/* ==========================================================
   ALTVP — страница услуги «Инженерные изыскания»
   Современная типографика, чистая сетка, фирменные цвета.
   Скругления не используются — в соответствии со стандартом ALTVP.
   ========================================================== */

.altvp-project-page {
    --altvp-red: #E30016;
    --altvp-blue: #009EE0;
    --altvp-navy: #102A83;
    --altvp-border: #DCE6F2;
    --altvp-muted: #6B7B9A;
    --altvp-soft: #F4F8FC;
    --altvp-white: #FFFFFF;
    background: var(--color-background, #FFFFFF);
    color: var(--color-text, var(--altvp-navy));
}

/* Первый экран */
.altvp-project-page__top {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: center;
    padding: clamp(48px, 6vw, 88px) 0 clamp(32px, 4vw, 56px);
}

.altvp-project-page__info {
    max-width: 760px;
}

.altvp-project-page__title {
    max-width: 780px;
    margin: 0;
    color: var(--altvp-navy);
    font-size: clamp(34px, 3.4vw, 52px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -.035em;
    text-wrap: balance;
}

.altvp-project-page__image-wrap {
    position: relative;
    min-width: 0;
    width: 100%;
    overflow: hidden;
    aspect-ratio: 2 / 1;
    background: transparent;
}

/* У изображения без фона не добавляем декоративную подложку или линию. */

.altvp-project-page__image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: transparent;
    transition: transform .65s cubic-bezier(.2, .65, .3, 1);
}

@media (hover: hover) and (pointer: fine) {
    .altvp-project-page__image-wrap:hover .altvp-project-page__image {
        transform: scale(1.025);
    }
}

/* Основной текст и заголовки */
.altvp-project-page__body {
    padding: 24px 0 clamp(64px, 8vw, 112px);
}

.altvp-project-page__text {
    max-width: 920px;
}

.altvp-project-page__text p {
    margin: 0 0 24px;
    color: #354766;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.8;
}

.altvp-project-page__text p:last-child {
    margin-bottom: 0;
}

.altvp-project-page__text h2 {
    position: relative;
    margin: clamp(48px, 6vw, 76px) 0 26px;
    color: var(--altvp-navy);
    font-size: clamp(27px, 2.6vw, 38px);
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -.025em;
    text-wrap: balance;
}

.altvp-project-page__text h2::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    margin-top: 17px;
    background: var(--altvp-red);
}

.altvp-project-page__text h3 {
    margin: 34px 0 12px;
    color: var(--altvp-navy);
    font-size: clamp(20px, 2vw, 25px);
    font-weight: 650;
    line-height: 1.3;
}

.altvp-project-page__text h2 + p,
.altvp-project-page__text h3 + p {
    margin-top: 0;
}

/* Списки */
.altvp-project-page__text ul,
.altvp-project-page__text ol {
    margin: 0 0 30px;
    padding: 0;
    list-style: none;
}

.altvp-project-page__text li {
    position: relative;
    margin: 0 0 12px;
    padding: 0 0 0 28px;
    color: #354766;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.65;
}

.altvp-project-page__text li::before {
    content: "";
    position: absolute;
    top: .65em;
    left: 1px;
    width: 8px;
    height: 8px;
    background: var(--altvp-blue);
}

.altvp-project-page__text li:last-child {
    margin-bottom: 0;
}

.altvp-project-page__text strong {
    color: var(--altvp-navy);
    font-weight: 700;
}

.altvp-project-page__text a:not(.btn) {
    color: #007FB7;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: color .2s ease;
}

.altvp-project-page__text a:not(.btn):hover {
    color: var(--altvp-red);
}

/* Галерея */
.altvp-project-page__gallery {
    margin-top: clamp(52px, 7vw, 88px);
    padding-top: clamp(32px, 4vw, 48px);
    border-top: 1px solid var(--altvp-border);
}

.altvp-project-page__gallery-title {
    margin: 0 0 28px;
    color: var(--altvp-navy);
    font-size: clamp(26px, 2.5vw, 34px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -.02em;
}

.altvp-project-page__gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.altvp-project-page__gallery-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--altvp-soft);
}

.altvp-project-page__gallery-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .55s cubic-bezier(.2, .65, .3, 1);
}

@media (hover: hover) and (pointer: fine) {
    .altvp-project-page__gallery-item:hover .altvp-project-page__gallery-image {
        transform: scale(1.035);
    }
}

/* Кнопка */
.altvp-project-page .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 15px 28px;
    border: 1px solid var(--altvp-red, #E30016);
    border-radius: 0;
    background: var(--altvp-red, #E30016);
    color: #fff;
    font-size: 16px;
    font-weight: 650;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}

.altvp-project-page .btn:hover,
.altvp-project-page .btn:focus-visible {
    border-color: #B90012;
    background: #B90012;
    color: #fff;
}

.altvp-project-page .btn:active {
    transform: translateY(1px);
}

/* Телефон — без мигания, с понятным акцентом */
.altvp-project-page__text a[href^="tel:"] {
    color: var(--altvp-red);
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.altvp-project-page__text a[href^="tel:"]:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ==========================================================
   FAQ — отдельные аккуратные строки-аккордеоны
   Работает с нативными <details>/<summary>, JavaScript не нужен.
   ========================================================== */
.altvp-faq {
    --faq-blue: #009EE0;
    --faq-dark: #102A83;
    --faq-border: #DCE6F2;
    --faq-muted: #6B7B9A;
    --faq-accent: #E30016;
    --faq-soft: #F5F8FC;

    width: 100%;
    padding: 5px 0 30px;
    background: #F8FAFD;
    color: var(--faq-dark);
}

.altvp-faq,
.altvp-faq * {
    box-sizing: border-box;
}

.altvp-faq__inner {
    width: min(100% - 48px, 1200px);
    margin: 0 auto;
}

.altvp-faq__title {
    max-width: 800px;
    margin: 0 0 30px;
    color: var(--faq-dark);
    font-size: clamp(29px, 3vw, 40px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -.03em;
    text-wrap: balance;
}

.altvp-faq__list {
    display: grid;
    gap: 10px;
    width: 100%;
}

.altvp-faq__item {
    min-width: 0;
    margin: 0;
    border: 1px solid var(--faq-border);
    border-left: 3px solid transparent;
    background: #fff;
    transition: border-color .2s ease, background-color .2s ease;
}

.altvp-faq__item:hover {
    border-color: #B8D7EB;
    background: #fff;
}

.altvp-faq__item[open] {
    border-color: #B8D7EB;
    border-left-color: var(--faq-blue);
    background: #fff;
}

.altvp-faq__question {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 76px;
    margin: 0;
    padding: 22px 78px 22px 24px;
    color: var(--faq-dark);
    font-size: 18px;
    font-weight: 650;
    line-height: 1.45;
    cursor: pointer;
    list-style: none;
    transition: color .2s ease;
}

.altvp-faq__question::-webkit-details-marker {
    display: none;
}

.altvp-faq__question::marker {
    content: "";
}

.altvp-faq__question::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 22px;
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border: 1px solid #B8D7EB;
    background: #F4FAFE;
    color: var(--faq-blue);
    font-size: 23px;
    font-weight: 400;
    line-height: 1;
    transform: translateY(-50%);
    transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}

.altvp-faq__item[open] .altvp-faq__question {
    color: var(--faq-blue);
}

.altvp-faq__item[open] .altvp-faq__question::after {
    content: "−";
    border-color: var(--faq-accent);
    background: var(--faq-accent);
    color: #fff;
}

.altvp-faq__question:focus-visible {
    outline: 2px solid var(--faq-blue);
    outline-offset: -4px;
}

.altvp-faq__answer {
    padding: 0 78px 24px 24px;
    animation: altvp-faq-reveal .22s ease both;
}

.altvp-faq__answer p {
    max-width: 900px;
    margin: 0;
    color: #43536F;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.8;
}

@keyframes altvp-faq-reveal {
    from { opacity: 0; transform: translateY(-3px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Ненавязчивое появление контента — без скрытия страницы при отключённом JS */
.altvp-project-page__title,
.altvp-project-page__text p,
.altvp-project-page__gallery-item {
    opacity: 1;
    transform: none;
}

/* Адаптивность */
@media (max-width: 1024px) {
    .altvp-project-page__top {
        grid-template-columns: minmax(0, 1.1fr) minmax(260px, .9fr);
        gap: 32px;
        padding-top: 56px;
    }

    .altvp-project-page__body {
        padding-bottom: 76px;
    }

    .altvp-project-page__text {
        max-width: 100%;
    }

    .altvp-project-page__gallery-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }

    .altvp-faq__inner {
        width: min(100% - 40px, 1200px);
    }

    .altvp-faq__question {
        min-height: 70px;
        padding: 20px 68px 20px 22px;
        font-size: 17px;
    }

    .altvp-faq__question::after {
        right: 18px;
    }

    .altvp-faq__answer {
        padding: 0 68px 22px 22px;
    }
}

@media (max-width: 767px) {
    .altvp-project-page__top {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 40px 0 28px;
    }

    .altvp-project-page__info {
        order: 1;
    }

    .altvp-project-page__image-wrap {
        order: 2;
        aspect-ratio: 2 / 1;
    }

    .altvp-project-page__title {
        font-size: clamp(30px, 7vw, 38px);
        line-height: 1.12;
    }

    .altvp-project-page__body {
        padding: 12px 0 64px;
    }

    .altvp-project-page__text p,
    .altvp-project-page__text li {
        font-size: 16px;
        line-height: 1.75;
    }

    .altvp-project-page__text h2 {
        margin-top: 48px;
        margin-bottom: 22px;
    }

    .altvp-project-page__text h3 {
        margin-top: 28px;
    }

    .altvp-project-page__gallery-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .altvp-faq {
        padding: 42px 0;
    }

    .altvp-faq__inner {
        width: calc(100% - 32px);
    }

    .altvp-faq__title {
        margin-bottom: 22px;
        font-size: 29px;
    }

    .altvp-faq__list {
        gap: 8px;
    }

    .altvp-faq__question {
        min-height: 66px;
        padding: 18px 58px 18px 16px;
        font-size: 16px;
        line-height: 1.45;
    }

    .altvp-faq__question::after {
        right: 12px;
        width: 30px;
        height: 30px;
        font-size: 21px;
    }

    .altvp-faq__answer {
        padding: 0 16px 20px;
    }

    .altvp-faq__answer p {
        font-size: 15px;
        line-height: 1.75;
    }

    .altvp-project-page .btn {
        width: 100%;
        min-height: 52px;
        padding: 14px 18px;
        font-size: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .altvp-project-page__image,
    .altvp-project-page__gallery-image,
    .altvp-faq__item,
    .altvp-faq__question,
    .altvp-faq__question::after,
    .altvp-faq__answer,
    .altvp-project-page .btn {
        transition: none !important;
        animation: none !important;
    }
}