/* ============================================================
   Gemdrfly · IT 技术服务 站点样式
   深色主题 · 玻璃拟态 · 响应式
   ============================================================ */

:root {
    --bg-1: #0f172a;
    --bg-2: #1e293b;
    --primary: #667eea;
    --primary-2: #764ba2;
    --text: #ffffff;
    --text-2: #94a3b8;
    --text-3: #64748b;
    --card-bg: rgba(30, 41, 59, 0.8);
    --card-border: rgba(148, 163, 184, 0.2);
    --green: #22c55e;
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 100%);
    background-attachment: fixed;
    color: var(--text);
    min-height: 100vh;
    line-height: 1.7;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 60px 24px;
    animation: fadeIn 0.8s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 导航 ---------- */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 32px;
    max-width: 1080px;
    margin: 0 auto;
}

.nav .logo {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav .links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav .links a {
    color: var(--text-2);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.25s ease;
}

.nav .links a:hover,
.nav .links a.active {
    color: var(--text);
    background: rgba(51, 65, 85, 0.6);
}

/* ---------- Hero ---------- */
.hero {
    text-align: center;
    padding: 60px 0 20px;
}

.hero .eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--primary);
    border: 1px solid rgba(102, 126, 234, 0.4);
    border-radius: 20px;
    padding: 6px 16px;
    margin-bottom: 24px;
}

h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    color: var(--text-2);
    font-size: 19px;
    max-width: 640px;
    margin: 0 auto 36px;
    font-weight: 300;
}

.btn-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.btn-ghost {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--card-border);
    color: var(--text);
}

.btn-ghost:hover {
    background: rgba(51, 65, 85, 0.9);
    border-color: rgba(148, 163, 184, 0.4);
    transform: translateY(-2px);
}

/* ---------- 板块 ---------- */
.section {
    margin-top: 80px;
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-2);
    margin-bottom: 36px;
    max-width: 620px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

/* ---------- 卡片 ---------- */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    border-color: rgba(148, 163, 184, 0.4);
}

.card .icon {
    font-size: 34px;
    margin-bottom: 16px;
}

.card h3 {
    color: var(--primary);
    font-size: 20px;
    margin-bottom: 10px;
}

.card p {
    color: var(--text-2);
    font-size: 15px;
}

.card .price {
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
    margin-top: 16px;
}

.card .price small {
    color: var(--text-3);
    font-weight: 400;
    font-size: 13px;
}

/* ---------- 标签 ---------- */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.tag {
    background: rgba(102, 126, 234, 0.18);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

/* ---------- 列表 ---------- */
ul.check {
    list-style: none;
    margin-top: 14px;
}

ul.check li {
    color: var(--text-2);
    font-size: 14px;
    padding: 4px 0;
}

ul.check li::before {
    content: "✓ ";
    color: var(--green);
    font-weight: 700;
}

/* ---------- 联系 CTA ---------- */
.cta {
    margin-top: 80px;
    text-align: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 48px 32px;
    backdrop-filter: blur(10px);
}

.cta h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.cta p {
    color: var(--text-2);
    margin-bottom: 28px;
}

/* ---------- 表单 ---------- */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    color: var(--text-2);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: #fff;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

/* ---------- 返回链接 / 面包屑 ---------- */
.back-link {
    display: inline-block;
    margin-bottom: 24px;
    color: var(--text-2);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--primary);
}

/* ---------- 页脚 ---------- */
.footer {
    margin-top: 80px;
    padding-top: 32px;
    border-top: 1px solid var(--card-border);
    color: var(--text-3);
    font-size: 14px;
    text-align: center;
}

.footer a {
    color: var(--text-2);
    text-decoration: none;
}

.footer a:hover {
    color: var(--primary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .container {
        padding: 40px 20px;
    }

    h1 {
        font-size: 34px;
    }

    .nav {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
    }

    .hero .subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 24px;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}