/* ===== 与峰出海 全局样式 ===== */
:root {
    --primary: #FF6B35;
    --primary-dark: #E55A2B;
    --secondary: #004E89;
    --dark: #1A1A2E;
    --light: #F8F9FA;
    --gray: #6C757D;
    --white: #FFFFFF;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 12px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; color: #333; line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: color .3s; }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.btn { display: inline-block; padding: 14px 36px; border-radius: 50px; font-size: 16px; font-weight: 600; cursor: pointer; transition: all .3s; border: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,107,53,0.35); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 18px 48px; font-size: 18px; }
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 8px; }
section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 36px; color: var(--dark); margin-bottom: 12px; }
.section-title p { font-size: 18px; color: var(--gray); }
.header { position: fixed; top: 0; width: 100%; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); z-index: 1000; box-shadow: 0 2px 20px rgba(0,0,0,0.06); }
.header .container { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { font-size: 24px; font-weight: 800; color: var(--primary); }
.logo span { color: var(--secondary); }
.nav { display: flex; gap: 32px; list-style: none; }
.nav a { font-size: 15px; font-weight: 500; color: var(--dark); }
.nav a:hover { color: var(--primary); }
.nav-cta { background: var(--primary); color: #fff !important; padding: 8px 24px; border-radius: 50px; }
.nav-cta:hover { background: var(--primary-dark); }
.mobile-toggle { display: none; font-size: 28px; cursor: pointer; background: none; border: none; }
.hero { min-height: 100vh; display: flex; align-items: center; color: #fff; padding-top: 72px; position: relative; overflow: hidden; }
.hero::after { content: ''; position: absolute; top: -50%; right: -20%; width: 800px; height: 800px; background: radial-gradient(circle, rgba(255,107,53,0.15) 0%, transparent 70%); border-radius: 50%; }
.hero-content { position: relative; z-index: 1; max-width: 700px; }
.hero h1 { font-size: 52px; line-height: 1.2; margin-bottom: 20px; font-weight: 800; }
.hero h1 em { color: var(--primary); font-style: normal; }
.hero p { font-size: 20px; opacity: 0.85; margin-bottom: 36px; line-height: 1.7; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.services { background: var(--light); }
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.service-card { background: #fff; border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s; }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(0,0,0,0.12); }
.service-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary), #FF8C5A); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 20px; }
.service-card h3 { font-size: 20px; margin-bottom: 10px; color: var(--dark); }
.service-card p { color: var(--gray); font-size: 15px; }
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.why-item { text-align: center; padding: 30px; }
.why-num { font-size: 48px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.why-item h4 { font-size: 18px; color: var(--dark); margin-bottom: 8px; }
.why-item p { color: var(--gray); font-size: 14px; }
.instructors { background: var(--light); }
.instructor-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; }
.instructor-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.instructor-avatar { width: 100%; height: 280px; background: linear-gradient(135deg, var(--secondary), var(--dark)); display: flex; align-items: center; justify-content: center; font-size: 72px; color: rgba(255,255,255,0.3); }
.instructor-info { padding: 24px; }
.instructor-info h3 { font-size: 20px; color: var(--dark); }
.instructor-info .title { color: var(--primary); font-size: 14px; margin: 6px 0 10px; }
.instructor-info p { color: var(--gray); font-size: 14px; }
.cta-section { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; text-align: center; }
.cta-section h2 { font-size: 40px; margin-bottom: 16px; }
.cta-section p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-section .btn { background: #fff; color: var(--primary); }
.cta-section .btn:hover { background: var(--dark); color: #fff; }
.footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer a { display: block; margin-bottom: 8px; font-size: 14px; }
.footer a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; font-size: 13px; }
.footer-qrcode { width: 120px; height: 120px; background: rgba(255,255,255,0.1); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 12px; color: rgba(255,255,255,0.4); margin-top: 10px; }
.page-header { background: linear-gradient(135deg, var(--secondary), var(--dark)); color: #fff; padding: 140px 0 60px; text-align: center; }
.page-header h1 { font-size: 42px; margin-bottom: 12px; }
.page-header p { font-size: 18px; opacity: 0.8; }
.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 30px; }
.course-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.course-img { height: 200px; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 48px; }
.course-body { padding: 28px; }
.course-body h3 { font-size: 22px; color: var(--dark); margin-bottom: 10px; }
.course-body .price { color: var(--primary); font-size: 28px; font-weight: 800; margin: 12px 0; }
.course-body .price small { font-size: 14px; color: var(--gray); font-weight: 400; }
.course-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.course-tags span { background: var(--light); padding: 4px 12px; border-radius: 20px; font-size: 13px; color: var(--gray); }
.course-body ul { list-style: none; margin: 16px 0; }
.course-body ul li { padding: 6px 0; font-size: 14px; color: #555; }
.course-body ul li::before { content: '¹3'; color: var(--primary); font-weight: 700; margin-right: 8px; }
.case-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 30px; }
.case-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.case-img { height: 220px; background: linear-gradient(135deg, #667eea, #764ba2); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 48px; }
.case-body { padding: 24px; }
.case-body h3 { font-size: 18px; color: var(--dark); margin-bottom: 8px; }
.case-body p { color: var(--gray); font-size: 14px; margin-bottom: 12px; }
.case-body .case-tag { display: inline-block; background: var(--light); padding: 4px 12px; border-radius: 20px; font-size: 12px; color: var(--primary); }
.article-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 30px; }
.article-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.article-img { height: 200px; background: linear-gradient(135deg, #f093fb, #f5576c); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 48px; }
.article-body { padding: 24px; }
.article-body .date { font-size: 13px; color: var(--gray); margin-bottom: 8px; }
.article-body h3 { font-size: 18px; color: var(--dark); margin-bottom: 8px; }
.article-body p { color: var(--gray); font-size: 14px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.contact-info h3 { font-size: 24px; color: var(--dark); margin-bottom: 20px; }
.contact-info p { margin-bottom: 14px; color: #555; font-size: 15px; }
.contact-form { background: #fff; padding: 36px; border-radius: var(--radius); box-shadow: var(--shadow); }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--dark); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 8px; font-size: 15px; transition: border-color .3s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group textarea { height: 120px; resize: vertical; }
@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-toggle { display: block; }
    .hero h1 { font-size: 32px; }
    .hero p { font-size: 16px; }
    .section-title h2 { font-size: 28px; }
    .footer-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .cta-section h2 { font-size: 28px; }
}
/* ===== 轮播图样式 ===== */
.carousel-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}
.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    display: flex;
    align-items: center;
}
.carousel-slide.active {
    opacity: 1;
}
.carousel-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}
.carousel-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: background 0.3s;
}
.carousel-dots .dot.active {
    background: #fff;
}
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 32px;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    z-index: 10;
    user-select: none;
    transition: color 0.3s;
    padding: 10px;
}
.carousel-arrow:hover { color: #fff; }
.carousel-arrow.next { right: 20px; }
.carousel-arrow:not(.next) { left: 20px; }

@media (max-width: 768px) {
    .carousel-container { height: 80vh; }
    .carousel-arrow { font-size: 24px; }
}