/* ============================================================
   style.css – 宁波沙耶化妆品有限公司
   品牌官网 · 一页式营销型网页样式表
   移动优先 · 响应式设计
   ============================================================ */

/* ============================================================
   1. CSS 变量 (Design Tokens)
   ============================================================ */
:root {
  /* 品牌色 */
  --primary: #9B6B7E;
  --primary-dark: #7A4F62;
  --primary-light: #C494A8;
  --secondary: #D9B4C2;
  --secondary-light: #F0E0E6;
  --accent: #E8A87C;
  --accent-light: #F5D4B8;
  --bg: #FAF6F2;
  --bg-white: #FFFFFF;
  --text: #3D2C33;
  --text-light: #6B5563;
  --text-muted: #A08A96;

  /* 功能色 */
  --shadow: rgba(61, 44, 51, 0.10);
  --shadow-hover: rgba(155, 107, 126, 0.30);
  --border-light: rgba(217, 180, 194, 0.35);
  --star-gold: #F5B342;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 40px;
  --spacing-section: 60px;
  --spacing-section-mobile: 40px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s ease;
  --transition-slow: 0.5s ease;

  /* 容器 */
  --container-max: 1200px;
  --container-padding: 20px;
}

/* ============================================================
   2. 重置与基础样式 (Reset & Base)
   ============================================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--primary-dark);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* ============================================================
   3. 排版 (Typography)
   ============================================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

h1 {
  font-size: 2.2rem;
  letter-spacing: -0.02em;
}
h2 {
  font-size: 1.8rem;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-lg);
}
h3 {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
}
h4 {
  font-size: 1.1rem;
}
p {
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--secondary-light);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

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

/* ============================================================
   4. 通用组件 (Components)
   ============================================================ */

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-med);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  min-height: 54px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(155, 107, 126, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(155, 107, 126, 0.25);
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: #D4946A;
  border-color: #D4946A;
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(232, 168, 124, 0.40);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.9rem;
  min-height: 44px;
}

/* ---- 卡片 ---- */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 20px var(--shadow);
  transition: all var(--transition-med);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(61, 44, 51, 0.12);
}

/* ---- 区块标题通用 ---- */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}
.section-title h2 {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}
.section-title h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  margin: var(--spacing-sm) auto 0;
}
.section-title p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-light);
}

/* ---- 图片占位样式 ---- */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-round {
  border-radius: var(--radius-md);
}

/* ============================================================
   5. 置顶导览列 (Header)
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(217, 180, 194, 0.25);
  transition: box-shadow var(--transition-med);
}
.site-header.scrolled {
  box-shadow: 0 4px 30px var(--shadow);
}

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

/* Logo */
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.logo span {
  display: inline-block;
}
.logo .logo-sub {
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 0.2em;
  display: block;
  margin-top: -2px;
}

/* 导航菜单 (桌面) */
.nav-menu {
  display: none;
  align-items: center;
  gap: var(--spacing-xl);
}
.nav-menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-med);
}
.nav-menu a:hover {
  color: var(--primary);
}
.nav-menu a:hover::after {
  width: 100%;
}
.nav-menu a.active {
  color: var(--primary);
}
.nav-menu a.active::after {
  width: 100%;
}

/* 导航右侧 CTA */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.header-actions .btn {
  padding: 10px 22px;
  font-size: 0.9rem;
  min-height: 42px;
}

/* 汉堡按钮 */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 34px;
  height: 34px;
  justify-content: center;
  align-items: center;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition-med);
  transform-origin: center;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单 (展开) */
.nav-menu.open {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: var(--spacing-lg) var(--container-padding);
  border-bottom: 1px solid rgba(217, 180, 194, 0.2);
  box-shadow: 0 8px 40px var(--shadow);
}
.nav-menu.open a {
  font-size: 1.05rem;
  padding: 8px 0;
  width: 100%;
  text-align: center;
}
.nav-menu.open a::after {
  display: none;
}
.nav-menu.open .btn {
  margin-top: var(--spacing-sm);
  width: 100%;
  justify-content: center;
}

/* ============================================================
   6. 英雄区 (Hero Section)
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: var(--bg);
  overflow: hidden;
  padding: var(--spacing-xxl) 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/images/hero-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(250, 246, 242, 0.88) 20%, rgba(250, 246, 242, 0.50) 70%, rgba(250, 246, 242, 0.20) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: var(--spacing-xl) 0;
}
.hero-content .badge {
  display: inline-block;
  background: rgba(155, 107, 126, 0.12);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
}
.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text);
}
.hero-content h1 .highlight {
  color: var(--primary);
  position: relative;
}
.hero-content p {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 480px;
  margin-bottom: var(--spacing-xl);
}
.hero-content .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}
.hero-content .hero-actions .btn {
  padding: 16px 38px;
  font-size: 1.05rem;
}
.hero-content .hero-trust {
  margin-top: var(--spacing-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--text-light);
}
.hero-content .hero-trust span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-content .hero-trust .icon {
  font-size: 1.1rem;
}

/* ============================================================
   7. 痛点与情境 (Pain Points)
   ============================================================ */
.pain-points {
  padding: var(--spacing-section-mobile) 0;
  background: var(--bg);
}

.pain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.pain-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  background: var(--bg-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 12px var(--shadow);
  transition: all var(--transition-med);
  border-left: 4px solid var(--secondary);
}
.pain-item:hover {
  transform: translateX(4px);
  box-shadow: 0 4px 24px rgba(61, 44, 51, 0.10);
}
.pain-item .icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  text-align: center;
  color: var(--primary);
}
.pain-item h3 {
  font-size: 1.05rem;
  margin-bottom: 2px;
}
.pain-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
  color: var(--text-light);
}
.pain-item .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--secondary-light);
  color: var(--primary);
  padding: 1px 10px;
  border-radius: var(--radius-full);
  margin-top: 4px;
}

/* ============================================================
   8. 解决方案 (Solutions)
   ============================================================ */
.solutions {
  padding: var(--spacing-section-mobile) 0;
  background: var(--bg-white);
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.solution-card {
  background: var(--bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 16px var(--shadow);
  transition: all var(--transition-med);
}
.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 48px rgba(61, 44, 51, 0.12);
}
.solution-card .card-img {
  height: 220px;
  background: var(--secondary-light);
  overflow: hidden;
}
.solution-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.solution-card:hover .card-img img {
  transform: scale(1.04);
}
.solution-card .card-body {
  padding: var(--spacing-lg);
}
.solution-card .card-body h3 {
  color: var(--primary);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}
.solution-card .card-body p {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-light);
}
.solution-card .card-body .ingredients {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--spacing-sm);
}
.solution-card .card-body .ingredients span {
  font-size: 0.75rem;
  background: var(--secondary-light);
  color: var(--primary-dark);
  padding: 2px 12px;
  border-radius: var(--radius-full);
}

/* ============================================================
   9. 信任背书 (Social Proof)
   ============================================================ */
.social-proof {
  padding: var(--spacing-section-mobile) 0;
  background: var(--bg);
}

.proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.testimonial-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 12px var(--shadow);
  transition: all var(--transition-med);
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(61, 44, 51, 0.10);
}
.testimonial-card .user {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}
.testimonial-card .user .avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--secondary-light);
  overflow: hidden;
  flex-shrink: 0;
}
.testimonial-card .user .avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.testimonial-card .user .name {
  font-weight: 600;
  font-size: 1rem;
}
.testimonial-card .user .title {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.testimonial-card .stars {
  color: var(--star-gold);
  font-size: 0.9rem;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
}
.testimonial-card blockquote {
  font-style: italic;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}
.testimonial-card blockquote::before {
  content: '\201C';
  font-size: 2rem;
  color: var(--secondary);
  line-height: 1;
  margin-right: 2px;
}
.testimonial-card blockquote::after {
  content: '\201D';
  font-size: 2rem;
  color: var(--secondary);
  line-height: 1;
  margin-left: 2px;
}

/* 认证徽章 */
.cert-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md) var(--spacing-xl);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 12px var(--shadow);
}
.cert-badges .badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}
.cert-badges .badge-item .icon {
  font-size: 1.3rem;
  color: var(--primary);
}

/* ============================================================
   10. 关于我们 (About Us)
   ============================================================ */
.about {
  padding: var(--spacing-section-mobile) 0;
  background: var(--bg-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.about-text p {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.8;
}
.about-text .highlight-text {
  font-size: 1.1rem;
  color: var(--text);
  font-weight: 500;
  border-left: 4px solid var(--primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.about-info {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  background: var(--bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
}
.about-info .info-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.95rem;
}
.about-info .info-item .icon {
  font-size: 1.2rem;
  color: var(--primary);
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}
.about-info .info-item .label {
  font-weight: 500;
  color: var(--text);
  min-width: 56px;
}
.about-info .info-item .value {
  color: var(--text-light);
}

.about-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--secondary-light);
  min-height: 240px;
}
.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.about-image:hover img {
  transform: scale(1.02);
}

/* ============================================================
   11. 常见问题 (FAQ)
   ============================================================ */
.faq {
  padding: var(--spacing-section-mobile) 0;
  background: var(--bg);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 10px var(--shadow);
  overflow: hidden;
  transition: all var(--transition-med);
}
.faq-item:hover {
  box-shadow: 0 4px 20px rgba(61, 44, 51, 0.08);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text);
  list-style: none;
  transition: background var(--transition-fast);
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  background: rgba(155, 107, 126, 0.04);
}
.faq-item summary .icon {
  flex-shrink: 0;
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform var(--transition-med);
}
.faq-item[open] summary .icon {
  transform: rotate(180deg);
}
.faq-item .faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-light);
  line-height: 1.7;
  font-size: 0.95rem;
}
.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   12. 终极呼吁 (Final CTA)
   ============================================================ */
.cta-final {
  padding: var(--spacing-section-mobile) 0;
  background: var(--primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-final::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/images/cta-bg-pattern.svg') repeat;
  opacity: 0.06;
  pointer-events: none;
}
.cta-final .container {
  position: relative;
  z-index: 1;
}
.cta-final .section-title h2 {
  color: #fff;
}
.cta-final .section-title h2::after {
  background: var(--accent);
}
.cta-final .section-title p {
  color: rgba(255, 255, 255, 0.8);
}

.cta-form {
  max-width: 560px;
  margin: var(--spacing-xl) auto 0;
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.cta-form .form-group {
  margin-bottom: var(--spacing-md);
}
.cta-form .form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 4px;
}
.cta-form .form-group input,
.cta-form .form-group select {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font-size: 0.95rem;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.cta-form .form-group input:focus,
.cta-form .form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(232, 168, 124, 0.25);
}
.cta-form .form-group select {
  appearance: auto;
}
.cta-form .btn {
  width: 100%;
  justify-content: center;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-size: 1.05rem;
  padding: 16px;
  margin-top: var(--spacing-sm);
}
.cta-form .btn:hover {
  background: #D4946A;
  border-color: #D4946A;
  transform: scale(1.02);
  box-shadow: 0 8px 30px rgba(232, 168, 124, 0.40);
}
.cta-form .form-note {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  margin-top: var(--spacing-md);
}

/* ============================================================
   13. 页尾 (Footer)
   ============================================================ */
.site-footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer-main {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}
.footer-brand .logo {
  color: #fff;
  font-size: 1.3rem;
}
.footer-brand .logo .logo-sub {
  color: rgba(255, 255, 255, 0.5);
}
.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
  margin-top: var(--spacing-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg) var(--spacing-xl);
}
.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: #fff;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-contact .contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}
.footer-contact .contact-item .icon {
  font-size: 1rem;
  width: 24px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}
.footer-bottom a:hover {
  color: #fff;
}
.footer-bottom .legal-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ============================================================
   14. 响应式设计 (Responsive)
   ============================================================ */

/* ---- 平板: 768px ---- */
@media (min-width: 768px) {
  :root {
    --spacing-section-mobile: 60px;
    --container-padding: 40px;
  }

  h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2.2rem;
  }
  h3 {
    font-size: 1.4rem;
  }

  /* Header */
  .header-inner {
    height: 76px;
  }
  .hamburger {
    display: none;
  }
  .nav-menu {
    display: flex !important;
    position: static;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
    padding: 0;
    border: none;
    flex-direction: row;
    gap: var(--spacing-lg);
  }
  .nav-menu a {
    font-size: 0.95rem;
    padding: 4px 0;
    width: auto;
    text-align: left;
  }
  .nav-menu a::after {
    display: block;
  }
  .nav-menu .btn {
    display: none;
  }
  .header-actions .btn {
    display: inline-flex;
  }

  /* 痛点网格 */
  .pain-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 解决方案网格 */
  .solution-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 信任背书网格 */
  .proof-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 关于我们 */
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .about-info {
    grid-template-columns: 1fr 1fr;
  }
  .about-image {
    min-height: 300px;
  }

  /* 页脚 */
  .footer-main {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ---- 桌面: 1024px ---- */
@media (min-width: 1024px) {
  :root {
    --spacing-section-mobile: 80px;
    --container-padding: 60px;
  }

  h1 {
    font-size: 3.8rem;
  }
  h2 {
    font-size: 2.6rem;
  }

  .hero {
    min-height: 100vh;
  }
  .hero-content h1 {
    font-size: 4rem;
  }
  .hero-content p {
    font-size: 1.25rem;
  }

  .pain-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .pain-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl);
    border-left: none;
    border-top: 4px solid var(--secondary);
  }
  .pain-item .icon {
    font-size: 2.4rem;
    width: auto;
  }
  .pain-item:hover {
    transform: translateY(-6px);
  }

  .solution-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .proof-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
  }
  .about-info {
    grid-template-columns: 1fr;
  }
  .about-image {
    min-height: 360px;
  }

  .cta-form {
    padding: var(--spacing-xl);
  }
  .cta-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }
}

/* ---- 大桌面: 1280px+ ---- */
@media (min-width: 1280px) {
  .hero-content h1 {
    font-size: 4.4rem;
  }
  .solution-grid {
    gap: var(--spacing-xxl);
  }
}

/* ============================================================
   15. 辅助与工具类 (Utilities)
   ============================================================ */
.text-center {
  text-align: center;
}
.text-primary {
  color: var(--primary);
}
.text-accent {
  color: var(--accent);
}
.mt-1 {
  margin-top: var(--spacing-sm);
}
.mt-2 {
  margin-top: var(--spacing-md);
}
.mt-3 {
  margin-top: var(--spacing-lg);
}
.mb-1 {
  margin-bottom: var(--spacing-sm);
}
.mb-2 {
  margin-bottom: var(--spacing-md);
}
.mb-3 {
  margin-bottom: var(--spacing-lg);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ============================================================
   16. 打印 & 辅助功能
   ============================================================ */
@media print {
  .site-header,
  .hero-bg::after {
    display: none;
  }
  .hero {
    min-height: auto;
    padding: 40px 0;
  }
  .hero-bg {
    opacity: 0.1;
  }
  .btn {
    border: 1px solid #ccc;
    background: #f5f5f5 !important;
    color: #333 !important;
    box-shadow: none !important;
    transform: none !important;
  }
  .card {
    box-shadow: none;
    border: 1px solid #e0e0e0;
  }
  .faq-item {
    box-shadow: none;
    border: 1px solid #e0e0e0;
  }
  .site-footer {
    background: #f5f5f5;
    color: #333;
  }
  .site-footer .logo {
    color: var(--primary);
  }
  .site-footer a {
    color: var(--primary);
  }
}