:root {
  --paper: #FBF7F0;
  --paper-deep: #F5F0E8;
  --ink: #1B1E28;
  --coral: #FF5A45;
  --amber: #FFB627;
  --mint: #00C9A7;
  --sky: #5C9CE6;
  --lav: #B799FF;
  --line: 2px solid var(--ink);
  --shadow: 6px 6px 0 rgba(27,30,40,0.12);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(27,30,40,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,30,40,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  line-height: 1.7;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.15;
  color: var(--ink);
}

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

a {
  color: inherit;
}

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

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--paper);
  border-left: var(--line);
}

::-webkit-scrollbar-thumb {
  background: var(--coral);
  border-radius: 0;
}

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

.section {
  padding: 80px 0;
  position: relative;
}

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

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251, 247, 240, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--coral);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-8deg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: 5px;
  right: 5px;
  width: 8px;
  height: 8px;
  background: var(--amber);
  border: 1.5px solid var(--ink);
  border-radius: 50%;
}

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

.main-nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  padding: 4px 0;
  transition: color 0.2s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

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

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

.nav-cta {
  padding: 8px 22px;
  border-radius: 50px;
  background: var(--ink);
  color: var(--paper) !important;
  border: var(--line);
  box-shadow: 3px 3px 0 var(--coral);
  transition: all 0.2s ease;
}

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

.nav-cta:hover {
  background: var(--coral);
  color: #fff !important;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: var(--line);
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}

.menu-toggle::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--ink);
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
}

/* ===== Hero ===== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 15%;
  right: -60px;
  width: 220px;
  height: 220px;
  background-image: radial-gradient(var(--ink) 10%, transparent 10%);
  background-size: 20px 20px;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 64px;
  z-index: 1;
}

.hero-content {
  flex: 1;
  position: relative;
}

.hero-content::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 8%;
  width: 12px;
  height: 12px;
  background: var(--coral);
  border: var(--line);
  border-radius: 50%;
  box-shadow: 3px 3px 0 rgba(27,30,40,0.1);
}

.hero-content::after {
  content: '';
  position: absolute;
  left: -44px;
  top: 22%;
  width: 8px;
  height: 8px;
  background: var(--sky);
  border: 1.5px solid var(--ink);
  border-radius: 50%;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 50px;
  background: var(--mint);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--ink);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  transform: rotate(-2deg);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -3px;
  margin-bottom: 20px;
  position: relative;
  z-index: 0;
}

.hero h1::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 0;
  width: 100%;
  height: 18px;
  background: repeating-linear-gradient(
    -45deg,
    rgba(255, 90, 69, 0.25),
    rgba(255, 90, 69, 0.25) 8px,
    transparent 8px,
    transparent 16px
  );
  z-index: -1;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.65;
  max-width: 560px;
  margin-bottom: 32px;
  border-left: 4px solid var(--coral);
  padding-left: 16px;
  font-weight: 500;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  flex-shrink: 0;
  width: 44%;
  max-width: 460px;
  border-radius: 24px;
  z-index: 1;
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: -22px;
  border: 2px dashed rgba(27,30,40,0.3);
  border-radius: 24px;
  animation: spin-slow 36s linear infinite;
  pointer-events: none;
}

.hero-image::after {
  content: '';
  position: absolute;
  top: -18px;
  right: -14px;
  width: 26px;
  height: 26px;
  background: var(--amber);
  border: var(--line);
  border-radius: 50%;
  box-shadow: 4px 4px 0 rgba(27,30,40,0.15);
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 24px;
  border: var(--line);
  box-shadow: 8px 8px 0 var(--coral);
  transform: rotate(-1.5deg);
  transition: transform 0.3s ease;
}

.hero-image:hover img {
  transform: rotate(0deg) translateY(-4px);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-weight: 800;
  cursor: pointer;
  border: var(--line);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 4px 4px 0 rgba(27,30,40,0.1);
}

.btn-primary {
  background: var(--coral);
  color: #fff;
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn-outline {
  background: transparent;
  border: var(--line);
  color: var(--ink) !important;
  box-shadow: 4px 4px 0 rgba(27,30,40,0.1);
}

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

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  padding: 4px 14px;
  background: var(--amber);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-2deg);
  margin-bottom: 14px;
  border-radius: 6px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -2px;
  margin-bottom: 14px;
  line-height: 1.1;
}

.section-desc {
  max-width: 600px;
  opacity: 0.6;
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 44px;
}

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

.category-card {
  border-radius: 18px;
  padding: 30px;
  border: var(--line);
  background: #fff;
  box-shadow: 6px 6px 0 rgba(27,30,40,0.12);
  transform: rotate(0deg);
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.category-card:nth-child(2n) {
  transform: rotate(0.7deg);
}

.category-card:nth-child(3n) {
  transform: rotate(-0.7deg);
}

.category-card:hover {
  transform: rotate(0deg) translateY(-6px);
  box-shadow: 10px 10px 0 var(--coral);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.4rem;
  background: var(--paper);
  border: var(--line);
  box-shadow: 3px 3px 0 rgba(27,30,40,0.15);
  transform: rotate(-6deg);
}

.category-card:nth-child(2n) .card-icon {
  transform: rotate(6deg);
  background: var(--amber);
}

.category-card:nth-child(3n) .card-icon {
  background: var(--mint);
}

.category-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-bottom: 16px;
}

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

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

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

.category-card:hover .card-link::after {
  transform: translateX(5px);
}

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature-image {
  border-radius: 18px;
  padding: 14px;
  background: #fff;
  border: var(--line);
  box-shadow: 8px 8px 0 rgba(27,30,40,0.12);
  transform: rotate(-2deg);
  transition: transform 0.3s ease;
  position: relative;
}

.feature-image:hover {
  transform: rotate(0deg);
}

.feature-image::after {
  content: '';
  position: absolute;
  top: -10px;
  right: -10px;
  width: 20px;
  height: 20px;
  background: var(--mint);
  border: var(--line);
  border-radius: 50%;
  z-index: 2;
}

.feature-image img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: var(--line);
  display: block;
}

.feature-block:nth-of-type(2n) .feature-image {
  transform: rotate(2deg);
}

.feature-block:nth-of-type(2n) .feature-image::after {
  background: var(--sky);
}

.feature-text h3 {
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.feature-text p {
  opacity: 0.65;
  margin-bottom: 20px;
  font-size: 1.02rem;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 9px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  border-bottom: 1px dashed rgba(27,30,40,0.2);
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--coral);
  font-size: 1.1rem;
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: 16px;
  border: var(--line);
  box-shadow: 5px 5px 0 rgba(27,30,40,0.12);
  position: relative;
  background: #fff;
  transition: transform 0.2s ease;
}

.stat-item:hover {
  transform: translateY(-4px) rotate(-1deg);
}

.stat-item:nth-child(1) {
  background: var(--coral);
  color: #fff;
}

.stat-item:nth-child(2) {
  background: var(--amber);
  color: var(--ink);
}

.stat-item:nth-child(3) {
  background: var(--mint);
  color: var(--ink);
}

.stat-item:nth-child(4) {
  background: var(--sky);
  color: #fff;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: rgba(27,30,40,0.15);
  border-radius: 4px;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  opacity: 0.7;
  margin-top: 6px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

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

.content-wall-item {
  border-radius: 16px;
  overflow: hidden;
  border: var(--line);
  background: #fff;
  box-shadow: 5px 5px 0 rgba(27,30,40,0.12);
  transition: all 0.25s ease;
}

.content-wall-item:nth-child(2n) {
  transform: rotate(0.6deg);
}

.content-wall-item:nth-child(3n) {
  transform: rotate(-0.5deg);
}

.content-wall-item:hover {
  transform: rotate(0deg) translateY(-5px);
  box-shadow: 9px 9px 0 var(--sky);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: var(--line);
  display: block;
  filter: grayscale(0.25);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.content-wall-item:hover img {
  filter: grayscale(0);
  transform: scale(1.02);
}

.content-wall-body {
  padding: 20px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.65;
}

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

.faq-item {
  border: var(--line);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  box-shadow: 4px 4px 0 rgba(27,30,40,0.1);
  transition: box-shadow 0.2s ease;
}

.faq-item:hover {
  box-shadow: 6px 6px 0 rgba(27,30,40,0.18);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 800;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  background: var(--paper);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--coral);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.65;
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.open .faq-question::after {
  transform: rotate(135deg);
  color: var(--mint);
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 60px 32px;
  text-align: center;
  border-radius: 24px;
  border: var(--line);
  background: linear-gradient(105deg, var(--coral), var(--amber));
  box-shadow: 8px 8px 0 var(--ink);
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-banner::before {
  content: '✦ ✦ ✦';
  position: absolute;
  top: 16px;
  right: 24px;
  letter-spacing: 8px;
  font-size: 1.2rem;
  opacity: 0.5;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
  width: 120px;
  height: 24px;
  background: rgba(255, 255, 255, 0.35);
  border-left: var(--line);
  border-right: var(--line);
  z-index: 0;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  opacity: 0.85;
  margin-bottom: 24px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--ink);
  border: var(--line);
  box-shadow: 4px 4px 0 var(--ink);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--mint);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 64px 0 28px;
  background: #FFF3E0;
  border-top: 4px solid var(--ink);
  box-shadow: 0 -4px 0 var(--coral);
  margin-top: 40px;
}

.site-footer .container {
  position: relative;
}

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

.footer-brand .logo {
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: var(--ink);
}

.footer-brand p {
  opacity: 0.7;
  font-size: 0.9rem;
  max-width: 260px;
  line-height: 1.8;
}

.footer-col h4 {
  font-weight: 800;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 3px;
  background: var(--coral);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.9rem;
  opacity: 0.7;
  transition: all 0.2s ease;
  font-weight: 500;
}

.footer-col a:hover {
  opacity: 1;
  color: var(--coral);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 2px solid rgba(27, 30, 40, 0.12);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.7;
}

/* ===== 工具类 ===== */
.text-accent {
  background: linear-gradient(transparent 62%, var(--amber) 62%);
  padding: 0 4px;
  font-weight: 900;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.6;
  line-height: 1.8;
  text-align: center;
}

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

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

/* ===== 动画 ===== */
@keyframes spin-slow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .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: rgba(251, 247, 240, 0.98);
    backdrop-filter: blur(14px);
    padding: 24px;
    border-bottom: var(--line);
    gap: 16px;
  }

  .main-nav.open a {
    font-size: 1.1rem;
    padding: 10px 0;
    border-bottom: 1px dashed rgba(27, 30, 40, 0.15);
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    width: 80%;
    margin: 0 auto;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.9rem;
  }
}

@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;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 2.3rem;
    letter-spacing: -2px;
  }

  .hero-image {
    width: 100%;
  }

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

  .container {
    padding: 0 16px;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }
}