/* ==========================================================
   大地视频 - 全局样式
   主题：深色背景 + 金色/暖色强调（温暖追剧 · 光影）
   ========================================================== */

:root {
  --bg-dark: #0e0e14;
  --bg-deep: #14141c;
  --bg-card: #1a1a24;
  --bg-card-hover: #22222e;
  --gold: #f5b942;
  --gold-light: #ffd273;
  --gold-dark: #d99a2b;
  --warm: #ff8c5a;
  --text-main: #f4f1ea;
  --text-sub: #b9b4a8;
  --text-dim: #7d786e;
  --border: rgba(245, 185, 66, 0.18);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --max-width: 1200px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

ul {
  list-style: none;
}

.container {
  width: min(92%, var(--max-width));
  margin: 0 auto;
}

.section {
  padding: 90px 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.3;
  margin-bottom: 14px;
  background: linear-gradient(120deg, var(--gold-light), var(--warm));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.section-head p {
  color: var(--text-sub);
  font-size: 1.05rem;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #1c1404;
  box-shadow: 0 8px 22px rgba(245, 185, 66, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(245, 185, 66, 0.5);
  color: #1c1404;
}

.btn-ghost {
  background: transparent;
  color: var(--gold-light);
  border: 1.5px solid var(--gold);
}

.btn-ghost:hover {
  background: rgba(245, 185, 66, 0.12);
  transform: translateY(-3px);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(14, 14, 20, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--gold), var(--warm));
  color: #1c1404;
  font-weight: 800;
  box-shadow: 0 6px 16px rgba(245, 185, 66, 0.35);
}

.brand-text {
  background: linear-gradient(120deg, var(--gold-light), var(--warm));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.96rem;
  color: var(--text-sub);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold-light);
  background: rgba(245, 185, 66, 0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 主视觉 ---------- */
.hero {
  position: relative;
  padding: 130px 0 150px;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(245, 185, 66, 0.18), transparent 45%),
    radial-gradient(ellipse at 80% 70%, rgba(255, 140, 90, 0.14), transparent 45%),
    linear-gradient(180deg, #101018 0%, var(--bg-dark) 100%);
  text-align: center;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(245, 185, 66, 0.14) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.4;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(245, 185, 66, 0.08);
  color: var(--gold-light);
  font-size: 0.85rem;
  margin-bottom: 26px;
  animation: fadeInDown 0.8s ease both;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: 1.25;
  font-weight: 800;
  max-width: 860px;
  margin: 0 auto 22px;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero h1 .highlight {
  background: linear-gradient(120deg, var(--gold-light), var(--warm));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  max-width: 640px;
  margin: 0 auto 36px;
  color: var(--text-sub);
  font-size: 1.12rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 24px 16px;
}

.hero-stat strong {
  display: block;
  font-size: 2rem;
  color: var(--gold-light);
  margin-bottom: 4px;
}

.hero-stat span {
  color: var(--text-dim);
  font-size: 0.92rem;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

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

.card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card h3 a:hover {
  color: var(--gold-light);
}

.card p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

.card .card-meta {
  display: flex;
  gap: 14px;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: rgba(245, 185, 66, 0.12);
  color: var(--gold-light);
  margin-bottom: 12px;
}

/* ---------- 特性 ---------- */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

.feature-card {
  background: linear-gradient(160deg, var(--bg-card), var(--bg-deep));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 34px 28px;
  text-align: left;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

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

.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  background: rgba(245, 185, 66, 0.14);
  color: var(--gold-light);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

/* ---------- 服务介绍 ---------- */
.services-wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.service-item {
  display: flex;
  gap: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.3s ease;
}

.service-item:hover {
  transform: translateY(-4px);
}

.service-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--gold);
  opacity: 0.8;
  line-height: 1;
}

.service-item h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.service-item p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

/* ---------- 统计/口碑 ---------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.testimonial {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}

.testimonial blockquote {
  color: var(--text-sub);
  font-style: italic;
  margin-bottom: 16px;
}

.testimonial .author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial .author img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial .author strong {
  display: block;
  font-size: 0.95rem;
}

.testimonial .author span {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.stars {
  color: var(--gold);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

/* ---------- CTA ---------- */
.cta-section {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(245, 185, 66, 0.22), transparent 60%),
    var(--bg-deep);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cta-section h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto 32px;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.02rem;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.3s ease;
}

.faq-question:hover {
  background: rgba(245, 185, 66, 0.06);
}

.faq-question .arrow {
  color: var(--gold);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-sub);
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 22px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #0a0a10;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--gold-light);
  font-size: 1rem;
  margin-bottom: 18px;
}

.footer-col p {
  color: var(--text-sub);
  font-size: 0.92rem;
}

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

.footer-col a {
  color: var(--text-sub);
  font-size: 0.92rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 22px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 34px 0 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}

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

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

.breadcrumb .sep {
  margin: 0 10px;
  color: var(--text-dim);
}

/* ---------- 页面主标题 ---------- */
.page-hero {
  padding: 80px 0 60px;
  text-align: center;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(245, 185, 66, 0.14), transparent 50%),
    var(--bg-dark);
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ---------- 文章正文 ---------- */
.article-content {
  max-width: 860px;
  margin: 0 auto;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 40px 0 16px;
  color: var(--gold-light);
}

.article-content h3 {
  font-size: 1.25rem;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-sub);
  font-size: 1.02rem;
}

.article-content ul {
  margin: 0 0 18px 20px;
  list-style: disc;
  color: var(--text-sub);
}

.article-content li {
  margin-bottom: 8px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--text-dim);
  font-size: 0.88rem;
  margin: 18px 0 30px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

/* ---------- 时间线 ---------- */
.timeline {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), transparent);
}

.timeline-item {
  position: relative;
  padding: 0 0 34px 20px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(245, 185, 66, 0.18);
}

.timeline-item .year {
  color: var(--gold);
  font-weight: 700;
  font-size: 0.95rem;
}

.timeline-item h3 {
  margin: 6px 0 8px;
  font-size: 1.15rem;
}

.timeline-item p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

/* ---------- 表单 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 34px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.98rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(245, 185, 66, 0.15);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 10px;
}

.info-list {
  display: grid;
  gap: 18px;
}

.info-item {
  display: flex;
  gap: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 22px;
}

.info-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(245, 185, 66, 0.12);
  color: var(--gold-light);
  font-size: 1.2rem;
}

.info-item h3 {
  font-size: 1.02rem;
  margin-bottom: 6px;
}

.info-item p {
  color: var(--text-sub);
  font-size: 0.93rem;
}

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  min-width: 44px;
  height: 44px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-sub);
  font-size: 0.92rem;
  transition: all 0.3s ease;
}

.pagination a:hover {
  border-color: var(--gold);
  color: var(--gold-light);
}

.pagination .current {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #1c1404;
  border-color: transparent;
  font-weight: 700;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #1c1404;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  z-index: 900;
  box-shadow: 0 8px 22px rgba(245, 185, 66, 0.4);
}

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

/* ---------- 动画 ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- 辅助 ---------- */
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.text-center { text-align: center; }
.muted { color: var(--text-sub); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(14, 14, 20, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 12px 5%;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 14px 12px;
    border-radius: 10px;
  }

  .hero {
    padding: 90px 0 110px;
  }

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

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

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

  .feature-list {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
  }
}