/* ============================================================
   QsisCms SSG Theme — "Editorial" (Emerald/Teal)
   A clean, magazine-style commercial theme.
   ============================================================ */

:root {
    /* Brand color ramps — emerald */
    --c-primary-50:  #ecfdf5;
    --c-primary-100: #d1fae5;
    --c-primary-200: #a7f3d0;
    --c-primary-300: #6ee7b7;
    --c-primary-400: #34d399;
    --c-primary-500: #10b981;
    --c-primary-600: #059669;
    --c-primary-700: #047857;
    --c-primary-800: #065f46;
    --c-primary-900: #064e3b;

    /* Accent — teal */
    --c-accent-400: #2dd4bf;
    --c-accent-500: #14b8a6;
    --c-accent-600: #0d9488;
    --c-accent-700: #0f766e;

    --c-success-500: #10b981;
    --c-warning-500: #f59e0b;
    --c-error-500:   #ef4444;

    /* Neutral ramp — warm stone */
    --n-50:  #fafaf9;
    --n-100: #f5f5f4;
    --n-200: #e7e5e4;
    --n-300: #d6d3d1;
    --n-400: #a8a29e;
    --n-500: #78716c;
    --n-600: #57534e;
    --n-700: #44403c;
    --n-800: #292524;
    --n-900: #1c1917;

    /* Semantic */
    --text-primary:   #1c1917;
    --text-secondary:  #57534e;
    --text-muted:      #78716c;
    --bg-page:         #ffffff;
    --bg-soft:         #fafaf9;
    --bg-dark:         #1c1917;
    --border-color:    #e7e5e4;
    --border-soft:     #f5f5f4;

    /* Effects */
    --shadow-sm:  0 1px 2px rgba(28,25,23,.04), 0 1px 3px rgba(28,25,23,.06);
    --shadow-md:  0 4px 6px -1px rgba(28,25,23,.06), 0 2px 4px -2px rgba(28,25,23,.06);
    --shadow-lg:  0 12px 24px -6px rgba(28,25,23,.10), 0 8px 16px -8px rgba(28,25,23,.08);
    --shadow-xl:  0 24px 48px -12px rgba(28,25,23,.16);
    --shadow-green: 0 8px 24px -6px rgba(5,150,105,.30);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition: .3s cubic-bezier(.4,0,.2,1);
    --transition-fast: .18s cubic-bezier(.4,0,.2,1);

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-serif: "Georgia", "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Sans Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-page);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================
   Navigation
   ============================================================ */
.site-header {
    position: relative;
    z-index: 1000;
    background: rgba(255,255,255,.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border-soft);
    transition: all var(--transition);
}
.site-header.header-fixed {
    position: fixed;
    top: 0; left: 0; right: 0;
    box-shadow: var(--shadow-md);
}
.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 68px;
}
.brand a {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -.02em;
    color: var(--c-primary-700);
    transition: opacity var(--transition-fast);
}
.brand a:hover { opacity: .75; }

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav ul {
    display: flex !important;
    gap: 4px;
    align-items: center;
}
.main-nav li { display: inline-block; }
.main-nav a {
    position: relative;
    display: inline-block;
    color: var(--text-secondary);
    font-size: .95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 16px; right: 16px; bottom: 4px;
    height: 2px;
    background: var(--c-primary-600);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
}
.main-nav a:hover {
    color: var(--c-primary-600);
    background: var(--c-primary-50);
}
.main-nav a:hover::after { transform: scaleX(1); }

.nav-cta {
    margin-left: 12px;
    padding: 8px 20px !important;
    background: var(--c-primary-600);
    color: #fff !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(5,150,105,.25);
    transition: all var(--transition-fast);
}
.nav-cta::after { display: none; }
.nav-cta:hover {
    background: var(--c-primary-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(5,150,105,.35);
}

/* Mobile menu toggle */
.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-primary);
    border-radius: 2px;
    transition: all var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero — editorial split layout
   ============================================================ */
.hero-section {
    position: relative;
    padding: 100px 0 72px;
    overflow: hidden;
    background:
        linear-gradient(180deg, var(--c-primary-50) 0%, transparent 100%);
}
.hero-section::before {
    content: "";
    position: absolute;
    top: 0; right: 0;
    width: 50%; height: 100%;
    background: radial-gradient(ellipse at top right, rgba(20,184,166,.10), transparent 70%);
    pointer-events: none;
}
.hero-section .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}
.hero-content { max-width: 580px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: #fff;
    border: 1px solid var(--c-primary-200);
    border-radius: var(--radius-full);
    color: var(--c-primary-700);
    font-size: .85rem;
    font-weight: 600;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}
.hero-badge .dot {
    width: 8px; height: 8px;
    background: var(--c-success-500);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(16,185,129,.2);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%,100% { box-shadow: 0 0 0 3px rgba(16,185,129,.2); }
    50% { box-shadow: 0 0 0 6px rgba(16,185,129,.08); }
}

.hero-section h1 {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -.03em;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--n-900);
}
.hero-section h1 .accent {
    color: var(--c-primary-600);
}
.hero-section p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero visual — floating cards */
.hero-visual {
    position: relative;
    height: 360px;
}
.hero-card {
    position: absolute;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.hero-card-1 {
    top: 0; right: 20px;
    width: 75%; height: 70%;
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-accent-500));
    display: flex;
    align-items: flex-end;
    padding: 24px;
    color: #fff;
}
.hero-card-1 .label {
    font-size: .8rem;
    opacity: .85;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.hero-card-1 .value {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.1;
}
.hero-card-2 {
    bottom: 0; left: 0;
    width: 55%; height: 45%;
    background: #fff;
    border: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.hero-card-2 .mini-label {
    font-size: .78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 6px;
}
.hero-card-2 .mini-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--n-900);
}
.hero-card-2 .bar {
    margin-top: 12px;
    height: 6px;
    background: var(--n-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.hero-card-2 .bar-fill {
    width: 78%;
    height: 100%;
    background: linear-gradient(90deg, var(--c-primary-500), var(--c-accent-500));
    border-radius: var(--radius-full);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: .98rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--c-primary-600);
    color: #fff;
    box-shadow: var(--shadow-green);
}
.btn-primary:hover {
    background: var(--c-primary-700);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -6px rgba(5,150,105,.40);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
    background: transparent;
    color: var(--c-primary-700);
    border: 1.5px solid var(--c-primary-200);
}
.btn-outline:hover {
    background: var(--c-primary-50);
    border-color: var(--c-primary-300);
    transform: translateY(-2px);
}
.btn-ghost {
    background: var(--n-100);
    color: var(--n-700);
}
.btn-ghost:hover { background: var(--n-200); }

/* ============================================================
   Logo strip
   ============================================================ */
.logo-strip {
    padding: 40px 0;
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
}
.logo-strip .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}
.logo-strip .label {
    font-size: .85rem;
    color: var(--text-muted);
    font-weight: 600;
}
.logo-strip .logos {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    align-items: center;
}
.logo-strip .logos span {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--n-400);
    transition: color var(--transition-fast);
}
.logo-strip .logos span:hover { color: var(--n-700); }


/* ============================================================
   Sections
   ============================================================ */
.section { padding: 80px 0; }
.section-gray { background: var(--bg-soft); }
.section-dark {
    background: var(--bg-dark);
    color: #fff;
}

.section-title {
    text-align: center;
    margin-bottom: 56px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.section-title h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -.02em;
    margin-bottom: 14px;
}
.section-title p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}
.section-title .eyebrow {
    display: inline-block;
    color: var(--c-primary-600);
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: 12px;
}

/* ============================================================
   Feature cards — bordered editorial style
   ============================================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.feature-card {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    background: #fff;
    overflow: hidden;
}
.feature-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c-primary-600), var(--c-accent-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px; height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-primary-50), var(--c-primary-100));
    color: var(--c-primary-600);
    margin-bottom: 20px;
    transition: all var(--transition);
}
.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-accent-500));
    color: #fff;
    transform: scale(1.05);
}
.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--n-900);
}
.feature-card p {
    color: var(--text-secondary);
    font-size: .98rem;
}

/* ============================================================
   Steps / Process
   ============================================================ */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    position: relative;
}
.step-card {
    text-align: center;
    padding: 24px;
}
.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px; height: 64px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--c-primary-200);
    color: var(--c-primary-600);
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 20px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}
.step-card:hover .step-num {
    background: var(--c-primary-600);
    color: #fff;
    border-color: var(--c-primary-600);
    transform: translateY(-4px);
    box-shadow: var(--shadow-green);
}
.step-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.step-card p { color: var(--text-secondary); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    background: #fff;
    overflow: hidden;
    transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-md); }
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--n-900);
    cursor: pointer;
    list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--c-primary-600);
    transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--c-primary-50); }
.faq-item .faq-answer {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================================
   Article / Blog list
   ============================================================ */
.list-wrap { padding: 80px 0; }

.list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}
.list-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    background: #fff;
    transition: all var(--transition);
}
.list-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.list-card a {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--n-900);
    line-height: 1.4;
    transition: color var(--transition-fast);
}
.list-card a:hover { color: var(--c-primary-600); }
.list-card .excerpt {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: .95rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.list-card .date {
    font-size: .85rem;
    color: var(--text-muted);
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Legacy list-item (list.php) */
.list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-soft);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}
.list-item:hover {
    background: var(--bg-soft);
    padding-left: 32px;
}
.list-item a {
    position: relative;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--n-800);
}
.list-item a::after {
    content: "";
    position: absolute;
    left: 0; bottom: -3px;
    height: 2px; width: 0;
    background: var(--c-primary-600);
    transition: width var(--transition);
}
.list-item a:hover { color: var(--c-primary-600); }
.list-item a:hover::after { width: 100%; }
.list-item .date {
    font-size: .85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.pagination {
    margin-top: 48px;
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}
.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px; height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}
.pagination a:hover {
    background: var(--c-primary-600);
    color: #fff;
    border-color: var(--c-primary-600);
}
.pagination .current {
    background: var(--c-primary-600);
    color: #fff;
    border-color: var(--c-primary-600);
}

/* ============================================================
   CTA banner
   ============================================================ */
.cta-banner {
    margin: 80px 0;
    padding: 64px 40px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--c-primary-800), var(--c-primary-600) 50%, var(--c-accent-600));
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255,255,255,.12), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,.08), transparent 40%);
}
.cta-banner .container { position: relative; z-index: 1; }
.cta-banner h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.cta-banner p {
    font-size: 1.1rem;
    opacity: .9;
    margin-bottom: 28px;
}
.cta-banner .btn-primary {
    background: #fff;
    color: var(--c-primary-700);
    box-shadow: 0 8px 24px rgba(0,0,0,.15);
}
.cta-banner .btn-primary:hover { background: var(--n-100); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--bg-dark);
    color: var(--n-400);
    padding: 64px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand .brand-name {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--c-primary-400);
    margin-bottom: 16px;
    display: inline-block;
}
.footer-brand p {
    color: var(--n-400);
    font-size: .95rem;
    line-height: 1.8;
    max-width: 320px;
}
.footer-col h4 {
    color: #fff;
    font-size: .95rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
    color: var(--n-400);
    font-size: .92rem;
    transition: color var(--transition-fast);
}
.footer-col ul li a:hover { color: var(--c-primary-400); }

.footer-bottom {
    border-top: 1px solid var(--n-800);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: .88rem;
}
.footer-bottom p { color: var(--n-500); }

/* ============================================================
   Article detail
   ============================================================ */
.article-wrap {
    max-width: 960px;
    margin: 56px auto 80px;
    padding: 0 24px;
}
.article-title {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.3;
    color: var(--n-900);
    margin-bottom: 16px;
}
.article-meta {
    color: var(--text-muted);
    font-size: .92rem;
    margin-bottom: 36px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.article-content {
    font-size: 1.08rem;
    line-height: 1.85;
    color: var(--n-800);
}
.article-content p { margin-bottom: 1.3rem; }
.article-content a { color: var(--c-primary-600); text-decoration: underline; }
.article-content h2, .article-content h3, .article-content h4 {
    margin-top: 2.2rem; margin-bottom: .8rem;
    font-weight: 700;
    color: var(--n-900);
}
.article-content code {
    font-family: var(--font-mono);
    background: var(--n-100);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: .9em;
}
.article-content pre {
    background: var(--n-900);
    color: var(--n-200);
    padding: 20px 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1.5rem 0;
}
.article-content pre code { background: none; padding: 0; }
.article-content blockquote {
    border-left: 4px solid var(--c-primary-500);
    padding: 12px 20px;
    margin: 1.5rem 0;
    background: var(--c-primary-50);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}
.article-content img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    display: block;
    max-width: 100%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}

.article-tags {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-soft);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.article-tags a {
    padding: 6px 14px;
    background: var(--n-100);
    border-radius: var(--radius-full);
    font-size: .85rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}
.article-tags a:hover {
    background: var(--c-primary-600);
    color: #fff;
}

/* ============================================================
   Tag cloud
   ============================================================ */
.tags-wrap { padding: 80px 0; max-width: 900px; margin: 0 auto; }
.tag-cloud {
    display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px;
}
.tag-cloud a {
    padding: 8px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: .92rem;
    transition: all var(--transition-fast);
}
.tag-cloud a:hover {
    background: var(--c-primary-600);
    color: #fff;
    border-color: var(--c-primary-600);
    transform: translateY(-2px);
    box-shadow: var(--shadow-green);
}

/* 404 */
.page-404 { text-align: center; padding: 120px 20px; }
.page-404 h1 {
    font-size: 6rem; font-weight: 800;
    color: var(--c-primary-600);
}

/* ============================================================
   Reveal-on-scroll animation
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-section .container { grid-template-columns: 1fr; }
    .hero-visual { height: 280px; margin-top: 32px; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 68px; left: 0; right: 0;
        background: #fff;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: transform var(--transition);
        z-index: 999;
        flex-direction: column;   /* 追加 */
    align-items: stretch;     /* 追加 */
    }
    .main-nav.open { transform: translateY(0); }
    .main-nav ul {
        flex-direction: column;
        gap: 4px;
        align-items: stretch;
    }
    .main-nav li { display: block; }
    .main-nav a { display: block; padding: 12px 16px; }
    .main-nav a::after { display: none; }
    .nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }

    .hero-section { padding: 80px 0 56px; }
    .hero-section .container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }

    .section { padding: 56px 0; }
    .features-grid { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }

    .cta-banner { padding: 40px 24px; margin: 48px 0; }
    .cta-banner h2 { font-size: 1.6rem; }

    .list-item { flex-direction: column; align-items: flex-start; gap: 8px; }
    .list-grid { grid-template-columns: 1fr; }

    .logo-strip .container { flex-direction: column; text-align: center; }
    .logo-strip .logos { justify-content: center; }
}