/* ============ 设计系统 v2 · 鸿桐教育 ============
   配色：教育深蓝（品牌） + 书页白 + 金色点缀（权威 + 温度）
   原则：克制、专业、留白充足、移动优先
*/

:root{
  --brand:#1F4E79;
  --brand-2:#2C5E8F;
  --brand-dark:#163a59;
  --accent:#C8922E;        /* 金色点缀 */
  --accent-2:#E0A93F;
  --ink:#1b1f24;
  --ink-2:#46505a;
  --ink-3:#67717c;
  --line:#e6ebf1;
  --bg:#ffffff;
  --bg-soft:#f4f7fb;
  --bg-tint:#eef3f9;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(22,58,89,.06),0 1px 2px rgba(22,58,89,.04);
  --shadow:0 10px 28px rgba(22,58,89,.10);
  --shadow-lg:0 20px 46px rgba(22,58,89,.16);
  --maxw:1120px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.3;color:var(--ink)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 顶部导航（sticky） ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--shadow-sm);border-color:var(--line);background:#fff}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;line-height:1.15}
.brand-logo{height:56px;width:auto;display:block}
.brand-name{font-size:20px;font-weight:700;color:var(--brand);letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--ink-3);margin-top:2px}

.site-nav{display:flex;align-items:center;gap:26px}
.site-nav a{font-size:15px;color:var(--ink-2);position:relative;padding:4px 0}
.site-nav a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.site-nav a:hover{color:var(--brand);text-decoration:none}
.site-nav a:hover::after,.site-nav a.is-active::after{transform:scaleX(1)}
.site-nav a.is-active{color:var(--brand);font-weight:600}
.nav-tel{font-size:15px;font-weight:700;color:var(--brand);white-space:nowrap}
.nav-tel::after{display:none}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:18px;height:2px;background:var(--brand);position:relative;transition:.2s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:10px;font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:transform .15s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease)}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-gold{background:var(--accent);color:#1c1405;box-shadow:0 6px 18px rgba(200,146,46,.30)}
.btn-gold:hover{background:var(--accent-2)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-2);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-ghost-dark{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-ghost-dark:hover{background:var(--bg-tint)}
.btn-sm{padding:9px 18px;font-size:14px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1100px 520px at 78% -10%,rgba(44,94,143,.42),transparent 60%),
    radial-gradient(700px 420px at 10% 120%,rgba(200,146,46,.14),transparent 55%),
    linear-gradient(135deg,rgba(15,63,107,.88),rgba(31,78,121,.82) 60%,rgba(22,58,89,.88)),
    url("hero-library.jpg") center/cover no-repeat,
    linear-gradient(135deg,var(--brand-dark),var(--brand) 60%,var(--brand-2));
}
.hero::after{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(900px 500px at 70% 0%,#000,transparent 75%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:78px 22px 84px}
.hero h1{font-size:38px;font-weight:700;letter-spacing:.5px;line-height:1.32}
.hero p{margin-top:18px;font-size:17px;color:#d8e5ef;max-width:560px}
.hero-actions{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.hero-card h3{color:#fff;font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.hero-card .kv{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.18);font-size:14px;color:#dceaf4}
.hero-card .kv:last-child{border-bottom:none}
.hero-card .kv b{color:#fff;font-weight:600;text-align:right}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#f3d9a8;background:rgba(200,146,46,.16);border:1px solid rgba(200,146,46,.4);padding:6px 12px;border-radius:999px;margin-bottom:18px}

/* ---------- 区块 ---------- */
section{padding:74px 0}
section.soft{background:var(--bg-soft)}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.5px;color:#8a6314;text-transform:uppercase;margin-bottom:10px}
.sec-title{font-size:28px;font-weight:700;color:var(--ink)}
.sec-desc{margin-top:12px;color:var(--ink-2);font-size:16px}
/* ---------- 内页页头条 ---------- */
.page-head{
  background:
    radial-gradient(900px 340px at 88% -60%,rgba(44,94,143,.14),transparent 62%),
    radial-gradient(560px 240px at 6% 140%,rgba(200,146,46,.08),transparent 55%),
    linear-gradient(180deg,var(--bg-tint),var(--bg-soft));
  border-bottom:1px solid var(--line);
}
.page-head .sec-title{font-size:32px}

/* ---------- 图标卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d3e0ec}
/* ---------- 合作出版社 logo 网格 ---------- */
.pub-grid{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.pub-grid a{display:flex;align-items:center;justify-content:center;width:140px;height:60px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.pub-grid a:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#d3e0ec}
.pub-grid img{max-width:100%;max-height:100%;object-fit:contain}
.group-h{font-size:16px;font-weight:700;margin:26px 0 12px;color:var(--brand)}
.card .ic{width:50px;height:50px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:var(--bg-tint);color:var(--brand);margin-bottom:16px}
.card .ic svg{width:26px;height:26px}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--brand);text-decoration:none}
.card p{font-size:14.5px;color:var(--ink-2)}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand)}
.card .more svg{width:15px;height:15px;transition:transform .2s var(--ease)}
.card:hover .more svg{transform:translateX(3px)}

/* ---------- 两栏 + 列表 ---------- */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.list li{display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:15.5px;color:var(--ink-2)}
.list li:last-child{border-bottom:none}
.list li .dot{flex:none;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:9px}
.list li b{color:var(--ink);font-weight:600}

/* ---------- 信任区 / 为什么选 ---------- */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust .item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.trust .item .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.trust .item .ic svg{width:24px;height:24px}
.trust .item h4{font-size:16px;margin-bottom:6px}
.trust .item p{font-size:14px;color:var(--ink-2)}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:none}
.tbl th{width:160px;color:var(--ink-3);font-weight:600;background:var(--bg-soft);white-space:nowrap}
.tbl td{color:var(--ink-2)}
.tbl details{font-size:14px}
.tbl summary{cursor:pointer;color:var(--brand);font-weight:600}
.tbl details>div{margin-top:10px;line-height:1.95}

/* ---------- 占位 / 说明框 ---------- */
.todo{display:inline-block;color:#8a5a00;background:#fdf5e3;border-left:3px solid #e0a800;padding:2px 9px;border-radius:3px;font-size:14px}
.notice{background:var(--bg-tint);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 22px;font-size:14.5px;color:var(--ink-2)}
.notice b{color:var(--ink)}
.empty{border:1.5px dashed var(--line);border-radius:var(--radius);padding:46px 24px;text-align:center;color:var(--ink-3);background:var(--bg-soft);font-size:15.5px}
.empty .big{font-size:17px;color:var(--ink-2);font-weight:600;margin-bottom:8px}

/* ---------- 表单 ---------- */
.form{max-width:600px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--ink-2);margin-bottom:7px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--ink);transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,78,121,.12)}
.field textarea{min-height:104px;resize:vertical}
.btn-primary{background:var(--brand);color:#fff;border:none;padding:13px 30px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit;transition:background .2s,transform .15s,box-shadow .2s}
.btn-primary:hover{background:var(--brand-2);box-shadow:var(--shadow);transform:translateY(-1px)}
a.btn-primary{text-decoration:none}
.privacy{margin-top:14px;font-size:13px;color:var(--ink-3);line-height:1.7}

/* ---------- 联系条 ---------- */
.contact-bar{background:var(--bg-tint);padding:40px 0}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;font-size:15px}
.contact-grid .k{font-size:13px;color:var(--ink-3);margin-bottom:6px;font-weight:600;letter-spacing:.5px}
.contact-grid .v{color:var(--ink);font-weight:600;font-size:16px}
.qr{width:180px;height:auto;border-radius:10px;border:1px solid var(--line);background:#fff;padding:6px;margin-top:8px}

/* ---------- CTA 横幅 ---------- */
.cta-band{background:linear-gradient(135deg,var(--brand-dark),var(--brand));color:#fff;border-radius:var(--radius);padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;box-shadow:var(--shadow);flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:23px}
.cta-band p{color:#d8e5ef;margin-top:8px;font-size:15px;max-width:560px}
.cta-band .btn-gold{white-space:nowrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-dark);color:#c9d8e4;padding:46px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:12px}
.site-footer p,.site-footer li{color:#c9d8e4;font-size:14px}
.site-footer ul{list-style:none}
.site-footer a{color:#c9d8e4}
.site-footer a:hover{color:#fff}
.footer-friends{margin-top:22px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px}
.footer-friends .fl-label{font-weight:600;color:#fff}
.footer-friends a{color:#c9d8e4;text-decoration:none}
.footer-friends a:hover{color:#fff;text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:18px;font-size:13px;color:#9fb6c8;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.footer-logo{height:46px;width:auto;display:block;margin-bottom:14px}
.about-logo{height:100px;width:auto;display:block;margin-bottom:22px}

/* ---------- 图文与配图 ---------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-bottom:44px}
.feature.reverse .feature-media{order:2}
.feature-media{margin:0}
.feature-media img{width:100%;height:auto;border-radius:var(--radius);box-shadow:var(--shadow);display:block}
.feature-text p{font-size:15.5px;color:var(--ink-2);line-height:1.95;margin-bottom:14px}
.feature-text .lead{font-size:17px;color:var(--ink);font-weight:600;line-height:1.85}
.img-note{display:block;margin-top:9px;font-size:12.5px;color:var(--ink-3)}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.scene-item figure{margin:0;overflow:hidden;border-radius:var(--radius-sm);background:var(--bg-tint)}
.scene-item img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;display:block;box-shadow:var(--shadow-sm);transition:transform .4s var(--ease)}
.scene-item:hover img{transform:scale(1.05)}
.scene-item h4{font-size:16px;margin-top:14px}
.scene-item p{font-size:14px;color:var(--ink-2);margin-top:6px}
.map-img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block;border-radius:var(--radius);box-shadow:var(--shadow);background:var(--bg-tint)}

/* ---------- 重点图书推荐 ---------- */
.book-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.book-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.book-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.book-cover{aspect-ratio:3/4;display:flex;flex-direction:column;justify-content:space-between;padding:26px 22px;color:#fff;position:relative}
.book-cover.c1{background:linear-gradient(160deg,#1F4E79,#163a59)}
.book-cover.c2{background:linear-gradient(160deg,#2C5E8F,#1F4E79)}
.book-cover.c3{background:linear-gradient(160deg,#3a7a86,#24505c)}
.book-cover .spine{position:absolute;left:0;top:0;bottom:0;width:8px;background:rgba(255,255,255,.18)}
.book-cover .kicker{font-size:12px;letter-spacing:1px;opacity:.82;position:relative;z-index:2}
.book-cover .ph{font-size:19px;font-weight:700;line-height:1.6}
.book-cover .ph small{display:block;font-size:13px;font-weight:400;opacity:.85;margin-top:8px}
.book-cover .todo{background:rgba(255,255,255,.16);color:#fff;border-left-color:#E0A93F}
.book-cover.c-cover{background:#0c0c0c}
.book-cover .cover-img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.book-body{padding:20px}
.book-body h3{font-size:17px;margin-bottom:10px}
.book-meta{font-size:13.5px;color:var(--ink-3);line-height:1.8}
.book-desc{font-size:14px;color:var(--ink-2);line-height:1.8;margin:12px 0 6px}
.book-body h3 .tag{display:inline-block;font-size:12px;font-weight:600;color:#241a05;background:var(--accent);padding:2px 9px;border-radius:20px;margin-left:5px;vertical-align:middle}
.book-dl{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 2px}
.book-dl .btn-dl{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:#fff;background:var(--brand);padding:10px 16px;border-radius:8px;text-decoration:none;transition:background .2s var(--ease),transform .2s var(--ease)}
.book-dl .btn-dl:hover{background:var(--brand-2);transform:translateY(-2px)}
.book-dl .btn-dl svg{width:15px;height:15px}
.book-intro{font-size:14px;color:var(--ink-2);line-height:1.85;margin:14px 0 4px}
.book-intro b{color:var(--ink)}
.book-toc{margin:16px 0 4px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.book-toc summary{cursor:pointer;padding:12px 16px;background:var(--bg-tint);font-weight:600;color:var(--ink);list-style:none}
.book-toc summary::-webkit-details-marker{display:none}
.book-toc summary::before{content:"▸ ";color:var(--accent)}
.book-toc[open] summary::before{content:"▾ "}
.book-toc .toc-inner{padding:12px 16px 16px}
.book-toc .toc-topic{font-weight:600;color:var(--brand);margin:12px 0 4px;font-size:14.5px}
.book-toc .toc-topic:first-child{margin-top:0}
.book-toc .toc-sec{font-size:13.5px;color:var(--ink-2);padding-left:16px;line-height:1.95}

/* ---------- 表单结果区 ---------- */
.result-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:14px}
.copy-toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%);z-index:60;background:var(--brand);color:#fff;padding:12px 22px;border-radius:10px;box-shadow:var(--shadow);font-size:15px;font-weight:600;max-width:calc(100vw - 32px);text-align:center}
.result-qr{display:flex;align-items:center;gap:18px;margin-top:20px;padding-top:18px;border-top:1px dashed var(--line);font-size:14px;color:var(--ink-2);line-height:1.8}

/* ---------- 新闻动态 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-thumb{background:var(--bg-tint);border-bottom:1px solid var(--line);overflow:hidden}
.news-thumb img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block;transition:transform .35s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:18px 20px}
.news-date{font-size:13px;color:var(--ink-3);margin-bottom:8px}
time.news-date{display:block}
.news-card h3{font-size:17px;margin-bottom:8px}
.news-card p{font-size:14px;color:var(--ink-2)}
.news-feature-wrap{margin-top:8px}
.news-feature{display:grid;grid-template-columns:1.05fr 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);margin-bottom:28px}
.news-feature-img{background:var(--bg-tint)}
.news-feature-img img{width:100%;height:100%;object-fit:cover;min-height:280px;display:block}
.news-feature-body{padding:26px 28px}
.news-feature-body h2{font-size:22px;margin:6px 0 14px;line-height:1.4}
.news-full{font-size:14.5px;color:var(--ink-2);line-height:1.9}
.news-full p{margin:0 0 12px}
.news-full h3{font-size:16px;color:var(--brand);margin:18px 0 8px}
.news-list{display:flex;flex-direction:column;gap:16px}
/* 首页「最新动态」整卡可点 */
a.news-item{text-decoration:none;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
a.news-item:hover{transform:translateY(-2px);border-color:#d3e0ec;box-shadow:var(--shadow)}
a.news-item:hover h3{color:var(--brand)}
.news-card2{scroll-margin-top:96px}
.news-item{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm)}
.news-item .ni-date{flex:none;width:86px;text-align:center;color:#8a6314;font-weight:700;font-size:15px;line-height:1.5;border-right:1px solid var(--line);padding-right:14px;align-self:flex-start}
.news-item .ni-thumb{flex:none;width:88px;height:60px;object-fit:cover;border-radius:8px;align-self:flex-start}
.news-item .ni-date small{display:block;color:var(--ink-3);font-weight:400;font-size:12px;margin-top:2px}
.news-item .ni-main{flex:1;min-width:0}
.news-item h3{font-size:17px;margin-bottom:6px;line-height:1.45}
.news-item .ni-excerpt{font-size:14px;color:var(--ink-2);line-height:1.7;margin:0 0 8px}
.news-item details.ni-detail{margin-top:4px}
.news-item details.ni-detail summary{cursor:pointer;color:var(--brand);font-size:14px;font-weight:600;list-style:none}
.news-item details.ni-detail summary::-webkit-details-marker{display:none}
.news-item details.ni-detail summary::before{content:"▸ ";color:var(--accent)}
.news-item details.ni-detail[open] summary::before{content:"▾ "}
.news-item .ni-full{font-size:14px;color:var(--ink-2);line-height:1.9;margin-top:10px}
.news-item .ni-full p{margin:0 0 10px}
.news-item .ni-src{margin-top:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.news-item .ni-src .more{margin-top:0}
.news-item .ni-from{font-size:13px;color:var(--ink-3)}
.more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);text-decoration:none}
.more svg{width:15px;height:15px;transition:transform .2s var(--ease)}
a.more:hover svg{transform:translateX(3px)}
.news-cat{margin-top:36px}
.news-cat:first-of-type{margin-top:18px}
.news-cat-title{font-size:20px;color:var(--brand);margin:0 0 16px;padding-left:13px;border-left:4px solid var(--accent);line-height:1.3}
.news-empty{padding:18px 20px;background:var(--bg-tint);border:1px dashed var(--line);border-radius:var(--radius);color:var(--ink-3);font-size:14px}
.news-grid2{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card2{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.news-card2[open]{box-shadow:var(--shadow)}
.news-card2>summary{list-style:none;cursor:pointer;display:block}
.news-card2>summary::-webkit-details-marker{display:none}
.news-card2 .nc2-thumb{background:var(--bg-tint);overflow:hidden}
.news-card2 .nc2-thumb img{width:100%;height:172px;object-fit:cover;display:block;transition:transform .35s var(--ease)}
.news-card2>summary:hover .nc2-thumb img{transform:scale(1.04)}
.news-card2 .nc2-body{padding:14px 16px}
.news-card2 .nc2-body .news-date{font-size:12.5px;color:var(--ink-3);margin-bottom:6px}
.news-card2 .nc2-body h3{font-size:16px;line-height:1.45;margin:0}
.news-card2 .nc2-full{padding:0 16px 16px;font-size:14px;color:var(--ink-2);line-height:1.85}
.news-card2 .nc2-full p{margin:0 0 10px}
.news-card2 .nc2-full h3.news-sub{font-size:15px;color:var(--brand);margin:14px 0 6px}
.news-card2 .nc2-full figure{margin:14px 0}
.news-card2 .nc2-full figure img{width:100%;height:auto;display:block;border-radius:8px}
.news-card2 .nc2-full figcaption{font-size:12.5px;color:var(--ink-3);text-align:center;margin-top:6px;line-height:1.6}
.news-card2 .nc2-full .news-fig-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.news-card2 .nc2-full .news-fig-pair figure{margin:0}
.news-card2 .ni-src{margin-top:8px}
/* 展开态：电脑端跨满整行，正文用舒适阅读宽度，缩略图不再被拉伸 */
.news-grid2>details.news-card2{max-width:440px}
.news-grid2>details.news-card2[open]{grid-column:1/-1;max-width:none}
.news-card2[open]>summary .nc2-thumb{display:none}
.news-card2[open]>summary .nc2-body,.news-card2[open] .nc2-full{max-width:860px;margin:0 auto}
.news-card2[open]>summary .nc2-body{padding:16px 20px}
.news-card2[open] .nc2-full{padding:0 20px 24px}
.news-card2 .nc2-full figure img{cursor:zoom-in}
/* 新闻图片满屏查看 */
.news-lightbox[hidden]{display:none}
.news-lightbox{position:fixed;inset:0;z-index:9999;background:rgba(10,16,26,.95);display:flex;align-items:center;justify-content:center;padding:56px 24px 68px}
.news-lightbox .lb-img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;box-shadow:0 12px 40px rgba(0,0,0,.55);border-radius:4px}
.news-lightbox .lb-close{position:absolute;top:14px;right:18px;width:40px;height:40px;border:0;border-radius:50%;background:rgba(255,255,255,.16);color:#fff;font-size:26px;line-height:1;cursor:pointer}
.news-lightbox .lb-close:hover{background:rgba(255,255,255,.3)}
.news-lightbox .lb-cap{position:absolute;left:16px;right:16px;bottom:18px;text-align:center;color:#e8edf4;font-size:14px;line-height:1.6}
/* 新闻列表页：紧凑文字列表（参考院校/行业站通行版式） */
.news-crumb{font-size:13px;color:var(--ink-3);margin:0 0 18px}
.news-crumb a{color:var(--ink-2)}
.news-crumb a:hover{color:var(--brand)}
.news-list-head{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:0 0 22px}
.news-list-title{font-size:28px;color:var(--brand);margin:0;flex:1;text-align:center}
.news-search{display:flex;flex:none}
.news-search input{width:220px;padding:9px 12px;border:1px solid var(--line);border-right:0;border-radius:6px 0 0 6px;font-size:14px;outline:none;background:#fff}
.news-search input:focus{border-color:var(--brand)}
.news-search button{padding:9px 18px;border:0;border-radius:0 6px 6px 0;background:var(--brand);color:#fff;font-size:14px;cursor:pointer}
.news-group{margin:0 0 30px}
.news-group:last-of-type{margin-bottom:12px}
.news-rows{border-top:1px solid var(--line)}
.news-row{display:flex;align-items:baseline;gap:12px;padding:15px 16px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);transition:background .15s var(--ease)}
.news-row:nth-child(even){background:var(--bg-tint)}
.news-row:hover{background:#eaf2fa}
.news-row:hover .nr-title{color:var(--brand)}
.news-row[hidden]{display:none}
.nr-mark{flex:none;color:var(--accent);font-size:15px}
.nr-title{flex:1;min-width:0;font-size:15px;line-height:1.65}
.nr-cat{flex:none;font-size:12px;color:var(--ink-3);border:1px solid var(--line);border-radius:4px;padding:1px 7px;white-space:nowrap}
.nr-date{flex:none;font-size:13px;color:var(--ink-3);white-space:nowrap;font-variant-numeric:tabular-nums}
.news-empty{text-align:center;color:var(--ink-3);padding:28px 0}
.news-group-none{margin:0;padding:15px 16px;font-size:14px;color:var(--ink-3)}
/* 新闻独立页 */
.article-shell{max-width:900px;margin:0 auto}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);margin:0 0 16px}
.article-card{max-width:900px;margin:0 auto}
.article-card .nc2-full{padding:24px 28px 30px;font-size:15px;line-height:1.95}
.article-card .nc2-full figure img{cursor:zoom-in}
.article-back{text-align:center;margin:26px 0 0}
@media(max-width:600px){
  .news-list-title{font-size:23px;text-align:left;flex:1 1 100%}
  .news-search{width:100%}
  .news-search input{flex:1;width:auto}
  .news-row{flex-wrap:wrap;gap:6px 10px;padding:13px 12px}
  .nr-title{flex:1 1 calc(100% - 26px);font-size:14px}
  .nr-cat,.nr-date{margin-left:22px}
  .article-card .nc2-full{padding:18px 16px 24px}
}
@media(max-width:920px){.news-grid2{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.news-grid2{grid-template-columns:1fr}.news-card2 .nc2-full .news-fig-pair{grid-template-columns:1fr}}
.company-news{display:grid;grid-template-columns:1.7fr 1fr;gap:22px;align-items:start}
.cn-scroll{display:flex;gap:14px;overflow-x:auto;padding-bottom:10px;scroll-snap-type:x mandatory}
.cn-scroll::-webkit-scrollbar{height:8px}
.cn-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:8px}
.cn-slide{flex:0 0 240px;scroll-snap-align:start;position:relative;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;text-decoration:none;box-shadow:var(--shadow-sm)}
.cn-slide img{width:100%;height:150px;object-fit:cover;display:block}
.cn-slide span{display:block;padding:10px 12px;font-size:14px;color:var(--ink);font-weight:600;line-height:1.4}
.cn-list{list-style:none;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:6px 0}
.cn-list li{border-bottom:1px dashed var(--line)}
.cn-list li:last-child{border-bottom:none}
.cn-list a{display:block;padding:12px 16px;color:var(--ink-2);text-decoration:none;font-size:14.5px;line-height:1.4}
.cn-list a:hover{color:var(--brand);background:var(--bg-tint)}
@media(max-width:760px){.company-news{grid-template-columns:1fr}}
@media(max-width:720px){.news-feature{grid-template-columns:1fr}.news-feature-img img{min-height:200px}}
@media(max-width:920px){.news-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.news-grid{grid-template-columns:1fr}}

/* ---------- 滚动入场动画（仅 JS 可用时启用淡入；禁用 JS 时正文直接可见） ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 404 ---------- */
.err404{text-align:center;padding:90px 0}
.err404 .code{font-size:88px;font-weight:800;color:var(--brand);line-height:1}
.err404 .sec-desc{margin:14px auto 26px}
.err404-search{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:560px;margin:28px auto 0}
.err404-search input{flex:1 1 260px;min-width:0;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.err404-hint{margin-top:10px;font-size:13px;color:var(--ink-3)}

/* ---------- 响应式 ---------- */
@media (max-width:920px){
  .hero .wrap{grid-template-columns:1fr;gap:32px;padding:56px 22px 60px}
  .hero h1{font-size:30px}
  .cards{grid-template-columns:1fr 1fr}
  .trust{grid-template-columns:1fr 1fr}
  .cols{grid-template-columns:1fr;gap:28px}
  .feature{grid-template-columns:1fr;gap:26px}
  .feature.reverse .feature-media{order:0}
  .scene-grid{grid-template-columns:1fr 1fr}
  .book-grid{grid-template-columns:1fr 1fr}
  .site-nav{gap:18px}
  .site-nav a{font-size:14px}
  .bk-filter-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 16px}
}
@media (max-width:760px){
  .nav-toggle{display:inline-flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:8px 22px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);
    max-height:0;overflow:hidden;visibility:hidden;transition:max-height .28s var(--ease),visibility .28s;}
  .site-nav.open{max-height:420px;visibility:visible}
  .site-nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .site-nav a::after{display:none}
  .site-nav .nav-tel{border-bottom:none;padding-top:14px}
  .header-inner{position:relative}
  .brand-logo{height:42px}
  .about-logo{height:72px}
  section{padding:54px 0}
  .sec-title{font-size:24px}
  .page-head .sec-title{font-size:26px}
  .cards,.trust{grid-template-columns:1fr}
  .book-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 26px;flex-direction:column;align-items:flex-start}
  .pub-grid a{width:118px;height:52px}
  .tbl{table-layout:fixed;word-break:break-word}
  .tbl th{width:110px;white-space:normal}
  .tbl td{overflow-wrap:anywhere}
  .footer-bottom{flex-direction:column}
  .bk-filter{padding:18px}
  .bk-filter-row{grid-template-columns:1fr;gap:14px}
  .bk-toolbar{align-items:flex-start}
  .bk-toolbar > div{width:100%}
  .bk-item{padding:15px 16px}
  .bk-pager .btn-sm{padding:8px 12px;min-width:40px}
}

/* ---------- 重点图书：封面网格 + 点击看详情 ---------- */
/* 修正：三列基线由 :234 定义，此处只调间距，不再重新声明 grid-template-columns，
   否则会覆盖 :374(≤920 双列) / :392(≤760 单列) 的响应式列数 */
.book-grid{gap:26px}
.book-tile{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:16px;display:flex;flex-direction:column;text-align:center;transition:transform .18s var(--ease),box-shadow .22s var(--ease)}
.book-tile:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.tile-cover{display:block;width:100%;border:0;background:none;padding:0;margin:0;cursor:pointer}
.tile-cover .cover-frame{display:block;width:100%;aspect-ratio:3/4;background:var(--bg-tint);border-radius:8px;overflow:hidden}
.tile-cover img{width:100%;height:100%;object-fit:cover;display:block}
.book-tile h3{font-size:16px;line-height:1.45;margin:14px 4px 0}
.book-tile h3 .tag{display:inline-block;font-size:11.5px;font-weight:600;color:#241a05;background:var(--accent);padding:2px 8px;border-radius:20px;margin-left:4px;vertical-align:middle}
.tile-intro{font-size:13.5px;color:var(--ink-2);line-height:1.7;margin:10px 2px 0;flex:1}
.tile-more{margin-top:14px;align-self:center;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);background:var(--bg-tint);border:1px solid var(--line);padding:9px 18px;border-radius:8px;cursor:pointer;transition:background .2s var(--ease)}
.tile-more:hover{background:#eef3f9}
/* 详情弹窗 */
.modal{position:fixed;inset:0;background:rgba(13,27,45,.55);display:none;align-items:flex-start;justify-content:center;padding:48px 16px;z-index:1000;overflow-y:auto}
.modal.open{display:block}
.modal-card{background:#fff;border-radius:var(--radius);max-width:780px;width:100%;margin:0 auto;padding:30px 30px 34px;position:relative;box-shadow:var(--shadow)}
.modal-close{position:absolute;top:14px;right:14px;width:38px;height:38px;border:0;background:var(--bg-tint);border-radius:50%;font-size:20px;color:var(--ink-2);cursor:pointer;line-height:1;transition:background .2s}
.modal-close:hover{background:#e3e9f0}
.modal-grid{display:grid;grid-template-columns:240px 1fr;gap:26px;align-items:start}
.modal-cover{width:100%;border-radius:8px;box-shadow:var(--shadow-sm);display:block;background:var(--bg-tint)}
.modal-body h2{font-size:20px;margin-bottom:6px;line-height:1.4}
@media(max-width:680px){
  .book-grid{gap:16px}
  .modal-grid{grid-template-columns:1fr;gap:16px}
  .modal-cover{max-width:200px;margin:0 auto}
  .modal-card{padding:24px 18px 28px}
}

/* ---------- 教材查找区（全部复用既有变量，无新增色值/变量/断点） ---------- */
[hidden]{display:none!important}
.bk-filter{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.bk-filter-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px 20px}
.bk-filter .field{margin-bottom:0;min-width:0}
.bk-filter > p{margin-top:16px;font-size:13px;color:var(--ink-3);line-height:1.8}
.bk-combo{position:relative}
.bk-combo > input{cursor:pointer}
.bk-combo-list{position:absolute;z-index:30;top:100%;left:0;right:0;margin-top:6px;max-height:264px;overflow-y:auto;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px}
.bk-combo-list > div[role="presentation"]{font-size:12px;font-weight:700;color:var(--ink-3);padding:8px 10px 4px;border-top:1px dashed var(--line);margin-top:6px}
.bk-combo-list > div[role="presentation"]:first-child{border-top:0;margin-top:0}
.bk-combo-opt{display:block;width:100%;text-align:left;border:0;background:none;font-family:inherit;font-size:14px;color:var(--ink-2);padding:8px 10px;border-radius:6px;cursor:pointer;line-height:1.5}
.bk-combo-opt:hover,.bk-combo-opt[data-active="true"]{background:var(--bg-tint);color:var(--brand)}
.bk-toolbar{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:26px 0 14px;scroll-margin-top:88px}
.bk-toolbar > p{font-size:15px;font-weight:600;color:var(--ink-2)}
.bk-toolbar > div{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap}
.bk-toolbar .field{margin-bottom:0;min-width:150px}
.bk-toolbar .field label{font-size:13px}
.bk-status{margin-bottom:16px}
.bk-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 20px;margin-bottom:14px;box-shadow:var(--shadow-sm)}
.bk-item h3{font-size:16.5px;line-height:1.5;margin-bottom:10px;overflow-wrap:anywhere}
.bk-item .tag{display:inline-block;font-size:11.5px;font-weight:600;color:#241a05;background:var(--accent);padding:2px 8px;border-radius:20px;margin:0 4px 0 0;vertical-align:middle}
.bk-item .book-meta{font-size:13.5px;line-height:1.9;margin:0 0 8px;overflow-wrap:anywhere}
.bk-item p:last-child{margin:10px 0 0}
.bk-pager{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:22px}
.bk-pager > span{font-size:13px;color:var(--ink-3);margin-left:4px}