/* ============================================================
   百度网盘资讯站 · 全局样式
   主色：百度蓝 #3150FF / 渐变紫蓝
   ============================================================ */
:root{
  --blue:#3150ff;
  --blue-deep:#1e2fc7;
  --purple:#7b2ff2;
  --cyan:#12b8f0;
  --green:#14c56a;
  --orange:#ff8a00;
  --red:#ff4d4f;
  --ink:#1a2233;
  --ink-soft:#4a5568;
  --bg:#f5f7ff;
  --card:#ffffff;
  --line:#e6eaf7;
  --grad-hero:linear-gradient(135deg,#3150ff 0%,#7b2ff2 55%,#12b8f0 100%);
  --grad-cta:linear-gradient(90deg,#3150ff,#7b2ff2);
  --radius:18px;
  --shadow:0 10px 30px rgba(49,80,255,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-deep)}
img{max-width:100%;height:auto;display:block}
ul,ol{padding-left:1.4em}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.brand img{width:34px;height:34px;border-radius:8px}
.brand b{background:var(--grad-cta);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-links a{padding:8px 14px;border-radius:10px;font-weight:600;font-size:15px;color:var(--ink-soft)}
.nav-links a:hover,.nav-links a.active{background:#eef1ff;color:var(--blue)}
.nav-cta{background:var(--grad-cta);color:#fff!important;border-radius:999px!important;padding:9px 20px!important;box-shadow:0 6px 16px rgba(49,80,255,.3)}

/* ---------- 首屏 Hero ---------- */
.hero{background:var(--grad-hero);color:#fff;padding:70px 0 90px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.08)}
.hero::before{content:"";position:absolute;left:-60px;bottom:-100px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.06)}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;position:relative;z-index:2}
.hero h1{font-size:42px;line-height:1.25;margin-bottom:18px;letter-spacing:.5px}
.hero p.lead{font-size:18px;opacity:.94;margin-bottom:26px;max-width:600px}
.hero-meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.hero-meta span{background:rgba(255,255,255,.16);padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:12px;font-weight:700;font-size:16px;border:0;cursor:pointer}
.btn-light{background:#fff;color:var(--blue-deep)}
.btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.4)}
.hero-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:20px;padding:28px;backdrop-filter:blur(6px)}
.hero-card h3{font-size:18px;margin-bottom:14px}
.stat-row{display:flex;justify-content:space-between;text-align:center;margin-top:18px}
.stat-row .num{font-size:26px;font-weight:800}
.stat-row .lab{font-size:12px;opacity:.85}

/* ---------- 区块标题 ---------- */
.section{padding:60px 0}
.section-head{text-align:center;margin-bottom:40px}
.section-head .kicker{display:inline-block;background:#eef1ff;color:var(--blue);padding:6px 16px;border-radius:999px;font-size:13px;font-weight:700;margin-bottom:12px}
.section-head h2{font-size:32px;margin-bottom:10px}
.section-head p{color:var(--ink-soft);max-width:680px;margin:0 auto}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid var(--line)}
.card .icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--ink-soft);font-size:15px}
.card a.more{display:inline-block;margin-top:14px;font-weight:700;font-size:14px}
.card a.more::after{content:" →"}

/* 彩色图标背景 */
.bg-blue{background:linear-gradient(135deg,#3150ff,#12b8f0)}
.bg-purple{background:linear-gradient(135deg,#7b2ff2,#b06bff)}
.bg-green{background:linear-gradient(135deg,#14c56a,#4ce69a)}
.bg-orange{background:linear-gradient(135deg,#ff8a00,#ffb45c)}
.bg-red{background:linear-gradient(135deg,#ff4d4f,#ff8a8a)}
.bg-cyan{background:linear-gradient(135deg,#12b8f0,#4ce0ff)}

/* ---------- FAQ ---------- */
.faq-cat{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.faq-item{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);padding:22px;box-shadow:var(--shadow);transition:transform .2s}
.faq-item:hover{transform:translateY(-4px)}
.faq-item .tag{display:inline-block;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;color:#fff;margin-bottom:12px}
.faq-item h3{font-size:17px;margin-bottom:8px}
.faq-item h3 a{color:var(--ink)}
.faq-item p{color:var(--ink-soft);font-size:14px}
.faq-item .steps{font-size:13px;color:var(--ink-soft);margin-top:10px}
.faq-item .steps b{color:var(--blue)}

/* 问答详情列表 */
.qa-block{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;margin-bottom:22px;box-shadow:var(--shadow)}
.qa-block h2{font-size:22px;margin-bottom:14px;color:var(--ink)}
.qa-block h2 .q{color:var(--blue);margin-right:8px}
.qa-block ol{margin:14px 0;padding-left:1.4em}
.qa-block ol li{margin-bottom:10px;color:var(--ink)}
.qa-block .concl{background:#f0f4ff;border-left:4px solid var(--blue);padding:12px 16px;border-radius:8px;font-size:15px;color:var(--ink-soft)}

/* ---------- 新闻 ---------- */
.news-list{display:flex;flex-direction:column;gap:20px}
.news-item{display:grid;grid-template-columns:220px 1fr;gap:22px;background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:18px;box-shadow:var(--shadow)}
.news-item img{width:220px;height:140px;object-fit:cover;border-radius:12px}
.news-item .cat{font-size:12px;font-weight:700;color:var(--blue);background:#eef1ff;padding:3px 10px;border-radius:999px}
.news-item h3{margin:8px 0;font-size:19px}
.news-item h3 a{color:var(--ink)}
.news-item .date{font-size:13px;color:var(--ink-soft)}
.news-item p{color:var(--ink-soft);font-size:14px;margin-top:6px}

/* ---------- 文章详情 ---------- */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:30px}
.article-body{background:#fff;border-radius:var(--radius);padding:36px;box-shadow:var(--shadow);border:1px solid var(--line)}
.article-body h1{font-size:30px;line-height:1.4;margin-bottom:16px}
.article-meta{display:flex;gap:14px;flex-wrap:wrap;align-items:center;font-size:14px;color:var(--ink-soft);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:22px}
.article-meta .cat{color:var(--blue);font-weight:700}
.article-body h2{font-size:22px;margin:28px 0 12px;padding-left:12px;border-left:4px solid var(--blue)}
.article-body p{margin-bottom:16px;color:#2d3748;font-size:16px}
.article-body figure{margin:20px 0}
.article-body figcaption{font-size:13px;color:var(--ink-soft);text-align:center;margin-top:6px}
.article-body img{border-radius:14px}
.article-body .lead-para{font-size:17px;color:#1a2233;background:#f0f4ff;padding:16px 20px;border-radius:12px;border-left:4px solid var(--purple)}

/* 评论 */
.comments{margin-top:34px}
.comments h2{font-size:20px;margin-bottom:18px}
.comment{display:flex;gap:14px;background:#f7f9ff;border-radius:12px;padding:16px;margin-bottom:14px}
.comment .avatar{width:44px;height:44px;border-radius:50%;background:var(--grad-cta);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0}
.comment .c-head{font-size:14px;font-weight:700}
.comment .c-time{font-size:12px;color:var(--ink-soft);margin-left:8px}
.comment p{font-size:14px;color:var(--ink-soft);margin:6px 0 0}
.comment .c-like{font-size:12px;color:var(--green);font-weight:700}

/* 侧栏 */
.side-widget{background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:22px;box-shadow:var(--shadow);margin-bottom:22px}
.side-widget h3{font-size:17px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid #eef1ff}
.side-widget ul{list-style:none;padding:0}
.side-widget ul li{margin-bottom:11px}
.side-widget ul li a{font-size:14px;color:var(--ink-soft);line-height:1.5}
.side-widget ul li a:hover{color:var(--blue)}
.side-widget .hot-num{display:inline-block;width:20px;height:20px;line-height:20px;text-align:center;border-radius:6px;font-size:12px;font-weight:800;color:#fff;margin-right:8px}
.cat-list a{display:block;padding:9px 12px;border-radius:9px;font-size:14px;color:var(--ink-soft);margin-bottom:6px}
.cat-list a:hover{background:#eef1ff;color:var(--blue)}

/* 上一篇/下一篇 + 相关阅读 */
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:30px}
.pager a{flex:1;background:#f7f9ff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;font-size:14px;color:var(--ink-soft)}
.pager a b{display:block;color:var(--blue);font-size:13px;margin-bottom:4px}
.related{margin-top:30px}
.related .grid-3 .card{padding:0;overflow:hidden}
.related .grid-3 .card img{height:130px;width:100%;object-fit:cover}
.related .grid-3 .card .pad{padding:16px}
.related .grid-3 .card h3{font-size:15px}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:var(--ink-soft);padding:16px 0;margin-bottom:10px}
.breadcrumb a{color:var(--ink-soft)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb span{color:var(--blue);font-weight:600}

/* ---------- 页脚 ---------- */
.footer{background:#12182b;color:#aab2c8;padding:50px 0 30px;margin-top:60px}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.footer ul{list-style:none;padding:0}
.footer ul li{margin-bottom:9px}
.footer ul li a{color:#aab2c8;font-size:14px}
.footer ul li a:hover{color:#fff}
.footer .brand-line{color:#fff;font-weight:800;font-size:18px;margin-bottom:10px}
.footer .brand-line b{background:var(--grad-cta);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.footer .copyright{border-top:1px solid #232a44;padding-top:20px;font-size:13px;text-align:center;color:#7c86a3}
.footer .sitemap-link{color:#ffb45c;font-weight:700}

/* ---------- 下载页 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:28px;text-align:center;box-shadow:var(--shadow)}
.dl-card .d-icon{font-size:46px;margin-bottom:14px}
.dl-card h3{font-size:20px;margin-bottom:8px}
.dl-card p{color:var(--ink-soft);font-size:14px;margin-bottom:18px}
.dl-card .btn{width:100%}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .hero-grid,.article-layout{grid-template-columns:1fr}
  .grid-3,.grid-2,.faq-cat,.dl-grid,.footer .cols{grid-template-columns:1fr 1fr}
  .news-item{grid-template-columns:1fr}
  .news-item img{width:100%;height:180px}
  .hero h1{font-size:32px}
}
@media(max-width:600px){
  .grid-3,.grid-2,.faq-cat,.dl-grid,.footer .cols{grid-template-columns:1fr}
  .nav{flex-wrap:wrap;height:auto;padding:12px 0}
  .nav-links a{padding:6px 10px;font-size:13px}
  .hero{padding:44px 0 60px}
  .section{padding:40px 0}
}