/* ============================================================
   全局主样式文件 (Main Styles)
   麻豆tv创意广告与商业短片制作公司官方网站模板
   说明：包含全局布局、导航、页脚、通用模块样式
   ============================================================ */

/* === 基础样式 === */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text);
  background-color: var(--bg);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* === 导航栏 === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-nav);
  padding: var(--space-sm) 0;
  transition: background-color var(--transition-base), backdrop-filter var(--transition-base);
}

.header--scrolled {
  background-color: rgba(45, 45, 45, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.header__logo span {
  color: var(--primary);
}

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

.header__nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

.header__nav-link:hover {
  color: #fff;
}

.header__nav-link:hover::after {
  width: 100%;
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.5rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.header__cta:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

/* 汉堡菜单按钮 */
.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

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

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45, 45, 45, 0.8) 0%, rgba(26, 26, 26, 0.6) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: var(--space-lg) var(--space-md);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--fs-hero);
  color: #fff;
  line-height: 1.1;
  margin-block-end: var(--space-sm);
}

.hero__title span {
  color: var(--primary);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw + 0.5rem, 1.4rem);
  color: rgba(255, 255, 255, 0.8);
  margin-block-end: var(--space-md);
  line-height: 1.6;
}

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

/* === 按钮系统 === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn--outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn--dark {
  background: var(--secondary);
  color: #fff;
}

.btn--dark:hover {
  background: var(--text);
  transform: translateY(-3px);
}

/* === 模块标题 === */
.section {
  padding-block: var(--space-xl);
}

.section__header {
  text-align: center;
  margin-block-end: var(--space-lg);
}

.section__tag {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-block-end: var(--space-xs);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  color: var(--text);
  margin-block-end: var(--space-sm);
}

.section__desc {
  font-size: var(--fs-body);
  color: var(--text-light);
  max-width: 700px;
  margin-inline: auto;
}

/* === 品牌Logo滚动墙 === */
.logo-marquee {
  padding-block: var(--space-lg);
  background: var(--card-bg);
  overflow: hidden;
}

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

.logo-marquee__item {
  flex-shrink: 0;
  width: 120px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(1) opacity(0.5);
  transition: filter var(--transition-base);
}

.logo-marquee__item:hover {
  filter: grayscale(0) opacity(1);
}

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

/* === 案例卡片网格 === */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-md);
}

.portfolio-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.portfolio-card__image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-card__image {
  transform: scale(1.05);
}

.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio-card:hover .portfolio-card__overlay {
  opacity: 1;
}

.portfolio-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: #fff;
  margin-block-end: 0.25rem;
}

.portfolio-card__meta {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
}

/* === 服务卡片 === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.service-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.service-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-block-end: var(--space-sm);
  font-size: 1.5rem;
  color: #fff;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-block-end: var(--space-xs);
}

.service-card__desc {
  font-size: var(--fs-small);
  color: var(--text-light);
  line-height: 1.7;
}

/* === 数据统计 === */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  padding-block: var(--space-lg);
}

.stats__item {
  text-align: center;
}

.stats__number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.stats__label {
  font-size: var(--fs-small);
  color: var(--text-light);
  margin-block-start: var(--space-xs);
}

/* === 客户评价 === */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.testimonial-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.testimonial-card__quote {
  font-size: var(--fs-body);
  color: var(--text);
  line-height: 1.8;
  margin-block-end: var(--space-sm);
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.testimonial-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-card__name {
  font-weight: 600;
  font-size: 0.95rem;
}

.testimonial-card__role {
  font-size: var(--fs-small);
  color: var(--text-light);
}

/* === CTA区域 === */
.cta-section {
  background: linear-gradient(135deg, var(--secondary) 0%, #1a1a1a 100%);
  padding-block: var(--space-xl);
  text-align: center;
}

.cta-section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  color: #fff;
  margin-block-end: var(--space-sm);
}

.cta-section__desc {
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-inline: auto;
  margin-block-end: var(--space-md);
}

/* === 页脚 === */
.footer {
  background: var(--secondary);
  color: rgba(255, 255, 255, 0.7);
  padding-block: var(--space-xl) var(--space-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-lg);
  margin-block-end: var(--space-lg);
}

.footer__brand-desc {
  font-size: var(--fs-small);
  line-height: 1.8;
  margin-block-start: var(--space-sm);
}

.footer__title {
  font-weight: 600;
  color: #fff;
  margin-block-end: var(--space-sm);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer__link {
  font-size: var(--fs-small);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--primary);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block-start: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: var(--fs-small);
}

/* === 面包屑导航 === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: var(--space-sm);
  font-size: var(--fs-small);
  color: var(--text-light);
}

.breadcrumb__separator {
  color: var(--border-color);
}

.breadcrumb__current {
  color: var(--text);
  font-weight: 500;
}

/* === 页面头部Banner === */
.page-hero {
  background: var(--secondary);
  padding-block: calc(80px + var(--space-xl)) var(--space-lg);
  text-align: center;
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h1);
  color: #fff;
  margin-block-end: var(--space-xs);
}

.page-hero__desc {
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-inline: auto;
}

/* === 滚动动画 === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* === 响应式 === */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .header__menu-btn {
    display: flex;
  }

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

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

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
}

/* === 移动端全屏导航 === */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.98);
  z-index: calc(var(--z-nav) + 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-nav--open {
  transform: translateX(0);
}

.mobile-nav__link {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: #fff;
  transition: color var(--transition-fast);
}

.mobile-nav__link:hover {
  color: var(--primary);
}

.mobile-nav__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  color: #fff;
  font-size: 1.5rem;
}