/* ============================================================
   TP.INC — 暗色科技感 · 渐变霓虹 · 模块化
============================================================ */
:root {
    --bg-0: #05070d;
    --bg-1: #0a0f1c;
    --bg-2: #0f172a;
    --bg-3: #131c33;
    --line: rgba(148, 163, 184, 0.08);
    --line-strong: rgba(148, 163, 184, 0.16);
    --text-1: #e2e8f0;
    --text-2: #94a3b8;
    --text-3: #64748b;
    --neon-1: #22d3ee;
    --neon-2: #a855f7;
    --neon-3: #ec4899;
    --neon-4: #3b82f6;
    --accent: #22d3ee;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-glow: 0 0 40px rgba(34, 211, 238, 0.15);
    --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 10px 30px rgba(0,0,0,0.4);
    --max: 1240px;
    --pad: 28px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
    background: var(--bg-0); color: var(--text-1);
    font-family: -apple-system, "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color .15s; }
img, svg { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---- 背景层 ---- */
body::before {
    content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none;
    background:
        radial-gradient(800px 600px at 80% -10%, rgba(168, 85, 247, 0.18), transparent 60%),
        radial-gradient(900px 600px at -10% 30%, rgba(34, 211, 238, 0.16), transparent 60%),
        radial-gradient(700px 500px at 50% 110%, rgba(59, 130, 246, 0.14), transparent 60%);
}
body::after {
    content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background-image:
        linear-gradient(rgba(148,163,184,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,0.04) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 75%);
            mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 75%);
}

/* ---- 通用容器 / 排版 ---- */
.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
section { padding: 96px 0; position: relative; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
    display: inline-block; padding: 6px 14px; border-radius: 999px;
    background: linear-gradient(90deg, rgba(34,211,238,0.12), rgba(168,85,247,0.12));
    border: 1px solid var(--line-strong);
    font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
    color: var(--neon-1); margin-bottom: 18px;
}
.section-title {
    font-size: clamp(32px, 4.4vw, 52px); font-weight: 800; letter-spacing: -0.02em;
    background: linear-gradient(180deg, #fff, #94a3b8);
    -webkit-background-clip: text; background-clip: text; color: transparent;
    line-height: 1.1; margin-bottom: 18px;
}
.section-sub { color: var(--text-2); max-width: 720px; margin: 0 auto; font-size: 17px; }

/* ---- 通用按钮 ---- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 10px; font-size: 15px; font-weight: 600; transition: transform .15s, box-shadow .15s, background .2s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--neon-1), var(--neon-4)); color: #020617; box-shadow: 0 8px 24px rgba(34,211,238,0.35); }
.btn-primary:hover { box-shadow: 0 12px 32px rgba(34,211,238,0.5); }
.btn-outline { background: rgba(255,255,255,0.04); color: #fff; border: 1px solid var(--line-strong); }
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: var(--neon-1); }
.btn-ghost { background: transparent; color: var(--text-2); padding: 10px 16px; }
.btn-ghost:hover { color: #fff; }
.btn-lg { padding: 16px 30px; font-size: 16px; }
.btn-block { display: flex; width: 100%; justify-content: center; }

/* ---- 导航 ---- */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(14px); background: rgba(5, 7, 13, 0.7); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: #fff; }
.logo-mark {
    width: 32px; height: 32px; border-radius: 8px;
    background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
    display: grid; place-items: center; color: #020617; font-weight: 900; font-size: 16px;
    box-shadow: 0 0 20px rgba(34,211,238,0.4);
}
.logo-text { letter-spacing: -0.01em; }
.logo-text small { color: var(--text-3); font-weight: 400; margin-left: 6px; font-size: 12px; }
.main-nav ul { display: flex; gap: 6px; }
.main-nav a { display: inline-block; padding: 8px 14px; border-radius: 8px; color: var(--text-2); font-size: 14px; font-weight: 500; }
.main-nav a:hover { color: #fff; background: rgba(255,255,255,0.04); }
.main-nav a.active { color: var(--neon-1); background: rgba(34,211,238,0.08); }
.header-cta { display: flex; align-items: center; gap: 10px; }
.header-cta .btn { padding: 9px 16px; font-size: 14px; }
.nav-toggle { display: none; }

/* ---- HERO ---- */
.hero { padding: 80px 0 100px; position: relative; overflow: hidden; }
.hero::before {
    content: ''; position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
    width: 700px; height: 700px; border-radius: 50%;
    background: radial-gradient(closest-side, rgba(34,211,238,0.18), transparent);
    pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 14px; border-radius: 999px; background: rgba(34,211,238,0.08);
    border: 1px solid rgba(34,211,238,0.25);
    color: var(--neon-1); font-size: 13px; margin-bottom: 24px;
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--neon-1); box-shadow: 0 0 8px var(--neon-1); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .3; transform: scale(.7); } }
.hero-title { font-size: clamp(40px, 5.4vw, 68px); font-weight: 800; letter-spacing: -0.025em; line-height: 1.05; margin-bottom: 22px; }
.hero-title .grad {
    background: linear-gradient(135deg, var(--neon-1) 0%, var(--neon-2) 50%, var(--neon-3) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { color: var(--text-2); font-size: 18px; max-width: 540px; margin-bottom: 36px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 36px; }
.hero-stats .stat strong { display: block; font-size: 24px; font-weight: 800; color: #fff; }
.hero-stats .stat span { color: var(--text-3); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }

/* hero 右侧模拟仪表盘 */
.dash {
    background: linear-gradient(180deg, rgba(15,23,42,0.85), rgba(10,15,28,0.95));
    border: 1px solid var(--line-strong);
    border-radius: 16px; padding: 22px;
    box-shadow: var(--shadow-card), var(--shadow-glow);
    position: relative;
    transform: perspective(1200px) rotateY(-3deg) rotateX(2deg);
    transition: transform .6s;
}
.dash:hover { transform: perspective(1200px) rotateY(0) rotateX(0); }
.dash-bar { display: flex; gap: 6px; margin-bottom: 18px; }
.dash-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.dash-bar span:nth-child(1) { background: #ef4444; }
.dash-bar span:nth-child(2) { background: #eab308; }
.dash-bar span:nth-child(3) { background: #22c55e; }
.dash-h { display: flex; justify-content: space-between; align-items: end; margin-bottom: 16px; }
.dash-h h4 { font-size: 13px; color: var(--text-3); text-transform: uppercase; letter-spacing: .1em; }
.dash-h .price { font-size: 32px; font-weight: 800; color: #fff; }
.dash-h .change { color: #22c55e; font-size: 13px; font-weight: 600; }
.dash-chart {
    height: 120px; margin-bottom: 18px; position: relative; overflow: hidden;
    background:
        linear-gradient(rgba(148,163,184,0.06) 1px, transparent 1px) 0 0/100% 24px,
        linear-gradient(90deg, rgba(148,163,184,0.06) 1px, transparent 1px) 0 0/24px 100%;
}
.dash-chart svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.dash-chart .area { fill: url(#grad); }
.dash-chart .line { fill: none; stroke: var(--neon-1); stroke-width: 2; filter: drop-shadow(0 0 6px rgba(34,211,238,0.6)); }
.dash-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.dash-grid .item { background: rgba(255,255,255,0.03); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.dash-grid .item .k { font-size: 10px; color: var(--text-3); text-transform: uppercase; letter-spacing: .08em; }
.dash-grid .item .v { font-size: 16px; font-weight: 700; color: #fff; }
.dash-grid .item.up .v { color: #22c55e; }
.dash-grid .item.down .v { color: #ef4444; }
.hero-trust { text-align: center; color: var(--text-3); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; margin-top: 80px; }
.hero-trust + .logo-row { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; margin-top: 24px; }
.hero-trust + .logo-row span { color: var(--text-3); font-weight: 700; font-size: 18px; letter-spacing: .04em; opacity: .8; }

/* ---- 核心能力 (3-col grid) ---- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
    background: linear-gradient(180deg, rgba(15,23,42,0.6), rgba(10,15,28,0.6));
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg); padding: 32px 28px;
    transition: transform .2s, border-color .2s, box-shadow .2s;
    position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-1), transparent);
    opacity: 0; transition: opacity .3s;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,0.35); box-shadow: var(--shadow-card); }
.feature-card:hover::before { opacity: 1; }
.feature-icon { width: 56px; height: 56px; border-radius: 12px; display: grid; place-items: center; font-size: 24px; margin-bottom: 22px;
    background: linear-gradient(135deg, rgba(34,211,238,0.15), rgba(168,85,247,0.15));
    border: 1px solid var(--line-strong); color: var(--neon-1);
}
.feature-card h3 { font-size: 19px; margin-bottom: 12px; color: #fff; }
.feature-card p { color: var(--text-2); font-size: 14px; line-height: 1.65; }

/* ---- 产品 / 解决方案 (overview) ---- */
.alt-bg { background: linear-gradient(180deg, transparent, rgba(34,211,238,0.03) 50%, transparent); }
.product-card, .preview-card {
    background: rgba(15,23,42,0.5);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: transform .2s, border-color .2s;
}
.product-card:hover, .preview-card:hover { transform: translateY(-3px); border-color: rgba(168,85,247,0.35); }
.product-icon, .preview-placeholder {
    width: 48px; height: 48px; border-radius: 10px;
    background: linear-gradient(135deg, var(--neon-2), var(--neon-3));
    display: grid; place-items: center; font-size: 20px; font-weight: 800; color: #fff;
    margin-bottom: 20px;
}
.preview-placeholder { background: linear-gradient(135deg, rgba(34,211,238,0.2), rgba(168,85,247,0.2)); color: var(--neon-1); border: 1px solid var(--line-strong); }
.preview-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card h3, .preview-card h3 { font-size: 22px; color: #fff; margin-bottom: 6px; }
.product-summary { color: var(--text-3); font-size: 13px; margin-bottom: 14px; letter-spacing: .04em; }
.product-features { color: var(--text-2); font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
.card-link { color: var(--neon-1); font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.card-link:hover { gap: 10px; }

/* ---- 适用场景 6 列 ---- */
.use-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.use-card {
    background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong);
    border-radius: var(--radius-md); padding: 28px 18px; text-align: center;
    transition: transform .2s, border-color .2s, background .2s;
}
.use-card:hover { transform: translateY(-3px); border-color: rgba(34,211,238,0.35); background: rgba(34,211,238,0.04); }
.use-icon { font-size: 28px; margin-bottom: 10px; }
.use-card h4 { font-size: 14px; color: #fff; }

/* ---- 客户证言 ---- */
.testimonials { max-width: 880px; margin: 0 auto; }
.testimonial {
    display: grid; grid-template-columns: 80px 1fr; gap: 28px;
    padding: 32px 0; border-top: 1px solid var(--line);
}
.testimonial:last-child { border-bottom: 1px solid var(--line); }
.testimonial .avatar {
    width: 64px; height: 64px; border-radius: 50%;
    background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
    display: grid; place-items: center; color: #020617; font-weight: 800; font-size: 22px;
}
.testimonial blockquote { font-size: 18px; color: var(--text-1); line-height: 1.7; margin-bottom: 14px; font-weight: 400; }
.testimonial blockquote::before { content: '"'; color: var(--neon-1); font-size: 28px; margin-right: 4px; }
.testimonial .who { color: var(--text-3); font-size: 13px; }
.testimonial .who strong { color: #fff; }

.price-card {
    background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg); padding: 32px 26px;
    transition: transform .2s;
    display: flex; flex-direction: column;
}
.price-card.highlight {
    border-color: rgba(34,211,238,0.5);
    background: linear-gradient(180deg, rgba(34,211,238,0.06), rgba(15,23,42,0.5));
    box-shadow: var(--shadow-glow);
    position: relative;
}
.price-card.highlight::before {
    content: '最受欢迎'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
    color: #020617; font-size: 11px; font-weight: 700; letter-spacing: .08em;
    padding: 4px 12px; border-radius: 999px;
}
.price-card h3 { font-size: 20px; color: #fff; margin-bottom: 6px; }
.price-tag { color: var(--text-3); font-size: 13px; margin-bottom: 22px; }
.price-num { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.price-num small { font-size: 14px; font-weight: 400; color: var(--text-3); }
.price-card ul { margin: 24px 0; flex: 1; }
.price-card li { color: var(--text-2); font-size: 14px; padding: 8px 0; padding-left: 22px; position: relative; }
.price-card li::before { content: '✓'; position: absolute; left: 0; color: var(--neon-1); font-weight: 700; }

/* ---- CTA band ---- */
.cta-band {
    background: linear-gradient(135deg, rgba(34,211,238,0.08), rgba(168,85,247,0.08));
    border: 1px solid var(--line-strong);
    border-radius: 24px; padding: 64px 48px; text-align: center;
    position: relative; overflow: hidden;
}
.cta-band::before {
    content: ''; position: absolute; inset: -2px;
    background: linear-gradient(135deg, var(--neon-1), var(--neon-2), var(--neon-3));
    z-index: -1; border-radius: 24px; opacity: .5;
    filter: blur(40px);
}
.cta-band h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 800; color: #fff; margin-bottom: 14px; letter-spacing: -0.02em; }
.cta-band p { color: var(--text-2); font-size: 17px; max-width: 600px; margin: 0 auto 32px; }

/* ---- Footer ---- */
.site-footer { background: var(--bg-1); border-top: 1px solid var(--line); padding: 64px 0 24px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 48px; margin-bottom: 48px; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 18px; font-weight: 600; }
.footer-col li, .footer-col p { color: var(--text-2); font-size: 13px; padding: 4px 0; }
.footer-col a:hover { color: var(--neon-1); }
.footer-brand p { color: var(--text-2); font-size: 13px; max-width: 320px; margin: 14px 0; line-height: 1.7; }
.footer-contact p { display: flex; align-items: center; gap: 8px; }
.footer-contact .icon { color: var(--neon-1); }
.footer-bottom { padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; color: var(--text-3); font-size: 12px; }

/* ---- 子页面通用 ---- */
.page-banner { padding: 100px 0 60px; text-align: center; position: relative; }
.page-banner h1 { font-size: clamp(36px, 4.6vw, 56px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 16px;
    background: linear-gradient(180deg, #fff, #94a3b8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-banner p { color: var(--text-2); max-width: 600px; margin: 0 auto; font-size: 17px; }
.page-banner-sm { padding: 80px 0 32px; }

/* ---- Products / Solutions grid ---- */
@media (max-width: 900px) { .products-grid, .preview-grid, .pricing-grid, .use-grid, .footer-grid, .about-stats, .news-layout, .hero-grid { grid-template-columns: 1fr !important; } }

/* ---- Solution rows ---- */
.solutions-list { display: flex; flex-direction: column; gap: 20px; }
.solution-row {
    display: grid; grid-template-columns: 120px 1fr; gap: 32px; align-items: center;
    background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg); padding: 32px 36px;
    transition: border-color .2s, transform .2s;
}
.solution-row:hover { border-color: rgba(34,211,238,0.35); transform: translateX(4px); }
.solution-icon-lg { width: 80px; height: 80px; border-radius: 16px;
    background: linear-gradient(135deg, rgba(34,211,238,0.15), rgba(168,85,247,0.15));
    border: 1px solid var(--line-strong);
    display: grid; place-items: center; font-size: 32px; color: var(--neon-1); font-weight: 800; }
.solution-info h3 { font-size: 22px; color: #fff; margin-bottom: 6px; }
.solution-tag { color: var(--neon-1); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; display: inline-block; }
.solution-info p { color: var(--text-2); margin-bottom: 16px; }
.solution-points { display: flex; gap: 10px; flex-wrap: wrap; }
.solution-points span { background: rgba(34,211,238,0.06); border: 1px solid rgba(34,211,238,0.2); padding: 5px 12px; border-radius: 999px; font-size: 12px; color: var(--text-1); }

/* ---- Detail pages ---- */
.detail-wrap { max-width: 880px; margin: 0 auto; padding: 0 var(--pad); }
.detail-content { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); padding: 48px 52px; }
.detail-content h1 { font-size: 38px; color: #fff; margin-bottom: 10px; letter-spacing: -0.02em; }
.detail-content .summary { color: var(--neon-1); font-size: 16px; margin-bottom: 32px; }
.detail-content h3 { color: #fff; font-size: 18px; margin: 28px 0 12px; }
.detail-content p, .detail-content li { color: var(--text-2); font-size: 15px; line-height: 1.8; margin-bottom: 14px; }
.detail-content ul, .detail-content ol { padding-left: 22px; }
.detail-content strong { color: #fff; }
.specs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 32px 0; padding: 24px; background: rgba(34,211,238,0.04); border: 1px solid rgba(34,211,238,0.15); border-radius: 12px; }
.specs div { text-align: center; }
.specs .k { color: var(--text-3); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 6px; }
.specs .v { color: #fff; font-weight: 800; font-size: 22px; }
.detail-desc { color: var(--text-2); font-size: 16px; line-height: 1.8; margin-bottom: 24px; }
@media (max-width: 600px) { .specs { grid-template-columns: repeat(2, 1fr); } }

/* ---- News ---- */
.news-layout { display: grid; grid-template-columns: 1fr 280px; gap: 48px; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.news-main { display: flex; flex-direction: column; gap: 18px; }
.news-card { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-md); padding: 26px 28px; transition: border-color .2s, transform .2s; }
.news-card:hover { border-color: rgba(34,211,238,0.3); transform: translateX(4px); }
.news-card h3 { color: #fff; font-size: 20px; margin-bottom: 10px; }
.news-card h3 a:hover { color: var(--neon-1); }
.news-meta { color: var(--text-3); font-size: 12px; }
.news-summary { color: var(--text-2); font-size: 14px; margin-top: 10px; line-height: 1.7; }
.news-category { color: var(--neon-1); margin-right: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.news-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-md); padding: 24px; }
.sidebar-widget h4 { color: #fff; font-size: 14px; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.category-list li { padding: 8px 0; border-bottom: 1px dashed var(--line); color: var(--text-2); font-size: 14px; }
.category-list li:last-child { border-bottom: none; }
.category-list li:hover { color: var(--neon-1); }
.recent-list li { padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 13px; }
.recent-list li:last-child { border-bottom: none; }
.recent-list a { color: var(--text-2); }
.recent-list a:hover { color: var(--neon-1); }
.recent-list .date { color: var(--text-3); font-size: 11px; display: block; margin-top: 4px; }

/* ---- News detail ---- */
.article-content { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); padding: 48px 52px; max-width: 880px; margin: 0 auto; }
.article-content h1 { font-size: 36px; color: #fff; margin-bottom: 16px; letter-spacing: -0.02em; }
.article-meta-bar { display: flex; gap: 16px; color: var(--text-3); font-size: 13px; padding-bottom: 24px; margin-bottom: 32px; border-bottom: 1px solid var(--line); }
.article-meta-bar strong { color: var(--neon-1); }
.article-content h3 { color: #fff; font-size: 19px; margin: 28px 0 12px; }
.article-content p, .article-content li { color: var(--text-2); font-size: 16px; line-height: 1.85; margin-bottom: 14px; }
.article-content ul, .article-content ol { padding-left: 22px; }
.article-content strong { color: #fff; }
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 880px; margin: 32px auto 0; }
.article-nav a { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-md); padding: 18px 22px; color: var(--text-2); font-size: 14px; }
.article-nav a:hover { border-color: rgba(34,211,238,0.3); color: #fff; }
.article-nav-prev::before, .article-nav-next::after { display: block; font-size: 11px; color: var(--text-3); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 6px; }
.article-nav-prev::before { content: '← 上一篇'; }
.article-nav-next::after { content: '下一篇 →'; text-align: right; }
.article-nav-next { text-align: right; }

/* ---- About ---- */
.about-intro { max-width: 720px; margin: 0 auto 64px; text-align: center; }
.about-intro h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; color: #fff; margin-bottom: 20px; letter-spacing: -0.02em; }
.about-intro p { color: var(--text-2); font-size: 17px; line-height: 1.8; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 980px; margin: 0 auto 80px; }
.stat-item { text-align: center; padding: 28px 20px; background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-md); }
.stat-num { font-size: 38px; font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--neon-1), var(--neon-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { color: var(--text-3); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; margin-top: 8px; }

.timeline { max-width: 720px; margin: 0 auto; position: relative; }
.timeline::before { content: ''; position: absolute; left: 90px; top: 0; bottom: 0; width: 1px; background: var(--line-strong); }
.timeline-item { display: grid; grid-template-columns: 100px 1fr; gap: 32px; padding: 24px 0; align-items: start; }
.timeline-year { color: var(--neon-1); font-weight: 800; font-size: 18px; padding-top: 4px; }
.timeline-content { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-md); padding: 18px 22px; position: relative; }
.timeline-content::before { content: ''; position: absolute; left: -8px; top: 24px; width: 12px; height: 12px; border-radius: 50%; background: var(--neon-1); box-shadow: 0 0 12px var(--neon-1); }
.timeline-content h4 { color: #fff; font-size: 15px; margin-bottom: 6px; }
.timeline-content p { color: var(--text-2); font-size: 14px; }
@media (max-width: 600px) { .timeline::before { display: none; } .timeline-item { grid-template-columns: 1fr; gap: 8px; } }

/* ---- Contact ---- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.contact-info { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); padding: 40px 36px; }
.contact-item { display: flex; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: none; }
.contact-icon { width: 44px; height: 44px; border-radius: 10px; background: linear-gradient(135deg, rgba(34,211,238,0.15), rgba(168,85,247,0.15)); border: 1px solid var(--line-strong); display: grid; place-items: center; color: var(--neon-1); font-size: 18px; flex-shrink: 0; }
.contact-item h4 { color: #fff; font-size: 14px; margin-bottom: 4px; }
.contact-item p { color: var(--text-2); font-size: 13px; }
.contact-form { background: rgba(15,23,42,0.5); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); padding: 40px 36px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: var(--text-2); font-size: 13px; margin-bottom: 8px; }
.contact-form input, .contact-form textarea {
    width: 100%; padding: 12px 16px; background: rgba(255,255,255,0.03);
    border: 1px solid var(--line-strong); border-radius: 8px; color: #fff; font-size: 14px; font-family: inherit;
    box-sizing: border-box; transition: border-color .2s, box-shadow .2s;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none; border-color: var(--neon-1); box-shadow: 0 0 0 3px rgba(34,211,238,0.12);
}
.contact-form textarea { resize: vertical; min-height: 120px; }
.alert { padding: 14px 18px; border-radius: 8px; background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #22c55e; font-size: 14px; margin-bottom: 20px; }
@media (max-width: 900px) { .contact-layout { grid-template-columns: 1fr; } }

/* ---- 404 ---- */
.error-page { text-align: center; padding: 120px 20px; }
.error-page h1 { font-size: 96px; font-weight: 900;
    background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
    -webkit-background-clip: text; background-clip: text; color: transparent; }
.error-page p { color: var(--text-2); margin: 16px 0 32px; font-size: 18px; }