/* ===== 电竞赛事策划与执行公司 - 全站样式 ===== */
/* 主色调：曜石黑 #141414 | 香槟金 #D4AF37 | 纯白 #FFFFFF */

:root {
  --color-primary: #141414;
  --color-accent: #D4AF37;
  --color-white: #FFFFFF;
  --color-gray-dark: #1e1e1e;
  --color-gray-mid: #2a2a2a;
  --color-gray-light: #3a3a3a;
  --color-text: #e0e0e0;
  --color-text-muted: #999999;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-primary);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: #f0d060;
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header & Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(20, 20, 20, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  padding: 12px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 2px;
}

.site-logo span {
  color: var(--color-white);
}

.main-nav ul {
  display: flex;
  gap: 28px;
}

.main-nav a {
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}

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

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-accent);
}

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

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: 0;
}

.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-video-bg iframe,
.hero-video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(20,20,20,0.6) 0%, rgba(20,20,20,0.85) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-content h1 span {
  color: var(--color-accent);
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--color-text);
  max-width: 680px;
  margin: 0 auto 30px;
}

.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 4px;
  transition: var(--transition);
  border: 2px solid var(--color-accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--color-accent);
}

.btn-outline {
  display: inline-block;
  padding: 14px 36px;
  background: transparent;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 4px;
  border: 2px solid var(--color-accent);
  transition: var(--transition);
}

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

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

.section-dark {
  background: var(--color-gray-dark);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.section-title p {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 12px auto 0;
}

/* ===== Grid Layouts ===== */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

/* ===== Service Cards ===== */
.service-card {
  background: var(--color-gray-mid);
  border: 1px solid var(--color-gray-light);
  border-radius: 8px;
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(212, 175, 55, 0.1);
}

.service-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--color-accent);
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--color-white);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Advantage Section ===== */
.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  background: var(--color-gray-mid);
  border-radius: 8px;
  border-left: 4px solid var(--color-accent);
}

.advantage-item .num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  min-width: 50px;
}

.advantage-item h3 {
  font-size: 1.1rem;
  color: var(--color-white);
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== Case Study ===== */
.case-highlight {
  background: var(--color-gray-mid);
  border-radius: 12px;
  overflow: hidden;
}

.case-highlight-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.case-highlight-content {
  padding: 30px;
}

.case-highlight-content h3 {
  font-size: 1.4rem;
  color: var(--color-white);
  margin-bottom: 12px;
}

.case-highlight-content p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-tag {
  padding: 4px 12px;
  background: rgba(212, 175, 55, 0.15);
  color: var(--color-accent);
  border-radius: 20px;
  font-size: 0.8rem;
}

/* ===== Partners ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  align-items: center;
}

.partner-logo {
  background: var(--color-gray-mid);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  border: 1px solid var(--color-gray-light);
  transition: var(--transition);
}

.partner-logo:hover {
  border-color: var(--color-accent);
}

.partner-logo span {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===== Team Section ===== */
.team-card {
  background: var(--color-gray-mid);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-light);
  transition: var(--transition);
}

.team-card:hover {
  border-color: var(--color-accent);
}

.team-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  filter: grayscale(30%);
  transition: var(--transition);
}

.team-card:hover .team-card-img {
  filter: grayscale(0);
}

.team-card-info {
  padding: 20px;
  text-align: center;
}

.team-card-info h4 {
  color: var(--color-white);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.team-card-info p {
  color: var(--color-accent);
  font-size: 0.85rem;
}

/* ===== Form Section ===== */
.form-section {
  background: var(--color-gray-dark);
  border-radius: 12px;
  padding: 40px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.9rem;
  color: var(--color-text);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  background: var(--color-gray-mid);
  border: 1px solid var(--color-gray-light);
  border-radius: 6px;
  color: var(--color-white);
  font-size: 0.95rem;
  font-family: var(--font-main);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

/* ===== Footer ===== */
.site-footer {
  background: #0d0d0d;
  padding: 50px 0 20px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

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

.footer-brand h3 {
  color: var(--color-accent);
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-accent);
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

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

.footer-contact li {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-light);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

/* ===== Page Banner ===== */
.page-banner {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-gray-dark) 100%);
  text-align: center;
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}

.page-banner h1 {
  font-size: 2.4rem;
  color: var(--color-white);
  margin-bottom: 12px;
}

.page-banner p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* ===== Content Blocks ===== */
.content-block {
  padding: 40px 0;
}

.content-block h2 {
  font-size: 1.6rem;
  color: var(--color-white);
  margin-bottom: 16px;
}

.content-block h3 {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.content-block p {
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ===== Video Block ===== */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  margin: 30px 0;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== Stats ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px 0;
}

.stat-item {
  text-align: center;
  padding: 24px;
  background: var(--color-gray-mid);
  border-radius: 8px;
}

.stat-item .number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.stat-item .label {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-accent);
}

.timeline-item {
  position: relative;
  padding: 20px 0 20px 30px;
  border-bottom: 1px solid var(--color-gray-light);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -35px;
  top: 26px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
}

.timeline-item h4 {
  color: var(--color-white);
  margin-bottom: 6px;
}

.timeline-item p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ===== Lazy Loading Placeholder ===== */
.lazy-img {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.lazy-img.loaded {
  opacity: 1;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .partners-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--color-primary);
    padding: 80px 30px;
    transition: var(--transition);
    z-index: 999;
  }

  .main-nav.active {
    right: 0;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 20px;
  }

  .mobile-toggle {
    display: flex;
    z-index: 1001;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-banner {
    padding: 120px 0 40px;
  }

  .page-banner h1 {
    font-size: 1.8rem;
  }

  .section {
    padding: 50px 0;
  }

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

@media (max-width: 480px) {
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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