/* 首页设计系统（从 index.html 内联样式抽取，供全站统一使用） */
/* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        :root {
            --bg: #fafafa;
            --bg-card: #ffffff;
            --bg-elevated: #f5f5f4;
            --text-primary: #1a1a1a;
            --text-secondary: #6b7280;
            --text-tertiary: #9ca3af;
            --border: rgba(0,0,0,0.06);
            --border-strong: rgba(0,0,0,0.1);
            --accent: #e84c3d;
            --accent-soft: rgba(232,76,61,0.08);
            --accent-hover: #d43d2f;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        /* ===== Utility ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ===== Navigation ===== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height:100px;
            background: rgba(250,250,250,0.82);
            backdrop-filter: saturate(180%) blur(16px);
            -webkit-backdrop-filter: saturate(180%) blur(16px);
            border-bottom: 1px solid var(--border);
            transition: background 0.2s;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 17px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .nav-brand img { width:65px; height: auto; }
        .nav-brand span { opacity: 0.6; font-weight: 400; font-size:24px; color:#000000; letter-spacing: 0;font-family: cursive; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 8px 16px;
            font-size: 14.5px;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.15s, background 0.15s;
            letter-spacing: -0.01em;
            font-weight: 500;
        }
        .nav-links a:hover { color: var(--text-primary); background: var(--bg-elevated); }
        .nav-links a.active {
            color: var(--text-primary);
            background: var(--accent-soft);
        }

        .nav-links a.nav-cta {
            padding: 9px 22px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            border-radius: 6px;
            transition: background 0.15s, transform 0.15s;
            letter-spacing: -0.01em;
        }
        .nav-links a.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }

        /* ===== Hero ===== */
        .hero {
            padding: 160px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background:
                radial-gradient(ellipse 60% 50% at 50% 40%, rgba(232,76,61,0.04) 0%, transparent 70%),
                radial-gradient(ellipse 50% 50% at 20% 80%, rgba(232,76,61,0.03) 0%, transparent 60%),
                radial-gradient(ellipse 50% 50% at 80% 80%, rgba(180,130,80,0.03) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-content { position: relative; z-index: 1; }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 14px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 100px;
            font-size: 12.5px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            letter-spacing: -0.01em;
            font-weight: 500;
        }
        .hero-badge-dot {
            width: 6px; height: 6px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 6px rgba(34,197,94,0.4);
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.12;
            color: var(--text-primary);
            margin-bottom: 20px;
        }
        .hero h1 em {
            font-style: normal;
            background: linear-gradient(135deg, #e84c3d 0%, #f4724a 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 40px;
            line-height: 1.7;
            letter-spacing: -0.01em;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.15s;
            letter-spacing: -0.01em;
            cursor: pointer;
            border: none;
            font-family: var(--font);
        }
        .btn-primary {
            background: var(--text-primary);
            color: #fff;
        }
        .btn-primary:hover { background: #333; transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .btn-secondary {
            background: var(--bg-card);
            color: var(--text-primary);
            border: 1px solid var(--border-strong);
        }
        .btn-secondary:hover { background: var(--bg-elevated); border-color: rgba(0,0,0,0.18); }

        .btn .kbd {
            display: inline-block;
            padding: 2px 6px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-tertiary);
            background: rgba(0,0,0,0.04);
            border-radius: 4px;
            letter-spacing: 0;
        }

        .hero-mockup {
            margin-top: 64px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            background: var(--bg-card);
        }
        .hero-mockup img { width: 100%; display: block; }

        /* ===== Section Common ===== */
        .section { padding: 100px 0; }

        .section-label {
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.025em;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
            letter-spacing: -0.01em;
        }

        .section-header { margin-bottom: 56px; text-align: center; }
        .section-header .section-desc { margin: 0 auto; }

        /* ===== Features Grid ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1px;
            background: var(--border);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .feature-card {
            background: var(--bg-card);
            padding: 32px 28px;
            text-align: center;
            transition: background 0.2s;
            position: relative;
        }
        .feature-card:hover { background: var(--bg-elevated); }

        .feature-card-icon {
            width: 48px; height: 48px;
            margin: 0 auto 16px;
            background: var(--accent-soft);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .feature-card-icon img { width: 28px; height: 28px; }

        .feature-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: -0.01em;
        }
        .feature-card p {
            font-size: 13px;
            color: var(--text-tertiary);
            letter-spacing: -0.01em;
        }

        /* ===== Capability Rows ===== */
        .capability-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
            padding: 40px 0;
        }
        .capability-row + .capability-row { border-top: 1px solid var(--border); }

        .capability-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            background: var(--bg-card);
        }
        .capability-image img { width: 100%; display: block; }

        .capability-tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent);
            background: var(--accent-soft);
            border-radius: 5px;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .capability-text h3 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.025em;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.25;
        }
        .capability-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            letter-spacing: -0.01em;
        }

        .capability-stats {
            display: flex;
            gap: 32px;
            margin-top: 24px;
        }
        .capability-stat {
            text-align: center;
        }
        .capability-stat-value {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.03em;
            color: var(--accent);
        }
        .capability-stat-label {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-top: 4px;
        }

        /* ===== Advantages ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .advantage-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
        }
        .advantage-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .advantage-icon {
            width: 56px; height: 56px;
            margin: 0 auto 20px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s;
        }
        .advantage-card:hover .advantage-icon { transform: scale(1.05); }
        .advantage-icon img { width: 32px; height: 32px; }

        .advantage-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .advantage-card p {
            font-size: 13px;
            color: var(--text-tertiary);
            line-height: 1.6;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--text-primary);
            border-radius: var(--radius-xl);
            text-align: center;
            padding: 72px 40px;
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse 60% 50% at 30% 20%, rgba(232,76,61,0.15) 0%, transparent 60%),
                radial-gradient(ellipse 50% 50% at 70% 80%, rgba(244,114,74,0.1) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-content { position: relative; z-index: 1; }

        .cta h2 {
            font-size: 40px;
            font-weight: 700;
            letter-spacing: -0.03em;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta p {
            font-size: 17px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 36px;
            letter-spacing: -0.01em;
        }
        .cta .btn-primary {
            background: #fff;
            color: var(--text-primary);
            font-size: 15px;
            padding: 14px 36px;
            border-radius: 8px;
        }
        .cta .btn-primary:hover { background: #f0f0f0; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
        .cta-hint {
            display: block;
            margin-top: 14px;
            font-size: 12.5px;
            color: rgba(255,255,255,0.35);
            letter-spacing: -0.01em;
        }

        /* ===== Footer ===== */
        .footer {
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand img { width: 88px; height: 88px; margin-bottom: 12px; }
        .footer-brand p { font-size: 13px; color: var(--text-tertiary); }

        .footer-col h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col a {
            font-size: 13px;
            color: var(--text-tertiary);
            transition: color 0.15s;
            letter-spacing: -0.01em;
        }
        .footer-col a:hover { color: var(--text-primary); }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-tertiary);
            letter-spacing: -0.01em;
        }
        .footer-bottom a { color: var(--text-tertiary); transition: color 0.15s; }
        .footer-bottom a:hover { color: var(--text-primary); }
        .footer-bottom img { display: inline-block; vertical-align: middle; margin-right: 4px; width: 16px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
            .capability-row { grid-template-columns: 1fr; gap: 40px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 40px; }
            .nav-links {
                  flex-wrap: nowrap;
                  overflow-x: auto;
                  -webkit-overflow-scrolling: touch;
                  scrollbar-width: none;
                  max-width: calc(100vw - 120px);
              }
              .nav-links::-webkit-scrollbar { display: none; }
              .nav-links a { padding: 7px 12px; font-size: 13.5px; white-space: nowrap; }
        }

        @media (max-width: 640px) {
            .container { padding: 0 20px; }
            .features-grid { grid-template-columns: 1fr; }
            .advantages-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .hero h1 { font-size: 32px; }
            .hero { padding: 120px 0 60px; }
            .section { padding: 60px 0; }
            .section-title { font-size: 26px; }
            .cta h2 { font-size: 28px; }
            .cta { padding: 48px 24px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        }