/* ==========================================================================
   Cryptomator 中文官网 - 全局样式表
   配色：深绿主色 + 亮绿强调（基于 Cryptomator Logo 配色）
   风格：扁平、现代、专业
   ========================================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  /* 主色调 - 深绿（基于 Logo 中的深色背景） */
  --color-primary: #47704C;
  --color-primary-dark: #1F3A28;
  --color-primary-light: #5C8A62;
  --color-primary-50: #EEF6EF;
  --color-primary-100: #D8EBDD;

  /* 强调色 - 亮绿（基于 Logo 字标与盾牌） */
  --color-accent: #48AF49;
  --color-accent-dark: #318C35;
  --color-accent-light: #6DD26C;
  --color-accent-50: #ECF8EC;

  /* 中性色 */
  --color-bg: #FFFFFF;
  --color-bg-soft: #F7FBF7;
  --color-bg-muted: #EFF6F0;
  --color-border: #DDE8DF;
  --color-text: #1B2C20;
  --color-text-soft: #486050;
  --color-text-muted: #8CA091;
  --color-white: #FFFFFF;
  --color-black: #000000;

  /* 功能色 */
  --color-success: #48AF49;
  --color-info: #3B82F6;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(71, 112, 76, 0.04), 0 1px 3px rgba(71, 112, 76, 0.06);
  --shadow-md: 0 4px 12px rgba(71, 112, 76, 0.06), 0 2px 4px rgba(71, 112, 76, 0.04);
  --shadow-lg: 0 12px 28px rgba(71, 112, 76, 0.10), 0 6px 12px rgba(71, 112, 76, 0.06);
  --shadow-xl: 0 24px 48px rgba(71, 112, 76, 0.14), 0 12px 24px rgba(71, 112, 76, 0.08);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 间距 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN",
    "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 过渡 */
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  /* 布局 */
  --container-max: 1200px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-accent-dark);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-sm {
  max-width: 880px;
}

.container-lg {
  max-width: 1320px;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  color: var(--color-text-soft);
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: 1.125rem;
  color: var(--color-text-soft);
  line-height: 1.75;
}

.text-accent {
  color: var(--color-accent);
}

.text-primary {
  color: var(--color-primary);
}

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

.text-gradient {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 5rem 0;
}

.section-sm {
  padding: 3rem 0;
}

.section-lg {
  padding: 7rem 0;
}

.section-bg-soft {
  background-color: var(--color-bg-soft);
}

.section-bg-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
}

.section-bg-primary h2,
.section-bg-primary h3,
.section-bg-primary p {
  color: var(--color-white);
}

.section-bg-primary p {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 区块标题 ---------- */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--color-accent-50);
  border-radius: var(--radius-full);
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-soft);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
  border: 2px solid transparent;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(72, 175, 73, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(72, 175, 73, 0.45);
}

.btn-secondary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

.btn-outline-light {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-white);
}

.btn-outline-light:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  padding: 0.5rem 0.75rem;
}

.btn-ghost:hover {
  color: var(--color-accent);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.0625rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ---------- 导航栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.nav-brand:hover {
  color: var(--color-primary);
}

.nav-brand .logo-mark {
  width: clamp(210px, 20vw, 280px);
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
}

.nav-brand .brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
}

.nav-brand .brand-name {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-brand .brand-cn {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-left: 0.25rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  color: var(--color-text-soft);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

.nav-link.active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 区 ---------- */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  background: linear-gradient(180deg, var(--color-primary-50) 0%, var(--color-bg) 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(72, 175, 73, 0.10) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(71, 112, 76, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 4rem;
  align-items: center;
}

.hero-content .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-content .eyebrow .dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(72, 175, 73, 0.2);
}

.hero-content h1 {
  margin-bottom: 1.5rem;
}

.hero-content .lead {
  font-size: 1.1875rem;
  margin-bottom: 2rem;
  color: var(--color-text-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.hero-stat .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.hero-stat .label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card {
  position: relative;
  background: linear-gradient(145deg, var(--color-white) 0%, var(--color-bg-soft) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 460px;
}

.hero-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.hero-card-head .title {
  font-weight: 700;
  color: var(--color-primary);
}

.hero-card-head .badge {
  font-size: 0.75rem;
  padding: 0.25rem 0.625rem;
  background-color: var(--color-success);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.vault-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.vault-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.vault-item:hover {
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.vault-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vault-info {
  flex: 1;
  min-width: 0;
}

.vault-info .name {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.9375rem;
}

.vault-info .meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.vault-lock {
  color: var(--color-success);
}

/* 浮动小卡片 */
.hero-float-card {
  position: absolute;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.hero-float-card.top-left {
  top: 8%;
  left: -5%;
  animation: floatY 4s ease-in-out infinite;
}

.hero-float-card.bottom-right {
  bottom: 8%;
  right: -5%;
  animation: floatY 4s ease-in-out infinite 2s;
}

.hero-float-card .ico {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-50);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- Logo & 图标 SVG ---------- */
.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon-lg {
  width: 32px;
  height: 32px;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

/* ---------- 通用卡片 ---------- */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.card-hover:hover {
  border-color: var(--color-primary-100);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-accent-50) 100%);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icon.accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  color: var(--color-white);
}

.card-icon.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
}

.card h3 {
  margin-bottom: 0.625rem;
}

.card p {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
}

/* ---------- 特性网格 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ---------- 平台图标列 ---------- */
.platform-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  margin-top: 3rem;
}

.platform-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.platform-item:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

.platform-item .icon {
  width: 36px;
  height: 36px;
}

/* ---------- 使用场景卡片 ---------- */
.scenario-card {
  position: relative;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  transition: var(--transition);
  overflow: hidden;
  height: 100%;
}

.scenario-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.scenario-card:hover {
  border-color: var(--color-accent-50);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.scenario-card:hover::before {
  transform: scaleX(1);
}

.scenario-card .scenario-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-50);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.scenario-card h3 {
  font-size: 1.1875rem;
  margin-bottom: 0.5rem;
}

.scenario-card .scenario-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.625rem;
  background-color: var(--color-primary-50);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.scenario-card p {
  font-size: 0.9375rem;
  color: var(--color-text-soft);
}

/* ---------- 用户评价 ---------- */
.testimonial {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.testimonial:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.testimonial-rating {
  display: flex;
  gap: 0.125rem;
  margin-bottom: 1rem;
  color: #FBBF24;
}

.testimonial-body {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  flex: 1;
}

.testimonial-body::before {
  content: "\201C";
  font-size: 2.5rem;
  color: var(--color-accent);
  line-height: 0.5;
  display: block;
  margin-bottom: 0.75rem;
  font-family: Georgia, serif;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.testimonial-author .name {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.9375rem;
}

.testimonial-author .meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ---------- 步骤流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-white);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  box-shadow: 0 6px 16px rgba(72, 175, 73, 0.3);
}

.step h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.9375rem;
  color: var(--color-text-soft);
}

/* ---------- CTA 区块 ---------- */
.cta-block {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 60%, var(--color-accent) 130%);
  border-radius: var(--radius-xl);
  padding: 4rem 3rem;
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-block::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(72, 175, 73, 0.3) 0%, transparent 70%);
}

.cta-block::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.cta-block > * {
  position: relative;
  z-index: 1;
}

.cta-block h2 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.cta-block p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.cta-block .btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.cta-block .btn-primary:hover {
  background-color: var(--color-bg-soft);
  color: var(--color-accent-dark);
}

.cta-block .btn-outline-light {
  margin-left: 0.875rem;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 2rem;
  font-size: 0.9375rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .nav-brand {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}

.footer-social {
  display: flex;
  gap: 0.625rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.65);
}

.footer-bottom a:hover {
  color: var(--color-white);
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

/* ---------- 下载弹窗 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(71, 112, 76, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.modal-overlay.is-open {
  display: flex;
  opacity: 1;
}

.modal {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 720px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.is-open .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.25rem;
  color: var(--color-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1.25rem;
  transition: var(--transition);
}

.modal-close:hover {
  background-color: var(--color-bg-muted);
  color: var(--color-text);
}

.modal-body {
  padding: 2rem;
}

.modal-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-tab {
  padding: 0.625rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition);
}

.modal-tab.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.modal-tab:hover {
  color: var(--color-text);
}

.modal-tab-panel {
  display: none;
}

.modal-tab-panel.is-active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

/* QR 二维码展示 */
.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.qr-card {
  text-align: center;
  padding: 1.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
  transition: var(--transition);
}

.qr-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.qr-img-wrap {
  width: 168px;
  height: 168px;
  margin: 0 auto 1rem;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-sm);
}

.qr-img-wrap svg,
.qr-img-wrap img {
  width: 100%;
  height: 100%;
  display: block;
}

.qr-card .qr-title {
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.qr-card .qr-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.qr-card .qr-store {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* 下载按钮组 */
.download-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.download-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: var(--transition);
  text-align: center;
}

.download-option:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-50);
  transform: translateY(-2px);
}

.download-option .icon {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.download-option .name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
}

.download-option .size {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.modal-note {
  display: flex;
  gap: 0.625rem;
  padding: 0.875rem 1rem;
  background-color: var(--color-accent-50);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text-soft);
  margin-top: 1rem;
}

.modal-note .icon {
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ---------- 页面标题横幅 ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(72, 175, 73, 0.2) 0%, transparent 50%);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.125rem;
  max-width: 680px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

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

.breadcrumb .sep {
  opacity: 0.6;
}

/* ---------- 表格 ---------- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.comparison-table th {
  background-color: var(--color-primary-50);
  color: var(--color-primary);
  font-weight: 700;
}

.comparison-table tbody tr:hover {
  background-color: var(--color-bg-soft);
}

.comparison-table .check {
  color: var(--color-success);
  font-weight: 700;
}

.comparison-table .cross {
  color: var(--color-text-muted);
}

.comparison-table .highlight {
  background-color: var(--color-accent-50);
  font-weight: 600;
  color: var(--color-accent-dark);
}

/* ---------- FAQ ---------- */
.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.is-open {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-100);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  background: none;
  cursor: pointer;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question .chevron {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item.is-open .faq-question .chevron {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-text-soft);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-primary) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(72, 175, 73, 0.15);
}

.timeline-item .time {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.timeline-item h4 {
  font-size: 1.0625rem;
  margin-bottom: 0.375rem;
  color: var(--color-text);
}

.timeline-item p {
  font-size: 0.9375rem;
  color: var(--color-text-soft);
}

/* ---------- 徽章 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-50);
  color: var(--color-primary);
}

.badge-accent {
  background-color: var(--color-accent-50);
  color: var(--color-accent-dark);
}

.badge-success {
  background-color: rgba(72, 175, 73, 0.12);
  color: var(--color-success);
}

/* ---------- 滚动动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
    max-width: 460px;
    margin: 0 auto;
  }

  .hero-float-card.top-left { left: 0; }
  .hero-float-card.bottom-right { right: 0; }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--color-white);
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    gap: 0.25rem;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .nav-actions.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.625rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
  }

  .section {
    padding: 3.5rem 0;
  }

  .section-lg {
    padding: 4.5rem 0;
  }

  .hero {
    padding: 3rem 0 3.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat .num {
    font-size: 1.5rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .platform-list {
    gap: 1.5rem;
  }

  .cta-block {
    padding: 2.5rem 1.5rem;
  }

  .cta-block .btn-outline-light {
    margin-left: 0;
    margin-top: 0.75rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .download-options {
    grid-template-columns: 1fr;
  }

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

  .modal {
    max-width: 100%;
  }

  .modal-body {
    padding: 1.5rem;
  }

  .hero-card {
    padding: 1.5rem;
  }

  .hero-float-card {
    display: none;
  }

  .page-hero {
    padding: 3.5rem 0 3rem;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.625rem; }

  .hero-actions .btn {
    width: 100%;
  }

  .nav-brand .logo-mark {
    width: 170px;
    height: 34px;
  }

  .nav-brand .brand-cn {
    display: none;
  }
}

/* ---------- 可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -44px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  top: 0;
  color: var(--color-white);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}