-foot{font-size:12px;color:var(--muted);margin-top:10px;text-align:center}

/* ---------- 页脚 ---------- */
.footer{background:#0E2547;color:#CBD9F0;padding:46px 0 90px}
.foot-grid{display:grid;gap:26px;grid-template-columns:1fr}
.footer .brand{color:#fff}
.footer .brand .logo{background:linear-gradient(135deg,var(--accent),var(--accent-dark))}
.footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.footer p,.footer a{font-size:13.5px;color:#A9BDDC;line-height:1.9}
.footer a:hover{color:#fff}
.foot-tel{font-size:22px;font-weight:800;color:#FFC48A}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:18px;font-size:12.5px;color:#8FA6C9;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between}
.slogan{font-size:13px;color:#FFC48A;letter-spacing:.08em;margin-top:8px}

/* ---------- 移动端浮动操作条 ---------- */
.fab{position:fixed;left:0;right:0;bottom:0;z-index:70;display:grid;grid-template-columns:1fr 1fr;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(0,0,0,.08);padding:8px 10px calc(8px + env(safe-area-inset-bottom))}
.fab a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:12px;font-weight:700;border-radius:12px;padding:8px}
.fab .fab-call{color:var(--primary-dark);background:var(--primary-soft)}
.fab .fab-lead{color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-dark))}
.fab .fi{font-size:18px;line-height:1}

/* ---------- 显现动画 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 桌面端增强 ---------- */
@media(min-width:768px){
  section{padding:76px 0}
  .nav{display:flex}
  .tel{display:flex}
  .burger{display:none}
  .mobile-menu{display:none!important}
  .hero{padding:88px 0 96px}
  .hero-in{grid-template-columns:1.15fr .85fr;align-items:center}
  .stats-grid{grid-template-columns:repeat(4,1fr)}
  .g3{grid-template-columns:repeat(3,1fr)}
  .g4{grid-template-columns:repeat(4,1fr)}
  .g2{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:repeat(3,1fr)}
  .price-card.wide{grid-column:span 1}
  .result-band{grid-template-columns:1fr 1fr;align-items:center;padding:44px 40px}
  .campus{grid-template-columns:repeat(2,1fr)}
  .lead-wrap{grid-template-columns:1fr 1fr;align-items:start;gap:44px}
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr}
  .fab{display:none}
  .footer{padding-bottom:40px}
}
@media(min-width:768px){
  .price-grid.five{grid-template-columns:repeat(3,1fr)}
  .price-grid.five .price-card:last-child{grid-column:auto}
}