/* ===== 火网交易所 - 全局样式 ===== */
:root {
  --bg-deep: #0c0f1a;
  --bg-card: #13172a;
  --bg-surface: #1a1f35;
  --orange: #f97316;
  --orange-light: #fb923c;
  --orange-dark: #ea580c;
  --purple: #8b5cf6;
  --purple-light: #a78bfa;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --green: #10b981;
  --white: #ffffff;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-orange: 0 4px 20px rgba(249,115,22,0.25);
  --shadow-purple: 0 4px 20px rgba(139,92,246,0.25);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 网格背景动画 ===== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background-image: 
    linear-gradient(rgba(139,92,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,92,246,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ===== 导航栏 ===== */
header {
  position: fixed; top: 0; left: 0; width: 100%;
  z-index: 1000;
  background: rgba(12,15,26,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139,92,246,0.15);
  transition: var(--transition);
}

header nav {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
}

.nav-brand {
  font-size: 1.5rem; font-weight: 700;
  background: linear-gradient(135deg, var(--orange), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; text-decoration: none;
}

.nav-links { display: flex; gap: 32px; list-style: none; }

.nav-links a {
  color: var(--gray-300); text-decoration: none; font-size: 0.95rem;
  font-weight: 500; transition: var(--transition); position: relative;
}

.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--purple));
  transition: width 0.3s;
}

.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white); padding: 8px 20px; border-radius: 25px;
  text-decoration: none; font-weight: 600; font-size: 0.9rem;
  transition: var(--transition); box-shadow: var(--shadow-orange);
}

.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(249,115,22,0.4); }

/* 汉堡菜单 */
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--white); margin: 5px 0; transition: var(--transition); }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(249,115,22,0.4); }
  50% { box-shadow: 0 0 0 15px rgba(249,115,22,0); }
}

@keyframes pulse-purple {
  0%, 100% { box-shadow: 0 0 0 0 rgba(139,92,246,0.4); }
  50% { box-shadow: 0 0 0 15px rgba(139,92,246,0); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes glow {
  0%, 100% { text-shadow: 0 0 10px rgba(139,92,246,0.3), 0 0 20px rgba(249,115,22,0.2); }
  50% { text-shadow: 0 0 20px rgba(139,92,246,0.5), 0 0 40px rgba(249,115,22,0.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-fadeInUp { animation: fadeInUp 0.8s ease forwards; }
.animate-fadeInLeft { animation: fadeInLeft 0.8s ease forwards; }
.animate-fadeInRight { animation: fadeInRight 0.8s ease forwards; }

.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

.btn-pulse { animation: pulse 2s infinite; }
.btn-pulse-purple { animation: pulse-purple 2s infinite; }

/* ===== Section通用 ===== */
section { position: relative; z-index: 1; padding: 80px 24px; }

.container { max-width: 1280px; margin: 0 auto; }

.section-title {
  text-align: center; margin-bottom: 56px;
}

.section-title h2 {
  font-size: 2.25rem; font-weight: 700;
  background: linear-gradient(135deg, var(--orange), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 12px;
}

.section-title p {
  color: var(--gray-400); font-size: 1.05rem; max-width: 600px; margin: 0 auto;
}

/* ===== Hero ===== */
#hero {
  min-height: 100vh; display: flex; align-items: center;
  padding-top: 100px; padding-bottom: 100px;
  background: radial-gradient(ellipse at 50% 0%, rgba(139,92,246,0.12) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 100%, rgba(249,115,22,0.08) 0%, transparent 50%);
}

.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center; max-width: 1280px; margin: 0 auto;
}

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

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--orange), var(--purple-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  color: var(--gray-300); font-size: 1.1rem; margin-bottom: 32px; line-height: 1.7;
}

.hero-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }

.hero-badge {
  background: rgba(139,92,246,0.1); border: 1px solid rgba(139,92,246,0.25);
  color: var(--purple-light); padding: 6px 16px; border-radius: 20px;
  font-size: 0.85rem; font-weight: 500;
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white); padding: 14px 32px; border-radius: 30px;
  text-decoration: none; font-weight: 700; font-size: 1rem;
  transition: var(--transition); box-shadow: var(--shadow-orange);
  border: none; cursor: pointer;
}

.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(249,115,22,0.5); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--white);
  padding: 14px 32px; border-radius: 30px;
  text-decoration: none; font-weight: 600; font-size: 1rem;
  border: 2px solid rgba(139,92,246,0.4);
  transition: var(--transition);
}

.btn-secondary:hover { border-color: var(--purple); background: rgba(139,92,246,0.1); transform: translateY(-3px); }

.hero-image { display: flex; justify-content: center; align-items: center; }

.hero-image img { max-width: 100%; border-radius: var(--radius-lg); box-shadow: 0 20px 60px rgba(139,92,246,0.2); }

/* ===== 统计条 ===== */
#stats {
  background: var(--bg-card); border-top: 1px solid rgba(139,92,246,0.15);
  border-bottom: 1px solid rgba(139,92,246,0.15); padding: 40px 24px;
}

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; max-width: 1280px; margin: 0 auto; text-align: center;
}

.stat-item .stat-number {
  font-size: 2.5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--orange), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label { color: var(--gray-400); font-size: 0.9rem; margin-top: 4px; }

/* ===== 特性卡片 ===== */
#features {
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-card) 100%);
}

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1280px; margin: 0 auto;
}

.feature-card {
  background: var(--bg-surface); border: 1px solid rgba(139,92,246,0.1);
  border-radius: var(--radius-lg); padding: 32px;
  transition: var(--transition); cursor: default;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(249,115,22,0.3);
  box-shadow: 0 12px 30px rgba(249,115,22,0.1);
}

.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 20px;
}

.feature-icon.orange { background: rgba(249,115,22,0.15); color: var(--orange-light); }
.feature-icon.purple { background: rgba(139,92,246,0.15); color: var(--purple-light); }
.feature-icon.blue { background: rgba(37,99,235,0.15); color: var(--blue-light); }
.feature-icon.green { background: rgba(16,185,129,0.15); color: var(--green); }

.feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--white); }
.feature-card p { color: var(--gray-400); font-size: 0.95rem; line-height: 1.6; }

/* ===== CTA ===== */
#cta {
  text-align: center;
  background: radial-gradient(ellipse at center, rgba(249,115,22,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 30% 50%, rgba(139,92,246,0.06) 0%, transparent 50%);
}

.cta-content { max-width: 700px; margin: 0 auto; }

.cta-content h2 {
  font-size: 2.25rem; font-weight: 700; margin-bottom: 16px;
}

.cta-content p { color: var(--gray-300); margin-bottom: 32px; font-size: 1.05rem; }

.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 页面英雄 ===== */
.page-hero {
  padding-top: 140px; padding-bottom: 80px; text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(139,92,246,0.1) 0%, transparent 60%),
              radial-gradient(ellipse at 50% 100%, rgba(249,115,22,0.06) 0%, transparent 50%);
}

.page-hero h1 {
  font-size: 2.5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--orange), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 16px;
}

.page-hero p { color: var(--gray-300); font-size: 1.1rem; max-width: 650px; margin: 0 auto; }

/* ===== 关于页 ===== */
.timeline { max-width: 800px; margin: 0 auto; position: relative; padding-left: 32px; }

.timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(180deg, var(--orange), var(--purple));
}

.timeline-item { position: relative; margin-bottom: 40px; }

.timeline-item::before {
  content: ''; position: absolute; left: -36px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--orange); border: 2px solid var(--bg-deep);
}

.timeline-item .year {
  color: var(--orange); font-weight: 700; font-size: 0.95rem; margin-bottom: 4px;
}

.timeline-item h3 { color: var(--white); font-size: 1.1rem; margin-bottom: 6px; }
.timeline-item p { color: var(--gray-400); font-size: 0.95rem; }

.security-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; max-width: 1280px; margin: 0 auto;
}

.security-card {
  background: var(--bg-surface); border: 1px solid rgba(16,185,129,0.15);
  border-radius: var(--radius-md); padding: 28px; text-align: center;
  transition: var(--transition);
}

.security-card:hover { border-color: var(--green); box-shadow: 0 8px 25px rgba(16,185,129,0.1); transform: translateY(-4px); }

.security-card .sec-icon { font-size: 2rem; margin-bottom: 12px; color: var(--green); }
.security-card h3 { color: var(--white); margin-bottom: 8px; }
.security-card p { color: var(--gray-400); font-size: 0.9rem; }

.team-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; max-width: 1280px; margin: 0 auto;
}

.team-card {
  background: var(--bg-surface); border: 1px solid rgba(139,92,246,0.1);
  border-radius: var(--radius-lg); overflow: hidden; text-align: center;
  transition: var(--transition);
}

.team-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(139,92,246,0.15); }
.team-card img { width: 100%; height: 200px; object-fit: cover; }
.team-card .team-info { padding: 20px; }
.team-card .team-info h3 { color: var(--white); font-size: 1.1rem; }
.team-card .team-info span { color: var(--orange); font-size: 0.85rem; }

/* ===== 服务页 ===== */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1280px; margin: 0 auto;
}

.service-card {
  background: var(--bg-surface); border: 1px solid rgba(139,92,246,0.1);
  border-radius: var(--radius-lg); padding: 36px 28px;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(249,115,22,0.25);
  box-shadow: 0 12px 30px rgba(249,115,22,0.1);
}

.service-card h3 { font-size: 1.25rem; color: var(--white); margin-bottom: 12px; }
.service-card p { color: var(--gray-400); font-size: 0.95rem; line-height: 1.6; margin-bottom: 16px; }

.service-tag {
  display: inline-block; padding: 4px 12px; border-radius: 12px;
  font-size: 0.8rem; font-weight: 600; margin-right: 6px; margin-bottom: 6px;
}

.service-tag.spot { background: rgba(249,115,22,0.15); color: var(--orange-light); }
.service-tag.contract { background: rgba(139,92,246,0.15); color: var(--purple-light); }
.service-tag.blue { background: rgba(37,99,235,0.15); color: var(--blue-light); }
.service-tag.green { background: rgba(16,185,129,0.15); color: var(--green); }

.service-compare {
  max-width: 1280px; margin: 60px auto 0; overflow-x: auto;
}

.service-compare table {
  width: 100%; border-collapse: collapse; min-width: 700px;
}

.service-compare th {
  background: var(--bg-surface); color: var(--orange); padding: 14px 16px;
  text-align: left; font-weight: 600; border-bottom: 2px solid rgba(249,115,22,0.3);
}

.service-compare td {
  padding: 12px 16px; border-bottom: 1px solid rgba(139,92,246,0.1);
  color: var(--gray-300);
}

.service-compare tr:hover td { background: rgba(139,92,246,0.05); }

/* ===== FAQ页 ===== */
.faq-container { max-width: 900px; margin: 0 auto; }

.faq-search {
  width: 100%; padding: 14px 20px; border-radius: 30px;
  border: 1px solid rgba(139,92,246,0.25);
  background: var(--bg-surface); color: var(--white);
  font-size: 1rem; margin-bottom: 40px;
  transition: var(--transition); outline: none;
}

.faq-search:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(249,115,22,0.1); }

.faq-category { margin-bottom: 40px; }

.faq-category h2 {
  color: var(--orange); font-size: 1.3rem; margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid rgba(139,92,246,0.15);
}

.faq-category details {
  background: var(--bg-surface); border: 1px solid rgba(139,92,246,0.1);
  border-radius: var(--radius-md); margin-bottom: 12px;
  transition: var(--transition);
}

.faq-category details:hover { border-color: rgba(249,115,22,0.2); }

.faq-category summary {
  padding: 18px 24px; cursor: pointer; font-weight: 600;
  color: var(--white); font-size: 1rem; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}

.faq-category summary::-webkit-details-marker { display: none; }

.faq-category summary::after {
  content: '+'; font-size: 1.5rem; color: var(--orange);
  transition: transform 0.3s; font-weight: 300;
}

.faq-category details[open] summary::after {
  content: '−'; transform: rotate(0deg);
}

.faq-category details .faq-answer {
  padding: 0 24px 20px 24px; color: var(--gray-300); line-height: 1.7;
}

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; max-width: 1280px; margin: 0 auto; }

.contact-form { background: var(--bg-surface); border-radius: var(--radius-lg); padding: 40px; }

.contact-form label {
  display: block; margin-bottom: 6px; color: var(--gray-300);
  font-weight: 500; font-size: 0.9rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%; padding: 12px 16px; margin-bottom: 20px;
  border: 1px solid rgba(139,92,246,0.2); border-radius: var(--radius-sm);
  background: var(--bg-card); color: var(--white); font-size: 0.95rem;
  transition: var(--transition); outline: none; font-family: inherit;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--orange); box-shadow: 0 0 0 3px rgba(249,115,22,0.1);
}

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

.contact-form select option { background: var(--bg-surface); color: var(--white); }

.contact-form .btn-submit {
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white); border: none; padding: 14px 32px;
  border-radius: 30px; font-weight: 700; font-size: 1rem; cursor: pointer;
  transition: var(--transition); box-shadow: var(--shadow-orange);
  width: 100%;
}

.contact-form .btn-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(249,115,22,0.5); }

.contact-info-side { display: flex; flex-direction: column; gap: 24px; }

.contact-info-card {
  background: var(--bg-surface); border: 1px solid rgba(139,92,246,0.1);
  border-radius: var(--radius-md); padding: 24px; transition: var(--transition);
}

.contact-info-card:hover { border-color: rgba(249,115,22,0.2); }

.contact-info-card h3 { color: var(--orange); margin-bottom: 10px; font-size: 1.05rem; }
.contact-info-card p { color: var(--gray-400); font-size: 0.9rem; line-height: 1.6; }

.social-links { display: flex; gap: 12px; margin-top: 12px; }

.social-link {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(139,92,246,0.1); border: 1px solid rgba(139,92,246,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--purple-light); text-decoration: none;
  transition: var(--transition); font-size: 0.85rem; font-weight: 600;
}

.social-link:hover { background: rgba(139,92,246,0.2); transform: translateY(-3px); }

/* ===== 页脚 ===== */
footer {
  background: var(--bg-card); border-top: 1px solid rgba(139,92,246,0.15);
  padding: 48px 24px 24px; text-align: center;
}

.footer-links { display: flex; justify-content: center; gap: 32px; margin-bottom: 24px; flex-wrap: wrap; }

.footer-links a { color: var(--gray-400); text-decoration: none; transition: var(--transition); }
.footer-links a:hover { color: var(--orange); }

footer .copyright { color: var(--gray-500); font-size: 0.85rem; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-badges { justify-content: center; }
  .hero-buttons { justify-content: center; }
  .hero-image { order: -1; }
  .hero-content h1 { font-size: 2.25rem; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; width: 100%;
    background: rgba(12,15,26,0.98); flex-direction: column; padding: 20px; gap: 16px;
    border-bottom: 1px solid rgba(139,92,246,0.15); }
  .nav-links.active { display: flex; }
  .menu-toggle { display: block; }
  .nav-cta { display: none; }
  .hero-content h1 { font-size: 1.8rem; }
  section { padding: 60px 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .section-title h2 { font-size: 1.75rem; }
  .page-hero h1 { font-size: 1.8rem; }
}