/* ==========================================================================
   钉钉官网落地页 · 等高地图与留白大字高定版样式表
   风格：等高地图·留白大字 ｜ 骨架：左右分屏
   首屏数据主张，再双图亮点，再手风琴能力，再安全认证 ｜ 底部价格三栏，页脚四列
   配色：主色群青 #3E2678 ｜ 辅色藤紫 #D9C9DE ｜ 点缀芽绿 #9E8733
   背景：等高线环状浅描 · 留白大字
   字体：联盟正黑体 + Sora + 现代无衬线
   ========================================================================== */

:root {
  /* 品牌色彩系统 */
  --color-ultramarine: #3E2678;        /* 主色 群青 */
  --color-ultramarine-dark: #2A1756;   /* 深群青 */
  --color-ultramarine-light: #52379A;  /* 明群青 */
  --color-fuji-purple: #D9C9DE;        /* 辅色 藤紫 */
  --color-fuji-subtle: #F3EFF5;        /* 极淡藤紫 */
  --color-bud-green: #9E8733;          /* 点缀 芽绿 */
  --color-bud-bright: #B59C40;         /* 明亮芽绿 */
  --color-pure-white: #FFFFFF;         /* 纯白 */
  --color-light-bg: #F7F5FA;           /* 浅灰紫底 */
  --color-border-contour: rgba(62, 38, 120, 0.12);
  --color-border-subtle: #E8E2EC;

  /* 文字颜色 */
  --text-main: #241445;
  --text-muted: #64557A;
  --text-light: #D9C9DE;
  --text-white: #FFFFFF;
  --text-green: #9E8733;

  /* 用户指示控件规范 */
  --btn-bg: #FFFFFF;
  --btn-border: #D8D0DE;
  --btn-radius: 4px;
  --btn-shadow: 0 2px 4px rgba(62, 38, 120, 0.04), 0 1px 2px rgba(62, 38, 120, 0.02);
  --btn-hover-shadow: 0 4px 10px rgba(62, 38, 120, 0.08);
  --tab-active-bg: rgba(142, 142, 142, 0.16);
  --tab-radius: 8px;

  /* 字体系统 */
  --font-display: "LianMengZhengHei", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-sora: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Monaco, Consolas, monospace;
}

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

html {
  font-family: var(--font-sora), var(--font-sans);
  background-color: var(--color-pure-white);
  color: var(--text-main);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: var(--color-pure-white);
  line-height: 1.6;
}

/* 背景：等高线环状浅描 · 留白大字 */
.contour-map-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: 
    radial-gradient(circle at 12% 18%, rgba(217, 201, 222, 0.35) 0%, transparent 40%),
    radial-gradient(circle at 88% 30%, rgba(158, 135, 51, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(62, 38, 120, 0.05) 0%, transparent 55%),
    #FFFFFF;
}

/* 纯 CSS 绘制等高线同心环纹理 */
.contour-lines-layer {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(ellipse at 80% 20%, transparent 0, transparent 95px, rgba(62, 38, 120, 0.035) 96px, transparent 97px, transparent 180px, rgba(62, 38, 120, 0.03) 181px, transparent 182px, transparent 270px, rgba(62, 38, 120, 0.025) 271px, transparent 272px),
    radial-gradient(ellipse at 15% 70%, transparent 0, transparent 120px, rgba(158, 135, 51, 0.04) 121px, transparent 122px, transparent 240px, rgba(158, 135, 51, 0.03) 241px, transparent 242px, transparent 360px, rgba(158, 135, 51, 0.02) 361px, transparent 362px);
  background-repeat: no-repeat;
  pointer-events: none;
}

/* 顶部矮导航 (极简吸顶，48-52px，不抢主视觉) */
.contour-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: 52px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: 100;
  contain: layout style;
}

.header-container {
  max-width: 1160px;
  height: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-ultramarine);
}

.brand-logo-img {
  width: 26px;
  height: 26px;
  object-fit: contain;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-ultramarine);
}

.brand-tagline {
  font-family: var(--font-sora);
  font-size: 0.8rem;
  color: var(--color-bud-green);
  margin-left: 0.4rem;
  font-weight: 600;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.header-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.18s ease;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-ultramarine);
  font-weight: 600;
}

.header-action {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* 控件：按钮白底、1px 浅灰边、4px 圆角、很轻的阴影 */
.btn-contour {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 1.15rem;
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: var(--btn-radius);
  color: var(--color-ultramarine);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--btn-shadow);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-contour:hover {
  border-color: #B2A2BC;
  box-shadow: var(--btn-hover-shadow);
  transform: translateY(-1px);
}

.btn-contour-primary {
  background-color: var(--color-ultramarine);
  border-color: var(--color-ultramarine);
  color: var(--color-pure-white);
  box-shadow: 0 2px 6px rgba(62, 38, 120, 0.25);
}

.btn-contour-primary:hover {
  background-color: var(--color-ultramarine-dark);
  border-color: var(--color-ultramarine-dark);
  color: var(--color-pure-white);
  box-shadow: 0 4px 12px rgba(62, 38, 120, 0.35);
}

.btn-contour-green {
  background: linear-gradient(135deg, #9E8733 0%, #826E26 100%);
  border-color: #9E8733;
  color: var(--color-pure-white);
}

.btn-contour-green:hover {
  background: linear-gradient(135deg, #B59C40 0%, #947E2E 100%);
  border-color: #B59C40;
  color: var(--color-pure-white);
}

/* 容器定义 */
.container-narrow {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
}

.container-split {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 1. 字标首屏模块 */
.hero-contour-section {
  padding: 3.5rem 0 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.contour-wordmark-wrap {
  width: 100%;
  max-width: 620px;
  margin: 0 auto 1.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contour-wordmark-img {
  width: 100%;
  max-width: 520px;
  height: auto;
  aspect-ratio: 1570 / 358;
  object-fit: contain;
  display: block;
}

.contour-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  color: var(--color-ultramarine);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin-bottom: 0.85rem;
}

.contour-hero-title .highlight-purple {
  color: var(--color-ultramarine-light);
}

.contour-hero-title .highlight-green {
  color: var(--color-bud-green);
  font-family: var(--font-sora);
  font-weight: 700;
}

.contour-hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.65;
  margin-bottom: 1.85rem;
}

.contour-action-duo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.2rem;
  flex-wrap: wrap;
}

/* 16:9 舞台与操作提示小方块 */
.stage-16-9-chassis {
  position: relative;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(62, 38, 120, 0.12), 0 1px 3px rgba(62, 38, 120, 0.05);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-ultramarine-dark);
}

.stage-16-9-chassis img,
.stage-16-9-chassis video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.overlay-shortcut-tip {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(42, 23, 86, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(217, 201, 222, 0.3);
  border-radius: 6px;
  padding: 0.45rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-fuji-purple);
  font-size: 0.82rem;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.key-cap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.45rem;
  min-width: 24px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 3px;
  color: var(--color-pure-white);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
}

/* 骨架特色：首屏数据主张 (左右分屏) */
.split-claims-section {
  padding: 3.5rem 0;
  background: linear-gradient(180deg, var(--color-pure-white) 0%, var(--color-light-bg) 100%);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.split-grid-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.claim-tagline {
  font-family: var(--font-sora);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-bud-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: block;
}

.claim-title {
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--color-ultramarine);
  line-height: 1.3;
  margin-bottom: 1rem;
}

.claim-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.data-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat-item {
  border-left: 2px solid var(--color-bud-green);
  padding-left: 0.85rem;
}

.stat-num {
  font-family: var(--font-sora);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--color-ultramarine);
  display: block;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 双图亮点区 (左右分屏交替) */
.duo-highlights-section {
  padding: 3.5rem 0;
}

.duo-card-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
  align-items: center;
}

.duo-card-wrap.reverse {
  direction: rtl;
}
.duo-card-wrap.reverse > * {
  direction: ltr;
}

.duo-visual {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(62, 38, 120, 0.08);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-fuji-subtle);
}

.duo-visual img {
  width: 100%;
  height: auto;
  display: block;
}

.duo-text-block {
  padding: 1rem 0;
}

/* 2. 场景切换模块 (浅灰底，图片标题，三个页签居中，约3秒轮播，配图800px宽圆角8px) */
.scenario-section {
  background-color: var(--color-light-bg);
  padding: 72px 0;
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-title-img-wrap {
  text-align: center;
  margin-bottom: 1.5rem;
}

.title-img-standard {
  height: 36px;
  max-width: 100%;
  object-fit: contain;
  display: inline-block;
}

.slide-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.slide-header-item {
  background-color: transparent;
  border-radius: var(--tab-radius);
  cursor: pointer;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.25s ease-out;
  text-align: center;
}

.slide-header-item:hover {
  background-color: rgba(142, 142, 142, 0.08);
  color: var(--color-ultramarine);
}

.slide-header-item.active {
  background-color: var(--tab-active-bg);
  color: var(--color-ultramarine);
}

.slide-header-desc {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 2px;
}

.slide-header-item.active .slide-header-desc {
  color: var(--color-bud-green);
  font-weight: 600;
}

.scenario-stage-wrap {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.scenario-panel {
  display: none;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(62, 38, 120, 0.08);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-pure-white);
}

.scenario-panel.active {
  display: block;
  animation: fadeIn 0.3s ease-in forwards;
}

.scenario-panel img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

.slide-dots {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
}

.slide-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: rgba(142, 142, 142, 0.25);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.slide-dot.active {
  background-color: var(--color-bud-green);
  transform: scale(1.35);
}

/* 3. 能力段，重复三次 (白、浅灰、白交替，块留白 72px，手机收成 40px，图宽800px圆角8px) */
.ability-section {
  align-items: center;
  display: flex;
  flex-direction: column;
  padding: 72px 0;
  text-align: center;
}

.ability-section.bg-light {
  background-color: var(--color-light-bg);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.ability-desc {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-main);
  margin-top: 18px;
  margin-bottom: 32px;
  line-height: 1.5;
}

.ability-desc span.highlight {
  color: var(--color-bud-green);
  font-weight: 700;
}

.ability-content-img {
  width: 100%;
  max-width: 800px;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(62, 38, 120, 0.08);
  border: 1px solid var(--color-border-subtle);
  display: block;
  margin: 0 auto;
}

/* 手风琴能力区 (Accordion Capabilities) */
.accordion-section {
  padding: 72px 0;
  background-color: var(--color-pure-white);
}

.accordion-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: flex-start;
}

.accordion-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.accordion-item {
  border: 1px solid var(--color-border-subtle);
  border-radius: 6px;
  padding: 1.25rem 1.4rem;
  background: var(--color-light-bg);
  cursor: pointer;
  transition: all 0.2s ease;
}

.accordion-item.active {
  border-color: var(--color-ultramarine);
  background: var(--color-pure-white);
  box-shadow: 0 6px 18px rgba(62, 38, 120, 0.06);
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-ultramarine);
}

.accordion-indicator {
  font-family: var(--font-mono);
  color: var(--color-bud-green);
  font-weight: bold;
}

.accordion-body {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 0.65rem;
  display: none;
}

.accordion-item.active .accordion-body {
  display: block;
}

/* 安全认证矩阵 (Security Compliance) */
.security-matrix-section {
  padding: 60px 0;
  background-color: var(--color-light-bg);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.security-grid-quad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.security-card {
  background: var(--color-pure-white);
  border: 1px solid var(--color-border-subtle);
  border-radius: 6px;
  padding: 1.5rem 1.2rem;
  text-align: center;
}

.security-badge {
  font-family: var(--font-sora);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-bud-green);
  margin-bottom: 0.35rem;
}

.security-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-ultramarine);
  margin-bottom: 0.25rem;
}

.security-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* 4. 收尾行动模块 (短句图片例如还在等什么，向下小箭头，两个按钮，弹层) */
.cta-contour-section {
  padding: 72px 0 54px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F5F1F8 100%);
}

.cta-tagline-img-wrap {
  margin-bottom: 14px;
}

.cta-tagline-img {
  width: 468px;
  max-width: calc(100% - 32px);
  aspect-ratio: 928 / 69;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

.cta-arrow-down {
  width: 32px;
  height: 32px;
  margin-bottom: 24px;
  animation: bounceDown 1.8s infinite ease-in-out;
  color: var(--color-ultramarine);
  opacity: 0.75;
}

.cta-btn-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* 底部价格三栏 (Pricing Tier Triad) */
.pricing-section {
  padding: 72px 0;
  background-color: var(--color-pure-white);
  border-top: 1px solid var(--color-border-subtle);
}

.pricing-grid-triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.pricing-card {
  background: var(--color-light-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: 8px;
  padding: 2rem 1.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pricing-card.featured {
  border-color: var(--color-ultramarine);
  background: #FAF7FD;
  box-shadow: 0 10px 30px rgba(62, 38, 120, 0.08);
}

.pricing-card:hover {
  transform: translateY(-2px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--color-bud-green);
  color: #FFF;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}

.tier-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-ultramarine);
}

.tier-price {
  font-family: var(--font-sora);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--color-ultramarine);
  margin: 0.75rem 0;
}

.tier-price span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.tier-features {
  list-style: none;
  margin: 1.2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tier-features li::before {
  content: "✔ ";
  color: var(--color-bud-green);
  font-weight: bold;
}

/* 5. 极简页脚四列 (页脚四列 + 一行低对比度信息) */
.contour-footer {
  border-top: 1px solid #EAE3EE;
  background-color: #F8F5FA;
  padding: 50px 16px 24px;
}

.footer-quad-grid {
  max-width: 1160px;
  margin: 0 auto 2.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer-col-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-ultramarine);
  margin-bottom: 0.85rem;
}

.footer-col-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: color 0.18s ease;
}

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

.footer-single-line {
  max-width: 1160px;
  margin: 0 auto;
  border-top: 1px solid #E5DDEB;
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.78rem;
  color: #8C7B9E;
  flex-wrap: wrap;
  text-align: center;
}

.footer-single-line a {
  color: #8C7B9E;
  text-decoration: none;
  transition: color 0.18s ease;
}

.footer-single-line a:hover {
  color: var(--color-ultramarine);
}

.footer-divider {
  width: 1px;
  height: 12px;
  background-color: #D3C7DC;
}

/* 弹层模态框 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(42, 23, 86, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 16px;
}

.modal-overlay.open {
  display: flex;
}

.modal-box {
  background: var(--color-pure-white);
  border-radius: 8px;
  width: 100%;
  max-width: 460px;
  padding: 2rem;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
  position: relative;
  border: 1px solid var(--color-border-subtle);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ultramarine);
  margin-bottom: 0.75rem;
}

.modal-body {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.modal-input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--btn-border);
  border-radius: var(--btn-radius);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  outline: none;
}

.modal-input:focus {
  border-color: var(--color-ultramarine);
}

.modal-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.25rem;
  color: #8C7B9E;
  cursor: pointer;
}

/* 动画定义 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* 响应式断点适配 */
@media (max-width: 900px) {
  .split-grid-dual,
  .duo-card-wrap,
  .accordion-wrap {
    grid-template-columns: 1fr;
  }
  .duo-card-wrap.reverse {
    direction: ltr;
  }
  .security-grid-quad {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid-triad {
    grid-template-columns: 1fr;
  }
  .footer-quad-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }
  .ability-section,
  .scenario-section {
    padding: 40px 0;
  }
  .ability-desc {
    align-items: flex-start;
    flex-direction: column;
    font-size: 18px;
    padding: 0 16px;
    text-align: left;
  }
  .slide-header {
    flex-direction: column;
    gap: 0.5rem;
  }
  .slide-dots {
    display: flex;
  }
  .security-grid-quad,
  .footer-quad-grid {
    grid-template-columns: 1fr;
  }
  .footer-single-line {
    flex-direction: column;
    gap: 8px;
  }
  .footer-divider {
    display: none;
  }
}