*, *::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: #FAFAFE;
  color: #2D2B3A;
  line-height: 1.6;
}

/* ===== 设计系统变量 ===== */
:root {
  --purple-deep: #4A3A8A;
  --purple-main: #7B68EE;
  --purple-light: #A89BFF;
  --purple-mist: #F0EDFF;
  --gold: #F0C050;
  --gold-light: #FFE4B5;
  --gold-pale: #FFF8E7;
  --warm-white: #FFFBFA;
  --text-dark: #2D2B3A;
  --text-soft: #5E5A72;
  --text-muted: #8E8AA0;
  --shadow-sm: 0 2px 12px rgba(74, 58, 138, 0.08);
  --shadow-md: 0 8px 32px rgba(74, 58, 138, 0.12);
  --shadow-lg: 0 16px 48px rgba(74, 58, 138, 0.16);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ===== 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(--purple-mist);
}

/* ===== 装饰性山峰几何 ===== */
.section::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(135deg, var(--purple-mist) 25%, transparent 25%),
              linear-gradient(225deg, var(--purple-mist) 25%, transparent 25%);
  background-size: 60px 60px;
  background-position: 0 0, 30px 0;
  opacity: 0.3;
  pointer-events: none;
}

.section:nth-child(even)::before {
  background: linear-gradient(135deg, #FAFAFE 25%, transparent 25%),
              linear-gradient(225deg, #FAFAFE 25%, transparent 25%);
  background-size: 60px 60px;
  background-position: 0 0, 30px 0;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 251, 250, 0.88);
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid rgba(123, 104, 238, 0.12);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(74, 58, 138, 0.08);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--purple-deep);
  letter-spacing: -0.3px;
  position: relative;
}

.logo::after {
  content: '▲';
  font-size: 0.6rem;
  color: var(--gold);
  position: absolute;
  top: -6px;
  right: -16px;
  opacity: 0.6;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
  color: #fff;
  box-shadow: 0 4px 16px rgba(123, 104, 238, 0.3);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--purple-main), var(--gold));
  transition: var(--transition);
  border-radius: 2px;
}

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

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 50px !important;
  color: #fff !important;
  font-weight: 600 !important;
  background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
  box-shadow: 0 4px 16px rgba(123, 104, 238, 0.3);
  transition: var(--transition) !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 24px rgba(123, 104, 238, 0.4) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--purple-deep);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(165deg, #FAFAFE 0%, var(--purple-mist) 50%, #FFF8E7 100%);
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(240, 192, 80, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '▲';
  position: absolute;
  bottom: 40px;
  right: 80px;
  font-size: 12rem;
  color: var(--purple-main);
  opacity: 0.04;
  line-height: 1;
  pointer-events: none;
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gold-pale), var(--purple-mist));
  color: var(--purple-deep);
  border: 1px solid rgba(123, 104, 238, 0.1);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-eyebrow::before {
  content: '✦';
  color: var(--gold);
  font-size: 0.7rem;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--purple-deep);
  font-weight: 800;
  letter-spacing: -1px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--purple-main), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-soft);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg);
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 2px solid rgba(240, 192, 80, 0.2);
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
  letter-spacing: 0.2px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
  box-shadow: 0 4px 20px rgba(123, 104, 238, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(123, 104, 238, 0.4);
}

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

.btn-outline:hover {
  background: var(--purple-mist);
  transform: translateY(-3px);
}

.btn::after {
  content: '→';
  font-size: 1.1rem;
  transition: var(--transition);
}

.btn:hover::after {
  transform: translateX(4px);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-main);
  margin-bottom: 16px;
  position: relative;
}

.section-label::before {
  content: '◆';
  font-size: 0.5rem;
  color: var(--gold);
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 16px;
  color: var(--purple-deep);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.section-desc {
  max-width: 600px;
  color: var(--text-soft);
  margin-bottom: 48px;
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: var(--radius-md);
  padding: 32px 28px;
  background: var(--warm-white);
  border: 1px solid rgba(123, 104, 238, 0.08);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--purple-main), var(--gold));
  opacity: 0;
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(123, 104, 238, 0.15);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--purple-mist), var(--gold-pale));
  color: var(--purple-main);
  transition: var(--transition);
}

.category-card:hover .card-icon {
  background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
  color: #fff;
  box-shadow: 0 4px 16px rgba(123, 104, 238, 0.3);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--purple-deep);
}

.category-card p {
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--purple-main);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.card-link::after {
  content: '→';
  transition: var(--transition);
}

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

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

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-block:nth-child(even) .feature-image {
  order: 2;
}

.feature-block:nth-child(even) .feature-text {
  order: 1;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 2px solid rgba(240, 192, 80, 0.15);
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.feature-image:hover img {
  transform: scale(1.02);
}

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--purple-deep);
  margin-bottom: 16px;
  line-height: 1.2;
}

.feature-text p {
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-dark);
  font-weight: 500;
  border-bottom: 1px solid rgba(123, 104, 238, 0.06);
}

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

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--gold);
  font-size: 0.8rem;
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--warm-white);
  border: 1px solid rgba(123, 104, 238, 0.08);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--purple-main), var(--gold));
  opacity: 0;
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--purple-deep);
  line-height: 1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--warm-white);
  border: 1px solid rgba(123, 104, 238, 0.08);
  transition: var(--transition);
  cursor: pointer;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(123, 104, 238, 0.15);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition);
}

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--purple-deep);
  margin-bottom: 8px;
}

.content-wall-body p {
  color: var(--text-soft);
  font-size: 0.9rem;
  line-height: 1.6;
}

.wall-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
  background: var(--purple-mist);
  color: var(--purple-main);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

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

.faq-item {
  border: 1px solid rgba(123, 104, 238, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--warm-white);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(123, 104, 238, 0.2);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--purple-deep);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--purple-main);
  font-weight: 300;
  transition: var(--transition);
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideIn 0.3s ease;
}

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

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--purple-deep), var(--purple-main));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '▲';
  position: absolute;
  top: -40px;
  left: -20px;
  font-size: 18rem;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(240, 192, 80, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 500px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--purple-deep);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.cta-banner .btn-primary::after {
  content: '→';
  color: var(--purple-main);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 72px 0 28px;
  background: var(--purple-deep);
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--purple-light), var(--gold));
  opacity: 0.6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand h3::before {
  content: '▲';
  font-size: 0.8rem;
  color: var(--gold);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

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

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--gold);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom .social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
}

.footer-bottom .social-links a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  font-size: 1.1rem;
  transition: var(--transition);
}

.footer-bottom .social-links a:hover {
  color: var(--gold);
  transform: translateY(-2px);
}

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

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

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

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

/* ===== 装饰性山峰元素 ===== */
.peak-divider {
  width: 100%;
  height: 80px;
  position: relative;
  overflow: hidden;
}

.peak-divider::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: 
    polygon(0% 100%, 10% 40%, 20% 60%, 30% 20%, 40% 50%, 50% 10%, 60% 45%, 70% 25%, 80% 55%, 90% 30%, 100% 100%);
  -webkit-clip-path: polygon(0% 100%, 10% 40%, 20% 60%, 30% 20%, 40% 50%, 50% 10%, 60% 45%, 70% 25%, 80% 55%, 90% 30%, 100% 100%);
  clip-path: polygon(0% 100%, 10% 40%, 20% 60%, 30% 20%, 40% 50%, 50% 10%, 60% 45%, 70% 25%, 80% 55%, 90% 30%, 100% 100%);
  background: linear-gradient(135deg, var(--purple-mist), var(--gold-pale));
  opacity: 0.3;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .feature-block {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
    padding-top: 72px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .feature-block:nth-child(even) .feature-image {
    order: 1;
  }
  
  .feature-block:nth-child(even) .feature-text {
    order: 2;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.7rem;
  }
  
  .main-nav {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 251, 250, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid rgba(123, 104, 238, 0.1);
  }
  
  .main-nav.open a {
    padding: 12px 0;
    font-size: 1rem;
  }
  
  .nav-cta {
    text-align: center;
    padding: 14px 24px !important;
  }

  .cta-banner {
    padding: 40px 24px;
  }
  
  .cta-banner h2 {
    font-size: 1.6rem;
  }

  .content-wall {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero-eyebrow {
    font-size: 0.7rem;
  }
  
  .section-title {
    font-size: 1.4rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }

  .content-wall {
    grid-template-columns: 1fr;
  }
  
  .feature-block {
    gap: 24px;
  }
  
  .feature-text h3 {
    font-size: 1.4rem;
  }
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--purple-mist);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--purple-main), var(--purple-deep));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--purple-deep);
}

/* ===== 选中样式 ===== */
::selection {
  background: rgba(123, 104, 238, 0.2);
  color: var(--purple-deep);
}

/* ===== 焦点样式 ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
  border-radius: 4px;
}