/* ============================================================
   腾龙 TAMRON - 株式会社腾龙 官方网站
   专业镜头制造商 | Since 1950 | 东京证券交易所上市
   SEO 优化 · 语义化 · 响应式
============================================================ */

/* ---------- 设计令牌 (CSS Variables) ---------- */
:root {
    --gold: #C9A24B;
    --gold-light: #E0BE6A;
    --gold-dark: #A0822A;
    --dark: #0D0D0D;
    --dark-2: #161622;
    --dark-3: #1F1F2E;
    --gray: #8A8A9A;
    --gray-light: #C4C4D0;
    --white: #FFFFFF;
    --section-pad: 100px;
    --max-width: 1280px;
    --radius: 12px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    background: var(--dark);
    color: var(--gray-light);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4 {
    color: var(--white);
    font-weight: 700;
    line-height: 1.3;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title .en {
    display: block;
    font-size: 14px;
    letter-spacing: 6px;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title h2 {
    font-size: clamp(28px, 4vw, 44px);
}

.section-title .sub {
    color: var(--gray);
    margin-top: 16px;
    font-size: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--dark);
    box-shadow: 0 8px 24px rgba(201, 162, 75, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(201, 162, 75, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--gold);
    border: 2px solid var(--gold);
}

.btn-outline:hover {
    background: var(--gold);
    color: var(--dark);
}

/* ============================================================
   Header & Navigation
============================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    background: rgba(13, 13, 13, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(13, 13, 13, 0.95);
    border-bottom-color: rgba(201, 162, 75, 0.2);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo img {
    width: 44px;
    height: 44px;
}

.nav-logo .brand {
    font-size: 20px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 2px;
}

.nav-logo .brand span {
    color: var(--gold);
}

.nav-menu {
    display: flex;
    gap: 36px;
    align-items: center;
}

.nav-menu a {
    color: var(--gray-light);
    font-size: 15px;
    position: relative;
    padding: 4px 0;
}

.nav-menu a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--gold);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
}

/* ============================================================
   Hero Section
============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url("../images/hero-bg.jpg");
    background-size: cover;
    background-position: center;
    opacity: 0.5;
}

.hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(13,13,13,0.3) 0%, rgba(13,13,13,0.85) 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    border: 1px solid rgba(201, 162, 75, 0.5);
    border-radius: 30px;
    color: var(--gold);
    font-size: 13px;
    letter-spacing: 2px;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 900;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.hero h1 .gold {
    color: var(--gold);
}

.hero .tagline {
    font-size: clamp(16px, 2.5vw, 22px);
    color: var(--gray-light);
    margin-bottom: 16px;
    letter-spacing: 3px;
}

.hero .slogan {
    font-size: clamp(14px, 2vw, 18px);
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

/* 居中注册/联系按钮区域 */
.hero-contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.hero-contact .label {
    font-size: 13px;
    color: var(--gray);
    letter-spacing: 2px;
}

.btn-contact-main {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--dark);
    padding: 16px 48px;
    font-size: 17px;
    font-weight: 700;
    border-radius: 40px;
    box-shadow: 0 8px 30px rgba(201, 162, 75, 0.4);
    animation: pulse 2.5s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 8px 30px rgba(201, 162, 75, 0.4); }
    50% { box-shadow: 0 8px 50px rgba(201, 162, 75, 0.7); }
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: clamp(30px, 6vw, 80px);
    flex-wrap: wrap;
    margin-top: 40px;
}

.hero-stats .stat {
    text-align: center;
}

.hero-stats .num {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    color: var(--gold);
    line-height: 1;
}

.hero-stats .desc {
    font-size: 14px;
    color: var(--gray);
    margin-top: 8px;
}

/* ============================================================
   About Section
============================================================ */
.about {
    padding: var(--section-pad) 0;
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-img {
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
}

.about-img img {
    width: 100%;
    transition: transform 0.6s ease;
}

.about-img:hover img {
    transform: scale(1.05);
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--white);
}

.about-text p {
    color: var(--gray);
    margin-bottom: 20px;
    font-size: 16px;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 36px;
}

.value-card {
    text-align: center;
    padding: 24px 16px;
    background: var(--dark-3);
    border-radius: var(--radius);
    border: 1px solid rgba(201, 162, 75, 0.1);
    transition: var(--transition);
}

.value-card:hover {
    border-color: var(--gold);
    transform: translateY(-5px);
}

.value-card .icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.value-card h4 {
    font-size: 16px;
    color: var(--gold);
    margin-bottom: 8px;
}

.value-card p {
    font-size: 13px;
    color: var(--gray);
    margin: 0;
}

/* ============================================================
   Products / Lenses Section
============================================================ */
.products {
    padding: var(--section-pad) 0;
}

.product-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.filter-btn {
    padding: 8px 24px;
    border-radius: 30px;
    border: 1px solid rgba(201, 162, 75, 0.3);
    background: transparent;
    color: var(--gray-light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--gold);
    color: var(--dark);
    border-color: var(--gold);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--dark-2);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(201, 162, 75, 0.5);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.product-card .img-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1;
}

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.product-card:hover img {
    transform: scale(1.1);
}

.product-card .category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 14px;
    background: rgba(201, 162, 75, 0.9);
    color: var(--dark);
    font-size: 11px;
    font-weight: 700;
    border-radius: 20px;
    letter-spacing: 1px;
}

.product-card .info {
    padding: 24px;
}

.product-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.product-card .spec {
    color: var(--gold);
    font-size: 13px;
    margin-bottom: 12px;
}

.product-card .desc {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.6;
}

/* ============================================================
   Timeline / History Section
============================================================ */
.history {
    padding: var(--section-pad) 0;
    background: var(--dark-2);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--gold), transparent);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gold);
    border: 4px solid var(--dark);
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(201, 162, 75, 0.2);
}

.timeline-content {
    width: 45%;
    padding: 28px;
    background: var(--dark-3);
    border-radius: var(--radius);
    border: 1px solid rgba(201, 162, 75, 0.1);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--gold);
}

.timeline-year {
    font-size: 32px;
    font-weight: 900;
    color: var(--gold);
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--gray);
    font-size: 14px;
}

.timeline-img {
    width: 45%;
    border-radius: var(--radius);
    overflow: hidden;
}

.timeline-img img {
    width: 100%;
    transition: transform 0.5s ease;
}

.timeline-img:hover img {
    transform: scale(1.05);
}

/* ============================================================
   News Section
============================================================ */
.news {
    padding: var(--section-pad) 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.news-card {
    background: var(--dark-2);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
    border-color: rgba(201, 162, 75, 0.4);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.news-card .img-wrap {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.news-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover img {
    transform: scale(1.08);
}

.news-card .body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}

.news-meta .date {
    font-size: 13px;
    color: var(--gray);
}

.news-meta .tag {
    padding: 2px 10px;
    background: rgba(201, 162, 75, 0.15);
    color: var(--gold);
    font-size: 11px;
    border-radius: 12px;
    font-weight: 600;
}

.news-card h3 {
    font-size: 17px;
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.news-card .read-more {
    margin-top: 16px;
    color: var(--gold);
    font-size: 14px;
    font-weight: 600;
}

.news-card .read-more:hover {
    color: var(--gold-light);
}

/* ============================================================
   Technology Section
============================================================ */
.tech {
    padding: var(--section-pad) 0;
    background: var(--dark-2);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 32px;
}

.tech-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--dark-3);
    border-radius: var(--radius);
    border: 1px solid rgba(201, 162, 75, 0.08);
    transition: var(--transition);
}

.tech-card:hover {
    border-color: var(--gold);
    transform: translateY(-5px);
}

.tech-card .icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(201, 162, 75, 0.15), rgba(201, 162, 75, 0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.tech-card h3 {
    font-size: 18px;
    color: var(--gold);
    margin-bottom: 12px;
}

.tech-card p {
    color: var(--gray);
    font-size: 14px;
}

/* ============================================================
   Contact Section
============================================================ */
.contact {
    padding: var(--section-pad) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 28px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 28px;
}

.contact-item .icon {
    width: 48px;
    height: 48px;
    background: rgba(201, 162, 75, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 15px;
    color: var(--gold);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--gray);
    font-size: 14px;
}

.contact-form {
    background: var(--dark-2);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid rgba(201, 162, 75, 0.1);
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    color: var(--gray-light);
    font-size: 14px;
    margin-bottom: 8px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--dark-3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--white);
    font-size: 15px;
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.1);
}

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

/* ============================================================
   Footer
============================================================ */
.footer {
    background: var(--dark);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(201, 162, 75, 0.15);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-brand .logo img {
    width: 40px;
    height: 40px;
}

.footer-brand .logo span {
    font-size: 20px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 2px;
}

.footer-brand p {
    color: var(--gray);
    font-size: 14px;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 15px;
    color: var(--gold);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: var(--gray);
    font-size: 14px;
}

.footer-col ul a:hover {
    color: var(--gold);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--gray);
    font-size: 13px;
}

.footer-bottom .links {
    margin-top: 12px;
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-bottom .links a {
    color: var(--gray);
    font-size: 13px;
}

.footer-bottom .links a:hover {
    color: var(--gold);
}

/* ============================================================
   Modal (联系弹窗)
============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--dark-2);
    border-radius: 16px;
    border: 1px solid rgba(201, 162, 75, 0.3);
    max-width: 520px;
    width: 100%;
    padding: 40px;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: var(--gray-light);
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gold);
    color: var(--dark);
    border-color: var(--gold);
}

.modal-title {
    text-align: center;
    margin-bottom: 8px;
}

.modal-title h3 {
    font-size: 22px;
    color: var(--white);
}

.modal-title p {
    color: var(--gray);
    font-size: 14px;
    margin-top: 8px;
}

.contact-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.contact-option {
    text-align: center;
    padding: 24px 16px;
    background: var(--dark-3);
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    cursor: pointer;
}

.contact-option:hover {
    border-color: var(--gold);
    transform: translateY(-3px);
}

.contact-option .qr {
    width: 140px;
    height: 140px;
    margin: 0 auto 16px;
    border-radius: 8px;
    overflow: hidden;
}

.contact-option .qr img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contact-option h4 {
    font-size: 16px;
    color: var(--gold);
    margin-bottom: 4px;
}

.contact-option p {
    font-size: 13px;
    color: var(--gray);
}

.contact-option .copy-btn {
    margin-top: 10px;
    padding: 6px 16px;
    font-size: 12px;
    background: rgba(201, 162, 75, 0.15);
    color: var(--gold);
    border: 1px solid rgba(201, 162, 75, 0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.contact-option .copy-btn:hover {
    background: var(--gold);
    color: var(--dark);
}

/* ============================================================
   Responsive
============================================================ */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 50px;
    }

    .timeline-dot {
        left: 20px;
    }

    .timeline-content,
    .timeline-img {
        width: 100%;
    }

    .timeline-img {
        margin-top: 16px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-pad: 60px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--dark);
        flex-direction: column;
        padding: 40px 24px;
        gap: 24px;
        transform: translateX(-100%);
        transition: transform 0.35s ease;
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: 30px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .contact-options {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   Utility & SEO Helpers
============================================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.breadcrumb {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--gray);
}

.breadcrumb a:hover {
    color: var(--gold);
}

.breadcrumb .sep {
    margin: 0 8px;
    color: var(--gold);
}

/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Lazy loading placeholder */
img[loading="lazy"] {
    background: var(--dark-3);
    min-height: 100px;
}