/* =========================================
   Wise-BJ — Corporate Website Styles v2
   ========================================= */

:root {
    --color-bg: #fafaf8;
    --color-surface: #f3f3ee;
    --color-surface-2: #ececdf;
    --color-ink: #0a0a0a;
    --color-ink-soft: #3d3d3d;
    --color-ink-soft-2: #5a5a5a;
    --color-muted: #8a8a8a;
    --color-line: #e6e6e0;
    --color-line-soft: #efefe8;
    --color-accent: #1f3a2e;
    --color-accent-soft: #e8efe9;
    --color-accent-bright: #5fa777;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
        sans-serif;
    --font-serif: "Noto Serif SC", "Songti SC", "STSong", Georgia,
        "Times New Roman", serif;
    --font-mono: "SF Mono", "Menlo", "Consolas", "Liberation Mono", monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --max-width: 1200px;
}

/* --- Reset / base --- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }

body {
    font-family: var(--font-sans);
    color: var(--color-ink);
    background: var(--color-bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "kern", "liga";
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
a:hover { opacity: 0.72; }

h1, h2, h3, h4, h5, h6 { font-weight: 500; }
p { margin: 0 0 1em; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 32px;
}

/* --- Utility --- */
.eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin: 0 0 20px;
    font-weight: 600;
}
.lead {
    font-size: 1.18rem;
    color: var(--color-ink-soft);
    line-height: 1.75;
    max-width: 56ch;
    margin: 0;
}
.kicker {
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-muted);
    font-weight: 600;
    margin: 0 0 10px;
}

/* --- Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(250, 250, 248, 0.88);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-line);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 32px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--color-ink);
    text-decoration: none;
    flex-shrink: 0;
}
.brand:hover { opacity: 1; }
.brand-mark {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    color: inherit;
}
.brand-word { line-height: 1; }
.brand-dot {
    color: var(--color-accent);
    margin: 0 2px;
    font-weight: 400;
}
.brand-lg { font-size: 1.5rem; gap: 12px; }
.brand-lg .brand-mark { width: 34px; height: 34px; }

.nav {
    display: flex;
    gap: 28px;
    font-size: 0.92rem;
    color: var(--color-ink-soft);
    flex-wrap: wrap;
    justify-content: flex-end;
}
.nav a {
    position: relative;
    padding: 4px 0;
    color: var(--color-ink-soft);
}
.nav a:hover { color: var(--color-ink); opacity: 1; }
.nav a[aria-current="page"] {
    color: var(--color-ink);
    font-weight: 600;
}
.nav a[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -6px;
    height: 2px;
    background: var(--color-accent);
}

/* --- Hero (home) --- */
.hero {
    position: relative;
    padding: 56px 0 88px;
    background:
        radial-gradient(ellipse at 80% -10%, var(--color-accent-soft), transparent 50%),
        var(--color-bg);
    overflow: hidden;
}
.hero-deco { display: none; }
.hero-eyebrow { position: relative; z-index: 1; }
.hero-title {
    position: relative;
    z-index: 1;
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4.4vw, 3.4rem);
    line-height: 1.18;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin: 0 0 22px;
    color: var(--color-ink);
    max-width: 22ch;
}
.hero-sub {
    position: relative;
    z-index: 1;
    font-size: 1.1rem;
    color: var(--color-ink-soft);
    max-width: 46ch;
    margin: 0 0 28px;
    line-height: 1.75;
}
.hero-actions {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

/* --- Page hero (inner pages) --- */
.page-hero {
    position: relative;
    padding: 80px 0 64px;
    background:
        radial-gradient(ellipse at 50% -20%, var(--color-accent-soft), transparent 55%),
        var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    overflow: hidden;
    text-align: center;
}
.page-hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4.6vw, 3.2rem);
    line-height: 1.2;
    font-weight: 500;
    margin: 0 auto 22px;
    letter-spacing: -0.005em;
    max-width: 22ch;
}
.page-hero .lead {
    margin-left: auto;
    margin-right: auto;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.18s ease;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn-primary { background: var(--color-ink); color: #fff; }
.btn-primary:hover { opacity: 1; background: var(--color-accent); }
.btn-ghost {
    color: var(--color-ink);
    border-color: var(--color-line);
    background: transparent;
}
.btn-ghost:hover { opacity: 1; border-color: var(--color-ink); }
.btn-link {
    color: var(--color-accent);
    padding: 6px 0;
    font-weight: 500;
    border-bottom: 1px solid currentColor;
    border-radius: 0;
    gap: 4px;
}
.btn-link:hover { opacity: 1; color: var(--color-ink); }

/* --- Section --- */
.section {
    padding: 108px 0;
    border-top: 1px solid var(--color-line);
}
.section:first-of-type { border-top: none; }
.section-surface {
    background: var(--color-surface);
    border-top: 1px solid var(--color-line);
}

.section-head {
    max-width: 720px;
    margin: 0 0 64px;
}
.section-head h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.85rem, 3.4vw, 2.6rem);
    font-weight: 500;
    line-height: 1.25;
    margin: 0 0 20px;
    letter-spacing: -0.005em;
}

/* --- Numbered editorial list --- */
.num-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.num-list > li {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 40px;
    padding: 36px 0;
    border-top: 1px solid var(--color-line);
}
.num-list > li:last-child { border-bottom: 1px solid var(--color-line); }
.num-list .num {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    color: var(--color-accent);
    font-weight: 600;
    padding-top: 8px;
}
.num-list .num-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 10px;
    line-height: 1.35;
}
.num-list .num-body p {
    color: var(--color-ink-soft);
    margin: 0 0 12px;
    max-width: 64ch;
    font-size: 1rem;
    line-height: 1.7;
}
.num-list .num-body p:last-child { margin-bottom: 0; }

/* --- Pillars --- */
.pillars {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}
.pillars li {
    padding-top: 22px;
    border-top: 1px solid var(--color-line);
}
.pillars .pillar-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 0.14em;
    margin-bottom: 14px;
}
.pillars h3 {
    font-size: 1.1rem;
    margin: 0 0 10px;
    font-weight: 600;
    line-height: 1.4;
}
.pillars p {
    font-size: 0.94rem;
    color: var(--color-ink-soft);
    margin: 0;
    line-height: 1.65;
}

/* --- Department block (technology page) --- */
.dept {
    padding: 56px 0;
    border-top: 1px solid var(--color-line);
}
.dept:last-child { border-bottom: 1px solid var(--color-line); }
.dept-inner {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 48px;
}
.dept-num {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    color: var(--color-accent);
    font-weight: 600;
    padding-top: 10px;
}
.dept-content h3 {
    font-family: var(--font-serif);
    font-size: clamp(1.45rem, 2.6vw, 1.9rem);
    font-weight: 500;
    margin: 0 0 12px;
    line-height: 1.3;
}
.dept-tagline {
    font-size: 1.05rem;
    color: var(--color-ink-soft);
    margin: 0 0 24px;
    max-width: 68ch;
    line-height: 1.7;
}

/* --- Definition-style rows --- */
.dl-grid {
    margin: 20px 0 0;
    display: grid;
    gap: 18px;
}
.dl-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 24px;
    align-items: start;
}
.dl-row dt {
    font-size: 0.74rem;
    letter-spacing: 0.18em;
    color: var(--color-muted);
    text-transform: uppercase;
    font-weight: 600;
    padding-top: 4px;
}
.dl-row dd {
    margin: 0;
    color: var(--color-ink-soft);
    font-size: 0.98rem;
    line-height: 1.75;
}

/* --- Solution block --- */
.solution {
    padding: 76px 0;
    border-top: 1px solid var(--color-line);
}
.solution:last-child { border-bottom: 1px solid var(--color-line); }
.solution-inner {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 72px;
    align-items: start;
}
.solution-head .kicker { margin-bottom: 14px; }
.solution-head h3 {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 500;
    margin: 0 0 20px;
    line-height: 1.25;
}
.solution-head p {
    color: var(--color-ink-soft);
    font-size: 1.02rem;
    max-width: 52ch;
    line-height: 1.75;
    margin: 0;
}
.solution-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.solution-list li {
    padding: 20px 0;
    border-top: 1px solid var(--color-line);
}
.solution-list li:last-child { border-bottom: 1px solid var(--color-line); }
.solution-list h4 {
    font-size: 1.04rem;
    font-weight: 600;
    margin: 0 0 6px;
    line-height: 1.45;
}
.solution-list p {
    font-size: 0.94rem;
    color: var(--color-ink-soft);
    margin: 0;
    line-height: 1.65;
}

/* --- Case grid --- */
.case-group { margin-bottom: 76px; }
.case-group:last-child { margin-bottom: 0; }
.case-group-head {
    display: flex;
    align-items: baseline;
    gap: 20px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-line);
}
.case-group-head .num {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    color: var(--color-accent);
    font-weight: 600;
}
.case-group-head h3 {
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.4vw, 1.75rem);
    font-weight: 500;
    margin: 0;
    line-height: 1.3;
}
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: 28px 26px 30px;
    transition: border-color 0.18s ease, transform 0.18s ease,
        box-shadow 0.18s ease;
    display: flex;
    flex-direction: column;
}
.case-card:hover {
    border-color: var(--color-ink);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px -8px rgba(0,0,0,0.12);
}
.case-card .case-num {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    color: var(--color-accent-bright);
    font-weight: 600;
    margin-bottom: 16px;
}
.case-card h4 {
    font-size: 1.06rem;
    font-weight: 600;
    margin: 0 0 12px;
    line-height: 1.45;
    color: var(--color-ink);
}
.case-card p {
    font-size: 0.92rem;
    color: var(--color-ink-soft);
    line-height: 1.7;
    margin: 0;
}

/* --- Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 72px;
    align-items: start;
}
.contact-card {
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: 36px 34px;
}
.contact-card + .contact-card { margin-top: 20px; }
.contact-card h3 {
    font-size: 0.76rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-muted);
    font-weight: 600;
    margin: 0 0 16px;
}
.contact-card .value {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2.2vw, 1.55rem);
    font-weight: 500;
    margin: 0;
    line-height: 1.5;
    word-break: break-word;
}
.contact-card .value a {
    color: var(--color-ink);
    border-bottom: 1px solid var(--color-line);
    padding-bottom: 2px;
}
.contact-card .value a:hover { opacity: 1; border-color: var(--color-accent); }
.contact-card .note {
    font-size: 0.93rem;
    color: var(--color-ink-soft);
    margin: 18px 0 0;
    line-height: 1.65;
}
.contact-meta h3 {
    font-family: var(--font-serif);
    font-size: clamp(1.35rem, 2.6vw, 1.75rem);
    font-weight: 500;
    margin: 0 0 18px;
}
.contact-meta p {
    color: var(--color-ink-soft);
    font-size: 1rem;
    line-height: 1.75;
    max-width: 44ch;
}

/* --- CTA band --- */
.cta-band {
    padding: 92px 0;
    background: var(--color-ink);
    color: #e8e8e4;
    text-align: center;
}
.cta-band .eyebrow { color: var(--color-accent-bright); }
.cta-band h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.7rem, 3.2vw, 2.4rem);
    color: #fff;
    max-width: 28ch;
    margin: 0 auto 20px;
    line-height: 1.3;
    font-weight: 500;
}
.cta-band p {
    color: #bcbcb5;
    max-width: 48ch;
    margin: 0 auto 32px;
    font-size: 1.02rem;
    line-height: 1.75;
}
.cta-band .btn-primary { background: #fff; color: var(--color-ink); }
.cta-band .btn-primary:hover { background: var(--color-accent-bright); color: #fff; }
.cta-band .btn-ghost {
    color: #fff;
    border-color: rgba(255,255,255,0.25);
}
.cta-band .btn-ghost:hover { border-color: #fff; }

/* --- Footer --- */
.footer {
    background: var(--color-ink);
    color: #e8e8e4;
    padding: 88px 0 28px;
}
.footer .brand { color: #fff; }
.footer .brand-mark { color: #fff; }
.footer .brand-dot { color: #a8c5b3; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 56px;
    padding-bottom: 56px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-tag {
    color: #a8a8a0;
    margin: 18px 0 0;
    font-size: 0.94rem;
    line-height: 1.55;
}
.footer-col h4 {
    font-size: 0.76rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: #a8a8a0;
    font-weight: 600;
    margin: 0 0 18px;
}
.footer-col p {
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: #e8e8e4;
    line-height: 1.65;
}
.footer-col a { color: #fff; border-bottom: 1px solid transparent; }
.footer-col a:hover { opacity: 1; border-color: #a8c5b3; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 28px;
    font-size: 0.83rem;
    color: #8a8a82;
}

/* --- Responsive --- */
@media (max-width: 960px) {
    .solution-inner { grid-template-columns: 1fr; gap: 36px; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 820px) {
    .container { padding: 0 24px; }
    .header-inner {
        height: auto;
        flex-wrap: wrap;
        padding: 14px 0;
        gap: 10px 20px;
    }
    .nav {
        width: 100%;
        justify-content: flex-start;
        gap: 16px 20px;
        font-size: 0.86rem;
    }

    .hero { padding: 32px 0 56px; }
    .page-hero { padding: 56px 0 44px; }

    .section { padding: 72px 0; }
    .section-head { margin-bottom: 44px; }

    .num-list > li {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 28px 0;
    }

    .pillars { grid-template-columns: 1fr; gap: 24px; }

    .dept-inner { grid-template-columns: 1fr; gap: 14px; }
    .dl-row { grid-template-columns: 1fr; gap: 4px; }
    .dl-row dt { padding-top: 6px; }

    .cta-band { padding: 64px 0; }

    .footer-grid { grid-template-columns: 1fr; gap: 36px; padding-bottom: 36px; }
    .footer-bottom { flex-direction: column; gap: 6px; }
}

@media (max-width: 560px) {
    .case-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { justify-content: center; }
    .case-group-head { flex-direction: column; gap: 6px; align-items: flex-start; }
    .contact-card { padding: 28px 24px; }
}