/* 字体与整体风格 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #050608;
    color: #f5f5f5;
}

body {
    line-height: 1.6;
}

/* 颜色与主题 */
:root {
    --bg-main: #050608;
    --bg-card: #0d1016;
    --bg-card-soft: #11141c;
    --accent-gold: #d4af37;
    --accent-gold-soft: #a98626;
    --text-main: #f5f5f5;
    --text-muted: #9ca3af;
    --border-soft: #1f2933;
}

/* 顶部导航 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(5, 6, 8, 0.95);
    border-bottom: 1px solid var(--border-soft);
    backdrop-filter: blur(14px);
}

.nav-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 6px;
    color: var(--accent-gold);
    text-decoration: none;
}

.nav-logo-main {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-logo-sub {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
    transition: all 0.18s ease;
}

.nav-links a:hover {
    color: var(--accent-gold);
    border-color: var(--accent-gold-soft);
}

.nav-links a.active {
    color: var(--accent-gold);
    border-color: var(--accent-gold);
}

/* 页面容器 */
.page {
    max-width: 1080px;
    margin: 0 auto;
    padding: 32px 20px 60px 20px;
}

/* Hero 区块 */
.hero {
    display: grid;
    grid-template-columns: minmax(0, 2.1fr) minmax(0, 1.5fr);
    gap: 40px;
    padding: 40px 0 24px 0;
    align-items: center;
}

.hero-title {
    font-size: 34px;
    font-weight: 600;
    margin-bottom: 16px;
}

.hero-title span.highlight {
    color: var(--accent-gold);
}

.hero-subtitle {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 560px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.badge {
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 999px;
    padding: 6px 12px;
    border: 1px solid var(--accent-gold-soft);
    color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.05);
}

.hero-card {
    background: radial-gradient(circle at top, rgba(212,175,55,0.18), transparent 55%),
                var(--bg-card);
    border-radius: 18px;
    padding: 20px 22px;
    border: 1px solid var(--border-soft);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
    font-size: 13px;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 24px;
    margin-top: 10px;
}

.metric-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.metric-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-gold);
}

/* 通用卡片 */
.section {
    margin-top: 32px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 18px;
    font-weight: 500;
}

.section-subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 16px 18px;
    border: 1px solid var(--border-soft);
}

.card h3 {
    font-size: 15px;
    margin-bottom: 6px;
}

.card p {
    font-size: 13px;
    color: var(--text-muted);
}

/* 列表 */
ul.clean-list {
    list-style: none;
    margin-top: 8px;
}

ul.clean-list li {
    font-size: 13px;
    color: var(--text-muted);
    padding-left: 14px;
    position: relative;
    margin-bottom: 4px;
}

ul.clean-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-size: 12px;
}

/* 表格（Performance 页面用） */
.table-wrapper {
    margin-top: 10px;
    background: var(--bg-card);
    border-radius: 14px;
    border: 1px solid var(--border-soft);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

thead {
    background: #141821;
}

th, td {
    padding: 9px 12px;
    text-align: left;
}

th {
    font-weight: 500;
    color: var(--accent-gold);
    border-bottom: 1px solid #1f2533;
    white-space: nowrap;
}

tbody tr:nth-child(even) {
    background: rgba(15, 19, 27, 0.9);
}

tbody tr:hover {
    background: rgba(31, 41, 51, 0.9);
}

/* 按钮 */
.btn-row {
    margin-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn-primary,
.btn-outline {
    font-size: 13px;
    padding: 8px 16px;
    border-radius: 999px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.16s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #d4af37, #a98626);
    color: #050608;
    border-color: #d4af37;
}

.btn-primary:hover {
    filter: brightness(1.06);
}

.btn-outline {
    background: transparent;
    color: var(--accent-gold);
    border-color: var(--accent-gold-soft);
}

.btn-outline:hover {
    background: rgba(212,175,55,0.08);
}

/* 联系表单 */
.form-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 18px 18px 20px 18px;
    border: 1px solid var(--border-soft);
    max-width: 540px;
}

.form-group {
    margin-bottom: 12px;
}

label {
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
    color: var(--text-muted);
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid #222838;
    background: #050608;
    color: var(--text-main);
    font-size: 13px;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

/* 页脚 */
.footer {
    border-top: 1px solid var(--border-soft);
    padding: 16px 20px 26px 20px;
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    background: #050608;
}

/* 中英文标注块 */
.dual-text {
    margin-top: 8px;
    font-size: 13px;
}

.dual-text .en {
    color: var(--text-main);
}

.dual-text .zh {
    color: var(--text-muted);
    margin-top: 2px;
}

/* 响应式 */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: minmax(0, 1fr);
    }
    .card-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .nav-links {
        flex-wrap: wrap;
        gap: 12px;
    }
}