/* ============================================
   Perlart 手作理想国 — 组件样式
   ============================================ */

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
}

.nav--transparent {
  background: transparent;
}

.nav--solid {
  background: rgba(253, 248, 240, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__logo img {
  height: 44px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-ink);
}

.nav--transparent .nav__logo-text {
  color: #fff;
}

.nav--solid .nav__logo-text {
  color: var(--color-ink);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav--transparent .nav__link {
  color: rgba(255,255,255,0.85);
}

.nav--transparent .nav__link:hover,
.nav--transparent .nav__link.active {
  color: #fff;
}

.nav--solid .nav__link {
  color: var(--color-ink-light);
}

.nav--solid .nav__link:hover,
.nav--solid .nav__link.active {
  color: var(--color-gold);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  cursor: pointer;
  z-index: var(--z-modal);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-ink);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav--transparent .nav__toggle span {
  background: #fff;
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === Hero Section === */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(44, 44, 44, 0.15) 0%,
    rgba(44, 44, 44, 0.45) 50%,
    rgba(44, 44, 44, 0.65) 100%
  );
}

.hero__content {
  text-align: center;
  color: #fff;
  z-index: 1;
  padding: 0 var(--space-6);
}

.hero__label {
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  letter-spacing: 4px;
  text-transform: uppercase;
  opacity: 0.8;
  margin-bottom: var(--space-4);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-6xl);
  font-weight: var(--font-bold);
  color: #fff;
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero__subtitle {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-light);
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-6);
  letter-spacing: 6px;
}

.hero__desc {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: var(--leading-relaxed);
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.6);
  font-size: var(--text-xs);
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, rgba(255,255,255,0.6), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* === Page Hero (non-home) === */
.page-hero {
  position: relative;
  height: 50vh;
  min-height: 350px;
  max-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-ink);
}

.page-hero__bg {
  position: absolute;
  inset: 0;
}

.page-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
}

.page-hero__content {
  text-align: center;
  color: #fff;
  z-index: 1;
  padding: 0 var(--space-6);
}

.page-hero__label {
  font-family: var(--font-accent);
  font-size: var(--text-sm);
  letter-spacing: 4px;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: var(--space-3);
}

.page-hero__title {
  font-size: var(--text-5xl);
  color: #fff;
  margin-bottom: var(--space-3);
}

.page-hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  max-width: 500px;
  margin: 0 auto;
}

/* === Stats Section === */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  padding: var(--space-16) 0;
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-accent);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat__number span {
  font-size: var(--text-3xl);
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  letter-spacing: 1px;
}

/* === Card === */
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.card__image {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__image img {
  transform: scale(1.06);
}

.card__body {
  padding: var(--space-6);
}

.card__tag {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  line-height: var(--leading-relaxed);
}

/* === Service Card (with icon) === */
.service-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-gold);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-cream);
  border-radius: var(--radius-full);
  font-size: 32px;
  transition: all var(--transition-base);
}

.service-card:hover .service-card__icon {
  background: var(--color-gold);
  transform: scale(1.1) rotate(5deg);
}

.service-card:hover .service-card__icon svg {
  color: #fff;
}

.service-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  line-height: var(--leading-relaxed);
}

/* === Portfolio Grid === */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.portfolio-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 1;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
  transform: scale(1.08);
}

.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(44,44,44,0.8) 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-item__overlay {
  opacity: 1;
}

.portfolio-item__overlay h4 {
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

/* Portfolio Span Variants */
.portfolio-item--wide {
  grid-column: span 2;
}

.portfolio-item--tall {
  grid-row: span 2;
}

/* === Filter Tabs === */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-tab {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-warm-gray);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1.5px solid transparent;
}

.filter-tab:hover {
  color: var(--color-gold);
  border-color: var(--color-gold-light);
}

.filter-tab.active {
  color: #fff;
  background: var(--color-gold);
  border-color: var(--color-gold);
}

/* === Testimonial / Quote === */
.quote-block {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  position: relative;
  box-shadow: var(--shadow-md);
}

.quote-block::before {
  content: '"';
  font-family: var(--font-accent);
  font-size: 120px;
  color: var(--color-gold-light);
  opacity: 0.3;
  position: absolute;
  top: var(--space-4);
  left: var(--space-8);
  line-height: 1;
}

.quote-block__text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-loose);
  color: var(--color-ink);
  position: relative;
  z-index: 1;
}

/* === Partner Logos Marquee === */
.marquee {
  overflow: hidden;
  padding: var(--space-8) 0;
}

.marquee__track {
  display: flex;
  gap: var(--space-16);
  animation: marquee 30s linear infinite;
}

.marquee__item {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-warm-gray);
  opacity: 0.5;
  white-space: nowrap;
  letter-spacing: 2px;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* === Timeline === */
.timeline {
  position: relative;
  padding: var(--space-8) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-light-gray);
  transform: translateX(-50%);
}

.timeline__item {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
  position: relative;
}

.timeline__item:nth-child(odd) {
  flex-direction: row-reverse;
  text-align: right;
}

.timeline__dot {
  position: absolute;
  left: 50%;
  top: var(--space-2);
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-gold);
  border: 3px solid var(--color-cream);
  box-shadow: 0 0 0 3px var(--color-gold-light);
  z-index: 1;
}

.timeline__content {
  width: calc(50% - var(--space-12));
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.timeline__year {
  font-family: var(--font-accent);
  font-size: var(--text-2xl);
  color: var(--color-gold);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.timeline__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.timeline__desc {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
}

/* === Contact Form === */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-ink);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  background: #fff;
  border: 1.5px solid var(--color-light-gray);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201,169,110,0.1);
}

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

/* === Footer === */
.footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__logo img {
  height: 36px;
  filter: brightness(0) invert(1);
}

.footer__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: #fff;
  font-weight: var(--font-semibold);
}

.footer__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: rgba(255,255,255,0.5);
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: #fff;
  margin-bottom: var(--space-4);
  font-weight: var(--font-semibold);
}

.footer__list li {
  margin-bottom: var(--space-2);
}

.footer__list a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-base);
}

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

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
}

.footer__contact-icon {
  color: var(--color-gold);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}

/* === Lightbox === */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: background var(--transition-base);
}

.lightbox__close:hover {
  background: rgba(255,255,255,0.1);
}

/* === Back to Top === */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-gold);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-gold);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-sticky);
  cursor: pointer;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(201,169,110,0.4);
}