/* shoulm.com - 企业官网风格 */
:root {
    --primary: #c8102e;
    --primary-dark: #9e0b23;
    --primary-light: #e63946;
    --dark: #1a1a1a;
    --dark-light: #2d2d2d;
    --text: #333333;
    --text-light: #666666;
    --bg: #ffffff;
    --bg-light: #f8f9fa;
    --border: #e9ecef;
    --shadow: 0 5px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 15px 40px rgba(200,16,46,0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif; color: var(--text); line-height: 1.6; background: var(--bg); }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }
.container { max-width: 1400px; margin: 0 auto; padding: 0 30px; }

/* 顶部导航 */
.header { background: var(--dark); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.2); }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo img { height: 45px; }
.logo-text h1 { font-size: 18px; color: #fff; font-weight: 600; white-space: nowrap; }
.logo-text p { font-size: 11px; color: rgba(255,255,255,0.6); white-space: nowrap; }
.nav-menu { display: flex; gap: 25px; list-style: none; align-items: center; flex-shrink: 0; }
.nav-menu a { font-size: 14px; font-weight: 500; color: #fff; transition: color 0.3s; white-space: nowrap; }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary-light); }
.nav-phone { background: var(--primary); color: #fff; padding: 10px 20px; font-weight: 600; font-size: 14px; white-space: nowrap; flex-shrink: 0; }
.nav-phone:hover { background: var(--primary-dark); }

/* 下拉菜单 */
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); background: #fff; min-width: 180px; box-shadow: 0 10px 30px rgba(0,0,0,0.15); padding: 8px 0; z-index: 1000; border-radius: 4px; }
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 12px 20px; font-size: 14px; white-space: nowrap; color: var(--text); }
.dropdown-menu a:hover { background: var(--bg-light); color: var(--primary); }
.dropdown > a::after { content: " ▾"; font-size: 10px; opacity: 0.7; }

/* Banner */
.banner { background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%); color: #fff; padding: 150px 0 100px; text-align: center; margin-top: 70px; position: relative; overflow: hidden; }
.banner::before { content: ""; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(200,16,46,0.05)"/></svg>'); background-size: 500px; }
.banner h2 { font-size: 48px; margin-bottom: 20px; font-weight: 700; letter-spacing: 2px; position: relative; }
.banner p { font-size: 18px; opacity: 0.85; margin-bottom: 35px; letter-spacing: 1px; position: relative; }
.banner .btn { display: inline-block; background: var(--primary); color: #fff; padding: 16px 45px; font-size: 16px; font-weight: 600; transition: all 0.3s; position: relative; }
.banner .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 25px rgba(200,16,46,0.3); }

/* 通用区块 */
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 32px; color: var(--dark); margin-bottom: 12px; font-weight: 700; }
.section-title p { color: var(--text-light); font-size: 15px; }
.section-title::after { content: ""; display: block; width: 50px; height: 3px; background: var(--primary); margin: 18px auto 0; }

/* 服务卡片 */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 25px; }
.service-card { background: #fff; padding: 35px 25px; text-align: center; box-shadow: var(--shadow); transition: all 0.3s; display: block; border-radius: 8px; }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.service-card .icon { font-size: 52px; margin-bottom: 18px; }
.service-card h3 { font-size: 18px; color: var(--dark); margin-bottom: 12px; font-weight: 600; }
.service-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* 优势区块 */
.advantages { background: var(--bg-light); }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.adv-item { text-align: center; padding: 25px; background: #fff; border-radius: 8px; box-shadow: var(--shadow); }
.adv-item .num { font-size: 42px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.adv-item h3 { font-size: 16px; margin-bottom: 8px; color: var(--dark); }
.adv-item p { color: var(--text-light); font-size: 13px; line-height: 1.6; }

/* 流程步骤 */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.step { text-align: center; position: relative; }
.step-num { width: 65px; height: 65px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 700; margin: 0 auto 18px; border-radius: 50%; box-shadow: 0 5px 15px rgba(200,16,46,0.3); }
.step h4 { font-size: 17px; margin-bottom: 8px; color: var(--dark); }
.step p { font-size: 14px; color: var(--text-light); }

/* 联系表单 */
.contact-box { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info h3 { font-size: 26px; color: var(--dark); margin-bottom: 20px; }
.contact-info p { margin-bottom: 15px; font-size: 15px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; color: var(--dark); font-size: 14px; }
.form-group input, .form-group textarea { width: 100%; padding: 12px 15px; border: 1px solid var(--border); border-radius: 4px; font-size: 14px; transition: border-color 0.3s; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group textarea { height: 130px; resize: vertical; }
.btn-submit { background: var(--primary); color: #fff; padding: 14px 45px; border: none; font-size: 15px; cursor: pointer; font-weight: 600; border-radius: 4px; transition: all 0.3s; }
.btn-submit:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 5px 15px rgba(200,16,46,0.3); }

/* 页脚 */
.footer { background: var(--dark); color: #fff; padding: 50px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 35px; }
.footer h4 { font-size: 16px; margin-bottom: 18px; color: #fff; font-weight: 600; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; opacity: 0.7; font-size: 13px; }
.footer ul li a:hover { opacity: 1; color: var(--primary-light); }
.copyright { text-align: center; padding-top: 25px; border-top: 1px solid rgba(255,255,255,0.1); opacity: 0.5; font-size: 13px; }
.copyright a { color: #fff; }

/* 内页通用 */
.page-banner { background: linear-gradient(135deg, var(--dark), var(--dark-light)); color: #fff; padding: 100px 0 50px; margin-top: 70px; text-align: center; }
.page-banner h2 { font-size: 36px; margin-bottom: 12px; font-weight: 700; }
.page-banner p { opacity: 0.85; font-size: 15px; }
.content-section { padding: 60px 0; }
.content-section h3 { font-size: 22px; color: var(--dark); margin: 35px 0 18px; padding-left: 15px; border-left: 4px solid var(--primary); font-weight: 600; }
.content-section p { margin-bottom: 15px; color: var(--text); line-height: 1.8; font-size: 15px; }
.content-section ul { margin: 18px 0 18px 25px; }
.content-section ul li { margin-bottom: 8px; line-height: 1.7; }

/* FAQ */
.faq-item { border: 1px solid var(--border); margin-bottom: 12px; border-radius: 6px; overflow: hidden; }
.faq-q { background: var(--bg-light); padding: 18px 22px; font-weight: 600; cursor: pointer; color: var(--dark); font-size: 15px; }
.faq-a { padding: 18px 22px; display: none; line-height: 1.8; font-size: 14px; color: var(--text-light); }
.faq-item.open .faq-a { display: block; }

/* 热点资讯 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.news-card { background: #fff; overflow: hidden; box-shadow: var(--shadow); border-radius: 8px; transition: all 0.3s; }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.news-card .img { height: 180px; background: linear-gradient(135deg, var(--primary-light), var(--primary)); }
.news-card .content { padding: 22px; }
.news-card h4 { font-size: 16px; margin-bottom: 10px; color: var(--dark); font-weight: 600; }
.news-card .date { font-size: 12px; color: var(--text-light); }

/* 响应式 */
@media (max-width: 1200px) {
    .nav-menu { gap: 18px; }
    .nav-menu a { font-size: 13px; }
    .container { padding: 0 25px; }
}
@media (max-width: 992px) {
    .nav-menu { display: none; }
    .banner h2 { font-size: 32px; }
    .adv-grid, .process-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .banner h2 { font-size: 26px; }
    .banner { padding: 120px 0 70px; }
    .service-grid, .adv-grid, .process-steps, .news-grid { grid-template-columns: 1fr; }
    .contact-box { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .container { padding: 0 15px; }
    .section { padding: 60px 0; }
    .section-title h2 { font-size: 26px; }
    .page-banner h2 { font-size: 28px; }
}