/* 书房云 - 营销站样式 */
:root{--red:#c6100f;--dark:#1a1a2e;--gray:#f5f5f7;--text:#333;--text2:#666}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Helvetica Neue','Microsoft YaHei',sans-serif;color:var(--text);line-height:1.8;font-size:15px}
a{color:var(--red);text-decoration:none}
img{max-width:100%;height:auto}

/* Header */
.header{background:#fff;border-bottom:1px solid #eee;position:sticky;top:0;z-index:100}
.header-inner{max-width:1100px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:20px;font-weight:700;color:var(--dark);display:flex;align-items:center;gap:6px}
.logo span{color:var(--red)}
.nav{display:flex;gap:24px;font-size:14px}
.nav a{color:var(--text2);transition:color .2s}
.nav a:hover,.nav a.active{color:var(--red)}
.nav-cta{background:var(--red);color:#fff!important;padding:6px 18px;border-radius:20px;font-size:13px;display:inline-block}

/* Hero */
.hero{background:linear-gradient(135deg,#1a1a2e 0%,#c6100f 100%);color:#fff;padding:80px 24px 70px;text-align:center}
.hero h1{font-size:38px;font-weight:700;margin-bottom:16px;line-height:1.3}
.hero p{font-size:17px;opacity:.9;max-width:650px;margin:0 auto 32px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 32px;border-radius:30px;font-size:15px;font-weight:600;transition:all .2s;cursor:pointer}
.btn-primary{background:#fff;color:var(--red)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.15)}
.btn-outline{border:2px solid rgba(255,255,255,.6);color:#fff}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:40px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat .num{font-size:32px;font-weight:700}
.hero-stat .label{font-size:13px;opacity:.7;margin-top:2px}

/* Sections */
.section{padding:60px 24px;max-width:1100px;margin:0 auto}
.section-title{font-size:26px;font-weight:700;text-align:center;margin-bottom:40px;color:var(--dark)}
.section-title:after{content:'';display:block;width:50px;height:3px;background:var(--red);margin:12px auto 0;border-radius:2px}

/* Features grid */
.features-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:768px){.features-grid{grid-template-columns:1fr}}
.feat-card{background:var(--gray);border-radius:14px;padding:28px;transition:transform .2s}
.feat-card:hover{transform:translateY(-3px)}
.feat-card .icon{font-size:32px;margin-bottom:10px}
.feat-card h3{font-size:17px;margin-bottom:8px;color:var(--dark)}
.feat-card p{font-size:14px;color:var(--text2);line-height:1.7}

/* Case study */
.case-section{background:var(--gray);padding:60px 24px}
.case-inner{max-width:800px;margin:0 auto;background:#fff;border-radius:14px;padding:36px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.case-inner h3{font-size:18px;color:var(--dark);margin-bottom:12px}
.case-inner .tag{display:inline-block;background:#fdf0f0;color:var(--red);font-size:12px;padding:2px 10px;border-radius:10px;margin-bottom:12px}
.case-inner p{font-size:14px;color:var(--text2);margin-bottom:10px;line-height:1.8}
.case-inner .data-row{display:flex;gap:20px;margin:16px 0;flex-wrap:wrap}
.case-inner .data-item{background:var(--gray);padding:14px 20px;border-radius:10px;flex:1;min-width:100px;text-align:center}
.case-inner .data-item .v{font-size:22px;font-weight:700;color:var(--red)}
.case-inner .data-item .l{font-size:12px;color:var(--text2);margin-top:2px}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}
@media(max-width:768px){.pricing-grid{grid-template-columns:1fr}}
.price-card{background:#fff;border:1px solid #eee;border-radius:14px;padding:28px;text-align:center;transition:all .2s}
.price-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.price-card.featured{border:2px solid var(--red);position:relative}
.price-card.featured:before{content:'推荐';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;font-size:11px;padding:2px 14px;border-radius:8px}
.price-card h3{font-size:17px;color:var(--dark);margin-bottom:6px}
.price-card .price{font-size:32px;font-weight:700;color:var(--red);margin:10px 0}
.price-card .price span{font-size:14px;color:var(--text2);font-weight:400}
.price-card ul{list-style:none;text-align:left;margin:16px 0;font-size:13px;color:var(--text2);line-height:2.2}
.price-card ul li:before{content:'✓ ';color:var(--red);font-weight:700}
.price-card .btn{margin-top:8px}

/* CTA */
.cta-section{background:linear-gradient(135deg,#c6100f,#e06060);color:#fff;text-align:center;padding:60px 24px}
.cta-section h2{font-size:28px;margin-bottom:12px}
.cta-section p{font-size:15px;opacity:.9;margin-bottom:24px}
.cta-section .btn-primary{background:#fff;color:var(--red);font-size:16px;padding:14px 40px}

/* Footer */
.footer{background:var(--dark);color:rgba(255,255,255,.6);padding:40px 24px;text-align:center;font-size:13px}
.footer a{color:rgba(255,255,255,.8)}
.footer .links{display:flex;gap:20px;justify-content:center;margin-bottom:16px;flex-wrap:wrap}

/* Blog list */
.blog-list{max-width:800px;margin:0 auto}
.blog-item{padding:20px 0;border-bottom:1px solid #eee}
.blog-item:first-child{padding-top:0}
.blog-item h3{font-size:17px;margin-bottom:6px}
.blog-item h3 a{color:var(--dark)}
.blog-item h3 a:hover{color:var(--red)}
.blog-item .meta{font-size:13px;color:#999;margin-bottom:6px}
.blog-item p{font-size:14px;color:var(--text2);line-height:1.7}

/* Blog article */
.article{max-width:780px;margin:0 auto;padding:40px 24px}
.article h1{font-size:26px;margin-bottom:12px;color:var(--dark);line-height:1.4}
.article .meta{font-size:13px;color:#999;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #eee}
.article p{margin-bottom:16px;font-size:15px;line-height:1.9;color:#444}
.article h2{font-size:20px;margin:28px 0 12px;color:var(--dark)}
.article h3{font-size:17px;margin:20px 0 8px;color:var(--dark)}
.article ul,.article ol{padding-left:20px;margin-bottom:16px;font-size:15px;color:#444;line-height:1.8}
.article li{margin-bottom:6px}
.article blockquote{border-left:3px solid var(--red);padding:12px 20px;margin:16px 0;background:var(--gray);border-radius:0 8px 8px 0;font-size:14px;color:#555}

/* Features page */
.feature-detail{margin-bottom:40px;padding:32px;background:var(--gray);border-radius:14px}
.feature-detail h2{font-size:20px;margin-bottom:10px;color:var(--dark)}
.feature-detail p{font-size:14px;color:var(--text2);line-height:1.8}
.feature-detail .sub-features{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}
@media(max-width:768px){.feature-detail .sub-features{grid-template-columns:1fr}}
.feature-detail .sub-feat{background:#fff;border-radius:10px;padding:14px 16px;font-size:13px;color:var(--text2)}
.feature-detail .sub-feat strong{color:var(--dark);display:block;margin-bottom:4px}

/* Contact */
.contact-wrap{max-width:600px;margin:0 auto;text-align:center}
.contact-wrap p{font-size:15px;color:var(--text2);margin-bottom:8px}
.contact-wrap .methods{margin:24px 0}
.contact-wrap .methods .m{display:inline-block;margin:8px;padding:16px 24px;background:var(--gray);border-radius:12px;font-size:14px}
.contact-wrap .methods .m .l{color:var(--text2);font-size:12px}
.contact-wrap .methods .m .v{color:var(--dark);font-weight:600;font-size:15px;margin-top:2px}