/* ===== 全局重置 & 变量 ===== */
:root {
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #14b8a6;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 50px;
    font-weight: 600; font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer; transition: var(--transition);
    background: transparent; color: var(--text);
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(13,148,136,0.35); }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-outline-light { border-color: rgba(255,255,255,0.6); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-danger { background: #ef4444; color: #fff; border-color: #ef4444; }
.btn-danger:hover { background: #dc2626; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed; top: 0; width: 100%;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    z-index: 1000; transition: var(--transition);
    border-bottom: 1px solid transparent;
}
.navbar.scrolled { background: rgba(255,255,255,0.95); box-shadow: 0 2px 20px rgba(0,0,0,0.06); border-color: var(--border); }
.nav-container {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 20px; max-width: 1200px; margin: 0 auto;
}
.logo { font-size: 1.6rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.logo i { font-size: 1.4rem; }
.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-menu ul { display: flex; gap: 24px; }
.nav-menu ul li a {
    font-weight: 500; color: var(--text); position: relative;
    padding: 4px 0; transition: var(--transition);
}
.nav-menu ul li a::after {
    content: ''; position: absolute; bottom: -2px; left: 0;
    width: 0; height: 2px; background: var(--primary);
    transition: var(--transition);
}
.nav-menu ul li a:hover, .nav-menu ul li a.active { color: var(--primary); }
.nav-menu ul li a:hover::after, .nav-menu ul li a.active::after { width: 100%; }
.hamburger {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span { display: block; width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }

/* ===== Hero ===== */
.hero {
    min-height: 100vh; display: flex; align-items: center;
    background: linear-gradient(135deg, #0d9488 0%, #0f766e 50%, #115e59 100%);
    color: #fff; text-align: center; padding: 120px 20px 80px;
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; width: 600px; height: 600px;
    background: rgba(255,255,255,0.04); border-radius: 50%;
    top: -200px; right: -200px;
}
.hero::after {
    content: ''; position: absolute; width: 400px; height: 400px;
    background: rgba(255,255,255,0.03); border-radius: 50%;
    bottom: -100px; left: -100px;
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero-content h1 { font-size: 3.2rem; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
.hero-content h1 .highlight { color: var(--accent); }
.hero-content p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 50px; }
.hero-stats { display: flex; justify-content: center; gap: 50px; flex-wrap: wrap; }
.hero-stats div { text-align: center; }
.hero-stats strong { display: block; font-size: 2rem; font-weight: 800; color: var(--accent); }
.hero-stats span { font-size: 0.9rem; opacity: 0.8; }

/* ===== Section ===== */
.section { padding: 80px 0; }
.bg-light { background: #f1f5f9; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.section-title p { color: var(--text-light); max-width: 500px; margin: 0 auto; }

/* ===== 服务卡片 ===== */
.cards-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.card-service {
    background: var(--card-bg); border-radius: var(--radius);
    padding: 30px 24px; text-align: center; box-shadow: var(--shadow);
    transition: var(--transition); border: 1px solid var(--border);
    position: relative; overflow: hidden;
}
.card-service:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); }
.card-service .icon {
    width: 64px; height: 64px; margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; color: #fff;
}
.card-service h3 { font-size: 1.2rem; margin-bottom: 8px; }
.card-service p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 12px; }
.card-service .price { font-weight: 700; color: var(--primary); font-size: 1.1rem; }

/* ===== 优势网格 ===== */
.advantages-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.advantage-card {
    background: var(--card-bg); border-radius: var(--radius);
    padding: 28px 24px; text-align: center; box-shadow: var(--shadow);
    transition: var(--transition); border: 1px solid var(--border);
}
.advantage-card:hover { transform: translateY(-4px); box-shadow: 0 10px 25px rgba(0,0,0,0.08); }
.advantage-card .icon {
    font-size: 2rem; color: var(--primary); margin-bottom: 14px;
}
.advantage-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.advantage-card p { color: var(--text-light); font-size: 0.9rem; }

/* ===== 加盟流程 ===== */
.process-steps {
    display: flex; flex-wrap: wrap; gap: 30px; justify-content: center;
    counter-reset: step;
}
.process-step {
    flex: 1 1 200px; max-width: 240px; text-align: center;
    position: relative; padding: 24px 16px;
    background: var(--card-bg); border-radius: var(--radius);
    box-shadow: var(--shadow); border: 1px solid var(--border);
    transition: var(--transition);
}
.process-step:hover { transform: translateY(-4px); }
.process-step .step-num {
    width: 48px; height: 48px; margin: 0 auto 14px;
    background: var(--primary); color: #fff; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.2rem;
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 6px; }
.process-step p { color: var(--text-light); font-size: 0.85rem; }

/* ===== FAQ ===== */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
    background: var(--card-bg); border-radius: var(--radius-sm);
    margin-bottom: 12px; box-shadow: var(--shadow);
    border: 1px solid var(--border); overflow: hidden;
}
.faq-question {
    width: 100%; text-align: left; padding: 18px 24px;
    background: none; border: none; font-weight: 600; font-size: 1rem;
    cursor: pointer; display: flex; justify-content: space-between;
    align-items: center; transition: var(--transition); color: var(--text);
}
.faq-question i { transition: var(--transition); color: var(--primary); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
    padding: 0 24px; color: var(--text-light); font-size: 0.92rem;
    border-top: 0 solid var(--border);
}
.faq-item.active .faq-answer {
    max-height: 300px; padding: 16px 24px; border-top-width: 1px;
}

/* ===== 联系我们 ===== */
.contact-wrapper {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
    max-width: 900px; margin: 0 auto;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form input, .contact-form textarea {
    padding: 14px 18px; border: 2px solid var(--border);
    border-radius: var(--radius-sm); font-size: 0.95rem;
    transition: var(--transition); font-family: var(--font);
    background: var(--card-bg);
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,148,136,0.15);
}
.contact-info {
    display: flex; flex-direction: column; justify-content: center; gap: 20px;
    font-size: 1.05rem;
}
.contact-info i { color: var(--primary); width: 28px; }
.social-icons { display: flex; gap: 14px; margin-top: 10px; }
.social-icons a {
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: #fff; display: flex;
    align-items: center; justify-content: center;
    font-size: 1.2rem; transition: var(--transition);
}
.social-icons a:hover { background: var(--primary-dark); transform: scale(1.08); }

/* ===== 页脚 ===== */
.footer {
    background: var(--text); color: #94a3b8; text-align: center;
    padding: 30px 20px; font-size: 0.9rem;
}
.footer a { color: var(--primary-light); }
.footer a:hover { text-decoration: underline; }

/* ===== 管理后台 ===== */
.admin-page { background: #f1f5f9; }
.admin-login {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0d9488, #115e59);
    padding: 20px;
}
.login-card {
    background: #fff; border-radius: var(--radius); padding: 48px 36px;
    max-width: 400px; width: 100%; box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    text-align: center;
}
.login-card h2 { margin-bottom: 28px; font-size: 1.6rem; color: var(--text); }
.login-card h2 i { color: var(--primary); }
.login-card input {
    width: 100%; padding: 14px 18px; margin-bottom: 16px;
    border: 2px solid var(--border); border-radius: var(--radius-sm);
    font-size: 0.95rem; transition: var(--transition);
}
.login-card input:focus { border-color: var(--primary); }
.login-error { color: #ef4444; font-size: 0.85rem; margin-top: 12px; min-height: 20px; }
.admin-panel { display: flex; flex-direction: column; min-height: 100vh; }
.admin-header {
    background: var(--text); color: #fff; padding: 16px 24px;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px;
}
.admin-header h2 { font-size: 1.2rem; }
.admin-header h2 i { color: var(--primary-light); }
.admin-body { flex: 1; padding: 24px; max-width: 1200px; margin: 0 auto; width: 100%; }
.admin-section {
    background: #fff; border-radius: var(--radius); padding: 28px;
    margin-bottom: 28px; box-shadow: var(--shadow);
}
.admin-section h3 { margin-bottom: 20px; font-size: 1.15rem; color: var(--text); }
.admin-section h3 i { color: var(--primary); margin-right: 8px; }
.form-row {
    display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 14px;
}
.form-row input { flex: 1; min-width: 150px; padding: 12px 14px; border: 2px solid var(--border); border-radius: var(--radius-sm); font-size: 0.9rem; transition: var(--transition); }
.form-row input:focus { border-color: var(--primary); }
.table-wrap { overflow-x: auto; margin-top: 20px; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table th, table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
table th { background: #f8fafc; font-weight: 600; color: var(--text-light); }
table td .btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed; top: 64px; left: 0; width: 100%;
        background: rgba(255,255,255,0.98); flex-direction: column;
        padding: 20px; gap: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transform: translateY(-110%); transition: var(--transition);
        backdrop-filter: blur(12px);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-menu ul { flex-direction: column; gap: 12px; width: 100%; }
    .nav-menu ul li a { display: block; padding: 10px 0; }
    .hero-content h1 { font-size: 2rem; }
    .hero-stats { gap: 24px; }
    .hero-stats strong { font-size: 1.6rem; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .section-title h2 { font-size: 1.6rem; }
    .cards-grid, .advantages-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; align-items: center; }
    .process-step { max-width: 100%; width: 100%; }
    .admin-body { padding: 16px; }
    .admin-section { padding: 18px; }
    .form-row input { min-width: 100%; }
}

@media (max-width: 480px) {
    .hero { padding: 100px 16px 60px; }
    .hero-content h1 { font-size: 1.7rem; }
    .hero-btns .btn { width: 100%; justify-content: center; }
    .login-card { padding: 32px 20px; }
}
/* ===== 删除按钮样式 ===== */
.btn-sm.btn-danger { padding: 6px 14px; font-size: 0.8rem; }
.btn-sm.btn-outline { padding: 6px 14px; font-size: 0.8rem; }
/* ===== 管理后台表单内按钮间距 ===== */
.admin-section form .btn { margin-right: 8px; margin-top: 6px; }
/* ===== 管理后台表格操作列 ===== */
table td .btn + .btn { margin-left: 6px; }
/* ===== 成功提示 ===== */
.toast {
    position: fixed; bottom: 30px; right: 30px;
    background: var(--text); color: #fff; padding: 14px 24px;
    border-radius: var(--radius-sm); box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    font-size: 0.9rem; z-index: 9999; animation: fadeInUp 0.4s ease;
    display: flex; align-items: center; gap: 10px;
}
.toast i { color: var(--primary-light); }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}