Ниже полный, собранный и проверенный CSS, с работающим золотым ховером в портфолио и без синтаксических ошибок:

css
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: #f0e68c;
    background: #000;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ================= ШАПКА ================= */

header {
    background: linear-gradient(135deg, #1a1a1a 0%, #000 100%);
    color: #f0e68c;
    padding: 0.4rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid #b8860b;
    box-shadow: 0 2px 20px rgba(248,230,140,0.3);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Левый блок: логотип + текст рядом */
.header-left .logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-left .logo img {
    height: 140px;
    width: auto;
    margin-top: -20px;
    filter: drop-shadow(0 0 10px rgba(255,215,0,0.5));
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(45deg, #ffd700, #f0e68c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Правый блок: меню + бургер */
.header-right {
    display: flex;
    align-items: center;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: #f0e68c;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.nav-links a:hover {
    color: #ffd700;
    transform: translateY(-2px);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: #ffd700;
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.burger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.burger span {
    width: 25px;
    height: 3px;
    background: #f0e68c;
    transition: 0.3s;
    border-radius: 2px;
}

.burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.burger.active span:nth-child(2) {
    opacity: 0;
}

.burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -5px);
}

/* ================= HERO ================= */

.hero {
    background: linear-gradient(135deg, #111 0%, #000 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 110px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(255,215,0,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,215,0,0.05) 0%, transparent 50%);
    animation: shimmer 6s infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    color: #ffd700;
    animation: fadeInUp 1s ease;
}

.hero-offer,
.hero-subtext {
    max-width: 600px;
    margin: 0.75rem auto 0;
    font-size: 1.3rem;
    animation: fadeInUp 1s ease 0.2s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.cta-btn {
    background: linear-gradient(135deg, #ffd700, #daa520);
    color: #000;
    padding: 1.2rem 3rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    display: inline-block;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(255,215,0,0.4);
    animation: fadeInUp 1s ease 0.4s both;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255,215,0,0.6);
}

/* ================= ОБЩИЕ БЛОКИ ================= */

section {
    padding: 90px 0;
}

h2 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.8rem);
    margin-bottom: 3.5rem;
    color: #ffd700;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #ffd700, #daa520);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.page-intro.services {
    padding-top: 10rem;
    padding-bottom: 1.5rem;
}

.services {
    padding-top: 1.5rem;
    padding-bottom: 3rem;
    background: #111;
}

section.services {
    padding-bottom: 2rem;
}

.page-intro.services h1 {
    text-align: center;
}

.page-intro {
    padding-top: 9rem;
    padding-bottom: 3rem;
}

section.about {
    padding-top: 2rem;
    padding-bottom: 3rem;
}

#portfolio.page-intro {
    padding-top: 10.5rem;
    padding-bottom: 3rem;
}

#portfolio .portfolio-grid {
    margin-top: 2rem;
}

#calculator .page-intro {
    padding-top: 3rem;
    padding-bottom: 2rem;
}

/* Отступ для блока отзывов под фиксированной шапкой */
#reviews,
section.reviews {
    padding-top: 6.5rem;
}

.about-links a {
    color: inherit;
    text-decoration: underline;
    font-weight: 500;
}

.about-links a:hover {
    text-decoration: underline;
    opacity: 0.9;
}

.about a {
    color: inherit;
    text-decoration: underline;
}

.about a:hover {
    text-decoration: underline;
    opacity: 0.9;
}

/* ================= УСЛУГИ ================= */

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    justify-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.service-card {
    background: #1a1a1a;
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid #333;
    text-align: center;
    width: 100%;
    max-width: 350px;
}

.service-card.center-row {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: 400px;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(255,215,0,0.2);
    border-color: #ffd700;
    transition: all 0.3s;
}

.service-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.service-card h3 {
    color: #ffd700;
    margin: 1rem 0 0.5rem 0;
}

.services .service-grid {
    font-size: 0.95rem;
}

.services .service-card h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.services .service-card p {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ================= ПОРТФОЛИО ================= */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    justify-items: center;
}

.portfolio-item {
    position: relative;
    border-radius: 25px;
    overflow: hidden;
    border: 1px solid rgba(51,51,51,0.5);
    transition: transform 0.4s, box-shadow 0.4s;
    cursor: pointer;
    width: 100%;
    max-width: 400px;
}

.portfolio-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
    transition: transform 0.4s;
}

/* Подпись выезжает снизу с золотым затемнением */
.portfolio-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    transform: translateY(100%);
    background: linear-gradient(
        135deg,
        rgba(184, 134, 11, 0.6),
        rgba(0, 0, 0, 0.9)
    );
    color: #ffd700;
    padding: 0.8rem 1rem;
    text-align: center;
    font-size: 0.95rem;
    transition: transform 0.3s ease;
}

/* Эффект при наведении: подпись выезжает, картинка чуть увеличивается */
.portfolio-item:hover .portfolio-caption,
.portfolio-item:focus-within .portfolio-caption {
    transform: translateY(0);
}

.portfolio-item:hover img,
.portfolio-item:focus-within img {
    transform: scale(1.05);
}

/* Модалка зума работ */

.work-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    inset: 0;
    background: rgba(0,0,0,0.9);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 20px;
}

.work-modal.show {
    display: flex;
}

.work-modal__img {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
}

.work-modal__caption {
    margin-top: 15px;
    color: #f0e68c;
    text-align: center;
    max-width: 90vw;
}

.work-modal__close {
    position: absolute;
    right: 25px;
    top: 20px;
    color: #fff;
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
}

/* ================= КАЛЬКУЛЯТОР ================= */

.calculator {
    background: rgba(26,26,26,0.8);
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem;
    border-radius: 30px;
    border: 1px solid rgba(184,134,11,0.3);
    backdrop-filter: blur(15px);
}

.calc-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.7rem;
    color: #ffd700;
    font-weight: 600;
    font-size: 0.95rem;
}

input,
select {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(51,51,51,0.5);
    border-radius: 15px;
    background: rgba(17,17,17,0.9);
    color: #f0e68c;
    font-size: 1rem;
    transition: all 0.3s;
}

input:focus,
select:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 0 3px rgba(255,215,0,0.2);
}

.calc-result {
    background: linear-gradient(135deg, #ffd700, #daa520);
    color: #000;
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    font-size: 2rem;
    font-weight: bold;
    margin-top: 2rem;
    box-shadow: 0 15px 40px rgba(255,215,0,0.4);
}

/* ================= ФОРМЫ ================= */

.form-container {
    background: rgba(26,26,26,0.8);
    max-width: 650px;
    margin: 0 auto;
    padding: 3rem;
    border-radius: 30px;
    border: 1px solid rgba(184,134,11,0.3);
    backdrop-filter: blur(15px);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1.2rem;
    border: 2px solid rgba(51,51,51,0.5);
    border-radius: 15px;
    background: rgba(17,17,17,0.9);
    color: #f0e68c;
    font-size: 1rem;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 0 3px rgba(255,215,0,0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    background: linear-gradient(135deg, #ffd700, #daa520);
    color: #000;
    padding: 1.5rem;
    border: none;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(255,215,0,0.4);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(255,215,0,0.6);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.success-msg {
    background: linear-gradient(135deg, #90EE90, #32CD32);
    color: #000;
    padding: 1.5rem;
    border-radius: 15px;
    margin-top: 1.5rem;
    display: none;
    text-align: center;
    font-weight: bold;
    animation: bounceIn 0.6s;
}

.error-msg {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: #fff;
    padding: 1.5rem;
    border-radius: 15px;
    margin-top: 1.5rem;
    display: none;
    text-align: center;
    font-weight: bold;
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* ================= ОТЗЫВЫ ================= */

.reviews-carousel {
    margin-bottom: 40px;
    text-align: center;
}

.reviews-slider {
    position: relative;
    overflow: hidden;
    min-height: 140px;
}

.review-slide {
    display: none;
    transition: opacity 0.4s ease;
}

.review-slide.active {
    display: block;
}

.reviews-dots {
    text-align: center;
    margin-top: 15px;
}

.review-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    margin: 0 5px;
    border-radius: 50%;
    background: #777;
    cursor: pointer;
    transition: background 0.3s;
}

.review-dot.active {
    background: #fff;
}

/* ================= ФУТЕР ================= */

footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #000 100%);
    color: #f0e68c;
    text-align: center;
    padding: 4rem 0 2rem;
    border-top: 2px solid #b8860b;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.social-links a {
    color: #f0e68c;
    font-size: 2rem;
    transition: all 0.3s;
    padding: 1rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.social-links a:hover {
    color: #ffd700;
    transform: translateY(-5px);
    background: rgba(255,215,0,0.1);
}

/* Размер иконок */
.social-links a img.social-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

/* ================= АДАПТИВ ================= */

@media (max-width: 768px) {
    .header-inner {
        flex-direction: row;
        align-items: center;
    }

    .header-nav {
        gap: 1rem;
    }

    .burger {
        display: flex;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(0,0,0,0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-top: 1px solid #333;
    }

    .nav-links.active {
        display: flex;
    }

    .calc-row {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .portfolio-item {
        max-width: 100%;
    }

    section {
        padding: 60px 0;
    }
}

/* Отступы для якорей "Отзывы" и "Запись" под фиксированной шапкой */

#otzyvy {
    padding-top: 180px;
}

#otzyvy h1 {
    text-align: center;
    margin-bottom: 2rem;
}

#zapis {
    padding-top: 180px;
}

#zapis h1,
#zapis-na-zamer h1 {
    text-align: center;
    margin-bottom: 2rem;
}

#zapis-na-zamer .container {
    text-align: center;
}

/* Ссылки в блоке контактов в общем стиле */
#zapis-na-zamer a {
    color: inherit;
    text-decoration: underline;
    font-weight: 500;
}

#zapis-na-zamer a:hover {
    text-decoration: underline;
    opacity: 0.9;
}

/* Центрируем блок "Контакты" на странице записи */
#zapis-na-zamer h2 {
    text-align: center;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

#zapis-na-zamer p {
    text-align: center;
}

#zapis-na-zamer p a {
    color: inherit;
    text-decoration: underline;
    font-weight: 500;
}

#zapis-na-zamer p a:hover {
    text-decoration: underline;
    opacity: 0.9;
}