:root {
  --bg: #f4efe6;
  --bg-paper: #fffdf8;
  --bg-deep: #efe7d8;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --muted: #8a857a;
  --accent: #ff4d00;
  --accent-dark: #cc3a00;
  --teal: #0a6c64;
  --line: #e0d6c4;
  --shadow: 0 8px 24px rgba(26, 26, 26, 0.06);
  --shadow-lg: 0 12px 40px rgba(26, 26, 26, 0.12);
  --font-title: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

body {
  font-family: var(--font-body);
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  letter-spacing: 0.01em;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image: radial-gradient(rgba(26, 26, 26, 0.04) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* 核心布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

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

.section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, calc(100% - 48px));
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line), transparent);
}

/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 2px solid var(--ink);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent) 0px,
    var(--accent) 12px,
    transparent 12px,
    transparent 24px
  );
  z-index: 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
  position: relative;
  z-index: 2;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
  box-shadow: 0 0 0 3px var(--bg-paper), 0 0 0 5px var(--accent);
  transform: rotate(-8deg);
  transition: transform 0.2s;
}

.logo:hover .logo-icon {
  transform: rotate(8deg) scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.03em;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

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

.main-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.main-nav .nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 0;
  font-weight: 800;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: background 0.2s, clip-path 0.2s;
}

.main-nav .nav-cta::after {
  display: none;
}

.main-nav .nav-cta:hover {
  background: var(--accent);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 100;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--ink);
  transition: 0.3s;
}

.menu-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.menu-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Hero */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(175deg, var(--bg-paper) 0%, var(--bg) 100%);
  padding: 140px 0 80px;
}

.hero::before {
  content: '内幕';
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-55%) rotate(12deg);
  font-size: clamp(300px, 35vw, 520px);
  font-weight: 900;
  color: var(--ink);
  opacity: 0.03;
  white-space: nowrap;
  line-height: 1;
  letter-spacing: -0.05em;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent) 0px,
    var(--accent) 18px,
    transparent 18px,
    transparent 36px
  );
  opacity: 0.7;
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 0;
  margin-bottom: 18px;
  background: var(--ink);
  color: #fff;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  position: relative;
}

.hero-eyebrow::before {
  content: '●';
  color: var(--accent);
  font-size: 0.7rem;
  margin-right: 6px;
  animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.05;
  margin-bottom: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.hero h1 .text-accent {
  position: relative;
  color: var(--accent);
  white-space: nowrap;
}

.hero h1 .text-accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 6px;
  background: var(--accent);
  opacity: 0.2;
  z-index: -1;
}

.hero h1 .block-outline {
  display: block;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
}

.hero p {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 540px;
  margin-bottom: 36px;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
  line-height: 1.7;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 0;
  font-weight: 800;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: 0.2s;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  box-shadow: 6px 6px 0 var(--ink);
  transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--ink);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--ink);
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--bg-paper);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--accent);
}

/* Hero配套视觉 */
.hero-image {
  border-radius: 0;
  overflow: hidden;
  box-shadow: 12px 12px 0 var(--teal);
  border: 2px solid var(--ink);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(30%) contrast(1.05);
  transition: filter 0.4s;
}

.hero-image:hover img {
  filter: grayscale(0) contrast(1);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  color: var(--accent);
  text-transform: uppercase;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 16px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-desc {
  max-width: 620px;
  color: var(--muted);
  margin-bottom: 48px;
  font-size: 1.02rem;
  line-height: 1.7;
}

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

.category-card {
  border-radius: 0;
  padding: 30px 28px;
  background: var(--bg-paper);
  border: 1px solid var(--line);
  transition: 0.25s ease;
  position: relative;
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.05);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.25s ease;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 8px 8px 0 rgba(26, 26, 26, 0.08);
  border-color: var(--ink);
}

.category-card:hover::before {
  transform: scaleY(1);
  transform-origin: top;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--bg-deep), var(--bg-paper));
  border: 1px solid var(--line);
}

.card-link {
  font-weight: 800;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  transition: color 0.2s;
}

.card-link:hover {
  color: var(--ink);
}

.card-link::after {
  content: '→';
  transition: transform 0.2s;
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: 0;
  overflow: hidden;
  position: relative;
  box-shadow: 8px 8px 0 rgba(26, 26, 26, 0.06);
  border: 1px solid var(--line);
}

.feature-image::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: var(--accent);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  opacity: 0.8;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.6) contrast(1.1);
  transition: filter 0.4s, transform 0.4s;
}

.feature-image:hover img {
  filter: saturate(1) contrast(1);
  transform: scale(1.02);
}

.feature-text {
  padding: 0;
}

.feature-text .section-title {
  margin-bottom: 16px;
}

.feature-text p {
  color: var(--muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  border-bottom: 1px dashed var(--line);
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: var(--accent);
  background: var(--bg-paper);
  border: 1px solid var(--accent);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 16px;
  border-radius: 0;
  background: var(--bg-paper);
  border: 1px solid var(--line);
  border-top: 4px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-item:hover {
  transform: translateY(-3px);
  box-shadow: 6px 6px 0 rgba(26, 26, 26, 0.08);
  border-top-color: var(--accent);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-number::after {
  content: '+';
  color: var(--accent);
  margin-left: 2px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 0;
  overflow: hidden;
  background: var(--bg-paper);
  border: 1px solid var(--line);
  transition: 0.25s ease;
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.03);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: 8px 8px 0 var(--accent);
  border-color: var(--ink);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
  filter: grayscale(50%) contrast(1.05);
  transition: filter 0.3s, transform 0.3s;
}

.content-wall-item:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.03);
}

.content-wall-body {
  padding: 22px;
}

.content-wall-body h3 {
  font-size: 1.08rem;
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.3;
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 0;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-paper);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item:hover {
  border-color: var(--ink);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.05);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 800;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.02rem;
  transition: background 0.2s;
  position: relative;
}

.faq-item .faq-question::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 26px;
  background: var(--accent);
  margin-right: 14px;
  flex-shrink: 0;
}

.faq-item .faq-question span:last-child {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent);
  transition: transform 0.3s;
  margin-left: auto;
  padding-left: 16px;
}

.faq-item.open .faq-question span:last-child {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-item .faq-answer {
  padding: 0 24px 20px 54px;
  display: none;
  color: var(--muted);
  line-height: 1.7;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideDown 0.25s ease;
}

@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* CTA横幅 */
.cta-banner {
  padding: 64px 24px;
  text-align: center;
  border-radius: 0;
  color: #fff;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--accent) 0%, #ff6b1a 50%, var(--accent-dark) 100%);
  box-shadow: 0 12px 40px rgba(255, 77, 0, 0.25);
  border: 2px solid var(--ink);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0px,
    transparent 12px,
    rgba(255, 255, 255, 0.08) 12px,
    rgba(255, 255, 255, 0.08) 24px
  );
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 480px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--accent);
  box-shadow: 6px 6px 0 var(--ink);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--bg-paper);
  box-shadow: 8px 8px 0 var(--ink);
}

/* 页脚 */
.site-footer {
  padding: 60px 0 32px;
  background: var(--bg-deep);
  border-top: 2px solid var(--ink);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--ink) 0px,
    var(--ink) 10px,
    transparent 10px,
    transparent 20px,
    var(--accent) 20px,
    var(--accent) 30px,
    transparent 30px,
    transparent 40px
  );
  opacity: 0.6;
}

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

.footer-brand {
  padding-right: 30px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
  opacity: 0.8;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 8px;
  display: inline-block;
}

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

.footer-col ul a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  display: block;
  padding: 4px 0;
  transition: color 0.2s, transform 0.2s;
}

.footer-col ul a:hover {
  color: var(--accent);
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-bottom a {
  color: var(--accent);
  text-decoration: none;
}

/* 工具类 */
.text-accent {
  color: var(--accent);
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--muted);
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--bg-paper);
    padding: 24px;
    gap: 16px;
    border-bottom: 2px solid var(--ink);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    align-items: flex-start;
    z-index: 999;
  }

  .main-nav.open a {
    font-size: 1.1rem;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px dashed var(--line);
  }

  .main-nav.open .nav-cta {
    width: auto;
    margin-top: 8px;
  }

  .hero {
    min-height: auto;
    padding: 160px 0 80px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero h1 .block-outline {
    -webkit-text-stroke: 1.5px var(--ink);
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-buttons .btn {
    text-align: center;
    justify-content: center;
  }

  .hero {
    padding: 140px 0 60px;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .hero h1 .text-accent::after {
    height: 4px;
  }

  .hero p {
    font-size: 1rem;
    padding-left: 14px;
  }

  .section-label {
    font-size: 0.7rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .btn,
  .btn-primary,
  .btn-outline {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .cta-banner {
    padding: 44px 20px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

  .faq-item .faq-question {
    font-size: 0.95rem;
    padding: 14px 16px;
  }

  .faq-item .faq-answer {
    padding: 0 16px 16px 40px;
  }
}