:root {
    --biz-navy: #111111;
    --biz-navy-light: #333333;
    --biz-gold: #111111;
    --biz-gold-dark: #000000;
    --biz-yellow: #e6b422;
    --biz-yellow-dark: #c99a1a;
    --biz-bg: #ffffff;
    --biz-surface: #fafafa;
    --biz-white: #ffffff;
    --biz-text: #111111;
    --biz-muted: #737373;
    --biz-border: #e8e8e8;
    --biz-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --biz-shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.09);
    --biz-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --biz-dur: 0.38s;
    --biz-max: 1120px;
    --biz-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --biz-mono: ui-monospace, Consolas, "Courier New", monospace;
    --biz-header-bg: rgba(255, 255, 255, 0.92);
    --biz-hover-bg: rgba(0, 0, 0, 0.03);
    --tilt-x: 0deg;
    --tilt-y: 0deg;
}

[data-theme="dark"] {
    color-scheme: dark;
    --biz-navy: #f0f0f0;
    --biz-navy-light: #d4d4d4;
    --biz-gold: #f0f0f0;
    --biz-gold-dark: #ffffff;
    --biz-yellow: #f5c518;
    --biz-yellow-dark: #e6b422;
    --biz-bg: #0d0d0d;
    --biz-surface: #161616;
    --biz-white: #1c1c1c;
    --biz-text: #ececec;
    --biz-muted: #9ca3af;
    --biz-border: #2d2d2d;
    --biz-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
    --biz-shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
    --biz-header-bg: rgba(13, 13, 13, 0.92);
    --biz-hover-bg: rgba(255, 255, 255, 0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--biz-font);
    background: var(--biz-bg);
    color: var(--biz-text);
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s var(--biz-ease), color 0.3s var(--biz-ease);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.biz-wrap { min-height: 100vh; display: flex; flex-direction: column; }
.biz-container { max-width: var(--biz-max); margin: 0 auto; padding: 0 20px; width: 100%; }

/* Wide content pages — doc / update */
.biz-page-shell {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
    box-sizing: border-box;
}
.biz-page-main {
    flex: 1;
    width: 100%;
    max-width: min(1480px, calc(100vw - 32px));
    margin-left: auto;
    margin-right: auto;
    padding: 20px 16px 48px;
    box-sizing: border-box;
}
.biz-container.biz-page-full,
main.biz-page-full,
.biz-container.biz-page-main.biz-page-full,
main.biz-page-main.biz-page-full {
    max-width: none;
    width: 100%;
    padding-left: 16px;
    padding-right: 16px;
}
.biz-page-banner .biz-page-shell,
.biz-banner .biz-page-shell,
.biz-page-banner .biz-container.biz-page-full,
.biz-banner .biz-container.biz-page-full {
    max-width: none;
    width: 100%;
}
.biz-doc-page,
.biz-document-page,
.biz-update-page {
    padding-top: 16px;
    padding-bottom: 48px;
}
.biz-page-full .biz-card,
.biz-page-full .biz-page-card,
.biz-doc-page .biz-page-card,
.biz-document-page .biz-card {
    width: 100%;
    max-width: none;
}
.biz-page-card {
    width: 100%;
    min-height: calc(100vh - 220px);
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
}
.biz-doc-page .biz-tab-panel.active { flex: 1; width: 100%; }
.biz-doc-page .biz-tabs-nav,
.biz-doc-page .biz-tab-panel { width: 100%; }
.biz-doc-page .biz-doc-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
    margin-bottom: 20px;
}
.biz-doc-page .biz-doc-meta .biz-doc-request { grid-column: 1 / -1; margin-bottom: 0; }
.biz-doc-page .biz-tab-content,
.biz-doc-page .biz-tab-panel.active { width: 100%; }
.biz-doc-page .biz-table-wrap { width: 100%; }
.biz-doc-page .biz-table { width: 100%; table-layout: auto; }
.biz-doc-page .biz-code { width: 100%; max-width: 100%; }
.biz-doc-page .biz-page-banner p,
.biz-doc-page .biz-banner p { max-width: none; }
.biz-doc-page .biz-page-card {
    margin: 0;
    padding: 24px;
    border-radius: 10px;
}

/* Motion — scroll reveal */
.biz-reveal {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 0.65s var(--biz-ease) var(--reveal-delay, 0s),
        transform 0.65s var(--biz-ease) var(--reveal-delay, 0s);
}
.biz-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Header — hmfak-style clean white bar */
.biz-header {
    background: var(--biz-header-bg);
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid var(--biz-border);
    backdrop-filter: blur(12px);
    transition: box-shadow 0.3s var(--biz-ease), border-color 0.3s, background 0.3s var(--biz-ease);
}
.biz-header.is-scrolled {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
    border-bottom-color: transparent;
}
.biz-header-inner {
    display: flex; align-items: center;
    min-height: 60px; padding: 6px 0; gap: 12px;
}
.biz-logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 16px; font-weight: 600; color: var(--biz-text);
    flex-shrink: 0;
}
.biz-logo {
    transition: opacity 0.25s var(--biz-ease), transform 0.25s var(--biz-ease);
}
.biz-logo:hover { opacity: 0.75; transform: translateY(-1px); }
.biz-logo img {
    width: 32px; height: 32px; border-radius: 6px; object-fit: cover;
    transition: transform 0.35s var(--biz-ease);
}
.biz-logo:hover img { transform: rotate(-4deg) scale(1.05); }
.biz-nav {
    display: flex; align-items: center; justify-content: center;
    flex: 1; flex-wrap: wrap; gap: 2px;
    min-width: 0;
}
.biz-nav a {
    padding: 6px 11px; font-size: 13px; font-weight: 400;
    color: var(--biz-muted); border-radius: 6px;
    position: relative; white-space: nowrap;
    transition: color 0.25s var(--biz-ease), background 0.25s;
}
.biz-nav a::after {
    content: '';
    position: absolute; left: 11px; right: 11px; bottom: 3px;
    height: 2px; background: var(--biz-navy); border-radius: 1px;
    transform: scaleX(0); transform-origin: center;
    transition: transform 0.3s var(--biz-ease);
}
.biz-nav a:hover { color: var(--biz-text); background: var(--biz-hover-bg); }
.biz-nav a:hover::after, .biz-nav a.active::after { transform: scaleX(1); }
.biz-nav a.active {
    color: var(--biz-text); font-weight: 500;
}
.biz-header-btns { display: flex; gap: 8px; align-items: center; flex-shrink: 0; margin-left: auto; }
.biz-header-auth { display: inline-flex; }

.biz-theme-toggle {
    width: 36px; height: 36px;
    border: 1px solid var(--biz-border); background: var(--biz-white);
    color: var(--biz-text); border-radius: 6px; cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0; flex-shrink: 0;
    transition: border-color 0.25s, background 0.25s, color 0.25s, transform 0.25s;
}
.biz-theme-toggle:hover {
    border-color: var(--biz-yellow);
    color: var(--biz-yellow);
    transform: translateY(-1px);
}
.biz-theme-icon { width: 18px; height: 18px; display: none; }
html[data-theme-pref="auto"] .biz-theme-icon-auto,
html[data-theme-pref="light"] .biz-theme-icon-sun,
html[data-theme-pref="dark"] .biz-theme-icon-moon { display: block; }
.biz-theme-toggle-mobile {
    width: 100%; height: auto; padding: 12px 16px; margin-top: 8px;
    font-size: 14px; border: none; border-top: 1px solid var(--biz-border);
    border-radius: 0; background: transparent; justify-content: flex-start;
}

.biz-btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 8px 18px; font-size: 13px; font-weight: 500;
    border-radius: 6px; border: none; cursor: pointer;
    transition: transform 0.25s var(--biz-ease), box-shadow 0.25s, background 0.25s, border-color 0.25s, color 0.25s;
}
.biz-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.1); }
.biz-btn:active { transform: translateY(0) scale(0.97); box-shadow: none; }
.biz-btn-primary { background: var(--biz-navy); color: #fff; }
.biz-btn-primary:hover { background: #000; }
.biz-btn-ghost {
    background: transparent; color: var(--biz-text);
    border: 1px solid var(--biz-border);
}
.biz-btn-ghost:hover { border-color: var(--biz-navy); }
.biz-btn-gold { background: var(--biz-navy); color: #fff; }
.biz-btn-gold:hover { background: #000; }
.biz-btn-navy { background: var(--biz-navy); color: #fff; }
.biz-btn-navy:hover { background: #000; }
.biz-btn-outline { background: transparent; border: 1px solid var(--biz-border); color: var(--biz-text); }
.biz-btn-outline:hover { border-color: var(--biz-navy); background: var(--biz-surface); }
.biz-btn-light { background: transparent; border: 1px solid var(--biz-border); color: var(--biz-text); }
.biz-btn-light:hover { border-color: var(--biz-navy); }

.biz-menu-btn {
    display: none; width: 36px; height: 36px;
    border: 1px solid var(--biz-border); background: var(--biz-white);
    color: var(--biz-text); border-radius: 6px; cursor: pointer;
    align-items: center; justify-content: center; padding: 0;
}
.biz-menu-btn svg { width: 18px; height: 18px; }

/* Hero — full-width banner carousel */
.biz-hero-banner {
    position: relative; padding: 0; overflow: hidden;
    border-bottom: 1px solid var(--biz-border);
}
.biz-hero-overlay {
    position: absolute; inset: 0; z-index: 2;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0.4) 100%);
    pointer-events: none;
}
.biz-hero-inner { max-width: 720px; pointer-events: auto; }
.biz-hero-centered { text-align: center; margin: 0 auto; padding: 0 20px; }
.biz-hero-tag {
    display: inline-block; padding: 5px 12px; margin-bottom: 16px;
    font-size: 12px; font-weight: 500; letter-spacing: 0.04em;
    color: rgba(255,255,255,0.9); background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25); border-radius: 4px;
    backdrop-filter: blur(6px);
}
.biz-hero-banner h1 {
    font-size: clamp(32px, 5vw, 48px); font-weight: 600;
    line-height: 1.2; margin-bottom: 14px; letter-spacing: -0.02em;
    color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.biz-hero-banner p {
    font-size: clamp(14px, 2vw, 16px); color: rgba(255,255,255,0.88);
    line-height: 1.75; margin-bottom: 24px; max-width: 560px; margin-left: auto; margin-right: auto;
}
.biz-hero-btns { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.biz-btn-ghost-light {
    background: rgba(255,255,255,0.12); color: #fff;
    border: 1px solid rgba(255,255,255,0.45);
    backdrop-filter: blur(4px);
}
.biz-btn-ghost-light:hover { background: rgba(255,255,255,0.22); border-color: #fff; box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* Hero carousel */
.biz-carousel {
    position: relative; width: 100%;
    background: var(--biz-surface);
}
.biz-carousel-full { height: clamp(320px, 42vw, 520px); }
.biz-carousel-track { position: relative; width: 100%; height: 100%; }
.biz-carousel-slide {
    position: absolute; inset: 0;
    opacity: 0; visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
.biz-carousel-slide.active { opacity: 1; visibility: visible; z-index: 1; }
.biz-carousel-slide img {
    width: 100%; height: 100%; object-fit: cover; object-position: center; display: block;
}
.biz-carousel-arrow {
    position: absolute; top: 50%; transform: translateY(-50%) scale(1);
    z-index: 3; width: 36px; height: 36px;
    border: 1px solid rgba(255,255,255,0.4); background: rgba(255,255,255,0.2);
    color: #fff; border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: opacity 0.2s;
    backdrop-filter: blur(4px);
}
.biz-carousel:hover .biz-carousel-arrow { opacity: 1; }
.biz-carousel-prev { left: 16px; }
.biz-carousel-next { right: 16px; }
.biz-carousel-arrow svg { width: 18px; height: 18px; }
.biz-carousel-arrow:hover { background: rgba(255,255,255,0.35); transform: translateY(-50%) scale(1.08); }
.biz-carousel-dots {
    position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
    z-index: 3; display: flex; gap: 6px;
}
.biz-carousel-dot {
    width: 6px; height: 6px; padding: 0; border: none; border-radius: 50%;
    background: rgba(255,255,255,0.45); cursor: pointer;
    transition: width 0.3s var(--biz-ease), background 0.3s, transform 0.3s;
}
.biz-carousel-dot:hover { transform: scale(1.2); background: rgba(255,255,255,0.8); }
.biz-carousel-dot.active { background: #fff; width: 20px; border-radius: 3px; }

/* Stats */
.biz-stats { padding: 48px 0 0; }
.biz-stats-bottom { padding: 48px 0; margin-top: 0; }
.biz-stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
    background: var(--biz-white); border-radius: 8px;
    border: 1px solid var(--biz-border);
}
.biz-stat {
    padding: 24px 20px; text-align: center;
    border-right: 1px solid var(--biz-border);
    transition: background 0.3s var(--biz-ease), transform 0.3s var(--biz-ease);
    cursor: default;
}
.biz-stat:last-child { border-right: none; }
.biz-stat:hover { background: var(--biz-surface); transform: translateY(-3px); }
.biz-stat-num {
    font-size: 24px; font-weight: 600; color: var(--biz-text); margin-bottom: 4px;
    transition: transform 0.35s var(--biz-ease), color 0.35s;
    display: inline-block;
}
.biz-stat:hover .biz-stat-num { transform: scale(1.08); }
.biz-stat-label { font-size: 12px; color: var(--biz-muted); transition: color 0.25s; }
.biz-stat:hover .biz-stat-label { color: var(--biz-text); }

/* Section */
.biz-section { padding: 64px 0; }
.biz-section-head { text-align: center; margin-bottom: 40px; }
.biz-section-head h2 { font-size: 24px; font-weight: 600; color: var(--biz-text); margin-bottom: 10px; letter-spacing: -0.02em; }
.biz-section-head p { font-size: 14px; color: var(--biz-muted); max-width: 520px; margin: 0 auto; }
.biz-section-head .biz-line {
    width: 24px; height: 2px; background: var(--biz-navy); margin: 14px auto 0;
    transition: width 0.4s var(--biz-ease);
}
.biz-section-head:hover .biz-line { width: 56px; }

/* Service cards */
.biz-services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.biz-service {
    position: relative; overflow: hidden;
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 8px; padding: 28px 24px;
    transform: perspective(800px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateY(0);
    transition:
        transform 0.35s var(--biz-ease),
        box-shadow 0.35s var(--biz-ease),
        border-color 0.35s;
    cursor: default;
}
.biz-service::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--biz-navy), #555);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.4s var(--biz-ease);
}
.biz-service::after {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0,0,0,0.04), transparent 40%);
    opacity: 0; transition: opacity 0.35s;
    pointer-events: none;
}
.biz-service:hover {
    transform: perspective(800px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateY(-8px);
    border-color: transparent;
    box-shadow: var(--biz-shadow-hover);
}
.biz-service:hover::before { transform: scaleX(1); }
.biz-service:hover::after { opacity: 1; }
.biz-service-icon {
    width: 40px; height: 40px; background: var(--biz-surface);
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    margin-bottom: 16px; color: var(--biz-text);
    transition: transform 0.4s var(--biz-ease), background 0.35s, color 0.35s, box-shadow 0.35s;
}
.biz-service:hover .biz-service-icon {
    transform: scale(1.12) rotate(-6deg);
    background: var(--biz-navy); color: #fff;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}
.biz-service-icon svg { width: 20px; height: 20px; transition: transform 0.35s var(--biz-ease); }
.biz-service:hover .biz-service-icon svg { transform: scale(1.05); }
.biz-service h3 {
    font-size: 15px; font-weight: 600; color: var(--biz-text); margin-bottom: 8px;
    transition: transform 0.3s var(--biz-ease), color 0.3s;
}
.biz-service:hover h3 { transform: translateX(4px); }
.biz-service p {
    font-size: 13px; color: var(--biz-muted); line-height: 1.7;
    transition: color 0.3s;
}
.biz-service:hover p { color: #555; }

/* Verify system */
.biz-section-alt { background: var(--biz-surface); }
.biz-verify-layout {
    display: grid; grid-template-columns: 300px 1fr; gap: 24px; align-items: start;
}
.biz-verify-flow {
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 8px; padding: 28px 24px; color: var(--biz-text);
    transition: box-shadow 0.35s var(--biz-ease), transform 0.35s var(--biz-ease);
}
.biz-verify-flow:hover {
    box-shadow: var(--biz-shadow-hover);
    transform: translateY(-4px);
}
.biz-verify-flow h3 {
    font-size: 15px; font-weight: 600; margin-bottom: 20px;
    padding-bottom: 12px; border-bottom: 1px solid var(--biz-border);
}
.biz-steps { list-style: none; margin: 0 0 24px; padding: 0; }
.biz-steps li {
    display: flex; gap: 12px; align-items: flex-start;
    padding: 14px 10px; margin: 0 -10px;
    border-bottom: 1px solid var(--biz-border);
    border-radius: 8px;
    transition: background 0.3s var(--biz-ease), padding-left 0.3s var(--biz-ease), transform 0.3s var(--biz-ease);
    cursor: default;
}
.biz-steps li:last-child { border-bottom: none; padding-bottom: 14px; }
.biz-steps li:hover {
    background: var(--biz-surface);
    padding-left: 16px;
    transform: translateX(4px);
}
.biz-step-icon {
    flex-shrink: 0; width: 36px; height: 36px;
    background: var(--biz-surface); border-radius: 8px;
    display: flex; align-items: center; justify-content: center; color: var(--biz-text);
    transition: transform 0.35s var(--biz-ease), background 0.35s, color 0.35s, box-shadow 0.35s;
}
.biz-steps li:hover .biz-step-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--biz-navy); color: #fff;
    box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}
.biz-step-icon svg { width: 18px; height: 18px; }
.biz-steps li strong {
    display: block; font-size: 14px; font-weight: 600; margin-bottom: 2px;
    transition: color 0.25s;
}
.biz-steps li:hover strong { color: var(--biz-navy); }
.biz-steps li span { font-size: 12px; color: var(--biz-muted); line-height: 1.6; transition: color 0.25s; }
.biz-steps li:hover span { color: #555; }
.biz-verify-flow .biz-btn-gold { width: 100%; }

.biz-cap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.biz-cap-item {
    display: flex; gap: 12px; align-items: flex-start;
    padding: 18px 16px; background: var(--biz-white);
    border: 1px solid var(--biz-border); border-radius: 8px;
    transform: perspective(800px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateX(0);
    transition: transform 0.35s var(--biz-ease), box-shadow 0.35s, border-color 0.35s, background 0.35s;
    cursor: default;
}
.biz-cap-item:hover {
    transform: perspective(800px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateX(6px) translateY(-4px);
    border-color: transparent;
    box-shadow: var(--biz-shadow-hover);
    background: var(--biz-white);
}
.biz-cap-icon {
    flex-shrink: 0; width: 36px; height: 36px;
    background: var(--biz-surface); border-radius: 8px;
    display: flex; align-items: center; justify-content: center; color: var(--biz-text);
    transition: transform 0.4s var(--biz-ease), background 0.35s, color 0.35s, box-shadow 0.35s;
}
.biz-cap-item:hover .biz-cap-icon {
    transform: scale(1.15) rotate(-8deg);
    background: var(--biz-navy); color: #fff;
    box-shadow: 0 6px 18px rgba(0,0,0,0.14);
}
.biz-cap-icon svg { width: 18px; height: 18px; transition: transform 0.35s var(--biz-ease); }
.biz-cap-item:hover .biz-cap-icon svg { transform: scale(1.08); }
.biz-cap-item strong {
    display: block; font-size: 13px; font-weight: 600; color: var(--biz-text); margin-bottom: 2px;
    transition: transform 0.3s var(--biz-ease);
}
.biz-cap-item:hover strong { transform: translateX(3px); }
.biz-cap-item span { font-size: 12px; color: var(--biz-muted); line-height: 1.55; transition: color 0.25s; }
.biz-cap-item:hover span { color: var(--biz-text); }

.biz-api-strip {
    display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px;
    margin-top: 32px; padding: 16px 20px;
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 8px; font-size: 12px; color: var(--biz-muted);
    transition: box-shadow 0.35s var(--biz-ease), transform 0.35s var(--biz-ease), border-color 0.35s;
}
.biz-api-strip:hover {
    box-shadow: var(--biz-shadow-hover);
    transform: translateY(-3px);
    border-color: #ddd;
}
.biz-api-strip > span:first-child {
    display: flex; align-items: center; gap: 6px;
    font-weight: 600; color: var(--biz-text); font-size: 13px;
}
.biz-api-strip > span:not(:first-child)::before {
    content: '·'; margin-right: 6px; color: var(--biz-border);
}

/* Modal */
.biz-modal-overlay {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    padding: 24px;
    opacity: 0; visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}
.biz-modal-overlay.show { opacity: 1; visibility: visible; }

.biz-modal {
    width: 100%; max-width: 480px;
    background: var(--biz-white);
    border-radius: 10px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    transform: translateY(12px);
    transition: transform 0.25s ease;
    border: 1px solid var(--biz-border);
}
.biz-modal-overlay.show .biz-modal { transform: translateY(0); }

.biz-modal-head {
    background: var(--biz-white);
    padding: 24px 24px 16px;
    position: relative;
    border-bottom: 1px solid var(--biz-border);
}
.biz-modal-badge {
    display: inline-block;
    font-size: 11px; font-weight: 500; letter-spacing: 0.06em;
    color: var(--biz-muted); margin-bottom: 6px;
}
.biz-modal-head h2 { font-size: 18px; font-weight: 600; color: var(--biz-text); }
.biz-modal-close {
    position: absolute; top: 16px; right: 16px;
    width: 28px; height: 28px;
    border: 1px solid var(--biz-border); background: var(--biz-white);
    color: var(--biz-muted); border-radius: 6px; cursor: pointer;
    font-size: 16px; line-height: 1; transition: 0.15s;
}
.biz-modal-close:hover { color: var(--biz-text); border-color: #ccc; }

.biz-modal-body {
    padding: 20px 24px;
    font-size: 14px; line-height: 1.8; color: var(--biz-text);
    max-height: 300px; overflow-y: auto;
}
.biz-modal-body p { margin-bottom: 10px; }
.biz-modal-body p:last-child { margin-bottom: 0; }

.biz-modal-foot {
    padding: 14px 24px 20px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap;
    border-top: 1px solid var(--biz-border);
}
.biz-modal-dismiss {
    font-size: 12px; color: var(--biz-muted);
    background: none; border: none; cursor: pointer;
    text-decoration: underline; text-underline-offset: 3px;
}
.biz-modal-dismiss:hover { color: var(--biz-text); }

/* Page banner */
.biz-banner {
    background: var(--biz-surface); color: var(--biz-text);
    padding: 48px 0; border-bottom: 1px solid var(--biz-border);
}
.biz-banner h1 { font-size: 28px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.02em; }
.biz-banner p { font-size: 14px; color: var(--biz-muted); max-width: 600px; }
.biz-page-banner p,
.biz-update-hero p { max-width: none; }
.biz-api-status { margin-top: 10px; font-size: 13px; }
.biz-api-status.on { color: #166534; }
.biz-api-status.off { color: #991b1b; }
.biz-link-test { margin-left: 12px; font-size: 13px; color: var(--biz-muted); text-decoration: underline; text-underline-offset: 3px; }
.biz-link-test:hover { color: var(--biz-text); }

/* Card */
.biz-card {
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 8px; padding: 24px; margin-bottom: 20px;
    transition: box-shadow 0.35s var(--biz-ease), transform 0.35s var(--biz-ease), border-color 0.35s;
}
.biz-card:hover {
    box-shadow: var(--biz-shadow-hover);
    transform: translateY(-3px);
    border-color: #ddd;
}
.biz-card-title {
    font-size: 15px; font-weight: 600; color: var(--biz-text);
    padding-bottom: 14px; margin-bottom: 18px; border-bottom: 1px solid var(--biz-border);
}

/* Document */
.biz-rules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.biz-rule {
    padding: 14px; background: var(--biz-surface); border-radius: 6px; font-size: 13px;
    transition: transform 0.3s var(--biz-ease), background 0.3s, box-shadow 0.3s;
}
.biz-rule:hover { transform: translateY(-3px); background: #fff; box-shadow: var(--biz-shadow); }
.biz-rule b { display: block; font-size: 11px; color: var(--biz-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }

.biz-search input {
    width: 100%; max-width: 400px; padding: 10px 14px; border: 1px solid var(--biz-border);
    border-radius: 6px; font-size: 14px; background: var(--biz-white);
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.biz-search input:focus {
    outline: none; border-color: var(--biz-navy);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
    transform: translateY(-1px);
}

.biz-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.biz-tag {
    padding: 6px 12px; font-size: 12px; background: var(--biz-white);
    border: 1px solid var(--biz-border); border-radius: 6px; color: var(--biz-text);
    transition: transform 0.25s var(--biz-ease), background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.biz-tag:hover {
    background: var(--biz-navy); color: #fff; border-color: var(--biz-navy);
    transform: translateY(-2px); box-shadow: 0 6px 14px rgba(0,0,0,0.12);
}

.biz-api-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.biz-api-card {
    display: block; padding: 20px; background: var(--biz-white);
    border: 1px solid var(--biz-border); border-radius: 8px;
    transition: transform 0.3s var(--biz-ease), box-shadow 0.3s, border-color 0.3s;
}
.biz-api-card:hover {
    border-color: transparent;
    transform: translateY(-5px);
    box-shadow: var(--biz-shadow-hover);
}
.biz-api-card h3 { font-size: 14px; font-weight: 600; color: var(--biz-text); margin-bottom: 6px; }
.biz-api-card p { font-size: 12px; color: var(--biz-muted); }
.biz-badge { display: inline-block; margin-top: 10px; padding: 3px 8px; font-size: 11px; border-radius: 4px; background: #f0fdf4; color: #166534; }
.biz-api-card.off .biz-badge { background: #fef2f2; color: #991b1b; }
.biz-empty { padding: 32px; text-align: center; color: var(--biz-muted); }

/* Doc detail */
.biz-tabs-nav { display: flex; gap: 0; border-bottom: 1px solid var(--biz-border); margin-bottom: 20px; }
.biz-tab-btn {
    padding: 12px 20px; font-size: 13px; font-weight: 500; color: var(--biz-muted);
    background: none; border: none; cursor: pointer;
    border-bottom: 2px solid transparent; margin-bottom: -1px;
    transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.biz-tab-btn:hover { color: var(--biz-text); transform: translateY(-2px); }
.biz-tab-btn.active { color: var(--biz-text); border-bottom-color: var(--biz-navy); }
.biz-tab-panel { display: none; }
.biz-tab-panel.active { display: block; }

.biz-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 20px; }
.biz-meta-item { padding: 14px; background: var(--biz-surface); border-radius: 6px; font-size: 13px; }
.biz-meta-item label { display: block; font-size: 11px; font-weight: 500; color: var(--biz-muted); margin-bottom: 4px; }
.biz-copy {
    color: var(--biz-text); cursor: pointer; word-break: break-all;
    border-bottom: 1px dashed var(--biz-border);
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.biz-copy:hover { border-color: var(--biz-navy); background: var(--biz-surface); }

.biz-table-wrap { overflow-x: auto; margin-bottom: 20px; }
.biz-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.biz-table th, .biz-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--biz-border); }
.biz-table th { background: var(--biz-surface); color: var(--biz-text); font-weight: 600; font-size: 12px; }
.biz-table tr:hover td { background: rgba(0, 0, 0, 0.02); }

.biz-code {
    background: #f5f5f5; color: #333; padding: 16px; border-radius: 6px;
    font-family: var(--biz-mono); font-size: 12px; line-height: 1.6;
    overflow-x: auto; white-space: pre-wrap; word-break: break-all;
    border: 1px solid var(--biz-border);
}
.biz-subtitle { font-size: 14px; font-weight: 600; color: var(--biz-text); margin: 20px 0 10px; }
.biz-alert { padding: 12px 16px; background: #fafafa; border: 1px solid var(--biz-border); border-radius: 6px; font-size: 13px; color: var(--biz-muted); margin-top: 12px; }
.biz-dl-list a {
    display: block; padding: 10px 14px; border: 1px solid var(--biz-border);
    border-radius: 6px; margin-bottom: 6px; font-size: 13px;
    transition: transform 0.25s var(--biz-ease), border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.biz-dl-list a:hover {
    border-color: #ccc; background: var(--biz-surface);
    transform: translateX(6px); box-shadow: var(--biz-shadow);
}

.biz-changelog { font-size: 13px; line-height: 1.8; color: var(--biz-muted); }

/* Update page */
.biz-update-hero { padding: 56px 0; }
.biz-update-hero-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px; flex-wrap: wrap;
}
.biz-update-hero-tag {
    display: inline-block; font-size: 12px; color: var(--biz-muted);
    background: var(--biz-white); border: 1px solid var(--biz-border);
    padding: 4px 10px; border-radius: 4px; margin-bottom: 12px;
}
.biz-update-hero h1 { margin-bottom: 8px; }
.biz-update-hero-card {
    min-width: 180px; padding: 20px 24px;
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 10px; text-align: center;
    box-shadow: var(--biz-shadow);
    transition: transform 0.3s var(--biz-ease), box-shadow 0.3s;
}
.biz-update-hero-card:hover { transform: translateY(-4px); box-shadow: var(--biz-shadow-hover); }
.biz-update-hero-label { display: block; font-size: 12px; color: var(--biz-muted); margin-bottom: 6px; }
.biz-update-hero-card strong { display: block; font-size: 26px; font-weight: 600; color: var(--biz-text); line-height: 1.2; }
.biz-update-hero-card span:last-child { display: block; font-size: 12px; color: var(--biz-muted); margin-top: 6px; }

.biz-update-page .biz-card { width: 100%; }
.biz-update-list,
.biz-update-block,
.biz-update-block-body,
.biz-update-items { width: 100%; min-width: 0; }
.biz-update-toolbar { width: 100%; }
.biz-update-meta-bar { width: 100%; }
.biz-update-hero-inner { width: 100%; }
.biz-page-banner .biz-container:not(.biz-page-full),
.biz-banner .biz-container:not(.biz-page-full) { max-width: min(1480px, calc(100vw - 32px)); }

.biz-update-page .biz-reveal,
.biz-page-full .biz-reveal,
.biz-static-page .biz-reveal {
    opacity: 1;
    transform: none;
}
.biz-update-item.is-filtered-out { display: none; }
.biz-update-block.is-filtered-out { display: none; }

.biz-update-toolbar {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 12px; margin-bottom: 16px;
}
.biz-update-search {
    position: relative; flex: 1; min-width: 220px;
}
.biz-update-search svg {
    position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 16px; color: var(--biz-muted); pointer-events: none;
}
.biz-update-search input {
    width: 100%; padding: 10px 12px 10px 36px;
    border: 1px solid var(--biz-border); border-radius: 8px;
    font-size: 14px; background: var(--biz-white);
    transition: border-color 0.25s, box-shadow 0.25s;
}
.biz-update-search input:focus {
    outline: none; border-color: var(--biz-navy);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.05);
}
.biz-update-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.biz-update-filters button {
    padding: 8px 14px; font-size: 12px; border-radius: 999px;
    border: 1px solid var(--biz-border); background: var(--biz-white);
    color: var(--biz-muted); cursor: pointer;
    transition: all 0.25s var(--biz-ease);
}
.biz-update-filters button:hover { border-color: #ccc; color: var(--biz-text); }
.biz-update-filters button.active {
    background: var(--biz-navy); border-color: var(--biz-navy); color: #fff;
}

.biz-update-meta-bar {
    display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px;
}
.biz-update-meta-bar span {
    font-size: 12px; color: var(--biz-muted);
    padding: 5px 10px; background: var(--biz-surface);
    border: 1px solid var(--biz-border); border-radius: 6px;
}

.biz-update-shell {
    display: grid; grid-template-columns: minmax(160px, 200px) minmax(0, 1fr);
    gap: 16px; align-items: start; width: 100%;
}
.biz-update-sidebar {
    position: sticky; top: 76px;
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 10px; padding: 16px;
    max-height: calc(100vh - 96px); overflow-y: auto;
}
.biz-update-sidebar-title {
    font-size: 12px; font-weight: 600; color: var(--biz-muted);
    text-transform: uppercase; letter-spacing: 0.06em;
    margin-bottom: 10px; padding-bottom: 10px;
    border-bottom: 1px solid var(--biz-border);
}
.biz-update-version-nav { display: flex; flex-direction: column; gap: 4px; }
.biz-update-version-nav a {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 10px; border-radius: 6px; font-size: 13px;
    color: var(--biz-muted); transition: all 0.2s;
}
.biz-update-version-nav a em {
    font-style: normal; font-size: 11px; color: var(--biz-muted);
    background: var(--biz-surface); padding: 2px 6px; border-radius: 4px;
}
.biz-update-version-nav a:hover,
.biz-update-version-nav a.active {
    background: var(--biz-surface); color: var(--biz-text);
}
.biz-update-version-nav a.active { font-weight: 600; box-shadow: inset 2px 0 0 var(--biz-navy); }
.biz-update-version-nav a span:first-child { color: var(--biz-text); font-weight: 500; }

.biz-update-list { display: flex; flex-direction: column; gap: 12px; }
.biz-update-block {
    background: var(--biz-white); border: 1px solid var(--biz-border);
    border-radius: 10px; overflow: hidden;
    transition: box-shadow 0.3s var(--biz-ease), border-color 0.3s;
}
.biz-update-block.is-latest { border-color: var(--biz-navy); }
.biz-update-block.is-open,
.biz-update-block:hover { box-shadow: var(--biz-shadow-hover); }
.biz-update-toggle {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(140px, auto) 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 16px 18px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background 0.25s;
    color: var(--biz-text);
    font: inherit;
}
.biz-update-toggle:hover { background: var(--biz-surface); }
.biz-update-block-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--biz-text);
    white-space: nowrap;
    line-height: 1.4;
}
.biz-update-block-meta { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; min-width: 0; }
.biz-update-pill {
    font-size: 11px; padding: 2px 8px; border-radius: 4px;
    background: var(--biz-surface); color: var(--biz-muted);
}
.biz-update-pill.latest { background: var(--biz-navy); color: #fff; }
[data-theme="dark"] .biz-btn-primary,
[data-theme="dark"] .biz-btn-gold,
[data-theme="dark"] .biz-btn-navy { background: #f0f0f0; color: #111; }
[data-theme="dark"] .biz-btn-primary:hover,
[data-theme="dark"] .biz-btn-gold:hover,
[data-theme="dark"] .biz-btn-navy:hover { background: #fff; }
[data-theme="dark"] .biz-code { background: #121212; color: #d4d4d4; border-color: var(--biz-border); }
[data-theme="dark"] .biz-alert { background: #141414; }
[data-theme="dark"] .biz-service:hover::after,
[data-theme="dark"] .biz-cap-item:hover .biz-cap-icon { background: #f0f0f0; color: #111; }
[data-theme="dark"] .biz-stat-num { color: var(--biz-yellow); }
[data-theme="dark"] .biz-section-head h2 { color: var(--biz-text); }
.biz-update-pill.add { background: #ecfdf5; color: #166534; }
.biz-update-pill.rewrite { background: #fef9c3; color: #a16207; }
.biz-update-pill.fix { background: #fef2f2; color: #991b1b; }
.biz-update-pill.opt { background: #eff6ff; color: #1d4ed8; }
.biz-update-chevron {
    width: 18px; height: 18px; flex-shrink: 0; color: var(--biz-muted);
    transition: transform 0.3s var(--biz-ease);
}
.biz-update-toggle[aria-expanded="true"] .biz-update-chevron { transform: rotate(180deg); }

.biz-update-block-body {
    border-top: 1px solid var(--biz-border);
    padding: 8px 12px 14px;
    background: var(--biz-surface);
}
.biz-update-items { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.biz-update-item {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 10px 12px; border-radius: 8px;
    background: var(--biz-white); border: 1px solid transparent;
    transition: transform 0.25s var(--biz-ease), box-shadow 0.25s, border-color 0.25s;
}
.biz-update-item:hover {
    transform: translateX(4px);
    border-color: var(--biz-border);
    box-shadow: var(--biz-shadow);
}
.biz-update-item-no {
    flex-shrink: 0; width: 22px; height: 22px;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 600; color: var(--biz-muted);
    background: var(--biz-surface); border-radius: 4px;
}
.biz-update-item-tag {
    flex-shrink: 0; font-size: 11px; font-weight: 600;
    padding: 2px 7px; border-radius: 4px; margin-top: 1px;
}
.biz-update-item-tag.add { background: #ecfdf5; color: #166534; }
.biz-update-item-tag.rewrite { background: #fef9c3; color: #a16207; }
.biz-update-item-tag.fix { background: #fef2f2; color: #991b1b; }
.biz-update-item-tag.opt { background: #eff6ff; color: #1d4ed8; }
[data-theme="dark"] .biz-update-pill.rewrite,
[data-theme="dark"] .biz-update-item-tag.rewrite { background: #422006; color: #fbbf24; }
.biz-update-item-text { font-size: 13px; color: var(--biz-text); line-height: 1.65; }
.biz-update-no-result { margin-top: 20px; }

.biz-agreement-page { padding-top: 16px; padding-bottom: 48px; }
.biz-agreement-card {
    width: 100%;
    max-width: 100%;
    margin: 0;
}
.biz-agreement {
    width: 100%;
    max-width: none;
    font-size: 14px;
    line-height: 1.85;
    color: var(--biz-muted);
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.biz-agreement h5 {
    font-size: clamp(17px, 4.2vw, 20px);
    font-weight: 600;
    color: var(--biz-text);
    margin: 0 0 16px;
    line-height: 1.45;
}
.biz-agreement h3 {
    font-size: clamp(15px, 3.8vw, 16px);
    font-weight: 600;
    color: var(--biz-text);
    margin: 28px 0 12px;
    padding-top: 12px;
    border-top: 1px solid var(--biz-border);
    line-height: 1.45;
}
.biz-agreement h3:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 20px;
}
.biz-agreement p { margin: 0 0 14px; }
.biz-agreement-list {
    margin: 0 0 14px;
    padding-left: 1.25em;
    list-style: decimal;
}
.biz-agreement-list li {
    margin-bottom: 8px;
    padding-left: 4px;
    line-height: 1.75;
}
.biz-agreement-link {
    color: var(--biz-text);
    text-decoration: underline;
    text-underline-offset: 3px;
    word-break: break-all;
}
.biz-agreement-link:hover { opacity: 0.85; }
.biz-agreement-meta {
    font-size: 12px;
    color: var(--biz-muted);
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--biz-border);
}
.biz-agreement-banner p { max-width: none; }

/* Tool page */
.biz-tool-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.biz-tool-col { flex: 1; min-width: 140px; }
.biz-input {
    width: 100%; padding: 9px 12px; border: 1px solid var(--biz-border);
    border-radius: 6px; font-size: 13px; background: var(--biz-white);
}
.biz-input:focus { outline: none; border-color: var(--biz-navy); }
.biz-tip { padding: 12px; background: var(--biz-surface); border-radius: 6px; font-size: 12px; color: var(--biz-muted); margin-bottom: 14px; }

/* Footer */
.biz-footer { background: var(--biz-surface); color: var(--biz-muted); margin-top: auto; padding: 40px 0 24px; border-top: 1px solid var(--biz-border); }
.biz-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 28px; }
.biz-footer h4 { color: var(--biz-text); font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.biz-footer p, .biz-footer a {
    font-size: 13px; line-height: 2; color: var(--biz-muted);
    transition: color 0.25s, transform 0.25s;
    display: inline-block;
}
.biz-footer a:hover { color: var(--biz-text); transform: translateX(3px); }
.biz-footer-bottom {
    padding-top: 20px; border-top: 1px solid var(--biz-border);
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--biz-muted);
    line-height: 1.5;
}
.biz-beian {
    display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px;
}
.biz-footer .biz-beian-link {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 12px; line-height: 1.5; color: var(--biz-muted);
    transition: color 0.15s;
    transform: none;
}
.biz-footer .biz-beian-link:hover {
    color: var(--biz-text);
    transform: none;
}
.biz-footer .biz-beian-link img {
    flex-shrink: 0;
    width: 14px; height: 14px;
    object-fit: contain;
    display: block;
    margin: 0;
    position: relative;
    top: 1px;
}

.biz-mobile-nav {
    display: none; position: fixed; inset: 60px 0 0 0;
    background: var(--biz-white); padding: 12px 16px 24px;
    flex-direction: column; gap: 2px; z-index: 99;
    border-top: 1px solid var(--biz-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}
.biz-mobile-nav.open { display: flex; }
.biz-mobile-nav a {
    padding: 12px 10px; font-size: 14px; color: var(--biz-text);
    border-bottom: 1px solid var(--biz-border); border-radius: 4px;
}
.biz-mobile-nav a {
    transition: background 0.25s, padding-left 0.25s;
}
.biz-mobile-nav a:hover { background: var(--biz-surface); padding-left: 16px; }

.biz-input {
    transition: border-color 0.25s, box-shadow 0.25s;
}
.biz-input:focus { box-shadow: 0 0 0 3px rgba(0,0,0,0.05); }

@media (prefers-reduced-motion: reduce) {
    .biz-reveal { opacity: 1; transform: none; transition: none; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (max-width: 900px) {
    .biz-header-inner { justify-content: space-between; }
    .biz-carousel-full { height: clamp(280px, 50vw, 400px); }
    .biz-carousel-arrow { opacity: 1; }
    .biz-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-stat:nth-child(2) { border-right: none; }
    .biz-services { grid-template-columns: repeat(2, 1fr); }
    .biz-verify-layout { grid-template-columns: 1fr; }
    .biz-cap-grid { grid-template-columns: 1fr; }
    .biz-footer-grid { grid-template-columns: 1fr; }
    .biz-rules { grid-template-columns: 1fr; }
    .biz-nav { display: none; }
    .biz-header-auth { display: none; }
    .biz-menu-btn { display: flex; }
}
@media (max-width: 640px) {
    .biz-stats-grid { grid-template-columns: 1fr; }
    .biz-stat { border-right: none; border-bottom: 1px solid var(--biz-border); }
    .biz-services { grid-template-columns: 1fr; }
    .biz-api-strip { flex-direction: column; align-items: flex-start; gap: 6px; }
    .biz-api-strip > span:not(:first-child)::before { display: none; }
    .biz-footer-bottom { flex-direction: column; align-items: flex-start; }
    .biz-update-shell { grid-template-columns: 1fr; }
    .biz-update-sidebar { position: static; max-height: none; }
    .biz-update-version-nav { flex-direction: row; flex-wrap: wrap; }
    .biz-update-hero-inner { flex-direction: column; align-items: flex-start; }
    .biz-update-toolbar { flex-direction: column; align-items: stretch; }
    .biz-update-search { max-width: none; }
    .biz-agreement-banner { padding: 32px 0; }
    .biz-agreement-banner h1 { font-size: clamp(22px, 6vw, 28px); }
    .biz-agreement-page .biz-agreement-card { padding: 16px; border-radius: 8px; }
    .biz-agreement { font-size: 13px; line-height: 1.75; }
    .biz-agreement h3 { margin-top: 22px; padding-top: 10px; }
    .biz-agreement-list { padding-left: 1.1em; }
}