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

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: #ffffff;
            color: #1e1e2f;
            line-height: 1.5;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            background-color: #ffffff;
            border-bottom: 1px solid #eaeef2;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background-color: rgba(255, 255, 255, 0.96);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 20px 0;
            gap: 16px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .logo-svg {
            width: 36px;
            height: 36px;
            display: block;
        }

        .logo-text {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: #0a2540;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #2c3e4e;
            transition: color 0.2s;
            font-size: 1rem;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #1c6e8f;
        }

        .lang-switch {
            display: flex;
            gap: 12px;
            border-left: 1px solid #dce5ec;
            padding-left: 24px;
        }

        .lang-switch span {
            font-size: 0.85rem;
            font-weight: 500;
            color: #5a6e7c;
            cursor: default;
        }

        .lang-switch .active-lang {
            color: #1c6e8f;
            font-weight: 600;
        }

        .page-hero {
            background: linear-gradient(145deg, #f3f8fe 0%, #ffffff 100%);
            padding: 56px 0 48px;
            text-align: center;
            border-bottom: 1px solid #e2edf2;
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            color: #0a2540;
            margin-bottom: 16px;
        }

        .page-hero p {
            font-size: 1.2rem;
            color: #3e5a76;
            max-width: 720px;
            margin: 0 auto;
        }

        .guide-nav {
            background: #ffffff;
            border-bottom: 1px solid #eef2f8;
            padding: 20px 0;
            position: sticky;
            top: 81px;
            background-color: rgba(255,255,255,0.98);
            backdrop-filter: blur(4px);
            z-index: 90;
        }

        .guide-nav-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 28px;
            list-style: none;
        }

        .guide-nav-list a {
            text-decoration: none;
            font-weight: 600;
            color: #2c5e7e;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }

        .guide-nav-list a:hover,
        .guide-nav-list a.active-guide {
            color: #1c6e8f;
            border-bottom-color: #1c6e8f;
        }

        .guide-section {
            padding: 64px 0;
            border-bottom: 1px solid #eef2f8;
            scroll-margin-top: 130px;
        }

        .guide-section:last-of-type {
            border-bottom: none;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 48px;
            color: #0a2540;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .steps-grid {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .step-item {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            background: #fafdff;
            padding: 28px;
            border-radius: 28px;
            border: 1px solid #eaf1f7;
            transition: box-shadow 0.2s;
        }

        .step-number {
            width: 56px;
            height: 56px;
            background: #eef3fc;
            border-radius: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 700;
            color: #1c6e8f;
        }

        .step-content {
            flex: 1;
        }

        .step-content h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: #0b3b4f;
        }

        .step-content p {
            color: #3e5a6c;
            margin-bottom: 16px;
        }

        .tip-badge {
            background: #eaf7ef;
            color: #2a6e4b;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            display: inline-block;
            margin-top: 8px;
        }

        .two-columns {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 20px;
        }

        .card-guide {
            flex: 1;
            background: #f9fcfd;
            border-radius: 28px;
            padding: 32px;
            border: 1px solid #e4edf4;
        }

        .card-guide h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: #0f2b3d;
        }

        .card-guide ul {
            padding-left: 20px;
            margin: 16px 0;
        }

        .card-guide li {
            margin: 12px 0;
            color: #2c5c7a;
        }

        .shortcut-table {
            background: white;
            border-radius: 24px;
            overflow: hidden;
            border: 1px solid #e2edf2;
        }

        .shortcut-row {
            display: flex;
            border-bottom: 1px solid #ecf3f8;
        }

        .shortcut-row:last-child {
            border-bottom: none;
        }

        .shortcut-key {
            width: 40%;
            background: #f6fafd;
            padding: 14px 20px;
            font-weight: 600;
            font-family: monospace;
            color: #1c6e8f;
        }

        .shortcut-desc {
            width: 60%;
            padding: 14px 20px;
            color: #2c4e6e;
        }

        .faq-mini {
            background: #f7fafd;
            border-radius: 28px;
            padding: 32px;
            margin-top: 32px;
        }

        .faq-mini details {
            margin-bottom: 20px;
            border-bottom: 1px solid #dee9f0;
            padding-bottom: 16px;
        }

        .faq-mini summary {
            font-weight: 700;
            color: #0a2f44;
            cursor: pointer;
        }

        .site-footer {
            background: #0a1c2a;
            color: #cddfe7;
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-col {
            flex: 1;
            min-width: 150px;
        }

        .footer-col h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: #b9d0df;
            text-decoration: none;
            margin-bottom: 12px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: white;
        }

        .copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #1e3a4a;
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                width: 100%;
                justify-content: space-between;
            }
            .lang-switch {
                border-left: none;
                padding-left: 0;
                margin-top: 8px;
            }
            .step-item {
                flex-direction: column;
            }
            .guide-nav {
                top: 110px;
            }
        }