/* Trang Giới thiệu — tông màu trùng màu mặc định của thiệp (kem, hồng đất, chữ nâu). */
.about-page {
    --ab-cream: #fdfaf6;
    --ab-blush: #f6ebe6;
    --ab-rose: #a9746e;
    --ab-rose-dark: #7f514b;
    --ab-gold: #c4a265;
    --ab-text: #4a3f35;
    --ab-muted: #7b6f66;
    --ab-line: #eadfd8;
    color: var(--ab-text);
    padding-bottom: 1rem;
}

.about-page h1, .about-page h2, .about-page h3 {
    font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
    color: var(--ab-text);
}

.about-kicker {
    text-transform: uppercase;
    letter-spacing: .14em;
    font-size: .78rem;
    font-weight: 600;
    color: var(--ab-rose);
    margin-bottom: .5rem;
}

/* ===== Hero ===== */
.about-hero {
    background: radial-gradient(circle at 85% 15%, #fff 0, transparent 45%), linear-gradient(135deg, var(--ab-cream) 0%, var(--ab-blush) 100%);
    border: 1px solid var(--ab-line);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    margin-bottom: 2rem;
    overflow: hidden;
}

.about-title {
    font-size: clamp(2.1rem, 5vw, 3.4rem);
    font-weight: 700;
    line-height: 1.12;
    margin-bottom: 1rem;
}

.about-title span {
    color: var(--ab-rose);
    font-style: italic;
}

.about-lead {
    font-size: 1.12rem;
    color: var(--ab-muted);
    line-height: 1.7;
    margin-bottom: 1.6rem;
    max-width: 34rem;
}

.about-btn-primary {
    background: var(--ab-rose);
    border-color: var(--ab-rose);
    color: #fff;
}

.about-btn-primary:hover, .about-btn-primary:focus {
    background: var(--ab-rose-dark);
    border-color: var(--ab-rose-dark);
    color: #fff;
}

.about-btn-outline {
    border: 1px solid var(--ab-rose);
    color: var(--ab-rose-dark);
    background: #fff;
}

.about-btn-outline:hover, .about-btn-outline:focus {
    background: var(--ab-blush);
    color: var(--ab-rose-dark);
}

.about-hero-img {
    position: relative;
}

.about-hero-img::before {
    content: "";
    position: absolute;
    inset: 14px -14px -14px 14px;
    border: 2px solid var(--ab-gold);
    border-radius: 18px;
    opacity: .55;
}

.about-hero-img img {
    position: relative;
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(122, 81, 75, .18);
}

/* ===== Số liệu ===== */
.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
}

.about-stat {
    background: #fff;
    border: 1px solid var(--ab-line);
    border-radius: 16px;
    padding: 1.2rem 1rem;
    text-align: center;
}

.about-stat strong {
    display: block;
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 2rem;
    color: var(--ab-rose);
    line-height: 1.1;
}

.about-stat span {
    font-size: .9rem;
    color: var(--ab-muted);
}

/* ===== Khung chung ===== */
.about-section {
    margin-bottom: 3.5rem;
}

.about-heading {
    text-align: center;
    margin-bottom: 2rem;
}

.about-heading h2 {
    font-size: clamp(1.6rem, 3.4vw, 2.2rem);
    font-weight: 700;
    margin: 0;
}

.about-heading h2::after {
    content: "";
    display: block;
    width: 56px;
    height: 2px;
    background: var(--ab-gold);
    margin: .9rem auto 0;
}

/* ===== Dịch vụ ===== */
.about-service {
    height: 100%;
    background: #fff;
    border: 1px solid var(--ab-line);
    border-radius: 20px;
    padding: 2rem;
    transition: transform .25s ease, box-shadow .25s ease;
}

.about-service:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 34px rgba(122, 81, 75, .12);
}

.about-service-icon {
    font-size: 2.2rem;
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: var(--ab-blush);
    margin-bottom: 1rem;
}

.about-service h3 {
    font-size: 1.45rem;
    font-weight: 700;
}

.about-service p {
    color: var(--ab-muted);
    line-height: 1.7;
}

.about-service ul {
    padding-left: 0;
    list-style: none;
    margin-bottom: 1.2rem;
}

.about-service li {
    position: relative;
    padding-left: 1.6rem;
    margin-bottom: .4rem;
}

.about-service li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--ab-rose);
    font-weight: 700;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    margin-bottom: 1rem;
}

.about-tags a {
    font-size: .82rem;
    padding: .2rem .7rem;
    border-radius: 999px;
    border: 1px solid var(--ab-line);
    background: var(--ab-cream);
    color: var(--ab-rose-dark);
    text-decoration: none;
}

.about-tags a:hover {
    background: var(--ab-blush);
}

.about-link {
    color: var(--ab-rose-dark);
    font-weight: 600;
    text-decoration: none;
}

.about-link:hover {
    color: var(--ab-rose);
}

/* ===== Tính năng ===== */
.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.about-feature {
    background: var(--ab-cream);
    border: 1px solid var(--ab-line);
    border-radius: 16px;
    padding: 1.3rem 1.2rem;
}

.about-feature-icon {
    font-size: 1.6rem;
    margin-bottom: .5rem;
}

.about-feature h3 {
    font-size: 1.08rem;
    font-weight: 700;
    margin-bottom: .35rem;
}

.about-feature p {
    font-size: .92rem;
    color: var(--ab-muted);
    line-height: 1.6;
    margin: 0;
}

/* ===== Quy trình ===== */
.about-steps {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    counter-reset: none;
}

.about-steps li {
    position: relative;
    text-align: center;
    padding: 0 .5rem;
}

.about-steps li:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 26px;
    left: calc(50% + 34px);
    width: calc(100% - 68px + 1.25rem);
    border-top: 2px dashed var(--ab-gold);
    opacity: .6;
}

.about-step-no {
    display: inline-grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--ab-rose);
    color: #fff;
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: .8rem;
    box-shadow: 0 0 0 6px var(--ab-blush);
}

.about-steps h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.about-steps p {
    font-size: .92rem;
    color: var(--ab-muted);
    margin: 0;
}

/* ===== Mẫu nổi bật ===== */
.about-sample {
    position: relative;
    display: block;
    aspect-ratio: 3 / 4;
    border-radius: 18px;
    overflow: hidden;
    background: var(--ab-blush);
    text-decoration: none;
    box-shadow: 0 10px 26px rgba(122, 81, 75, .14);
}

.about-sample img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}

.about-sample:hover img {
    transform: scale(1.06);
}

.about-sample::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(40, 25, 20, .72) 100%);
}

.about-sample-name, .about-sample-cta {
    position: absolute;
    left: 1rem;
    right: 1rem;
    z-index: 1;
    color: #fff;
}

.about-sample-name {
    bottom: 2.3rem;
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.15rem;
    font-weight: 600;
}

.about-sample-cta {
    bottom: 1rem;
    font-size: .85rem;
    opacity: .85;
}

/* ===== Vì sao chọn ===== */
.about-why > div {
    border-left: 2px solid var(--ab-gold);
    padding-left: 1.1rem;
}

.about-why h3 {
    font-size: 1.12rem;
    font-weight: 700;
}

.about-why p {
    color: var(--ab-muted);
    font-size: .94rem;
    margin: 0;
}

/* ===== Hỏi đáp ===== */
.about-faq {
    max-width: 820px;
    margin: 0 auto;
}

.about-faq details {
    background: #fff;
    border: 1px solid var(--ab-line);
    border-radius: 14px;
    padding: 0 1.2rem;
    margin-bottom: .75rem;
}

.about-faq summary {
    cursor: pointer;
    list-style: none;
    padding: 1rem 2rem 1rem 0;
    font-weight: 600;
    position: relative;
}

.about-faq summary::-webkit-details-marker {
    display: none;
}

.about-faq summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    color: var(--ab-rose);
    transition: transform .2s ease;
}

.about-faq details[open] summary::after {
    transform: translateY(-50%) rotate(45deg);
}

.about-faq details p {
    color: var(--ab-muted);
    line-height: 1.7;
    padding-bottom: 1rem;
    margin: 0;
}

/* ===== Liên hệ ===== */
.about-contact {
    background: linear-gradient(135deg, var(--ab-rose) 0%, var(--ab-rose-dark) 100%);
    color: #fff;
    border-radius: 24px;
    padding: 2.5rem;
}

.about-contact h2 {
    color: #fff;
    font-size: clamp(1.6rem, 3.4vw, 2.1rem);
    font-weight: 700;
}

.about-contact p {
    color: rgba(255, 255, 255, .88);
}

.about-contact-list {
    list-style: none;
    padding: 1.2rem 1.4rem;
    margin: 0;
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .25);
    border-radius: 16px;
}

.about-contact-list li {
    padding: .45rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, .18);
    word-break: break-word;
}

.about-contact-list li:last-child {
    border-bottom: 0;
}

.about-contact-list span {
    display: inline-block;
    min-width: 76px;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    opacity: .75;
}

.about-contact-list a {
    color: #fff;
    font-weight: 600;
}

/* ===== Điện thoại ===== */
@media (max-width: 991.98px) {
    .about-steps {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 2rem;
    }

    .about-steps li::after {
        display: none;
    }
}

@media (max-width: 575.98px) {
    .about-hero {
        padding: 2rem 1.25rem;
        border-radius: 18px;
    }

    .about-hero-img::before {
        inset: 10px -8px -8px 10px;
    }

    .about-contact {
        padding: 1.75rem 1.25rem;
        border-radius: 18px;
    }

    .about-service {
        padding: 1.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .about-service, .about-sample img {
        transition: none;
    }
}