/* ========== 基础重置与变量 ========== */
:root {
    --bg: #0a0e1a;
    --bg-alt: #111728;
    --bg-card: #15192c;
    --text: #e6e8ee;
    --text-dim: #9aa3b8;
    --accent: #d4a857;
    --accent-2: #f0c878;
    --border: rgba(255, 255, 255, 0.08);
    --radius: 12px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    --container: 1180px;
    --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
        "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 18px 0;
    background: rgba(10, 14, 26, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    box-shadow: 0 0 0 2px rgba(212, 168, 87, 0.35), 0 4px 14px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition);
}

.logo:hover .logo-img { transform: scale(1.06); }

.logo-footer .logo-img { width: 44px; height: 44px; }

.logo-text {
    font-size: 14px;
    color: var(--text-dim);
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    font-size: 15px;
    color: var(--text-dim);
    position: relative;
    padding: 4px 0;
}

.nav-links a:hover { color: var(--text); }

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 0; height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

.nav-links a:hover::after { width: 100%; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--text);
    border-radius: 2px;
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 140px 0 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(212, 168, 87, 0.15), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(80, 120, 220, 0.12), transparent 50%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-inner {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-tag {
    color: var(--accent);
    letter-spacing: 4px;
    font-size: 13px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 28px;
    letter-spacing: 1px;
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-dim);
    max-width: 720px;
    margin: 0 auto 40px;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #1a1a1a;
    box-shadow: 0 8px 24px rgba(212, 168, 87, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(212, 168, 87, 0.45);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
    margin-left: 12px;
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-block { width: 100%; }

.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

/* 数字统计 */
.hero-stats {
    margin-top: 100px;
    border-top: 1px solid var(--border);
    padding-top: 50px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 12px;
}

.stat-num {
    font-size: 42px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-num::after { content: '+'; }

.stat-label {
    color: var(--text-dim);
    font-size: 14px;
    margin-top: 6px;
    letter-spacing: 2px;
}

/* ========== 通用 Section ========== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-alt { background: var(--bg-alt); }

.section-head {
    text-align: center;
    margin-bottom: 64px;
}

.section-en {
    color: var(--accent);
    letter-spacing: 6px;
    font-size: 13px;
    margin-bottom: 14px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 14px;
}

.section-desc {
    color: var(--text-dim);
    font-size: 16px;
}

/* ========== 关于我们 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-dim);
    margin-bottom: 18px;
    font-size: 15.5px;
}

.about-points {
    margin-top: 24px;
}

.about-points li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text);
    font-size: 15px;
}

.dot {
    width: 8px; height: 8px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 12px var(--accent);
}

.about-card {
    background: linear-gradient(160deg, var(--bg-card), rgba(21, 25, 44, 0.5));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow);
}

.card-item {
    padding: 20px 0;
    border-bottom: 1px dashed var(--border);
}

.card-item:last-child { border-bottom: none; }

.card-title {
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 16px;
}

.card-item p { color: var(--text-dim); font-size: 14.5px; }

/* ========== 业务领域 ========== */
.biz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.biz-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.biz-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.biz-card:hover {
    transform: translateY(-6px);
    border-color: rgba(212, 168, 87, 0.3);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.biz-card:hover::before { transform: scaleX(1); }

.biz-icon {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 16px;
    font-family: 'Courier New', monospace;
}

.biz-card h3 {
    font-size: 20px;
    margin-bottom: 14px;
}

.biz-card p {
    color: var(--text-dim);
    font-size: 14.5px;
    line-height: 1.8;
}

/* ========== 核心优势 ========== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.adv-item {
    padding: 30px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
    transition: all var(--transition);
}

.adv-item:hover {
    background: linear-gradient(160deg, var(--bg-card), rgba(212, 168, 87, 0.05));
    transform: translateY(-4px);
}

.adv-icon {
    width: 56px; height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #1a1a1a;
    border-radius: 14px;
    font-size: 24px;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(212, 168, 87, 0.25);
}

.adv-item h4 {
    font-size: 17px;
    margin-bottom: 10px;
}

.adv-item p {
    color: var(--text-dim);
    font-size: 14px;
}

/* ========== 联系我们 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
}

.info-block {
    padding: 18px 0;
    border-bottom: 1px dashed var(--border);
}

.info-block:last-child { border-bottom: none; }

.info-label {
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.info-value {
    font-size: 16px;
    color: var(--text);
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: inherit;
    font-size: 14.5px;
    transition: all var(--transition);
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(212, 168, 87, 0.15);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-dim); }

/* ========== 页脚 ========== */
.footer {
    background: #06091a;
    border-top: 1px solid var(--border);
    padding: 50px 0 30px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-desc {
    color: var(--text-dim);
    font-size: 14px;
    margin-top: 12px;
    max-width: 480px;
}

.footer-right {
    text-align: right;
    color: var(--text-dim);
    font-size: 13.5px;
}

.footer-right p { margin: 4px 0; }

.beian {
    margin-top: 10px !important;
}

.beian a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-dim);
    transition: color var(--transition);
}

.beian a:hover { color: var(--accent); }

.beian-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px; height: 16px;
    background: var(--accent);
    color: #1a1a1a;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 700;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { flex-direction: column; text-align: center; }
    .footer-right { text-align: center; }
    .logo-footer { justify-content: center; }
}

@media (max-width: 600px) {
    .hero { padding-top: 110px; }
    .hero-stats { margin-top: 60px; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 70px 0; }
}

/* ========== 滚动入场动画 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}