@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    --bihui:        #0098A7;
    --bihui-soft:   rgba(0,152,167,.08);
    --bihui-rim:    rgba(0,152,167,.28);
    --bihui-deep:   #007885;
    --bihui-tick:   rgba(0,152,167,.18);
    --bihui-mono:   "IBM Plex Mono", ui-monospace, monospace;
    --bihui-section-y: clamp(2.25rem, 7vw, 6rem);
    --bihui-head-gap:  clamp(2rem, 5vw, 3.5rem);
}

.bihui-page .cap {
    font-family: var(--bihui-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.bihui-page .cap--accent { color: var(--bihui); }

.bihui-page h1, .bihui-page h2, .bihui-page h3 {
    font-family: "Merriweather", Georgia, serif;
    color: var(--text-strong);
    letter-spacing: -0.018em;
}

.bihui-hero { padding: clamp(2.5rem, 7vw, 6rem) 0 clamp(2rem, 6vw, 5rem); }

.bihui-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: start;
}
@media (max-width: 768px) {
    .bihui-hero { padding: calc(55px + 1rem) 0 1rem; }
    .bihui-hero-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.bihui-hero-text {
    display: flex;
    flex-direction: column;
    max-width: 61.25rem;
    min-width: 0;
}

.bihui-hero-logo {
    display: inline-flex;
    align-items: center;
    line-height: 0;
    padding-top: 0.625rem;
}
.bihui-hero-logo .brand-logo {
    height: 2.75rem;
    width: auto;
    max-width: 12.5rem;
    object-fit: contain;
    display: block;
}
.bihui-hero-logo .brand-logo-on-light { display: none; }
.bihui-hero-logo .brand-logo-on-dark { display: block; }
[data-bs-theme="light"] .bihui-hero-logo .brand-logo-on-light { display: block; }
[data-bs-theme="light"] .bihui-hero-logo .brand-logo-on-dark { display: none; }

@media (max-width: 768px) {
    .bihui-hero-logo {
        order: -1;
        padding-top: 0;
        align-self: flex-start;
    }
    .bihui-hero-logo .brand-logo { height: 2.25rem; }
}

.bihui-hero-text h1 {
    font-family: "Merriweather", Georgia, serif;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.028em;
    margin: 0 0 clamp(1.25rem, 3vw, 1.75rem);
    max-width: 22ch;
}
.bihui-hero-text .lede {
    font-family: "Inter", sans-serif;
    font-size: clamp(1rem, 1.2vw, 1.18rem);
    line-height: 1.65;
    color: var(--text-muted);
    margin: 0 0 clamp(2rem, 5vw, 3rem);
    max-width: 60ch;
}

.bihui-hero-ruler {
    margin-top: clamp(2rem, 5vw, 3.5rem);
    height: 1.5rem;
    background-image:
        linear-gradient(to right, var(--bihui-tick) 1px, transparent 1px),
        linear-gradient(to right, var(--border-soft) 1px, transparent 1px);
    background-size: 5rem 100%, 1.25rem 100%;
    background-position: 0 100%, 0 100%;
    background-repeat: repeat-x, repeat-x;
    position: relative;
}
.bihui-hero-ruler::after {
    content: "CH · 2026";
    position: absolute;
    right: 0;
    top: 0;
    font-family: var(--bihui-mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.15em;
}

.bihui-section { padding: var(--bihui-section-y) 0; }
.bihui-section--alt { background: var(--surface-2); }
.bihui-section-head { margin-bottom: var(--bihui-head-gap); max-width: 45rem; }
.bihui-section-head .cap { display: block; margin-bottom: 1rem; }
.bihui-section-head h2 {
    font-family: "Merriweather", Georgia, serif;
    font-size: clamp(2rem, 3.6vw, 3.2rem);
    font-weight: 700;
    line-height: 1.1;
    margin: 0 0 1.25rem;
    max-width: 16ch;
    color: var(--text-strong);
}
.bihui-section-head .lede {
    font-family: "Inter", sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin: 0;
    max-width: 56ch;
}

.bihui-why-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(2.5rem, 5vw, 3.5rem) clamp(2rem, 4vw, 3rem);
}
@media (max-width: 900px) {
    .bihui-why-list { grid-template-columns: 1fr; gap: 2.5rem; }
}

.bihui-why-item {
    display: grid;
    grid-template-columns: 4rem minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}
.bihui-why-num {
    font-family: var(--bihui-mono);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--bihui);
    padding-top: 0.5rem;
    border-top: 2px solid var(--bihui);
    display: inline-block;
}
.bihui-why-title {
    font-family: "Merriweather", Georgia, serif;
    font-weight: 700;
    font-size: 1.25rem;
    line-height: 1.3;
    color: var(--text-strong);
    margin: 0 0 0.875rem;
    max-width: 24ch;
}
.bihui-why-desc {
    font-family: "Inter", sans-serif;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin: 0;
    max-width: 54ch;
}

.bihui-cat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    counter-reset: catCounter;
}
@media (max-width: 900px) {
    .bihui-cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .bihui-cat-grid { grid-template-columns: 1fr; }
}

.bihui-cat {
    padding: 2rem 1.75rem 2rem 0;
    border-bottom: 1px solid var(--border-soft);
    position: relative;
    transition: padding-left .25s ease;
}
.bihui-cat:not(:nth-child(3n)) { padding-right: 2rem; }
.bihui-cat:nth-child(1),
.bihui-cat:nth-child(2),
.bihui-cat:nth-child(3) { border-top: 1px solid var(--border-soft); }
.bihui-cat::before {
    content: counter(catCounter, decimal-leading-zero);
    counter-increment: catCounter;
    font-family: var(--bihui-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: var(--text-dim);
    position: absolute;
    top: 2rem;
    right: 1rem;
}
.bihui-cat-icon {
    color: var(--bihui);
    font-size: 1.5rem;
    margin-bottom: 1.125rem;
    display: block;
}
.bihui-cat-title {
    font-family: "Merriweather", Georgia, serif;
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1.25;
    color: var(--text-strong);
    margin: 0 0 0.625rem;
    max-width: 22ch;
}
.bihui-cat-desc {
    font-family: "Inter", sans-serif;
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin: 0;
    max-width: 38ch;
}
.bihui-cat:hover { padding-left: 0.75rem; }
.bihui-cat:hover .bihui-cat-icon { color: var(--bihui-deep); }

.bihui-photo-zone {
    position: relative;
    aspect-ratio: 21/9;
    background: var(--surface-2);
    overflow: hidden;
}
@media (max-width: 900px) {
    .bihui-photo-zone { aspect-ratio: 4/5; }
}
.bihui-photo-zone img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.65);
}
.bihui-photo-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 3vw, 1.5rem);
}
.bihui-photo-card {
    background: #0A0A0A;
    color: #fff;
    padding: clamp(1.75rem, 4vw, 3.5rem) clamp(1.375rem, 5vw, 4.5rem);
    border-radius: 0.375rem;
    box-shadow:
        0 1px 3px rgba(0,0,0,.08),
        0 8px 24px rgba(0,0,0,.10);
    max-width: 45rem;
    text-align: center;
}
.bihui-photo-card .cap {
    color: var(--bihui);
    margin-bottom: 1.25rem;
    display: block;
}
.bihui-photo-card-quote {
    font-family: "Merriweather", Georgia, serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.3rem, 2.4vw, 1.8rem);
    line-height: 1.4;
    margin: 0 0 1.5rem;
}
.bihui-photo-card-stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(1.5rem, 4vw, 3.5rem);
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,.15);
}
.bihui-photo-card-stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.bihui-photo-card-stat-n {
    font-family: "Merriweather", Georgia, serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: var(--bihui);
    line-height: 1;
}
.bihui-photo-card-stat-l {
    font-family: var(--bihui-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255,255,255,.7);
}

.bihui-distribution-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 6rem);
    align-items: center;
}
@media (max-width: 900px) {
    .bihui-distribution-grid { grid-template-columns: 1fr; }
}
.bihui-dist-numbers {
    display: flex;
    flex-direction: column;
    gap: clamp(1.5rem, 4vw, 2rem);
}
.bihui-dist-num {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-soft);
}
.bihui-dist-num:last-child { border-bottom: 0; }
.bihui-dist-num-n {
    font-family: "Merriweather", Georgia, serif;
    font-weight: 700;
    font-size: clamp(2.4rem, 4.4vw, 3.8rem);
    color: var(--bihui);
    line-height: 1;
    letter-spacing: -0.02em;
}
.bihui-dist-num-l {
    font-family: "Inter", sans-serif;
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

@media (max-width: 640px) {
    .bihui-dist-num {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding-bottom: 1.25rem;
    }
    .bihui-dist-num-n {
        min-width: 0;
        font-size: clamp(2rem, 8vw, 2.6rem);
    }
}

.bihui-map-wrap {
    position: relative;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    border-radius: 0.375rem;
    padding: clamp(1.75rem, 4vw, 2rem) clamp(1rem, 4vw, 1.5rem) 1.25rem;
    display: flex;
    flex-direction: column;
}
.bihui-map-wrap::before {
    content: "FIG. 01 · SCHWEIZ";
    position: absolute;
    top: 0.875rem;
    left: 1.125rem;
    font-family: var(--bihui-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--text-dim);
}
.bihui-map-wrap .swiss-map-container { margin: 1rem 0 0.5rem; }
.bihui-map-wrap .bihui-pins-svg .canton-pin-hq .hq-pulse {
    transform-origin: center;
    animation: bihui-hq-pulse 2.4s ease-in-out infinite;
}
@keyframes bihui-hq-pulse {
    0%, 100% { r: 9; opacity: .30; }
    50%      { r: 16; opacity: .08; }
}
.bihui-map-caption {
    margin: 1rem 0 0;
    font-family: var(--bihui-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    line-height: 1.5;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-soft);
}

.bihui-cta-section {
    background: #0A0A0A;
    color: #fff;
    padding: clamp(3.5rem, 10vw, 8.75rem) 0;
    position: relative;
}
.bihui-cta-section .cap {
    color: var(--bihui);
    margin-bottom: 1.25rem;
    display: block;
}
.bihui-cta-section h2 {
    font-family: "Merriweather", Georgia, serif;
    font-size: clamp(2rem, 4vw, 3.6rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.02em;
    color: #fff;
    margin: 0 0 1.5rem;
    max-width: 18ch;
}
.bihui-cta-section .lede {
    font-family: "Inter", sans-serif;
    font-size: 1.05rem;
    color: rgba(255,255,255,.75);
    line-height: 1.6;
    max-width: 52ch;
    margin: 0 0 2.5rem;
}
.bihui-cta-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.125rem 2rem;
    background: var(--bihui);
    color: #fff;
    text-decoration: none;
    font-family: "Inter", sans-serif;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 0.375rem;
    transition: background .25s ease, transform .25s ease;
}
.bihui-cta-primary:hover {
    background: var(--bihui-deep);
    color: #fff;
    transform: translateX(0.25rem);
}
.bihui-cta-secondary-row {
    margin-top: 1.75rem;
    display: flex;
    gap: clamp(1rem, 3vw, 1.75rem);
    flex-wrap: wrap;
    padding-top: 1.75rem;
    border-top: 1px solid rgba(255,255,255,.12);
}
.bihui-cta-secondary {
    color: rgba(255,255,255,.85);
    text-decoration: none;
    font-family: "Inter", sans-serif;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    transition: color .25s ease;
}
.bihui-cta-secondary .arrow {
    color: var(--bihui);
    transition: transform .25s ease;
}
.bihui-cta-secondary:hover { color: #fff; }
.bihui-cta-secondary:hover .arrow { transform: translateX(0.375rem); }

.bihui-page .faq-section { padding: var(--bihui-section-y) 0; }

@media (max-width: 560px) {
    .bihui-cat-grid .bihui-cat { padding-right: 0; }
    .bihui-cat { padding: 1.625rem 0; }
    .bihui-cat:hover { padding-left: 0; }
    .bihui-cat::before { right: 0; top: 1.625rem; }
}

@media (max-width: 480px) {
    .bihui-cta-primary { width: 100%; justify-content: center; }
}