:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --primary: #f54e00;
    --primary-active: #d04200;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    background-color: var(--canvas);
    color: var(--body);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; display: block; }

ul { list-style: none; }

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

.qh-nav {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
}

.qh-nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.qh-nav__logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.01em;
    flex-shrink: 0;
}

.qh-nav__logo:hover { color: var(--primary); }

.qh-nav__menu {
    display: flex;
    align-items: center;
    gap: 28px;
}

.qh-nav__menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    line-height: 1.4;
    transition: color 0.15s;
}

.qh-nav__menu a:hover { color: var(--ink); }

.qh-nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.qh-nav__burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.qh-hero {
    background: var(--canvas);
    padding: 80px 0 64px;
    border-bottom: 1px solid var(--hairline-soft);
}

.qh-hero__label {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--rounded-pill);
    margin-bottom: 20px;
}

.qh-hero h1 {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    max-width: 780px;
    margin-bottom: 20px;
}

.qh-hero__sub {
    font-size: 18px;
    color: var(--body);
    max-width: 600px;
    line-height: 1.55;
    margin-bottom: 32px;
}

.qh-hero__img {
    margin-top: 48px;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.qh-hero__img img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.qh-section {
    padding: 80px 0;
}

.qh-section--alt {
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
    border-bottom: 1px solid var(--hairline-soft);
}

.qh-section__label {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--rounded-pill);
    margin-bottom: 16px;
}

.qh-section__title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 12px;
}

.qh-section__lead {
    font-size: 16px;
    color: var(--body);
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: 48px;
}

.qh-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.qh-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    transition: border-color 0.15s;
}

.qh-card:hover { border-color: var(--hairline-strong); }

.qh-card__img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.qh-card__body { padding: 24px; }

.qh-card__tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: var(--rounded-pill);
    margin-bottom: 12px;
}

.qh-card__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.35;
    margin-bottom: 8px;
}

.qh-card__title a { color: var(--ink); }
.qh-card__title a:hover { color: var(--primary); }

.qh-card__excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.55;
    margin-bottom: 16px;
}

.qh-card__meta {
    font-size: 13px;
    color: var(--muted);
}

.qh-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--hairline);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    margin-bottom: 48px;
}

.qh-fact {
    background: var(--surface-card);
    padding: 28px 24px;
}

.qh-fact__value {
    font-size: 32px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.5px;
    line-height: 1.1;
    margin-bottom: 6px;
}

.qh-fact__label {
    font-size: 13px;
    color: var(--muted);
}

.qh-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.qh-two-col__img {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.qh-two-col__img img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}

.qh-two-col__content h2 {
    font-size: 28px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.3px;
    margin-bottom: 16px;
}

.qh-two-col__content p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 16px;
}

.qh-article {
    max-width: 780px;
    margin: 0 auto;
    padding: 64px 0 80px;
}

.qh-article__header { margin-bottom: 40px; }

.qh-article__tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: var(--rounded-pill);
    margin-bottom: 16px;
}

.qh-article__title {
    font-size: 42px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.8px;
    color: var(--ink);
    margin-bottom: 16px;
}

.qh-article__meta {
    font-size: 13px;
    color: var(--muted);
    border-top: 1px solid var(--hairline-soft);
    padding-top: 16px;
    margin-top: 16px;
}

.qh-article__lead {
    font-size: 20px;
    color: var(--body-strong);
    line-height: 1.55;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--hairline-soft);
}

.qh-article__img {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin-bottom: 32px;
}

.qh-article__img img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

.qh-article__caption {
    font-size: 13px;
    color: var(--muted);
    padding: 10px 16px;
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
}

.qh-article__body h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.3px;
    margin: 40px 0 16px;
}

.qh-article__body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
}

.qh-article__body p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 20px;
}

.qh-article__body ul,
.qh-article__body ol {
    margin: 0 0 20px 20px;
}

.qh-article__body ul { list-style: disc; }
.qh-article__body ol { list-style: decimal; }

.qh-article__body li {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 8px;
}

.qh-article__body a {
    color: var(--primary);
    text-decoration: underline;
    text-decoration-color: rgba(245, 78, 0, 0.3);
}

.qh-article__body a:hover {
    color: var(--primary-active);
    text-decoration-color: var(--primary-active);
}

.qh-article__sources {
    margin-top: 48px;
    padding: 24px;
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
}

.qh-article__sources h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.qh-article__sources ol {
    list-style: decimal;
    margin-left: 20px;
}

.qh-article__sources li {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 8px;
}

.qh-article__sources a {
    color: var(--body);
    text-decoration: underline;
    text-decoration-color: var(--hairline-strong);
}

.qh-article__related {
    margin-top: 64px;
    padding-top: 40px;
    border-top: 1px solid var(--hairline);
}

.qh-article__related h3 {
    font-size: 22px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.1px;
    margin-bottom: 24px;
}

.qh-related-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.qh-related-item {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-md);
    padding: 16px;
    transition: border-color 0.15s;
}

.qh-related-item:hover { border-color: var(--hairline-strong); }

.qh-related-item a {
    font-size: 15px;
    font-weight: 500;
    color: var(--ink);
    display: block;
    margin-bottom: 4px;
}

.qh-related-item a:hover { color: var(--primary); }

.qh-related-item span {
    font-size: 13px;
    color: var(--muted);
}

.qh-page {
    max-width: 780px;
    margin: 0 auto;
    padding: 64px 0 80px;
}

.qh-page h1 {
    font-size: 42px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.8px;
    margin-bottom: 8px;
}

.qh-page__meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--hairline-soft);
}

.qh-page h2 {
    font-size: 22px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.1px;
    margin: 36px 0 12px;
}

.qh-page p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.qh-page ul, .qh-page ol {
    margin: 0 0 16px 20px;
}

.qh-page ul { list-style: disc; }
.qh-page ol { list-style: decimal; }

.qh-page li {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 8px;
}

.qh-form-section {
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
    border-bottom: 1px solid var(--hairline-soft);
    padding: 80px 0;
}

.qh-form-wrap {
    max-width: 560px;
    margin: 0 auto;
}

.qh-form-wrap h2 {
    font-size: 32px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.qh-form-wrap .qh-form__sub {
    font-size: 16px;
    color: var(--body);
    margin-bottom: 32px;
}

.qh-form__group { margin-bottom: 20px; }

.qh-form__group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}

.qh-form__group input,
.qh-form__group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    font-size: 16px;
    font-family: inherit;
    outline: none;
    height: 44px;
    transition: border-color 0.15s;
}

.qh-form__group input:focus,
.qh-form__group textarea:focus {
    border-color: var(--ink);
}

.qh-form__group textarea {
    height: auto;
    min-height: 120px;
    resize: vertical;
}

.qh-form__group input.qh-input-error,
.qh-form__group textarea.qh-input-error {
    border-color: var(--semantic-error);
}

.qh-form__error {
    font-size: 13px;
    color: var(--semantic-error);
    margin-top: 4px;
    display: none;
}

.qh-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--ink);
    color: var(--canvas);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 20px;
    height: 44px;
    border: none;
    border-radius: var(--rounded-md);
    cursor: pointer;
    transition: background 0.15s;
    font-family: inherit;
    min-width: 140px;
}

.qh-btn:hover { background: var(--primary); }
.qh-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.qh-form__status {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    display: none;
}

.qh-form__status--success {
    background: rgba(31, 138, 101, 0.1);
    color: var(--semantic-success);
    border: 1px solid rgba(31, 138, 101, 0.2);
}

.qh-form__status--error {
    background: rgba(207, 45, 86, 0.08);
    color: var(--semantic-error);
    border: 1px solid rgba(207, 45, 86, 0.2);
}

.qh-cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    padding: 16px 24px;
    z-index: 999;
    display: none;
}

.qh-cookie-banner.is-visible { display: block; }

.qh-cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.qh-cookie-inner p {
    flex: 1;
    font-size: 14px;
    line-height: 1.5;
    color: rgba(247, 247, 244, 0.85);
    min-width: 240px;
}

.qh-cookie-inner p a {
    color: var(--canvas);
    text-decoration: underline;
}

.qh-cookie-btns {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.qh-cookie-btn {
    padding: 8px 18px;
    height: 36px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    border: none;
}

.qh-cookie-btn--accept {
    background: var(--primary);
    color: var(--on-primary);
}

.qh-cookie-btn--reject {
    background: transparent;
    color: var(--canvas);
    border: 1px solid rgba(247,247,244,0.3);
}

.qh-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 0;
}

.qh-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.qh-footer__logo {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
}

.qh-footer__tagline {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.qh-footer__col h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.qh-footer__col ul li { margin-bottom: 8px; }

.qh-footer__col ul a {
    font-size: 14px;
    color: var(--body);
    transition: color 0.15s;
}

.qh-footer__col ul a:hover { color: var(--ink); }

.qh-footer__bottom {
    border-top: 1px solid var(--hairline-soft);
    padding: 20px 0 24px;
}

.qh-footer__bottom p {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 4px;
}

.qh-footer__bottom a { color: var(--body); }

.qh-footer__disclaimer { font-size: 12px; color: var(--muted-soft); }

@media (max-width: 1024px) {
    .qh-hero h1 { font-size: 44px; }
    .qh-cards { grid-template-columns: repeat(2, 1fr); }
    .qh-footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .qh-nav__menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 12px 0;
    }

    .qh-nav__menu.is-open { display: flex; }

    .qh-nav__menu li { width: 100%; }

    .qh-nav__menu a {
        display: block;
        padding: 12px 24px;
        font-size: 15px;
    }

    .qh-nav__burger { display: flex; }

    .qh-hero { padding: 48px 0 40px; }
    .qh-hero h1 { font-size: 32px; letter-spacing: -0.8px; }
    .qh-hero__img img { height: 260px; }
    .qh-section { padding: 48px 0; }
    .qh-section__title { font-size: 28px; }
    .qh-cards { grid-template-columns: 1fr; }
    .qh-facts { grid-template-columns: 1fr; }
    .qh-two-col { grid-template-columns: 1fr; }
    .qh-two-col__img img { height: 240px; }
    .qh-article__title { font-size: 28px; }
    .qh-article__lead { font-size: 17px; }
    .qh-article__img img { height: 260px; }
    .qh-related-list { grid-template-columns: 1fr; }
    .qh-footer__inner { grid-template-columns: 1fr; gap: 28px; }
    .qh-cookie-inner { flex-direction: column; align-items: flex-start; }
    .qh-page h1 { font-size: 30px; }
}

@media (max-width: 480px) {
    .qh-container { padding: 0 16px; }
    .qh-hero h1 { font-size: 26px; }
    .qh-article__title { font-size: 24px; }
}