/* ========================================
   电竞下注策略研究站 - 主样式表
   配色: 墨绿 #1B5E20 / 纯白 #FAFAFA / 金币黄 #FFC107
   字体: 思源黑体(标题) + 霞鹜文楷(正文)
   ======================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=LXGW+WenKai:wght@300;400;700&display=swap');

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

:root {
  --color-primary: #1B5E20;
  --color-primary-dark: #0D3B13;
  --color-primary-light: #2E7D32;
  --color-bg: #FAFAFA;
  --color-bg-alt: #F0F4F0;
  --color-accent: #FFC107;
  --color-accent-dark: #FFA000;
  --color-text: #212121;
  --color-text-light: #616161;
  --color-text-muted: #9E9E9E;
  --color-border: #E0E0E0;
  --color-white: #FFFFFF;
  --color-dark: #1A1A2E;
  --font-heading: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'LXGW WenKai', 'KaiTi', serif;
  --max-width: 1200px;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* Jammer Block - Hidden visually but accessible to crawlers */
.jammer-block {
  font-size: 1px;
  line-height: 1px;
  color: transparent;
  overflow: hidden;
  height: 1px;
  width: 1px;
  position: absolute;
  left: -9999px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-primary);
  margin-bottom: 0.8em;
}

h1 { font-size: 2.2rem; font-weight: 900; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1.2em;
  text-align: justify;
}

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

a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== HEADER / NAV ========== */
.site-header {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: 0;
  /* NOT sticky per requirement */
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 15px 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-white);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.3rem;
}

.site-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-primary-dark);
  font-weight: 900;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 5px;
}

.nav-menu a {
  color: var(--color-white);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  text-decoration: none;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    flex-direction: column;
    padding: 10px 20px 20px;
    z-index: 1000;
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-menu a {
    padding: 12px 14px;
    display: block;
  }
  .nav-wrapper {
    position: relative;
  }
}

/* ========== HERO SECTION ========== */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('../images/esports-arena-hero.webp') center/cover no-repeat;
  opacity: 0.15;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

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

.hero-content p {
  font-size: 1.1rem;
  max-width: 800px;
  opacity: 0.95;
}

/* ========== SECTION STYLES ========== */
.section {
  padding: 50px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--color-bg-alt);
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

.section-title h2 {
  display: inline-block;
  position: relative;
  padding-bottom: 15px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

/* ========== METHODOLOGY CARDS ========== */
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 30px;
}

@media (max-width: 768px) {
  .method-grid {
    grid-template-columns: 1fr;
  }
}

.method-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid var(--color-accent);
  text-align: center;
}

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

.method-card .icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 2rem;
  color: var(--color-accent);
}

.method-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.method-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  text-align: center;
}

.method-card .card-link {
  display: inline-block;
  margin-top: 15px;
  color: var(--color-accent-dark);
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 0.9rem;
}

/* ========== CALCULATOR ========== */
.calculator-wrapper {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  max-width: 900px;
  margin: 0 auto;
}

.calc-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 15px;
  margin-bottom: 15px;
  align-items: end;
}

@media (max-width: 768px) {
  .calc-row {
    grid-template-columns: 1fr 1fr;
  }
}

.calc-row label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  display: block;
  margin-bottom: 5px;
}

.calc-row input {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.calc-row input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}

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

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

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

.calc-results {
  margin-top: 20px;
  padding: 20px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
}

.calc-results h4 {
  margin-bottom: 10px;
  color: var(--color-primary);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.result-item {
  background: var(--color-white);
  padding: 15px;
  border-radius: var(--radius);
  text-align: center;
}

.result-item .label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.result-item .value {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-top: 5px;
}

.result-item .value.positive {
  color: #2E7D32;
}

.result-item .value.negative {
  color: #C62828;
}

/* ========== ARTICLE CARDS ========== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.article-card {
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.article-card .card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-card .card-body {
  padding: 20px;
}

.article-card .card-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 20px;
  font-size: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 500;
  margin-bottom: 10px;
}

.article-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.5;
}

.article-card h3 a {
  color: var(--color-primary);
}

.article-card h3 a:hover {
  color: var(--color-accent-dark);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.article-card .read-more {
  display: inline-block;
  margin-top: 10px;
  color: var(--color-accent-dark);
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 0.85rem;
}

/* ========== RISK PRINCIPLES ========== */
.risk-principles {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--radius);
  padding: 40px;
  color: var(--color-white);
}

.risk-list {
  list-style: none;
  counter-reset: risk-counter;
}

.risk-list li {
  counter-increment: risk-counter;
  padding: 15px 0 15px 60px;
  position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  font-size: 1.05rem;
}

.risk-list li:last-child {
  border-bottom: none;
}

.risk-list li::before {
  content: counter(risk-counter);
  position: absolute;
  left: 0;
  top: 15px;
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.1rem;
}

/* ========== DATASET SECTION ========== */
.dataset-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-accent);
  margin-bottom: 20px;
}

.dataset-card h3 {
  margin-bottom: 8px;
}

.dataset-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin: 10px 0;
}

.dataset-meta span {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 5px;
}

.dataset-meta span strong {
  color: var(--color-primary);
}

/* ========== FAQ SECTION ========== */
.faq-item {
  background: var(--color-white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 18px 50px 18px 20px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
  position: relative;
  transition: var(--transition);
}

.faq-question::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--color-accent);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-question:hover {
  background: var(--color-bg-alt);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 20px 18px;
  max-height: 500px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  padding: 15px 0;
  font-family: var(--font-heading);
  font-size: 0.85rem;
}

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

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

.breadcrumb span {
  color: var(--color-text-muted);
  margin: 0 8px;
}

.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 500;
}

/* ========== ARTICLE PAGE ========== */
.article-header {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-white);
  padding: 40px 0;
}

.article-header h1 {
  color: var(--color-white);
  font-size: 2rem;
  margin-bottom: 10px;
}

.article-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  opacity: 0.85;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5 {
  margin-top: 2em;
}

.article-content blockquote {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  padding: 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
}

.article-content .tip-box {
  background: #E8F5E9;
  border: 1px solid #A5D6A7;
  border-radius: var(--radius);
  padding: 20px;
  margin: 20px 0;
}

.article-content .tip-box .tip-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.article-content .warning-box {
  background: #FFF3E0;
  border: 1px solid #FFB74D;
  border-radius: var(--radius);
  padding: 20px;
  margin: 20px 0;
}

.article-content .warning-box .warning-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: #E65100;
  margin-bottom: 8px;
}

.article-content .step-block {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 25px;
  margin: 20px 0;
  position: relative;
  padding-left: 70px;
}

.article-content .step-block .step-number {
  position: absolute;
  left: 15px;
  top: 20px;
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.2rem;
}

.article-content .step-block h4 {
  margin-top: 0;
  color: var(--color-primary);
}

.article-content .code-block {
  background: var(--color-dark);
  color: #E0E0E0;
  padding: 20px;
  border-radius: var(--radius);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  overflow-x: auto;
  margin: 20px 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.article-content table th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 15px;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
}

.article-content table td {
  padding: 10px 15px;
  border-bottom: 1px solid var(--color-border);
}

.article-content table tr:nth-child(even) {
  background: var(--color-bg-alt);
}

.article-content .formula {
  background: var(--color-bg-alt);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  font-size: 1.2rem;
  font-family: 'Courier New', monospace;
  margin: 20px 0;
  color: var(--color-primary-dark);
}

/* ========== FOOTER ========== */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: 15px;
  font-family: var(--font-heading);
}

.footer-col p {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.6;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 15px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px;
  margin-top: 40px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  opacity: 0.6;
  text-align: center;
}

.age-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--color-accent);
  margin-bottom: 10px;
}

/* ========== ANIMATIONS ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== DATA TABLE ========== */
.data-table-wrapper {
  overflow-x: auto;
  margin: 20px 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 15px;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
  white-space: nowrap;
}

.data-table td {
  padding: 10px 15px;
  border-bottom: 1px solid var(--color-border);
}

.data-table tr:nth-child(even) {
  background: var(--color-bg-alt);
}

.data-table tr:hover {
  background: #E8F5E9;
}

/* ========== APP DOWNLOAD ========== */
.app-section {
  text-align: center;
  padding: 60px 20px;
}

.app-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 25px;
}

.app-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}

.app-btn:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  text-decoration: none;
  color: var(--color-white);
}

/* ========== INTERNAL LINKS SIDEBAR ========== */
.sidebar-links {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-top: 20px;
}

.sidebar-links h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-links ul {
  list-style: none;
}

.sidebar-links ul li {
  margin-bottom: 8px;
}

.sidebar-links ul li a {
  color: var(--color-text);
  font-size: 0.9rem;
  display: block;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.sidebar-links ul li a:hover {
  color: var(--color-accent-dark);
  padding-left: 8px;
}

/* ========== ARTICLE LAYOUT WITH SIDEBAR ========== */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px;
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

/* ========== PRIVACY PAGE ========== */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

.legal-content h2 {
  margin-top: 2em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-border);
}

/* ========== UTILITY ========== */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

/* Print styles */
@media print {
  .site-header, .site-footer, .menu-toggle { display: none; }
  body { font-size: 12pt; }
}