/* ================================================================
   作文小事 官方网站样式 v2
   品牌色：暖橙 #FF8C42  辅助：紫 #7C4DFF  金 #FFB800
   设计：现代、温暖、专业
   ================================================================ */

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

:root {
  --brand: #FF8C42;
  --brand-dark: #E67A30;
  --brand-deeper: #D46520;
  --brand-light: #FFF3E6;
  --brand-lighter: #FFF9F2;
  --purple: #7C4DFF;
  --purple-light: #EDE7FF;
  --gold: #FFB800;
  --gold-light: #FFF8E0;
  --text: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-gray: #6b6b7b;
  --text-light: #999;
  --bg: #FFFBFA;
  --bg-alt: #FFF8F3;
  --bg-white: #FFFFFF;
  --border: #f0e8e0;
  --border-light: #f5f0ea;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

/* ========== 导航栏 ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}
.nav-scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.05), 0 4px 20px rgba(0,0,0,0.04);
  padding: 10px 0;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
  position: relative;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 22px; color: var(--brand);
  z-index: 2;
}
.brand-icon { font-size: 30px; line-height: 1; }
.brand-text { letter-spacing: 0.5px; }

.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 15px; color: var(--text-secondary); font-weight: 500;
  transition: color var(--transition); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--brand); border-radius: 1px; transition: width var(--transition);
}
.nav-links a:hover { color: var(--brand); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff; border: none; padding: 10px 26px; border-radius: 24px;
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: all var(--transition); box-shadow: 0 4px 14px rgba(255,140,66,0.3);
  z-index: 2;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,140,66,0.4);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px; z-index: 2;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* 移动端菜单 */
.nav-mobile {
  display: none; flex-direction: column; gap: 4px;
  background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
  padding: 20px 32px; border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-lg); position: absolute; top: 100%; left: 0; right: 0;
  transform: translateY(-10px); opacity: 0; pointer-events: none;
  transition: all var(--transition);
}
.nav-mobile.open {
  transform: translateY(0); opacity: 1; pointer-events: auto;
}
.nav-mobile a {
  padding: 12px 16px; font-size: 16px; font-weight: 600; color: var(--text-secondary);
  border-radius: var(--radius-sm); transition: all var(--transition);
}
.nav-mobile a:hover { background: var(--brand-light); color: var(--brand); }
.nav-mobile a:last-child {
  background: var(--brand); color: #fff; text-align: center;
  border-radius: 24px; margin-top: 8px;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 160px 32px 120px;
  background: linear-gradient(175deg, #FFF3E6 0%, #FFFAF5 30%, var(--bg) 70%, #fff 100%);
  min-height: 100vh; display: flex; align-items: center;
  overflow: hidden;
}

/* Hero 背景装饰 */
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; }
.shape {
  position: absolute; border-radius: 50%; opacity: 0.4;
  filter: blur(60px);
}
.shape-1 {
  width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,140,66,0.2), transparent);
  top: -100px; right: -100px;
}
.shape-2 {
  width: 300px; height: 300px; background: radial-gradient(circle, rgba(124,77,255,0.12), transparent);
  bottom: -50px; left: -80px;
}
.shape-3 {
  width: 200px; height: 200px; background: radial-gradient(circle, rgba(255,184,0,0.15), transparent);
  top: 50%; right: 30%;
}

.hero-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
  position: relative; z-index: 1;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.85); border: 1px solid #FFD4A8;
  color: #E65100; font-size: 14px; font-weight: 700;
  padding: 8px 22px; border-radius: 24px; margin-bottom: 28px;
  backdrop-filter: blur(10px); box-shadow: 0 2px 12px rgba(255,140,66,0.08);
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--brand);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: 52px; font-weight: 900; line-height: 1.3; margin-bottom: 24px;
  letter-spacing: -0.5px; color: var(--text);
}
.hero-highlight {
  color: var(--brand); position: relative; white-space: nowrap;
}
.hero-highlight::after {
  content: ''; position: absolute; bottom: 6px; left: 0; right: 0; height: 14px;
  background: rgba(255,140,66,0.18); border-radius: 7px; z-index: -1;
}

.hero-desc {
  font-size: 18px; color: var(--text-gray); line-height: 2; margin-bottom: 36px;
}
.hero-desc strong { color: var(--text); font-weight: 700; }

.hero-actions { display: flex; gap: 16px; margin-bottom: 48px; }

.btn-primary {
  background: linear-gradient(135deg, #FF8C42 0%, #FF6B35 100%);
  color: #fff; border: none; padding: 18px 38px; border-radius: 32px;
  font-size: 18px; font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 28px rgba(255,108,53,0.35);
  transition: all var(--transition);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(255,108,53,0.45);
}
.btn-arrow { transition: transform var(--transition); }
.btn-primary:hover .btn-arrow { transform: translateX(4px); }

.btn-secondary {
  background: #fff; color: var(--brand); border: 2px solid #FFD4A8;
  padding: 18px 38px; border-radius: 32px; font-size: 18px; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { background: var(--brand-light); border-color: var(--brand); }
.btn-arrow-down { transition: transform var(--transition); }
.btn-secondary:hover .btn-arrow-down { transform: translateY(3px); }

.hero-stats { display: flex; gap: 36px; margin-bottom: 28px; }
.hero-stat { display: flex; align-items: center; gap: 12px; }
.hs-icon { font-size: 28px; }
.hs-num { font-size: 22px; font-weight: 800; color: var(--brand); display: block; line-height: 1.3; }
.hs-label { font-size: 13px; color: var(--text-light); display: block; }

.hero-trust { display: flex; gap: 20px; font-size: 13px; color: var(--text-light); }
.hero-trust span { display: flex; align-items: center; gap: 4px; }

/* Hero Mockup */
.hero-visual { display: flex; justify-content: center; position: relative; }
.hero-mockup { perspective: 1000px; position: relative; }
.mockup-screen {
  background: #fff; border-radius: 28px; padding: 0;
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0,0,0,0.04);
  width: 400px; overflow: hidden;
  transform: rotateY(-5deg) rotateX(2deg);
  transition: transform 0.5s ease;
}
.hero-mockup:hover .mockup-screen { transform: rotateY(-2deg) rotateX(1deg); }

.mockup-header {
  background: #faf8f5; padding: 14px 22px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid #f0e8e0;
}
.mockup-time { font-size: 12px; font-weight: 700; color: var(--text); }
.mockup-dots { display: flex; gap: 5px; }
.mockup-dot { width: 7px; height: 7px; border-radius: 50%; background: #d0c8c0; }

.mockup-content { padding: 32px 26px 36px; }
.mockup-score { text-align: center; margin-bottom: 20px; }
.mockup-score-label { display: block; font-size: 13px; color: var(--text-light); margin-bottom: 4px; }
.mockup-score-num {
  font-size: 64px; font-weight: 900; color: var(--brand); line-height: 1;
}
.mockup-score-unit { font-size: 22px; font-weight: 600; color: var(--brand); margin-left: 4px; }

.mockup-comment {
  background: linear-gradient(135deg, #FFF8F0, #FFF3E6);
  border-radius: 16px; padding: 18px; margin-bottom: 18px;
  display: flex; gap: 12px; align-items: flex-start;
}
.mockup-comment-avatar { font-size: 32px; flex-shrink: 0; }
.mockup-comment-text p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

.mockup-features {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-size: 12px; color: var(--text-light);
}
.mockup-features span {
  background: #f8f8f8; padding: 6px 12px; border-radius: 10px;
  font-weight: 500;
}

/* 浮动卡片 */
.mockup-float {
  position: absolute; background: #fff; border-radius: 16px;
  padding: 12px 18px; font-size: 14px; font-weight: 700;
  box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: 8px;
  animation: float 3s ease-in-out infinite;
  white-space: nowrap;
}
.mockup-float span { font-size: 20px; }
.float-1 { top: 60px; right: -30px; animation-delay: 0s; }
.float-2 { bottom: 60px; left: -20px; animation-delay: 1.5s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ========== 通用 Section ========== */
.section { padding: 100px 32px; position: relative; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center; margin-bottom: 64px; max-width: 700px; margin-left: auto; margin-right: auto;
}
.section-label {
  display: inline-block; font-size: 13px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 2px; color: var(--brand);
  background: rgba(255,140,66,0.08); padding: 6px 16px; border-radius: 16px;
  margin-bottom: 20px;
}
.section-title {
  font-size: 40px; font-weight: 900; margin-bottom: 16px;
  color: var(--text); letter-spacing: -0.5px; line-height: 1.3;
}
.section-subtitle { font-size: 18px; color: var(--text-gray); line-height: 1.6; }

/* ========== 滚动渐显动画 ========== */
[data-reveal] {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-reveal].revealed { opacity: 1; transform: translateY(0); }

/* 延迟变体 */
.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.08s; }
.feature-card:nth-child(3) { transition-delay: 0.16s; }
.feature-card:nth-child(4) { transition-delay: 0.24s; }
.feature-card:nth-child(5) { transition-delay: 0.32s; }
.feature-card:nth-child(6) { transition-delay: 0.40s; }

/* ========== 功能卡片 ========== */
.features-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.feature-card {
  background: #fff; border-radius: var(--radius-lg); padding: 36px 28px 28px;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  border: 1px solid var(--border-light); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--gold));
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { transform: scaleX(1); }

.fc-icon-wrap {
  width: 60px; height: 60px; border-radius: 18px; background: var(--brand-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  transition: all var(--transition);
}
.feature-card:hover .fc-icon-wrap { background: var(--brand); }
.feature-card:hover .fc-icon-wrap .fc-icon { transform: scale(1.1); }
.fc-icon { font-size: 32px; transition: transform var(--transition); }

.feature-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; color: var(--text); }
.feature-card > p { font-size: 14px; color: var(--text-gray); line-height: 1.8; margin-bottom: 18px; }

.fc-tags {
  list-style: none; display: flex; flex-wrap: wrap; gap: 8px;
}
.fc-tags li {
  font-size: 12px; color: var(--brand-dark); background: var(--brand-light);
  padding: 4px 12px; border-radius: 12px; font-weight: 600;
}

/* ========== 专项批改 ========== */
.special-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.special-card {
  background: #fff; border-radius: var(--radius-lg); padding: 36px 24px;
  text-align: center; position: relative; overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.special-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.sc-badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 11px; font-weight: 800; padding: 4px 12px; border-radius: 12px;
  letter-spacing: 0.5px;
}
.special-card:nth-child(1) .sc-badge { background: #E8F5E9; color: #2E7D32; }
.special-card:nth-child(2) .sc-badge { background: #FFE0B2; color: #E65100; }

.sc-icon { font-size: 48px; margin-bottom: 18px; display: block; }
.special-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
.special-card p { font-size: 14px; color: var(--text-gray); line-height: 1.7; }
.special-card strong { color: var(--brand); }

/* ========== 使用流程 ========== */
.steps-grid {
  max-width: 1000px; margin: 0 auto;
  display: flex; align-items: flex-start; justify-content: center; gap: 0;
}
.step-card {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 28px;
  text-align: center; flex: 1; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light); transition: all var(--transition);
  position: relative;
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.step-number {
  width: 56px; height: 56px; margin: 0 auto 12px;
  background: linear-gradient(135deg, #FF8C42, #FF6B35);
  color: #fff; border-radius: 50%; font-size: 26px; font-weight: 900;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(255,140,66,0.3);
}
.step-icon { font-size: 36px; margin-bottom: 8px; display: block; }
.step-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; }
.step-card p { font-size: 14px; color: var(--text-gray); line-height: 1.8; }

.step-connector {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 0 16px; margin-top: 80px;
}
.step-dot {
  width: 8px; height: 8px; border-radius: 50%; background: #FFD4A8;
}
.step-dot:nth-child(2) { background: #FFB87A; }
.step-dot:nth-child(3) { background: var(--brand); }

/* ========== 学段覆盖 ========== */
.grades-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.grade-card {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 28px;
  box-shadow: var(--shadow-sm); text-align: center;
  border: 2px solid transparent; position: relative; overflow: hidden;
  transition: all var(--transition);
}
.grade-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
}
.grade-card:nth-child(1)::before { background: linear-gradient(90deg, #FF8C42, #FFB74D); }
.grade-card:nth-child(2)::before { background: linear-gradient(90deg, #7C4DFF, #B388FF); }
.grade-card:nth-child(3)::before { background: linear-gradient(90deg, #FF6B35, #FF8C42); }
.grade-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.grade-card.highlight { border-color: #FFD4A8; background: linear-gradient(180deg, #FFFCF8, #fff); }

.gc-top { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 8px; }
.gc-icon { font-size: 48px; }
.gc-range {
  font-size: 13px; font-weight: 700; color: var(--text-light);
  background: #f5f5f5; padding: 4px 14px; border-radius: 14px;
}
.grade-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 10px; }
.grade-card > p { font-size: 14px; color: var(--text-gray); line-height: 1.8; margin-bottom: 20px; }
.gc-list { list-style: none; text-align: left; }
.gc-list li {
  font-size: 13px; color: var(--text-secondary); padding: 7px 0;
  border-bottom: 1px dashed #f0e8e0; line-height: 1.6; display: flex; align-items: flex-start; gap: 8px;
}
.gc-list li::before { content: '✓'; color: var(--brand); font-weight: 800; flex-shrink: 0; }

/* ========== 资源 ========== */
.resources-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.resource-card {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 28px;
  box-shadow: var(--shadow-sm); text-align: center;
  border: 1px solid var(--border-light); transition: all var(--transition);
}
.resource-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.rc-icon-wrap {
  width: 72px; height: 72px; border-radius: 22px;
  background: var(--brand-light); margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.resource-card:hover .rc-icon-wrap { background: var(--brand); }
.rc-icon { font-size: 36px; transition: transform var(--transition); }
.resource-card:hover .rc-icon { transform: scale(1.1); }

.resource-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.resource-card > p { font-size: 14px; color: var(--text-gray); line-height: 1.8; margin-bottom: 20px; }
.rc-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.rc-tags li {
  background: var(--brand-light); color: var(--brand-dark);
  padding: 6px 14px; border-radius: 14px; font-size: 13px; font-weight: 600;
  transition: all var(--transition);
}
.rc-tags li:hover { background: var(--brand); color: #fff; }

/* ========== Why Us ========== */
.why-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.why-card {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 24px;
  text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.why-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.wc-icon-wrap {
  width: 64px; height: 64px; border-radius: 20px;
  background: linear-gradient(135deg, var(--brand-light), #FFE8D6);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px; transition: all var(--transition);
}
.why-card:hover .wc-icon-wrap { background: linear-gradient(135deg, var(--brand), var(--brand-dark)); }
.wc-icon { font-size: 30px; transition: transform var(--transition); }
.why-card:hover .wc-icon { transform: scale(1.1); }

.why-card h3 { font-size: 19px; font-weight: 800; margin-bottom: 10px; }
.why-card p { font-size: 14px; color: var(--text-gray); line-height: 1.8; }

/* ========== 用户评价 ========== */
.testimonials-scroll {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.testimonial-card {
  background: #fff; border-radius: var(--radius-lg); padding: 36px 28px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.tc-stars { font-size: 18px; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-card > p {
  font-size: 15px; color: var(--text-secondary); line-height: 1.9;
  margin-bottom: 20px; font-style: italic; position: relative;
  padding-left: 20px;
}
.testimonial-card > p::before {
  content: '"'; position: absolute; left: 0; top: -6px;
  font-size: 40px; color: var(--brand); font-weight: 900;
  font-style: normal; opacity: 0.3; line-height: 1;
}
.tc-author { display: flex; align-items: center; gap: 12px; }
.tc-avatar { font-size: 36px; }
.tc-author strong { display: block; font-size: 15px; color: var(--text); }
.tc-author span { font-size: 12px; color: var(--text-light); }

/* ========== CTA ========== */
.cta-section {
  position: relative; overflow: hidden;
  background: linear-gradient(150deg, #FFE8D0 0%, #FFF3E6 30%, #FFE0B2 70%, #FFDBA8 100%);
  padding: 100px 32px; text-align: center;
}
.cta-bg-glow {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,140,66,0.15), transparent 70%);
  pointer-events: none;
}
.cta-inner { max-width: 600px; margin: 0 auto; position: relative; z-index: 1; }
.cta-label {
  display: inline-block; font-size: 13px; font-weight: 700;
  letter-spacing: 2px; color: var(--brand-dark);
  background: rgba(255,255,255,0.7); padding: 6px 18px;
  border-radius: 16px; margin-bottom: 20px;
}
.cta-title { font-size: 40px; font-weight: 900; margin-bottom: 16px; color: var(--text); }
.cta-desc { font-size: 18px; color: var(--text-secondary); margin-bottom: 40px; }
.cta-qr { margin-bottom: 28px; }
.qr-image {
  width: 200px; height: 200px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
}
.qr-image:hover { transform: scale(1.03); box-shadow: var(--shadow-xl); }
.qr-hint {
  font-size: 14px; color: var(--text-secondary); margin-top: 12px;
}
.qr-placeholder {
  display: inline-flex; flex-direction: column; align-items: center; gap: 16px;
  background: #fff; padding: 48px 56px; border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg); transition: all var(--transition);
}
.qr-placeholder:hover { transform: scale(1.03); box-shadow: var(--shadow-xl); }
.qr-icon { font-size: 80px; }
.qr-text { font-size: 18px; color: var(--text-secondary); text-align: center; line-height: 1.8; }
.qr-text strong { color: var(--brand); font-size: 24px; }
.cta-hint { font-size: 14px; color: var(--text-light); }

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 14px;
}
.faq-item {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.faq-item:hover { border-color: #FFD4A8; }
.faq-item summary {
  font-size: 17px; font-weight: 700; padding: 24px 32px; outline: none;
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  user-select: none; color: var(--text);
  transition: color var(--transition);
}
.faq-item summary:hover { color: var(--brand); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 24px; color: var(--brand); font-weight: 400;
  width: 32px; height: 32px; display: flex; align-items: center;
  justify-content: center; border-radius: 50%; background: var(--brand-light);
  transition: all var(--transition); flex-shrink: 0;
}
.faq-item[open] summary::after { content: '−'; background: var(--brand); color: #fff; }
.faq-item[open] summary { color: var(--brand); }
.faq-answer {
  padding: 0 32px 24px;
}
.faq-answer p {
  font-size: 15px; color: var(--text-secondary); line-height: 1.9;
}
.faq-answer strong { color: var(--brand); }

/* ========== Footer ========== */
.footer {
  background: linear-gradient(180deg, #2B2520 0%, #1f1a16 100%);
  color: #b8b0a8; padding: 72px 32px 0;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; gap: 60px; padding-bottom: 48px;
  border-bottom: 1px solid #3a3530;
}
.footer-brand { display: flex; align-items: flex-start; gap: 16px; max-width: 340px; }
.footer-brand-icon { font-size: 38px; line-height: 1; }
.footer-brand h3 { font-size: 22px; color: #fff; margin-bottom: 6px; font-weight: 800; }
.footer-brand p { font-size: 13px; line-height: 1.7; }
.footer-brand-desc { margin-top: 12px; color: #8a827a; font-size: 12px !important; }

.footer-links { display: flex; gap: 64px; }
.fl-group h4 { font-size: 14px; color: #fff; margin-bottom: 18px; font-weight: 700; letter-spacing: 0.5px; }
.fl-group a, .fl-group span {
  display: block; font-size: 13px; color: #9a928a; margin-bottom: 12px;
  transition: color var(--transition); line-height: 1.4;
}
.fl-group a:hover { color: var(--brand); }

.footer-bottom { padding: 24px 0; }
.footer-bottom-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
}
.footer-bottom p { font-size: 13px; color: #6a625a; }
.footer-bottom-links a { font-size: 13px; color: #6a625a; transition: color var(--transition); }
.footer-bottom-links a:hover { color: var(--brand); }
.footer-beian-sep { font-size: 13px; color: #4a4540; margin: 0 8px; user-select: none; }
.footer-beian {
  text-align: center; padding-top: 12px; border-top: 1px solid #3a3530;
  margin-top: 12px;
}
.footer-beian a {
  font-size: 13px; color: #6a625a; transition: color var(--transition);
}
.footer-beian a:hover { color: var(--brand); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .special-grid { grid-template-columns: repeat(2, 1fr); }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .resource-card:last-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile { display: flex; }

  .hero { padding: 120px 24px 80px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-title { font-size: 36px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; flex-wrap: wrap; }
  .hero-trust { justify-content: center; flex-wrap: wrap; }
  .hero-visual { display: none; }
  .hero-desc-br { display: none; }

  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .grades-grid { grid-template-columns: 1fr; max-width: 460px; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { flex-direction: column; align-items: center; }
  .step-connector {
    flex-direction: row; margin-top: 0; padding: 8px 0;
  }
  .step-dot { width: 8px; height: 8px; }
  .testimonials-scroll { grid-template-columns: 1fr; max-width: 500px; }

  .section-title { font-size: 30px; }
  .footer-inner { flex-direction: column; gap: 40px; }
  .footer-links { gap: 40px; flex-wrap: wrap; }
}

@media (max-width: 600px) {
  .hero { padding: 100px 20px 60px; min-height: auto; }
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .hero-badge { font-size: 12px; padding: 6px 16px; }
  .hero-stats { gap: 16px; }
  .hero-stat { gap: 8px; }
  .hs-icon { font-size: 22px; }
  .hs-num { font-size: 18px; }

  .section { padding: 64px 20px; }
  .section-title { font-size: 26px; }
  .section-subtitle { font-size: 15px; }

  .nav-inner { padding: 0 20px; }

  .features-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .special-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }

  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; text-align: center; }

  .mockup-screen { width: 100%; max-width: 320px; }
  .cta-section { padding: 64px 20px; }
  .cta-title { font-size: 28px; }
  .qr-placeholder { padding: 32px 36px; }
  .qr-icon { font-size: 56px; }

  .faq-item summary { font-size: 15px; padding: 20px 20px; }
  .faq-answer { padding: 0 20px 20px; }

  .footer-inner { text-align: center; }
  .footer-brand { flex-direction: column; align-items: center; text-align: center; max-width: none; }
  .footer-links { justify-content: center; text-align: center; }
  .footer-bottom-inner { flex-direction: column; gap: 8px; text-align: center; }
}

/* =================================================================
   内容页通用样式（热点素材、历年真题、同步辅导）
   ================================================================= */

/* 站点导航 */
.site-header { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 24px; height: 60px; }
.logo { font-size: 20px; font-weight: 700; color: var(--brand); text-decoration: none; }
.main-nav { display: flex; gap: 8px; }
.main-nav a { padding: 8px 16px; border-radius: 8px; font-size: 14px; color: var(--text-secondary); text-decoration: none; transition: all var(--transition); }
.main-nav a:hover, .main-nav a.active { background: var(--brand-light); color: var(--brand); }

/* 面包屑 */
.breadcrumb { max-width: 1200px; margin: 0 auto; padding: 16px 24px 0; }
.breadcrumb ol { display: flex; align-items: center; list-style: none; flex-wrap: wrap; }
.breadcrumb li { font-size: 13px; color: var(--text-gray); }
.breadcrumb a { color: var(--brand); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.crumb-sep { margin: 0 8px; color: var(--text-light); }

/* 页面主体 */
.page-content { max-width: 1200px; margin: 0 auto; padding: 0 24px 60px; }

/* 页面 Hero */
.page-hero { text-align: center; padding: 48px 0 32px; }
.page-hero h1 { font-size: 32px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.page-hero-desc { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 16px; }
.page-stats { font-size: 14px; color: var(--text-gray); }
.stat-sep { margin: 0 8px; color: var(--border); }

/* 内容卡片 */
.content-card { background: var(--bg-white); border: 1px solid var(--border); border-radius: 12px; padding: 24px; margin-bottom: 16px; transition: all var(--transition); }
.content-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.card-number { font-size: 24px; font-weight: 700; color: var(--brand); min-width: 36px; }
.card-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge-hot { background: #FF4444; color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 4px; font-weight: 600; }
.card-date { font-size: 13px; color: var(--text-gray); }
.card-grade { font-size: 12px; color: var(--purple); background: var(--purple-light); padding: 2px 8px; border-radius: 4px; }
.card-title { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.card-title a { color: var(--text); text-decoration: none; transition: color var(--transition); }
.card-title a:hover { color: var(--brand); }
.card-summary { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.card-footer { display: flex; justify-content: space-between; align-items: center; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.card-tag { font-size: 12px; padding: 3px 10px; background: var(--brand-light); color: var(--brand-dark); border-radius: 12px; }
.card-link { font-size: 14px; color: var(--brand); text-decoration: none; font-weight: 500; }
.card-link:hover { text-decoration: underline; }

/* 分页 */
.pagination { display: flex; justify-content: center; align-items: center; gap: 16px; padding: 32px 0; }
.page-prev, .page-next { padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px; color: var(--brand); text-decoration: none; font-size: 14px; transition: all var(--transition); }
.page-prev:hover, .page-next:hover { background: var(--brand-light); }
.page-info { font-size: 14px; color: var(--text-gray); }

/* 详情页 */
.detail-page { display: grid; grid-template-columns: 1fr 280px; gap: 32px; padding-top: 24px; }
.detail-article { background: var(--bg-white); border: 1px solid var(--border); border-radius: 12px; padding: 32px; }
.detail-header { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border-light); }
.detail-header h1 { font-size: 26px; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 12px; }
.detail-meta { display: flex; gap: 16px; font-size: 13px; color: var(--text-gray); flex-wrap: wrap; margin-bottom: 12px; }
.detail-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.detail-section { margin-bottom: 28px; }
.detail-section h2 { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 12px; padding-left: 12px; border-left: 3px solid var(--brand); }
.detail-text { font-size: 15px; color: var(--text-secondary); line-height: 1.8; }

/* 素材项 */
.materials-list { display: flex; flex-direction: column; gap: 12px; }
.material-item { display: flex; gap: 12px; padding: 12px; background: var(--brand-lighter); border-radius: 8px; }
.material-type { flex-shrink: 0; font-size: 12px; padding: 4px 10px; border-radius: 4px; font-weight: 600; white-space: nowrap; }
.material-fact { background: #E3F2FD; color: #1565C0; }
.material-quote { background: #FFF3E0; color: #E65100; }
.material-example { background: #E8F5E9; color: #2E7D32; }
.material-data { background: #F3E5F5; color: #7B1FA2; }
.material-content { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* 写作角度 */
.angles-list { display: flex; flex-direction: column; gap: 12px; }
.angle-item { padding: 16px; background: var(--bg-alt); border-radius: 8px; }
.angle-item h3 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.angle-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* 参考题目 */
.ref-topics-list { list-style: none; padding: 0; }
.ref-topics-list li { padding: 8px 12px; font-size: 14px; color: var(--text-secondary); border-bottom: 1px solid var(--border-light); }
.ref-topics-list li:last-child { border-bottom: none; }
.ref-topics-list li::before { content: '📝 '; }

/* 真题题目 */
.exam-question { padding: 20px; background: var(--bg-alt); border-radius: 8px; border-left: 4px solid var(--purple); font-size: 15px; color: var(--text); line-height: 1.8; }

/* 满分范文 */
.fullscore-essay { padding: 16px; background: var(--gold-light); border-radius: 8px; }
.fullscore-essay h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.essay-excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.essay-highlights h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.essay-highlights ul { list-style: none; padding: 0; }
.essay-highlights li { font-size: 13px; color: var(--text-secondary); padding: 3px 0; }
.essay-highlights li::before { content: '✓ '; color: #4CAF50; }

/* 真题分组 */
.exam-group { margin-bottom: 32px; }
.exam-group-title { font-size: 20px; font-weight: 600; color: var(--text); margin-bottom: 16px; padding-left: 12px; border-left: 3px solid var(--purple); }

/* 侧边栏 */
.detail-sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-card { padding: 20px; background: var(--bg-alt); border-radius: 12px; }
.sidebar-card h3 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.sidebar-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* 年级网格 */
.grade-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 0 0 40px; }
.grade-card { background: var(--bg-white); border: 1px solid var(--border); border-radius: 12px; padding: 24px; text-align: center; transition: all var(--transition); }
.grade-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.grade-icon { font-size: 32px; margin-bottom: 8px; }
.grade-card h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.grade-card p { font-size: 13px; color: var(--text-gray); margin-bottom: 12px; }

/* 单元列表 */
.unit-list { display: flex; flex-direction: column; gap: 12px; padding: 0 0 40px; }
.unit-card { background: var(--bg-white); border: 1px solid var(--border); border-radius: 10px; padding: 20px; display: flex; align-items: center; gap: 16px; }
.unit-number { font-size: 13px; font-weight: 600; color: var(--brand); background: var(--brand-light); padding: 4px 12px; border-radius: 6px; white-space: nowrap; }
.unit-card h3 { font-size: 16px; font-weight: 600; color: var(--text); flex: 1; }
.unit-card p { font-size: 14px; color: var(--text-secondary); }

/* 返回导航 */
.back-nav { padding: 0 0 32px; }
.back-nav a { font-size: 14px; color: var(--brand); text-decoration: none; }
.back-nav a:hover { text-decoration: underline; }

/* 站点页脚 */
.site-footer { background: var(--text); color: #fff; padding: 48px 24px 0; margin-top: 60px; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; gap: 48px; padding-bottom: 32px; }
.footer-info h3 { font-size: 18px; margin-bottom: 8px; }
.footer-info p { font-size: 13px; color: #aaa; line-height: 1.6; }
.footer-tagline { color: var(--brand) !important; margin-top: 4px; }
.footer-links { display: flex; gap: 48px; }
.footer-col h4 { font-size: 14px; margin-bottom: 12px; color: #ddd; }
.footer-col a { display: block; font-size: 13px; color: #999; text-decoration: none; margin-bottom: 6px; transition: color var(--transition); }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { padding: 24px 0; border-top: 1px solid #333; text-align: center; }
.footer-bottom-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 13px; color: #6a625a; }
.footer-bottom-links a { font-size: 13px; color: #6a625a; text-decoration: none; }
.footer-bottom-links a:hover { color: var(--brand); }
.footer-beian { text-align: center; padding-top: 12px; border-top: 1px solid #3a3530; margin-top: 12px; }
.footer-beian a { font-size: 13px; color: #6a625a; text-decoration: none; transition: color var(--transition); }
.footer-beian a:hover { color: var(--brand); }

/* 响应式 */
@media (max-width: 900px) {
  .detail-page { grid-template-columns: 1fr; }
  .detail-sidebar { display: none; }
  .grade-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { flex-direction: column; gap: 32px; }
}
@media (max-width: 600px) {
  .page-hero h1 { font-size: 24px; }
  .grade-grid { grid-template-columns: 1fr; }
  .main-nav { gap: 4px; }
  .main-nav a { padding: 6px 10px; font-size: 13px; }
  .card-header { flex-direction: column; align-items: flex-start; }
  .unit-card { flex-direction: column; align-items: flex-start; }
  .detail-article { padding: 20px; }
  .detail-header h1 { font-size: 22px; }
  .material-item { flex-direction: column; }
}

/* ========== 打印样式 ========== */
@media print {
  .nav, .footer, .cta-section, .hero-visual, .site-header, .site-footer, .detail-sidebar { display: none; }
  .hero { min-height: auto; padding: 40px 0; }
  body { background: #fff; color: #000; }
}